diff options
343 files changed, 8862 insertions, 5605 deletions
diff --git a/Documentation/devicetree/bindings/input/ilitek,ili2xxx.txt b/Documentation/devicetree/bindings/input/ilitek,ili2xxx.txt index dc194b2c151a..cdcaa3f52d25 100644 --- a/Documentation/devicetree/bindings/input/ilitek,ili2xxx.txt +++ b/Documentation/devicetree/bindings/input/ilitek,ili2xxx.txt @@ -1,9 +1,10 @@ -Ilitek ILI210x/ILI2117/ILI251x touchscreen controller +Ilitek ILI210x/ILI2117/ILI2120/ILI251x touchscreen controller Required properties: - compatible: ilitek,ili210x for ILI210x ilitek,ili2117 for ILI2117 + ilitek,ili2120 for ILI2120 ilitek,ili251x for ILI251x - reg: The I2C address of the device diff --git a/Documentation/driver-api/ipmb.rst b/Documentation/driver-api/ipmb.rst index 3ec3baed84c4..209c49e05116 100644 --- a/Documentation/driver-api/ipmb.rst +++ b/Documentation/driver-api/ipmb.rst @@ -71,9 +71,13 @@ b) Example for device tree:: ipmb@10 { compatible = "ipmb-dev"; reg = <0x10>; + i2c-protocol; }; }; +If xmit of data to be done using raw i2c block vs smbus +then "i2c-protocol" needs to be defined as above. + 2) Manually from Linux:: modprobe ipmb-dev-int diff --git a/Documentation/virtual/guest-halt-polling.txt b/Documentation/virt/guest-halt-polling.rst index b3a2a294532d..b4e747942417 100644 --- a/Documentation/virtual/guest-halt-polling.txt +++ b/Documentation/virt/guest-halt-polling.rst @@ -1,9 +1,11 @@ +================== Guest halt polling ================== The cpuidle_haltpoll driver, with the haltpoll governor, allows the guest vcpus to poll for a specified amount of time before halting. + This provides the following benefits to host side polling: 1) The POLL flag is set while polling is performed, which allows @@ -29,18 +31,21 @@ Module Parameters The haltpoll governor has 5 tunable module parameters: 1) guest_halt_poll_ns: + Maximum amount of time, in nanoseconds, that polling is performed before halting. Default: 200000 2) guest_halt_poll_shrink: + Division factor used to shrink per-cpu guest_halt_poll_ns when wakeup event occurs after the global guest_halt_poll_ns. Default: 2 3) guest_halt_poll_grow: + Multiplication factor used to grow per-cpu guest_halt_poll_ns when event occurs after per-cpu guest_halt_poll_ns but before global guest_halt_poll_ns. @@ -48,6 +53,7 @@ but before global guest_halt_poll_ns. Default: 2 4) guest_halt_poll_grow_start: + The per-cpu guest_halt_poll_ns eventually reaches zero in case of an idle system. This value sets the initial per-cpu guest_halt_poll_ns when growing. This can @@ -66,7 +72,7 @@ high once achieves global guest_halt_poll_ns value). Default: Y -The module parameters can be set from the debugfs files in: +The module parameters can be set from the debugfs files in:: /sys/module/haltpoll/parameters/ @@ -74,5 +80,5 @@ Further Notes ============= - Care should be taken when setting the guest_halt_poll_ns parameter as a -large value has the potential to drive the cpu usage to 100% on a machine which -would be almost entirely idle otherwise. + large value has the potential to drive the cpu usage to 100% on a machine + which would be almost entirely idle otherwise. diff --git a/Documentation/virt/index.rst b/Documentation/virt/index.rst index 062ffb527043..de1ab81df958 100644 --- a/Documentation/virt/index.rst +++ b/Documentation/virt/index.rst @@ -8,7 +8,9 @@ Linux Virtualization Support :maxdepth: 2 kvm/index + uml/user_mode_linux paravirt_ops + guest-halt-polling .. only:: html and subproject diff --git a/Documentation/virt/kvm/api.txt b/Documentation/virt/kvm/api.rst index c6e1ce5d40de..97a72a53fa4b 100644 --- a/Documentation/virt/kvm/api.txt +++ b/Documentation/virt/kvm/api.rst @@ -1,8 +1,11 @@ +.. SPDX-License-Identifier: GPL-2.0 + +=================================================================== The Definitive KVM (Kernel-based Virtual Machine) API Documentation =================================================================== 1. General description ----------------------- +====================== The kvm API is a set of ioctls that are issued to control various aspects of a virtual machine. The ioctls belong to the following classes: @@ -33,7 +36,7 @@ of a virtual machine. The ioctls belong to the following classes: was used to create the VM. 2. File descriptors -------------------- +=================== The kvm API is centered around file descriptors. An initial open("/dev/kvm") obtains a handle to the kvm subsystem; this handle @@ -70,7 +73,7 @@ the VM is shut down. 3. Extensions -------------- +============= As of Linux 2.6.22, the KVM ABI has been stabilized: no backward incompatible change are allowed. However, there is an extension @@ -84,13 +87,14 @@ set of ioctls is available for application use. 4. API description ------------------- +================== This section describes ioctls that can be used to control kvm guests. For each ioctl, the following information is provided along with a description: - Capability: which KVM extension provides this ioctl. Can be 'basic', + Capability: + which KVM extension provides this ioctl. Can be 'basic', which means that is will be provided by any kernel that supports API version 12 (see section 4.1), a KVM_CAP_xyz constant, which means availability needs to be checked with KVM_CHECK_EXTENSION @@ -99,24 +103,29 @@ description: availability: for kernels that don't support the ioctl, the ioctl returns -ENOTTY. - Architectures: which instruction set architectures provide this ioctl. + Architectures: + which instruction set architectures provide this ioctl. x86 includes both i386 and x86_64. - Type: system, vm, or vcpu. + Type: + system, vm, or vcpu. - Parameters: what parameters are accepted by the ioctl. + Parameters: + what parameters are accepted by the ioctl. - Returns: the return value. General error numbers (EBADF, ENOMEM, EINVAL) + Returns: + the return value. General error numbers (EBADF, ENOMEM, EINVAL) are not detailed, but errors with specific meanings are. 4.1 KVM_GET_API_VERSION +----------------------- -Capability: basic -Architectures: all -Type: system ioctl -Parameters: none -Returns: the constant KVM_API_VERSION (=12) +:Capability: basic +:Architectures: all +:Type: system ioctl +:Parameters: none +:Returns: the constant KVM_API_VERSION (=12) This identifies the API version as the stable kvm API. It is not expected that this number will change. However, Linux 2.6.20 and @@ -127,12 +136,13 @@ described as 'basic' will be available. 4.2 KVM_CREATE_VM +----------------- -Capability: basic -Architectures: all -Type: system ioctl -Parameters: machine type identifier (KVM_VM_*) -Returns: a VM fd that can be used to control the new virtual machine. +:Capability: basic +:Architectures: all +:Type: system ioctl +:Parameters: machine type identifier (KVM_VM_*) +:Returns: a VM fd that can be used to control the new virtual machine. The new VM has no virtual cpus and no memory. You probably want to use 0 as machine type. @@ -155,17 +165,17 @@ identifier, where IPA_Bits is the maximum width of any physical address used by the VM. The IPA_Bits is encoded in bits[7-0] of the machine type identifier. -e.g, to configure a guest to use 48bit physical address size : +e.g, to configure a guest to use 48bit physical address size:: vm_fd = ioctl(dev_fd, KVM_CREATE_VM, KVM_VM_TYPE_ARM_IPA_SIZE(48)); -The requested size (IPA_Bits) must be : - 0 - Implies default size, 40bits (for backward compatibility) +The requested size (IPA_Bits) must be: - or - - N - Implies N bits, where N is a positive integer such that, + == ========================================================= + 0 Implies default size, 40bits (for backward compatibility) + N Implies N bits, where N is a positive integer such that, 32 <= N <= Host_IPA_Limit + == ========================================================= Host_IPA_Limit is the maximum possible value for IPA_Bits on the host and is dependent on the CPU capability and the kernel configuration. The limit can @@ -179,21 +189,28 @@ host physical address translations). 4.3 KVM_GET_MSR_INDEX_LIST, KVM_GET_MSR_FEATURE_INDEX_LIST +---------------------------------------------------------- + +:Capability: basic, KVM_CAP_GET_MSR_FEATURES for KVM_GET_MSR_FEATURE_INDEX_LIST +:Architectures: x86 +:Type: system ioctl +:Parameters: struct kvm_msr_list (in/out) +:Returns: 0 on success; -1 on error -Capability: basic, KVM_CAP_GET_MSR_FEATURES for KVM_GET_MSR_FEATURE_INDEX_LIST -Architectures: x86 -Type: system ioctl -Parameters: struct kvm_msr_list (in/out) -Returns: 0 on success; -1 on error Errors: - EFAULT: the msr index list cannot be read from or written to - E2BIG: the msr index list is to be to fit in the array specified by + + ====== ============================================================ + EFAULT the msr index list cannot be read from or written to + E2BIG the msr index list is to be to fit in the array specified by the user. + ====== ============================================================ -struct kvm_msr_list { +:: + + struct kvm_msr_list { __u32 nmsrs; /* number of msrs in entries */ __u32 indices[0]; -}; + }; The user fills in the size of the indices array in nmsrs, and in return kvm adjusts nmsrs to reflect the actual number of msrs and fills in the @@ -214,12 +231,13 @@ otherwise. 4.4 KVM_CHECK_EXTENSION +----------------------- -Capability: basic, KVM_CAP_CHECK_EXTENSION_VM for vm ioctl -Architectures: all -Type: system ioctl, vm ioctl -Parameters: extension identifier (KVM_CAP_*) -Returns: 0 if unsupported; 1 (or some other positive integer) if supported +:Capability: basic, KVM_CAP_CHECK_EXTENSION_VM for vm ioctl +:Architectures: all +:Type: system ioctl, vm ioctl +:Parameters: extension identifier (KVM_CAP_*) +:Returns: 0 if unsupported; 1 (or some other positive integer) if supported The API allows the application to query about extensions to the core kvm API. Userspace passes an extension identifier (an integer) and @@ -232,12 +250,13 @@ It is thus encouraged to use the vm ioctl to query for capabilities (available with KVM_CAP_CHECK_EXTENSION_VM on the vm fd) 4.5 KVM_GET_VCPU_MMAP_SIZE +-------------------------- -Capability: basic -Architectures: all -Type: system ioctl -Parameters: none -Returns: size of vcpu mmap area, in bytes +:Capability: basic +:Architectures: all +:Type: system ioctl +:Parameters: none +:Returns: size of vcpu mmap area, in bytes The KVM_RUN ioctl (cf.) communicates with userspace via a shared memory region. This ioctl returns the size of that region. See the @@ -245,23 +264,25 @@ KVM_RUN documentation for details. 4.6 KVM_SET_MEMORY_REGION +------------------------- -Capability: basic -Architectures: all -Type: vm ioctl -Parameters: struct kvm_memory_region (in) -Returns: 0 on success, -1 on error +:Capability: basic +:Architectures: all +:Type: vm ioctl +:Parameters: struct kvm_memory_region (in) +:Returns: 0 on success, -1 on error This ioctl is obsolete and has been removed. 4.7 KVM_CREATE_VCPU +------------------- -Capability: basic -Architectures: all -Type: vm ioctl -Parameters: vcpu id (apic id on x86) -Returns: vcpu fd on success, -1 on error +:Capability: basic +:Architectures: all +:Type: vm ioctl +:Parameters: vcpu id (apic id on x86) +:Returns: vcpu fd on success, -1 on error This API adds a vcpu to a virtual machine. No more than max_vcpus may be added. The vcpu id is an integer in the range [0, max_vcpu_id). @@ -302,22 +323,25 @@ cpu's hardware control block. 4.8 KVM_GET_DIRTY_LOG (vm ioctl) +-------------------------------- -Capability: basic -Architectures: all -Type: vm ioctl -Parameters: struct kvm_dirty_log (in/out) -Returns: 0 on success, -1 on error +:Capability: basic +:Architectures: all +:Type: vm ioctl +:Parameters: struct kvm_dirty_log (in/out) +:Returns: 0 on success, -1 on error -/* for KVM_GET_DIRTY_LOG */ -struct kvm_dirty_log { +:: + + /* for KVM_GET_DIRTY_LOG */ + struct kvm_dirty_log { __u32 slot; __u32 padding; union { void __user *dirty_bitmap; /* one bit per page */ __u64 padding; }; -}; + }; Given a memory slot, return a bitmap containing any pages dirtied since the last call to this ioctl. Bit 0 is the first page in the @@ -334,25 +358,31 @@ KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 is enabled. For more information, see the description of the capability. 4.9 KVM_SET_MEMORY_ALIAS +------------------------ -Capability: basic -Architectures: x86 -Type: vm ioctl -Parameters: struct kvm_memory_alias (in) -Returns: 0 (success), -1 (error) +:Capability: basic +:Architectures: x86 +:Type: vm ioctl +:Parameters: struct kvm_memory_alias (in) +:Returns: 0 (success), -1 (error) This ioctl is obsolete and has been removed. 4.10 KVM_RUN +------------ + +:Capability: basic +:Architectures: all +:Type: vcpu ioctl +:Parameters: none +:Returns: 0 on success, -1 on error -Capability: basic -Architectures: all -Type: vcpu ioctl -Parameters: none -Returns: 0 on success, -1 on error Errors: - EINTR: an unmasked signal is pending + + ===== ============================= + EINTR an unmasked signal is pending + ===== ============================= This ioctl is used to run a guest virtual cpu. While there are no explicit parameters, there is an implicit parameter block that can be @@ -362,42 +392,46 @@ kvm_run' (see below). 4.11 KVM_GET_REGS +----------------- -Capability: basic -Architectures: all except ARM, arm64 -Type: vcpu ioctl -Parameters: struct kvm_regs (out) -Returns: 0 on success, -1 on error +:Capability: basic +:Architectures: all except ARM, arm64 +:Type: vcpu ioctl +:Parameters: struct kvm_regs (out) +:Returns: 0 on success, -1 on error Reads the general purpose registers from the vcpu. -/* x86 */ -struct kvm_regs { +:: + + /* x86 */ + struct kvm_regs { /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */ __u64 rax, rbx, rcx, rdx; __u64 rsi, rdi, rsp, rbp; __u64 r8, r9, r10, r11; __u64 r12, r13, r14, r15; __u64 rip, rflags; -}; + }; -/* mips */ -struct kvm_regs { + /* mips */ + struct kvm_regs { /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */ __u64 gpr[32]; __u64 hi; __u64 lo; __u64 pc; -}; + }; 4.12 KVM_SET_REGS +----------------- -Capability: basic -Architectures: all except ARM, arm64 -Type: vcpu ioctl -Parameters: struct kvm_regs (in) -Returns: 0 on success, -1 on error +:Capability: basic +:Architectures: all except ARM, arm64 +:Type: vcpu ioctl +:Parameters: struct kvm_regs (in) +:Returns: 0 on success, -1 on error Writes the general purpose registers into the vcpu. @@ -405,17 +439,20 @@ See KVM_GET_REGS for the data structure. 4.13 KVM_GET_SREGS +------------------ -Capability: basic -Architectures: x86, ppc -Type: vcpu ioctl -Parameters: struct kvm_sregs (out) -Returns: 0 on success, -1 on error +:Capability: basic +:Architectures: x86, ppc +:Type: vcpu ioctl +:Parameters: struct kvm_sregs (out) +:Returns: 0 on success, -1 on error Reads special registers from the vcpu. -/* x86 */ -struct kvm_sregs { +:: + + /* x86 */ + struct kvm_sregs { struct kvm_segment cs, ds, es, fs, gs, ss; struct kvm_segment tr, ldt; struct kvm_dtable gdt, idt; @@ -423,9 +460,9 @@ struct kvm_sregs { __u64 efer; __u64 apic_base; __u64 interrupt_bitmap[(KVM_NR_INTERRUPTS + 63) / 64]; -}; + }; -/* ppc -- see arch/powerpc/include/uapi/asm/kvm.h */ + /* ppc -- see arch/powerpc/include/uapi/asm/kvm.h */ interrupt_bitmap is a bitmap of pending external interrupts. At most one bit may be set. This interrupt has been acknowledged by the APIC @@ -433,29 +470,33 @@ but not yet injected into the cpu core. 4.14 KVM_SET_SREGS +------------------ -Capability: basic -Architectures: x86, ppc -Type: vcpu ioctl -Parameters: struct kvm_sregs (in) -Returns: 0 on success, -1 on error +:Capability: basic +:Architectures: x86, ppc +:Type: vcpu ioctl +:Parameters: struct kvm_sregs (in) +:Returns: 0 on success, -1 on error Writes special registers into the vcpu. See KVM_GET_SREGS for the data structures. 4.15 KVM_TRANSLATE +------------------ -Capability: basic -Architectures: x86 -Type: vcpu ioctl -Parameters: struct kvm_translation (in/out) -Returns: 0 on success, -1 on error +:Capability: basic +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: struct kvm_translation (in/out) +:Returns: 0 on success, -1 on error Translates a virtual address according to the vcpu's current address translation mode. -struct kvm_translation { +:: + + struct kvm_translation { /* in */ __u64 linear_address; @@ -465,59 +506,68 @@ struct kvm_translation { __u8 writeable; __u8 usermode; __u8 pad[5]; -}; + }; 4.16 KVM_INTERRUPT +------------------ -Capability: basic -Architectures: x86, ppc, mips -Type: vcpu ioctl -Parameters: struct kvm_interrupt (in) -Returns: 0 on success, negative on failure. +:Capability: basic +:Architectures: x86, ppc, mips +:Type: vcpu ioctl +:Parameters: struct kvm_interrupt (in) +:Returns: 0 on success, negative on failure. Queues a hardware interrupt vector to be injected. -/* for KVM_INTERRUPT */ -struct kvm_interrupt { +:: + + /* for KVM_INTERRUPT */ + struct kvm_interrupt { /* in */ __u32 irq; -}; + }; X86: +^^^^ + +:Returns: -Returns: 0 on success, - -EEXIST if an interrupt is already enqueued - -EINVAL the the irq number is invalid - -ENXIO if the PIC is in the kernel - -EFAULT if the pointer is invalid + ========= =================================== + 0 on success, + -EEXIST if an interrupt is already enqueued + -EINVAL the the irq number is invalid + -ENXIO if the PIC is in the kernel + -EFAULT if the pointer is invalid + ========= =================================== Note 'irq' is an interrupt vector, not an interrupt pin or line. This ioctl is useful if the in-kernel PIC is not used. PPC: +^^^^ Queues an external interrupt to be injected. This ioctl is overleaded with 3 different irq values: a) KVM_INTERRUPT_SET - This injects an edge type external interrupt into the guest once it's ready - to receive interrupts. When injected, the interrupt is done. + This injects an edge type external interrupt into the guest once it's ready + to receive interrupts. When injected, the interrupt is done. b) KVM_INTERRUPT_UNSET - This unsets any pending interrupt. + This unsets any pending interrupt. - Only available with KVM_CAP_PPC_UNSET_IRQ. + Only available with KVM_CAP_PPC_UNSET_IRQ. c) KVM_INTERRUPT_SET_LEVEL - This injects a level type external interrupt into the guest context. The - interrupt stays pending until a specific ioctl with KVM_INTERRUPT_UNSET - is triggered. + This injects a level type external interrupt into the guest context. The + interrupt stays pending until a specific ioctl with KVM_INTERRUPT_UNSET + is triggered. - Only available with KVM_CAP_PPC_IRQ_LEVEL. + Only available with KVM_CAP_PPC_IRQ_LEVEL. Note that any value for 'irq' other than the ones stated above is invalid and incurs unexpected behavior. @@ -525,6 +575,7 @@ and incurs unexpected behavior. This is an asynchronous vcpu ioctl and can be invoked from any thread. MIPS: +^^^^^ Queues an external interrupt to be injected into the virtual CPU. A negative interrupt number dequeues the interrupt. @@ -533,24 +584,26 @@ This is an asynchronous vcpu ioctl and can be invoked from any thread. 4.17 KVM_DEBUG_GUEST +-------------------- -Capability: basic -Architectures: none -Type: vcpu ioctl -Parameters: none) -Returns: -1 on error +:Capability: basic +:Architectures: none +:Type: vcpu ioctl +:Parameters: none) +:Returns: -1 on error Support for this has been removed. Use KVM_SET_GUEST_DEBUG instead. 4.18 KVM_GET_MSRS +----------------- -Capability: basic (vcpu), KVM_CAP_GET_MSR_FEATURES (system) -Architectures: x86 -Type: system ioctl, vcpu ioctl -Parameters: struct kvm_msrs (in/out) -Returns: number of msrs successfully returned; - -1 on error +:Capability: basic (vcpu), KVM_CAP_GET_MSR_FEATURES (system) +:Architectures: x86 +:Type: system ioctl, vcpu ioctl +:Parameters: struct kvm_msrs (in/out) +:Returns: number of msrs successfully returned; + -1 on error When used as a system ioctl: Reads the values of MSR-based features that are available for the VM. This @@ -562,18 +615,20 @@ When used as a vcpu ioctl: Reads model-specific registers from the vcpu. Supported msr indices can be obtained using KVM_GET_MSR_INDEX_LIST in a system ioctl. -struct kvm_msrs { +:: + + struct kvm_msrs { __u32 nmsrs; /* number of msrs in entries */ __u32 pad; struct kvm_msr_entry entries[0]; -}; + }; -struct kvm_msr_entry { + struct kvm_msr_entry { __u32 index; __u32 reserved; __u64 data; -}; + }; Application code should set the 'nmsrs' member (which indicates the size of the entries array) and the 'index' member of each array entry. @@ -581,12 +636,13 @@ kvm will fill in the 'data' member. 4.19 KVM_SET_MSRS +----------------- -Capability: basic -Architectures: x86 -Type: vcpu ioctl -Parameters: struct kvm_msrs (in) -Returns: number of msrs successfully set (see below), -1 on error +:Capability: basic +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: struct kvm_msrs (in) +:Returns: number of msrs successfully set (see below), -1 on error Writes model-specific registers to the vcpu. See KVM_GET_MSRS for the data structures. @@ -602,41 +658,44 @@ MSRs that have been set successfully. 4.20 KVM_SET_CPUID +------------------ -Capability: basic -Architectures: x86 -Type: vcpu ioctl -Parameters: struct kvm_cpuid (in) -Returns: 0 on success, -1 on error +:Capability: basic +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: struct kvm_cpuid (in) +:Returns: 0 on success, -1 on error Defines the vcpu responses to the cpuid instruction. Applications should use the KVM_SET_CPUID2 ioctl if available. +:: -struct kvm_cpuid_entry { + struct kvm_cpuid_entry { __u32 function; __u32 eax; __u32 ebx; __u32 ecx; __u32 edx; __u32 padding; -}; + }; -/* for KVM_SET_CPUID */ -struct kvm_cpuid { + /* for KVM_SET_CPUID */ + struct kvm_cpuid { __u32 nent; __u32 padding; struct kvm_cpuid_entry entries[0]; -}; + }; 4.21 KVM_SET_SIGNAL_MASK +------------------------ -Capability: basic -Architectures: all -Type: vcpu ioctl -Parameters: struct kvm_signal_mask (in) -Returns: 0 on success, -1 on error +:Capability: basic +:Architectures: all +:Type: vcpu ioctl +:Parameters: struct kvm_signal_mask (in) +:Returns: 0 on success, -1 on error Defines which signals are blocked during execution of KVM_RUN. This signal mask temporarily overrides the threads signal mask. Any @@ -646,25 +705,30 @@ their traditional behaviour) will cause KVM_RUN to return with -EINTR. Note the signal will only be delivered if not blocked by the original signal mask. -/* for KVM_SET_SIGNAL_MASK */ -struct kvm_signal_mask { +:: + + /* for KVM_SET_SIGNAL_MASK */ + struct kvm_signal_mask { __u32 len; __u8 sigset[0]; -}; + }; 4.22 KVM_GET_FPU +---------------- -Capability: basic -Architectures: x86 -Type: vcpu ioctl -Parameters: struct kvm_fpu (out) -Returns: 0 on success, -1 on error +:Capability: basic +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: struct kvm_fpu (out) +:Returns: 0 on success, -1 on error Reads the floating point state from the vcpu. -/* for KVM_GET_FPU and KVM_SET_FPU */ -struct kvm_fpu { +:: + + /* for KVM_GET_FPU and KVM_SET_FPU */ + struct kvm_fpu { __u8 fpr[8][16]; __u16 fcw; __u16 fsw; @@ -676,21 +740,24 @@ struct kvm_fpu { __u8 xmm[16][16]; __u32 mxcsr; __u32 pad2; -}; + }; 4.23 KVM_SET_FPU +---------------- -Capability: basic -Architectures: x86 -Type: vcpu ioctl -Parameters: struct kvm_fpu (in) -Returns: 0 on success, -1 on error +:Capability: basic +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: struct kvm_fpu (in) +:Returns: 0 on success, -1 on error Writes the floating point state to the vcpu. -/* for KVM_GET_FPU and KVM_SET_FPU */ -struct kvm_fpu { +:: + + /* for KVM_GET_FPU and KVM_SET_FPU */ + struct kvm_fpu { __u8 fpr[8][16]; __u16 fcw; __u16 fsw; @@ -702,16 +769,17 @@ struct kvm_fpu { __u8 xmm[16][16]; __u32 mxcsr; __u32 pad2; -}; + }; 4.24 KVM_CREATE_IRQCHIP +----------------------- -Capability: KVM_CAP_IRQCHIP, KVM_CAP_S390_IRQCHIP (s390) -Architectures: x86, ARM, arm64, s390 -Type: vm ioctl -Parameters: none -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_IRQCHIP, KVM_CAP_S390_IRQCHIP (s390) +:Architectures: x86, ARM, arm64, s390 +:Type: vm ioctl +:Parameters: none +:Returns: 0 on success, -1 on error Creates an interrupt controller model in the kernel. On x86, creates a virtual ioapic, a virtual PIC (two PICs, nested), and sets up @@ -727,12 +795,13 @@ before KVM_CREATE_IRQCHIP can be used. 4.25 KVM_IRQ_LINE +----------------- -Capability: KVM_CAP_IRQCHIP -Architectures: x86, arm, arm64 -Type: vm ioctl -Parameters: struct kvm_irq_level -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_IRQCHIP +:Architectures: x86, arm, arm64 +:Type: vm ioctl +:Parameters: struct kvm_irq_level +:Returns: 0 on success, -1 on error Sets the level of a GSI input to the interrupt controller model in the kernel. On some architectures it is required that an interrupt controller model has @@ -756,16 +825,20 @@ of course). ARM/arm64 can signal an interrupt either at the CPU level, or at the in-kernel irqchip (GIC), and for in-kernel irqchip can tell the GIC to use PPIs designated for specific cpus. The irq field is interpreted -like this: +like this::  bits: | 31 ... 28 | 27 ... 24 | 23 ... 16 | 15 ... 0 | field: | vcpu2_index | irq_type | vcpu_index | irq_id | The irq_type field has the following values: -- irq_type[0]: out-of-kernel GIC: irq_id 0 is IRQ, irq_id 1 is FIQ -- irq_type[1]: in-kernel GIC: SPI, irq_id between 32 and 1019 (incl.) + +- irq_type[0]: + out-of-kernel GIC: irq_id 0 is IRQ, irq_id 1 is FIQ +- irq_type[1]: + in-kernel GIC: SPI, irq_id between 32 and 1019 (incl.) (the vcpu_index field is ignored) -- irq_type[2]: in-kernel GIC: PPI, irq_id between 16 and 31 (incl.) +- irq_type[2]: + in-kernel GIC: PPI, irq_id between 16 and 31 (incl.) (The irq_id field thus corresponds nicely to the IRQ ID in the ARM GIC specs) @@ -779,27 +852,32 @@ Note that on arm/arm64, the KVM_CAP_IRQCHIP capability only conditions injection of interrupts for the in-kernel irqchip. KVM_IRQ_LINE can always be used for a userspace interrupt controller. -struct kvm_irq_level { +:: + + struct kvm_irq_level { union { __u32 irq; /* GSI */ __s32 status; /* not used for KVM_IRQ_LEVEL */ }; __u32 level; /* 0 or 1 */ -}; + }; 4.26 KVM_GET_IRQCHIP +-------------------- -Capability: KVM_CAP_IRQCHIP -Architectures: x86 -Type: vm ioctl -Parameters: struct kvm_irqchip (in/out) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_IRQCHIP +:Architectures: x86 +:Type: vm ioctl +:Parameters: struct kvm_irqchip (in/out) +:Returns: 0 on success, -1 on error Reads the state of a kernel interrupt controller created with KVM_CREATE_IRQCHIP into a buffer provided by the caller. -struct kvm_irqchip { +:: + + struct kvm_irqchip { __u32 chip_id; /* 0 = PIC1, 1 = PIC2, 2 = IOAPIC */ __u32 pad; union { @@ -807,21 +885,24 @@ struct kvm_irqchip { struct kvm_pic_state pic; struct kvm_ioapic_state ioapic; } chip; -}; + }; 4.27 KVM_SET_IRQCHIP +-------------------- -Capability: KVM_CAP_IRQCHIP -Architectures: x86 -Type: vm ioctl -Parameters: struct kvm_irqchip (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_IRQCHIP +:Architectures: x86 +:Type: vm ioctl +:Parameters: struct kvm_irqchip (in) +:Returns: 0 on success, -1 on error Sets the state of a kernel interrupt controller created with KVM_CREATE_IRQCHIP from a buffer provided by the caller. -struct kvm_irqchip { +:: + + struct kvm_irqchip { __u32 chip_id; /* 0 = PIC1, 1 = PIC2, 2 = IOAPIC */ __u32 pad; union { @@ -829,16 +910,17 @@ struct kvm_irqchip { struct kvm_pic_state pic; struct kvm_ioapic_state ioapic; } chip; -}; + }; 4.28 KVM_XEN_HVM_CONFIG +----------------------- -Capability: KVM_CAP_XEN_HVM -Architectures: x86 -Type: vm ioctl -Parameters: struct kvm_xen_hvm_config (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_XEN_HVM +:Architectures: x86 +:Type: vm ioctl +:Parameters: struct kvm_xen_hvm_config (in) +:Returns: 0 on success, -1 on error Sets the MSR that the Xen HVM guest uses to initialize its hypercall page, and provides the starting address and size of the hypercall @@ -846,7 +928,9 @@ blobs in userspace. When the guest writes the MSR, kvm copies one page of a blob (32- or 64-bit, depending on the vcpu mode) to guest memory. -struct kvm_xen_hvm_config { +:: + + struct kvm_xen_hvm_config { __u32 flags; __u32 msr; __u64 blob_addr_32; @@ -854,16 +938,17 @@ struct kvm_xen_hvm_config { __u8 blob_size_32; __u8 blob_size_64; __u8 pad2[30]; -}; + }; 4.29 KVM_GET_CLOCK +------------------ -Capability: KVM_CAP_ADJUST_CLOCK -Architectures: x86 -Type: vm ioctl -Parameters: struct kvm_clock_data (out) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_ADJUST_CLOCK +:Architectures: x86 +:Type: vm ioctl +:Parameters: struct kvm_clock_data (out) +:Returns: 0 on success, -1 on error Gets the current timestamp of kvmclock as seen by the current guest. In conjunction with KVM_SET_CLOCK, it is used to ensure monotonicity on scenarios @@ -880,47 +965,56 @@ with KVM_SET_CLOCK. KVM will try to make all VCPUs follow this clock, but the exact value read by each VCPU could differ, because the host TSC is not stable. -struct kvm_clock_data { +:: + + struct kvm_clock_data { __u64 clock; /* kvmclock current value */ __u32 flags; __u32 pad[9]; -}; + }; 4.30 KVM_SET_CLOCK +------------------ -Capability: KVM_CAP_ADJUST_CLOCK -Architectures: x86 -Type: vm ioctl -Parameters: struct kvm_clock_data (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_ADJUST_CLOCK +:Architectures: x86 +:Type: vm ioctl +:Parameters: struct kvm_clock_data (in) +:Returns: 0 on success, -1 on error Sets the current timestamp of kvmclock to the value specified in its parameter. In conjunction with KVM_GET_CLOCK, it is used to ensure monotonicity on scenarios such as migration. -struct kvm_clock_data { +:: + + struct kvm_clock_data { __u64 clock; /* kvmclock current value */ __u32 flags; __u32 pad[9]; -}; + }; 4.31 KVM_GET_VCPU_EVENTS +------------------------ -Capability: KVM_CAP_VCPU_EVENTS -Extended by: KVM_CAP_INTR_SHADOW -Architectures: x86, arm, arm64 -Type: vcpu ioctl -Parameters: struct kvm_vcpu_event (out) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_VCPU_EVENTS +:Extended by: KVM_CAP_INTR_SHADOW +:Architectures: x86, arm, arm64 +:Type: vcpu ioctl +:Parameters: struct kvm_vcpu_event (out) +:Returns: 0 on success, -1 on error X86: +^^^^ Gets currently pending exceptions, interrupts, and NMIs as well as related states of the vcpu. -struct kvm_vcpu_events { +:: + + struct kvm_vcpu_events { struct { __u8 injected; __u8 nr; @@ -951,7 +1045,7 @@ struct kvm_vcpu_events { __u8 reserved[27]; __u8 exception_has_payload; __u64 exception_payload; -}; + }; The following bits are defined in the flags field: @@ -967,6 +1061,7 @@ The following bits are defined in the flags field: KVM_CAP_EXCEPTION_PAYLOAD is enabled. ARM/ARM64: +^^^^^^^^^^ If the guest accesses a device that is being emulated by the host kernel in such a way that a real device would generate a physical SError, KVM may make @@ -1006,8 +1101,9 @@ It is not possible to read back a pending external abort (injected via KVM_SET_VCPU_EVENTS or otherwise) because such an exception is always delivered directly to the virtual CPU). +:: -struct kvm_vcpu_events { + struct kvm_vcpu_events { struct { __u8 serror_pending; __u8 serror_has_esr; @@ -1017,18 +1113,20 @@ struct kvm_vcpu_events { __u64 serror_esr; } exception; __u32 reserved[12]; -}; + }; 4.32 KVM_SET_VCPU_EVENTS +------------------------ -Capability: KVM_CAP_VCPU_EVENTS -Extended by: KVM_CAP_INTR_SHADOW -Architectures: x86, arm, arm64 -Type: vcpu ioctl -Parameters: struct kvm_vcpu_event (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_VCPU_EVENTS +:Extended by: KVM_CAP_INTR_SHADOW +:Architectures: x86, arm, arm64 +:Type: vcpu ioctl +:Parameters: struct kvm_vcpu_event (in) +:Returns: 0 on success, -1 on error X86: +^^^^ Set pending exceptions, interrupts, and NMIs as well as related states of the vcpu. @@ -1040,9 +1138,11 @@ from the update. These fields are nmi.pending, sipi_vector, smi.smm, smi.pending. Keep the corresponding bits in the flags field cleared to suppress overwriting the current in-kernel state. The bits are: -KVM_VCPUEVENT_VALID_NMI_PENDING - transfer nmi.pending to the kernel -KVM_VCPUEVENT_VALID_SIPI_VECTOR - transfer sipi_vector -KVM_VCPUEVENT_VALID_SMM - transfer the smi sub-struct. +=============================== ================================== +KVM_VCPUEVENT_VALID_NMI_PENDING transfer nmi.pending to the kernel +KVM_VCPUEVENT_VALID_SIPI_VECTOR transfer sipi_vector +KVM_VCPUEVENT_VALID_SMM transfer the smi sub-struct. +=============================== ================================== If KVM_CAP_INTR_SHADOW is available, KVM_VCPUEVENT_VALID_SHADOW can be set in the flags field to signal that interrupt.shadow contains a valid state and @@ -1056,6 +1156,7 @@ exception_has_payload, exception_payload, and exception.pending fields contain a valid state and shall be written into the VCPU. ARM/ARM64: +^^^^^^^^^^ User space may need to inject several types of events to the guest. @@ -1078,31 +1179,35 @@ See KVM_GET_VCPU_EVENTS for the data structure. 4.33 KVM_GET_DEBUGREGS +---------------------- -Capability: KVM_CAP_DEBUGREGS -Architectures: x86 -Type: vm ioctl -Parameters: struct kvm_debugregs (out) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_DEBUGREGS +:Architectures: x86 +:Type: vm ioctl +:Parameters: struct kvm_debugregs (out) +:Returns: 0 on success, -1 on error Reads debug registers from the vcpu. -struct kvm_debugregs { +:: + + struct kvm_debugregs { __u64 db[4]; __u64 dr6; __u64 dr7; __u64 flags; __u64 reserved[9]; -}; + }; 4.34 KVM_SET_DEBUGREGS +---------------------- -Capability: KVM_CAP_DEBUGREGS -Architectures: x86 -Type: vm ioctl -Parameters: struct kvm_debugregs (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_DEBUGREGS +:Architectures: x86 +:Type: vm ioctl +:Parameters: struct kvm_debugregs (in) +:Returns: 0 on success, -1 on error Writes debug registers into the vcpu. @@ -1111,24 +1216,27 @@ yet and must be cleared on entry. 4.35 KVM_SET_USER_MEMORY_REGION +------------------------------- + +:Capability: KVM_CAP_USER_MEMORY +:Architectures: all +:Type: vm ioctl +:Parameters: struct kvm_userspace_memory_region (in) +:Returns: 0 on success, -1 on error -Capability: KVM_CAP_USER_MEMORY -Architectures: all -Type: vm ioctl -Parameters: struct kvm_userspace_memory_region (in) -Returns: 0 on success, -1 on error +:: -struct kvm_userspace_memory_region { + struct kvm_userspace_memory_region { __u32 slot; __u32 flags; __u64 guest_phys_addr; __u64 memory_size; /* bytes */ __u64 userspace_addr; /* start of the userspace allocated memory */ -}; + }; -/* for kvm_memory_region::flags */ -#define KVM_MEM_LOG_DIRTY_PAGES (1UL << 0) -#define KVM_MEM_READONLY (1UL << 1) + /* for kvm_memory_region::flags */ + #define KVM_MEM_LOG_DIRTY_PAGES (1UL << 0) + #define KVM_MEM_READONLY (1UL << 1) This ioctl allows the user to create, modify or delete a guest physical memory slot. Bits 0-15 of "slot" specify the slot id and this value @@ -1174,12 +1282,13 @@ allocation and is deprecated. 4.36 KVM_SET_TSS_ADDR +--------------------- -Capability: KVM_CAP_SET_TSS_ADDR -Architectures: x86 -Type: vm ioctl -Parameters: unsigned long tss_address (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_SET_TSS_ADDR +:Architectures: x86 +:Type: vm ioctl +:Parameters: unsigned long tss_address (in) +:Returns: 0 on success, -1 on error This ioctl defines the physical address of a three-page region in the guest physical address space. The region must be within the first 4GB of the @@ -1193,21 +1302,24 @@ documentation when it pops into existence). 4.37 KVM_ENABLE_CAP +------------------- -Capability: KVM_CAP_ENABLE_CAP -Architectures: mips, ppc, s390 -Type: vcpu ioctl -Parameters: struct kvm_enable_cap (in) -Returns: 0 on success; -1 on error +:Capability: KVM_CAP_ENABLE_CAP +:Architectures: mips, ppc, s390 +:Type: vcpu ioctl +:Parameters: struct kvm_enable_cap (in) +:Returns: 0 on success; -1 on error -Capability: KVM_CAP_ENABLE_CAP_VM -Architectures: all -Type: vcpu ioctl -Parameters: struct kvm_enable_cap (in) -Returns: 0 on success; -1 on error +:Capability: KVM_CAP_ENABLE_CAP_VM +:Architectures: all +:Type: vcpu ioctl +:Parameters: struct kvm_enable_cap (in) +:Returns: 0 on success; -1 on error + +.. note:: -+Not all extensions are enabled by default. Using this ioctl the application -can enable an extension, making it available to the guest. + Not all extensions are enabled by default. Using this ioctl the application + can enable an extension, making it available to the guest. On systems that do not support this ioctl, it always fails. On systems that do support it, it only works for extensions that are supported for enablement. @@ -1215,76 +1327,91 @@ do support it, it only works for extensions that are supported for enablement. To check if a capability can be enabled, the KVM_CHECK_EXTENSION ioctl should be used. -struct kvm_enable_cap { +:: + + struct kvm_enable_cap { /* in */ __u32 cap; The capability that is supposed to get enabled. +:: + __u32 flags; A bitfield indicating future enhancements. Has to be 0 for now. +:: + __u64 args[4]; Arguments for enabling a feature. If a feature needs initial values to function properly, this is the place to put them. +:: + __u8 pad[64]; -}; + }; The vcpu ioctl should be used for vcpu-specific capabilities, the vm ioctl for vm-wide capabilities. 4.38 KVM_GET_MP_STATE +--------------------- -Capability: KVM_CAP_MP_STATE -Architectures: x86, s390, arm, arm64 -Type: vcpu ioctl -Parameters: struct kvm_mp_state (out) -Returns: 0 on success; -1 on error +:Capability: KVM_CAP_MP_STATE +:Architectures: x86, s390, arm, arm64 +:Type: vcpu ioctl +:Parameters: struct kvm_mp_state (out) +:Returns: 0 on success; -1 on error + +:: -struct kvm_mp_state { + struct kvm_mp_state { __u32 mp_state; -}; + }; Returns the vcpu's current "multiprocessing state" (though also valid on uniprocessor guests). Possible values are: - - KVM_MP_STATE_RUNNABLE: the vcpu is currently running [x86,arm/arm64] - - KVM_MP_STATE_UNINITIALIZED: the vcpu is an application processor (AP) + ========================== =============================================== + KVM_MP_STATE_RUNNABLE the vcpu is currently running [x86,arm/arm64] + KVM_MP_STATE_UNINITIALIZED the vcpu is an application processor (AP) which has not yet received an INIT signal [x86] - - KVM_MP_STATE_INIT_RECEIVED: the vcpu has received an INIT signal, and is + KVM_MP_STATE_INIT_RECEIVED the vcpu has received an INIT signal, and is now ready for a SIPI [x86] - - KVM_MP_STATE_HALTED: the vcpu has executed a HLT instruction and + KVM_MP_STATE_HALTED the vcpu has executed a HLT instruction and is waiting for an interrupt [x86] - - KVM_MP_STATE_SIPI_RECEIVED: the vcpu has just received a SIPI (vector + KVM_MP_STATE_SIPI_RECEIVED the vcpu has just received a SIPI (vector accessible via KVM_GET_VCPU_EVENTS) [x86] - - KVM_MP_STATE_STOPPED: the vcpu is stopped [s390,arm/arm64] - - KVM_MP_STATE_CHECK_STOP: the vcpu is in a special error state [s390] - - KVM_MP_STATE_OPERATING: the vcpu is operating (running or halted) + KVM_MP_STATE_STOPPED the vcpu is stopped [s390,arm/arm64] + KVM_MP_STATE_CHECK_STOP the vcpu is in a special error state [s390] + KVM_MP_STATE_OPERATING the vcpu is operating (running or halted) [s390] - - KVM_MP_STATE_LOAD: the vcpu is in a special load/startup state + KVM_MP_STATE_LOAD the vcpu is in a special load/startup state [s390] + ========================== =============================================== On x86, this ioctl is only useful after KVM_CREATE_IRQCHIP. Without an in-kernel irqchip, the multiprocessing state must be maintained by userspace on these architectures. For arm/arm64: +^^^^^^^^^^^^^^ The only states that are valid are KVM_MP_STATE_STOPPED and KVM_MP_STATE_RUNNABLE which reflect if the vcpu is paused or not. 4.39 KVM_SET_MP_STATE +--------------------- -Capability: KVM_CAP_MP_STATE -Architectures: x86, s390, arm, arm64 -Type: vcpu ioctl -Parameters: struct kvm_mp_state (in) -Returns: 0 on success; -1 on error +:Capability: KVM_CAP_MP_STATE +:Architectures: x86, s390, arm, arm64 +:Type: vcpu ioctl +:Parameters: struct kvm_mp_state (in) +:Returns: 0 on success; -1 on error Sets the vcpu's current "multiprocessing state"; see KVM_GET_MP_STATE for arguments. @@ -1294,17 +1421,19 @@ in-kernel irqchip, the multiprocessing state must be maintained by userspace on these architectures. For arm/arm64: +^^^^^^^^^^^^^^ The only states that are valid are KVM_MP_STATE_STOPPED and KVM_MP_STATE_RUNNABLE which reflect if the vcpu should be paused or not. 4.40 KVM_SET_IDENTITY_MAP_ADDR +------------------------------ -Capability: KVM_CAP_SET_IDENTITY_MAP_ADDR -Architectures: x86 -Type: vm ioctl -Parameters: unsigned long identity (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_SET_IDENTITY_MAP_ADDR +:Architectures: x86 +:Type: vm ioctl +:Parameters: unsigned long identity (in) +:Returns: 0 on success, -1 on error This ioctl defines the physical address of a one-page region in the guest physical address space. The region must be within the first 4GB of the @@ -1322,12 +1451,13 @@ documentation when it pops into existence). Fails if any VCPU has already been created. 4.41 KVM_SET_BOOT_CPU_ID +------------------------ -Capability: KVM_CAP_SET_BOOT_CPU_ID -Architectures: x86 -Type: vm ioctl -Parameters: unsigned long vcpu_id -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_SET_BOOT_CPU_ID +:Architectures: x86 +:Type: vm ioctl +:Parameters: unsigned long vcpu_id +:Returns: 0 on success, -1 on error Define which vcpu is the Bootstrap Processor (BSP). Values are the same as the vcpu id in KVM_CREATE_VCPU. If this ioctl is not called, the default @@ -1335,102 +1465,119 @@ is vcpu 0. 4.42 KVM_GET_XSAVE +------------------ -Capability: KVM_CAP_XSAVE -Architectures: x86 -Type: vcpu ioctl -Parameters: struct kvm_xsave (out) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_XSAVE +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: struct kvm_xsave (out) +:Returns: 0 on success, -1 on error + + +:: -struct kvm_xsave { + struct kvm_xsave { __u32 region[1024]; -}; + }; This ioctl would copy current vcpu's xsave struct to the userspace. 4.43 KVM_SET_XSAVE +------------------ -Capability: KVM_CAP_XSAVE -Architectures: x86 -Type: vcpu ioctl -Parameters: struct kvm_xsave (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_XSAVE +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: struct kvm_xsave (in) +:Returns: 0 on success, -1 on error + +:: -struct kvm_xsave { + + struct kvm_xsave { __u32 region[1024]; -}; + }; This ioctl would copy userspace's xsave struct to the kernel. 4.44 KVM_GET_XCRS +----------------- -Capability: KVM_CAP_XCRS -Architectures: x86 -Type: vcpu ioctl -Parameters: struct kvm_xcrs (out) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_XCRS +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: struct kvm_xcrs (out) +:Returns: 0 on success, -1 on error + +:: -struct kvm_xcr { + struct kvm_xcr { __u32 xcr; __u32 reserved; __u64 value; -}; + }; -struct kvm_xcrs { + struct kvm_xcrs { __u32 nr_xcrs; __u32 flags; struct kvm_xcr xcrs[KVM_MAX_XCRS]; __u64 padding[16]; -}; + }; This ioctl would copy current vcpu's xcrs to the userspace. 4.45 KVM_SET_XCRS +----------------- -Capability: KVM_CAP_XCRS -Architectures: x86 -Type: vcpu ioctl -Parameters: struct kvm_xcrs (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_XCRS +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: struct kvm_xcrs (in) +:Returns: 0 on success, -1 on error + +:: -struct kvm_xcr { + struct kvm_xcr { __u32 xcr; __u32 reserved; __u64 value; -}; + }; -struct kvm_xcrs { + struct kvm_xcrs { __u32 nr_xcrs; __u32 flags; struct kvm_xcr xcrs[KVM_MAX_XCRS]; __u64 padding[16]; -}; + }; This ioctl would set vcpu's xcr to the value userspace specified. 4.46 KVM_GET_SUPPORTED_CPUID +---------------------------- + +:Capability: KVM_CAP_EXT_CPUID +:Architectures: x86 +:Type: system ioctl +:Parameters: struct kvm_cpuid2 (in/out) +:Returns: 0 on success, -1 on error -Capability: KVM_CAP_EXT_CPUID -Architectures: x86 -Type: system ioctl -Parameters: struct kvm_cpuid2 (in/out) -Returns: 0 on success, -1 on error +:: -struct kvm_cpuid2 { + struct kvm_cpuid2 { __u32 nent; __u32 padding; struct kvm_cpuid_entry2 entries[0]; -}; + }; -#define KVM_CPUID_FLAG_SIGNIFCANT_INDEX BIT(0) -#define KVM_CPUID_FLAG_STATEFUL_FUNC BIT(1) -#define KVM_CPUID_FLAG_STATE_READ_NEXT BIT(2) + #define KVM_CPUID_FLAG_SIGNIFCANT_INDEX BIT(0) + #define KVM_CPUID_FLAG_STATEFUL_FUNC BIT(1) + #define KVM_CPUID_FLAG_STATE_READ_NEXT BIT(2) -struct kvm_cpuid_entry2 { + struct kvm_cpuid_entry2 { __u32 function; __u32 index; __u32 flags; @@ -1439,7 +1586,7 @@ struct kvm_cpuid_entry2 { __u32 ecx; __u32 edx; __u32 padding[3]; -}; + }; This ioctl returns x86 cpuid features which are supported by both the hardware and kvm in its default configuration. Userspace can use the @@ -1467,10 +1614,16 @@ with unknown or unsupported features masked out. Some features (for example, x2apic), may not be present in the host cpu, but are exposed by kvm if it can emulate them efficiently. The fields in each entry are defined as follows: - function: the eax value used to obtain the entry - index: the ecx value used to obtain the entry (for entries that are + function: + the eax value used to obtain the entry + + index: + the ecx value used to obtain the entry (for entries that are affected by ecx) - flags: an OR of zero or more of the following: + + flags: + an OR of zero or more of the following: + KVM_CPUID_FLAG_SIGNIFCANT_INDEX: if the index field is valid KVM_CPUID_FLAG_STATEFUL_FUNC: @@ -1480,12 +1633,14 @@ emulate them efficiently. The fields in each entry are defined as follows: KVM_CPUID_FLAG_STATE_READ_NEXT: for KVM_CPUID_FLAG_STATEFUL_FUNC entries, set if this entry is the first entry to be read by a cpu - eax, ebx, ecx, edx: the values returned by the cpuid instruction for + + eax, ebx, ecx, edx: + the values returned by the cpuid instruction for this function/index combination The TSC deadline timer feature (CPUID leaf 1, ecx[24]) is always returned as false, since the feature depends on KVM_CREATE_IRQCHIP for local APIC -support. Instead it is reported via +support. Instead it is reported via:: ioctl(KVM_CHECK_EXTENSION, KVM_CAP_TSC_DEADLINE_TIMER) @@ -1494,18 +1649,21 @@ feature in userspace, then you can enable the feature for KVM_SET_CPUID2. 4.47 KVM_PPC_GET_PVINFO +----------------------- + +:Capability: KVM_CAP_PPC_GET_PVINFO +:Architectures: ppc +:Type: vm ioctl +:Parameters: struct kvm_ppc_pvinfo (out) +:Returns: 0 on success, !0 on error -Capability: KVM_CAP_PPC_GET_PVINFO -Architectures: ppc -Type: vm ioctl -Parameters: struct kvm_ppc_pvinfo (out) -Returns: 0 on success, !0 on error +:: -struct kvm_ppc_pvinfo { + struct kvm_ppc_pvinfo { __u32 flags; __u32 hcall[4]; __u8 pad[108]; -}; + }; This ioctl fetches PV specific information that need to be passed to the guest using the device tree or other means from vm context. @@ -1515,33 +1673,39 @@ The hcall array defines 4 instructions that make up a hypercall. If any additional field gets added to this structure later on, a bit for that additional piece of information will be set in the flags bitmap. -The flags bitmap is defined as: +The flags bitmap is defined as:: /* the host supports the ePAPR idle hcall #define KVM_PPC_PVINFO_FLAGS_EV_IDLE (1<<0) 4.52 KVM_SET_GSI_ROUTING +------------------------ -Capability: KVM_CAP_IRQ_ROUTING -Architectures: x86 s390 arm arm64 -Type: vm ioctl -Parameters: struct kvm_irq_routing (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_IRQ_ROUTING +:Architectures: x86 s390 arm arm64 +:Type: vm ioctl +:Parameters: struct kvm_irq_routing (in) +:Returns: 0 on success, -1 on error Sets the GSI routing table entries, overwriting any previously set entries. On arm/arm64, GSI routing has the following limitation: + - GSI routing does not apply to KVM_IRQ_LINE but only to KVM_IRQFD. -struct kvm_irq_routing { +:: + + struct kvm_irq_routing { __u32 nr; __u32 flags; struct kvm_irq_routing_entry entries[0]; -}; + }; No flags are specified so far, the corresponding field must be set to zero. -struct kvm_irq_routing_entry { +:: + + struct kvm_irq_routing_entry { __u32 gsi; __u32 type; __u32 flags; @@ -1553,15 +1717,16 @@ struct kvm_irq_routing_entry { struct kvm_irq_routing_hv_sint hv_sint; __u32 pad[8]; } u; -}; + }; -/* gsi routing entry types */ -#define KVM_IRQ_ROUTING_IRQCHIP 1 -#define KVM_IRQ_ROUTING_MSI 2 -#define KVM_IRQ_ROUTING_S390_ADAPTER 3 -#define KVM_IRQ_ROUTING_HV_SINT 4 + /* gsi routing entry types */ + #define KVM_IRQ_ROUTING_IRQCHIP 1 + #define KVM_IRQ_ROUTING_MSI 2 + #define KVM_IRQ_ROUTING_S390_ADAPTER 3 + #define KVM_IRQ_ROUTING_HV_SINT 4 flags: + - KVM_MSI_VALID_DEVID: used along with KVM_IRQ_ROUTING_MSI routing entry type, specifies that the devid field contains a valid value. The per-VM KVM_CAP_MSI_DEVID capability advertises the requirement to provide @@ -1569,12 +1734,14 @@ flags: never set the KVM_MSI_VALID_DEVID flag as the ioctl might fail. - zero otherwise -struct kvm_irq_routing_irqchip { +:: + + struct kvm_irq_routing_irqchip { __u32 irqchip; __u32 pin; -}; + }; -struct kvm_irq_routing_msi { + struct kvm_irq_routing_msi { __u32 address_lo; __u32 address_hi; __u32 data; @@ -1582,7 +1749,7 @@ struct kvm_irq_routing_msi { __u32 pad; __u32 devid; }; -}; + }; If KVM_MSI_VALID_DEVID is set, devid contains a unique device identifier for the device that wrote the MSI message. For PCI, this is usually a @@ -1593,39 +1760,43 @@ feature of KVM_CAP_X2APIC_API capability is enabled. If it is enabled, address_hi bits 31-8 provide bits 31-8 of the destination id. Bits 7-0 of address_hi must be zero. -struct kvm_irq_routing_s390_adapter { +:: + + struct kvm_irq_routing_s390_adapter { __u64 ind_addr; __u64 summary_addr; __u64 ind_offset; __u32 summary_offset; __u32 adapter_id; -}; + }; -struct kvm_irq_routing_hv_sint { + struct kvm_irq_routing_hv_sint { __u32 vcpu; __u32 sint; -}; + }; 4.55 KVM_SET_TSC_KHZ +-------------------- -Capability: KVM_CAP_TSC_CONTROL -Architectures: x86 -Type: vcpu ioctl -Parameters: virtual tsc_khz -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_TSC_CONTROL +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: virtual tsc_khz +:Returns: 0 on success, -1 on error Specifies the tsc frequency for the virtual machine. The unit of the frequency is KHz. 4.56 KVM_GET_TSC_KHZ +-------------------- -Capability: KVM_CAP_GET_TSC_KHZ -Architectures: x86 -Type: vcpu ioctl -Parameters: none -Returns: virtual tsc-khz on success, negative value on error +:Capability: KVM_CAP_GET_TSC_KHZ +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: none +:Returns: virtual tsc-khz on success, negative value on error Returns the tsc frequency of the guest. The unit of the return value is KHz. If the host has unstable tsc this ioctl returns -EIO instead as an @@ -1633,17 +1804,20 @@ error. 4.57 KVM_GET_LAPIC +------------------ -Capability: KVM_CAP_IRQCHIP -Architectures: x86 -Type: vcpu ioctl -Parameters: struct kvm_lapic_state (out) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_IRQCHIP +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: struct kvm_lapic_state (out) +:Returns: 0 on success, -1 on error -#define KVM_APIC_REG_SIZE 0x400 -struct kvm_lapic_state { +:: + + #define KVM_APIC_REG_SIZE 0x400 + struct kvm_lapic_state { char regs[KVM_APIC_REG_SIZE]; -}; + }; Reads the Local APIC registers and copies them into the input argument. The data format and layout are the same as documented in the architecture manual. @@ -1661,17 +1835,20 @@ always uses xAPIC format. 4.58 KVM_SET_LAPIC +------------------ -Capability: KVM_CAP_IRQCHIP -Architectures: x86 -Type: vcpu ioctl -Parameters: struct kvm_lapic_state (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_IRQCHIP +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: struct kvm_lapic_state (in) +:Returns: 0 on success, -1 on error -#define KVM_APIC_REG_SIZE 0x400 -struct kvm_lapic_state { +:: + + #define KVM_APIC_REG_SIZE 0x400 + struct kvm_lapic_state { char regs[KVM_APIC_REG_SIZE]; -}; + }; Copies the input argument into the Local APIC registers. The data format and layout are the same as documented in the architecture manual. @@ -1682,35 +1859,38 @@ See the note in KVM_GET_LAPIC. 4.59 KVM_IOEVENTFD +------------------ -Capability: KVM_CAP_IOEVENTFD -Architectures: all -Type: vm ioctl -Parameters: struct kvm_ioeventfd (in) -Returns: 0 on success, !0 on error +:Capability: KVM_CAP_IOEVENTFD +:Architectures: all +:Type: vm ioctl +:Parameters: struct kvm_ioeventfd (in) +:Returns: 0 on success, !0 on error This ioctl attaches or detaches an ioeventfd to a legal pio/mmio address within the guest. A guest write in the registered address will signal the provided event instead of triggering an exit. -struct kvm_ioeventfd { +:: + + struct kvm_ioeventfd { __u64 datamatch; __u64 addr; /* legal pio/mmio address */ __u32 len; /* 0, 1, 2, 4, or 8 bytes */ __s32 fd; __u32 flags; __u8 pad[36]; -}; + }; For the special case of virtio-ccw devices on s390, the ioevent is matched to a subchannel/virtqueue tuple instead. -The following flags are defined: +The following flags are defined:: -#define KVM_IOEVENTFD_FLAG_DATAMATCH (1 << kvm_ioeventfd_flag_nr_datamatch) -#define KVM_IOEVENTFD_FLAG_PIO (1 << kvm_ioeventfd_flag_nr_pio) -#define KVM_IOEVENTFD_FLAG_DEASSIGN (1 << kvm_ioeventfd_flag_nr_deassign) -#define KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY \ + #define KVM_IOEVENTFD_FLAG_DATAMATCH (1 << kvm_ioeventfd_flag_nr_datamatch) + #define KVM_IOEVENTFD_FLAG_PIO (1 << kvm_ioeventfd_flag_nr_pio) + #define KVM_IOEVENTFD_FLAG_DEASSIGN (1 << kvm_ioeventfd_flag_nr_deassign) + #define KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY \ (1 << kvm_ioeventfd_flag_nr_virtio_ccw_notify) If datamatch flag is set, the event will be signaled only if the written value @@ -1725,17 +1905,20 @@ The speedup may only apply to specific architectures, but the ioeventfd will work anyway. 4.60 KVM_DIRTY_TLB +------------------ -Capability: KVM_CAP_SW_TLB -Architectures: ppc -Type: vcpu ioctl -Parameters: struct kvm_dirty_tlb (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_SW_TLB +:Architectures: ppc +:Type: vcpu ioctl +:Parameters: struct kvm_dirty_tlb (in) +:Returns: 0 on success, -1 on error + +:: -struct kvm_dirty_tlb { + struct kvm_dirty_tlb { __u64 bitmap; __u32 num_dirty; -}; + }; This must be called whenever userspace has changed an entry in the shared TLB, prior to calling KVM_RUN on the associated vcpu. @@ -1758,23 +1941,26 @@ be set to the number of set bits in the bitmap. 4.62 KVM_CREATE_SPAPR_TCE +------------------------- -Capability: KVM_CAP_SPAPR_TCE -Architectures: powerpc -Type: vm ioctl -Parameters: struct kvm_create_spapr_tce (in) -Returns: file descriptor for manipulating the created TCE table +:Capability: KVM_CAP_SPAPR_TCE +:Architectures: powerpc +:Type: vm ioctl +:Parameters: struct kvm_create_spapr_tce (in) +:Returns: file descriptor for manipulating the created TCE table This creates a virtual TCE (translation control entry) table, which is an IOMMU for PAPR-style virtual I/O. It is used to translate logical addresses used in virtual I/O into guest physical addresses, and provides a scatter/gather capability for PAPR virtual I/O. -/* for KVM_CAP_SPAPR_TCE */ -struct kvm_create_spapr_tce { +:: + + /* for KVM_CAP_SPAPR_TCE */ + struct kvm_create_spapr_tce { __u64 liobn; __u32 window_size; -}; + }; The liobn field gives the logical IO bus number for which to create a TCE table. The window_size field specifies the size of the DMA window @@ -1794,12 +1980,13 @@ circumstances. 4.63 KVM_ALLOCATE_RMA +--------------------- -Capability: KVM_CAP_PPC_RMA -Architectures: powerpc -Type: vm ioctl -Parameters: struct kvm_allocate_rma (out) -Returns: file descriptor for mapping the allocated RMA +:Capability: KVM_CAP_PPC_RMA +:Architectures: powerpc +:Type: vm ioctl +:Parameters: struct kvm_allocate_rma (out) +:Returns: file descriptor for mapping the allocated RMA This allocates a Real Mode Area (RMA) from the pool allocated at boot time by the kernel. An RMA is a physically-contiguous, aligned region @@ -1808,10 +1995,12 @@ will be accessed by real-mode (MMU off) accesses in a KVM guest. POWER processors support a set of sizes for the RMA that usually includes 64MB, 128MB, 256MB and some larger powers of two. -/* for KVM_ALLOCATE_RMA */ -struct kvm_allocate_rma { +:: + + /* for KVM_ALLOCATE_RMA */ + struct kvm_allocate_rma { __u64 rma_size; -}; + }; The return value is a file descriptor which can be passed to mmap(2) to map the allocated RMA into userspace. The mapped area can then be @@ -1827,12 +2016,13 @@ because it supports the Virtual RMA (VRMA) facility. 4.64 KVM_NMI +------------ -Capability: KVM_CAP_USER_NMI -Architectures: x86 -Type: vcpu ioctl -Parameters: none -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_USER_NMI +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: none +:Returns: 0 on success, -1 on error Queues an NMI on the thread's vcpu. Note this is well defined only when KVM_CREATE_IRQCHIP has not been called, since this is an interface @@ -1853,14 +2043,16 @@ debugging. 4.65 KVM_S390_UCAS_MAP +---------------------- -Capability: KVM_CAP_S390_UCONTROL -Architectures: s390 -Type: vcpu ioctl -Parameters: struct kvm_s390_ucas_mapping (in) -Returns: 0 in case of success +:Capability: KVM_CAP_S390_UCONTROL +:Architectures: s390 +:Type: vcpu ioctl +:Parameters: struct kvm_s390_ucas_mapping (in) +:Returns: 0 in case of success + +The parameter is defined like this:: -The parameter is defined like this: struct kvm_s390_ucas_mapping { __u64 user_addr; __u64 vcpu_addr; @@ -1873,14 +2065,16 @@ be aligned by 1 megabyte. 4.66 KVM_S390_UCAS_UNMAP +------------------------ -Capability: KVM_CAP_S390_UCONTROL -Architectures: s390 -Type: vcpu ioctl -Parameters: struct kvm_s390_ucas_mapping (in) -Returns: 0 in case of success +:Capability: KVM_CAP_S390_UCONTROL +:Architectures: s390 +:Type: vcpu ioctl +:Parameters: struct kvm_s390_ucas_mapping (in) +:Returns: 0 in case of success + +The parameter is defined like this:: -The parameter is defined like this: struct kvm_s390_ucas_mapping { __u64 user_addr; __u64 vcpu_addr; @@ -1893,12 +2087,13 @@ All parameters need to be aligned by 1 megabyte. 4.67 KVM_S390_VCPU_FAULT +------------------------ -Capability: KVM_CAP_S390_UCONTROL -Architectures: s390 -Type: vcpu ioctl -Parameters: vcpu absolute address (in) -Returns: 0 in case of success +:Capability: KVM_CAP_S390_UCONTROL +:Architectures: s390 +:Type: vcpu ioctl +:Parameters: vcpu absolute address (in) +:Returns: 0 in case of success This call creates a page table entry on the virtual cpu's address space (for user controlled virtual machines) or the virtual machine's address @@ -1910,23 +2105,31 @@ prior to calling the KVM_RUN ioctl. 4.68 KVM_SET_ONE_REG +-------------------- + +:Capability: KVM_CAP_ONE_REG +:Architectures: all +:Type: vcpu ioctl +:Parameters: struct kvm_one_reg (in) +:Returns: 0 on success, negative value on failure -Capability: KVM_CAP_ONE_REG -Architectures: all -Type: vcpu ioctl -Parameters: struct kvm_one_reg (in) -Returns: 0 on success, negative value on failure Errors: -  ENOENT:   no such register -  EINVAL:   invalid register ID, or no such register -  EPERM:    (arm64) register access not allowed before vcpu finalization + + ====== ============================================================ +  ENOENT   no such register +  EINVAL   invalid register ID, or no such register +  EPERM    (arm64) register access not allowed before vcpu finalization + ====== ============================================================ + (These error codes are indicative only: do not rely on a specific error code being returned in a specific situation.) -struct kvm_one_reg { +:: + + struct kvm_one_reg { __u64 id; __u64 addr; -}; + }; Using this ioctl, a single vcpu register can be set to a specific value defined by user space with the passed in struct kvm_one_reg, where id @@ -1936,217 +2139,226 @@ and architecture specific registers. Each have their own range of operation and their own constants and width. To keep track of the implemented registers, find a list below: - Arch | Register | Width (bits) - | | - PPC | KVM_REG_PPC_HIOR | 64 - PPC | KVM_REG_PPC_IAC1 | 64 - PPC | KVM_REG_PPC_IAC2 | 64 - PPC | KVM_REG_PPC_IAC3 | 64 - PPC | KVM_REG_PPC_IAC4 | 64 - PPC | KVM_REG_PPC_DAC1 | 64 - PPC | KVM_REG_PPC_DAC2 | 64 - PPC | KVM_REG_PPC_DABR | 64 - PPC | KVM_REG_PPC_DSCR | 64 - PPC | KVM_REG_PPC_PURR | 64 - PPC | KVM_REG_PPC_SPURR | 64 - PPC | KVM_REG_PPC_DAR | 64 - PPC | KVM_REG_PPC_DSISR | 32 - PPC | KVM_REG_PPC_AMR | 64 - PPC | KVM_REG_PPC_UAMOR | 64 - PPC | KVM_REG_PPC_MMCR0 | 64 - PPC | KVM_REG_PPC_MMCR1 | 64 - PPC | KVM_REG_PPC_MMCRA | 64 - PPC | KVM_REG_PPC_MMCR2 | 64 - PPC | KVM_REG_PPC_MMCRS | 64 - PPC | KVM_REG_PPC_SIAR | 64 - PPC | KVM_REG_PPC_SDAR | 64 - PPC | KVM_REG_PPC_SIER | 64 - PPC | KVM_REG_PPC_PMC1 | 32 - PPC | KVM_REG_PPC_PMC2 | 32 - PPC | KVM_REG_PPC_PMC3 | 32 - PPC | KVM_REG_PPC_PMC4 | 32 - PPC | KVM_REG_PPC_PMC5 | 32 - PPC | KVM_REG_PPC_PMC6 | 32 - PPC | KVM_REG_PPC_PMC7 | 32 - PPC | KVM_REG_PPC_PMC8 | 32 - PPC | KVM_REG_PPC_FPR0 | 64 - ... - PPC | KVM_REG_PPC_FPR31 | 64 - PPC | KVM_REG_PPC_VR0 | 128 - ... - PPC | KVM_REG_PPC_VR31 | 128 - PPC | KVM_REG_PPC_VSR0 | 128 - ... - PPC | KVM_REG_PPC_VSR31 | 128 - PPC | KVM_REG_PPC_FPSCR | 64 - PPC | KVM_REG_PPC_VSCR | 32 - PPC | KVM_REG_PPC_VPA_ADDR | 64 - PPC | KVM_REG_PPC_VPA_SLB | 128 - PPC | KVM_REG_PPC_VPA_DTL | 128 - PPC | KVM_REG_PPC_EPCR | 32 - PPC | KVM_REG_PPC_EPR | 32 - PPC | KVM_REG_PPC_TCR | 32 - PPC | KVM_REG_PPC_TSR | 32 - PPC | KVM_REG_PPC_OR_TSR | 32 - PPC | KVM_REG_PPC_CLEAR_TSR | 32 - PPC | KVM_REG_PPC_MAS0 | 32 - PPC | KVM_REG_PPC_MAS1 | 32 - PPC | KVM_REG_PPC_MAS2 | 64 - PPC | KVM_REG_PPC_MAS7_3 | 64 - PPC | KVM_REG_PPC_MAS4 | 32 - PPC | KVM_REG_PPC_MAS6 | 32 - PPC | KVM_REG_PPC_MMUCFG | 32 - PPC | KVM_REG_PPC_TLB0CFG | 32 - PPC | KVM_REG_PPC_TLB1CFG | 32 - PPC | KVM_REG_PPC_TLB2CFG | 32 - PPC | KVM_REG_PPC_TLB3CFG | 32 - PPC | KVM_REG_PPC_TLB0PS | 32 - PPC | KVM_REG_PPC_TLB1PS | 32 - PPC | KVM_REG_PPC_TLB2PS | 32 - PPC | KVM_REG_PPC_TLB3PS | 32 - PPC | KVM_REG_PPC_EPTCFG | 32 - PPC | KVM_REG_PPC_ICP_STATE | 64 - PPC | KVM_REG_PPC_VP_STATE | 128 - PPC | KVM_REG_PPC_TB_OFFSET | 64 - PPC | KVM_REG_PPC_SPMC1 | 32 - PPC | KVM_REG_PPC_SPMC2 | 32 - PPC | KVM_REG_PPC_IAMR | 64 - PPC | KVM_REG_PPC_TFHAR | 64 - PPC | KVM_REG_PPC_TFIAR | 64 - PPC | KVM_REG_PPC_TEXASR | 64 - PPC | KVM_REG_PPC_FSCR | 64 - PPC | KVM_REG_PPC_PSPB | 32 - PPC | KVM_REG_PPC_EBBHR | 64 - PPC | KVM_REG_PPC_EBBRR | 64 - PPC | KVM_REG_PPC_BESCR | 64 - PPC | KVM_REG_PPC_TAR | 64 - PPC | KVM_REG_PPC_DPDES | 64 - PPC | KVM_REG_PPC_DAWR | 64 - PPC | KVM_REG_PPC_DAWRX | 64 - PPC | KVM_REG_PPC_CIABR | 64 - PPC | KVM_REG_PPC_IC | 64 - PPC | KVM_REG_PPC_VTB | 64 - PPC | KVM_REG_PPC_CSIGR | 64 - PPC | KVM_REG_PPC_TACR | 64 - PPC | KVM_REG_PPC_TCSCR | 64 - PPC | KVM_REG_PPC_PID | 64 - PPC | KVM_REG_PPC_ACOP | 64 - PPC | KVM_REG_PPC_VRSAVE | 32 - PPC | KVM_REG_PPC_LPCR | 32 - PPC | KVM_REG_PPC_LPCR_64 | 64 - PPC | KVM_REG_PPC_PPR | 64 - PPC | KVM_REG_PPC_ARCH_COMPAT | 32 - PPC | KVM_REG_PPC_DABRX | 32 - PPC | KVM_REG_PPC_WORT | 64 - PPC | KVM_REG_PPC_SPRG9 | 64 - PPC | KVM_REG_PPC_DBSR | 32 - PPC | KVM_REG_PPC_TIDR | 64 - PPC | KVM_REG_PPC_PSSCR | 64 - PPC | KVM_REG_PPC_DEC_EXPIRY | 64 - PPC | KVM_REG_PPC_PTCR | 64 - PPC | KVM_REG_PPC_TM_GPR0 | 64 - ... - PPC | KVM_REG_PPC_TM_GPR31 | 64 - PPC | KVM_REG_PPC_TM_VSR0 | 128 - ... - PPC | KVM_REG_PPC_TM_VSR63 | 128 - PPC | KVM_REG_PPC_TM_CR | 64 - PPC | KVM_REG_PPC_TM_LR | 64 - PPC | KVM_REG_PPC_TM_CTR | 64 - PPC | KVM_REG_PPC_TM_FPSCR | 64 - PPC | KVM_REG_PPC_TM_AMR | 64 - PPC | KVM_REG_PPC_TM_PPR | 64 - PPC | KVM_REG_PPC_TM_VRSAVE | 64 - PPC | KVM_REG_PPC_TM_VSCR | 32 - PPC | KVM_REG_PPC_TM_DSCR | 64 - PPC | KVM_REG_PPC_TM_TAR | 64 - PPC | KVM_REG_PPC_TM_XER | 64 - | | - MIPS | KVM_REG_MIPS_R0 | 64 - ... - MIPS | KVM_REG_MIPS_R31 | 64 - MIPS | KVM_REG_MIPS_HI | 64 - MIPS | KVM_REG_MIPS_LO | 64 - MIPS | KVM_REG_MIPS_PC | 64 - MIPS | KVM_REG_MIPS_CP0_INDEX | 32 - MIPS | KVM_REG_MIPS_CP0_ENTRYLO0 | 64 - MIPS | KVM_REG_MIPS_CP0_ENTRYLO1 | 64 - MIPS | KVM_REG_MIPS_CP0_CONTEXT | 64 - MIPS | KVM_REG_MIPS_CP0_CONTEXTCONFIG| 32 - MIPS | KVM_REG_MIPS_CP0_USERLOCAL | 64 - MIPS | KVM_REG_MIPS_CP0_XCONTEXTCONFIG| 64 - MIPS | KVM_REG_MIPS_CP0_PAGEMASK | 32 - MIPS | KVM_REG_MIPS_CP0_PAGEGRAIN | 32 - MIPS | KVM_REG_MIPS_CP0_SEGCTL0 | 64 - MIPS | KVM_REG_MIPS_CP0_SEGCTL1 | 64 - MIPS | KVM_REG_MIPS_CP0_SEGCTL2 | 64 - MIPS | KVM_REG_MIPS_CP0_PWBASE | 64 - MIPS | KVM_REG_MIPS_CP0_PWFIELD | 64 - MIPS | KVM_REG_MIPS_CP0_PWSIZE | 64 - MIPS | KVM_REG_MIPS_CP0_WIRED | 32 - MIPS | KVM_REG_MIPS_CP0_PWCTL | 32 - MIPS | KVM_REG_MIPS_CP0_HWRENA | 32 - MIPS | KVM_REG_MIPS_CP0_BADVADDR | 64 - MIPS | KVM_REG_MIPS_CP0_BADINSTR | 32 - MIPS | KVM_REG_MIPS_CP0_BADINSTRP | 32 - MIPS | KVM_REG_MIPS_CP0_COUNT | 32 - MIPS | KVM_REG_MIPS_CP0_ENTRYHI | 64 - MIPS | KVM_REG_MIPS_CP0_COMPARE | 32 - MIPS | KVM_REG_MIPS_CP0_STATUS | 32 - MIPS | KVM_REG_MIPS_CP0_INTCTL | 32 - MIPS | KVM_REG_MIPS_CP0_CAUSE | 32 - MIPS | KVM_REG_MIPS_CP0_EPC | 64 - MIPS | KVM_REG_MIPS_CP0_PRID | 32 - MIPS | KVM_REG_MIPS_CP0_EBASE | 64 - MIPS | KVM_REG_MIPS_CP0_CONFIG | 32 - MIPS | KVM_REG_MIPS_CP0_CONFIG1 | 32 - MIPS | KVM_REG_MIPS_CP0_CONFIG2 | 32 - MIPS | KVM_REG_MIPS_CP0_CONFIG3 | 32 - MIPS | KVM_REG_MIPS_CP0_CONFIG4 | 32 - MIPS | KVM_REG_MIPS_CP0_CONFIG5 | 32 - MIPS | KVM_REG_MIPS_CP0_CONFIG7 | 32 - MIPS | KVM_REG_MIPS_CP0_XCONTEXT | 64 - MIPS | KVM_REG_MIPS_CP0_ERROREPC | 64 - MIPS | KVM_REG_MIPS_CP0_KSCRATCH1 | 64 - MIPS | KVM_REG_MIPS_CP0_KSCRATCH2 | 64 - MIPS | KVM_REG_MIPS_CP0_KSCRATCH3 | 64 - MIPS | KVM_REG_MIPS_CP0_KSCRATCH4 | 64 - MIPS | KVM_REG_MIPS_CP0_KSCRATCH5 | 64 - MIPS | KVM_REG_MIPS_CP0_KSCRATCH6 | 64 - MIPS | KVM_REG_MIPS_CP0_MAAR(0..63) | 64 - MIPS | KVM_REG_MIPS_COUNT_CTL | 64 - MIPS | KVM_REG_MIPS_COUNT_RESUME | 64 - MIPS | KVM_REG_MIPS_COUNT_HZ | 64 - MIPS | KVM_REG_MIPS_FPR_32(0..31) | 32 - MIPS | KVM_REG_MIPS_FPR_64(0..31) | 64 - MIPS | KVM_REG_MIPS_VEC_128(0..31) | 128 - MIPS | KVM_REG_MIPS_FCR_IR | 32 - MIPS | KVM_REG_MIPS_FCR_CSR | 32 - MIPS | KVM_REG_MIPS_MSA_IR | 32 - MIPS | KVM_REG_MIPS_MSA_CSR | 32 + ======= =============================== ============ + Arch Register Width (bits) + ======= =============================== ============ + PPC KVM_REG_PPC_HIOR 64 + PPC KVM_REG_PPC_IAC1 64 + PPC KVM_REG_PPC_IAC2 64 + PPC KVM_REG_PPC_IAC3 64 + PPC KVM_REG_PPC_IAC4 64 + PPC KVM_REG_PPC_DAC1 64 + PPC KVM_REG_PPC_DAC2 64 + PPC KVM_REG_PPC_DABR 64 + PPC KVM_REG_PPC_DSCR 64 + PPC KVM_REG_PPC_PURR 64 + PPC KVM_REG_PPC_SPURR 64 + PPC KVM_REG_PPC_DAR 64 + PPC KVM_REG_PPC_DSISR 32 + PPC KVM_REG_PPC_AMR 64 + PPC KVM_REG_PPC_UAMOR 64 + PPC KVM_REG_PPC_MMCR0 64 + PPC KVM_REG_PPC_MMCR1 64 + PPC KVM_REG_PPC_MMCRA 64 + PPC KVM_REG_PPC_MMCR2 64 + PPC KVM_REG_PPC_MMCRS 64 + PPC KVM_REG_PPC_SIAR 64 + PPC KVM_REG_PPC_SDAR 64 + PPC KVM_REG_PPC_SIER 64 + PPC KVM_REG_PPC_PMC1 32 + PPC KVM_REG_PPC_PMC2 32 + PPC KVM_REG_PPC_PMC3 32 + PPC KVM_REG_PPC_PMC4 32 + PPC KVM_REG_PPC_PMC5 32 + PPC KVM_REG_PPC_PMC6 32 + PPC KVM_REG_PPC_PMC7 32 + PPC KVM_REG_PPC_PMC8 32 + PPC KVM_REG_PPC_FPR0 64 + ... + PPC KVM_REG_PPC_FPR31 64 + PPC KVM_REG_PPC_VR0 128 + ... + PPC KVM_REG_PPC_VR31 128 + PPC KVM_REG_PPC_VSR0 128 + ... + PPC KVM_REG_PPC_VSR31 128 + PPC KVM_REG_PPC_FPSCR 64 + PPC KVM_REG_PPC_VSCR 32 + PPC KVM_REG_PPC_VPA_ADDR 64 + PPC KVM_REG_PPC_VPA_SLB 128 + PPC KVM_REG_PPC_VPA_DTL 128 + PPC KVM_REG_PPC_EPCR 32 + PPC KVM_REG_PPC_EPR 32 + PPC KVM_REG_PPC_TCR 32 + PPC KVM_REG_PPC_TSR 32 + PPC KVM_REG_PPC_OR_TSR 32 + PPC KVM_REG_PPC_CLEAR_TSR 32 + PPC KVM_REG_PPC_MAS0 32 + PPC KVM_REG_PPC_MAS1 32 + PPC KVM_REG_PPC_MAS2 64 + PPC KVM_REG_PPC_MAS7_3 64 + PPC KVM_REG_PPC_MAS4 32 + PPC KVM_REG_PPC_MAS6 32 + PPC KVM_REG_PPC_MMUCFG 32 + PPC KVM_REG_PPC_TLB0CFG 32 + PPC KVM_REG_PPC_TLB1CFG 32 + PPC KVM_REG_PPC_TLB2CFG 32 + PPC KVM_REG_PPC_TLB3CFG 32 + PPC KVM_REG_PPC_TLB0PS 32 + PPC KVM_REG_PPC_TLB1PS 32 + PPC KVM_REG_PPC_TLB2PS 32 + PPC KVM_REG_PPC_TLB3PS 32 + PPC KVM_REG_PPC_EPTCFG 32 + PPC KVM_REG_PPC_ICP_STATE 64 + PPC KVM_REG_PPC_VP_STATE 128 + PPC KVM_REG_PPC_TB_OFFSET 64 + PPC KVM_REG_PPC_SPMC1 32 + PPC KVM_REG_PPC_SPMC2 32 + PPC KVM_REG_PPC_IAMR 64 + PPC KVM_REG_PPC_TFHAR 64 + PPC KVM_REG_PPC_TFIAR 64 + PPC KVM_REG_PPC_TEXASR 64 + PPC KVM_REG_PPC_FSCR 64 + PPC KVM_REG_PPC_PSPB 32 + PPC KVM_REG_PPC_EBBHR 64 + PPC KVM_REG_PPC_EBBRR 64 + PPC KVM_REG_PPC_BESCR 64 + PPC KVM_REG_PPC_TAR 64 + PPC KVM_REG_PPC_DPDES 64 + PPC KVM_REG_PPC_DAWR 64 + PPC KVM_REG_PPC_DAWRX 64 + PPC KVM_REG_PPC_CIABR 64 + PPC KVM_REG_PPC_IC 64 + PPC KVM_REG_PPC_VTB 64 + PPC KVM_REG_PPC_CSIGR 64 + PPC KVM_REG_PPC_TACR 64 + PPC KVM_REG_PPC_TCSCR 64 + PPC KVM_REG_PPC_PID 64 + PPC KVM_REG_PPC_ACOP 64 + PPC KVM_REG_PPC_VRSAVE 32 + PPC KVM_REG_PPC_LPCR 32 + PPC KVM_REG_PPC_LPCR_64 64 + PPC KVM_REG_PPC_PPR 64 + PPC KVM_REG_PPC_ARCH_COMPAT 32 + PPC KVM_REG_PPC_DABRX 32 + PPC KVM_REG_PPC_WORT 64 + PPC KVM_REG_PPC_SPRG9 64 + PPC KVM_REG_PPC_DBSR 32 + PPC KVM_REG_PPC_TIDR 64 + PPC KVM_REG_PPC_PSSCR 64 + PPC KVM_REG_PPC_DEC_EXPIRY 64 + PPC KVM_REG_PPC_PTCR 64 + PPC KVM_REG_PPC_TM_GPR0 64 + ... + PPC KVM_REG_PPC_TM_GPR31 64 + PPC KVM_REG_PPC_TM_VSR0 128 + ... + PPC KVM_REG_PPC_TM_VSR63 128 + PPC KVM_REG_PPC_TM_CR 64 + PPC KVM_REG_PPC_TM_LR 64 + PPC KVM_REG_PPC_TM_CTR 64 + PPC KVM_REG_PPC_TM_FPSCR 64 + PPC KVM_REG_PPC_TM_AMR 64 + PPC KVM_REG_PPC_TM_PPR 64 + PPC KVM_REG_PPC_TM_VRSAVE 64 + PPC KVM_REG_PPC_TM_VSCR 32 + PPC KVM_REG_PPC_TM_DSCR 64 + PPC KVM_REG_PPC_TM_TAR 64 + PPC KVM_REG_PPC_TM_XER 64 + + MIPS KVM_REG_MIPS_R0 64 + ... + MIPS KVM_REG_MIPS_R31 64 + MIPS KVM_REG_MIPS_HI 64 + MIPS KVM_REG_MIPS_LO 64 + MIPS KVM_REG_MIPS_PC 64 + MIPS KVM_REG_MIPS_CP0_INDEX 32 + MIPS KVM_REG_MIPS_CP0_ENTRYLO0 64 + MIPS KVM_REG_MIPS_CP0_ENTRYLO1 64 + MIPS KVM_REG_MIPS_CP0_CONTEXT 64 + MIPS KVM_REG_MIPS_CP0_CONTEXTCONFIG 32 + MIPS KVM_REG_MIPS_CP0_USERLOCAL 64 + MIPS KVM_REG_MIPS_CP0_XCONTEXTCONFIG 64 + MIPS KVM_REG_MIPS_CP0_PAGEMASK 32 + MIPS KVM_REG_MIPS_CP0_PAGEGRAIN 32 + MIPS KVM_REG_MIPS_CP0_SEGCTL0 64 + MIPS KVM_REG_MIPS_CP0_SEGCTL1 64 + MIPS KVM_REG_MIPS_CP0_SEGCTL2 64 + MIPS KVM_REG_MIPS_CP0_PWBASE 64 + MIPS KVM_REG_MIPS_CP0_PWFIELD 64 + MIPS KVM_REG_MIPS_CP0_PWSIZE 64 + MIPS KVM_REG_MIPS_CP0_WIRED 32 + MIPS KVM_REG_MIPS_CP0_PWCTL 32 + MIPS KVM_REG_MIPS_CP0_HWRENA 32 + MIPS KVM_REG_MIPS_CP0_BADVADDR 64 + MIPS KVM_REG_MIPS_CP0_BADINSTR 32 + MIPS KVM_REG_MIPS_CP0_BADINSTRP 32 + MIPS KVM_REG_MIPS_CP0_COUNT 32 + MIPS KVM_REG_MIPS_CP0_ENTRYHI 64 + MIPS KVM_REG_MIPS_CP0_COMPARE 32 + MIPS KVM_REG_MIPS_CP0_STATUS 32 + MIPS KVM_REG_MIPS_CP0_INTCTL 32 + MIPS KVM_REG_MIPS_CP0_CAUSE 32 + MIPS KVM_REG_MIPS_CP0_EPC 64 + MIPS KVM_REG_MIPS_CP0_PRID 32 + MIPS KVM_REG_MIPS_CP0_EBASE 64 + MIPS KVM_REG_MIPS_CP0_CONFIG 32 + MIPS KVM_REG_MIPS_CP0_CONFIG1 32 + MIPS KVM_REG_MIPS_CP0_CONFIG2 32 + MIPS KVM_REG_MIPS_CP0_CONFIG3 32 + MIPS KVM_REG_MIPS_CP0_CONFIG4 32 + MIPS KVM_REG_MIPS_CP0_CONFIG5 32 + MIPS KVM_REG_MIPS_CP0_CONFIG7 32 + MIPS KVM_REG_MIPS_CP0_XCONTEXT 64 + MIPS KVM_REG_MIPS_CP0_ERROREPC 64 + MIPS KVM_REG_MIPS_CP0_KSCRATCH1 64 + MIPS KVM_REG_MIPS_CP0_KSCRATCH2 64 + MIPS KVM_REG_MIPS_CP0_KSCRATCH3 64 + MIPS KVM_REG_MIPS_CP0_KSCRATCH4 64 + MIPS KVM_REG_MIPS_CP0_KSCRATCH5 64 + MIPS KVM_REG_MIPS_CP0_KSCRATCH6 64 + MIPS KVM_REG_MIPS_CP0_MAAR(0..63) 64 + MIPS KVM_REG_MIPS_COUNT_CTL 64 + MIPS KVM_REG_MIPS_COUNT_RESUME 64 + MIPS KVM_REG_MIPS_COUNT_HZ 64 + MIPS KVM_REG_MIPS_FPR_32(0..31) 32 + MIPS KVM_REG_MIPS_FPR_64(0..31) 64 + MIPS KVM_REG_MIPS_VEC_128(0..31) 128 + MIPS KVM_REG_MIPS_FCR_IR 32 + MIPS KVM_REG_MIPS_FCR_CSR 32 + MIPS KVM_REG_MIPS_MSA_IR 32 + MIPS KVM_REG_MIPS_MSA_CSR 32 + ======= =============================== ============ ARM registers are mapped using the lower 32 bits. The upper 16 of that is the register group type, or coprocessor number: -ARM core registers have the following id bit patterns: +ARM core registers have the following id bit patterns:: + 0x4020 0000 0010 <index into the kvm_regs struct:16> -ARM 32-bit CP15 registers have the following id bit patterns: +ARM 32-bit CP15 registers have the following id bit patterns:: + 0x4020 0000 000F <zero:1> <crn:4> <crm:4> <opc1:4> <opc2:3> -ARM 64-bit CP15 registers have the following id bit patterns: +ARM 64-bit CP15 registers have the following id bit patterns:: + 0x4030 0000 000F <zero:1> <zero:4> <crm:4> <opc1:4> <zero:3> -ARM CCSIDR registers are demultiplexed by CSSELR value: +ARM CCSIDR registers are demultiplexed by CSSELR value:: + 0x4020 0000 0011 00 <csselr:8> -ARM 32-bit VFP control registers have the following id bit patterns: +ARM 32-bit VFP control registers have the following id bit patterns:: + 0x4020 0000 0012 1 <regno:12> -ARM 64-bit FP registers have the following id bit patterns: +ARM 64-bit FP registers have the following id bit patterns:: + 0x4030 0000 0012 0 <regno:12> -ARM firmware pseudo-registers have the following bit pattern: +ARM firmware pseudo-registers have the following bit pattern:: + 0x4030 0000 0014 <regno:16> @@ -2156,15 +2368,18 @@ that is the register group type, or coprocessor number: arm64 core/FP-SIMD registers have the following id bit patterns. Note that the size of the access is variable, as the kvm_regs structure contains elements ranging from 32 to 128 bits. The index is a 32bit -value in the kvm_regs structure seen as a 32bit array. +value in the kvm_regs structure seen as a 32bit array:: + 0x60x0 0000 0010 <index into the kvm_regs struct:16> Specifically: + +======================= ========= ===== ======================================= Encoding Register Bits kvm_regs member ----------------------------------------------------------------- +======================= ========= ===== ======================================= 0x6030 0000 0010 0000 X0 64 regs.regs[0] 0x6030 0000 0010 0002 X1 64 regs.regs[1] - ... + ... 0x6030 0000 0010 003c X30 64 regs.regs[30] 0x6030 0000 0010 003e SP 64 regs.sp 0x6030 0000 0010 0040 PC 64 regs.pc @@ -2176,27 +2391,31 @@ Specifically: 0x6030 0000 0010 004c SPSR_UND 64 spsr[KVM_SPSR_UND] 0x6030 0000 0010 004e SPSR_IRQ 64 spsr[KVM_SPSR_IRQ] 0x6060 0000 0010 0050 SPSR_FIQ 64 spsr[KVM_SPSR_FIQ] - 0x6040 0000 0010 0054 V0 128 fp_regs.vregs[0] (*) - 0x6040 0000 0010 0058 V1 128 fp_regs.vregs[1] (*) - ... - 0x6040 0000 0010 00d0 V31 128 fp_regs.vregs[31] (*) + 0x6040 0000 0010 0054 V0 128 fp_regs.vregs[0] [1]_ + 0x6040 0000 0010 0058 V1 128 fp_regs.vregs[1] [1]_ + ... + 0x6040 0000 0010 00d0 V31 128 fp_regs.vregs[31] [1]_ 0x6020 0000 0010 00d4 FPSR 32 fp_regs.fpsr 0x6020 0000 0010 00d5 FPCR 32 fp_regs.fpcr +======================= ========= ===== ======================================= -(*) These encodings are not accepted for SVE-enabled vcpus. See - KVM_ARM_VCPU_INIT. +.. [1] These encodings are not accepted for SVE-enabled vcpus. See + KVM_ARM_VCPU_INIT. - The equivalent register content can be accessed via bits [127:0] of - the corresponding SVE Zn registers instead for vcpus that have SVE - enabled (see below). + The equivalent register content can be accessed via bits [127:0] of + the corresponding SVE Zn registers instead for vcpus that have SVE + enabled (see below). + +arm64 CCSIDR registers are demultiplexed by CSSELR value:: -arm64 CCSIDR registers are demultiplexed by CSSELR value: 0x6020 0000 0011 00 <csselr:8> -arm64 system registers have the following id bit patterns: +arm64 system registers have the following id bit patterns:: + 0x6030 0000 0013 <op0:2> <op1:3> <crn:4> <crm:4> <op2:3> -WARNING: +.. warning:: + Two system register IDs do not follow the specified pattern. These are KVM_REG_ARM_TIMER_CVAL and KVM_REG_ARM_TIMER_CNT, which map to system registers CNTV_CVAL_EL0 and CNTVCT_EL0 respectively. These @@ -2205,10 +2424,12 @@ WARNING: derived from the register encoding for CNTV_CVAL_EL0. As this is API, it must remain this way. -arm64 firmware pseudo-registers have the following bit pattern: +arm64 firmware pseudo-registers have the following bit pattern:: + 0x6030 0000 0014 <regno:16> -arm64 SVE registers have the following bit patterns: +arm64 SVE registers have the following bit patterns:: + 0x6080 0000 0015 00 <n:5> <slice:5> Zn bits[2048*slice + 2047 : 2048*slice] 0x6050 0000 0015 04 <n:4> <slice:5> Pn bits[256*slice + 255 : 256*slice] 0x6050 0000 0015 060 <slice:5> FFR bits[256*slice + 255 : 256*slice] @@ -2216,7 +2437,7 @@ arm64 SVE registers have the following bit patterns: Access to register IDs where 2048 * slice >= 128 * max_vq will fail with ENOENT. max_vq is the vcpu's maximum supported vector length in 128-bit -quadwords: see (**) below. +quadwords: see [2]_ below. These registers are only accessible on vcpus for which SVE is enabled. See KVM_ARM_VCPU_INIT for details. @@ -2231,21 +2452,21 @@ lengths supported by the vcpu to be discovered and configured by userspace. When transferred to or from user memory via KVM_GET_ONE_REG or KVM_SET_ONE_REG, the value of this register is of type __u64[KVM_ARM64_SVE_VLS_WORDS], and encodes the set of vector lengths as -follows: +follows:: -__u64 vector_lengths[KVM_ARM64_SVE_VLS_WORDS]; + __u64 vector_lengths[KVM_ARM64_SVE_VLS_WORDS]; -if (vq >= SVE_VQ_MIN && vq <= SVE_VQ_MAX && - ((vector_lengths[(vq - KVM_ARM64_SVE_VQ_MIN) / 64] >> + if (vq >= SVE_VQ_MIN && vq <= SVE_VQ_MAX && + ((vector_lengths[(vq - KVM_ARM64_SVE_VQ_MIN) / 64] >> ((vq - KVM_ARM64_SVE_VQ_MIN) % 64)) & 1)) /* Vector length vq * 16 bytes supported */ -else + else /* Vector length vq * 16 bytes not supported */ -(**) The maximum value vq for which the above condition is true is -max_vq. This is the maximum vector length available to the guest on -this vcpu, and determines which register slices are visible through -this ioctl interface. +.. [2] The maximum value vq for which the above condition is true is + max_vq. This is the maximum vector length available to the guest on + this vcpu, and determines which register slices are visible through + this ioctl interface. (See Documentation/arm64/sve.rst for an explanation of the "vq" nomenclature.) @@ -2270,11 +2491,13 @@ write this register will fail with EPERM. MIPS registers are mapped using the lower 32 bits. The upper 16 of that is the register group type: -MIPS core registers (see above) have the following id bit patterns: +MIPS core registers (see above) have the following id bit patterns:: + 0x7030 0000 0000 <reg:16> MIPS CP0 registers (see KVM_REG_MIPS_CP0_* above) have the following id bit -patterns depending on whether they're 32-bit or 64-bit registers: +patterns depending on whether they're 32-bit or 64-bit registers:: + 0x7020 0000 0001 00 <reg:5> <sel:3> (32-bit) 0x7030 0000 0001 00 <reg:5> <sel:3> (64-bit) @@ -2285,10 +2508,12 @@ with the RI and XI bits (if they exist) in bits 63 and 62 respectively, and the PFNX field starting at bit 30. MIPS MAARs (see KVM_REG_MIPS_CP0_MAAR(*) above) have the following id bit -patterns: +patterns:: + 0x7030 0000 0001 01 <reg:8> -MIPS KVM control registers (see above) have the following id bit patterns: +MIPS KVM control registers (see above) have the following id bit patterns:: + 0x7030 0000 0002 <reg:16> MIPS FPU registers (see KVM_REG_MIPS_FPR_{32,64}() above) have the following @@ -2297,31 +2522,40 @@ always accessed according to the current guest FPU mode (Status.FR and Config5.FRE), i.e. as the guest would see them, and they become unpredictable if the guest FPU mode is changed. MIPS SIMD Architecture (MSA) vector registers (see KVM_REG_MIPS_VEC_128() above) have similar patterns as they -overlap the FPU registers: +overlap the FPU registers:: + 0x7020 0000 0003 00 <0:3> <reg:5> (32-bit FPU registers) 0x7030 0000 0003 00 <0:3> <reg:5> (64-bit FPU registers) 0x7040 0000 0003 00 <0:3> <reg:5> (128-bit MSA vector registers) MIPS FPU control registers (see KVM_REG_MIPS_FCR_{IR,CSR} above) have the -following id bit patterns: +following id bit patterns:: + 0x7020 0000 0003 01 <0:3> <reg:5> MIPS MSA control registers (see KVM_REG_MIPS_MSA_{IR,CSR} above) have the -following id bit patterns: +following id bit patterns:: + 0x7020 0000 0003 02 <0:3> <reg:5> 4.69 KVM_GET_ONE_REG +-------------------- + +:Capability: KVM_CAP_ONE_REG +:Architectures: all +:Type: vcpu ioctl +:Parameters: struct kvm_one_reg (in and out) +:Returns: 0 on success, negative value on failure -Capability: KVM_CAP_ONE_REG -Architectures: all -Type: vcpu ioctl -Parameters: struct kvm_one_reg (in and out) -Returns: 0 on success, negative value on failure Errors include: -  ENOENT:   no such register -  EINVAL:   invalid register ID, or no such register -  EPERM:    (arm64) register access not allowed before vcpu finalization + + ======== ============================================================ +  ENOENT   no such register +  EINVAL   invalid register ID, or no such register +  EPERM    (arm64) register access not allowed before vcpu finalization + ======== ============================================================ + (These error codes are indicative only: do not rely on a specific error code being returned in a specific situation.) @@ -2335,12 +2569,13 @@ list in 4.68. 4.70 KVM_KVMCLOCK_CTRL +---------------------- -Capability: KVM_CAP_KVMCLOCK_CTRL -Architectures: Any that implement pvclocks (currently x86 only) -Type: vcpu ioctl -Parameters: None -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_KVMCLOCK_CTRL +:Architectures: Any that implement pvclocks (currently x86 only) +:Type: vcpu ioctl +:Parameters: None +:Returns: 0 on success, -1 on error This signals to the host kernel that the specified guest is being paused by userspace. The host will set a flag in the pvclock structure that is checked @@ -2356,26 +2591,30 @@ after pausing the vcpu, but before it is resumed. 4.71 KVM_SIGNAL_MSI +------------------- -Capability: KVM_CAP_SIGNAL_MSI -Architectures: x86 arm arm64 -Type: vm ioctl -Parameters: struct kvm_msi (in) -Returns: >0 on delivery, 0 if guest blocked the MSI, and -1 on error +:Capability: KVM_CAP_SIGNAL_MSI +:Architectures: x86 arm arm64 +:Type: vm ioctl +:Parameters: struct kvm_msi (in) +:Returns: >0 on delivery, 0 if guest blocked the MSI, and -1 on error Directly inject a MSI message. Only valid with in-kernel irqchip that handles MSI messages. -struct kvm_msi { +:: + + struct kvm_msi { __u32 address_lo; __u32 address_hi; __u32 data; __u32 flags; __u32 devid; __u8 pad[12]; -}; + }; -flags: KVM_MSI_VALID_DEVID: devid contains a valid value. The per-VM +flags: + KVM_MSI_VALID_DEVID: devid contains a valid value. The per-VM KVM_CAP_MSI_DEVID capability advertises the requirement to provide the device ID. If this capability is not available, userspace should never set the KVM_MSI_VALID_DEVID flag as the ioctl might fail. @@ -2391,30 +2630,31 @@ address_hi must be zero. 4.71 KVM_CREATE_PIT2 +-------------------- -Capability: KVM_CAP_PIT2 -Architectures: x86 -Type: vm ioctl -Parameters: struct kvm_pit_config (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_PIT2 +:Architectures: x86 +:Type: vm ioctl +:Parameters: struct kvm_pit_config (in) +:Returns: 0 on success, -1 on error Creates an in-kernel device model for the i8254 PIT. This call is only valid after enabling in-kernel irqchip support via KVM_CREATE_IRQCHIP. The following -parameters have to be passed: +parameters have to be passed:: -struct kvm_pit_config { + struct kvm_pit_config { __u32 flags; __u32 pad[15]; -}; + }; -Valid flags are: +Valid flags are:: -#define KVM_PIT_SPEAKER_DUMMY 1 /* emulate speaker port stub */ + #define KVM_PIT_SPEAKER_DUMMY 1 /* emulate speaker port stub */ PIT timer interrupts may use a per-VM kernel thread for injection. If it -exists, this thread will have a name of the following pattern: +exists, this thread will have a name of the following pattern:: -kvm-pit/<owner-process-pid> + kvm-pit/<owner-process-pid> When running a guest with elevated priorities, the scheduling parameters of this thread may have to be adjusted accordingly. @@ -2423,37 +2663,39 @@ This IOCTL replaces the obsolete KVM_CREATE_PIT. 4.72 KVM_GET_PIT2 +----------------- -Capability: KVM_CAP_PIT_STATE2 -Architectures: x86 -Type: vm ioctl -Parameters: struct kvm_pit_state2 (out) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_PIT_STATE2 +:Architectures: x86 +:Type: vm ioctl +:Parameters: struct kvm_pit_state2 (out) +:Returns: 0 on success, -1 on error Retrieves the state of the in-kernel PIT model. Only valid after -KVM_CREATE_PIT2. The state is returned in the following structure: +KVM_CREATE_PIT2. The state is returned in the following structure:: -struct kvm_pit_state2 { + struct kvm_pit_state2 { struct kvm_pit_channel_state channels[3]; __u32 flags; __u32 reserved[9]; -}; + }; -Valid flags are: +Valid flags are:: -/* disable PIT in HPET legacy mode */ -#define KVM_PIT_FLAGS_HPET_LEGACY 0x00000001 + /* disable PIT in HPET legacy mode */ + #define KVM_PIT_FLAGS_HPET_LEGACY 0x00000001 This IOCTL replaces the obsolete KVM_GET_PIT. 4.73 KVM_SET_PIT2 +----------------- -Capability: KVM_CAP_PIT_STATE2 -Architectures: x86 -Type: vm ioctl -Parameters: struct kvm_pit_state2 (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_PIT_STATE2 +:Architectures: x86 +:Type: vm ioctl +:Parameters: struct kvm_pit_state2 (in) +:Returns: 0 on success, -1 on error Sets the state of the in-kernel PIT model. Only valid after KVM_CREATE_PIT2. See KVM_GET_PIT2 for details on struct kvm_pit_state2. @@ -2462,12 +2704,13 @@ This IOCTL replaces the obsolete KVM_SET_PIT. 4.74 KVM_PPC_GET_SMMU_INFO +-------------------------- -Capability: KVM_CAP_PPC_GET_SMMU_INFO -Architectures: powerpc -Type: vm ioctl -Parameters: None -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_PPC_GET_SMMU_INFO +:Architectures: powerpc +:Type: vm ioctl +:Parameters: None +:Returns: 0 on success, -1 on error This populates and returns a structure describing the features of the "Server" class MMU emulation supported by KVM. @@ -2475,7 +2718,7 @@ This can in turn be used by userspace to generate the appropriate device-tree properties for the guest operating system. The structure contains some global information, followed by an -array of supported segment page sizes: +array of supported segment page sizes:: struct kvm_ppc_smmu_info { __u64 flags; @@ -2503,7 +2746,7 @@ The "slb_size" field indicates how many SLB entries are supported The "sps" array contains 8 entries indicating the supported base page sizes for a segment in increasing order. Each entry is defined -as follow: +as follow:: struct kvm_ppc_one_seg_page_size { __u32 page_shift; /* Base page shift of segment (or 0) */ @@ -2524,7 +2767,7 @@ size provides the list of supported actual page sizes (which can be only larger or equal to the base page size), along with the corresponding encoding in the hash PTE. Similarly, the array is 8 entries sorted by increasing sizes and an entry with a "0" shift -is an empty entry and a terminator: +is an empty entry and a terminator:: struct kvm_ppc_one_page_size { __u32 page_shift; /* Page shift (or 0) */ @@ -2536,12 +2779,13 @@ PTE's RPN field (ie, it needs to be shifted left by 12 to OR it into the hash PTE second double word). 4.75 KVM_IRQFD +-------------- -Capability: KVM_CAP_IRQFD -Architectures: x86 s390 arm arm64 -Type: vm ioctl -Parameters: struct kvm_irqfd (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_IRQFD +:Architectures: x86 s390 arm arm64 +:Type: vm ioctl +:Parameters: struct kvm_irqfd (in) +:Returns: 0 on success, -1 on error Allows setting an eventfd to directly trigger a guest interrupt. kvm_irqfd.fd specifies the file descriptor to use as the eventfd and @@ -2565,6 +2809,7 @@ irqfd. The KVM_IRQFD_FLAG_RESAMPLE is only necessary on assignment and need not be specified with KVM_IRQFD_FLAG_DEASSIGN. On arm/arm64, gsi routing being supported, the following can happen: + - in case no routing entry is associated to this gsi, injection fails - in case the gsi is associated to an irqchip routing entry, irqchip.pin + 32 corresponds to the injected SPI ID. @@ -2573,12 +2818,13 @@ On arm/arm64, gsi routing being supported, the following can happen: to GICv3 ITS in-kernel emulation). 4.76 KVM_PPC_ALLOCATE_HTAB +-------------------------- -Capability: KVM_CAP_PPC_ALLOC_HTAB -Architectures: powerpc -Type: vm ioctl -Parameters: Pointer to u32 containing hash table order (in/out) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_PPC_ALLOC_HTAB +:Architectures: powerpc +:Type: vm ioctl +:Parameters: Pointer to u32 containing hash table order (in/out) +:Returns: 0 on success, -1 on error This requests the host kernel to allocate an MMU hash table for a guest using the PAPR paravirtualization interface. This only does @@ -2609,75 +2855,88 @@ real-mode area (VRMA) facility, the kernel will re-create the VMRA HPTEs on the next KVM_RUN of any vcpu. 4.77 KVM_S390_INTERRUPT +----------------------- -Capability: basic -Architectures: s390 -Type: vm ioctl, vcpu ioctl -Parameters: struct kvm_s390_interrupt (in) -Returns: 0 on success, -1 on error +:Capability: basic +:Architectures: s390 +:Type: vm ioctl, vcpu ioctl +:Parameters: struct kvm_s390_interrupt (in) +:Returns: 0 on success, -1 on error Allows to inject an interrupt to the guest. Interrupts can be floating (vm ioctl) or per cpu (vcpu ioctl), depending on the interrupt type. -Interrupt parameters are passed via kvm_s390_interrupt: +Interrupt parameters are passed via kvm_s390_interrupt:: -struct kvm_s390_interrupt { + struct kvm_s390_interrupt { __u32 type; __u32 parm; __u64 parm64; -}; + }; type can be one of the following: -KVM_S390_SIGP_STOP (vcpu) - sigp stop; optional flags in parm -KVM_S390_PROGRAM_INT (vcpu) - program check; code in parm -KVM_S390_SIGP_SET_PREFIX (vcpu) - sigp set prefix; prefix address in parm -KVM_S390_RESTART (vcpu) - restart -KVM_S390_INT_CLOCK_COMP (vcpu) - clock comparator interrupt -KVM_S390_INT_CPU_TIMER (vcpu) - CPU timer interrupt -KVM_S390_INT_VIRTIO (vm) - virtio external interrupt; external interrupt - parameters in parm and parm64 -KVM_S390_INT_SERVICE (vm) - sclp external interrupt; sclp parameter in parm -KVM_S390_INT_EMERGENCY (vcpu) - sigp emergency; source cpu in parm -KVM_S390_INT_EXTERNAL_CALL (vcpu) - sigp external call; source cpu in parm -KVM_S390_INT_IO(ai,cssid,ssid,schid) (vm) - compound value to indicate an - I/O interrupt (ai - adapter interrupt; cssid,ssid,schid - subchannel); - I/O interruption parameters in parm (subchannel) and parm64 (intparm, - interruption subclass) -KVM_S390_MCHK (vm, vcpu) - machine check interrupt; cr 14 bits in parm, - machine check interrupt code in parm64 (note that - machine checks needing further payload are not - supported by this ioctl) +KVM_S390_SIGP_STOP (vcpu) + - sigp stop; optional flags in parm +KVM_S390_PROGRAM_INT (vcpu) + - program check; code in parm +KVM_S390_SIGP_SET_PREFIX (vcpu) + - sigp set prefix; prefix address in parm +KVM_S390_RESTART (vcpu) + - restart +KVM_S390_INT_CLOCK_COMP (vcpu) + - clock comparator interrupt +KVM_S390_INT_CPU_TIMER (vcpu) + - CPU timer interrupt +KVM_S390_INT_VIRTIO (vm) + - virtio external interrupt; external interrupt + parameters in parm and parm64 +KVM_S390_INT_SERVICE (vm) + - sclp external interrupt; sclp parameter in parm +KVM_S390_INT_EMERGENCY (vcpu) + - sigp emergency; source cpu in parm +KVM_S390_INT_EXTERNAL_CALL (vcpu) + - sigp external call; source cpu in parm +KVM_S390_INT_IO(ai,cssid,ssid,schid) (vm) + - compound value to indicate an + I/O interrupt (ai - adapter interrupt; cssid,ssid,schid - subchannel); + I/O interruption parameters in parm (subchannel) and parm64 (intparm, + interruption subclass) +KVM_S390_MCHK (vm, vcpu) + - machine check interrupt; cr 14 bits in parm, machine check interrupt + code in parm64 (note that machine checks needing further payload are not + supported by this ioctl) This is an asynchronous vcpu ioctl and can be invoked from any thread. 4.78 KVM_PPC_GET_HTAB_FD +------------------------ -Capability: KVM_CAP_PPC_HTAB_FD -Architectures: powerpc -Type: vm ioctl -Parameters: Pointer to struct kvm_get_htab_fd (in) -Returns: file descriptor number (>= 0) on success, -1 on error +:Capability: KVM_CAP_PPC_HTAB_FD +:Architectures: powerpc +:Type: vm ioctl +:Parameters: Pointer to struct kvm_get_htab_fd (in) +:Returns: file descriptor number (>= 0) on success, -1 on error This returns a file descriptor that can be used either to read out the entries in the guest's hashed page table (HPT), or to write entries to initialize the HPT. The returned fd can only be written to if the KVM_GET_HTAB_WRITE bit is set in the flags field of the argument, and can only be read if that bit is clear. The argument struct looks like -this: +this:: -/* For KVM_PPC_GET_HTAB_FD */ -struct kvm_get_htab_fd { + /* For KVM_PPC_GET_HTAB_FD */ + struct kvm_get_htab_fd { __u64 flags; __u64 start_index; __u64 reserved[2]; -}; + }; -/* Values for kvm_get_htab_fd.flags */ -#define KVM_GET_HTAB_BOLTED_ONLY ((__u64)0x1) -#define KVM_GET_HTAB_WRITE ((__u64)0x2) + /* Values for kvm_get_htab_fd.flags */ + #define KVM_GET_HTAB_BOLTED_ONLY ((__u64)0x1) + #define KVM_GET_HTAB_WRITE ((__u64)0x2) -The `start_index' field gives the index in the HPT of the entry at +The 'start_index' field gives the index in the HPT of the entry at which to start reading. It is ignored when writing. Reads on the fd will initially supply information about all @@ -2692,29 +2951,34 @@ Data read or written is structured as a header (8 bytes) followed by a series of valid HPT entries (16 bytes) each. The header indicates how many valid HPT entries there are and how many invalid entries follow the valid entries. The invalid entries are not represented explicitly -in the stream. The header format is: +in the stream. The header format is:: -struct kvm_get_htab_header { + struct kvm_get_htab_header { __u32 index; __u16 n_valid; __u16 n_invalid; -}; + }; Writes to the fd create HPT entries starting at the index given in the -header; first `n_valid' valid entries with contents from the data -written, then `n_invalid' invalid entries, invalidating any previously +header; first 'n_valid' valid entries with contents from the data +written, then 'n_invalid' invalid entries, invalidating any previously valid entries found. 4.79 KVM_CREATE_DEVICE +---------------------- + +:Capability: KVM_CAP_DEVICE_CTRL +:Type: vm ioctl +:Parameters: struct kvm_create_device (in/out) +:Returns: 0 on success, -1 on error -Capability: KVM_CAP_DEVICE_CTRL -Type: vm ioctl -Parameters: struct kvm_create_device (in/out) -Returns: 0 on success, -1 on error Errors: - ENODEV: The device type is unknown or unsupported - EEXIST: Device already created, and this type of device may not + + ====== ======================================================= + ENODEV The device type is unknown or unsupported + EEXIST Device already created, and this type of device may not be instantiated multiple times + ====== ======================================================= Other error conditions may be defined by individual device types or have their standard meanings. @@ -2730,25 +2994,32 @@ Individual devices should not define flags. Attributes should be used for specifying any behavior that is not implied by the device type number. -struct kvm_create_device { +:: + + struct kvm_create_device { __u32 type; /* in: KVM_DEV_TYPE_xxx */ __u32 fd; /* out: device handle */ __u32 flags; /* in: KVM_CREATE_DEVICE_xxx */ -}; + }; 4.80 KVM_SET_DEVICE_ATTR/KVM_GET_DEVICE_ATTR +-------------------------------------------- + +:Capability: KVM_CAP_DEVICE_CTRL, KVM_CAP_VM_ATTRIBUTES for vm device, + KVM_CAP_VCPU_ATTRIBUTES for vcpu device +:Type: device ioctl, vm ioctl, vcpu ioctl +:Parameters: struct kvm_device_attr +:Returns: 0 on success, -1 on error -Capability: KVM_CAP_DEVICE_CTRL, KVM_CAP_VM_ATTRIBUTES for vm device, - KVM_CAP_VCPU_ATTRIBUTES for vcpu device -Type: device ioctl, vm ioctl, vcpu ioctl -Parameters: struct kvm_device_attr -Returns: 0 on success, -1 on error Errors: - ENXIO: The group or attribute is unknown/unsupported for this device + + ===== ============================================================= + ENXIO The group or attribute is unknown/unsupported for this device or hardware support is missing. - EPERM: The attribute cannot (currently) be accessed this way + EPERM The attribute cannot (currently) be accessed this way (e.g. read-only attribute, or attribute that only makes sense when the device is in a different state) + ===== ============================================================= Other error conditions may be defined by individual device types. @@ -2757,23 +3028,30 @@ semantics are device-specific. See individual device documentation in the "devices" directory. As with ONE_REG, the size of the data transferred is defined by the particular attribute. -struct kvm_device_attr { +:: + + struct kvm_device_attr { __u32 flags; /* no flags currently defined */ __u32 group; /* device-defined */ __u64 attr; /* group-defined */ __u64 addr; /* userspace address of attr data */ -}; + }; 4.81 KVM_HAS_DEVICE_ATTR +------------------------ + +:Capability: KVM_CAP_DEVICE_CTRL, KVM_CAP_VM_ATTRIBUTES for vm device, + KVM_CAP_VCPU_ATTRIBUTES for vcpu device +:Type: device ioctl, vm ioctl, vcpu ioctl +:Parameters: struct kvm_device_attr +:Returns: 0 on success, -1 on error -Capability: KVM_CAP_DEVICE_CTRL, KVM_CAP_VM_ATTRIBUTES for vm device, - KVM_CAP_VCPU_ATTRIBUTES for vcpu device -Type: device ioctl, vm ioctl, vcpu ioctl -Parameters: struct kvm_device_attr -Returns: 0 on success, -1 on error Errors: - ENXIO: The group or attribute is unknown/unsupported for this device + + ===== ============================================================= + ENXIO The group or attribute is unknown/unsupported for this device or hardware support is missing. + ===== ============================================================= Tests whether a device supports a particular attribute. A successful return indicates the attribute is implemented. It does not necessarily @@ -2781,15 +3059,20 @@ indicate that the attribute can be read or written in the device's current state. "addr" is ignored. 4.82 KVM_ARM_VCPU_INIT +---------------------- + +:Capability: basic +:Architectures: arm, arm64 +:Type: vcpu ioctl +:Parameters: struct kvm_vcpu_init (in) +:Returns: 0 on success; -1 on error -Capability: basic -Architectures: arm, arm64 -Type: vcpu ioctl -Parameters: struct kvm_vcpu_init (in) -Returns: 0 on success; -1 on error Errors: -  EINVAL:    the target is unknown, or the combination of features is invalid. -  ENOENT:    a features bit specified is unknown. + + ====== ================================================================= +  EINVAL    the target is unknown, or the combination of features is invalid. +  ENOENT    a features bit specified is unknown. + ====== ================================================================= This tells KVM what type of CPU to present to the guest, and what optional features it should have.  This will cause a reset of the cpu @@ -2805,6 +3088,7 @@ state. All calls to this function after the initial call must use the same target and same set of feature flags, otherwise EINVAL will be returned. Possible features: + - KVM_ARM_VCPU_POWER_OFF: Starts the CPU in a power-off state. Depends on KVM_CAP_ARM_PSCI. If not set, the CPU will be powered on and execute guest code when KVM_RUN is called. @@ -2861,14 +3145,19 @@ Possible features: no longer be written using KVM_SET_ONE_REG. 4.83 KVM_ARM_PREFERRED_TARGET +----------------------------- + +:Capability: basic +:Architectures: arm, arm64 +:Type: vm ioctl +:Parameters: struct struct kvm_vcpu_init (out) +:Returns: 0 on success; -1 on error -Capability: basic -Architectures: arm, arm64 -Type: vm ioctl -Parameters: struct struct kvm_vcpu_init (out) -Returns: 0 on success; -1 on error Errors: - ENODEV: no preferred target available for the host + + ====== ========================================== + ENODEV no preferred target available for the host + ====== ========================================== This queries KVM for preferred CPU target type which can be emulated by KVM on underlying host. @@ -2885,43 +3174,57 @@ in VCPU matching underlying host. 4.84 KVM_GET_REG_LIST +--------------------- + +:Capability: basic +:Architectures: arm, arm64, mips +:Type: vcpu ioctl +:Parameters: struct kvm_reg_list (in/out) +:Returns: 0 on success; -1 on error -Capability: basic -Architectures: arm, arm64, mips -Type: vcpu ioctl -Parameters: struct kvm_reg_list (in/out) -Returns: 0 on success; -1 on error Errors: -  E2BIG:     the reg index list is too big to fit in the array specified by + + ===== ============================================================== +  E2BIG     the reg index list is too big to fit in the array specified by             the user (the number required will be written into n). + ===== ============================================================== + +:: -struct kvm_reg_list { + struct kvm_reg_list { __u64 n; /* number of registers in reg[] */ __u64 reg[0]; -}; + }; This ioctl returns the guest registers that are supported for the KVM_GET_ONE_REG/KVM_SET_ONE_REG calls. 4.85 KVM_ARM_SET_DEVICE_ADDR (deprecated) +----------------------------------------- + +:Capability: KVM_CAP_ARM_SET_DEVICE_ADDR +:Architectures: arm, arm64 +:Type: vm ioctl +:Parameters: struct kvm_arm_device_address (in) +:Returns: 0 on success, -1 on error -Capability: KVM_CAP_ARM_SET_DEVICE_ADDR -Architectures: arm, arm64 -Type: vm ioctl -Parameters: struct kvm_arm_device_address (in) -Returns: 0 on success, -1 on error Errors: - ENODEV: The device id is unknown - ENXIO: Device not supported on current system - EEXIST: Address already set - E2BIG: Address outside guest physical address space - EBUSY: Address overlaps with other device range -struct kvm_arm_device_addr { + ====== ============================================ + ENODEV The device id is unknown + ENXIO Device not supported on current system + EEXIST Address already set + E2BIG Address outside guest physical address space + EBUSY Address overlaps with other device range + ====== ============================================ + +:: + + struct kvm_arm_device_addr { __u64 id; __u64 addr; -}; + }; Specify a device address in the guest's physical address space where guests can access emulated or directly exposed devices, which the host kernel needs @@ -2929,7 +3232,7 @@ to know about. The id field is an architecture specific identifier for a specific device. ARM/arm64 divides the id field into two parts, a device id and an -address type id specific to the individual device. +address type id specific to the individual device::  bits: | 63 ... 32 | 31 ... 16 | 15 ... 0 | field: | 0x00000000 | device id | addr type id | @@ -2947,12 +3250,13 @@ should be used instead. 4.86 KVM_PPC_RTAS_DEFINE_TOKEN +------------------------------ -Capability: KVM_CAP_PPC_RTAS -Architectures: ppc -Type: vm ioctl -Parameters: struct kvm_rtas_token_args -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_PPC_RTAS +:Architectures: ppc +:Type: vm ioctl +:Parameters: struct kvm_rtas_token_args +:Returns: 0 on success, -1 on error Defines a token value for a RTAS (Run Time Abstraction Services) service in order to allow it to be handled in the kernel. The @@ -2966,18 +3270,21 @@ calls by the guest for that service will be passed to userspace to be handled. 4.87 KVM_SET_GUEST_DEBUG +------------------------ -Capability: KVM_CAP_SET_GUEST_DEBUG -Architectures: x86, s390, ppc, arm64 -Type: vcpu ioctl -Parameters: struct kvm_guest_debug (in) -Returns: 0 on success; -1 on error +:Capability: KVM_CAP_SET_GUEST_DEBUG +:Architectures: x86, s390, ppc, arm64 +:Type: vcpu ioctl +:Parameters: struct kvm_guest_debug (in) +:Returns: 0 on success; -1 on error + +:: -struct kvm_guest_debug { + struct kvm_guest_debug { __u32 control; __u32 pad; struct kvm_guest_debug_arch arch; -}; + }; Set up the processor specific debug registers and configure vcpu for handling guest debug events. There are two parts to the structure, the @@ -3019,26 +3326,31 @@ KVM_EXIT_DEBUG with the kvm_debug_exit_arch part of the kvm_run structure containing architecture specific debug information. 4.88 KVM_GET_EMULATED_CPUID +--------------------------- + +:Capability: KVM_CAP_EXT_EMUL_CPUID +:Architectures: x86 +:Type: system ioctl +:Parameters: struct kvm_cpuid2 (in/out) +:Returns: 0 on success, -1 on error -Capability: KVM_CAP_EXT_EMUL_CPUID -Architectures: x86 -Type: system ioctl -Parameters: struct kvm_cpuid2 (in/out) -Returns: 0 on success, -1 on error +:: -struct kvm_cpuid2 { + struct kvm_cpuid2 { __u32 nent; __u32 flags; struct kvm_cpuid_entry2 entries[0]; -}; + }; The member 'flags' is used for passing flags from userspace. -#define KVM_CPUID_FLAG_SIGNIFCANT_INDEX BIT(0) -#define KVM_CPUID_FLAG_STATEFUL_FUNC BIT(1) -#define KVM_CPUID_FLAG_STATE_READ_NEXT BIT(2) +:: -struct kvm_cpuid_entry2 { + #define KVM_CPUID_FLAG_SIGNIFCANT_INDEX BIT(0) + #define KVM_CPUID_FLAG_STATEFUL_FUNC BIT(1) + #define KVM_CPUID_FLAG_STATE_READ_NEXT BIT(2) + + struct kvm_cpuid_entry2 { __u32 function; __u32 index; __u32 flags; @@ -3047,7 +3359,7 @@ struct kvm_cpuid_entry2 { __u32 ecx; __u32 edx; __u32 padding[3]; -}; + }; This ioctl returns x86 cpuid features which are emulated by kvm.Userspace can use the information returned by this ioctl to query @@ -3072,10 +3384,14 @@ emulated efficiently and thus not included here. The fields in each entry are defined as follows: - function: the eax value used to obtain the entry - index: the ecx value used to obtain the entry (for entries that are + function: + the eax value used to obtain the entry + index: + the ecx value used to obtain the entry (for entries that are affected by ecx) - flags: an OR of zero or more of the following: + flags: + an OR of zero or more of the following: + KVM_CPUID_FLAG_SIGNIFCANT_INDEX: if the index field is valid KVM_CPUID_FLAG_STATEFUL_FUNC: @@ -3085,24 +3401,28 @@ The fields in each entry are defined as follows: KVM_CPUID_FLAG_STATE_READ_NEXT: for KVM_CPUID_FLAG_STATEFUL_FUNC entries, set if this entry is the first entry to be read by a cpu - eax, ebx, ecx, edx: the values returned by the cpuid instruction for + + eax, ebx, ecx, edx: + + the values returned by the cpuid instruction for this function/index combination 4.89 KVM_S390_MEM_OP +-------------------- -Capability: KVM_CAP_S390_MEM_OP -Architectures: s390 -Type: vcpu ioctl -Parameters: struct kvm_s390_mem_op (in) -Returns: = 0 on success, - < 0 on generic error (e.g. -EFAULT or -ENOMEM), - > 0 if an exception occurred while walking the page tables +:Capability: KVM_CAP_S390_MEM_OP +:Architectures: s390 +:Type: vcpu ioctl +:Parameters: struct kvm_s390_mem_op (in) +:Returns: = 0 on success, + < 0 on generic error (e.g. -EFAULT or -ENOMEM), + > 0 if an exception occurred while walking the page tables Read or write data from/to the logical (virtual) memory of a VCPU. -Parameters are specified via the following structure: +Parameters are specified via the following structure:: -struct kvm_s390_mem_op { + struct kvm_s390_mem_op { __u64 gaddr; /* the guest address */ __u64 flags; /* flags */ __u32 size; /* amount of bytes */ @@ -3110,7 +3430,7 @@ struct kvm_s390_mem_op { __u64 buf; /* buffer in userspace */ __u8 ar; /* the access register number */ __u8 reserved[31]; /* should be set to 0 */ -}; + }; The type of operation is specified in the "op" field. It is either KVM_S390_MEMOP_LOGICAL_READ for reading from logical memory space or @@ -3137,24 +3457,25 @@ The "reserved" field is meant for future extensions. It is not used by KVM with the currently defined set of flags. 4.90 KVM_S390_GET_SKEYS +----------------------- -Capability: KVM_CAP_S390_SKEYS -Architectures: s390 -Type: vm ioctl -Parameters: struct kvm_s390_skeys -Returns: 0 on success, KVM_S390_GET_KEYS_NONE if guest is not using storage - keys, negative value on error +:Capability: KVM_CAP_S390_SKEYS +:Architectures: s390 +:Type: vm ioctl +:Parameters: struct kvm_s390_skeys +:Returns: 0 on success, KVM_S390_GET_KEYS_NONE if guest is not using storage + keys, negative value on error This ioctl is used to get guest storage key values on the s390 -architecture. The ioctl takes parameters via the kvm_s390_skeys struct. +architecture. The ioctl takes parameters via the kvm_s390_skeys struct:: -struct kvm_s390_skeys { + struct kvm_s390_skeys { __u64 start_gfn; __u64 count; __u64 skeydata_addr; __u32 flags; __u32 reserved[9]; -}; + }; The start_gfn field is the number of the first guest frame whose storage keys you want to get. @@ -3168,12 +3489,13 @@ The skeydata_addr field is the address to a buffer large enough to hold count bytes. This buffer will be filled with storage key data by the ioctl. 4.91 KVM_S390_SET_SKEYS +----------------------- -Capability: KVM_CAP_S390_SKEYS -Architectures: s390 -Type: vm ioctl -Parameters: struct kvm_s390_skeys -Returns: 0 on success, negative value on error +:Capability: KVM_CAP_S390_SKEYS +:Architectures: s390 +:Type: vm ioctl +:Parameters: struct kvm_s390_skeys +:Returns: 0 on success, negative value on error This ioctl is used to set guest storage key values on the s390 architecture. The ioctl takes parameters via the kvm_s390_skeys struct. @@ -3195,21 +3517,27 @@ Note: If any architecturally invalid key value is found in the given data then the ioctl will return -EINVAL. 4.92 KVM_S390_IRQ +----------------- + +:Capability: KVM_CAP_S390_INJECT_IRQ +:Architectures: s390 +:Type: vcpu ioctl +:Parameters: struct kvm_s390_irq (in) +:Returns: 0 on success, -1 on error -Capability: KVM_CAP_S390_INJECT_IRQ -Architectures: s390 -Type: vcpu ioctl -Parameters: struct kvm_s390_irq (in) -Returns: 0 on success, -1 on error Errors: - EINVAL: interrupt type is invalid - type is KVM_S390_SIGP_STOP and flag parameter is invalid value + + + ====== ================================================================= + EINVAL interrupt type is invalid + type is KVM_S390_SIGP_STOP and flag parameter is invalid value, type is KVM_S390_INT_EXTERNAL_CALL and code is bigger - than the maximum of VCPUs - EBUSY: type is KVM_S390_SIGP_SET_PREFIX and vcpu is not stopped - type is KVM_S390_SIGP_STOP and a stop irq is already pending + than the maximum of VCPUs + EBUSY type is KVM_S390_SIGP_SET_PREFIX and vcpu is not stopped, + type is KVM_S390_SIGP_STOP and a stop irq is already pending, type is KVM_S390_INT_EXTERNAL_CALL and an external call interrupt - is already pending + is already pending + ====== ================================================================= Allows to inject an interrupt to the guest. @@ -3217,9 +3545,9 @@ Using struct kvm_s390_irq as a parameter allows to inject additional payload which is not possible via KVM_S390_INTERRUPT. -Interrupt parameters are passed via kvm_s390_irq: +Interrupt parameters are passed via kvm_s390_irq:: -struct kvm_s390_irq { + struct kvm_s390_irq { __u64 type; union { struct kvm_s390_io_info io; @@ -3232,44 +3560,45 @@ struct kvm_s390_irq { struct kvm_s390_mchk_info mchk; char reserved[64]; } u; -}; + }; type can be one of the following: -KVM_S390_SIGP_STOP - sigp stop; parameter in .stop -KVM_S390_PROGRAM_INT - program check; parameters in .pgm -KVM_S390_SIGP_SET_PREFIX - sigp set prefix; parameters in .prefix -KVM_S390_RESTART - restart; no parameters -KVM_S390_INT_CLOCK_COMP - clock comparator interrupt; no parameters -KVM_S390_INT_CPU_TIMER - CPU timer interrupt; no parameters -KVM_S390_INT_EMERGENCY - sigp emergency; parameters in .emerg -KVM_S390_INT_EXTERNAL_CALL - sigp external call; parameters in .extcall -KVM_S390_MCHK - machine check interrupt; parameters in .mchk +- KVM_S390_SIGP_STOP - sigp stop; parameter in .stop +- KVM_S390_PROGRAM_INT - program check; parameters in .pgm +- KVM_S390_SIGP_SET_PREFIX - sigp set prefix; parameters in .prefix +- KVM_S390_RESTART - restart; no parameters +- KVM_S390_INT_CLOCK_COMP - clock comparator interrupt; no parameters +- KVM_S390_INT_CPU_TIMER - CPU timer interrupt; no parameters +- KVM_S390_INT_EMERGENCY - sigp emergency; parameters in .emerg +- KVM_S390_INT_EXTERNAL_CALL - sigp external call; parameters in .extcall +- KVM_S390_MCHK - machine check interrupt; parameters in .mchk This is an asynchronous vcpu ioctl and can be invoked from any thread. 4.94 KVM_S390_GET_IRQ_STATE +--------------------------- -Capability: KVM_CAP_S390_IRQ_STATE -Architectures: s390 -Type: vcpu ioctl -Parameters: struct kvm_s390_irq_state (out) -Returns: >= number of bytes copied into buffer, - -EINVAL if buffer size is 0, - -ENOBUFS if buffer size is too small to fit all pending interrupts, - -EFAULT if the buffer address was invalid +:Capability: KVM_CAP_S390_IRQ_STATE +:Architectures: s390 +:Type: vcpu ioctl +:Parameters: struct kvm_s390_irq_state (out) +:Returns: >= number of bytes copied into buffer, + -EINVAL if buffer size is 0, + -ENOBUFS if buffer size is too small to fit all pending interrupts, + -EFAULT if the buffer address was invalid This ioctl allows userspace to retrieve the complete state of all currently pending interrupts in a single buffer. Use cases include migration and introspection. The parameter structure contains the address of a -userspace buffer and its length: +userspace buffer and its length:: -struct kvm_s390_irq_state { + struct kvm_s390_irq_state { __u64 buf; __u32 flags; /* will stay unused for compatibility reasons */ __u32 len; __u32 reserved[4]; /* will stay unused for compatibility reasons */ -}; + }; Userspace passes in the above struct and for each pending interrupt a struct kvm_s390_irq is copied to the provided buffer. @@ -3283,29 +3612,30 @@ If -ENOBUFS is returned the buffer provided was too small and userspace may retry with a bigger buffer. 4.95 KVM_S390_SET_IRQ_STATE - -Capability: KVM_CAP_S390_IRQ_STATE -Architectures: s390 -Type: vcpu ioctl -Parameters: struct kvm_s390_irq_state (in) -Returns: 0 on success, - -EFAULT if the buffer address was invalid, - -EINVAL for an invalid buffer length (see below), - -EBUSY if there were already interrupts pending, - errors occurring when actually injecting the +--------------------------- + +:Capability: KVM_CAP_S390_IRQ_STATE +:Architectures: s390 +:Type: vcpu ioctl +:Parameters: struct kvm_s390_irq_state (in) +:Returns: 0 on success, + -EFAULT if the buffer address was invalid, + -EINVAL for an invalid buffer length (see below), + -EBUSY if there were already interrupts pending, + errors occurring when actually injecting the interrupt. See KVM_S390_IRQ. This ioctl allows userspace to set the complete state of all cpu-local interrupts currently pending for the vcpu. It is intended for restoring interrupt state after a migration. The input parameter is a userspace buffer -containing a struct kvm_s390_irq_state: +containing a struct kvm_s390_irq_state:: -struct kvm_s390_irq_state { + struct kvm_s390_irq_state { __u64 buf; __u32 flags; /* will stay unused for compatibility reasons */ __u32 len; __u32 reserved[4]; /* will stay unused for compatibility reasons */ -}; + }; The restrictions for flags and reserved apply as well. (see KVM_S390_GET_IRQ_STATE) @@ -3320,20 +3650,22 @@ and it must not exceed (max_vcpus + 32) * sizeof(struct kvm_s390_irq), which is the maximum number of possibly pending cpu-local interrupts. 4.96 KVM_SMI +------------ -Capability: KVM_CAP_X86_SMM -Architectures: x86 -Type: vcpu ioctl -Parameters: none -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_X86_SMM +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: none +:Returns: 0 on success, -1 on error Queues an SMI on the thread's vcpu. 4.97 KVM_CAP_PPC_MULTITCE +------------------------- -Capability: KVM_CAP_PPC_MULTITCE -Architectures: ppc -Type: vm +:Capability: KVM_CAP_PPC_MULTITCE +:Architectures: ppc +:Type: vm This capability means the kernel is capable of handling hypercalls H_PUT_TCE_INDIRECT and H_STUFF_TCE without passing those into the user @@ -3355,26 +3687,27 @@ an implementation for these despite the in kernel acceleration. This capability is always enabled. 4.98 KVM_CREATE_SPAPR_TCE_64 +---------------------------- -Capability: KVM_CAP_SPAPR_TCE_64 -Architectures: powerpc -Type: vm ioctl -Parameters: struct kvm_create_spapr_tce_64 (in) -Returns: file descriptor for manipulating the created TCE table +:Capability: KVM_CAP_SPAPR_TCE_64 +:Architectures: powerpc +:Type: vm ioctl +:Parameters: struct kvm_create_spapr_tce_64 (in) +:Returns: file descriptor for manipulating the created TCE table This is an extension for KVM_CAP_SPAPR_TCE which only supports 32bit windows, described in 4.62 KVM_CREATE_SPAPR_TCE -This capability uses extended struct in ioctl interface: +This capability uses extended struct in ioctl interface:: -/* for KVM_CAP_SPAPR_TCE_64 */ -struct kvm_create_spapr_tce_64 { + /* for KVM_CAP_SPAPR_TCE_64 */ + struct kvm_create_spapr_tce_64 { __u64 liobn; __u32 page_shift; __u32 flags; __u64 offset; /* in pages */ __u64 size; /* in pages */ -}; + }; The aim of extension is to support an additional bigger DMA window with a variable page size. @@ -3387,12 +3720,13 @@ of IOMMU pages. The rest of functionality is identical to KVM_CREATE_SPAPR_TCE. 4.99 KVM_REINJECT_CONTROL +------------------------- -Capability: KVM_CAP_REINJECT_CONTROL -Architectures: x86 -Type: vm ioctl -Parameters: struct kvm_reinject_control (in) -Returns: 0 on success, +:Capability: KVM_CAP_REINJECT_CONTROL +:Architectures: x86 +:Type: vm ioctl +:Parameters: struct kvm_reinject_control (in) +:Returns: 0 on success, -EFAULT if struct kvm_reinject_control cannot be read, -ENXIO if KVM_CREATE_PIT or KVM_CREATE_PIT2 didn't succeed earlier. @@ -3402,21 +3736,24 @@ vector(s) that i8254 injects. Reinject mode dequeues a tick and injects its interrupt whenever there isn't a pending interrupt from i8254. !reinject mode injects an interrupt as soon as a tick arrives. -struct kvm_reinject_control { +:: + + struct kvm_reinject_control { __u8 pit_reinject; __u8 reserved[31]; -}; + }; pit_reinject = 0 (!reinject mode) is recommended, unless running an old operating system that uses the PIT for timing (e.g. Linux 2.4.x). 4.100 KVM_PPC_CONFIGURE_V3_MMU +------------------------------ -Capability: KVM_CAP_PPC_RADIX_MMU or KVM_CAP_PPC_HASH_MMU_V3 -Architectures: ppc -Type: vm ioctl -Parameters: struct kvm_ppc_mmuv3_cfg (in) -Returns: 0 on success, +:Capability: KVM_CAP_PPC_RADIX_MMU or KVM_CAP_PPC_HASH_MMU_V3 +:Architectures: ppc +:Type: vm ioctl +:Parameters: struct kvm_ppc_mmuv3_cfg (in) +:Returns: 0 on success, -EFAULT if struct kvm_ppc_mmuv3_cfg cannot be read, -EINVAL if the configuration is invalid @@ -3424,10 +3761,12 @@ This ioctl controls whether the guest will use radix or HPT (hashed page table) translation, and sets the pointer to the process table for the guest. -struct kvm_ppc_mmuv3_cfg { +:: + + struct kvm_ppc_mmuv3_cfg { __u64 flags; __u64 process_table; -}; + }; There are two bits that can be set in flags; KVM_PPC_MMUV3_RADIX and KVM_PPC_MMUV3_GTSE. KVM_PPC_MMUV3_RADIX, if set, configures the guest @@ -3442,12 +3781,13 @@ as the second doubleword of the partition table entry, as defined in the Power ISA V3.00, Book III section 5.7.6.1. 4.101 KVM_PPC_GET_RMMU_INFO +--------------------------- -Capability: KVM_CAP_PPC_RADIX_MMU -Architectures: ppc -Type: vm ioctl -Parameters: struct kvm_ppc_rmmu_info (out) -Returns: 0 on success, +:Capability: KVM_CAP_PPC_RADIX_MMU +:Architectures: ppc +:Type: vm ioctl +:Parameters: struct kvm_ppc_rmmu_info (out) +:Returns: 0 on success, -EFAULT if struct kvm_ppc_rmmu_info cannot be written, -EINVAL if no useful information can be returned @@ -3456,14 +3796,16 @@ containing supported radix tree geometries, and (b) a list that maps page sizes to put in the "AP" (actual page size) field for the tlbie (TLB invalidate entry) instruction. -struct kvm_ppc_rmmu_info { +:: + + struct kvm_ppc_rmmu_info { struct kvm_ppc_radix_geom { __u8 page_shift; __u8 level_bits[4]; __u8 pad[3]; } geometries[8]; __u32 ap_encodings[8]; -}; + }; The geometries[] field gives up to 8 supported geometries for the radix page table, in terms of the log base 2 of the smallest page @@ -3476,19 +3818,54 @@ encodings, encoded with the AP value in the top 3 bits and the log base 2 of the page size in the bottom 6 bits. 4.102 KVM_PPC_RESIZE_HPT_PREPARE +-------------------------------- -Capability: KVM_CAP_SPAPR_RESIZE_HPT -Architectures: powerpc -Type: vm ioctl -Parameters: struct kvm_ppc_resize_hpt (in) -Returns: 0 on successful completion, +:Capability: KVM_CAP_SPAPR_RESIZE_HPT +:Architectures: powerpc +:Type: vm ioctl +:Parameters: struct kvm_ppc_resize_hpt (in) +:Returns: 0 on successful completion, >0 if a new HPT is being prepared, the value is an estimated - number of milliseconds until preparation is complete + number of milliseconds until preparation is complete, -EFAULT if struct kvm_reinject_control cannot be read, - -EINVAL if the supplied shift or flags are invalid - -ENOMEM if unable to allocate the new HPT - -ENOSPC if there was a hash collision when moving existing - HPT entries to the new HPT + -EINVAL if the supplied shift or flags are invalid, + -ENOMEM if unable to allocate the new HPT, + -ENOSPC if there was a hash collision + +:: + + struct kvm_ppc_rmmu_info { + struct kvm_ppc_radix_geom { + __u8 page_shift; + __u8 level_bits[4]; + __u8 pad[3]; + } geometries[8]; + __u32 ap_encodings[8]; + }; + +The geometries[] field gives up to 8 supported geometries for the +radix page table, in terms of the log base 2 of the smallest page +size, and the number of bits indexed at each level of the tree, from +the PTE level up to the PGD level in that order. Any unused entries +will have 0 in the page_shift field. + +The ap_encodings gives the supported page sizes and their AP field +encodings, encoded with the AP value in the top 3 bits and the log +base 2 of the page size in the bottom 6 bits. + +4.102 KVM_PPC_RESIZE_HPT_PREPARE +-------------------------------- + +:Capability: KVM_CAP_SPAPR_RESIZE_HPT +:Architectures: powerpc +:Type: vm ioctl +:Parameters: struct kvm_ppc_resize_hpt (in) +:Returns: 0 on successful completion, + >0 if a new HPT is being prepared, the value is an estimated + number of milliseconds until preparation is complete, + -EFAULT if struct kvm_reinject_control cannot be read, + -EINVAL if the supplied shift or flags are invalid,when moving existing + HPT entries to the new HPT, -EIO on other error conditions Used to implement the PAPR extension for runtime resizing of a guest's @@ -3506,6 +3883,7 @@ requested in the parameters, discards the existing pending HPT and creates a new one as above. If called when there is a pending HPT of the size requested, will: + * If preparation of the pending HPT is already complete, return 0 * If preparation of the pending HPT has failed, return an error code, then discard the pending HPT. @@ -3522,26 +3900,29 @@ Normally this will be called repeatedly with the same parameters until it returns <= 0. The first call will initiate preparation, subsequent ones will monitor preparation until it completes or fails. -struct kvm_ppc_resize_hpt { +:: + + struct kvm_ppc_resize_hpt { __u64 flags; __u32 shift; __u32 pad; -}; + }; 4.103 KVM_PPC_RESIZE_HPT_COMMIT +------------------------------- -Capability: KVM_CAP_SPAPR_RESIZE_HPT -Architectures: powerpc -Type: vm ioctl -Parameters: struct kvm_ppc_resize_hpt (in) -Returns: 0 on successful completion, +:Capability: KVM_CAP_SPAPR_RESIZE_HPT +:Architectures: powerpc +:Type: vm ioctl +:Parameters: struct kvm_ppc_resize_hpt (in) +:Returns: 0 on successful completion, -EFAULT if struct kvm_reinject_control cannot be read, - -EINVAL if the supplied shift or flags are invalid + -EINVAL if the supplied shift or flags are invalid, -ENXIO is there is no pending HPT, or the pending HPT doesn't - have the requested size - -EBUSY if the pending HPT is not fully prepared + have the requested size, + -EBUSY if the pending HPT is not fully prepared, -ENOSPC if there was a hash collision when moving existing - HPT entries to the new HPT + HPT entries to the new HPT, -EIO on other error conditions Used to implement the PAPR extension for runtime resizing of a guest's @@ -3564,31 +3945,35 @@ HPT and the previous HPT will be discarded. On failure, the guest will still be operating on its previous HPT. -struct kvm_ppc_resize_hpt { +:: + + struct kvm_ppc_resize_hpt { __u64 flags; __u32 shift; __u32 pad; -}; + }; 4.104 KVM_X86_GET_MCE_CAP_SUPPORTED +----------------------------------- -Capability: KVM_CAP_MCE -Architectures: x86 -Type: system ioctl -Parameters: u64 mce_cap (out) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_MCE +:Architectures: x86 +:Type: system ioctl +:Parameters: u64 mce_cap (out) +:Returns: 0 on success, -1 on error Returns supported MCE capabilities. The u64 mce_cap parameter has the same format as the MSR_IA32_MCG_CAP register. Supported capabilities will have the corresponding bits set. 4.105 KVM_X86_SETUP_MCE +----------------------- -Capability: KVM_CAP_MCE -Architectures: x86 -Type: vcpu ioctl -Parameters: u64 mcg_cap (in) -Returns: 0 on success, +:Capability: KVM_CAP_MCE +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: u64 mcg_cap (in) +:Returns: 0 on success, -EFAULT if u64 mcg_cap cannot be read, -EINVAL if the requested number of banks is invalid, -EINVAL if requested MCE capability is not supported. @@ -3601,20 +3986,21 @@ checking for KVM_CAP_MCE. The supported capabilities can be retrieved with KVM_X86_GET_MCE_CAP_SUPPORTED. 4.106 KVM_X86_SET_MCE +--------------------- -Capability: KVM_CAP_MCE -Architectures: x86 -Type: vcpu ioctl -Parameters: struct kvm_x86_mce (in) -Returns: 0 on success, +:Capability: KVM_CAP_MCE +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: struct kvm_x86_mce (in) +:Returns: 0 on success, -EFAULT if struct kvm_x86_mce cannot be read, -EINVAL if the bank number is invalid, -EINVAL if VAL bit is not set in status field. Inject a machine check error (MCE) into the guest. The input -parameter is: +parameter is:: -struct kvm_x86_mce { + struct kvm_x86_mce { __u64 status; __u64 addr; __u64 misc; @@ -3622,7 +4008,7 @@ struct kvm_x86_mce { __u8 bank; __u8 pad1[7]; __u64 pad2[3]; -}; + }; If the MCE being reported is an uncorrected error, KVM will inject it as an MCE exception into the guest. If the guest @@ -3634,15 +4020,17 @@ store it in the corresponding bank (provided this bank is not holding a previously reported uncorrected error). 4.107 KVM_S390_GET_CMMA_BITS +---------------------------- -Capability: KVM_CAP_S390_CMMA_MIGRATION -Architectures: s390 -Type: vm ioctl -Parameters: struct kvm_s390_cmma_log (in, out) -Returns: 0 on success, a negative value on error +:Capability: KVM_CAP_S390_CMMA_MIGRATION +:Architectures: s390 +:Type: vm ioctl +:Parameters: struct kvm_s390_cmma_log (in, out) +:Returns: 0 on success, a negative value on error This ioctl is used to get the values of the CMMA bits on the s390 architecture. It is meant to be used in two scenarios: + - During live migration to save the CMMA values. Live migration needs to be enabled via the KVM_REQ_START_MIGRATION VM property. - To non-destructively peek at the CMMA values, with the flag @@ -3652,9 +4040,12 @@ The ioctl takes parameters via the kvm_s390_cmma_log struct. The desired values are written to a buffer whose location is indicated via the "values" member in the kvm_s390_cmma_log struct. The values in the input struct are also updated as needed. + Each CMMA value takes up one byte. -struct kvm_s390_cmma_log { +:: + + struct kvm_s390_cmma_log { __u64 start_gfn; __u32 count; __u32 flags; @@ -3663,7 +4054,7 @@ struct kvm_s390_cmma_log { __u64 mask; }; __u64 values; -}; + }; start_gfn is the number of the first guest frame whose CMMA values are to be retrieved, @@ -3724,12 +4115,13 @@ KVM_S390_CMMA_PEEK is not set but migration mode was not enabled, with present for the addresses (e.g. when using hugepages). 4.108 KVM_S390_SET_CMMA_BITS +---------------------------- -Capability: KVM_CAP_S390_CMMA_MIGRATION -Architectures: s390 -Type: vm ioctl -Parameters: struct kvm_s390_cmma_log (in) -Returns: 0 on success, a negative value on error +:Capability: KVM_CAP_S390_CMMA_MIGRATION +:Architectures: s390 +:Type: vm ioctl +:Parameters: struct kvm_s390_cmma_log (in) +:Returns: 0 on success, a negative value on error This ioctl is used to set the values of the CMMA bits on the s390 architecture. It is meant to be used during live migration to restore @@ -3737,16 +4129,18 @@ the CMMA values, but there are no restrictions on its use. The ioctl takes parameters via the kvm_s390_cmma_values struct. Each CMMA value takes up one byte. -struct kvm_s390_cmma_log { +:: + + struct kvm_s390_cmma_log { __u64 start_gfn; __u32 count; __u32 flags; union { __u64 remaining; __u64 mask; - }; + }; __u64 values; -}; + }; start_gfn indicates the starting guest frame number, @@ -3769,26 +4163,27 @@ or if no page table is present for the addresses (e.g. when using hugepages). 4.109 KVM_PPC_GET_CPU_CHAR +-------------------------- -Capability: KVM_CAP_PPC_GET_CPU_CHAR -Architectures: powerpc -Type: vm ioctl -Parameters: struct kvm_ppc_cpu_char (out) -Returns: 0 on successful completion +:Capability: KVM_CAP_PPC_GET_CPU_CHAR +:Architectures: powerpc +:Type: vm ioctl +:Parameters: struct kvm_ppc_cpu_char (out) +:Returns: 0 on successful completion, -EFAULT if struct kvm_ppc_cpu_char cannot be written This ioctl gives userspace information about certain characteristics of the CPU relating to speculative execution of instructions and possible information leakage resulting from speculative execution (see CVE-2017-5715, CVE-2017-5753 and CVE-2017-5754). The information is -returned in struct kvm_ppc_cpu_char, which looks like this: +returned in struct kvm_ppc_cpu_char, which looks like this:: -struct kvm_ppc_cpu_char { + struct kvm_ppc_cpu_char { __u64 character; /* characteristics of the CPU */ __u64 behaviour; /* recommended software behaviour */ __u64 character_mask; /* valid bits in character */ __u64 behaviour_mask; /* valid bits in behaviour */ -}; + }; For extensibility, the character_mask and behaviour_mask fields indicate which bits of character and behaviour have been filled in by @@ -3815,12 +4210,13 @@ These fields use the same bit definitions as the new H_GET_CPU_CHARACTERISTICS hypercall. 4.110 KVM_MEMORY_ENCRYPT_OP +--------------------------- -Capability: basic -Architectures: x86 -Type: system -Parameters: an opaque platform specific structure (in/out) -Returns: 0 on success; -1 on error +:Capability: basic +:Architectures: x86 +:Type: system +:Parameters: an opaque platform specific structure (in/out) +:Returns: 0 on success; -1 on error If the platform supports creating encrypted VMs then this ioctl can be used for issuing platform-specific memory encryption commands to manage those @@ -3831,12 +4227,13 @@ Currently, this ioctl is used for issuing Secure Encrypted Virtualization Documentation/virt/kvm/amd-memory-encryption.rst. 4.111 KVM_MEMORY_ENCRYPT_REG_REGION +----------------------------------- -Capability: basic -Architectures: x86 -Type: system -Parameters: struct kvm_enc_region (in) -Returns: 0 on success; -1 on error +:Capability: basic +:Architectures: x86 +:Type: system +:Parameters: struct kvm_enc_region (in) +:Returns: 0 on success; -1 on error This ioctl can be used to register a guest memory region which may contain encrypted data (e.g. guest RAM, SMRAM etc). @@ -3854,60 +4251,71 @@ swap or migrate (move) ciphertext pages. Hence, for now we pin the guest memory region registered with the ioctl. 4.112 KVM_MEMORY_ENCRYPT_UNREG_REGION +------------------------------------- -Capability: basic -Architectures: x86 -Type: system -Parameters: struct kvm_enc_region (in) -Returns: 0 on success; -1 on error +:Capability: basic +:Architectures: x86 +:Type: system +:Parameters: struct kvm_enc_region (in) +:Returns: 0 on success; -1 on error This ioctl can be used to unregister the guest memory region registered with KVM_MEMORY_ENCRYPT_REG_REGION ioctl above. 4.113 KVM_HYPERV_EVENTFD +------------------------ -Capability: KVM_CAP_HYPERV_EVENTFD -Architectures: x86 -Type: vm ioctl -Parameters: struct kvm_hyperv_eventfd (in) +:Capability: KVM_CAP_HYPERV_EVENTFD +:Architectures: x86 +:Type: vm ioctl +:Parameters: struct kvm_hyperv_eventfd (in) This ioctl (un)registers an eventfd to receive notifications from the guest on the specified Hyper-V connection id through the SIGNAL_EVENT hypercall, without causing a user exit. SIGNAL_EVENT hypercall with non-zero event flag number (bits 24-31) still triggers a KVM_EXIT_HYPERV_HCALL user exit. -struct kvm_hyperv_eventfd { +:: + + struct kvm_hyperv_eventfd { __u32 conn_id; __s32 fd; __u32 flags; __u32 padding[3]; -}; + }; -The conn_id field should fit within 24 bits: +The conn_id field should fit within 24 bits:: -#define KVM_HYPERV_CONN_ID_MASK 0x00ffffff + #define KVM_HYPERV_CONN_ID_MASK 0x00ffffff -The acceptable values for the flags field are: +The acceptable values for the flags field are:: -#define KVM_HYPERV_EVENTFD_DEASSIGN (1 << 0) + #define KVM_HYPERV_EVENTFD_DEASSIGN (1 << 0) -Returns: 0 on success, - -EINVAL if conn_id or flags is outside the allowed range - -ENOENT on deassign if the conn_id isn't registered - -EEXIST on assign if the conn_id is already registered +:Returns: 0 on success, + -EINVAL if conn_id or flags is outside the allowed range, + -ENOENT on deassign if the conn_id isn't registered, + -EEXIST on assign if the conn_id is already registered 4.114 KVM_GET_NESTED_STATE +-------------------------- + +:Capability: KVM_CAP_NESTED_STATE +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: struct kvm_nested_state (in/out) +:Returns: 0 on success, -1 on error -Capability: KVM_CAP_NESTED_STATE -Architectures: x86 -Type: vcpu ioctl -Parameters: struct kvm_nested_state (in/out) -Returns: 0 on success, -1 on error Errors: - E2BIG: the total state size exceeds the value of 'size' specified by + + ===== ============================================================= + E2BIG the total state size exceeds the value of 'size' specified by the user; the size required will be written into size. + ===== ============================================================= -struct kvm_nested_state { +:: + + struct kvm_nested_state { __u16 flags; __u16 format; __u32 size; @@ -3924,33 +4332,33 @@ struct kvm_nested_state { struct kvm_vmx_nested_state_data vmx[0]; struct kvm_svm_nested_state_data svm[0]; } data; -}; + }; -#define KVM_STATE_NESTED_GUEST_MODE 0x00000001 -#define KVM_STATE_NESTED_RUN_PENDING 0x00000002 -#define KVM_STATE_NESTED_EVMCS 0x00000004 + #define KVM_STATE_NESTED_GUEST_MODE 0x00000001 + #define KVM_STATE_NESTED_RUN_PENDING 0x00000002 + #define KVM_STATE_NESTED_EVMCS 0x00000004 -#define KVM_STATE_NESTED_FORMAT_VMX 0 -#define KVM_STATE_NESTED_FORMAT_SVM 1 + #define KVM_STATE_NESTED_FORMAT_VMX 0 + #define KVM_STATE_NESTED_FORMAT_SVM 1 -#define KVM_STATE_NESTED_VMX_VMCS_SIZE 0x1000 + #define KVM_STATE_NESTED_VMX_VMCS_SIZE 0x1000 -#define KVM_STATE_NESTED_VMX_SMM_GUEST_MODE 0x00000001 -#define KVM_STATE_NESTED_VMX_SMM_VMXON 0x00000002 + #define KVM_STATE_NESTED_VMX_SMM_GUEST_MODE 0x00000001 + #define KVM_STATE_NESTED_VMX_SMM_VMXON 0x00000002 -struct kvm_vmx_nested_state_hdr { + struct kvm_vmx_nested_state_hdr { __u64 vmxon_pa; __u64 vmcs12_pa; struct { __u16 flags; } smm; -}; + }; -struct kvm_vmx_nested_state_data { + struct kvm_vmx_nested_state_data { __u8 vmcs12[KVM_STATE_NESTED_VMX_VMCS_SIZE]; __u8 shadow_vmcs12[KVM_STATE_NESTED_VMX_VMCS_SIZE]; -}; + }; This ioctl copies the vcpu's nested virtualization state from the kernel to userspace. @@ -3959,24 +4367,26 @@ The maximum size of the state can be retrieved by passing KVM_CAP_NESTED_STATE to the KVM_CHECK_EXTENSION ioctl(). 4.115 KVM_SET_NESTED_STATE +-------------------------- -Capability: KVM_CAP_NESTED_STATE -Architectures: x86 -Type: vcpu ioctl -Parameters: struct kvm_nested_state (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_NESTED_STATE +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: struct kvm_nested_state (in) +:Returns: 0 on success, -1 on error This copies the vcpu's kvm_nested_state struct from userspace to the kernel. For the definition of struct kvm_nested_state, see KVM_GET_NESTED_STATE. 4.116 KVM_(UN)REGISTER_COALESCED_MMIO +------------------------------------- -Capability: KVM_CAP_COALESCED_MMIO (for coalesced mmio) - KVM_CAP_COALESCED_PIO (for coalesced pio) -Architectures: all -Type: vm ioctl -Parameters: struct kvm_coalesced_mmio_zone -Returns: 0 on success, < 0 on error +:Capability: KVM_CAP_COALESCED_MMIO (for coalesced mmio) + KVM_CAP_COALESCED_PIO (for coalesced pio) +:Architectures: all +:Type: vm ioctl +:Parameters: struct kvm_coalesced_mmio_zone +:Returns: 0 on success, < 0 on error Coalesced I/O is a performance optimization that defers hardware register write emulation so that userspace exits are avoided. It is @@ -3998,15 +4408,18 @@ between coalesced mmio and pio except that coalesced pio records accesses to I/O ports. 4.117 KVM_CLEAR_DIRTY_LOG (vm ioctl) +------------------------------------ + +:Capability: KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 +:Architectures: x86, arm, arm64, mips +:Type: vm ioctl +:Parameters: struct kvm_dirty_log (in) +:Returns: 0 on success, -1 on error -Capability: KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 -Architectures: x86, arm, arm64, mips -Type: vm ioctl -Parameters: struct kvm_dirty_log (in) -Returns: 0 on success, -1 on error +:: -/* for KVM_CLEAR_DIRTY_LOG */ -struct kvm_clear_dirty_log { + /* for KVM_CLEAR_DIRTY_LOG */ + struct kvm_clear_dirty_log { __u32 slot; __u32 num_pages; __u64 first_page; @@ -4014,7 +4427,7 @@ struct kvm_clear_dirty_log { void __user *dirty_bitmap; /* one bit per page */ __u64 padding; }; -}; + }; The ioctl clears the dirty status of pages in a memory slot, according to the bitmap that is passed in struct kvm_clear_dirty_log's dirty_bitmap @@ -4038,20 +4451,23 @@ However, it can always be used as long as KVM_CHECK_EXTENSION confirms that KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 is present. 4.118 KVM_GET_SUPPORTED_HV_CPUID +-------------------------------- -Capability: KVM_CAP_HYPERV_CPUID -Architectures: x86 -Type: vcpu ioctl -Parameters: struct kvm_cpuid2 (in/out) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_HYPERV_CPUID +:Architectures: x86 +:Type: vcpu ioctl +:Parameters: struct kvm_cpuid2 (in/out) +:Returns: 0 on success, -1 on error + +:: -struct kvm_cpuid2 { + struct kvm_cpuid2 { __u32 nent; __u32 padding; struct kvm_cpuid_entry2 entries[0]; -}; + }; -struct kvm_cpuid_entry2 { + struct kvm_cpuid_entry2 { __u32 function; __u32 index; __u32 flags; @@ -4060,7 +4476,7 @@ struct kvm_cpuid_entry2 { __u32 ecx; __u32 edx; __u32 padding[3]; -}; + }; This ioctl returns x86 cpuid features leaves related to Hyper-V emulation in KVM. Userspace can use the information returned by this ioctl to construct @@ -4073,13 +4489,13 @@ KVM_GET_SUPPORTED_CPUID ioctl because some of them intersect with KVM feature leaves (0x40000000, 0x40000001). Currently, the following list of CPUID leaves are returned: - HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS - HYPERV_CPUID_INTERFACE - HYPERV_CPUID_VERSION - HYPERV_CPUID_FEATURES - HYPERV_CPUID_ENLIGHTMENT_INFO - HYPERV_CPUID_IMPLEMENT_LIMITS - HYPERV_CPUID_NESTED_FEATURES + - HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS + - HYPERV_CPUID_INTERFACE + - HYPERV_CPUID_VERSION + - HYPERV_CPUID_FEATURES + - HYPERV_CPUID_ENLIGHTMENT_INFO + - HYPERV_CPUID_IMPLEMENT_LIMITS + - HYPERV_CPUID_NESTED_FEATURES HYPERV_CPUID_NESTED_FEATURES leaf is only exposed when Enlightened VMCS was enabled on the corresponding vCPU (KVM_CAP_HYPERV_ENLIGHTENED_VMCS). @@ -4095,17 +4511,25 @@ number of valid entries in the 'entries' array, which is then filled. userspace should not expect to get any particular value there. 4.119 KVM_ARM_VCPU_FINALIZE +--------------------------- + +:Architectures: arm, arm64 +:Type: vcpu ioctl +:Parameters: int feature (in) +:Returns: 0 on success, -1 on error -Architectures: arm, arm64 -Type: vcpu ioctl -Parameters: int feature (in) -Returns: 0 on success, -1 on error Errors: - EPERM: feature not enabled, needs configuration, or already finalized - EINVAL: feature unknown or not present + + ====== ============================================================== + EPERM feature not enabled, needs configuration, or already finalized + EINVAL feature unknown or not present + ====== ============================================================== Recognised values for feature: + + ===== =========================================== arm64 KVM_ARM_VCPU_SVE (requires KVM_CAP_ARM_SVE) + ===== =========================================== Finalizes the configuration of the specified vcpu feature. @@ -4129,21 +4553,24 @@ See KVM_ARM_VCPU_INIT for details of vcpu features that require finalization using this ioctl. 4.120 KVM_SET_PMU_EVENT_FILTER +------------------------------ -Capability: KVM_CAP_PMU_EVENT_FILTER -Architectures: x86 -Type: vm ioctl -Parameters: struct kvm_pmu_event_filter (in) -Returns: 0 on success, -1 on error +:Capability: KVM_CAP_PMU_EVENT_FILTER +:Architectures: x86 +:Type: vm ioctl +:Parameters: struct kvm_pmu_event_filter (in) +:Returns: 0 on success, -1 on error -struct kvm_pmu_event_filter { +:: + + struct kvm_pmu_event_filter { __u32 action; __u32 nevents; __u32 fixed_counter_bitmap; __u32 flags; __u32 pad[4]; __u64 events[0]; -}; + }; This ioctl restricts the set of PMU events that the guest can program. The argument holds a list of events which will be allowed or denied. @@ -4154,20 +4581,26 @@ counters are controlled by the fixed_counter_bitmap. No flags are defined yet, the field must be zero. -Valid values for 'action': -#define KVM_PMU_EVENT_ALLOW 0 -#define KVM_PMU_EVENT_DENY 1 +Valid values for 'action':: + + #define KVM_PMU_EVENT_ALLOW 0 + #define KVM_PMU_EVENT_DENY 1 4.121 KVM_PPC_SVM_OFF +--------------------- + +:Capability: basic +:Architectures: powerpc +:Type: vm ioctl +:Parameters: none +:Returns: 0 on successful completion, -Capability: basic -Architectures: powerpc -Type: vm ioctl -Parameters: none -Returns: 0 on successful completion, Errors: - EINVAL: if ultravisor failed to terminate the secure guest - ENOMEM: if hypervisor failed to allocate new radix page tables for guest + + ====== ================================================================ + EINVAL if ultravisor failed to terminate the secure guest + ENOMEM if hypervisor failed to allocate new radix page tables for guest + ====== ================================================================ This ioctl is used to turn off the secure mode of the guest or transition the guest from secure mode to normal mode. This is invoked when the guest @@ -4214,7 +4647,7 @@ into ESA mode. This reset is a superset of the initial reset. 5. The kvm_run structure ------------------------- +======================== Application code obtains a pointer to the kvm_run structure by mmap()ing a vcpu fd. From that point, application code can control @@ -4222,13 +4655,17 @@ execution by changing fields in kvm_run prior to calling the KVM_RUN ioctl, and obtain information about the reason KVM_RUN returned by looking up structure members. -struct kvm_run { +:: + + struct kvm_run { /* in */ __u8 request_interrupt_window; Request that KVM_RUN return when it becomes possible to inject external interrupts into the guest. Useful in conjunction with KVM_INTERRUPT. +:: + __u8 immediate_exit; This field is polled once when KVM_RUN starts; if non-zero, KVM_RUN @@ -4240,6 +4677,8 @@ a signal handler that sets run->immediate_exit to a non-zero value. This field is ignored if KVM_CAP_IMMEDIATE_EXIT is not available. +:: + __u8 padding1[6]; /* out */ @@ -4249,16 +4688,22 @@ When KVM_RUN has returned successfully (return value 0), this informs application code why KVM_RUN has returned. Allowable values for this field are detailed below. +:: + __u8 ready_for_interrupt_injection; If request_interrupt_window has been specified, this field indicates an interrupt can be injected now with KVM_INTERRUPT. +:: + __u8 if_flag; The value of the current interrupt flag. Only valid if in-kernel local APIC is not used. +:: + __u16 flags; More architecture-specific flags detailing state of the VCPU that may @@ -4266,17 +4711,23 @@ affect the device's behavior. The only currently defined flag is KVM_RUN_X86_SMM, which is valid on x86 machines and is set if the VCPU is in system management mode. +:: + /* in (pre_kvm_run), out (post_kvm_run) */ __u64 cr8; The value of the cr8 register. Only valid if in-kernel local APIC is not used. Both input and output. +:: + __u64 apic_base; The value of the APIC BASE msr. Only valid if in-kernel local APIC is not used. Both input and output. +:: + union { /* KVM_EXIT_UNKNOWN */ struct { @@ -4287,6 +4738,8 @@ If exit_reason is KVM_EXIT_UNKNOWN, the vcpu has exited due to unknown reasons. Further architecture-specific information is available in hardware_exit_reason. +:: + /* KVM_EXIT_FAIL_ENTRY */ struct { __u64 hardware_entry_failure_reason; @@ -4296,6 +4749,8 @@ If exit_reason is KVM_EXIT_FAIL_ENTRY, the vcpu could not be run due to unknown reasons. Further architecture-specific information is available in hardware_entry_failure_reason. +:: + /* KVM_EXIT_EXCEPTION */ struct { __u32 exception; @@ -4304,10 +4759,12 @@ available in hardware_entry_failure_reason. Unused. +:: + /* KVM_EXIT_IO */ struct { -#define KVM_EXIT_IO_IN 0 -#define KVM_EXIT_IO_OUT 1 + #define KVM_EXIT_IO_IN 0 + #define KVM_EXIT_IO_OUT 1 __u8 direction; __u8 size; /* bytes */ __u16 port; @@ -4321,6 +4778,8 @@ data_offset describes where the data is located (KVM_EXIT_IO_OUT) or where kvm expects application code to place the data for the next KVM_RUN invocation (KVM_EXIT_IO_IN). Data format is a packed array. +:: + /* KVM_EXIT_DEBUG */ struct { struct kvm_debug_exit_arch arch; @@ -4329,6 +4788,8 @@ KVM_RUN invocation (KVM_EXIT_IO_IN). Data format is a packed array. If the exit_reason is KVM_EXIT_DEBUG, then a vcpu is processing a debug event for which architecture specific information is returned. +:: + /* KVM_EXIT_MMIO */ struct { __u64 phys_addr; @@ -4346,14 +4807,19 @@ The 'data' member contains, in its first 'len' bytes, the value as it would appear if the VCPU performed a load or store of the appropriate width directly to the byte array. -NOTE: For KVM_EXIT_IO, KVM_EXIT_MMIO, KVM_EXIT_OSI, KVM_EXIT_PAPR and +.. note:: + + For KVM_EXIT_IO, KVM_EXIT_MMIO, KVM_EXIT_OSI, KVM_EXIT_PAPR and KVM_EXIT_EPR the corresponding + operations are complete (and guest state is consistent) only after userspace has re-entered the kernel with KVM_RUN. The kernel side will first finish incomplete operations and then check for pending signals. Userspace can re-enter the guest with an unmasked signal pending to complete pending operations. +:: + /* KVM_EXIT_HYPERCALL */ struct { __u64 nr; @@ -4365,7 +4831,10 @@ pending operations. Unused. This was once used for 'hypercall to userspace'. To implement such functionality, use KVM_EXIT_IO (x86) or KVM_EXIT_MMIO (all except s390). -Note KVM_EXIT_IO is significantly faster than KVM_EXIT_MMIO. + +.. note:: KVM_EXIT_IO is significantly faster than KVM_EXIT_MMIO. + +:: /* KVM_EXIT_TPR_ACCESS */ struct { @@ -4376,6 +4845,8 @@ Note KVM_EXIT_IO is significantly faster than KVM_EXIT_MMIO. To be documented (KVM_TPR_ACCESS_REPORTING). +:: + /* KVM_EXIT_S390_SIEIC */ struct { __u8 icptcode; @@ -4387,16 +4858,20 @@ To be documented (KVM_TPR_ACCESS_REPORTING). s390 specific. +:: + /* KVM_EXIT_S390_RESET */ -#define KVM_S390_RESET_POR 1 -#define KVM_S390_RESET_CLEAR 2 -#define KVM_S390_RESET_SUBSYSTEM 4 -#define KVM_S390_RESET_CPU_INIT 8 -#define KVM_S390_RESET_IPL 16 + #define KVM_S390_RESET_POR 1 + #define KVM_S390_RESET_CLEAR 2 + #define KVM_S390_RESET_SUBSYSTEM 4 + #define KVM_S390_RESET_CPU_INIT 8 + #define KVM_S390_RESET_IPL 16 __u64 s390_reset_flags; s390 specific. +:: + /* KVM_EXIT_S390_UCONTROL */ struct { __u64 trans_exc_code; @@ -4411,6 +4886,8 @@ in the cpu's lowcore are presented here as defined by the z Architecture Principles of Operation Book in the Chapter for Dynamic Address Translation (DAT) +:: + /* KVM_EXIT_DCR */ struct { __u32 dcrn; @@ -4420,6 +4897,8 @@ Principles of Operation Book in the Chapter for Dynamic Address Translation Deprecated - was used for 440 KVM. +:: + /* KVM_EXIT_OSI */ struct { __u64 gprs[32]; @@ -4433,6 +4912,8 @@ Userspace can now handle the hypercall and when it's done modify the gprs as necessary. Upon guest entry all guest GPRs will then be replaced by the values in this struct. +:: + /* KVM_EXIT_PAPR_HCALL */ struct { __u64 nr; @@ -4450,6 +4931,8 @@ The possible hypercalls are defined in the Power Architecture Platform Requirements (PAPR) document available from www.power.org (free developer registration required to access it). +:: + /* KVM_EXIT_S390_TSCH */ struct { __u16 subchannel_id; @@ -4466,6 +4949,8 @@ interrupt for the target subchannel has been dequeued and subchannel_id, subchannel_nr, io_int_parm and io_int_word contain the parameters for that interrupt. ipb is needed for instruction parameter decoding. +:: + /* KVM_EXIT_EPR */ struct { __u32 epr; @@ -4485,11 +4970,13 @@ It gets triggered whenever both KVM_CAP_PPC_EPR are enabled and an external interrupt has just been delivered into the guest. User space should put the acknowledged interrupt vector into the 'epr' field. +:: + /* KVM_EXIT_SYSTEM_EVENT */ struct { -#define KVM_SYSTEM_EVENT_SHUTDOWN 1 -#define KVM_SYSTEM_EVENT_RESET 2 -#define KVM_SYSTEM_EVENT_CRASH 3 + #define KVM_SYSTEM_EVENT_SHUTDOWN 1 + #define KVM_SYSTEM_EVENT_RESET 2 + #define KVM_SYSTEM_EVENT_CRASH 3 __u32 type; __u64 flags; } system_event; @@ -4502,18 +4989,21 @@ the system-level event type. The 'flags' field describes architecture specific flags for the system-level event. Valid values for 'type' are: - KVM_SYSTEM_EVENT_SHUTDOWN -- the guest has requested a shutdown of the + + - KVM_SYSTEM_EVENT_SHUTDOWN -- the guest has requested a shutdown of the VM. Userspace is not obliged to honour this, and if it does honour this does not need to destroy the VM synchronously (ie it may call KVM_RUN again before shutdown finally occurs). - KVM_SYSTEM_EVENT_RESET -- the guest has requested a reset of the VM. + - KVM_SYSTEM_EVENT_RESET -- the guest has requested a reset of the VM. As with SHUTDOWN, userspace can choose to ignore the request, or to schedule the reset to occur in the future and may call KVM_RUN again. - KVM_SYSTEM_EVENT_CRASH -- the guest crash occurred and the guest + - KVM_SYSTEM_EVENT_CRASH -- the guest crash occurred and the guest has requested a crash condition maintenance. Userspace can choose to ignore the request, or to gather VM memory core dump and/or reset/shutdown of the VM. +:: + /* KVM_EXIT_IOAPIC_EOI */ struct { __u8 vector; @@ -4526,9 +5016,11 @@ the userspace IOAPIC should process the EOI and retrigger the interrupt if it is still asserted. Vector is the LAPIC interrupt vector for which the EOI was received. +:: + struct kvm_hyperv_exit { -#define KVM_EXIT_HYPERV_SYNIC 1 -#define KVM_EXIT_HYPERV_HCALL 2 + #define KVM_EXIT_HYPERV_SYNIC 1 + #define KVM_EXIT_HYPERV_HCALL 2 __u32 type; union { struct { @@ -4546,14 +5038,20 @@ EOI was received. }; /* KVM_EXIT_HYPERV */ struct kvm_hyperv_exit hyperv; + Indicates that the VCPU exits into userspace to process some tasks related to Hyper-V emulation. + Valid values for 'type' are: - KVM_EXIT_HYPERV_SYNIC -- synchronously notify user-space about + + - KVM_EXIT_HYPERV_SYNIC -- synchronously notify user-space about + Hyper-V SynIC state change. Notification is used to remap SynIC event/message pages and to enable/disable SynIC messages/events processing in userspace. +:: + /* KVM_EXIT_ARM_NISV */ struct { __u64 esr_iss; @@ -4587,6 +5085,8 @@ Note that KVM does not skip the faulting instruction as it does for KVM_EXIT_MMIO, but userspace has to emulate any change to the processing state if it decides to decode and emulate the instruction. +:: + /* Fix the size of the union. */ char padding[256]; }; @@ -4611,18 +5111,20 @@ avoid some system call overhead if userspace has to handle the exit. Userspace can query the validity of the structure by checking kvm_valid_regs for specific bits. These bits are architecture specific and usually define the validity of a groups of registers. (e.g. one bit - for general purpose registers) +for general purpose registers) Please note that the kernel is allowed to use the kvm_run structure as the primary storage for certain register types. Therefore, the kernel may use the values in kvm_run even if the corresponding bit in kvm_dirty_regs is not set. -}; +:: + + }; 6. Capabilities that can be enabled on vCPUs --------------------------------------------- +============================================ There are certain capabilities that change the behavior of the virtual CPU or the virtual machine when enabled. To enable them, please see section 4.37. @@ -4631,23 +5133,28 @@ the virtual machine is when enabling them. The following information is provided along with the description: - Architectures: which instruction set architectures provide this ioctl. + Architectures: + which instruction set architectures provide this ioctl. x86 includes both i386 and x86_64. - Target: whether this is a per-vcpu or per-vm capability. + Target: + whether this is a per-vcpu or per-vm capability. - Parameters: what parameters are accepted by the capability. + Parameters: + what parameters are accepted by the capability. - Returns: the return value. General error numbers (EBADF, ENOMEM, EINVAL) + Returns: + the return value. General error numbers (EBADF, ENOMEM, EINVAL) are not detailed, but errors with specific meanings are. 6.1 KVM_CAP_PPC_OSI +------------------- -Architectures: ppc -Target: vcpu -Parameters: none -Returns: 0 on success; -1 on error +:Architectures: ppc +:Target: vcpu +:Parameters: none +:Returns: 0 on success; -1 on error This capability enables interception of OSI hypercalls that otherwise would be treated as normal system calls to be injected into the guest. OSI hypercalls @@ -4658,11 +5165,12 @@ When this capability is enabled, KVM_EXIT_OSI can occur. 6.2 KVM_CAP_PPC_PAPR +-------------------- -Architectures: ppc -Target: vcpu -Parameters: none -Returns: 0 on success; -1 on error +:Architectures: ppc +:Target: vcpu +:Parameters: none +:Returns: 0 on success; -1 on error This capability enables interception of PAPR hypercalls. PAPR hypercalls are done using the hypercall instruction "sc 1". @@ -4678,18 +5186,21 @@ When this capability is enabled, KVM_EXIT_PAPR_HCALL can occur. 6.3 KVM_CAP_SW_TLB +------------------ + +:Architectures: ppc +:Target: vcpu +:Parameters: args[0] is the address of a struct kvm_config_tlb +:Returns: 0 on success; -1 on error -Architectures: ppc -Target: vcpu -Parameters: args[0] is the address of a struct kvm_config_tlb -Returns: 0 on success; -1 on error +:: -struct kvm_config_tlb { + struct kvm_config_tlb { __u64 params; __u64 array; __u32 mmu_type; __u32 array_len; -}; + }; Configures the virtual CPU's TLB array, establishing a shared memory area between userspace and KVM. The "params" and "array" fields are userspace @@ -4708,6 +5219,7 @@ to tell KVM which entries have been changed, prior to calling KVM_RUN again on this vcpu. For mmu types KVM_MMU_FSL_BOOKE_NOHV and KVM_MMU_FSL_BOOKE_HV: + - The "params" field is of type "struct kvm_book3e_206_tlb_params". - The "array" field points to an array of type "struct kvm_book3e_206_tlb_entry". @@ -4721,11 +5233,12 @@ For mmu types KVM_MMU_FSL_BOOKE_NOHV and KVM_MMU_FSL_BOOKE_HV: hardware ignores this value for TLB0. 6.4 KVM_CAP_S390_CSS_SUPPORT +---------------------------- -Architectures: s390 -Target: vcpu -Parameters: none -Returns: 0 on success; -1 on error +:Architectures: s390 +:Target: vcpu +:Parameters: none +:Returns: 0 on success; -1 on error This capability enables support for handling of channel I/O instructions. @@ -4739,11 +5252,12 @@ Note that even though this capability is enabled per-vcpu, the complete virtual machine is affected. 6.5 KVM_CAP_PPC_EPR +------------------- -Architectures: ppc -Target: vcpu -Parameters: args[0] defines whether the proxy facility is active -Returns: 0 on success; -1 on error +:Architectures: ppc +:Target: vcpu +:Parameters: args[0] defines whether the proxy facility is active +:Returns: 0 on success; -1 on error This capability enables or disables the delivery of interrupts through the external proxy facility. @@ -4757,62 +5271,70 @@ When disabled (args[0] == 0), behavior is as if this facility is unsupported. When this capability is enabled, KVM_EXIT_EPR can occur. 6.6 KVM_CAP_IRQ_MPIC +-------------------- -Architectures: ppc -Parameters: args[0] is the MPIC device fd - args[1] is the MPIC CPU number for this vcpu +:Architectures: ppc +:Parameters: args[0] is the MPIC device fd; + args[1] is the MPIC CPU number for this vcpu This capability connects the vcpu to an in-kernel MPIC device. 6.7 KVM_CAP_IRQ_XICS +-------------------- -Architectures: ppc -Target: vcpu -Parameters: args[0] is the XICS device fd - args[1] is the XICS CPU number (server ID) for this vcpu +:Architectures: ppc +:Target: vcpu +:Parameters: args[0] is the XICS device fd; + args[1] is the XICS CPU number (server ID) for this vcpu This capability connects the vcpu to an in-kernel XICS device. 6.8 KVM_CAP_S390_IRQCHIP +------------------------ -Architectures: s390 -Target: vm -Parameters: none +:Architectures: s390 +:Target: vm +:Parameters: none This capability enables the in-kernel irqchip for s390. Please refer to "4.24 KVM_CREATE_IRQCHIP" for details. 6.9 KVM_CAP_MIPS_FPU +-------------------- -Architectures: mips -Target: vcpu -Parameters: args[0] is reserved for future use (should be 0). +:Architectures: mips +:Target: vcpu +:Parameters: args[0] is reserved for future use (should be 0). This capability allows the use of the host Floating Point Unit by the guest. It allows the Config1.FP bit to be set to enable the FPU in the guest. Once this is -done the KVM_REG_MIPS_FPR_* and KVM_REG_MIPS_FCR_* registers can be accessed -(depending on the current guest FPU register mode), and the Status.FR, +done the ``KVM_REG_MIPS_FPR_*`` and ``KVM_REG_MIPS_FCR_*`` registers can be +accessed (depending on the current guest FPU register mode), and the Status.FR, Config5.FRE bits are accessible via the KVM API and also from the guest, depending on them being supported by the FPU. 6.10 KVM_CAP_MIPS_MSA +--------------------- -Architectures: mips -Target: vcpu -Parameters: args[0] is reserved for future use (should be 0). +:Architectures: mips +:Target: vcpu +:Parameters: args[0] is reserved for future use (should be 0). This capability allows the use of the MIPS SIMD Architecture (MSA) by the guest. It allows the Config3.MSAP bit to be set to enable the use of MSA by the guest. -Once this is done the KVM_REG_MIPS_VEC_* and KVM_REG_MIPS_MSA_* registers can be -accessed, and the Config5.MSAEn bit is accessible via the KVM API and also from -the guest. +Once this is done the ``KVM_REG_MIPS_VEC_*`` and ``KVM_REG_MIPS_MSA_*`` +registers can be accessed, and the Config5.MSAEn bit is accessible via the +KVM API and also from the guest. 6.74 KVM_CAP_SYNC_REGS -Architectures: s390, x86 -Target: s390: always enabled, x86: vcpu -Parameters: none -Returns: x86: KVM_CHECK_EXTENSION returns a bit-array indicating which register -sets are supported (bitfields defined in arch/x86/include/uapi/asm/kvm.h). +---------------------- + +:Architectures: s390, x86 +:Target: s390: always enabled, x86: vcpu +:Parameters: none +:Returns: x86: KVM_CHECK_EXTENSION returns a bit-array indicating which register + sets are supported + (bitfields defined in arch/x86/include/uapi/asm/kvm.h). As described above in the kvm_sync_regs struct info in section 5 (kvm_run): KVM_CAP_SYNC_REGS "allow[s] userspace to access certain guest registers @@ -4825,6 +5347,7 @@ userspace. For s390 specifics, please refer to the source code. For x86: + - the register sets to be copied out to kvm_run are selectable by userspace (rather that all sets being copied out for every exit). - vcpu_events are available in addition to regs and sregs. @@ -4841,23 +5364,26 @@ into the vCPU even if they've been modified. Unused bitfields in the bitarrays must be set to zero. -struct kvm_sync_regs { +:: + + struct kvm_sync_regs { struct kvm_regs regs; struct kvm_sregs sregs; struct kvm_vcpu_events events; -}; + }; 6.75 KVM_CAP_PPC_IRQ_XIVE +------------------------- -Architectures: ppc -Target: vcpu -Parameters: args[0] is the XIVE device fd - args[1] is the XIVE CPU number (server ID) for this vcpu +:Architectures: ppc +:Target: vcpu +:Parameters: args[0] is the XIVE device fd; + args[1] is the XIVE CPU number (server ID) for this vcpu This capability connects the vcpu to an in-kernel XIVE device. 7. Capabilities that can be enabled on VMs ------------------------------------------- +========================================== There are certain capabilities that change the behavior of the virtual machine when enabled. To enable them, please see section 4.37. Below @@ -4866,20 +5392,24 @@ is when enabling them. The following information is provided along with the description: - Architectures: which instruction set architectures provide this ioctl. + Architectures: + which instruction set architectures provide this ioctl. x86 includes both i386 and x86_64. - Parameters: what parameters are accepted by the capability. + Parameters: + what parameters are accepted by the capability. - Returns: the return value. General error numbers (EBADF, ENOMEM, EINVAL) + Returns: + the return value. General error numbers (EBADF, ENOMEM, EINVAL) are not detailed, but errors with specific meanings are. 7.1 KVM_CAP_PPC_ENABLE_HCALL +---------------------------- -Architectures: ppc -Parameters: args[0] is the sPAPR hcall number - args[1] is 0 to disable, 1 to enable in-kernel handling +:Architectures: ppc +:Parameters: args[0] is the sPAPR hcall number; + args[1] is 0 to disable, 1 to enable in-kernel handling This capability controls whether individual sPAPR hypercalls (hcalls) get handled by the kernel or not. Enabling or disabling in-kernel @@ -4897,13 +5427,15 @@ implementation, the KVM_ENABLE_CAP ioctl will fail with an EINVAL error. 7.2 KVM_CAP_S390_USER_SIGP +-------------------------- -Architectures: s390 -Parameters: none +:Architectures: s390 +:Parameters: none This capability controls which SIGP orders will be handled completely in user space. With this capability enabled, all fast orders will be handled completely in the kernel: + - SENSE - SENSE RUNNING - EXTERNAL CALL @@ -4917,48 +5449,52 @@ in the hardware prior to interception). If this capability is not enabled, the old way of handling SIGP orders is used (partially in kernel and user space). 7.3 KVM_CAP_S390_VECTOR_REGISTERS +--------------------------------- -Architectures: s390 -Parameters: none -Returns: 0 on success, negative value on error +:Architectures: s390 +:Parameters: none +:Returns: 0 on success, negative value on error Allows use of the vector registers introduced with z13 processor, and provides for the synchronization between host and user space. Will return -EINVAL if the machine does not support vectors. 7.4 KVM_CAP_S390_USER_STSI +-------------------------- -Architectures: s390 -Parameters: none +:Architectures: s390 +:Parameters: none This capability allows post-handlers for the STSI instruction. After initial handling in the kernel, KVM exits to user space with KVM_EXIT_S390_STSI to allow user space to insert further data. Before exiting to userspace, kvm handlers should fill in s390_stsi field of -vcpu->run: -struct { +vcpu->run:: + + struct { __u64 addr; __u8 ar; __u8 reserved; __u8 fc; __u8 sel1; __u16 sel2; -} s390_stsi; + } s390_stsi; -@addr - guest address of STSI SYSIB -@fc - function code -@sel1 - selector 1 -@sel2 - selector 2 -@ar - access register number + @addr - guest address of STSI SYSIB + @fc - function code + @sel1 - selector 1 + @sel2 - selector 2 + @ar - access register number KVM handlers should exit to userspace with rc = -EREMOTE. 7.5 KVM_CAP_SPLIT_IRQCHIP +------------------------- -Architectures: x86 -Parameters: args[0] - number of routes reserved for userspace IOAPICs -Returns: 0 on success, -1 on error +:Architectures: x86 +:Parameters: args[0] - number of routes reserved for userspace IOAPICs +:Returns: 0 on success, -1 on error Create a local apic for each processor in the kernel. This can be used instead of KVM_CREATE_IRQCHIP if the userspace VMM wishes to emulate the @@ -4975,24 +5511,26 @@ Fails if VCPU has already been created, or if the irqchip is already in the kernel (i.e. KVM_CREATE_IRQCHIP has already been called). 7.6 KVM_CAP_S390_RI +------------------- -Architectures: s390 -Parameters: none +:Architectures: s390 +:Parameters: none Allows use of runtime-instrumentation introduced with zEC12 processor. Will return -EINVAL if the machine does not support runtime-instrumentation. Will return -EBUSY if a VCPU has already been created. 7.7 KVM_CAP_X2APIC_API +---------------------- -Architectures: x86 -Parameters: args[0] - features that should be enabled -Returns: 0 on success, -EINVAL when args[0] contains invalid features +:Architectures: x86 +:Parameters: args[0] - features that should be enabled +:Returns: 0 on success, -EINVAL when args[0] contains invalid features -Valid feature flags in args[0] are +Valid feature flags in args[0] are:: -#define KVM_X2APIC_API_USE_32BIT_IDS (1ULL << 0) -#define KVM_X2APIC_API_DISABLE_BROADCAST_QUIRK (1ULL << 1) + #define KVM_X2APIC_API_USE_32BIT_IDS (1ULL << 0) + #define KVM_X2APIC_API_DISABLE_BROADCAST_QUIRK (1ULL << 1) Enabling KVM_X2APIC_API_USE_32BIT_IDS changes the behavior of KVM_SET_GSI_ROUTING, KVM_SIGNAL_MSI, KVM_SET_LAPIC, and KVM_GET_LAPIC, @@ -5006,9 +5544,10 @@ without interrupt remapping. This is undesirable in logical mode, where 0xff represents CPUs 0-7 in cluster 0. 7.8 KVM_CAP_S390_USER_INSTR0 +---------------------------- -Architectures: s390 -Parameters: none +:Architectures: s390 +:Parameters: none With this capability enabled, all illegal instructions 0x0000 (2 bytes) will be intercepted and forwarded to user space. User space can use this @@ -5020,26 +5559,29 @@ This capability can be enabled dynamically even if VCPUs were already created and are running. 7.9 KVM_CAP_S390_GS +------------------- -Architectures: s390 -Parameters: none -Returns: 0 on success; -EINVAL if the machine does not support - guarded storage; -EBUSY if a VCPU has already been created. +:Architectures: s390 +:Parameters: none +:Returns: 0 on success; -EINVAL if the machine does not support + guarded storage; -EBUSY if a VCPU has already been created. Allows use of guarded storage for the KVM guest. 7.10 KVM_CAP_S390_AIS +--------------------- -Architectures: s390 -Parameters: none +:Architectures: s390 +:Parameters: none Allow use of adapter-interruption suppression. -Returns: 0 on success; -EBUSY if a VCPU has already been created. +:Returns: 0 on success; -EBUSY if a VCPU has already been created. 7.11 KVM_CAP_PPC_SMT +-------------------- -Architectures: ppc -Parameters: vsmt_mode, flags +:Architectures: ppc +:Parameters: vsmt_mode, flags Enabling this capability on a VM provides userspace with a way to set the desired virtual SMT mode (i.e. the number of virtual CPUs per @@ -5054,9 +5596,10 @@ The KVM_CAP_PPC_SMT_POSSIBLE capability indicates which virtual SMT modes are available. 7.12 KVM_CAP_PPC_FWNMI +---------------------- -Architectures: ppc -Parameters: none +:Architectures: ppc +:Parameters: none With this capability a machine check exception in the guest address space will cause KVM to exit the guest with NMI exit reason. This @@ -5065,17 +5608,18 @@ machine check handling routine. Without this capability KVM will branch to guests' 0x200 interrupt vector. 7.13 KVM_CAP_X86_DISABLE_EXITS +------------------------------ -Architectures: x86 -Parameters: args[0] defines which exits are disabled -Returns: 0 on success, -EINVAL when args[0] contains invalid exits +:Architectures: x86 +:Parameters: args[0] defines which exits are disabled +:Returns: 0 on success, -EINVAL when args[0] contains invalid exits -Valid bits in args[0] are +Valid bits in args[0] are:: -#define KVM_X86_DISABLE_EXITS_MWAIT (1 << 0) -#define KVM_X86_DISABLE_EXITS_HLT (1 << 1) -#define KVM_X86_DISABLE_EXITS_PAUSE (1 << 2) -#define KVM_X86_DISABLE_EXITS_CSTATE (1 << 3) + #define KVM_X86_DISABLE_EXITS_MWAIT (1 << 0) + #define KVM_X86_DISABLE_EXITS_HLT (1 << 1) + #define KVM_X86_DISABLE_EXITS_PAUSE (1 << 2) + #define KVM_X86_DISABLE_EXITS_CSTATE (1 << 3) Enabling this capability on a VM provides userspace with a way to no longer intercept some instructions for improved latency in some @@ -5087,12 +5631,13 @@ all such vmexits. Do not enable KVM_FEATURE_PV_UNHALT if you disable HLT exits. 7.14 KVM_CAP_S390_HPAGE_1M +-------------------------- -Architectures: s390 -Parameters: none -Returns: 0 on success, -EINVAL if hpage module parameter was not set - or cmma is enabled, or the VM has the KVM_VM_S390_UCONTROL - flag set +:Architectures: s390 +:Parameters: none +:Returns: 0 on success, -EINVAL if hpage module parameter was not set + or cmma is enabled, or the VM has the KVM_VM_S390_UCONTROL + flag set With this capability the KVM support for memory backing with 1m pages through hugetlbfs can be enabled for a VM. After the capability is @@ -5104,20 +5649,22 @@ While it is generally possible to create a huge page backed VM without this capability, the VM will not be able to run. 7.15 KVM_CAP_MSR_PLATFORM_INFO +------------------------------ -Architectures: x86 -Parameters: args[0] whether feature should be enabled or not +:Architectures: x86 +:Parameters: args[0] whether feature should be enabled or not With this capability, a guest may read the MSR_PLATFORM_INFO MSR. Otherwise, a #GP would be raised when the guest tries to access. Currently, this capability does not enable write permissions of this MSR for the guest. 7.16 KVM_CAP_PPC_NESTED_HV +-------------------------- -Architectures: ppc -Parameters: none -Returns: 0 on success, -EINVAL when the implementation doesn't support - nested-HV virtualization. +:Architectures: ppc +:Parameters: none +:Returns: 0 on success, -EINVAL when the implementation doesn't support + nested-HV virtualization. HV-KVM on POWER9 and later systems allows for "nested-HV" virtualization, which provides a way for a guest VM to run guests that @@ -5127,9 +5674,10 @@ the necessary functionality and on the facility being enabled with a kvm-hv module parameter. 7.17 KVM_CAP_EXCEPTION_PAYLOAD +------------------------------ -Architectures: x86 -Parameters: args[0] whether feature should be enabled or not +:Architectures: x86 +:Parameters: args[0] whether feature should be enabled or not With this capability enabled, CR2 will not be modified prior to the emulated VM-exit when L1 intercepts a #PF exception that occurs in @@ -5140,21 +5688,21 @@ L2. As a result, when KVM_GET_VCPU_EVENTS reports a pending #PF (or faulting address (or the new DR6 bits*) will be reported in the exception_payload field. Similarly, when userspace injects a #PF (or #DB) into L2 using KVM_SET_VCPU_EVENTS, it is expected to set -exception.has_payload and to put the faulting address (or the new DR6 -bits*) in the exception_payload field. +exception.has_payload and to put the faulting address - or the new DR6 +bits\ [#]_ - in the exception_payload field. This capability also enables exception.pending in struct kvm_vcpu_events, which allows userspace to distinguish between pending and injected exceptions. -* For the new DR6 bits, note that bit 16 is set iff the #DB exception - will clear DR6.RTM. +.. [#] For the new DR6 bits, note that bit 16 is set iff the #DB exception + will clear DR6.RTM. 7.18 KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 -Architectures: x86, arm, arm64, mips -Parameters: args[0] whether feature should be enabled or not +:Architectures: x86, arm, arm64, mips +:Parameters: args[0] whether feature should be enabled or not With this capability enabled, KVM_GET_DIRTY_LOG will not automatically clear and write-protect all pages that are returned as dirty. @@ -5181,14 +5729,15 @@ KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 signals that those bugs are fixed. Userspace should not try to use KVM_CAP_MANUAL_DIRTY_LOG_PROTECT. 8. Other capabilities. ----------------------- +====================== This section lists capabilities that give information about other features of the KVM implementation. 8.1 KVM_CAP_PPC_HWRNG +--------------------- -Architectures: ppc +:Architectures: ppc This capability, if KVM_CHECK_EXTENSION indicates that it is available, means that that the kernel has an implementation of the @@ -5197,8 +5746,10 @@ If present, the kernel H_RANDOM handler can be enabled for guest use with the KVM_CAP_PPC_ENABLE_HCALL capability. 8.2 KVM_CAP_HYPERV_SYNIC +------------------------ + +:Architectures: x86 -Architectures: x86 This capability, if KVM_CHECK_EXTENSION indicates that it is available, means that that the kernel has an implementation of the Hyper-V Synthetic interrupt controller(SynIC). Hyper-V SynIC is @@ -5210,8 +5761,9 @@ will disable the use of APIC hardware virtualization even if supported by the CPU, as it's incompatible with SynIC auto-EOI behavior. 8.3 KVM_CAP_PPC_RADIX_MMU +------------------------- -Architectures: ppc +:Architectures: ppc This capability, if KVM_CHECK_EXTENSION indicates that it is available, means that that the kernel can support guests using the @@ -5219,8 +5771,9 @@ radix MMU defined in Power ISA V3.00 (as implemented in the POWER9 processor). 8.4 KVM_CAP_PPC_HASH_MMU_V3 +--------------------------- -Architectures: ppc +:Architectures: ppc This capability, if KVM_CHECK_EXTENSION indicates that it is available, means that that the kernel can support guests using the @@ -5228,8 +5781,9 @@ hashed page table MMU defined in Power ISA V3.00 (as implemented in the POWER9 processor), including in-memory segment tables. 8.5 KVM_CAP_MIPS_VZ +------------------- -Architectures: mips +:Architectures: mips This capability, if KVM_CHECK_EXTENSION on the main kvm handle indicates that it is available, means that full hardware assisted virtualization capabilities @@ -5247,16 +5801,19 @@ values (see below). All other values are reserved. This is to allow for the possibility of other hardware assisted virtualization implementations which may be incompatible with the MIPS VZ ASE. - 0: The trap & emulate implementation is in use to run guest code in user +== ========================================================================== + 0 The trap & emulate implementation is in use to run guest code in user mode. Guest virtual memory segments are rearranged to fit the guest in the user mode address space. - 1: The MIPS VZ ASE is in use, providing full hardware assisted + 1 The MIPS VZ ASE is in use, providing full hardware assisted virtualization, including standard guest virtual memory segments. +== ========================================================================== 8.6 KVM_CAP_MIPS_TE +------------------- -Architectures: mips +:Architectures: mips This capability, if KVM_CHECK_EXTENSION on the main kvm handle indicates that it is available, means that the trap & emulate implementation is available to @@ -5268,8 +5825,9 @@ If KVM_CHECK_EXTENSION on a kvm VM handle indicates that this capability is available, it means that the VM is using trap & emulate. 8.7 KVM_CAP_MIPS_64BIT +---------------------- -Architectures: mips +:Architectures: mips This capability indicates the supported architecture type of the guest, i.e. the supported register and address width. @@ -5279,22 +5837,26 @@ kvm VM handle correspond roughly to the CP0_Config.AT register field, and should be checked specifically against known values (see below). All other values are reserved. - 0: MIPS32 or microMIPS32. +== ======================================================================== + 0 MIPS32 or microMIPS32. Both registers and addresses are 32-bits wide. It will only be possible to run 32-bit guest code. - 1: MIPS64 or microMIPS64 with access only to 32-bit compatibility segments. + 1 MIPS64 or microMIPS64 with access only to 32-bit compatibility segments. Registers are 64-bits wide, but addresses are 32-bits wide. 64-bit guest code may run but cannot access MIPS64 memory segments. It will also be possible to run 32-bit guest code. - 2: MIPS64 or microMIPS64 with access to all address segments. + 2 MIPS64 or microMIPS64 with access to all address segments. Both registers and addresses are 64-bits wide. It will be possible to run 64-bit or 32-bit guest code. +== ======================================================================== 8.9 KVM_CAP_ARM_USER_IRQ +------------------------ + +:Architectures: arm, arm64 -Architectures: arm, arm64 This capability, if KVM_CHECK_EXTENSION indicates that it is available, means that if userspace creates a VM without an in-kernel interrupt controller, it will be notified of changes to the output level of in-kernel emulated devices, @@ -5321,7 +5883,7 @@ If KVM_CAP_ARM_USER_IRQ is supported, the KVM_CHECK_EXTENSION ioctl returns a number larger than 0 indicating the version of this capability is implemented and thereby which bits in in run->s.regs.device_irq_level can signal values. -Currently the following bits are defined for the device_irq_level bitmap: +Currently the following bits are defined for the device_irq_level bitmap:: KVM_CAP_ARM_USER_IRQ >= 1: @@ -5334,8 +5896,9 @@ indicated by returning a higher number from KVM_CHECK_EXTENSION and will be listed above. 8.10 KVM_CAP_PPC_SMT_POSSIBLE +----------------------------- -Architectures: ppc +:Architectures: ppc Querying this capability returns a bitmap indicating the possible virtual SMT modes that can be set using KVM_CAP_PPC_SMT. If bit N @@ -5343,8 +5906,9 @@ virtual SMT modes that can be set using KVM_CAP_PPC_SMT. If bit N available. 8.11 KVM_CAP_HYPERV_SYNIC2 +-------------------------- -Architectures: x86 +:Architectures: x86 This capability enables a newer version of Hyper-V Synthetic interrupt controller (SynIC). The only difference with KVM_CAP_HYPERV_SYNIC is that KVM @@ -5352,8 +5916,9 @@ doesn't clear SynIC message and event flags pages when they are enabled by writing to the respective MSRs. 8.12 KVM_CAP_HYPERV_VP_INDEX +---------------------------- -Architectures: x86 +:Architectures: x86 This capability indicates that userspace can load HV_X64_MSR_VP_INDEX msr. Its value is used to denote the target vcpu for a SynIC interrupt. For @@ -5361,47 +5926,53 @@ compatibilty, KVM initializes this msr to KVM's internal vcpu index. When this capability is absent, userspace can still query this msr's value. 8.13 KVM_CAP_S390_AIS_MIGRATION +------------------------------- -Architectures: s390 -Parameters: none +:Architectures: s390 +:Parameters: none This capability indicates if the flic device will be able to get/set the AIS states for migration via the KVM_DEV_FLIC_AISM_ALL attribute and allows to discover this without having to create a flic device. 8.14 KVM_CAP_S390_PSW +--------------------- -Architectures: s390 +:Architectures: s390 This capability indicates that the PSW is exposed via the kvm_run structure. 8.15 KVM_CAP_S390_GMAP +---------------------- -Architectures: s390 +:Architectures: s390 This capability indicates that the user space memory used as guest mapping can be anywhere in the user memory address space, as long as the memory slots are aligned and sized to a segment (1MB) boundary. 8.16 KVM_CAP_S390_COW +--------------------- -Architectures: s390 +:Architectures: s390 This capability indicates that the user space memory used as guest mapping can use copy-on-write semantics as well as dirty pages tracking via read-only page tables. 8.17 KVM_CAP_S390_BPB +--------------------- -Architectures: s390 +:Architectures: s390 This capability indicates that kvm will implement the interfaces to handle reset, migration and nested KVM for branch prediction blocking. The stfle facility 82 should not be provided to the guest without this capability. 8.18 KVM_CAP_HYPERV_TLBFLUSH +---------------------------- -Architectures: x86 +:Architectures: x86 This capability indicates that KVM supports paravirtualized Hyper-V TLB Flush hypercalls: @@ -5409,8 +5980,9 @@ HvFlushVirtualAddressSpace, HvFlushVirtualAddressSpaceEx, HvFlushVirtualAddressList, HvFlushVirtualAddressListEx. 8.19 KVM_CAP_ARM_INJECT_SERROR_ESR +---------------------------------- -Architectures: arm, arm64 +:Architectures: arm, arm64 This capability indicates that userspace can specify (via the KVM_SET_VCPU_EVENTS ioctl) the syndrome value reported to the guest when it @@ -5421,16 +5993,20 @@ CPU when the exception is taken. If this virtual SError is taken to EL1 using AArch64, this value will be reported in the ISS field of ESR_ELx. See KVM_CAP_VCPU_EVENTS for more details. + 8.20 KVM_CAP_HYPERV_SEND_IPI +---------------------------- -Architectures: x86 +:Architectures: x86 This capability indicates that KVM supports paravirtualized Hyper-V IPI send hypercalls: HvCallSendSyntheticClusterIpi, HvCallSendSyntheticClusterIpiEx. + 8.21 KVM_CAP_HYPERV_DIRECT_TLBFLUSH +----------------------------------- -Architecture: x86 +:Architecture: x86 This capability indicates that KVM running on top of Hyper-V hypervisor enables Direct TLB flush for its guests meaning that TLB flush diff --git a/Documentation/virt/kvm/arm/hyp-abi.txt b/Documentation/virt/kvm/arm/hyp-abi.rst index a20a0bee268d..d1fc27d848e9 100644 --- a/Documentation/virt/kvm/arm/hyp-abi.txt +++ b/Documentation/virt/kvm/arm/hyp-abi.rst @@ -1,4 +1,8 @@ -* Internal ABI between the kernel and HYP +.. SPDX-License-Identifier: GPL-2.0 + +======================================= +Internal ABI between the kernel and HYP +======================================= This file documents the interaction between the Linux kernel and the hypervisor layer when running Linux as a hypervisor (for example @@ -19,25 +23,31 @@ and only act on individual CPUs. Unless specified otherwise, any built-in hypervisor must implement these functions (see arch/arm{,64}/include/asm/virt.h): -* r0/x0 = HVC_SET_VECTORS - r1/x1 = vectors +* :: + + r0/x0 = HVC_SET_VECTORS + r1/x1 = vectors Set HVBAR/VBAR_EL2 to 'vectors' to enable a hypervisor. 'vectors' must be a physical address, and respect the alignment requirements of the architecture. Only implemented by the initial stubs, not by Linux hypervisors. -* r0/x0 = HVC_RESET_VECTORS +* :: + + r0/x0 = HVC_RESET_VECTORS Turn HYP/EL2 MMU off, and reset HVBAR/VBAR_EL2 to the initials stubs' exception vector value. This effectively disables an existing hypervisor. -* r0/x0 = HVC_SOFT_RESTART - r1/x1 = restart address - x2 = x0's value when entering the next payload (arm64) - x3 = x1's value when entering the next payload (arm64) - x4 = x2's value when entering the next payload (arm64) +* :: + + r0/x0 = HVC_SOFT_RESTART + r1/x1 = restart address + x2 = x0's value when entering the next payload (arm64) + x3 = x1's value when entering the next payload (arm64) + x4 = x2's value when entering the next payload (arm64) Mask all exceptions, disable the MMU, move the arguments into place (arm64 only), and jump to the restart address while at HYP/EL2. This diff --git a/Documentation/virt/kvm/arm/index.rst b/Documentation/virt/kvm/arm/index.rst new file mode 100644 index 000000000000..3e2b2aba90fc --- /dev/null +++ b/Documentation/virt/kvm/arm/index.rst @@ -0,0 +1,12 @@ +.. SPDX-License-Identifier: GPL-2.0 + +=== +ARM +=== + +.. toctree:: + :maxdepth: 2 + + hyp-abi + psci + pvtime diff --git a/Documentation/virt/kvm/arm/psci.txt b/Documentation/virt/kvm/arm/psci.rst index 559586fc9d37..d52c2e83b5b8 100644 --- a/Documentation/virt/kvm/arm/psci.txt +++ b/Documentation/virt/kvm/arm/psci.rst @@ -1,3 +1,9 @@ +.. SPDX-License-Identifier: GPL-2.0 + +========================================= +Power State Coordination Interface (PSCI) +========================================= + KVM implements the PSCI (Power State Coordination Interface) specification in order to provide services such as CPU on/off, reset and power-off to the guest. @@ -30,32 +36,42 @@ The following register is defined: - Affects the whole VM (even if the register view is per-vcpu) * KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1: - Holds the state of the firmware support to mitigate CVE-2017-5715, as - offered by KVM to the guest via a HVC call. The workaround is described - under SMCCC_ARCH_WORKAROUND_1 in [1]. + Holds the state of the firmware support to mitigate CVE-2017-5715, as + offered by KVM to the guest via a HVC call. The workaround is described + under SMCCC_ARCH_WORKAROUND_1 in [1]. + Accepted values are: - KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1_NOT_AVAIL: KVM does not offer + + KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1_NOT_AVAIL: + KVM does not offer firmware support for the workaround. The mitigation status for the guest is unknown. - KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1_AVAIL: The workaround HVC call is + KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1_AVAIL: + The workaround HVC call is available to the guest and required for the mitigation. - KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1_NOT_REQUIRED: The workaround HVC call + KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_1_NOT_REQUIRED: + The workaround HVC call is available to the guest, but it is not needed on this VCPU. * KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2: - Holds the state of the firmware support to mitigate CVE-2018-3639, as - offered by KVM to the guest via a HVC call. The workaround is described - under SMCCC_ARCH_WORKAROUND_2 in [1]. + Holds the state of the firmware support to mitigate CVE-2018-3639, as + offered by KVM to the guest via a HVC call. The workaround is described + under SMCCC_ARCH_WORKAROUND_2 in [1]_. + Accepted values are: - KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_NOT_AVAIL: A workaround is not + + KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_NOT_AVAIL: + A workaround is not available. KVM does not offer firmware support for the workaround. - KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_UNKNOWN: The workaround state is + KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_UNKNOWN: + The workaround state is unknown. KVM does not offer firmware support for the workaround. - KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_AVAIL: The workaround is available, + KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_AVAIL: + The workaround is available, and can be disabled by a vCPU. If KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_ENABLED is set, it is active for this vCPU. - KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_NOT_REQUIRED: The workaround is - always active on this vCPU or it is not needed. + KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_2_NOT_REQUIRED: + The workaround is always active on this vCPU or it is not needed. -[1] https://developer.arm.com/-/media/developer/pdf/ARM_DEN_0070A_Firmware_interfaces_for_mitigating_CVE-2017-5715.pdf +.. [1] https://developer.arm.com/-/media/developer/pdf/ARM_DEN_0070A_Firmware_interfaces_for_mitigating_CVE-2017-5715.pdf diff --git a/Documentation/virt/kvm/devices/arm-vgic-its.txt b/Documentation/virt/kvm/devices/arm-vgic-its.rst index eeaa95b893a8..6c304fd2b1b4 100644 --- a/Documentation/virt/kvm/devices/arm-vgic-its.txt +++ b/Documentation/virt/kvm/devices/arm-vgic-its.rst @@ -1,3 +1,6 @@ +.. SPDX-License-Identifier: GPL-2.0 + +=============================================== ARM Virtual Interrupt Translation Service (ITS) =============================================== @@ -12,22 +15,32 @@ There can be multiple ITS controllers per guest, each of them has to have a separate, non-overlapping MMIO region. -Groups: - KVM_DEV_ARM_VGIC_GRP_ADDR +Groups +====== + +KVM_DEV_ARM_VGIC_GRP_ADDR +------------------------- + Attributes: KVM_VGIC_ITS_ADDR_TYPE (rw, 64-bit) Base address in the guest physical address space of the GICv3 ITS control register frame. This address needs to be 64K aligned and the region covers 128K. + Errors: - -E2BIG: Address outside of addressable IPA range - -EINVAL: Incorrectly aligned address - -EEXIST: Address already configured - -EFAULT: Invalid user pointer for attr->addr. - -ENODEV: Incorrect attribute or the ITS is not supported. + ======= ================================================= + -E2BIG Address outside of addressable IPA range + -EINVAL Incorrectly aligned address + -EEXIST Address already configured + -EFAULT Invalid user pointer for attr->addr. + -ENODEV Incorrect attribute or the ITS is not supported. + ======= ================================================= + + +KVM_DEV_ARM_VGIC_GRP_CTRL +------------------------- - KVM_DEV_ARM_VGIC_GRP_CTRL Attributes: KVM_DEV_ARM_VGIC_CTRL_INIT request the initialization of the ITS, no additional parameter in @@ -58,16 +71,21 @@ Groups: "ITS Restore Sequence". Errors: - -ENXIO: ITS not properly configured as required prior to setting + + ======= ========================================================== + -ENXIO ITS not properly configured as required prior to setting this attribute - -ENOMEM: Memory shortage when allocating ITS internal data - -EINVAL: Inconsistent restored data - -EFAULT: Invalid guest ram access - -EBUSY: One or more VCPUS are running - -EACCES: The virtual ITS is backed by a physical GICv4 ITS, and the + -ENOMEM Memory shortage when allocating ITS internal data + -EINVAL Inconsistent restored data + -EFAULT Invalid guest ram access + -EBUSY One or more VCPUS are running + -EACCES The virtual ITS is backed by a physical GICv4 ITS, and the state is not available + ======= ========================================================== + +KVM_DEV_ARM_VGIC_GRP_ITS_REGS +----------------------------- - KVM_DEV_ARM_VGIC_GRP_ITS_REGS Attributes: The attr field of kvm_device_attr encodes the offset of the ITS register, relative to the ITS control frame base address @@ -78,6 +96,7 @@ Groups: be accessed with full length. Writes to read-only registers are ignored by the kernel except for: + - GITS_CREADR. It must be restored otherwise commands in the queue will be re-executed after restoring CWRITER. GITS_CREADR must be restored before restoring the GITS_CTLR which is likely to enable the @@ -91,30 +110,36 @@ Groups: For other registers, getting or setting a register has the same effect as reading/writing the register on real hardware. + Errors: - -ENXIO: Offset does not correspond to any supported register - -EFAULT: Invalid user pointer for attr->addr - -EINVAL: Offset is not 64-bit aligned - -EBUSY: one or more VCPUS are running - ITS Restore Sequence: - ------------------------- + ======= ==================================================== + -ENXIO Offset does not correspond to any supported register + -EFAULT Invalid user pointer for attr->addr + -EINVAL Offset is not 64-bit aligned + -EBUSY one or more VCPUS are running + ======= ==================================================== + +ITS Restore Sequence: +--------------------- The following ordering must be followed when restoring the GIC and the ITS: + a) restore all guest memory and create vcpus b) restore all redistributors c) provide the ITS base address (KVM_DEV_ARM_VGIC_GRP_ADDR) d) restore the ITS in the following order: - 1. Restore GITS_CBASER - 2. Restore all other GITS_ registers, except GITS_CTLR! - 3. Load the ITS table data (KVM_DEV_ARM_ITS_RESTORE_TABLES) - 4. Restore GITS_CTLR + + 1. Restore GITS_CBASER + 2. Restore all other ``GITS_`` registers, except GITS_CTLR! + 3. Load the ITS table data (KVM_DEV_ARM_ITS_RESTORE_TABLES) + 4. Restore GITS_CTLR Then vcpus can be started. - ITS Table ABI REV0: - ------------------- +ITS Table ABI REV0: +------------------- Revision 0 of the ABI only supports the features of a virtual GICv3, and does not support a virtual GICv4 with support for direct injection of virtual @@ -125,12 +150,13 @@ Then vcpus can be started. entries in the collection are listed in no particular order. All entries are 8 bytes. - Device Table Entry (DTE): + Device Table Entry (DTE):: - bits: | 63| 62 ... 49 | 48 ... 5 | 4 ... 0 | - values: | V | next | ITT_addr | Size | + bits: | 63| 62 ... 49 | 48 ... 5 | 4 ... 0 | + values: | V | next | ITT_addr | Size | + + where: - where; - V indicates whether the entry is valid. If not, other fields are not meaningful. - next: equals to 0 if this entry is the last one; otherwise it @@ -140,32 +166,34 @@ Then vcpus can be started. - Size specifies the supported number of bits for the EventID, minus one - Collection Table Entry (CTE): + Collection Table Entry (CTE):: - bits: | 63| 62 .. 52 | 51 ... 16 | 15 ... 0 | - values: | V | RES0 | RDBase | ICID | + bits: | 63| 62 .. 52 | 51 ... 16 | 15 ... 0 | + values: | V | RES0 | RDBase | ICID | where: + - V indicates whether the entry is valid. If not, other fields are not meaningful. - RES0: reserved field with Should-Be-Zero-or-Preserved behavior. - RDBase is the PE number (GICR_TYPER.Processor_Number semantic), - ICID is the collection ID - Interrupt Translation Entry (ITE): + Interrupt Translation Entry (ITE):: - bits: | 63 ... 48 | 47 ... 16 | 15 ... 0 | - values: | next | pINTID | ICID | + bits: | 63 ... 48 | 47 ... 16 | 15 ... 0 | + values: | next | pINTID | ICID | where: + - next: equals to 0 if this entry is the last one; otherwise it corresponds to the EventID offset to the next ITE capped by 2^16 -1. - pINTID is the physical LPI ID; if zero, it means the entry is not valid and other fields are not meaningful. - ICID is the collection ID - ITS Reset State: - ---------------- +ITS Reset State: +---------------- RESET returns the ITS to the same state that it was when first created and initialized. When the RESET command returns, the following things are diff --git a/Documentation/virt/kvm/devices/arm-vgic-v3.txt b/Documentation/virt/kvm/devices/arm-vgic-v3.rst index ff290b43c8e5..5dd3bff51978 100644 --- a/Documentation/virt/kvm/devices/arm-vgic-v3.txt +++ b/Documentation/virt/kvm/devices/arm-vgic-v3.rst @@ -1,9 +1,12 @@ +.. SPDX-License-Identifier: GPL-2.0 + +============================================================== ARM Virtual Generic Interrupt Controller v3 and later (VGICv3) ============================================================== Device types supported: - KVM_DEV_TYPE_ARM_VGIC_V3 ARM Generic Interrupt Controller v3.0 + - KVM_DEV_TYPE_ARM_VGIC_V3 ARM Generic Interrupt Controller v3.0 Only one VGIC instance may be instantiated through this API. The created VGIC will act as the VM interrupt controller, requiring emulated user-space devices @@ -15,7 +18,8 @@ Creating a guest GICv3 device requires a host GICv3 as well. Groups: KVM_DEV_ARM_VGIC_GRP_ADDR - Attributes: + Attributes: + KVM_VGIC_V3_ADDR_TYPE_DIST (rw, 64-bit) Base address in the guest physical address space of the GICv3 distributor register mappings. Only valid for KVM_DEV_TYPE_ARM_VGIC_V3. @@ -29,21 +33,25 @@ Groups: This address needs to be 64K aligned. KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION (rw, 64-bit) - The attribute data pointed to by kvm_device_attr.addr is a __u64 value: - bits: | 63 .... 52 | 51 .... 16 | 15 - 12 |11 - 0 - values: | count | base | flags | index + The attribute data pointed to by kvm_device_attr.addr is a __u64 value:: + + bits: | 63 .... 52 | 51 .... 16 | 15 - 12 |11 - 0 + values: | count | base | flags | index + - index encodes the unique redistributor region index - flags: reserved for future use, currently 0 - base field encodes bits [51:16] of the guest physical base address of the first redistributor in the region. - count encodes the number of redistributors in the region. Must be greater than 0. + There are two 64K pages for each redistributor in the region and redistributors are laid out contiguously within the region. Regions are filled with redistributors in the index order. The sum of all region count fields must be greater than or equal to the number of VCPUs. Redistributor regions must be registered in the incremental index order, starting from index 0. + The characteristics of a specific redistributor region can be read by presetting the index field in the attr data. Only valid for KVM_DEV_TYPE_ARM_VGIC_V3. @@ -52,23 +60,27 @@ Groups: KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION attributes. Errors: - -E2BIG: Address outside of addressable IPA range - -EINVAL: Incorrectly aligned address, bad redistributor region + + ======= ============================================================= + -E2BIG Address outside of addressable IPA range + -EINVAL Incorrectly aligned address, bad redistributor region count/index, mixed redistributor region attribute usage - -EEXIST: Address already configured - -ENOENT: Attempt to read the characteristics of a non existing + -EEXIST Address already configured + -ENOENT Attempt to read the characteristics of a non existing redistributor region - -ENXIO: The group or attribute is unknown/unsupported for this device + -ENXIO The group or attribute is unknown/unsupported for this device or hardware support is missing. - -EFAULT: Invalid user pointer for attr->addr. + -EFAULT Invalid user pointer for attr->addr. + ======= ============================================================= + + KVM_DEV_ARM_VGIC_GRP_DIST_REGS, KVM_DEV_ARM_VGIC_GRP_REDIST_REGS + Attributes: - KVM_DEV_ARM_VGIC_GRP_DIST_REGS - KVM_DEV_ARM_VGIC_GRP_REDIST_REGS - Attributes: - The attr field of kvm_device_attr encodes two values: - bits: | 63 .... 32 | 31 .... 0 | - values: | mpidr | offset | + The attr field of kvm_device_attr encodes two values:: + + bits: | 63 .... 32 | 31 .... 0 | + values: | mpidr | offset | All distributor regs are (rw, 32-bit) and kvm_device_attr.addr points to a __u32 value. 64-bit registers must be accessed by separately accessing the @@ -93,7 +105,8 @@ Groups: redistributor is accessed. The mpidr is ignored for the distributor. The mpidr encoding is based on the affinity information in the - architecture defined MPIDR, and the field is encoded as follows: + architecture defined MPIDR, and the field is encoded as follows:: + | 63 .... 56 | 55 .... 48 | 47 .... 40 | 39 .... 32 | | Aff3 | Aff2 | Aff1 | Aff0 | @@ -148,24 +161,30 @@ Groups: ignored. Errors: - -ENXIO: Getting or setting this register is not yet supported - -EBUSY: One or more VCPUs are running + + ====== ===================================================== + -ENXIO Getting or setting this register is not yet supported + -EBUSY One or more VCPUs are running + ====== ===================================================== KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS - Attributes: - The attr field of kvm_device_attr encodes two values: - bits: | 63 .... 32 | 31 .... 16 | 15 .... 0 | - values: | mpidr | RES | instr | + Attributes: + + The attr field of kvm_device_attr encodes two values:: + + bits: | 63 .... 32 | 31 .... 16 | 15 .... 0 | + values: | mpidr | RES | instr | The mpidr field encodes the CPU ID based on the affinity information in the - architecture defined MPIDR, and the field is encoded as follows: + architecture defined MPIDR, and the field is encoded as follows:: + | 63 .... 56 | 55 .... 48 | 47 .... 40 | 39 .... 32 | | Aff3 | Aff2 | Aff1 | Aff0 | The instr field encodes the system register to access based on the fields defined in the A64 instruction set encoding for system register access - (RES means the bits are reserved for future use and should be zero): + (RES means the bits are reserved for future use and should be zero):: | 15 ... 14 | 13 ... 11 | 10 ... 7 | 6 ... 3 | 2 ... 0 | | Op 0 | Op1 | CRn | CRm | Op2 | @@ -178,26 +197,35 @@ Groups: CPU interface registers access is not implemented for AArch32 mode. Error -ENXIO is returned when accessed in AArch32 mode. + Errors: - -ENXIO: Getting or setting this register is not yet supported - -EBUSY: VCPU is running - -EINVAL: Invalid mpidr or register value supplied + + ======= ===================================================== + -ENXIO Getting or setting this register is not yet supported + -EBUSY VCPU is running + -EINVAL Invalid mpidr or register value supplied + ======= ===================================================== KVM_DEV_ARM_VGIC_GRP_NR_IRQS - Attributes: + Attributes: + A value describing the number of interrupts (SGI, PPI and SPI) for this GIC instance, ranging from 64 to 1024, in increments of 32. kvm_device_attr.addr points to a __u32 value. Errors: - -EINVAL: Value set is out of the expected range - -EBUSY: Value has already be set. + + ======= ====================================== + -EINVAL Value set is out of the expected range + -EBUSY Value has already be set. + ======= ====================================== KVM_DEV_ARM_VGIC_GRP_CTRL - Attributes: + Attributes: + KVM_DEV_ARM_VGIC_CTRL_INIT request the initialization of the VGIC, no additional parameter in kvm_device_attr.addr. @@ -205,20 +233,26 @@ Groups: save all LPI pending bits into guest RAM pending tables. The first kB of the pending table is not altered by this operation. + Errors: - -ENXIO: VGIC not properly configured as required prior to calling - this attribute - -ENODEV: no online VCPU - -ENOMEM: memory shortage when allocating vgic internal data - -EFAULT: Invalid guest ram access - -EBUSY: One or more VCPUS are running + + ======= ======================================================== + -ENXIO VGIC not properly configured as required prior to calling + this attribute + -ENODEV no online VCPU + -ENOMEM memory shortage when allocating vgic internal data + -EFAULT Invalid guest ram access + -EBUSY One or more VCPUS are running + ======= ======================================================== KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO - Attributes: - The attr field of kvm_device_attr encodes the following values: - bits: | 63 .... 32 | 31 .... 10 | 9 .... 0 | - values: | mpidr | info | vINTID | + Attributes: + + The attr field of kvm_device_attr encodes the following values:: + + bits: | 63 .... 32 | 31 .... 10 | 9 .... 0 | + values: | mpidr | info | vINTID | The vINTID specifies which set of IRQs is reported on. @@ -228,6 +262,7 @@ Groups: VGIC_LEVEL_INFO_LINE_LEVEL: Get/Set the input level of the IRQ line for a set of 32 contiguously numbered interrupts. + vINTID must be a multiple of 32. kvm_device_attr.addr points to a __u32 value which will contain a @@ -243,9 +278,14 @@ Groups: reported with the same value regardless of the mpidr specified. The mpidr field encodes the CPU ID based on the affinity information in the - architecture defined MPIDR, and the field is encoded as follows: + architecture defined MPIDR, and the field is encoded as follows:: + | 63 .... 56 | 55 .... 48 | 47 .... 40 | 39 .... 32 | | Aff3 | Aff2 | Aff1 | Aff0 | + Errors: - -EINVAL: vINTID is not multiple of 32 or - info field is not VGIC_LEVEL_INFO_LINE_LEVEL + + ======= ============================================= + -EINVAL vINTID is not multiple of 32 or info field is + not VGIC_LEVEL_INFO_LINE_LEVEL + ======= ============================================= diff --git a/Documentation/virt/kvm/devices/arm-vgic.txt b/Documentation/virt/kvm/devices/arm-vgic.rst index 97b6518148f8..40bdeea1d86e 100644 --- a/Documentation/virt/kvm/devices/arm-vgic.txt +++ b/Documentation/virt/kvm/devices/arm-vgic.rst @@ -1,8 +1,12 @@ +.. SPDX-License-Identifier: GPL-2.0 + +================================================== ARM Virtual Generic Interrupt Controller v2 (VGIC) ================================================== Device types supported: - KVM_DEV_TYPE_ARM_VGIC_V2 ARM Generic Interrupt Controller v2.0 + + - KVM_DEV_TYPE_ARM_VGIC_V2 ARM Generic Interrupt Controller v2.0 Only one VGIC instance may be instantiated through either this API or the legacy KVM_CREATE_IRQCHIP API. The created VGIC will act as the VM interrupt @@ -17,7 +21,8 @@ create both a GICv3 and GICv2 device on the same VM. Groups: KVM_DEV_ARM_VGIC_GRP_ADDR - Attributes: + Attributes: + KVM_VGIC_V2_ADDR_TYPE_DIST (rw, 64-bit) Base address in the guest physical address space of the GIC distributor register mappings. Only valid for KVM_DEV_TYPE_ARM_VGIC_V2. @@ -27,19 +32,25 @@ Groups: Base address in the guest physical address space of the GIC virtual cpu interface register mappings. Only valid for KVM_DEV_TYPE_ARM_VGIC_V2. This address needs to be 4K aligned and the region covers 4 KByte. + Errors: - -E2BIG: Address outside of addressable IPA range - -EINVAL: Incorrectly aligned address - -EEXIST: Address already configured - -ENXIO: The group or attribute is unknown/unsupported for this device + + ======= ============================================================= + -E2BIG Address outside of addressable IPA range + -EINVAL Incorrectly aligned address + -EEXIST Address already configured + -ENXIO The group or attribute is unknown/unsupported for this device or hardware support is missing. - -EFAULT: Invalid user pointer for attr->addr. + -EFAULT Invalid user pointer for attr->addr. + ======= ============================================================= KVM_DEV_ARM_VGIC_GRP_DIST_REGS - Attributes: - The attr field of kvm_device_attr encodes two values: - bits: | 63 .... 40 | 39 .. 32 | 31 .... 0 | - values: | reserved | vcpu_index | offset | + Attributes: + + The attr field of kvm_device_attr encodes two values:: + + bits: | 63 .... 40 | 39 .. 32 | 31 .... 0 | + values: | reserved | vcpu_index | offset | All distributor regs are (rw, 32-bit) @@ -58,16 +69,22 @@ Groups: KVM_DEV_ARM_VGIC_GRP_DIST_REGS and KVM_DEV_ARM_VGIC_GRP_CPU_REGS) to ensure the expected behavior. Unless GICD_IIDR has been set from userspace, writes to the interrupt group registers (GICD_IGROUPR) are ignored. + Errors: - -ENXIO: Getting or setting this register is not yet supported - -EBUSY: One or more VCPUs are running - -EINVAL: Invalid vcpu_index supplied + + ======= ===================================================== + -ENXIO Getting or setting this register is not yet supported + -EBUSY One or more VCPUs are running + -EINVAL Invalid vcpu_index supplied + ======= ===================================================== KVM_DEV_ARM_VGIC_GRP_CPU_REGS - Attributes: - The attr field of kvm_device_attr encodes two values: - bits: | 63 .... 40 | 39 .. 32 | 31 .... 0 | - values: | reserved | vcpu_index | offset | + Attributes: + + The attr field of kvm_device_attr encodes two values:: + + bits: | 63 .... 40 | 39 .. 32 | 31 .... 0 | + values: | reserved | vcpu_index | offset | All CPU interface regs are (rw, 32-bit) @@ -101,27 +118,39 @@ Groups: value left by 3 places to obtain the actual priority mask level. Errors: - -ENXIO: Getting or setting this register is not yet supported - -EBUSY: One or more VCPUs are running - -EINVAL: Invalid vcpu_index supplied + + ======= ===================================================== + -ENXIO Getting or setting this register is not yet supported + -EBUSY One or more VCPUs are running + -EINVAL Invalid vcpu_index supplied + ======= ===================================================== KVM_DEV_ARM_VGIC_GRP_NR_IRQS - Attributes: + Attributes: + A value describing the number of interrupts (SGI, PPI and SPI) for this GIC instance, ranging from 64 to 1024, in increments of 32. Errors: - -EINVAL: Value set is out of the expected range - -EBUSY: Value has already be set, or GIC has already been initialized - with default values. + + ======= ============================================================= + -EINVAL Value set is out of the expected range + -EBUSY Value has already be set, or GIC has already been initialized + with default values. + ======= ============================================================= KVM_DEV_ARM_VGIC_GRP_CTRL - Attributes: + Attributes: + KVM_DEV_ARM_VGIC_CTRL_INIT request the initialization of the VGIC or ITS, no additional parameter in kvm_device_attr.addr. + Errors: - -ENXIO: VGIC not properly configured as required prior to calling - this attribute - -ENODEV: no online VCPU - -ENOMEM: memory shortage when allocating vgic internal data + + ======= ========================================================= + -ENXIO VGIC not properly configured as required prior to calling + this attribute + -ENODEV no online VCPU + -ENOMEM memory shortage when allocating vgic internal data + ======= ========================================================= diff --git a/Documentation/virt/kvm/devices/index.rst b/Documentation/virt/kvm/devices/index.rst new file mode 100644 index 000000000000..192cda7405c8 --- /dev/null +++ b/Documentation/virt/kvm/devices/index.rst @@ -0,0 +1,19 @@ +.. SPDX-License-Identifier: GPL-2.0 + +======= +Devices +======= + +.. toctree:: + :maxdepth: 2 + + arm-vgic-its + arm-vgic + arm-vgic-v3 + mpic + s390_flic + vcpu + vfio + vm + xics + xive diff --git a/Documentation/virt/kvm/devices/mpic.txt b/Documentation/virt/kvm/devices/mpic.rst index 8257397adc3c..55cefe030d41 100644 --- a/Documentation/virt/kvm/devices/mpic.txt +++ b/Documentation/virt/kvm/devices/mpic.rst @@ -1,9 +1,13 @@ +.. SPDX-License-Identifier: GPL-2.0 + +========================= MPIC interrupt controller ========================= Device types supported: - KVM_DEV_TYPE_FSL_MPIC_20 Freescale MPIC v2.0 - KVM_DEV_TYPE_FSL_MPIC_42 Freescale MPIC v4.2 + + - KVM_DEV_TYPE_FSL_MPIC_20 Freescale MPIC v2.0 + - KVM_DEV_TYPE_FSL_MPIC_42 Freescale MPIC v4.2 Only one MPIC instance, of any type, may be instantiated. The created MPIC will act as the system interrupt controller, connecting to each @@ -11,7 +15,8 @@ vcpu's interrupt inputs. Groups: KVM_DEV_MPIC_GRP_MISC - Attributes: + Attributes: + KVM_DEV_MPIC_BASE_ADDR (rw, 64-bit) Base address of the 256 KiB MPIC register space. Must be naturally aligned. A value of zero disables the mapping. diff --git a/Documentation/virt/kvm/devices/s390_flic.txt b/Documentation/virt/kvm/devices/s390_flic.rst index a4e20a090174..954190da7d04 100644 --- a/Documentation/virt/kvm/devices/s390_flic.txt +++ b/Documentation/virt/kvm/devices/s390_flic.rst @@ -1,3 +1,6 @@ +.. SPDX-License-Identifier: GPL-2.0 + +==================================== FLIC (floating interrupt controller) ==================================== @@ -31,8 +34,10 @@ Groups: Copies all floating interrupts into a buffer provided by userspace. When the buffer is too small it returns -ENOMEM, which is the indication for userspace to try again with a bigger buffer. + -ENOBUFS is returned when the allocation of a kernelspace buffer has failed. + -EFAULT is returned when copying data to userspace failed. All interrupts remain pending, i.e. are not deleted from the list of currently pending interrupts. @@ -60,38 +65,41 @@ Groups: KVM_DEV_FLIC_ADAPTER_REGISTER Register an I/O adapter interrupt source. Takes a kvm_s390_io_adapter - describing the adapter to register: + describing the adapter to register:: -struct kvm_s390_io_adapter { - __u32 id; - __u8 isc; - __u8 maskable; - __u8 swap; - __u8 flags; -}; + struct kvm_s390_io_adapter { + __u32 id; + __u8 isc; + __u8 maskable; + __u8 swap; + __u8 flags; + }; id contains the unique id for the adapter, isc the I/O interruption subclass to use, maskable whether this adapter may be masked (interrupts turned off), swap whether the indicators need to be byte swapped, and flags contains further characteristics of the adapter. + Currently defined values for 'flags' are: + - KVM_S390_ADAPTER_SUPPRESSIBLE: adapter is subject to AIS (adapter-interrupt-suppression) facility. This flag only has an effect if the AIS capability is enabled. + Unknown flag values are ignored. KVM_DEV_FLIC_ADAPTER_MODIFY Modifies attributes of an existing I/O adapter interrupt source. Takes - a kvm_s390_io_adapter_req specifying the adapter and the operation: + a kvm_s390_io_adapter_req specifying the adapter and the operation:: -struct kvm_s390_io_adapter_req { - __u32 id; - __u8 type; - __u8 mask; - __u16 pad0; - __u64 addr; -}; + struct kvm_s390_io_adapter_req { + __u32 id; + __u8 type; + __u8 mask; + __u16 pad0; + __u64 addr; + }; id specifies the adapter and type the operation. The supported operations are: @@ -103,8 +111,9 @@ struct kvm_s390_io_adapter_req { perform a gmap translation for the guest address provided in addr, pin a userspace page for the translated address and add it to the list of mappings - Note: A new mapping will be created unconditionally; therefore, - the calling code should avoid making duplicate mappings. + + .. note:: A new mapping will be created unconditionally; therefore, + the calling code should avoid making duplicate mappings. KVM_S390_IO_ADAPTER_UNMAP release a userspace page for the translated address specified in addr @@ -112,16 +121,17 @@ struct kvm_s390_io_adapter_req { KVM_DEV_FLIC_AISM modify the adapter-interruption-suppression mode for a given isc if the - AIS capability is enabled. Takes a kvm_s390_ais_req describing: + AIS capability is enabled. Takes a kvm_s390_ais_req describing:: -struct kvm_s390_ais_req { - __u8 isc; - __u16 mode; -}; + struct kvm_s390_ais_req { + __u8 isc; + __u16 mode; + }; isc contains the target I/O interruption subclass, mode the target adapter-interruption-suppression mode. The following modes are currently supported: + - KVM_S390_AIS_MODE_ALL: ALL-Interruptions Mode, i.e. airq injection is always allowed; - KVM_S390_AIS_MODE_SINGLE: SINGLE-Interruption Mode, i.e. airq @@ -139,12 +149,12 @@ struct kvm_s390_ais_req { KVM_DEV_FLIC_AISM_ALL Gets or sets the adapter-interruption-suppression mode for all ISCs. Takes - a kvm_s390_ais_all describing: + a kvm_s390_ais_all describing:: -struct kvm_s390_ais_all { - __u8 simm; /* Single-Interruption-Mode mask */ - __u8 nimm; /* No-Interruption-Mode mask * -}; + struct kvm_s390_ais_all { + __u8 simm; /* Single-Interruption-Mode mask */ + __u8 nimm; /* No-Interruption-Mode mask * + }; simm contains Single-Interruption-Mode mask for all ISCs, nimm contains No-Interruption-Mode mask for all ISCs. Each bit in simm and nimm corresponds @@ -159,5 +169,5 @@ ENXIO, as specified in the API documentation). It is not possible to conclude that a FLIC operation is unavailable based on the error code resulting from a usage attempt. -Note: The KVM_DEV_FLIC_CLEAR_IO_IRQ ioctl will return EINVAL in case a zero -schid is specified. +.. note:: The KVM_DEV_FLIC_CLEAR_IO_IRQ ioctl will return EINVAL in case a + zero schid is specified. diff --git a/Documentation/virt/kvm/devices/vcpu.rst b/Documentation/virt/kvm/devices/vcpu.rst new file mode 100644 index 000000000000..9963e680770a --- /dev/null +++ b/Documentation/virt/kvm/devices/vcpu.rst @@ -0,0 +1,114 @@ +.. SPDX-License-Identifier: GPL-2.0 + +====================== +Generic vcpu interface +====================== + +The virtual cpu "device" also accepts the ioctls KVM_SET_DEVICE_ATTR, +KVM_GET_DEVICE_ATTR, and KVM_HAS_DEVICE_ATTR. The interface uses the same struct +kvm_device_attr as other devices, but targets VCPU-wide settings and controls. + +The groups and attributes per virtual cpu, if any, are architecture specific. + +1. GROUP: KVM_ARM_VCPU_PMU_V3_CTRL +================================== + +:Architectures: ARM64 + +1.1. ATTRIBUTE: KVM_ARM_VCPU_PMU_V3_IRQ +--------------------------------------- + +:Parameters: in kvm_device_attr.addr the address for PMU overflow interrupt is a + pointer to an int + +Returns: + + ======= ======================================================== + -EBUSY The PMU overflow interrupt is already set + -ENXIO The overflow interrupt not set when attempting to get it + -ENODEV PMUv3 not supported + -EINVAL Invalid PMU overflow interrupt number supplied or + trying to set the IRQ number without using an in-kernel + irqchip. + ======= ======================================================== + +A value describing the PMUv3 (Performance Monitor Unit v3) overflow interrupt +number for this vcpu. This interrupt could be a PPI or SPI, but the interrupt +type must be same for each vcpu. As a PPI, the interrupt number is the same for +all vcpus, while as an SPI it must be a separate number per vcpu. + +1.2 ATTRIBUTE: KVM_ARM_VCPU_PMU_V3_INIT +--------------------------------------- + +:Parameters: no additional parameter in kvm_device_attr.addr + +Returns: + + ======= ====================================================== + -ENODEV PMUv3 not supported or GIC not initialized + -ENXIO PMUv3 not properly configured or in-kernel irqchip not + configured as required prior to calling this attribute + -EBUSY PMUv3 already initialized + ======= ====================================================== + +Request the initialization of the PMUv3. If using the PMUv3 with an in-kernel +virtual GIC implementation, this must be done after initializing the in-kernel +irqchip. + + +2. GROUP: KVM_ARM_VCPU_TIMER_CTRL +================================= + +:Architectures: ARM, ARM64 + +2.1. ATTRIBUTES: KVM_ARM_VCPU_TIMER_IRQ_VTIMER, KVM_ARM_VCPU_TIMER_IRQ_PTIMER +----------------------------------------------------------------------------- + +:Parameters: in kvm_device_attr.addr the address for the timer interrupt is a + pointer to an int + +Returns: + + ======= ================================= + -EINVAL Invalid timer interrupt number + -EBUSY One or more VCPUs has already run + ======= ================================= + +A value describing the architected timer interrupt number when connected to an +in-kernel virtual GIC. These must be a PPI (16 <= intid < 32). Setting the +attribute overrides the default values (see below). + +============================= ========================================== +KVM_ARM_VCPU_TIMER_IRQ_VTIMER The EL1 virtual timer intid (default: 27) +KVM_ARM_VCPU_TIMER_IRQ_PTIMER The EL1 physical timer intid (default: 30) +============================= ========================================== + +Setting the same PPI for different timers will prevent the VCPUs from running. +Setting the interrupt number on a VCPU configures all VCPUs created at that +time to use the number provided for a given timer, overwriting any previously +configured values on other VCPUs. Userspace should configure the interrupt +numbers on at least one VCPU after creating all VCPUs and before running any +VCPUs. + +3. GROUP: KVM_ARM_VCPU_PVTIME_CTRL +================================== + +:Architectures: ARM64 + +3.1 ATTRIBUTE: KVM_ARM_VCPU_PVTIME_IPA +-------------------------------------- + +:Parameters: 64-bit base address + +Returns: + + ======= ====================================== + -ENXIO Stolen time not implemented + -EEXIST Base address already set for this VCPU + -EINVAL Base address not 64 byte aligned + ======= ====================================== + +Specifies the base address of the stolen time structure for this VCPU. The +base address must be 64 byte aligned and exist within a valid guest memory +region. See Documentation/virt/kvm/arm/pvtime.txt for more information +including the layout of the stolen time structure. diff --git a/Documentation/virt/kvm/devices/vcpu.txt b/Documentation/virt/kvm/devices/vcpu.txt deleted file mode 100644 index 6f3bd64a05b0..000000000000 --- a/Documentation/virt/kvm/devices/vcpu.txt +++ /dev/null @@ -1,76 +0,0 @@ -Generic vcpu interface -==================================== - -The virtual cpu "device" also accepts the ioctls KVM_SET_DEVICE_ATTR, -KVM_GET_DEVICE_ATTR, and KVM_HAS_DEVICE_ATTR. The interface uses the same struct -kvm_device_attr as other devices, but targets VCPU-wide settings and controls. - -The groups and attributes per virtual cpu, if any, are architecture specific. - -1. GROUP: KVM_ARM_VCPU_PMU_V3_CTRL -Architectures: ARM64 - -1.1. ATTRIBUTE: KVM_ARM_VCPU_PMU_V3_IRQ -Parameters: in kvm_device_attr.addr the address for PMU overflow interrupt is a - pointer to an int -Returns: -EBUSY: The PMU overflow interrupt is already set - -ENXIO: The overflow interrupt not set when attempting to get it - -ENODEV: PMUv3 not supported - -EINVAL: Invalid PMU overflow interrupt number supplied or - trying to set the IRQ number without using an in-kernel - irqchip. - -A value describing the PMUv3 (Performance Monitor Unit v3) overflow interrupt -number for this vcpu. This interrupt could be a PPI or SPI, but the interrupt -type must be same for each vcpu. As a PPI, the interrupt number is the same for -all vcpus, while as an SPI it must be a separate number per vcpu. - -1.2 ATTRIBUTE: KVM_ARM_VCPU_PMU_V3_INIT -Parameters: no additional parameter in kvm_device_attr.addr -Returns: -ENODEV: PMUv3 not supported or GIC not initialized - -ENXIO: PMUv3 not properly configured or in-kernel irqchip not - configured as required prior to calling this attribute - -EBUSY: PMUv3 already initialized - -Request the initialization of the PMUv3. If using the PMUv3 with an in-kernel -virtual GIC implementation, this must be done after initializing the in-kernel -irqchip. - - -2. GROUP: KVM_ARM_VCPU_TIMER_CTRL -Architectures: ARM,ARM64 - -2.1. ATTRIBUTE: KVM_ARM_VCPU_TIMER_IRQ_VTIMER -2.2. ATTRIBUTE: KVM_ARM_VCPU_TIMER_IRQ_PTIMER -Parameters: in kvm_device_attr.addr the address for the timer interrupt is a - pointer to an int -Returns: -EINVAL: Invalid timer interrupt number - -EBUSY: One or more VCPUs has already run - -A value describing the architected timer interrupt number when connected to an -in-kernel virtual GIC. These must be a PPI (16 <= intid < 32). Setting the -attribute overrides the default values (see below). - -KVM_ARM_VCPU_TIMER_IRQ_VTIMER: The EL1 virtual timer intid (default: 27) -KVM_ARM_VCPU_TIMER_IRQ_PTIMER: The EL1 physical timer intid (default: 30) - -Setting the same PPI for different timers will prevent the VCPUs from running. -Setting the interrupt number on a VCPU configures all VCPUs created at that -time to use the number provided for a given timer, overwriting any previously -configured values on other VCPUs. Userspace should configure the interrupt -numbers on at least one VCPU after creating all VCPUs and before running any -VCPUs. - -3. GROUP: KVM_ARM_VCPU_PVTIME_CTRL -Architectures: ARM64 - -3.1 ATTRIBUTE: KVM_ARM_VCPU_PVTIME_IPA -Parameters: 64-bit base address -Returns: -ENXIO: Stolen time not implemented - -EEXIST: Base address already set for this VCPU - -EINVAL: Base address not 64 byte aligned - -Specifies the base address of the stolen time structure for this VCPU. The -base address must be 64 byte aligned and exist within a valid guest memory -region. See Documentation/virt/kvm/arm/pvtime.txt for more information -including the layout of the stolen time structure. diff --git a/Documentation/virt/kvm/devices/vfio.txt b/Documentation/virt/kvm/devices/vfio.rst index 528c77c8022c..2d20dc561069 100644 --- a/Documentation/virt/kvm/devices/vfio.txt +++ b/Documentation/virt/kvm/devices/vfio.rst @@ -1,8 +1,12 @@ +.. SPDX-License-Identifier: GPL-2.0 + +=================== VFIO virtual device =================== Device types supported: - KVM_DEV_TYPE_VFIO + + - KVM_DEV_TYPE_VFIO Only one VFIO instance may be created per VM. The created device tracks VFIO groups in use by the VM and features of those groups @@ -23,14 +27,15 @@ KVM_DEV_VFIO_GROUP attributes: for the VFIO group. KVM_DEV_VFIO_GROUP_SET_SPAPR_TCE: attaches a guest visible TCE table allocated by sPAPR KVM. - kvm_device_attr.addr points to a struct: + kvm_device_attr.addr points to a struct:: + + struct kvm_vfio_spapr_tce { + __s32 groupfd; + __s32 tablefd; + }; - struct kvm_vfio_spapr_tce { - __s32 groupfd; - __s32 tablefd; - }; + where: - where - @groupfd is a file descriptor for a VFIO group; - @tablefd is a file descriptor for a TCE table allocated via - KVM_CREATE_SPAPR_TCE. + - @groupfd is a file descriptor for a VFIO group; + - @tablefd is a file descriptor for a TCE table allocated via + KVM_CREATE_SPAPR_TCE. diff --git a/Documentation/virt/kvm/devices/vm.txt b/Documentation/virt/kvm/devices/vm.rst index 4ffb82b02468..0aa5b1cfd700 100644 --- a/Documentation/virt/kvm/devices/vm.txt +++ b/Documentation/virt/kvm/devices/vm.rst @@ -1,5 +1,8 @@ +.. SPDX-License-Identifier: GPL-2.0 + +==================== Generic vm interface -==================================== +==================== The virtual machine "device" also accepts the ioctls KVM_SET_DEVICE_ATTR, KVM_GET_DEVICE_ATTR, and KVM_HAS_DEVICE_ATTR. The interface uses the same @@ -10,30 +13,38 @@ The groups and attributes per virtual machine, if any, are architecture specific. 1. GROUP: KVM_S390_VM_MEM_CTRL -Architectures: s390 +============================== + +:Architectures: s390 1.1. ATTRIBUTE: KVM_S390_VM_MEM_ENABLE_CMMA -Parameters: none -Returns: -EBUSY if a vcpu is already defined, otherwise 0 +------------------------------------------- + +:Parameters: none +:Returns: -EBUSY if a vcpu is already defined, otherwise 0 Enables Collaborative Memory Management Assist (CMMA) for the virtual machine. 1.2. ATTRIBUTE: KVM_S390_VM_MEM_CLR_CMMA -Parameters: none -Returns: -EINVAL if CMMA was not enabled - 0 otherwise +---------------------------------------- + +:Parameters: none +:Returns: -EINVAL if CMMA was not enabled; + 0 otherwise Clear the CMMA status for all guest pages, so any pages the guest marked as unused are again used any may not be reclaimed by the host. 1.3. ATTRIBUTE KVM_S390_VM_MEM_LIMIT_SIZE -Parameters: in attr->addr the address for the new limit of guest memory -Returns: -EFAULT if the given address is not accessible - -EINVAL if the virtual machine is of type UCONTROL - -E2BIG if the given guest memory is to big for that machine - -EBUSY if a vcpu is already defined - -ENOMEM if not enough memory is available for a new shadow guest mapping - 0 otherwise +----------------------------------------- + +:Parameters: in attr->addr the address for the new limit of guest memory +:Returns: -EFAULT if the given address is not accessible; + -EINVAL if the virtual machine is of type UCONTROL; + -E2BIG if the given guest memory is to big for that machine; + -EBUSY if a vcpu is already defined; + -ENOMEM if not enough memory is available for a new shadow guest mapping; + 0 otherwise. Allows userspace to query the actual limit and set a new limit for the maximum guest memory size. The limit will be rounded up to @@ -42,78 +53,92 @@ the number of page table levels. In the case that there is no limit we will set the limit to KVM_S390_NO_MEM_LIMIT (U64_MAX). 2. GROUP: KVM_S390_VM_CPU_MODEL -Architectures: s390 +=============================== + +:Architectures: s390 2.1. ATTRIBUTE: KVM_S390_VM_CPU_MACHINE (r/o) +--------------------------------------------- -Allows user space to retrieve machine and kvm specific cpu related information: +Allows user space to retrieve machine and kvm specific cpu related information:: -struct kvm_s390_vm_cpu_machine { + struct kvm_s390_vm_cpu_machine { __u64 cpuid; # CPUID of host __u32 ibc; # IBC level range offered by host __u8 pad[4]; __u64 fac_mask[256]; # set of cpu facilities enabled by KVM __u64 fac_list[256]; # set of cpu facilities offered by host -} + } -Parameters: address of buffer to store the machine related cpu data - of type struct kvm_s390_vm_cpu_machine* -Returns: -EFAULT if the given address is not accessible from kernel space - -ENOMEM if not enough memory is available to process the ioctl - 0 in case of success +:Parameters: address of buffer to store the machine related cpu data + of type struct kvm_s390_vm_cpu_machine* +:Returns: -EFAULT if the given address is not accessible from kernel space; + -ENOMEM if not enough memory is available to process the ioctl; + 0 in case of success. 2.2. ATTRIBUTE: KVM_S390_VM_CPU_PROCESSOR (r/w) +=============================================== -Allows user space to retrieve or request to change cpu related information for a vcpu: +Allows user space to retrieve or request to change cpu related information for a vcpu:: -struct kvm_s390_vm_cpu_processor { + struct kvm_s390_vm_cpu_processor { __u64 cpuid; # CPUID currently (to be) used by this vcpu __u16 ibc; # IBC level currently (to be) used by this vcpu __u8 pad[6]; __u64 fac_list[256]; # set of cpu facilities currently (to be) used - # by this vcpu -} + # by this vcpu + } KVM does not enforce or limit the cpu model data in any form. Take the information retrieved by means of KVM_S390_VM_CPU_MACHINE as hint for reasonable configuration setups. Instruction interceptions triggered by additionally set facility bits that are not handled by KVM need to by imlemented in the VM driver code. -Parameters: address of buffer to store/set the processor related cpu - data of type struct kvm_s390_vm_cpu_processor*. -Returns: -EBUSY in case 1 or more vcpus are already activated (only in write case) - -EFAULT if the given address is not accessible from kernel space - -ENOMEM if not enough memory is available to process the ioctl - 0 in case of success +:Parameters: address of buffer to store/set the processor related cpu + data of type struct kvm_s390_vm_cpu_processor*. +:Returns: -EBUSY in case 1 or more vcpus are already activated (only in write case); + -EFAULT if the given address is not accessible from kernel space; + -ENOMEM if not enough memory is available to process the ioctl; + 0 in case of success. + +.. _KVM_S390_VM_CPU_MACHINE_FEAT: 2.3. ATTRIBUTE: KVM_S390_VM_CPU_MACHINE_FEAT (r/o) +-------------------------------------------------- Allows user space to retrieve available cpu features. A feature is available if provided by the hardware and supported by kvm. In theory, cpu features could even be completely emulated by kvm. -struct kvm_s390_vm_cpu_feat { - __u64 feat[16]; # Bitmap (1 = feature available), MSB 0 bit numbering -}; +:: -Parameters: address of a buffer to load the feature list from. -Returns: -EFAULT if the given address is not accessible from kernel space. - 0 in case of success. + struct kvm_s390_vm_cpu_feat { + __u64 feat[16]; # Bitmap (1 = feature available), MSB 0 bit numbering + }; + +:Parameters: address of a buffer to load the feature list from. +:Returns: -EFAULT if the given address is not accessible from kernel space; + 0 in case of success. 2.4. ATTRIBUTE: KVM_S390_VM_CPU_PROCESSOR_FEAT (r/w) +---------------------------------------------------- Allows user space to retrieve or change enabled cpu features for all VCPUs of a VM. Features that are not available cannot be enabled. -See 2.3. for a description of the parameter struct. +See :ref:`KVM_S390_VM_CPU_MACHINE_FEAT` for +a description of the parameter struct. -Parameters: address of a buffer to store/load the feature list from. -Returns: -EFAULT if the given address is not accessible from kernel space. - -EINVAL if a cpu feature that is not available is to be enabled. - -EBUSY if at least one VCPU has already been defined. +:Parameters: address of a buffer to store/load the feature list from. +:Returns: -EFAULT if the given address is not accessible from kernel space; + -EINVAL if a cpu feature that is not available is to be enabled; + -EBUSY if at least one VCPU has already been defined; 0 in case of success. +.. _KVM_S390_VM_CPU_MACHINE_SUBFUNC: + 2.5. ATTRIBUTE: KVM_S390_VM_CPU_MACHINE_SUBFUNC (r/o) +----------------------------------------------------- Allows user space to retrieve available cpu subfunctions without any filtering done by a set IBC. These subfunctions are indicated to the guest VCPU via @@ -126,7 +151,9 @@ contained in the returned struct. If the affected instruction indicates subfunctions via a "test bit" mechanism, the subfunction codes are contained in the returned struct in MSB 0 bit numbering. -struct kvm_s390_vm_cpu_subfunc { +:: + + struct kvm_s390_vm_cpu_subfunc { u8 plo[32]; # always valid (ESA/390 feature) u8 ptff[16]; # valid with TOD-clock steering u8 kmac[16]; # valid with Message-Security-Assist @@ -143,13 +170,14 @@ struct kvm_s390_vm_cpu_subfunc { u8 kma[16]; # valid with Message-Security-Assist-Extension 8 u8 kdsa[16]; # valid with Message-Security-Assist-Extension 9 u8 reserved[1792]; # reserved for future instructions -}; + }; -Parameters: address of a buffer to load the subfunction blocks from. -Returns: -EFAULT if the given address is not accessible from kernel space. +:Parameters: address of a buffer to load the subfunction blocks from. +:Returns: -EFAULT if the given address is not accessible from kernel space; 0 in case of success. 2.6. ATTRIBUTE: KVM_S390_VM_CPU_PROCESSOR_SUBFUNC (r/w) +------------------------------------------------------- Allows user space to retrieve or change cpu subfunctions to be indicated for all VCPUs of a VM. This attribute will only be available if kernel and @@ -164,107 +192,125 @@ As long as no data has been written, a read will fail. The IBC will be used to determine available subfunctions in this case, this will guarantee backward compatibility. -See 2.5. for a description of the parameter struct. +See :ref:`KVM_S390_VM_CPU_MACHINE_SUBFUNC` for a +description of the parameter struct. -Parameters: address of a buffer to store/load the subfunction blocks from. -Returns: -EFAULT if the given address is not accessible from kernel space. - -EINVAL when reading, if there was no write yet. - -EBUSY if at least one VCPU has already been defined. +:Parameters: address of a buffer to store/load the subfunction blocks from. +:Returns: -EFAULT if the given address is not accessible from kernel space; + -EINVAL when reading, if there was no write yet; + -EBUSY if at least one VCPU has already been defined; 0 in case of success. 3. GROUP: KVM_S390_VM_TOD -Architectures: s390 +========================= + +:Architectures: s390 3.1. ATTRIBUTE: KVM_S390_VM_TOD_HIGH +------------------------------------ Allows user space to set/get the TOD clock extension (u8) (superseded by KVM_S390_VM_TOD_EXT). -Parameters: address of a buffer in user space to store the data (u8) to -Returns: -EFAULT if the given address is not accessible from kernel space +:Parameters: address of a buffer in user space to store the data (u8) to +:Returns: -EFAULT if the given address is not accessible from kernel space; -EINVAL if setting the TOD clock extension to != 0 is not supported 3.2. ATTRIBUTE: KVM_S390_VM_TOD_LOW +----------------------------------- Allows user space to set/get bits 0-63 of the TOD clock register as defined in the POP (u64). -Parameters: address of a buffer in user space to store the data (u64) to -Returns: -EFAULT if the given address is not accessible from kernel space +:Parameters: address of a buffer in user space to store the data (u64) to +:Returns: -EFAULT if the given address is not accessible from kernel space 3.3. ATTRIBUTE: KVM_S390_VM_TOD_EXT +----------------------------------- + Allows user space to set/get bits 0-63 of the TOD clock register as defined in the POP (u64). If the guest CPU model supports the TOD clock extension (u8), it also allows user space to get/set it. If the guest CPU model does not support it, it is stored as 0 and not allowed to be set to a value != 0. -Parameters: address of a buffer in user space to store the data - (kvm_s390_vm_tod_clock) to -Returns: -EFAULT if the given address is not accessible from kernel space +:Parameters: address of a buffer in user space to store the data + (kvm_s390_vm_tod_clock) to +:Returns: -EFAULT if the given address is not accessible from kernel space; -EINVAL if setting the TOD clock extension to != 0 is not supported 4. GROUP: KVM_S390_VM_CRYPTO -Architectures: s390 +============================ + +:Architectures: s390 4.1. ATTRIBUTE: KVM_S390_VM_CRYPTO_ENABLE_AES_KW (w/o) +------------------------------------------------------ Allows user space to enable aes key wrapping, including generating a new wrapping key. -Parameters: none -Returns: 0 +:Parameters: none +:Returns: 0 4.2. ATTRIBUTE: KVM_S390_VM_CRYPTO_ENABLE_DEA_KW (w/o) +------------------------------------------------------ Allows user space to enable dea key wrapping, including generating a new wrapping key. -Parameters: none -Returns: 0 +:Parameters: none +:Returns: 0 4.3. ATTRIBUTE: KVM_S390_VM_CRYPTO_DISABLE_AES_KW (w/o) +------------------------------------------------------- Allows user space to disable aes key wrapping, clearing the wrapping key. -Parameters: none -Returns: 0 +:Parameters: none +:Returns: 0 4.4. ATTRIBUTE: KVM_S390_VM_CRYPTO_DISABLE_DEA_KW (w/o) +------------------------------------------------------- Allows user space to disable dea key wrapping, clearing the wrapping key. -Parameters: none -Returns: 0 +:Parameters: none +:Returns: 0 5. GROUP: KVM_S390_VM_MIGRATION -Architectures: s390 +=============================== + +:Architectures: s390 5.1. ATTRIBUTE: KVM_S390_VM_MIGRATION_STOP (w/o) +------------------------------------------------ Allows userspace to stop migration mode, needed for PGSTE migration. Setting this attribute when migration mode is not active will have no effects. -Parameters: none -Returns: 0 +:Parameters: none +:Returns: 0 5.2. ATTRIBUTE: KVM_S390_VM_MIGRATION_START (w/o) +------------------------------------------------- Allows userspace to start migration mode, needed for PGSTE migration. Setting this attribute when migration mode is already active will have no effects. -Parameters: none -Returns: -ENOMEM if there is not enough free memory to start migration mode - -EINVAL if the state of the VM is invalid (e.g. no memory defined) +:Parameters: none +:Returns: -ENOMEM if there is not enough free memory to start migration mode; + -EINVAL if the state of the VM is invalid (e.g. no memory defined); 0 in case of success. 5.3. ATTRIBUTE: KVM_S390_VM_MIGRATION_STATUS (r/o) +-------------------------------------------------- Allows userspace to query the status of migration mode. -Parameters: address of a buffer in user space to store the data (u64) to; - the data itself is either 0 if migration mode is disabled or 1 - if it is enabled -Returns: -EFAULT if the given address is not accessible from kernel space +:Parameters: address of a buffer in user space to store the data (u64) to; + the data itself is either 0 if migration mode is disabled or 1 + if it is enabled +:Returns: -EFAULT if the given address is not accessible from kernel space; 0 in case of success. diff --git a/Documentation/virt/kvm/devices/xics.txt b/Documentation/virt/kvm/devices/xics.rst index 423332dda7bc..2d6927e0b776 100644 --- a/Documentation/virt/kvm/devices/xics.txt +++ b/Documentation/virt/kvm/devices/xics.rst @@ -1,20 +1,31 @@ +.. SPDX-License-Identifier: GPL-2.0 + +========================= XICS interrupt controller +========================= Device type supported: KVM_DEV_TYPE_XICS Groups: 1. KVM_DEV_XICS_GRP_SOURCES - Attributes: One per interrupt source, indexed by the source number. + Attributes: + One per interrupt source, indexed by the source number. 2. KVM_DEV_XICS_GRP_CTRL - Attributes: - 2.1 KVM_DEV_XICS_NR_SERVERS (write only) + Attributes: + + 2.1 KVM_DEV_XICS_NR_SERVERS (write only) + The kvm_device_attr.addr points to a __u32 value which is the number of interrupt server numbers (ie, highest possible vcpu id plus one). + Errors: - -EINVAL: Value greater than KVM_MAX_VCPU_ID. - -EFAULT: Invalid user pointer for attr->addr. - -EBUSY: A vcpu is already connected to the device. + + ======= ========================================== + -EINVAL Value greater than KVM_MAX_VCPU_ID. + -EFAULT Invalid user pointer for attr->addr. + -EBUSY A vcpu is already connected to the device. + ======= ========================================== This device emulates the XICS (eXternal Interrupt Controller Specification) defined in PAPR. The XICS has a set of interrupt @@ -53,24 +64,29 @@ the interrupt source number. The 64 bit state word has the following bitfields, starting from the least-significant end of the word: * Destination (server number), 32 bits + This specifies where the interrupt should be sent, and is the interrupt server number specified for the destination vcpu. * Priority, 8 bits + This is the priority specified for this interrupt source, where 0 is the highest priority and 255 is the lowest. An interrupt with a priority of 255 will never be delivered. * Level sensitive flag, 1 bit + This bit is 1 for a level-sensitive interrupt source, or 0 for edge-sensitive (or MSI). * Masked flag, 1 bit + This bit is set to 1 if the interrupt is masked (cannot be delivered regardless of its priority), for example by the ibm,int-off RTAS call, or 0 if it is not masked. * Pending flag, 1 bit + This bit is 1 if the source has a pending interrupt, otherwise 0. Only one XICS instance may be created per VM. diff --git a/Documentation/virt/kvm/devices/xive.txt b/Documentation/virt/kvm/devices/xive.rst index f5d1d6b5af61..8bdf3dc38f01 100644 --- a/Documentation/virt/kvm/devices/xive.txt +++ b/Documentation/virt/kvm/devices/xive.rst @@ -1,8 +1,11 @@ +.. SPDX-License-Identifier: GPL-2.0 + +=========================================================== POWER9 eXternal Interrupt Virtualization Engine (XIVE Gen1) -========================================================== +=========================================================== Device types supported: - KVM_DEV_TYPE_XIVE POWER9 XIVE Interrupt Controller generation 1 + - KVM_DEV_TYPE_XIVE POWER9 XIVE Interrupt Controller generation 1 This device acts as a VM interrupt controller. It provides the KVM interface to configure the interrupt sources of a VM in the underlying @@ -64,72 +67,100 @@ the legacy interrupt mode, referred as XICS (POWER7/8). * Groups: - 1. KVM_DEV_XIVE_GRP_CTRL - Provides global controls on the device +1. KVM_DEV_XIVE_GRP_CTRL + Provides global controls on the device + Attributes: 1.1 KVM_DEV_XIVE_RESET (write only) Resets the interrupt controller configuration for sources and event queues. To be used by kexec and kdump. + Errors: none 1.2 KVM_DEV_XIVE_EQ_SYNC (write only) Sync all the sources and queues and mark the EQ pages dirty. This to make sure that a consistent memory state is captured when migrating the VM. + Errors: none 1.3 KVM_DEV_XIVE_NR_SERVERS (write only) The kvm_device_attr.addr points to a __u32 value which is the number of interrupt server numbers (ie, highest possible vcpu id plus one). + Errors: - -EINVAL: Value greater than KVM_MAX_VCPU_ID. - -EFAULT: Invalid user pointer for attr->addr. - -EBUSY: A vCPU is already connected to the device. - 2. KVM_DEV_XIVE_GRP_SOURCE (write only) - Initializes a new source in the XIVE device and mask it. + ======= ========================================== + -EINVAL Value greater than KVM_MAX_VCPU_ID. + -EFAULT Invalid user pointer for attr->addr. + -EBUSY A vCPU is already connected to the device. + ======= ========================================== + +2. KVM_DEV_XIVE_GRP_SOURCE (write only) + Initializes a new source in the XIVE device and mask it. + Attributes: Interrupt source number (64-bit) - The kvm_device_attr.addr points to a __u64 value: - bits: | 63 .... 2 | 1 | 0 - values: | unused | level | type + + The kvm_device_attr.addr points to a __u64 value:: + + bits: | 63 .... 2 | 1 | 0 + values: | unused | level | type + - type: 0:MSI 1:LSI - level: assertion level in case of an LSI. + Errors: - -E2BIG: Interrupt source number is out of range - -ENOMEM: Could not create a new source block - -EFAULT: Invalid user pointer for attr->addr. - -ENXIO: Could not allocate underlying HW interrupt - 3. KVM_DEV_XIVE_GRP_SOURCE_CONFIG (write only) - Configures source targeting + ======= ========================================== + -E2BIG Interrupt source number is out of range + -ENOMEM Could not create a new source block + -EFAULT Invalid user pointer for attr->addr. + -ENXIO Could not allocate underlying HW interrupt + ======= ========================================== + +3. KVM_DEV_XIVE_GRP_SOURCE_CONFIG (write only) + Configures source targeting + Attributes: Interrupt source number (64-bit) - The kvm_device_attr.addr points to a __u64 value: - bits: | 63 .... 33 | 32 | 31 .. 3 | 2 .. 0 - values: | eisn | mask | server | priority + + The kvm_device_attr.addr points to a __u64 value:: + + bits: | 63 .... 33 | 32 | 31 .. 3 | 2 .. 0 + values: | eisn | mask | server | priority + - priority: 0-7 interrupt priority level - server: CPU number chosen to handle the interrupt - mask: mask flag (unused) - eisn: Effective Interrupt Source Number + Errors: - -ENOENT: Unknown source number - -EINVAL: Not initialized source number - -EINVAL: Invalid priority - -EINVAL: Invalid CPU number. - -EFAULT: Invalid user pointer for attr->addr. - -ENXIO: CPU event queues not configured or configuration of the - underlying HW interrupt failed - -EBUSY: No CPU available to serve interrupt - - 4. KVM_DEV_XIVE_GRP_EQ_CONFIG (read-write) - Configures an event queue of a CPU + + ======= ======================================================= + -ENOENT Unknown source number + -EINVAL Not initialized source number + -EINVAL Invalid priority + -EINVAL Invalid CPU number. + -EFAULT Invalid user pointer for attr->addr. + -ENXIO CPU event queues not configured or configuration of the + underlying HW interrupt failed + -EBUSY No CPU available to serve interrupt + ======= ======================================================= + +4. KVM_DEV_XIVE_GRP_EQ_CONFIG (read-write) + Configures an event queue of a CPU + Attributes: EQ descriptor identifier (64-bit) - The EQ descriptor identifier is a tuple (server, priority) : - bits: | 63 .... 32 | 31 .. 3 | 2 .. 0 - values: | unused | server | priority - The kvm_device_attr.addr points to : + + The EQ descriptor identifier is a tuple (server, priority):: + + bits: | 63 .... 32 | 31 .. 3 | 2 .. 0 + values: | unused | server | priority + + The kvm_device_attr.addr points to:: + struct kvm_ppc_xive_eq { __u32 flags; __u32 qshift; @@ -138,8 +169,9 @@ the legacy interrupt mode, referred as XICS (POWER7/8). __u32 qindex; __u8 pad[40]; }; + - flags: queue flags - KVM_XIVE_EQ_ALWAYS_NOTIFY (required) + KVM_XIVE_EQ_ALWAYS_NOTIFY (required) forces notification without using the coalescing mechanism provided by the XIVE END ESBs. - qshift: queue size (power of 2) @@ -147,22 +179,31 @@ the legacy interrupt mode, referred as XICS (POWER7/8). - qtoggle: current queue toggle bit - qindex: current queue index - pad: reserved for future use + Errors: - -ENOENT: Invalid CPU number - -EINVAL: Invalid priority - -EINVAL: Invalid flags - -EINVAL: Invalid queue size - -EINVAL: Invalid queue address - -EFAULT: Invalid user pointer for attr->addr. - -EIO: Configuration of the underlying HW failed - - 5. KVM_DEV_XIVE_GRP_SOURCE_SYNC (write only) - Synchronize the source to flush event notifications + + ======= ========================================= + -ENOENT Invalid CPU number + -EINVAL Invalid priority + -EINVAL Invalid flags + -EINVAL Invalid queue size + -EINVAL Invalid queue address + -EFAULT Invalid user pointer for attr->addr. + -EIO Configuration of the underlying HW failed + ======= ========================================= + +5. KVM_DEV_XIVE_GRP_SOURCE_SYNC (write only) + Synchronize the source to flush event notifications + Attributes: Interrupt source number (64-bit) + Errors: - -ENOENT: Unknown source number - -EINVAL: Not initialized source number + + ======= ============================= + -ENOENT Unknown source number + -EINVAL Not initialized source number + ======= ============================= * VCPU state @@ -175,11 +216,12 @@ the legacy interrupt mode, referred as XICS (POWER7/8). as it synthesizes the priorities of the pending interrupts. We capture a bit more to report debug information. - KVM_REG_PPC_VP_STATE (2 * 64bits) - bits: | 63 .... 32 | 31 .... 0 | - values: | TIMA word0 | TIMA word1 | - bits: | 127 .......... 64 | - values: | unused | + KVM_REG_PPC_VP_STATE (2 * 64bits):: + + bits: | 63 .... 32 | 31 .... 0 | + values: | TIMA word0 | TIMA word1 | + bits: | 127 .......... 64 | + values: | unused | * Migration: @@ -196,7 +238,7 @@ the legacy interrupt mode, referred as XICS (POWER7/8). 3. Capture the state of the source targeting, the EQs configuration and the state of thread interrupt context registers. - Restore is similar : + Restore is similar: 1. Restore the EQ configuration. As targeting depends on it. 2. Restore targeting diff --git a/Documentation/virt/kvm/halt-polling.txt b/Documentation/virt/kvm/halt-polling.rst index 4f791b128dd2..4922e4a15f18 100644 --- a/Documentation/virt/kvm/halt-polling.txt +++ b/Documentation/virt/kvm/halt-polling.rst @@ -1,3 +1,6 @@ +.. SPDX-License-Identifier: GPL-2.0 + +=========================== The KVM halt polling system =========================== @@ -68,7 +71,8 @@ steady state polling interval but will only really do a good job for wakeups which come at an approximately constant rate, otherwise there will be constant adjustment of the polling interval. -[0] total block time: the time between when the halt polling function is +[0] total block time: + the time between when the halt polling function is invoked and a wakeup source received (irrespective of whether the scheduler is invoked within that function). @@ -81,31 +85,32 @@ shrunk. These variables are defined in include/linux/kvm_host.h and as module parameters in virt/kvm/kvm_main.c, or arch/powerpc/kvm/book3s_hv.c in the powerpc kvm-hv case. -Module Parameter | Description | Default Value --------------------------------------------------------------------------------- -halt_poll_ns | The global max polling | KVM_HALT_POLL_NS_DEFAULT - | interval which defines | - | the ceiling value of the | - | polling interval for | (per arch value) - | each vcpu. | --------------------------------------------------------------------------------- -halt_poll_ns_grow | The value by which the | 2 - | halt polling interval is | - | multiplied in the | - | grow_halt_poll_ns() | - | function. | --------------------------------------------------------------------------------- -halt_poll_ns_grow_start | The initial value to grow | 10000 - | to from zero in the | - | grow_halt_poll_ns() | - | function. | --------------------------------------------------------------------------------- -halt_poll_ns_shrink | The value by which the | 0 - | halt polling interval is | - | divided in the | - | shrink_halt_poll_ns() | - | function. | --------------------------------------------------------------------------------- ++-----------------------+---------------------------+-------------------------+ +|Module Parameter | Description | Default Value | ++-----------------------+---------------------------+-------------------------+ +|halt_poll_ns | The global max polling | KVM_HALT_POLL_NS_DEFAULT| +| | interval which defines | | +| | the ceiling value of the | | +| | polling interval for | (per arch value) | +| | each vcpu. | | ++-----------------------+---------------------------+-------------------------+ +|halt_poll_ns_grow | The value by which the | 2 | +| | halt polling interval is | | +| | multiplied in the | | +| | grow_halt_poll_ns() | | +| | function. | | ++-----------------------+---------------------------+-------------------------+ +|halt_poll_ns_grow_start| The initial value to grow | 10000 | +| | to from zero in the | | +| | grow_halt_poll_ns() | | +| | function. | | ++-----------------------+---------------------------+-------------------------+ +|halt_poll_ns_shrink | The value by which the | 0 | +| | halt polling interval is | | +| | divided in the | | +| | shrink_halt_poll_ns() | | +| | function. | | ++-----------------------+---------------------------+-------------------------+ These module parameters can be set from the debugfs files in: @@ -117,20 +122,19 @@ Note: that these module parameters are system wide values and are not able to Further Notes ============= -- Care should be taken when setting the halt_poll_ns module parameter as a -large value has the potential to drive the cpu usage to 100% on a machine which -would be almost entirely idle otherwise. This is because even if a guest has -wakeups during which very little work is done and which are quite far apart, if -the period is shorter than the global max polling interval (halt_poll_ns) then -the host will always poll for the entire block time and thus cpu utilisation -will go to 100%. - -- Halt polling essentially presents a trade off between power usage and latency -and the module parameters should be used to tune the affinity for this. Idle -cpu time is essentially converted to host kernel time with the aim of decreasing -latency when entering the guest. - -- Halt polling will only be conducted by the host when no other tasks are -runnable on that cpu, otherwise the polling will cease immediately and -schedule will be invoked to allow that other task to run. Thus this doesn't -allow a guest to denial of service the cpu. +- Care should be taken when setting the halt_poll_ns module parameter as a large value + has the potential to drive the cpu usage to 100% on a machine which would be almost + entirely idle otherwise. This is because even if a guest has wakeups during which very + little work is done and which are quite far apart, if the period is shorter than the + global max polling interval (halt_poll_ns) then the host will always poll for the + entire block time and thus cpu utilisation will go to 100%. + +- Halt polling essentially presents a trade off between power usage and latency and + the module parameters should be used to tune the affinity for this. Idle cpu time is + essentially converted to host kernel time with the aim of decreasing latency when + entering the guest. + +- Halt polling will only be conducted by the host when no other tasks are runnable on + that cpu, otherwise the polling will cease immediately and schedule will be invoked to + allow that other task to run. Thus this doesn't allow a guest to denial of service the + cpu. diff --git a/Documentation/virt/kvm/hypercalls.txt b/Documentation/virt/kvm/hypercalls.rst index 5f6d291bd004..dbaf207e560d 100644 --- a/Documentation/virt/kvm/hypercalls.txt +++ b/Documentation/virt/kvm/hypercalls.rst @@ -1,5 +1,9 @@ -Linux KVM Hypercall: +.. SPDX-License-Identifier: GPL-2.0 + +=================== +Linux KVM Hypercall =================== + X86: KVM Hypercalls have a three-byte sequence of either the vmcall or the vmmcall instruction. The hypervisor can replace it with instructions that are @@ -20,7 +24,7 @@ S390: For further information on the S390 diagnose call as supported by KVM, refer to Documentation/virt/kvm/s390-diag.txt. - PowerPC: +PowerPC: It uses R3-R10 and hypercall number in R11. R4-R11 are used as output registers. Return value is placed in R3. @@ -34,7 +38,8 @@ MIPS: the return value is placed in $2 (v0). KVM Hypercalls Documentation -=========================== +============================ + The template for each hypercall is: 1. Hypercall name. 2. Architecture(s) @@ -43,56 +48,64 @@ The template for each hypercall is: 1. KVM_HC_VAPIC_POLL_IRQ ------------------------ -Architecture: x86 -Status: active -Purpose: Trigger guest exit so that the host can check for pending -interrupts on reentry. + +:Architecture: x86 +:Status: active +:Purpose: Trigger guest exit so that the host can check for pending + interrupts on reentry. 2. KVM_HC_MMU_OP ------------------------- -Architecture: x86 -Status: deprecated. -Purpose: Support MMU operations such as writing to PTE, -flushing TLB, release PT. +---------------- + +:Architecture: x86 +:Status: deprecated. +:Purpose: Support MMU operations such as writing to PTE, + flushing TLB, release PT. 3. KVM_HC_FEATURES ------------------------- -Architecture: PPC -Status: active -Purpose: Expose hypercall availability to the guest. On x86 platforms, cpuid -used to enumerate which hypercalls are available. On PPC, either device tree -based lookup ( which is also what EPAPR dictates) OR KVM specific enumeration -mechanism (which is this hypercall) can be used. +------------------ + +:Architecture: PPC +:Status: active +:Purpose: Expose hypercall availability to the guest. On x86 platforms, cpuid + used to enumerate which hypercalls are available. On PPC, either + device tree based lookup ( which is also what EPAPR dictates) + OR KVM specific enumeration mechanism (which is this hypercall) + can be used. 4. KVM_HC_PPC_MAP_MAGIC_PAGE ------------------------- -Architecture: PPC -Status: active -Purpose: To enable communication between the hypervisor and guest there is a -shared page that contains parts of supervisor visible register state. -The guest can map this shared page to access its supervisor register through -memory using this hypercall. +---------------------------- + +:Architecture: PPC +:Status: active +:Purpose: To enable communication between the hypervisor and guest there is a + shared page that contains parts of supervisor visible register state. + The guest can map this shared page to access its supervisor register + through memory using this hypercall. 5. KVM_HC_KICK_CPU ------------------------- -Architecture: x86 -Status: active -Purpose: Hypercall used to wakeup a vcpu from HLT state -Usage example : A vcpu of a paravirtualized guest that is busywaiting in guest -kernel mode for an event to occur (ex: a spinlock to become available) can -execute HLT instruction once it has busy-waited for more than a threshold -time-interval. Execution of HLT instruction would cause the hypervisor to put -the vcpu to sleep until occurrence of an appropriate event. Another vcpu of the -same guest can wakeup the sleeping vcpu by issuing KVM_HC_KICK_CPU hypercall, -specifying APIC ID (a1) of the vcpu to be woken up. An additional argument (a0) -is used in the hypercall for future use. +------------------ + +:Architecture: x86 +:Status: active +:Purpose: Hypercall used to wakeup a vcpu from HLT state +:Usage example: + A vcpu of a paravirtualized guest that is busywaiting in guest + kernel mode for an event to occur (ex: a spinlock to become available) can + execute HLT instruction once it has busy-waited for more than a threshold + time-interval. Execution of HLT instruction would cause the hypervisor to put + the vcpu to sleep until occurrence of an appropriate event. Another vcpu of the + same guest can wakeup the sleeping vcpu by issuing KVM_HC_KICK_CPU hypercall, + specifying APIC ID (a1) of the vcpu to be woken up. An additional argument (a0) + is used in the hypercall for future use. 6. KVM_HC_CLOCK_PAIRING ------------------------- -Architecture: x86 -Status: active -Purpose: Hypercall used to synchronize host and guest clocks. +----------------------- +:Architecture: x86 +:Status: active +:Purpose: Hypercall used to synchronize host and guest clocks. + Usage: a0: guest physical address where host copies @@ -101,6 +114,8 @@ a0: guest physical address where host copies a1: clock_type, ATM only KVM_CLOCK_PAIRING_WALLCLOCK (0) is supported (corresponding to the host's CLOCK_REALTIME clock). + :: + struct kvm_clock_pairing { __s64 sec; __s64 nsec; @@ -123,15 +138,16 @@ Returns KVM_EOPNOTSUPP if the host does not use TSC clocksource, or if clock type is different than KVM_CLOCK_PAIRING_WALLCLOCK. 6. KVM_HC_SEND_IPI ------------------------- -Architecture: x86 -Status: active -Purpose: Send IPIs to multiple vCPUs. +------------------ + +:Architecture: x86 +:Status: active +:Purpose: Send IPIs to multiple vCPUs. -a0: lower part of the bitmap of destination APIC IDs -a1: higher part of the bitmap of destination APIC IDs -a2: the lowest APIC ID in bitmap -a3: APIC ICR +- a0: lower part of the bitmap of destination APIC IDs +- a1: higher part of the bitmap of destination APIC IDs +- a2: the lowest APIC ID in bitmap +- a3: APIC ICR The hypercall lets a guest send multicast IPIs, with at most 128 128 destinations per hypercall in 64-bit mode and 64 vCPUs per @@ -143,12 +159,13 @@ corresponds to the APIC ID a2+1, and so on. Returns the number of CPUs to which the IPIs were delivered successfully. 7. KVM_HC_SCHED_YIELD ------------------------- -Architecture: x86 -Status: active -Purpose: Hypercall used to yield if the IPI target vCPU is preempted +--------------------- + +:Architecture: x86 +:Status: active +:Purpose: Hypercall used to yield if the IPI target vCPU is preempted a0: destination APIC ID -Usage example: When sending a call-function IPI-many to vCPUs, yield if -any of the IPI target vCPUs was preempted. +:Usage example: When sending a call-function IPI-many to vCPUs, yield if + any of the IPI target vCPUs was preempted. diff --git a/Documentation/virt/kvm/index.rst b/Documentation/virt/kvm/index.rst index ada224a511fe..774deaebf7fa 100644 --- a/Documentation/virt/kvm/index.rst +++ b/Documentation/virt/kvm/index.rst @@ -7,6 +7,22 @@ KVM .. toctree:: :maxdepth: 2 + api amd-memory-encryption cpuid + halt-polling + hypercalls + locking + mmu + msr + nested-vmx + ppc-pv + s390-diag + timekeeping vcpu-requests + + review-checklist + + arm/index + + devices/index diff --git a/Documentation/virt/kvm/locking.rst b/Documentation/virt/kvm/locking.rst new file mode 100644 index 000000000000..c02291beac3f --- /dev/null +++ b/Documentation/virt/kvm/locking.rst @@ -0,0 +1,243 @@ +.. SPDX-License-Identifier: GPL-2.0 + +================= +KVM Lock Overview +================= + +1. Acquisition Orders +--------------------- + +The acquisition orders for mutexes are as follows: + +- kvm->lock is taken outside vcpu->mutex + +- kvm->lock is taken outside kvm->slots_lock and kvm->irq_lock + +- kvm->slots_lock is taken outside kvm->irq_lock, though acquiring + them together is quite rare. + +On x86, vcpu->mutex is taken outside kvm->arch.hyperv.hv_lock. + +Everything else is a leaf: no other lock is taken inside the critical +sections. + +2. Exception +------------ + +Fast page fault: + +Fast page fault is the fast path which fixes the guest page fault out of +the mmu-lock on x86. Currently, the page fault can be fast in one of the +following two cases: + +1. Access Tracking: The SPTE is not present, but it is marked for access + tracking i.e. the SPTE_SPECIAL_MASK is set. That means we need to + restore the saved R/X bits. This is described in more detail later below. + +2. Write-Protection: The SPTE is present and the fault is + caused by write-protect. That means we just need to change the W bit of + the spte. + +What we use to avoid all the race is the SPTE_HOST_WRITEABLE bit and +SPTE_MMU_WRITEABLE bit on the spte: + +- SPTE_HOST_WRITEABLE means the gfn is writable on host. +- SPTE_MMU_WRITEABLE means the gfn is writable on mmu. The bit is set when + the gfn is writable on guest mmu and it is not write-protected by shadow + page write-protection. + +On fast page fault path, we will use cmpxchg to atomically set the spte W +bit if spte.SPTE_HOST_WRITEABLE = 1 and spte.SPTE_WRITE_PROTECT = 1, or +restore the saved R/X bits if VMX_EPT_TRACK_ACCESS mask is set, or both. This +is safe because whenever changing these bits can be detected by cmpxchg. + +But we need carefully check these cases: + +1) The mapping from gfn to pfn + +The mapping from gfn to pfn may be changed since we can only ensure the pfn +is not changed during cmpxchg. This is a ABA problem, for example, below case +will happen: + ++------------------------------------------------------------------------+ +| At the beginning:: | +| | +| gpte = gfn1 | +| gfn1 is mapped to pfn1 on host | +| spte is the shadow page table entry corresponding with gpte and | +| spte = pfn1 | ++------------------------------------------------------------------------+ +| On fast page fault path: | ++------------------------------------+-----------------------------------+ +| CPU 0: | CPU 1: | ++------------------------------------+-----------------------------------+ +| :: | | +| | | +| old_spte = *spte; | | ++------------------------------------+-----------------------------------+ +| | pfn1 is swapped out:: | +| | | +| | spte = 0; | +| | | +| | pfn1 is re-alloced for gfn2. | +| | | +| | gpte is changed to point to | +| | gfn2 by the guest:: | +| | | +| | spte = pfn1; | ++------------------------------------+-----------------------------------+ +| :: | +| | +| if (cmpxchg(spte, old_spte, old_spte+W) | +| mark_page_dirty(vcpu->kvm, gfn1) | +| OOPS!!! | ++------------------------------------------------------------------------+ + +We dirty-log for gfn1, that means gfn2 is lost in dirty-bitmap. + +For direct sp, we can easily avoid it since the spte of direct sp is fixed +to gfn. For indirect sp, before we do cmpxchg, we call gfn_to_pfn_atomic() +to pin gfn to pfn, because after gfn_to_pfn_atomic(): + +- We have held the refcount of pfn that means the pfn can not be freed and + be reused for another gfn. +- The pfn is writable that means it can not be shared between different gfns + by KSM. + +Then, we can ensure the dirty bitmaps is correctly set for a gfn. + +Currently, to simplify the whole things, we disable fast page fault for +indirect shadow page. + +2) Dirty bit tracking + +In the origin code, the spte can be fast updated (non-atomically) if the +spte is read-only and the Accessed bit has already been set since the +Accessed bit and Dirty bit can not be lost. + +But it is not true after fast page fault since the spte can be marked +writable between reading spte and updating spte. Like below case: + ++------------------------------------------------------------------------+ +| At the beginning:: | +| | +| spte.W = 0 | +| spte.Accessed = 1 | ++------------------------------------+-----------------------------------+ +| CPU 0: | CPU 1: | ++------------------------------------+-----------------------------------+ +| In mmu_spte_clear_track_bits():: | | +| | | +| old_spte = *spte; | | +| | | +| | | +| /* 'if' condition is satisfied. */| | +| if (old_spte.Accessed == 1 && | | +| old_spte.W == 0) | | +| spte = 0ull; | | ++------------------------------------+-----------------------------------+ +| | on fast page fault path:: | +| | | +| | spte.W = 1 | +| | | +| | memory write on the spte:: | +| | | +| | spte.Dirty = 1 | ++------------------------------------+-----------------------------------+ +| :: | | +| | | +| else | | +| old_spte = xchg(spte, 0ull) | | +| if (old_spte.Accessed == 1) | | +| kvm_set_pfn_accessed(spte.pfn);| | +| if (old_spte.Dirty == 1) | | +| kvm_set_pfn_dirty(spte.pfn); | | +| OOPS!!! | | ++------------------------------------+-----------------------------------+ + +The Dirty bit is lost in this case. + +In order to avoid this kind of issue, we always treat the spte as "volatile" +if it can be updated out of mmu-lock, see spte_has_volatile_bits(), it means, +the spte is always atomically updated in this case. + +3) flush tlbs due to spte updated + +If the spte is updated from writable to readonly, we should flush all TLBs, +otherwise rmap_write_protect will find a read-only spte, even though the +writable spte might be cached on a CPU's TLB. + +As mentioned before, the spte can be updated to writable out of mmu-lock on +fast page fault path, in order to easily audit the path, we see if TLBs need +be flushed caused by this reason in mmu_spte_update() since this is a common +function to update spte (present -> present). + +Since the spte is "volatile" if it can be updated out of mmu-lock, we always +atomically update the spte, the race caused by fast page fault can be avoided, +See the comments in spte_has_volatile_bits() and mmu_spte_update(). + +Lockless Access Tracking: + +This is used for Intel CPUs that are using EPT but do not support the EPT A/D +bits. In this case, when the KVM MMU notifier is called to track accesses to a +page (via kvm_mmu_notifier_clear_flush_young), it marks the PTE as not-present +by clearing the RWX bits in the PTE and storing the original R & X bits in +some unused/ignored bits. In addition, the SPTE_SPECIAL_MASK is also set on the +PTE (using the ignored bit 62). When the VM tries to access the page later on, +a fault is generated and the fast page fault mechanism described above is used +to atomically restore the PTE to a Present state. The W bit is not saved when +the PTE is marked for access tracking and during restoration to the Present +state, the W bit is set depending on whether or not it was a write access. If +it wasn't, then the W bit will remain clear until a write access happens, at +which time it will be set using the Dirty tracking mechanism described above. + +3. Reference +------------ + +:Name: kvm_lock +:Type: mutex +:Arch: any +:Protects: - vm_list + +:Name: kvm_count_lock +:Type: raw_spinlock_t +:Arch: any +:Protects: - hardware virtualization enable/disable +:Comment: 'raw' because hardware enabling/disabling must be atomic /wrt + migration. + +:Name: kvm_arch::tsc_write_lock +:Type: raw_spinlock +:Arch: x86 +:Protects: - kvm_arch::{last_tsc_write,last_tsc_nsec,last_tsc_offset} + - tsc offset in vmcb +:Comment: 'raw' because updating the tsc offsets must not be preempted. + +:Name: kvm->mmu_lock +:Type: spinlock_t +:Arch: any +:Protects: -shadow page/shadow tlb entry +:Comment: it is a spinlock since it is used in mmu notifier. + +:Name: kvm->srcu +:Type: srcu lock +:Arch: any +:Protects: - kvm->memslots + - kvm->buses +:Comment: The srcu read lock must be held while accessing memslots (e.g. + when using gfn_to_* functions) and while accessing in-kernel + MMIO/PIO address->device structure mapping (kvm->buses). + The srcu index can be stored in kvm_vcpu->srcu_idx per vcpu + if it is needed by multiple functions. + +:Name: blocked_vcpu_on_cpu_lock +:Type: spinlock_t +:Arch: x86 +:Protects: blocked_vcpu_on_cpu +:Comment: This is a per-CPU lock and it is used for VT-d posted-interrupts. + When VT-d posted-interrupts is supported and the VM has assigned + devices, we put the blocked vCPU on the list blocked_vcpu_on_cpu + protected by blocked_vcpu_on_cpu_lock, when VT-d hardware issues + wakeup notification event since external interrupts from the + assigned devices happens, we will find the vCPU on the list to + wakeup. diff --git a/Documentation/virt/kvm/locking.txt b/Documentation/virt/kvm/locking.txt deleted file mode 100644 index 635cd6eaf714..000000000000 --- a/Documentation/virt/kvm/locking.txt +++ /dev/null @@ -1,215 +0,0 @@ -KVM Lock Overview -================= - -1. Acquisition Orders ---------------------- - -The acquisition orders for mutexes are as follows: - -- kvm->lock is taken outside vcpu->mutex - -- kvm->lock is taken outside kvm->slots_lock and kvm->irq_lock - -- kvm->slots_lock is taken outside kvm->irq_lock, though acquiring - them together is quite rare. - -On x86, vcpu->mutex is taken outside kvm->arch.hyperv.hv_lock. - -Everything else is a leaf: no other lock is taken inside the critical -sections. - -2: Exception ------------- - -Fast page fault: - -Fast page fault is the fast path which fixes the guest page fault out of -the mmu-lock on x86. Currently, the page fault can be fast in one of the -following two cases: - -1. Access Tracking: The SPTE is not present, but it is marked for access -tracking i.e. the SPTE_SPECIAL_MASK is set. That means we need to -restore the saved R/X bits. This is described in more detail later below. - -2. Write-Protection: The SPTE is present and the fault is -caused by write-protect. That means we just need to change the W bit of the -spte. - -What we use to avoid all the race is the SPTE_HOST_WRITEABLE bit and -SPTE_MMU_WRITEABLE bit on the spte: -- SPTE_HOST_WRITEABLE means the gfn is writable on host. -- SPTE_MMU_WRITEABLE means the gfn is writable on mmu. The bit is set when - the gfn is writable on guest mmu and it is not write-protected by shadow - page write-protection. - -On fast page fault path, we will use cmpxchg to atomically set the spte W -bit if spte.SPTE_HOST_WRITEABLE = 1 and spte.SPTE_WRITE_PROTECT = 1, or -restore the saved R/X bits if VMX_EPT_TRACK_ACCESS mask is set, or both. This -is safe because whenever changing these bits can be detected by cmpxchg. - -But we need carefully check these cases: -1): The mapping from gfn to pfn -The mapping from gfn to pfn may be changed since we can only ensure the pfn -is not changed during cmpxchg. This is a ABA problem, for example, below case -will happen: - -At the beginning: -gpte = gfn1 -gfn1 is mapped to pfn1 on host -spte is the shadow page table entry corresponding with gpte and -spte = pfn1 - - VCPU 0 VCPU0 -on fast page fault path: - - old_spte = *spte; - pfn1 is swapped out: - spte = 0; - - pfn1 is re-alloced for gfn2. - - gpte is changed to point to - gfn2 by the guest: - spte = pfn1; - - if (cmpxchg(spte, old_spte, old_spte+W) - mark_page_dirty(vcpu->kvm, gfn1) - OOPS!!! - -We dirty-log for gfn1, that means gfn2 is lost in dirty-bitmap. - -For direct sp, we can easily avoid it since the spte of direct sp is fixed -to gfn. For indirect sp, before we do cmpxchg, we call gfn_to_pfn_atomic() -to pin gfn to pfn, because after gfn_to_pfn_atomic(): -- We have held the refcount of pfn that means the pfn can not be freed and - be reused for another gfn. -- The pfn is writable that means it can not be shared between different gfns - by KSM. - -Then, we can ensure the dirty bitmaps is correctly set for a gfn. - -Currently, to simplify the whole things, we disable fast page fault for -indirect shadow page. - -2): Dirty bit tracking -In the origin code, the spte can be fast updated (non-atomically) if the -spte is read-only and the Accessed bit has already been set since the -Accessed bit and Dirty bit can not be lost. - -But it is not true after fast page fault since the spte can be marked -writable between reading spte and updating spte. Like below case: - -At the beginning: -spte.W = 0 -spte.Accessed = 1 - - VCPU 0 VCPU0 -In mmu_spte_clear_track_bits(): - - old_spte = *spte; - - /* 'if' condition is satisfied. */ - if (old_spte.Accessed == 1 && - old_spte.W == 0) - spte = 0ull; - on fast page fault path: - spte.W = 1 - memory write on the spte: - spte.Dirty = 1 - - - else - old_spte = xchg(spte, 0ull) - - - if (old_spte.Accessed == 1) - kvm_set_pfn_accessed(spte.pfn); - if (old_spte.Dirty == 1) - kvm_set_pfn_dirty(spte.pfn); - OOPS!!! - -The Dirty bit is lost in this case. - -In order to avoid this kind of issue, we always treat the spte as "volatile" -if it can be updated out of mmu-lock, see spte_has_volatile_bits(), it means, -the spte is always atomically updated in this case. - -3): flush tlbs due to spte updated -If the spte is updated from writable to readonly, we should flush all TLBs, -otherwise rmap_write_protect will find a read-only spte, even though the -writable spte might be cached on a CPU's TLB. - -As mentioned before, the spte can be updated to writable out of mmu-lock on -fast page fault path, in order to easily audit the path, we see if TLBs need -be flushed caused by this reason in mmu_spte_update() since this is a common -function to update spte (present -> present). - -Since the spte is "volatile" if it can be updated out of mmu-lock, we always -atomically update the spte, the race caused by fast page fault can be avoided, -See the comments in spte_has_volatile_bits() and mmu_spte_update(). - -Lockless Access Tracking: - -This is used for Intel CPUs that are using EPT but do not support the EPT A/D -bits. In this case, when the KVM MMU notifier is called to track accesses to a -page (via kvm_mmu_notifier_clear_flush_young), it marks the PTE as not-present -by clearing the RWX bits in the PTE and storing the original R & X bits in -some unused/ignored bits. In addition, the SPTE_SPECIAL_MASK is also set on the -PTE (using the ignored bit 62). When the VM tries to access the page later on, -a fault is generated and the fast page fault mechanism described above is used -to atomically restore the PTE to a Present state. The W bit is not saved when -the PTE is marked for access tracking and during restoration to the Present -state, the W bit is set depending on whether or not it was a write access. If -it wasn't, then the W bit will remain clear until a write access happens, at -which time it will be set using the Dirty tracking mechanism described above. - -3. Reference ------------- - -Name: kvm_lock -Type: mutex -Arch: any -Protects: - vm_list - -Name: kvm_count_lock -Type: raw_spinlock_t -Arch: any -Protects: - hardware virtualization enable/disable -Comment: 'raw' because hardware enabling/disabling must be atomic /wrt - migration. - -Name: kvm_arch::tsc_write_lock -Type: raw_spinlock -Arch: x86 -Protects: - kvm_arch::{last_tsc_write,last_tsc_nsec,last_tsc_offset} - - tsc offset in vmcb -Comment: 'raw' because updating the tsc offsets must not be preempted. - -Name: kvm->mmu_lock -Type: spinlock_t -Arch: any -Protects: -shadow page/shadow tlb entry -Comment: it is a spinlock since it is used in mmu notifier. - -Name: kvm->srcu -Type: srcu lock -Arch: any -Protects: - kvm->memslots - - kvm->buses -Comment: The srcu read lock must be held while accessing memslots (e.g. - when using gfn_to_* functions) and while accessing in-kernel - MMIO/PIO address->device structure mapping (kvm->buses). - The srcu index can be stored in kvm_vcpu->srcu_idx per vcpu - if it is needed by multiple functions. - -Name: blocked_vcpu_on_cpu_lock -Type: spinlock_t -Arch: x86 -Protects: blocked_vcpu_on_cpu -Comment: This is a per-CPU lock and it is used for VT-d posted-interrupts. - When VT-d posted-interrupts is supported and the VM has assigned - devices, we put the blocked vCPU on the list blocked_vcpu_on_cpu - protected by blocked_vcpu_on_cpu_lock, when VT-d hardware issues - wakeup notification event since external interrupts from the - assigned devices happens, we will find the vCPU on the list to - wakeup. diff --git a/Documentation/virt/kvm/mmu.txt b/Documentation/virt/kvm/mmu.rst index dadb29e8738f..60981887d20b 100644 --- a/Documentation/virt/kvm/mmu.txt +++ b/Documentation/virt/kvm/mmu.rst @@ -1,3 +1,6 @@ +.. SPDX-License-Identifier: GPL-2.0 + +====================== The x86 kvm shadow mmu ====================== @@ -7,27 +10,37 @@ physical addresses to host physical addresses. The mmu code attempts to satisfy the following requirements: -- correctness: the guest should not be able to determine that it is running +- correctness: + the guest should not be able to determine that it is running on an emulated mmu except for timing (we attempt to comply with the specification, not emulate the characteristics of a particular implementation such as tlb size) -- security: the guest must not be able to touch host memory not assigned +- security: + the guest must not be able to touch host memory not assigned to it -- performance: minimize the performance penalty imposed by the mmu -- scaling: need to scale to large memory and large vcpu guests -- hardware: support the full range of x86 virtualization hardware -- integration: Linux memory management code must be in control of guest memory +- performance: + minimize the performance penalty imposed by the mmu +- scaling: + need to scale to large memory and large vcpu guests +- hardware: + support the full range of x86 virtualization hardware +- integration: + Linux memory management code must be in control of guest memory so that swapping, page migration, page merging, transparent hugepages, and similar features work without change -- dirty tracking: report writes to guest memory to enable live migration +- dirty tracking: + report writes to guest memory to enable live migration and framebuffer-based displays -- footprint: keep the amount of pinned kernel memory low (most memory +- footprint: + keep the amount of pinned kernel memory low (most memory should be shrinkable) -- reliability: avoid multipage or GFP_ATOMIC allocations +- reliability: + avoid multipage or GFP_ATOMIC allocations Acronyms ======== +==== ==================================================================== pfn host page frame number hpa host physical address hva host virtual address @@ -41,6 +54,7 @@ pte page table entry (used also to refer generically to paging structure gpte guest pte (referring to gfns) spte shadow pte (referring to pfns) tdp two dimensional paging (vendor neutral term for NPT and EPT) +==== ==================================================================== Virtual and real hardware supported =================================== @@ -90,11 +104,13 @@ Events The mmu is driven by events, some from the guest, some from the host. Guest generated events: + - writes to control registers (especially cr3) - invlpg/invlpga instruction execution - access to missing or protected translations Host generated events: + - changes in the gpa->hpa translation (either through gpa->hva changes or through hva->hpa changes) - memory pressure (the shrinker) @@ -117,16 +133,19 @@ Leaf ptes point at guest pages. The following table shows translations encoded by leaf ptes, with higher-level translations in parentheses: - Non-nested guests: + Non-nested guests:: + nonpaging: gpa->hpa paging: gva->gpa->hpa paging, tdp: (gva->)gpa->hpa - Nested guests: + + Nested guests:: + non-tdp: ngva->gpa->hpa (*) tdp: (ngva->)ngpa->gpa->hpa -(*) the guest hypervisor will encode the ngva->gpa translation into its page - tables if npt is not present + (*) the guest hypervisor will encode the ngva->gpa translation into its page + tables if npt is not present Shadow pages contain the following information: role.level: @@ -291,28 +310,41 @@ Handling a page fault is performed as follows: - if the RSV bit of the error code is set, the page fault is caused by guest accessing MMIO and cached MMIO information is available. + - walk shadow page table - check for valid generation number in the spte (see "Fast invalidation of MMIO sptes" below) - cache the information to vcpu->arch.mmio_gva, vcpu->arch.mmio_access and vcpu->arch.mmio_gfn, and call the emulator + - If both P bit and R/W bit of error code are set, this could possibly be handled as a "fast page fault" (fixed without taking the MMU lock). See the description in Documentation/virt/kvm/locking.txt. + - if needed, walk the guest page tables to determine the guest translation (gva->gpa or ngpa->gpa) + - if permissions are insufficient, reflect the fault back to the guest + - determine the host page + - if this is an mmio request, there is no host page; cache the info to vcpu->arch.mmio_gva, vcpu->arch.mmio_access and vcpu->arch.mmio_gfn + - walk the shadow page table to find the spte for the translation, instantiating missing intermediate page tables as necessary + - If this is an mmio request, cache the mmio info to the spte and set some reserved bit on the spte (see callers of kvm_mmu_set_mmio_spte_mask) + - try to unsynchronize the page + - if successful, we can let the guest continue and modify the gpte + - emulate the instruction + - if failed, unshadow the page and let the guest continue + - update any translations that were modified by the instruction invlpg handling: @@ -324,10 +356,12 @@ invlpg handling: Guest control register updates: - mov to cr3 + - look up new shadow roots - synchronize newly reachable shadow pages - mov to cr0/cr4/efer + - set up mmu context for new paging mode - look up new shadow roots - synchronize newly reachable shadow pages @@ -358,6 +392,7 @@ on fault type: (user write faults generate a #PF) In the first case there are two additional complications: + - if CR4.SMEP is enabled: since we've turned the page into a kernel page, the kernel may now execute it. We handle this by also setting spte.nx. If we get a user fetch or read fault, we'll change spte.u=1 and @@ -446,4 +481,3 @@ Further reading - NPT presentation from KVM Forum 2008 http://www.linux-kvm.org/images/c/c8/KvmForum2008%24kdf2008_21.pdf - diff --git a/Documentation/virt/kvm/msr.txt b/Documentation/virt/kvm/msr.rst index df1f4338b3ca..33892036672d 100644 --- a/Documentation/virt/kvm/msr.txt +++ b/Documentation/virt/kvm/msr.rst @@ -1,6 +1,10 @@ -KVM-specific MSRs. -Glauber Costa <glommer@redhat.com>, Red Hat Inc, 2010 -===================================================== +.. SPDX-License-Identifier: GPL-2.0 + +================= +KVM-specific MSRs +================= + +:Author: Glauber Costa <glommer@redhat.com>, Red Hat Inc, 2010 KVM makes use of some custom MSRs to service some requests. @@ -9,34 +13,39 @@ Custom MSRs have a range reserved for them, that goes from but they are deprecated and their use is discouraged. Custom MSR list --------- +--------------- The current supported Custom MSR list is: -MSR_KVM_WALL_CLOCK_NEW: 0x4b564d00 +MSR_KVM_WALL_CLOCK_NEW: + 0x4b564d00 - data: 4-byte alignment physical address of a memory area which must be +data: + 4-byte alignment physical address of a memory area which must be in guest RAM. This memory is expected to hold a copy of the following - structure: + structure:: - struct pvclock_wall_clock { + struct pvclock_wall_clock { u32 version; u32 sec; u32 nsec; - } __attribute__((__packed__)); + } __attribute__((__packed__)); whose data will be filled in by the hypervisor. The hypervisor is only guaranteed to update this data at the moment of MSR write. Users that want to reliably query this information more than once have to write more than once to this MSR. Fields have the following meanings: - version: guest has to check version before and after grabbing + version: + guest has to check version before and after grabbing time information and check that they are both equal and even. An odd version indicates an in-progress update. - sec: number of seconds for wallclock at time of boot. + sec: + number of seconds for wallclock at time of boot. - nsec: number of nanoseconds for wallclock at time of boot. + nsec: + number of nanoseconds for wallclock at time of boot. In order to get the current wallclock time, the system_time from MSR_KVM_SYSTEM_TIME_NEW needs to be added. @@ -47,13 +56,15 @@ MSR_KVM_WALL_CLOCK_NEW: 0x4b564d00 Availability of this MSR must be checked via bit 3 in 0x4000001 cpuid leaf prior to usage. -MSR_KVM_SYSTEM_TIME_NEW: 0x4b564d01 +MSR_KVM_SYSTEM_TIME_NEW: + 0x4b564d01 - data: 4-byte aligned physical address of a memory area which must be in +data: + 4-byte aligned physical address of a memory area which must be in guest RAM, plus an enable bit in bit 0. This memory is expected to hold - a copy of the following structure: + a copy of the following structure:: - struct pvclock_vcpu_time_info { + struct pvclock_vcpu_time_info { u32 version; u32 pad0; u64 tsc_timestamp; @@ -62,7 +73,7 @@ MSR_KVM_SYSTEM_TIME_NEW: 0x4b564d01 s8 tsc_shift; u8 flags; u8 pad[2]; - } __attribute__((__packed__)); /* 32 bytes */ + } __attribute__((__packed__)); /* 32 bytes */ whose data will be filled in by the hypervisor periodically. Only one write, or registration, is needed for each VCPU. The interval between @@ -72,23 +83,28 @@ MSR_KVM_SYSTEM_TIME_NEW: 0x4b564d01 Fields have the following meanings: - version: guest has to check version before and after grabbing + version: + guest has to check version before and after grabbing time information and check that they are both equal and even. An odd version indicates an in-progress update. - tsc_timestamp: the tsc value at the current VCPU at the time + tsc_timestamp: + the tsc value at the current VCPU at the time of the update of this structure. Guests can subtract this value from current tsc to derive a notion of elapsed time since the structure update. - system_time: a host notion of monotonic time, including sleep + system_time: + a host notion of monotonic time, including sleep time at the time this structure was last updated. Unit is nanoseconds. - tsc_to_system_mul: multiplier to be used when converting + tsc_to_system_mul: + multiplier to be used when converting tsc-related quantity to nanoseconds - tsc_shift: shift to be used when converting tsc-related + tsc_shift: + shift to be used when converting tsc-related quantity to nanoseconds. This shift will ensure that multiplication with tsc_to_system_mul does not overflow. A positive value denotes a left shift, a negative value @@ -96,7 +112,7 @@ MSR_KVM_SYSTEM_TIME_NEW: 0x4b564d01 The conversion from tsc to nanoseconds involves an additional right shift by 32 bits. With this information, guests can - derive per-CPU time by doing: + derive per-CPU time by doing:: time = (current_tsc - tsc_timestamp) if (tsc_shift >= 0) @@ -106,29 +122,34 @@ MSR_KVM_SYSTEM_TIME_NEW: 0x4b564d01 time = (time * tsc_to_system_mul) >> 32 time = time + system_time - flags: bits in this field indicate extended capabilities + flags: + bits in this field indicate extended capabilities coordinated between the guest and the hypervisor. Availability of specific flags has to be checked in 0x40000001 cpuid leaf. Current flags are: - flag bit | cpuid bit | meaning - ------------------------------------------------------------- - | | time measures taken across - 0 | 24 | multiple cpus are guaranteed to - | | be monotonic - ------------------------------------------------------------- - | | guest vcpu has been paused by - 1 | N/A | the host - | | See 4.70 in api.txt - ------------------------------------------------------------- + + +-----------+--------------+----------------------------------+ + | flag bit | cpuid bit | meaning | + +-----------+--------------+----------------------------------+ + | | | time measures taken across | + | 0 | 24 | multiple cpus are guaranteed to | + | | | be monotonic | + +-----------+--------------+----------------------------------+ + | | | guest vcpu has been paused by | + | 1 | N/A | the host | + | | | See 4.70 in api.txt | + +-----------+--------------+----------------------------------+ Availability of this MSR must be checked via bit 3 in 0x4000001 cpuid leaf prior to usage. -MSR_KVM_WALL_CLOCK: 0x11 +MSR_KVM_WALL_CLOCK: + 0x11 - data and functioning: same as MSR_KVM_WALL_CLOCK_NEW. Use that instead. +data and functioning: + same as MSR_KVM_WALL_CLOCK_NEW. Use that instead. This MSR falls outside the reserved KVM range and may be removed in the future. Its usage is deprecated. @@ -136,9 +157,11 @@ MSR_KVM_WALL_CLOCK: 0x11 Availability of this MSR must be checked via bit 0 in 0x4000001 cpuid leaf prior to usage. -MSR_KVM_SYSTEM_TIME: 0x12 +MSR_KVM_SYSTEM_TIME: + 0x12 - data and functioning: same as MSR_KVM_SYSTEM_TIME_NEW. Use that instead. +data and functioning: + same as MSR_KVM_SYSTEM_TIME_NEW. Use that instead. This MSR falls outside the reserved KVM range and may be removed in the future. Its usage is deprecated. @@ -146,7 +169,7 @@ MSR_KVM_SYSTEM_TIME: 0x12 Availability of this MSR must be checked via bit 0 in 0x4000001 cpuid leaf prior to usage. - The suggested algorithm for detecting kvmclock presence is then: + The suggested algorithm for detecting kvmclock presence is then:: if (!kvm_para_available()) /* refer to cpuid.txt */ return NON_PRESENT; @@ -163,8 +186,11 @@ MSR_KVM_SYSTEM_TIME: 0x12 } else return NON_PRESENT; -MSR_KVM_ASYNC_PF_EN: 0x4b564d02 - data: Bits 63-6 hold 64-byte aligned physical address of a +MSR_KVM_ASYNC_PF_EN: + 0x4b564d02 + +data: + Bits 63-6 hold 64-byte aligned physical address of a 64 byte memory area which must be in guest RAM and must be zeroed. Bits 5-3 are reserved and should be zero. Bit 0 is 1 when asynchronous page faults are enabled on the vcpu 0 when @@ -200,20 +226,22 @@ MSR_KVM_ASYNC_PF_EN: 0x4b564d02 Currently type 2 APF will be always delivered on the same vcpu as type 1 was, but guest should not rely on that. -MSR_KVM_STEAL_TIME: 0x4b564d03 +MSR_KVM_STEAL_TIME: + 0x4b564d03 - data: 64-byte alignment physical address of a memory area which must be +data: + 64-byte alignment physical address of a memory area which must be in guest RAM, plus an enable bit in bit 0. This memory is expected to - hold a copy of the following structure: + hold a copy of the following structure:: - struct kvm_steal_time { + struct kvm_steal_time { __u64 steal; __u32 version; __u32 flags; __u8 preempted; __u8 u8_pad[3]; __u32 pad[11]; - } + } whose data will be filled in by the hypervisor periodically. Only one write, or registration, is needed for each VCPU. The interval between @@ -224,25 +252,32 @@ MSR_KVM_STEAL_TIME: 0x4b564d03 Fields have the following meanings: - version: a sequence counter. In other words, guest has to check + version: + a sequence counter. In other words, guest has to check this field before and after grabbing time information and make sure they are both equal and even. An odd version indicates an in-progress update. - flags: At this point, always zero. May be used to indicate + flags: + At this point, always zero. May be used to indicate changes in this structure in the future. - steal: the amount of time in which this vCPU did not run, in + steal: + the amount of time in which this vCPU did not run, in nanoseconds. Time during which the vcpu is idle, will not be reported as steal time. - preempted: indicate the vCPU who owns this struct is running or + preempted: + indicate the vCPU who owns this struct is running or not. Non-zero values mean the vCPU has been preempted. Zero means the vCPU is not preempted. NOTE, it is always zero if the the hypervisor doesn't support this field. -MSR_KVM_EOI_EN: 0x4b564d04 - data: Bit 0 is 1 when PV end of interrupt is enabled on the vcpu; 0 +MSR_KVM_EOI_EN: + 0x4b564d04 + +data: + Bit 0 is 1 when PV end of interrupt is enabled on the vcpu; 0 when disabled. Bit 1 is reserved and must be zero. When PV end of interrupt is enabled (bit 0 set), bits 63-2 hold a 4-byte aligned physical address of a 4 byte memory area which must be in guest RAM and @@ -274,11 +309,13 @@ MSR_KVM_EOI_EN: 0x4b564d04 clear it using a single CPU instruction, such as test and clear, or compare and exchange. -MSR_KVM_POLL_CONTROL: 0x4b564d05 +MSR_KVM_POLL_CONTROL: + 0x4b564d05 + Control host-side polling. - data: Bit 0 enables (1) or disables (0) host-side HLT polling logic. +data: + Bit 0 enables (1) or disables (0) host-side HLT polling logic. KVM guests can request the host not to poll on HLT, for example if they are performing polling themselves. - diff --git a/Documentation/virt/kvm/nested-vmx.txt b/Documentation/virt/kvm/nested-vmx.rst index 97eb1353e962..592b0ab6970b 100644 --- a/Documentation/virt/kvm/nested-vmx.txt +++ b/Documentation/virt/kvm/nested-vmx.rst @@ -1,3 +1,6 @@ +.. SPDX-License-Identifier: GPL-2.0 + +========== Nested VMX ========== @@ -41,9 +44,9 @@ No modifications are required to user space (qemu). However, qemu's default emulated CPU type (qemu64) does not list the "VMX" CPU feature, so it must be explicitly enabled, by giving qemu one of the following options: - -cpu host (emulated CPU has all features of the real CPU) + - cpu host (emulated CPU has all features of the real CPU) - -cpu qemu64,+vmx (add just the vmx feature to a named CPU type) + - cpu qemu64,+vmx (add just the vmx feature to a named CPU type) ABIs @@ -75,6 +78,8 @@ of this structure changes, this can break live migration across KVM versions. VMCS12_REVISION (from vmx.c) should be changed if struct vmcs12 or its inner struct shadow_vmcs is ever changed. +:: + typedef u64 natural_width; struct __packed vmcs12 { /* According to the Intel spec, a VMCS region must start with @@ -220,21 +225,21 @@ Authors ------- These patches were written by: - Abel Gordon, abelg <at> il.ibm.com - Nadav Har'El, nyh <at> il.ibm.com - Orit Wasserman, oritw <at> il.ibm.com - Ben-Ami Yassor, benami <at> il.ibm.com - Muli Ben-Yehuda, muli <at> il.ibm.com + - Abel Gordon, abelg <at> il.ibm.com + - Nadav Har'El, nyh <at> il.ibm.com + - Orit Wasserman, oritw <at> il.ibm.com + - Ben-Ami Yassor, benami <at> il.ibm.com + - Muli Ben-Yehuda, muli <at> il.ibm.com With contributions by: - Anthony Liguori, aliguori <at> us.ibm.com - Mike Day, mdday <at> us.ibm.com - Michael Factor, factor <at> il.ibm.com - Zvi Dubitzky, dubi <at> il.ibm.com + - Anthony Liguori, aliguori <at> us.ibm.com + - Mike Day, mdday <at> us.ibm.com + - Michael Factor, factor <at> il.ibm.com + - Zvi Dubitzky, dubi <at> il.ibm.com And valuable reviews by: - Avi Kivity, avi <at> redhat.com - Gleb Natapov, gleb <at> redhat.com - Marcelo Tosatti, mtosatti <at> redhat.com - Kevin Tian, kevin.tian <at> intel.com - and others. + - Avi Kivity, avi <at> redhat.com + - Gleb Natapov, gleb <at> redhat.com + - Marcelo Tosatti, mtosatti <at> redhat.com + - Kevin Tian, kevin.tian <at> intel.com + - and others. diff --git a/Documentation/virt/kvm/ppc-pv.txt b/Documentation/virt/kvm/ppc-pv.rst index e26115ce4258..5fdb907670be 100644 --- a/Documentation/virt/kvm/ppc-pv.txt +++ b/Documentation/virt/kvm/ppc-pv.rst @@ -1,3 +1,6 @@ +.. SPDX-License-Identifier: GPL-2.0 + +================================= The PPC KVM paravirtual interface ================================= @@ -34,8 +37,9 @@ up the hypercall. To call a hypercall, just call these instructions. The parameters are as follows: + ======== ================ ================ Register IN OUT - + ======== ================ ================ r0 - volatile r3 1st parameter Return code r4 2nd parameter 1st output value @@ -47,6 +51,7 @@ The parameters are as follows: r10 8th parameter 7th output value r11 hypercall number 8th output value r12 - volatile + ======== ================ ================ Hypercall definitions are shared in generic code, so the same hypercall numbers apply for x86 and powerpc alike with the exception that each KVM hypercall @@ -54,11 +59,13 @@ also needs to be ORed with the KVM vendor code which is (42 << 16). Return codes can be as follows: + ==== ========================= Code Meaning - + ==== ========================= 0 Success 12 Hypercall not implemented <0 Error + ==== ========================= The magic page ============== @@ -72,7 +79,7 @@ desired location. The first parameter indicates the effective address when the MMU is enabled. The second parameter indicates the address in real mode, if applicable to the target. For now, we always map the page to -4096. This way we can access it using absolute load and store functions. The following -instruction reads the first field of the magic page: +instruction reads the first field of the magic page:: ld rX, -4096(0) @@ -93,8 +100,10 @@ a bitmap of available features inside the magic page. The following enhancements to the magic page are currently available: + ============================ ======================================= KVM_MAGIC_FEAT_SR Maps SR registers r/w in the magic page KVM_MAGIC_FEAT_MAS0_TO_SPRG7 Maps MASn, ESR, PIR and high SPRGs + ============================ ======================================= For enhanced features in the magic page, please check for the existence of the feature before using them! @@ -121,8 +130,8 @@ when entering the guest or don't have any impact on the hypervisor's behavior. The following bits are safe to be set inside the guest: - MSR_EE - MSR_RI + - MSR_EE + - MSR_RI If any other bit changes in the MSR, please still use mtmsr(d). @@ -138,9 +147,9 @@ guest. Implementing any of those mappings is optional, as the instruction traps also act on the shared page. So calling privileged instructions still works as before. +======================= ================================ From To -==== == - +======================= ================================ mfmsr rX ld rX, magic_page->msr mfsprg rX, 0 ld rX, magic_page->sprg0 mfsprg rX, 1 ld rX, magic_page->sprg1 @@ -173,7 +182,7 @@ mtsrin rX, rY b <special mtsrin section> [BookE only] wrteei [0|1] b <special wrteei section> - +======================= ================================ Some instructions require more logic to determine what's going on than a load or store instruction can deliver. To enable patching of those, we keep some @@ -191,6 +200,7 @@ for example. Hypercall ABIs in KVM on PowerPC ================================= + 1) KVM hypercalls (ePAPR) These are ePAPR compliant hypercall implementation (mentioned above). Even diff --git a/Documentation/virt/kvm/review-checklist.txt b/Documentation/virt/kvm/review-checklist.rst index 499af499e296..1f86a9d3f705 100644 --- a/Documentation/virt/kvm/review-checklist.txt +++ b/Documentation/virt/kvm/review-checklist.rst @@ -1,3 +1,6 @@ +.. SPDX-License-Identifier: GPL-2.0 + +================================ Review checklist for kvm patches ================================ diff --git a/Documentation/virt/kvm/s390-diag.txt b/Documentation/virt/kvm/s390-diag.rst index 7c52e5f8b210..eaac4864d3d6 100644 --- a/Documentation/virt/kvm/s390-diag.txt +++ b/Documentation/virt/kvm/s390-diag.rst @@ -1,3 +1,6 @@ +.. SPDX-License-Identifier: GPL-2.0 + +============================= The s390 DIAGNOSE call on KVM ============================= @@ -16,12 +19,12 @@ DIAGNOSE calls by the guest cause a mandatory intercept. This implies all supported DIAGNOSE calls need to be handled by either KVM or its userspace. -All DIAGNOSE calls supported by KVM use the RS-a format: +All DIAGNOSE calls supported by KVM use the RS-a format:: --------------------------------------- -| '83' | R1 | R3 | B2 | D2 | --------------------------------------- -0 8 12 16 20 31 + -------------------------------------- + | '83' | R1 | R3 | B2 | D2 | + -------------------------------------- + 0 8 12 16 20 31 The second-operand address (obtained by the base/displacement calculation) is not used to address data. Instead, bits 48-63 of this address specify diff --git a/Documentation/virt/kvm/timekeeping.txt b/Documentation/virt/kvm/timekeeping.rst index 76808a17ad84..21ae7efa29ba 100644 --- a/Documentation/virt/kvm/timekeeping.txt +++ b/Documentation/virt/kvm/timekeeping.rst @@ -1,17 +1,21 @@ +.. SPDX-License-Identifier: GPL-2.0 - Timekeeping Virtualization for X86-Based Architectures +====================================================== +Timekeeping Virtualization for X86-Based Architectures +====================================================== - Zachary Amsden <zamsden@redhat.com> - Copyright (c) 2010, Red Hat. All rights reserved. +:Author: Zachary Amsden <zamsden@redhat.com> +:Copyright: (c) 2010, Red Hat. All rights reserved. -1) Overview -2) Timing Devices -3) TSC Hardware -4) Virtualization Problems +.. Contents -========================================================================= + 1) Overview + 2) Timing Devices + 3) TSC Hardware + 4) Virtualization Problems -1) Overview +1. Overview +=========== One of the most complicated parts of the X86 platform, and specifically, the virtualization of this platform is the plethora of timing devices available @@ -27,15 +31,15 @@ The purpose of this document is to collect data and information relevant to timekeeping which may be difficult to find elsewhere, specifically, information relevant to KVM and hardware-based virtualization. -========================================================================= - -2) Timing Devices +2. Timing Devices +================= First we discuss the basic hardware devices available. TSC and the related KVM clock are special enough to warrant a full exposition and are described in the following section. -2.1) i8254 - PIT +2.1. i8254 - PIT +---------------- One of the first timer devices available is the programmable interrupt timer, or PIT. The PIT has a fixed frequency 1.193182 MHz base clock and three @@ -50,13 +54,13 @@ The PIT uses I/O ports 0x40 - 0x43. Access to the 16-bit counters is done using single or multiple byte access to the I/O ports. There are 6 modes available, but not all modes are available to all timers, as only timer 2 has a connected gate input, required for modes 1 and 5. The gate line is -controlled by port 61h, bit 0, as illustrated in the following diagram. +controlled by port 61h, bit 0, as illustrated in the following diagram:: - -------------- ---------------- -| | | | -| 1.1932 MHz |---------->| CLOCK OUT | ---------> IRQ 0 -| Clock | | | | - -------------- | +->| GATE TIMER 0 | + -------------- ---------------- + | | | | + | 1.1932 MHz|---------->| CLOCK OUT | ---------> IRQ 0 + | Clock | | | | + -------------- | +->| GATE TIMER 0 | | ---------------- | | ---------------- @@ -70,29 +74,33 @@ controlled by port 61h, bit 0, as illustrated in the following diagram. | | | |------>| CLOCK OUT | ---------> Port 61h, bit 5 | | | -Port 61h, bit 0 ---------->| GATE TIMER 2 | \_.---- ____ + Port 61h, bit 0 -------->| GATE TIMER 2 | \_.---- ____ ---------------- _| )--|LPF|---Speaker / *---- \___/ -Port 61h, bit 1 -----------------------------------/ + Port 61h, bit 1 ---------------------------------/ The timer modes are now described. -Mode 0: Single Timeout. This is a one-shot software timeout that counts down +Mode 0: Single Timeout. + This is a one-shot software timeout that counts down when the gate is high (always true for timers 0 and 1). When the count reaches zero, the output goes high. -Mode 1: Triggered One-shot. The output is initially set high. When the gate +Mode 1: Triggered One-shot. + The output is initially set high. When the gate line is set high, a countdown is initiated (which does not stop if the gate is lowered), during which the output is set low. When the count reaches zero, the output goes high. -Mode 2: Rate Generator. The output is initially set high. When the countdown +Mode 2: Rate Generator. + The output is initially set high. When the countdown reaches 1, the output goes low for one count and then returns high. The value is reloaded and the countdown automatically resumes. If the gate line goes low, the count is halted. If the output is low when the gate is lowered, the output automatically goes high (this only affects timer 2). -Mode 3: Square Wave. This generates a high / low square wave. The count +Mode 3: Square Wave. + This generates a high / low square wave. The count determines the length of the pulse, which alternates between high and low when zero is reached. The count only proceeds when gate is high and is automatically reloaded on reaching zero. The count is decremented twice at @@ -103,12 +111,14 @@ Mode 3: Square Wave. This generates a high / low square wave. The count values are not observed when reading. This is the intended mode for timer 2, which generates sine-like tones by low-pass filtering the square wave output. -Mode 4: Software Strobe. After programming this mode and loading the counter, +Mode 4: Software Strobe. + After programming this mode and loading the counter, the output remains high until the counter reaches zero. Then the output goes low for 1 clock cycle and returns high. The counter is not reloaded. Counting only occurs when gate is high. -Mode 5: Hardware Strobe. After programming and loading the counter, the +Mode 5: Hardware Strobe. + After programming and loading the counter, the output remains high. When the gate is raised, a countdown is initiated (which does not stop if the gate is lowered). When the counter reaches zero, the output goes low for 1 clock cycle and then returns high. The counter is @@ -118,49 +128,49 @@ In addition to normal binary counting, the PIT supports BCD counting. The command port, 0x43 is used to set the counter and mode for each of the three timers. -PIT commands, issued to port 0x43, using the following bit encoding: +PIT commands, issued to port 0x43, using the following bit encoding:: -Bit 7-4: Command (See table below) -Bit 3-1: Mode (000 = Mode 0, 101 = Mode 5, 11X = undefined) -Bit 0 : Binary (0) / BCD (1) + Bit 7-4: Command (See table below) + Bit 3-1: Mode (000 = Mode 0, 101 = Mode 5, 11X = undefined) + Bit 0 : Binary (0) / BCD (1) -Command table: +Command table:: -0000 - Latch Timer 0 count for port 0x40 + 0000 - Latch Timer 0 count for port 0x40 sample and hold the count to be read in port 0x40; additional commands ignored until counter is read; mode bits ignored. -0001 - Set Timer 0 LSB mode for port 0x40 + 0001 - Set Timer 0 LSB mode for port 0x40 set timer to read LSB only and force MSB to zero; mode bits set timer mode -0010 - Set Timer 0 MSB mode for port 0x40 + 0010 - Set Timer 0 MSB mode for port 0x40 set timer to read MSB only and force LSB to zero; mode bits set timer mode -0011 - Set Timer 0 16-bit mode for port 0x40 + 0011 - Set Timer 0 16-bit mode for port 0x40 set timer to read / write LSB first, then MSB; mode bits set timer mode -0100 - Latch Timer 1 count for port 0x41 - as described above -0101 - Set Timer 1 LSB mode for port 0x41 - as described above -0110 - Set Timer 1 MSB mode for port 0x41 - as described above -0111 - Set Timer 1 16-bit mode for port 0x41 - as described above + 0100 - Latch Timer 1 count for port 0x41 - as described above + 0101 - Set Timer 1 LSB mode for port 0x41 - as described above + 0110 - Set Timer 1 MSB mode for port 0x41 - as described above + 0111 - Set Timer 1 16-bit mode for port 0x41 - as described above -1000 - Latch Timer 2 count for port 0x42 - as described above -1001 - Set Timer 2 LSB mode for port 0x42 - as described above -1010 - Set Timer 2 MSB mode for port 0x42 - as described above -1011 - Set Timer 2 16-bit mode for port 0x42 as described above + 1000 - Latch Timer 2 count for port 0x42 - as described above + 1001 - Set Timer 2 LSB mode for port 0x42 - as described above + 1010 - Set Timer 2 MSB mode for port 0x42 - as described above + 1011 - Set Timer 2 16-bit mode for port 0x42 as described above -1101 - General counter latch + 1101 - General counter latch Latch combination of counters into corresponding ports Bit 3 = Counter 2 Bit 2 = Counter 1 Bit 1 = Counter 0 Bit 0 = Unused -1110 - Latch timer status + 1110 - Latch timer status Latch combination of counter mode into corresponding ports Bit 3 = Counter 2 Bit 2 = Counter 1 @@ -177,7 +187,8 @@ Command table: Bit 3-1 = Mode Bit 0 = Binary (0) / BCD mode (1) -2.2) RTC +2.2. RTC +-------- The second device which was available in the original PC was the MC146818 real time clock. The original device is now obsolete, and usually emulated by the @@ -201,21 +212,21 @@ in progress, as indicated in the status register. The clock uses a 32.768kHz crystal, so bits 6-4 of register A should be programmed to a 32kHz divider if the RTC is to count seconds. -This is the RAM map originally used for the RTC/CMOS: - -Location Size Description ------------------------------------------- -00h byte Current second (BCD) -01h byte Seconds alarm (BCD) -02h byte Current minute (BCD) -03h byte Minutes alarm (BCD) -04h byte Current hour (BCD) -05h byte Hours alarm (BCD) -06h byte Current day of week (BCD) -07h byte Current day of month (BCD) -08h byte Current month (BCD) -09h byte Current year (BCD) -0Ah byte Register A +This is the RAM map originally used for the RTC/CMOS:: + + Location Size Description + ------------------------------------------ + 00h byte Current second (BCD) + 01h byte Seconds alarm (BCD) + 02h byte Current minute (BCD) + 03h byte Minutes alarm (BCD) + 04h byte Current hour (BCD) + 05h byte Hours alarm (BCD) + 06h byte Current day of week (BCD) + 07h byte Current day of month (BCD) + 08h byte Current month (BCD) + 09h byte Current year (BCD) + 0Ah byte Register A bit 7 = Update in progress bit 6-4 = Divider for clock 000 = 4.194 MHz @@ -234,7 +245,7 @@ Location Size Description 1101 = 125 mS 1110 = 250 mS 1111 = 500 mS -0Bh byte Register B + 0Bh byte Register B bit 7 = Run (0) / Halt (1) bit 6 = Periodic interrupt enable bit 5 = Alarm interrupt enable @@ -243,19 +254,20 @@ Location Size Description bit 2 = BCD calendar (0) / Binary (1) bit 1 = 12-hour mode (0) / 24-hour mode (1) bit 0 = 0 (DST off) / 1 (DST enabled) -OCh byte Register C (read only) + OCh byte Register C (read only) bit 7 = interrupt request flag (IRQF) bit 6 = periodic interrupt flag (PF) bit 5 = alarm interrupt flag (AF) bit 4 = update interrupt flag (UF) bit 3-0 = reserved -ODh byte Register D (read only) + ODh byte Register D (read only) bit 7 = RTC has power bit 6-0 = reserved -32h byte Current century BCD (*) + 32h byte Current century BCD (*) (*) location vendor specific and now determined from ACPI global tables -2.3) APIC +2.3. APIC +--------- On Pentium and later processors, an on-board timer is available to each CPU as part of the Advanced Programmable Interrupt Controller. The APIC is @@ -276,7 +288,8 @@ timer is programmed through the LVT (local vector timer) register, is capable of one-shot or periodic operation, and is based on the bus clock divided down by the programmable divider register. -2.4) HPET +2.4. HPET +--------- HPET is quite complex, and was originally intended to replace the PIT / RTC support of the X86 PC. It remains to be seen whether that will be the case, as @@ -297,7 +310,8 @@ indicated through ACPI tables by the BIOS. Detailed specification of the HPET is beyond the current scope of this document, as it is also very well documented elsewhere. -2.5) Offboard Timers +2.5. Offboard Timers +-------------------- Several cards, both proprietary (watchdog boards) and commonplace (e1000) have timing chips built into the cards which may have registers which are accessible @@ -307,9 +321,8 @@ general frowned upon as not playing by the agreed rules of the game. Such a timer device would require additional support to be virtualized properly and is not considered important at this time as no known operating system does this. -========================================================================= - -3) TSC Hardware +3. TSC Hardware +=============== The TSC or time stamp counter is relatively simple in theory; it counts instruction cycles issued by the processor, which can be used as a measure of @@ -340,7 +353,8 @@ allows the guest visible TSC to be offset by a constant. Newer implementations promise to allow the TSC to additionally be scaled, but this hardware is not yet widely available. -3.1) TSC synchronization +3.1. TSC synchronization +------------------------ The TSC is a CPU-local clock in most implementations. This means, on SMP platforms, the TSCs of different CPUs may start at different times depending @@ -357,7 +371,8 @@ practice, getting a perfectly synchronized TSC will not be possible unless all values are read from the same clock, which generally only is possible on single socket systems or those with special hardware support. -3.2) TSC and CPU hotplug +3.2. TSC and CPU hotplug +------------------------ As touched on already, CPUs which arrive later than the boot time of the system may not have a TSC value that is synchronized with the rest of the system. @@ -367,7 +382,8 @@ a guarantee. This can have the effect of bringing a system from a state where TSC is synchronized back to a state where TSC synchronization flaws, however small, may be exposed to the OS and any virtualization environment. -3.3) TSC and multi-socket / NUMA +3.3. TSC and multi-socket / NUMA +-------------------------------- Multi-socket systems, especially large multi-socket systems are likely to have individual clocksources rather than a single, universally distributed clock. @@ -385,7 +401,8 @@ standards for telecommunications and computer equipment. It is recommended not to trust the TSCs to remain synchronized on NUMA or multiple socket systems for these reasons. -3.4) TSC and C-states +3.4. TSC and C-states +--------------------- C-states, or idling states of the processor, especially C1E and deeper sleep states may be problematic for TSC as well. The TSC may stop advancing in such @@ -396,7 +413,8 @@ based on CPU and chipset identifications. The TSC in such a case may be corrected by catching it up to a known external clocksource. -3.5) TSC frequency change / P-states +3.5. TSC frequency change / P-states +------------------------------------ To make things slightly more interesting, some CPUs may change frequency. They may or may not run the TSC at the same rate, and because the frequency change @@ -416,14 +434,16 @@ other processors. In such cases, the TSC on halted CPUs could advance faster than that of non-halted processors. AMD Turion processors are known to have this problem. -3.6) TSC and STPCLK / T-states +3.6. TSC and STPCLK / T-states +------------------------------ External signals given to the processor may also have the effect of stopping the TSC. This is typically done for thermal emergency power control to prevent an overheating condition, and typically, there is no way to detect that this condition has happened. -3.7) TSC virtualization - VMX +3.7. TSC virtualization - VMX +----------------------------- VMX provides conditional trapping of RDTSC, RDMSR, WRMSR and RDTSCP instructions, which is enough for full virtualization of TSC in any manner. In @@ -431,14 +451,16 @@ addition, VMX allows passing through the host TSC plus an additional TSC_OFFSET field specified in the VMCS. Special instructions must be used to read and write the VMCS field. -3.8) TSC virtualization - SVM +3.8. TSC virtualization - SVM +----------------------------- SVM provides conditional trapping of RDTSC, RDMSR, WRMSR and RDTSCP instructions, which is enough for full virtualization of TSC in any manner. In addition, SVM allows passing through the host TSC plus an additional offset field specified in the SVM control block. -3.9) TSC feature bits in Linux +3.9. TSC feature bits in Linux +------------------------------ In summary, there is no way to guarantee the TSC remains in perfect synchronization unless it is explicitly guaranteed by the architecture. Even @@ -448,13 +470,16 @@ despite being locally consistent. The following feature bits are used by Linux to signal various TSC attributes, but they can only be taken to be meaningful for UP or single node systems. -X86_FEATURE_TSC : The TSC is available in hardware -X86_FEATURE_RDTSCP : The RDTSCP instruction is available -X86_FEATURE_CONSTANT_TSC : The TSC rate is unchanged with P-states -X86_FEATURE_NONSTOP_TSC : The TSC does not stop in C-states -X86_FEATURE_TSC_RELIABLE : TSC sync checks are skipped (VMware) +========================= ======================================= +X86_FEATURE_TSC The TSC is available in hardware +X86_FEATURE_RDTSCP The RDTSCP instruction is available +X86_FEATURE_CONSTANT_TSC The TSC rate is unchanged with P-states +X86_FEATURE_NONSTOP_TSC The TSC does not stop in C-states +X86_FEATURE_TSC_RELIABLE TSC sync checks are skipped (VMware) +========================= ======================================= -4) Virtualization Problems +4. Virtualization Problems +========================== Timekeeping is especially problematic for virtualization because a number of challenges arise. The most obvious problem is that time is now shared between @@ -473,7 +498,8 @@ BIOS, but not in such an extreme fashion. However, the fact that SMM mode may cause similar problems to virtualization makes it a good justification for solving many of these problems on bare metal. -4.1) Interrupt clocking +4.1. Interrupt clocking +----------------------- One of the most immediate problems that occurs with legacy operating systems is that the system timekeeping routines are often designed to keep track of @@ -502,7 +528,8 @@ thus requires interrupt slewing to keep proper time. It does use a low enough rate (ed: is it 18.2 Hz?) however that it has not yet been a problem in practice. -4.2) TSC sampling and serialization +4.2. TSC sampling and serialization +----------------------------------- As the highest precision time source available, the cycle counter of the CPU has aroused much interest from developers. As explained above, this timer has @@ -524,7 +551,8 @@ it may be necessary for an implementation to guard against "backwards" reads of the TSC as seen from other CPUs, even in an otherwise perfectly synchronized system. -4.3) Timespec aliasing +4.3. Timespec aliasing +---------------------- Additionally, this lack of serialization from the TSC poses another challenge when using results of the TSC when measured against another time source. As @@ -548,7 +576,8 @@ This aliasing requires care in the computation and recalibration of kvmclock and any other values derived from TSC computation (such as TSC virtualization itself). -4.4) Migration +4.4. Migration +-------------- Migration of a virtual machine raises problems for timekeeping in two ways. First, the migration itself may take time, during which interrupts cannot be @@ -566,7 +595,8 @@ always be caught up to the original rate. KVM clock avoids these problems by simply storing multipliers and offsets against the TSC for the guest to convert back into nanosecond resolution values. -4.5) Scheduling +4.5. Scheduling +--------------- Since scheduling may be based on precise timing and firing of interrupts, the scheduling algorithms of an operating system may be adversely affected by @@ -579,7 +609,8 @@ In an attempt to work around this, several implementations have provided a paravirtualized scheduler clock, which reveals the true amount of CPU time for which a virtual machine has been running. -4.6) Watchdogs +4.6. Watchdogs +-------------- Watchdog timers, such as the lock detector in Linux may fire accidentally when running under hardware virtualization due to timer interrupts being delayed or @@ -587,7 +618,8 @@ misinterpretation of the passage of real time. Usually, these warnings are spurious and can be ignored, but in some circumstances it may be necessary to disable such detection. -4.7) Delays and precision timing +4.7. Delays and precision timing +-------------------------------- Precise timing and delays may not be possible in a virtualized system. This can happen if the system is controlling physical hardware, or issues delays to @@ -600,7 +632,8 @@ The second issue may cause performance problems, but this is unlikely to be a significant issue. In many cases these delays may be eliminated through configuration or paravirtualization. -4.8) Covert channels and leaks +4.8. Covert channels and leaks +------------------------------ In addition to the above problems, time information will inevitably leak to the guest about the host in anything but a perfect implementation of virtualized diff --git a/Documentation/virt/uml/UserModeLinux-HOWTO.txt b/Documentation/virt/uml/user_mode_linux.rst index 87b80f589e1c..de0f0b2c9d5b 100644 --- a/Documentation/virt/uml/UserModeLinux-HOWTO.txt +++ b/Documentation/virt/uml/user_mode_linux.rst @@ -1,12 +1,17 @@ - User Mode Linux HOWTO - User Mode Linux Core Team - Mon Nov 18 14:16:16 EST 2002 +.. SPDX-License-Identifier: GPL-2.0 - This document describes the use and abuse of Jeff Dike's User Mode - Linux: a port of the Linux kernel as a normal Intel Linux process. - ______________________________________________________________________ +===================== +User Mode Linux HOWTO +===================== - Table of Contents +:Author: User Mode Linux Core Team +:Last-updated: Sat Jan 25 16:07:55 CET 2020 + +This document describes the use and abuse of Jeff Dike's User Mode +Linux: a port of the Linux kernel as a normal Intel Linux process. + + +.. Table of Contents 1. Introduction @@ -132,19 +137,19 @@ 15.5 Other contributions - ______________________________________________________________________ - - 1. Introduction +1. Introduction +================ Welcome to User Mode Linux. It's going to be fun. - 1.1. How is User Mode Linux Different? +1.1. How is User Mode Linux Different? +--------------------------------------- Normally, the Linux Kernel talks straight to your hardware (video card, keyboard, hard drives, etc), and any programs which run ask the - kernel to operate the hardware, like so: + kernel to operate the hardware, like so:: @@ -160,10 +165,10 @@ The User Mode Linux Kernel is different; instead of talking to the - hardware, it talks to a `real' Linux kernel (called the `host kernel' + hardware, it talks to a `real` Linux kernel (called the `host kernel` from now on), like any other program. Programs can then run inside User-Mode Linux as if they were running under a normal kernel, like - so: + so:: @@ -181,7 +186,8 @@ - 1.2. Why Would I Want User Mode Linux? +1.2. Why Would I Want User Mode Linux? +--------------------------------------- 1. If User Mode Linux crashes, your host kernel is still fine. @@ -204,83 +210,41 @@ +.. _Compiling_the_kernel_and_modules: - - 2. Compiling the kernel and modules +2. Compiling the kernel and modules +==================================== - 2.1. Compiling the kernel +2.1. Compiling the kernel +-------------------------- Compiling the user mode kernel is just like compiling any other - kernel. Let's go through the steps, using 2.4.0-prerelease (current - as of this writing) as an example: - - - 1. Download the latest UML patch from - - the download page <http://user-mode-linux.sourceforge.net/ - - In this example, the file is uml-patch-2.4.0-prerelease.bz2. + kernel. - 2. Download the matching kernel from your favourite kernel mirror, + 1. Download the latest kernel from your favourite kernel mirror, such as: - ftp://ftp.ca.kernel.org/pub/kernel/v2.4/linux-2.4.0-prerelease.tar.bz2 - <ftp://ftp.ca.kernel.org/pub/kernel/v2.4/linux-2.4.0-prerelease.tar.bz2> - . - - - 3. Make a directory and unpack the kernel into it. - + https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/linux-5.4.14.tar.xz + 2. Make a directory and unpack the kernel into it:: host% mkdir ~/uml - - - - - host% cd ~/uml - - - - - - host% - tar -xzvf linux-2.4.0-prerelease.tar.bz2 - - - - - - - 4. Apply the patch using - - - - host% - cd ~/uml/linux - - - host% - bzcat uml-patch-2.4.0-prerelease.bz2 | patch -p1 + tar xvf linux-5.4.14.tar.xz - - - - - 5. Run your favorite config; `make xconfig ARCH=um' is the most - convenient. `make config ARCH=um' and 'make menuconfig ARCH=um' + 3. Run your favorite config; ``make xconfig ARCH=um`` is the most + convenient. ``make config ARCH=um`` and ``make menuconfig ARCH=um`` will work as well. The defaults will give you a useful kernel. If you want to change something, go ahead, it probably won't hurt anything. @@ -288,44 +252,20 @@ Note: If the host is configured with a 2G/2G address space split rather than the usual 3G/1G split, then the packaged UML binaries - will not run. They will immediately segfault. See ``UML on 2G/2G - hosts'' for the scoop on running UML on your system. - - - - 6. Finish with `make linux ARCH=um': the result is a file called - `linux' in the top directory of your source tree. - - Make sure that you don't build this kernel in /usr/src/linux. On some - distributions, /usr/include/asm is a link into this pool. The user- - mode build changes the other end of that link, and things that include - <asm/anything.h> stop compiling. - - The sources are also available from cvs at the project's cvs page, - which has directions on getting the sources. You can also browse the - CVS pool from there. + will not run. They will immediately segfault. See + :ref:`UML_on_2G/2G_hosts` for the scoop on running UML on your system. - If you get the CVS sources, you will have to check them out into an - empty directory. You will then have to copy each file into the - corresponding directory in the appropriate kernel pool. - If you don't have the latest kernel pool, you can get the - corresponding user-mode sources with + 4. Finish with ``make linux ARCH=um``: the result is a file called + ``linux`` in the top directory of your source tree. - host% cvs co -r v_2_3_x linux - - - - where 'x' is the version in your pool. Note that you will not get the - bug fixes and enhancements that have gone into subsequent releases. - - - 2.2. Compiling and installing kernel modules +2.2. Compiling and installing kernel modules +--------------------------------------------- UML modules are built in the same way as the native kernel (with the - exception of the 'ARCH=um' that you always need for UML): + exception of the 'ARCH=um' that you always need for UML):: host% make modules ARCH=um @@ -337,12 +277,12 @@ the user-mode pool. Modules from the native kernel won't work. You can install them by using ftp or something to copy them into the - virtual machine and dropping them into /lib/modules/`uname -r`. + virtual machine and dropping them into ``/lib/modules/$(uname -r)``. You can also get the kernel build process to install them as follows: 1. with the kernel not booted, mount the root filesystem in the top - level of the kernel pool: + level of the kernel pool:: host% mount root_fs mnt -o loop @@ -352,7 +292,7 @@ - 2. run + 2. run:: host% @@ -363,7 +303,7 @@ - 3. unmount the filesystem + 3. unmount the filesystem:: host% umount mnt @@ -381,27 +321,28 @@ as modules, especially filesystems and network protocols and filters, so most symbols which need to be exported probably already are. However, if you do find symbols that need exporting, let us - <http://user-mode-linux.sourceforge.net/> know, and + know at http://user-mode-linux.sourceforge.net/, and they'll be "taken care of". - 2.3. Compiling and installing uml_utilities +2.3. Compiling and installing uml_utilities +-------------------------------------------- Many features of the UML kernel require a user-space helper program, so a uml_utilities package is distributed separately from the kernel patch which provides these helpers. Included within this is: - o port-helper - Used by consoles which connect to xterms or ports + - port-helper - Used by consoles which connect to xterms or ports - o tunctl - Configuration tool to create and delete tap devices + - tunctl - Configuration tool to create and delete tap devices - o uml_net - Setuid binary for automatic tap device configuration + - uml_net - Setuid binary for automatic tap device configuration - o uml_switch - User-space virtual switch required for daemon + - uml_switch - User-space virtual switch required for daemon transport - The uml_utilities tree is compiled with: + The uml_utilities tree is compiled with:: host# @@ -423,38 +364,42 @@ - 3. Running UML and logging in +3. Running UML and logging in +============================== - 3.1. Running UML +3.1. Running UML +----------------- - It runs on 2.2.15 or later, and all 2.4 kernels. + It runs on 2.2.15 or later, and all kernel versions since 2.4. Booting UML is straightforward. Simply run 'linux': it will try to - mount the file `root_fs' in the current directory. You do not need to - run it as root. If your root filesystem is not named `root_fs', then - you need to put a `ubd0=root_fs_whatever' switch on the linux command + mount the file ``root_fs`` in the current directory. You do not need to + run it as root. If your root filesystem is not named ``root_fs``, then + you need to put a ``ubd0=root_fs_whatever`` switch on the linux command line. You will need a filesystem to boot UML from. There are a number - available for download from here <http://user-mode- - linux.sourceforge.net/> . There are also several tools - <http://user-mode-linux.sourceforge.net/> which can be + available for download from http://user-mode-linux.sourceforge.net. + There are also several tools at + http://user-mode-linux.sourceforge.net/ which can be used to generate UML-compatible filesystem images from media. The kernel will boot up and present you with a login prompt. - Note: If the host is configured with a 2G/2G address space split +Note: + If the host is configured with a 2G/2G address space split rather than the usual 3G/1G split, then the packaged UML binaries will - not run. They will immediately segfault. See ``UML on 2G/2G hosts'' + not run. They will immediately segfault. See :ref:`UML_on_2G/2G_hosts` for the scoop on running UML on your system. - 3.2. Logging in +3.2. Logging in +---------------- @@ -468,22 +413,22 @@ There are a couple of other ways to log in: - o On a virtual console + - On a virtual console Each virtual console that is configured (i.e. the device exists in /dev and /etc/inittab runs a getty on it) will come up in its own - xterm. If you get tired of the xterms, read ``Setting up serial - lines and consoles'' to see how to attach the consoles to - something else, like host ptys. + xterm. If you get tired of the xterms, read + :ref:`setting_up_serial_lines_and_consoles` to see how to attach + the consoles to something else, like host ptys. - o Over the serial line + - Over the serial line - In the boot output, find a line that looks like: + In the boot output, find a line that looks like:: @@ -493,7 +438,7 @@ Attach your favorite terminal program to the corresponding tty. I.e. - for minicom, the command would be + for minicom, the command would be:: host% minicom -o -p /dev/ttyp1 @@ -503,37 +448,40 @@ - o Over the net + - Over the net If the network is running, then you can telnet to the virtual - machine and log in to it. See ``Setting up the network'' to learn + machine and log in to it. See :ref:`Setting_up_the_network` to learn about setting up a virtual network. When you're done using it, run halt, and the kernel will bring itself down and the process will exit. - 3.3. Examples +3.3. Examples +-------------- Here are some examples of UML in action: - o A login session <http://user-mode-linux.sourceforge.net/login.html> + - A login session http://user-mode-linux.sourceforge.net/old/login.html - o A virtual network <http://user-mode-linux.sourceforge.net/net.html> + - A virtual network http://user-mode-linux.sourceforge.net/old/net.html +.. _UML_on_2G/2G_hosts: +4. UML on 2G/2G hosts +====================== - 4. UML on 2G/2G hosts - - 4.1. Introduction +4.1. Introduction +------------------ Most Linux machines are configured so that the kernel occupies the @@ -546,7 +494,8 @@ - 4.2. The problem +4.2. The problem +----------------- The prebuilt UML binaries on this site will not run on 2G/2G hosts @@ -558,13 +507,14 @@ - 4.3. The solution +4.3. The solution +------------------ The fix for this is to rebuild UML from source after enabling CONFIG_HOST_2G_2G (under 'General Setup'). This will cause UML to load itself in the top .5G of that smaller process address space, - where it will run fine. See ``Compiling the kernel and modules'' if + where it will run fine. See :ref:`Compiling_the_kernel_and_modules` if you need help building UML from source. @@ -573,10 +523,11 @@ +.. _setting_up_serial_lines_and_consoles: - - 5. Setting up serial lines and consoles +5. Setting up serial lines and consoles +======================================== It is possible to attach UML serial lines and consoles to many types @@ -584,22 +535,23 @@ You can attach them to host ptys, ttys, file descriptors, and ports. - This allows you to do things like + This allows you to do things like: - o have a UML console appear on an unused host console, + - have a UML console appear on an unused host console, - o hook two virtual machines together by having one attach to a pty + - hook two virtual machines together by having one attach to a pty and having the other attach to the corresponding tty - o make a virtual machine accessible from the net by attaching a + - make a virtual machine accessible from the net by attaching a console to a port on the host. - The general format of the command line option is device=channel. + The general format of the command line option is ``device=channel``. - 5.1. Specifying the device +5.1. Specifying the device +--------------------------- Devices are specified with "con" or "ssl" (console or serial line, respectively), optionally with a device number if you are talking @@ -613,7 +565,7 @@ A specific device name will override a less general "con=" or "ssl=". So, for example, you can assign a pty to each of the serial lines - except for the first two like this: + except for the first two like this:: ssl=pty ssl0=tty:/dev/tty0 ssl1=tty:/dev/tty1 @@ -626,13 +578,14 @@ - 5.2. Specifying the channel +5.2. Specifying the channel +---------------------------- There are a number of different types of channels to attach a UML device to, each with a different way of specifying exactly what to attach to. - o pseudo-terminals - device=pty pts terminals - device=pts + - pseudo-terminals - device=pty pts terminals - device=pts This will cause UML to allocate a free host pseudo-terminal for the @@ -640,23 +593,23 @@ log. You access it by attaching a terminal program to the corresponding tty: - o screen /dev/pts/n + - screen /dev/pts/n - o screen /dev/ttyxx + - screen /dev/ttyxx - o minicom -o -p /dev/ttyxx - minicom seems not able to handle pts + - minicom -o -p /dev/ttyxx - minicom seems not able to handle pts devices - o kermit - start it up, 'open' the device, then 'connect' + - kermit - start it up, 'open' the device, then 'connect' - o terminals - device=tty:tty device file + - terminals - device=tty:tty device file - This will make UML attach the device to the specified tty (i.e + This will make UML attach the device to the specified tty (i.e:: con1=tty:/dev/tty3 @@ -672,7 +625,7 @@ - o xterms - device=xterm + - xterms - device=xterm UML will run an xterm and the device will be attached to it. @@ -681,12 +634,12 @@ - o Port - device=port:port number + - Port - device=port:port number This will attach the UML devices to the specified host port. Attaching console 1 to the host's port 9000 would be done like - this: + this:: con1=port:9000 @@ -694,7 +647,7 @@ - Attaching all the serial lines to that port would be done similarly: + Attaching all the serial lines to that port would be done similarly:: ssl=port:9000 @@ -702,8 +655,8 @@ - You access these devices by telnetting to that port. Each active tel- - net session gets a different device. If there are more telnets to a + You access these devices by telnetting to that port. Each active + telnet session gets a different device. If there are more telnets to a port than UML devices attached to it, then the extra telnet sessions will block until an existing telnet detaches, or until another device becomes active (i.e. by being activated in /etc/inittab). @@ -725,13 +678,13 @@ - o already-existing file descriptors - device=file descriptor + - already-existing file descriptors - device=file descriptor If you set up a file descriptor on the UML command line, you can attach a UML device to it. This is most commonly used to put the main console back on stdin and stdout after assigning all the other - consoles to something else: + consoles to something else:: con0=fd:0,fd:1 con=pts @@ -743,7 +696,7 @@ - o Nothing - device=null + - Nothing - device=null This allows the device to be opened, in contrast to 'none', but @@ -754,7 +707,7 @@ - o None - device=none + - None - device=none This causes the device to disappear. @@ -762,7 +715,7 @@ You can also specify different input and output channels for a device - by putting a comma between them: + by putting a comma between them:: ssl3=tty:/dev/tty2,xterm @@ -785,14 +738,15 @@ - 5.3. Examples +5.3. Examples +-------------- There are a number of interesting things you can do with this capability. First, this is how you get rid of those bleeding console xterms by - attaching them to host ptys: + attaching them to host ptys:: con=pty con0=fd:0,fd:1 @@ -802,7 +756,7 @@ This will make a UML console take over an unused host virtual console, so that when you switch to it, you will see the UML login prompt - rather than the host login prompt: + rather than the host login prompt:: con1=tty:/dev/tty6 @@ -813,7 +767,7 @@ You can attach two virtual machines together with what amounts to a serial line as follows: - Run one UML with a serial line attached to a pty - + Run one UML with a serial line attached to a pty:: ssl1=pty @@ -825,7 +779,7 @@ that it got /dev/ptyp1). Boot the other UML with a serial line attached to the corresponding - tty - + tty:: ssl1=tty:/dev/ttyp1 @@ -838,7 +792,10 @@ prompt of the other virtual machine. - 6. Setting up the network +.. _setting_up_the_network: + +6. Setting up the network +========================== @@ -858,19 +815,19 @@ There are currently five transport types available for a UML virtual machine to exchange packets with other hosts: - o ethertap + - ethertap - o TUN/TAP + - TUN/TAP - o Multicast + - Multicast - o a switch daemon + - a switch daemon - o slip + - slip - o slirp + - slirp - o pcap + - pcap The TUN/TAP, ethertap, slip, and slirp transports allow a UML instance to exchange packets with the host. They may be directed @@ -893,28 +850,28 @@ With so many host transports, which one should you use? Here's when you should use each one: - o ethertap - if you want access to the host networking and it is + - ethertap - if you want access to the host networking and it is running 2.2 - o TUN/TAP - if you want access to the host networking and it is + - TUN/TAP - if you want access to the host networking and it is running 2.4. Also, the TUN/TAP transport is able to use a preconfigured device, allowing it to avoid using the setuid uml_net helper, which is a security advantage. - o Multicast - if you want a purely virtual network and you don't want + - Multicast - if you want a purely virtual network and you don't want to set up anything but the UML - o a switch daemon - if you want a purely virtual network and you + - a switch daemon - if you want a purely virtual network and you don't mind running the daemon in order to get somewhat better performance - o slip - there is no particular reason to run the slip backend unless + - slip - there is no particular reason to run the slip backend unless ethertap and TUN/TAP are just not available for some reason - o slirp - if you don't have root access on the host to setup + - slirp - if you don't have root access on the host to setup networking, or if you don't want to allocate an IP to your UML - o pcap - not much use for actual network connectivity, but great for + - pcap - not much use for actual network connectivity, but great for monitoring traffic on the host Ethertap is available on 2.4 and works fine. TUN/TAP is preferred @@ -926,7 +883,8 @@ exploit the helper's root privileges. - 6.1. General setup +6.1. General setup +------------------- First, you must have the virtual network enabled in your UML. If are running a prebuilt kernel from this site, everything is already @@ -938,7 +896,7 @@ The next step is to provide a network device to the virtual machine. This is done by describing it on the kernel command line. - The general format is + The general format is:: eth <n> = <transport> , <transport args> @@ -947,7 +905,7 @@ For example, a virtual ethernet device may be attached to a host - ethertap device as follows: + ethertap device as follows:: eth0=ethertap,tap0,fe:fd:0:0:0:1,192.168.0.254 @@ -978,7 +936,7 @@ You can also add devices to a UML and remove them at runtime. See the - ``The Management Console'' page for details. + :ref:`The_Management_Console` page for details. The sections below describe this in more detail. @@ -995,7 +953,8 @@ - 6.2. Userspace daemons +6.2. Userspace daemons +----------------------- You will likely need the setuid helper, or the switch daemon, or both. They are both installed with the RPM and deb, so if you've installed @@ -1011,7 +970,8 @@ - 6.3. Specifying ethernet addresses +6.3. Specifying ethernet addresses +----------------------------------- Below, you will see that the TUN/TAP, ethertap, and daemon interfaces allow you to specify hardware addresses for the virtual ethernet @@ -1023,21 +983,21 @@ sufficient to guarantee a unique hardware address for the device. A couple of exceptions are: - o Another set of virtual ethernet devices are on the same network and + - Another set of virtual ethernet devices are on the same network and they are assigned hardware addresses using a different scheme which may conflict with the UML IP address-based scheme - o You aren't going to use the device for IP networking, so you don't + - You aren't going to use the device for IP networking, so you don't assign the device an IP address If you let the driver provide the hardware address, you should make sure that the device IP address is known before the interface is - brought up. So, inside UML, this will guarantee that: + brought up. So, inside UML, this will guarantee that:: - UML# - ifconfig eth0 192.168.0.250 up + UML# + ifconfig eth0 192.168.0.250 up @@ -1049,13 +1009,14 @@ - 6.4. UML interface setup +6.4. UML interface setup +------------------------- Once the network devices have been described on the command line, you should boot UML and log in. - The first thing to do is bring the interface up: + The first thing to do is bring the interface up:: UML# ifconfig ethn ip-address up @@ -1067,7 +1028,7 @@ To reach the rest of the world, you should set a default route to the - host: + host:: UML# route add default gw host ip @@ -1075,7 +1036,7 @@ - Again, with host ip of 192.168.0.4: + Again, with host ip of 192.168.0.4:: UML# route add default gw 192.168.0.4 @@ -1097,29 +1058,25 @@ Note: If you can't communicate with other hosts on your physical ethernet, it's probably because of a network route that's automatically set up. If you run 'route -n' and see a route that - looks like this: + looks like this:: - Destination Gateway Genmask Flags Metric Ref Use Iface - 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 + Destination Gateway Genmask Flags Metric Ref Use Iface + 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 with a mask that's not 255.255.255.255, then replace it with a route - to your host: + to your host:: UML# route del -net 192.168.0.0 dev eth0 netmask 255.255.255.0 - - - - UML# route add -host 192.168.0.4 dev eth0 @@ -1131,7 +1088,8 @@ - 6.5. Multicast +6.5. Multicast +--------------- The simplest way to set up a virtual network between multiple UMLs is to use the mcast transport. This was written by Harald Welte and is @@ -1142,7 +1100,7 @@ messages when you bring the device up inside UML. - To use it, run two UMLs with + To use it, run two UMLs with:: eth0=mcast @@ -1151,16 +1109,12 @@ on their command lines. Log in, configure the ethernet device in each - machine with different IP addresses: + machine with different IP addresses:: UML1# ifconfig eth0 192.168.0.254 - - - - UML2# ifconfig eth0 192.168.0.253 @@ -1168,7 +1122,7 @@ and they should be able to talk to each other. - The full set of command line options for this transport are + The full set of command line options for this transport are:: @@ -1177,16 +1131,11 @@ - - Harald's original README is here <http://user-mode-linux.source- - forge.net/> and explains these in detail, as well as - some other issues. - There is also a related point-to-point only "ucast" transport. This is useful when your network does not support multicast, and all network connections are simple point to point links. - The full set of command line options for this transport are + The full set of command line options for this transport are:: ethn=ucast,ethernet address,remote address,listen port,remote port @@ -1194,7 +1143,8 @@ - 6.6. TUN/TAP with the uml_net helper +6.6. TUN/TAP with the uml_net helper +------------------------------------- TUN/TAP is the preferred mechanism on 2.4 to exchange packets with the host. The TUN/TAP backend has been in UML since 2.4.9-3um. @@ -1216,7 +1166,7 @@ kernel or as the tun.o module. The format of the command line switch to attach a device to a TUN/TAP - device is + device is:: eth <n> =tuntap,,, <IP address> @@ -1226,7 +1176,7 @@ For example, this argument will attach the UML's eth0 to the next available tap device and assign an ethernet address to it based on its - IP address + IP address:: eth0=tuntap,,,192.168.0.254 @@ -1247,10 +1197,10 @@ There are a couple potential problems with running the TUN/TAP transport on a 2.4 host kernel - o TUN/TAP seems not to work on 2.4.3 and earlier. Upgrade the host + - TUN/TAP seems not to work on 2.4.3 and earlier. Upgrade the host kernel or use the ethertap transport. - o With an upgraded kernel, TUN/TAP may fail with + - With an upgraded kernel, TUN/TAP may fail with:: File descriptor in bad state @@ -1263,13 +1213,12 @@ make sure that /usr/src/linux points to the headers for the running kernel. - These were pointed out by Tim Robinson <timro at trkr dot net> in - <http://www.geocrawler.com/> name="this uml- - user post"> . + These were pointed out by Tim Robinson <timro at trkr dot net> in the past. - 6.7. TUN/TAP with a preconfigured tap device +6.7. TUN/TAP with a preconfigured tap device +--------------------------------------------- If you prefer not to have UML use uml_net (which is somewhat insecure), with UML 2.4.17-11, you can set up a TUN/TAP device @@ -1277,8 +1226,8 @@ there is no need for root assistance. Setting up the device is done as follows: - o Create the device with tunctl (available from the UML utilities - tarball) + - Create the device with tunctl (available from the UML utilities + tarball):: @@ -1291,8 +1240,8 @@ where uid is the user id or username that UML will be run as. This will tell you what device was created. - o Configure the device IP (change IP addresses and device name to - suit) + - Configure the device IP (change IP addresses and device name to + suit):: @@ -1303,8 +1252,8 @@ - o Set up routing and arping if desired - this is my recipe, there are - other ways of doing the same thing + - Set up routing and arping if desired - this is my recipe, there are + other ways of doing the same thing:: host# @@ -1313,19 +1262,9 @@ host# route add -host 192.168.0.253 dev tap0 - - - - - host# bash -c 'echo 1 > /proc/sys/net/ipv4/conf/tap0/proxy_arp' - - - - - host# arp -Ds 192.168.0.253 eth0 pub @@ -1338,76 +1277,43 @@ utility which reads the information from a config file and sets up devices at boot time. - o Rather than using up two IPs and ARPing for one of them, you can + - Rather than using up two IPs and ARPing for one of them, you can also provide direct access to your LAN by the UML by using a - bridge. + bridge:: host# brctl addbr br0 - - - - host# ifconfig eth0 0.0.0.0 promisc up - - - - host# ifconfig tap0 0.0.0.0 promisc up - - - - host# ifconfig br0 192.168.0.1 netmask 255.255.255.0 up - - - - - - host# - brctl stp br0 off - - - - + host# + brctl stp br0 off host# brctl setfd br0 1 - - - - host# brctl sethello br0 1 - - - - host# brctl addif br0 eth0 - - - - host# brctl addif br0 tap0 @@ -1417,12 +1323,12 @@ Note that 'br0' should be setup using ifconfig with the existing IP address of eth0, as eth0 no longer has its own IP. - o + - Also, the /dev/net/tun device must be writable by the user running UML in order for the UML to use the device that's been configured - for it. The simplest thing to do is + for it. The simplest thing to do is:: host# chmod 666 /dev/net/tun @@ -1438,14 +1344,14 @@ devices and chgrp /dev/net/tun to that group with mode 664 or 660. - o Once the device is set up, run UML with 'eth0=tuntap,device name' + - Once the device is set up, run UML with 'eth0=tuntap,device name' (i.e. 'eth0=tuntap,tap0') on the command line (or do it with the mconsole config command). - o Bring the eth device up in UML and you're in business. + - Bring the eth device up in UML and you're in business. If you don't want that tap device any more, you can make it non- - persistent with + persistent with:: host# tunctl -d tap device @@ -1455,7 +1361,7 @@ Finally, tunctl has a -b (for brief mode) switch which causes it to output only the name of the tap device it created. This makes it - suitable for capture by a script: + suitable for capture by a script:: host# TAP=`tunctl -u 1000 -b` @@ -1465,7 +1371,8 @@ - 6.8. Ethertap +6.8. Ethertap +-------------- Ethertap is the general mechanism on 2.2 for userspace processes to exchange packets with the kernel. @@ -1473,7 +1380,7 @@ To use this transport, you need to describe the virtual network device - on the UML command line. The general format for this is + on the UML command line. The general format for this is:: eth <n> =ethertap, <device> , <ethernet address> , <tap IP address> @@ -1481,7 +1388,7 @@ - So, the previous example + So, the previous example:: eth0=ethertap,tap0,fe:fd:0:0:0:1,192.168.0.254 @@ -1521,7 +1428,7 @@ If you want to set things up yourself, you need to make sure that the appropriate /dev entry exists. If it doesn't, become root and create - it as follows: + it as follows:: mknod /dev/tap <minor> c 36 <minor> + 16 @@ -1529,7 +1436,7 @@ - For example, this is how to create /dev/tap0: + For example, this is how to create /dev/tap0:: mknod /dev/tap0 c 36 0 + 16 @@ -1539,7 +1446,7 @@ You also need to make sure that the host kernel has ethertap support. If ethertap is enabled as a module, you apparently need to insmod - ethertap once for each ethertap device you want to enable. So, + ethertap once for each ethertap device you want to enable. So,:: host# @@ -1549,7 +1456,7 @@ will give you the tap0 interface. To get the tap1 interface, you need - to run + to run:: host# @@ -1561,7 +1468,8 @@ - 6.9. The switch daemon +6.9. The switch daemon +----------------------- Note: This is the daemon formerly known as uml_router, but which was renamed so the network weenies of the world would stop growling at me. @@ -1577,7 +1485,7 @@ sockets. - If you want it to listen on a different pair of sockets, use + If you want it to listen on a different pair of sockets, use:: -unix control socket data socket @@ -1586,7 +1494,7 @@ - If you want it to act as a hub rather than a switch, use + If you want it to act as a hub rather than a switch, use:: -hub @@ -1596,7 +1504,7 @@ If you want the switch to be connected to host networking (allowing - the umls to get access to the outside world through the host), use + the umls to get access to the outside world through the host), use:: -tap tap0 @@ -1610,7 +1518,7 @@ device than tap0, specify that instead of tap0. - uml_switch can be backgrounded as follows + uml_switch can be backgrounded as follows:: host% @@ -1623,7 +1531,7 @@ stdin for EOF. When it sees that, it exits. - The general format of the kernel command line switch is + The general format of the kernel command line switch is:: @@ -1639,7 +1547,8 @@ how to communicate with the daemon. You should only specify them if you told the daemon to use different sockets than the default. So, if you ran the daemon with no arguments, running the UML on the same - machine with + machine with:: + eth0=daemon @@ -1649,7 +1558,8 @@ - 6.10. Slip +6.10. Slip +----------- Slip is another, less general, mechanism for a process to communicate with the host networking. In contrast to the ethertap interface, @@ -1658,7 +1568,7 @@ IP. - The general format of the command line switch is + The general format of the command line switch is:: @@ -1681,7 +1591,8 @@ - 6.11. Slirp +6.11. Slirp +------------ slirp uses an external program, usually /usr/bin/slirp, to provide IP only networking connectivity through the host. This is similar to IP @@ -1691,7 +1602,7 @@ root access or setuid binaries on the host. - The general format of the command line switch for slirp is: + The general format of the command line switch for slirp is:: @@ -1716,7 +1627,7 @@ The eth0 interface on UML should be set up with the IP 10.2.0.15, although you can use anything as long as it is not used by a network you will be connecting to. The default route on UML should be set to - use + use:: UML# @@ -1737,10 +1648,11 @@ - 6.12. pcap +6.12. pcap +----------- The pcap transport is attached to a UML ethernet device on the command - line or with uml_mconsole with the following syntax: + line or with uml_mconsole with the following syntax:: @@ -1762,7 +1674,7 @@ expression optimizer is used. - Example: + Example:: @@ -1777,7 +1689,8 @@ - 6.13. Setting up the host yourself +6.13. Setting up the host yourself +----------------------------------- If you don't specify an address for the host side of the ethertap or slip device, UML won't do any setup on the host. So this is what is @@ -1785,19 +1698,15 @@ 192.168.0.251 and a UML-side IP of 192.168.0.250 - adjust to suit your own network): - o The device needs to be configured with its IP address. Tap devices + - The device needs to be configured with its IP address. Tap devices are also configured with an mtu of 1484. Slip devices are configured with a point-to-point address pointing at the UML ip - address. + address:: host# ifconfig tap0 arp mtu 1484 192.168.0.251 up - - - - host# ifconfig sl0 192.168.0.251 pointopoint 192.168.0.250 up @@ -1805,7 +1714,7 @@ - o If a tap device is being set up, a route is set to the UML IP. + - If a tap device is being set up, a route is set to the UML IP:: UML# route add -host 192.168.0.250 gw 192.168.0.251 @@ -1814,8 +1723,8 @@ - o To allow other hosts on your network to see the virtual machine, - proxy arp is set up for it. + - To allow other hosts on your network to see the virtual machine, + proxy arp is set up for it:: host# arp -Ds 192.168.0.250 eth0 pub @@ -1824,7 +1733,7 @@ - o Finally, the host is set up to route packets. + - Finally, the host is set up to route packets:: host# echo 1 > /proc/sys/net/ipv4/ip_forward @@ -1838,12 +1747,14 @@ - 7. Sharing Filesystems between Virtual Machines +7. Sharing Filesystems between Virtual Machines +================================================ - 7.1. A warning +7.1. A warning +--------------- Don't attempt to share filesystems simply by booting two UMLs from the same file. That's the same thing as booting two physical machines @@ -1851,7 +1762,8 @@ - 7.2. Using layered block devices +7.2. Using layered block devices +--------------------------------- The way to share a filesystem between two virtual machines is to use the copy-on-write (COW) layering capability of the ubd block driver. @@ -1872,7 +1784,7 @@ To add a copy-on-write layer to an existing block device file, simply - add the name of the COW file to the appropriate ubd switch: + add the name of the COW file to the appropriate ubd switch:: ubd0=root_fs_cow,root_fs_debian_22 @@ -1883,7 +1795,7 @@ where 'root_fs_cow' is the private COW file and 'root_fs_debian_22' is the existing shared filesystem. The COW file need not exist. If it doesn't, the driver will create and initialize it. Once the COW file - has been initialized, it can be used on its own on the command line: + has been initialized, it can be used on its own on the command line:: ubd0=root_fs_cow @@ -1896,14 +1808,16 @@ - 7.3. Note! +7.3. Note! +----------- When checking the size of the COW file in order to see the gobs of space that you're saving, make sure you use 'ls -ls' to see the actual disk consumption rather than the length of the file. The COW file is sparse, so the length will be very different from the disk usage. Here is a 'ls -l' of a COW file and backing file from one boot and - shutdown: + shutdown:: + host% ls -l cow.debian debian2.2 -rw-r--r-- 1 jdike jdike 492504064 Aug 6 21:16 cow.debian -rwxrw-rw- 1 jdike jdike 537919488 Aug 6 20:42 debian2.2 @@ -1911,7 +1825,7 @@ - Doesn't look like much saved space, does it? Well, here's 'ls -ls': + Doesn't look like much saved space, does it? Well, here's 'ls -ls':: host% ls -ls cow.debian debian2.2 @@ -1926,7 +1840,8 @@ - 7.4. Another warning +7.4. Another warning +--------------------- Once a filesystem is being used as a readonly backing file for a COW file, do not boot directly from it or modify it in any way. Doing so @@ -1952,7 +1867,8 @@ - 7.5. uml_moo : Merging a COW file with its backing file +7.5. uml_moo : Merging a COW file with its backing file +-------------------------------------------------------- Depending on how you use UML and COW devices, it may be advisable to merge the changes in the COW file into the backing file every once in @@ -1961,7 +1877,7 @@ - The utility that does this is uml_moo. Its usage is + The utility that does this is uml_moo. Its usage is:: host% uml_moo COW file new backing file @@ -1991,8 +1907,8 @@ uml_moo is installed with the UML deb and RPM. If you didn't install UML from one of those packages, you can also get it from the UML - utilities <http://user-mode-linux.sourceforge.net/ - utilities> tar file in tools/moo. + utilities http://user-mode-linux.sourceforge.net/utilities tar file + in tools/moo. @@ -2001,7 +1917,8 @@ - 8. Creating filesystems +8. Creating filesystems +======================== You may want to create and mount new UML filesystems, either because @@ -2015,13 +1932,14 @@ should be easy to translate to the filesystem of your choice. - 8.1. Create the filesystem file +8.1. Create the filesystem file +================================ dd is your friend. All you need to do is tell dd to create an empty file of the appropriate size. I usually make it sparse to save time and to avoid allocating disk space until it's actually used. For example, the following command will create a sparse 100 meg file full - of zeroes. + of zeroes:: host% @@ -2034,9 +1952,9 @@ 8.2. Assign the file to a UML device - Add an argument like the following to the UML command line: + Add an argument like the following to the UML command line:: - ubd4=new_filesystem + ubd4=new_filesystem @@ -2053,7 +1971,7 @@ etc), then get them into UML by way of the net or hostfs. - Make the new filesystem on the device assigned to the new file: + Make the new filesystem on the device assigned to the new file:: host# mkreiserfs /dev/ubd/4 @@ -2077,7 +1995,7 @@ - Now, mount it: + Now, mount it:: UML# @@ -2096,7 +2014,8 @@ - 9. Host file access +9. Host file access +==================== If you want to access files on the host machine from inside UML, you @@ -2112,10 +2031,11 @@ files contained in it just as you would on the host. - 9.1. Using hostfs +9.1. Using hostfs +------------------ To begin with, make sure that hostfs is available inside the virtual - machine with + machine with:: UML# cat /proc/filesystems @@ -2127,7 +2047,7 @@ module and available inside the virtual machine, and insmod it. - Now all you need to do is run mount: + Now all you need to do is run mount:: UML# mount none /mnt/host -t hostfs @@ -2139,7 +2059,7 @@ If you don't want to mount the host root directory, then you can - specify a subdirectory to mount with the -o switch to mount: + specify a subdirectory to mount with the -o switch to mount:: UML# mount none /mnt/home -t hostfs -o /home @@ -2151,13 +2071,14 @@ - 9.2. hostfs as the root filesystem +9.2. hostfs as the root filesystem +----------------------------------- It's possible to boot from a directory hierarchy on the host using hostfs rather than using the standard filesystem in a file. To start, you need that hierarchy. The easiest way is to loop mount - an existing root_fs file: + an existing root_fs file:: host# mount root_fs uml_root_dir -o loop @@ -2166,15 +2087,15 @@ You need to change the filesystem type of / in etc/fstab to be - 'hostfs', so that line looks like this: + 'hostfs', so that line looks like this:: - /dev/ubd/0 / hostfs defaults 1 1 + /dev/ubd/0 / hostfs defaults 1 1 Then you need to chown to yourself all the files in that directory - that are owned by root. This worked for me: + that are owned by root. This worked for me:: host# find . -uid 0 -exec chown jdike {} \; @@ -2183,7 +2104,7 @@ Next, make sure that your UML kernel has hostfs compiled in, not as a - module. Then run UML with the boot device pointing at that directory: + module. Then run UML with the boot device pointing at that directory:: ubd0=/path/to/uml/root/directory @@ -2194,41 +2115,35 @@ UML should then boot as it does normally. - 9.3. Building hostfs +9.3. Building hostfs +--------------------- If you need to build hostfs because it's not in your kernel, you have two choices: - o Compiling hostfs into the kernel: + - Compiling hostfs into the kernel: Reconfigure the kernel and set the 'Host filesystem' option under - o Compiling hostfs as a module: + - Compiling hostfs as a module: Reconfigure the kernel and set the 'Host filesystem' option under be in arch/um/fs/hostfs/hostfs.o. Install that in - /lib/modules/`uname -r`/fs in the virtual machine, boot it up, and + ``/lib/modules/$(uname -r)/fs`` in the virtual machine, boot it up, and:: UML# insmod hostfs +.. _The_Management_Console: - - - - - - - - - - 10. The Management Console +10. The Management Console +=========================== @@ -2240,15 +2155,15 @@ There are a number of things you can do with the mconsole interface: - o get the kernel version + - get the kernel version - o add and remove devices + - add and remove devices - o halt or reboot the machine + - halt or reboot the machine - o Send SysRq commands + - Send SysRq commands - o Pause and resume the UML + - Pause and resume the UML You need the mconsole client (uml_mconsole) which is present in CVS @@ -2257,7 +2172,7 @@ You also need CONFIG_MCONSOLE (under 'General Setup') enabled in UML. - When you boot UML, you'll see a line like: + When you boot UML, you'll see a line like:: mconsole initialized on /home/jdike/.uml/umlNJ32yL/mconsole @@ -2265,7 +2180,7 @@ - If you specify a unique machine id one the UML command line, i.e. + If you specify a unique machine id one the UML command line, i.e.:: umid=debian @@ -2273,7 +2188,7 @@ - you'll see this + you'll see this:: mconsole initialized on /home/jdike/.uml/debian/mconsole @@ -2282,7 +2197,7 @@ That file is the socket that uml_mconsole will use to communicate with - UML. Run it with either the umid or the full path as its argument: + UML. Run it with either the umid or the full path as its argument:: host% uml_mconsole debian @@ -2290,7 +2205,7 @@ - or + or:: host% uml_mconsole /home/jdike/.uml/debian/mconsole @@ -2300,30 +2215,31 @@ You'll get a prompt, at which you can run one of these commands: - o version + - version - o halt + - halt - o reboot + - reboot - o config + - config - o remove + - remove - o sysrq + - sysrq - o help + - help - o cad + - cad - o stop + - stop - o go + - go - 10.1. version +10.1. version +-------------- - This takes no arguments. It prints the UML version. + This takes no arguments. It prints the UML version:: (mconsole) version @@ -2342,11 +2258,12 @@ - 10.2. halt and reboot +10.2. halt and reboot +---------------------- These take no arguments. They shut the machine down immediately, with no syncing of disks and no clean shutdown of userspace. So, they are - pretty close to crashing the machine. + pretty close to crashing the machine:: (mconsole) halt @@ -2357,34 +2274,36 @@ - 10.3. config +10.3. config +------------- "config" adds a new device to the virtual machine. Currently the ubd and network drivers support this. It takes one argument, which is the - device to add, with the same syntax as the kernel command line. + device to add, with the same syntax as the kernel command line:: - (mconsole) - config ubd3=/home/jdike/incoming/roots/root_fs_debian22 + (mconsole) + config ubd3=/home/jdike/incoming/roots/root_fs_debian22 - OK - (mconsole) config eth1=mcast - OK + OK + (mconsole) config eth1=mcast + OK - 10.4. remove +10.4. remove +------------- "remove" deletes a device from the system. Its argument is just the name of the device to be removed. The device must be idle in whatever sense the driver considers necessary. In the case of the ubd driver, the removed block device must not be mounted, swapped on, or otherwise - open, and in the case of the network driver, the device must be down. + open, and in the case of the network driver, the device must be down:: (mconsole) remove ubd3 @@ -2397,7 +2316,8 @@ - 10.5. sysrq +10.5. sysrq +------------ This takes one argument, which is a single letter. It calls the generic kernel's SysRq driver, which does whatever is called for by @@ -2407,19 +2327,21 @@ - 10.6. help +10.6. help +----------- "help" returns a string listing the valid commands and what each one does. - 10.7. cad +10.7. cad +---------- This invokes the Ctl-Alt-Del action on init. What exactly this ends up doing is up to /etc/inittab. Normally, it reboots the machine. With UML, this is usually not desired, so if a halt would be better, - then find the section of inittab that looks like this + then find the section of inittab that looks like this:: # What to do when CTRL-ALT-DEL is pressed. @@ -2432,7 +2354,8 @@ - 10.8. stop +10.8. stop +----------- This puts the UML in a loop reading mconsole requests until a 'go' mconsole command is received. This is very useful for making backups @@ -2448,7 +2371,8 @@ - 10.9. go +10.9. go +--------- This resumes a UML after being paused by a 'stop' command. Note that when the UML has resumed, TCP connections may have timed out and if @@ -2460,9 +2384,10 @@ +.. _Kernel_debugging: - - 11. Kernel debugging +11. Kernel debugging +===================== Note: The interface that makes debugging, as described here, possible @@ -2477,15 +2402,16 @@ In order to debug the kernel, you need build it from source. See - ``Compiling the kernel and modules'' for information on doing that. + :ref:`Compiling_the_kernel_and_modules` for information on doing that. Make sure that you enable CONFIG_DEBUGSYM and CONFIG_PT_PROXY during - the config. These will compile the kernel with -g, and enable the + the config. These will compile the kernel with ``-g``, and enable the ptrace proxy so that gdb works with UML, respectively. - 11.1. Starting the kernel under gdb +11.1. Starting the kernel under gdb +------------------------------------ You can have the kernel running under the control of gdb from the beginning by putting 'debug' on the command line. You will get an @@ -2498,7 +2424,11 @@ There is a transcript of a debugging session here <debug- session.html> , with breakpoints being set in the scheduler and in an interrupt handler. - 11.2. Examining sleeping processes + + +11.2. Examining sleeping processes +----------------------------------- + Not every bug is evident in the currently running process. Sometimes, processes hang in the kernel when they shouldn't because they've @@ -2516,7 +2446,7 @@ Now what you do is this: - o detach from the current thread + - detach from the current thread:: (UML gdb) det @@ -2525,7 +2455,7 @@ - o attach to the thread you are interested in + - attach to the thread you are interested in:: (UML gdb) att <host pid> @@ -2534,7 +2464,7 @@ - o look at its stack and anything else of interest + - look at its stack and anything else of interest:: (UML gdb) bt @@ -2545,18 +2475,14 @@ Note that you can't do anything at this point that requires that a process execute, e.g. calling a function - o when you're done looking at that process, reattach to the current - thread and continue it + - when you're done looking at that process, reattach to the current + thread and continue it:: (UML gdb) att 1 - - - - (UML gdb) c @@ -2569,12 +2495,13 @@ - 11.3. Running ddd on UML +11.3. Running ddd on UML +------------------------- ddd works on UML, but requires a special kludge. The process goes like this: - o Start ddd + - Start ddd:: host% ddd linux @@ -2583,14 +2510,14 @@ - o With ps, get the pid of the gdb that ddd started. You can ask the + - With ps, get the pid of the gdb that ddd started. You can ask the gdb to tell you, but for some reason that confuses things and causes a hang. - o run UML with 'debug=parent gdb-pid=<pid>' added to the command line + - run UML with 'debug=parent gdb-pid=<pid>' added to the command line - it will just sit there after you hit return - o type 'att 1' to the ddd gdb and you will see something like + - type 'att 1' to the ddd gdb and you will see something like:: 0xa013dc51 in __kill () @@ -2602,12 +2529,14 @@ - o At this point, type 'c', UML will boot up, and you can use ddd just + - At this point, type 'c', UML will boot up, and you can use ddd just as you do on any other process. - 11.4. Debugging modules +11.4. Debugging modules +------------------------ + gdb has support for debugging code which is dynamically loaded into the process. This support is what is needed to debug kernel modules @@ -2629,7 +2558,8 @@ First, you must tell it where your modules are. There is a list in - the script that looks like this: + the script that looks like this:: + set MODULE_PATHS { "fat" "/usr/src/uml/linux-2.4.18/fs/fat/fat.o" "isofs" "/usr/src/uml/linux-2.4.18/fs/isofs/isofs.o" @@ -2641,9 +2571,7 @@ You change that to list the names and paths of the modules that you are going to debug. Then you run it from the toplevel directory of - your UML pool and it basically tells you what to do: - - + your UML pool and it basically tells you what to do:: ******** GDB pid is 21903 ******** @@ -2666,7 +2594,7 @@ After you run UML and it sits there doing nothing, you hit return at - the 'att 1' and continue it: + the 'att 1' and continue it:: Attaching to program: /home/jdike/linux/2.4/um/./linux, process 1 @@ -2678,63 +2606,48 @@ At this point, you debug normally. When you insmod something, the - expect magic will kick in and you'll see something like: - - - - - - - - - - - - - - - - - - *** Module hostfs loaded *** - Breakpoint 1, sys_init_module (name_user=0x805abb0 "hostfs", - mod_user=0x8070e00) at module.c:349 - 349 char *name, *n_name, *name_tmp = NULL; - (UML gdb) finish - Run till exit from #0 sys_init_module (name_user=0x805abb0 "hostfs", - mod_user=0x8070e00) at module.c:349 - 0xa00e2e23 in execute_syscall (r=0xa8140284) at syscall_kern.c:411 - 411 else res = EXECUTE_SYSCALL(syscall, regs); - Value returned is $1 = 0 - (UML gdb) - p/x (int)module_list + module_list->size_of_struct - - $2 = 0xa9021054 - (UML gdb) symbol-file ./linux - Load new symbol table from "./linux"? (y or n) y - Reading symbols from ./linux... - done. - (UML gdb) - add-symbol-file /home/jdike/linux/2.4/um/arch/um/fs/hostfs/hostfs.o 0xa9021054 - - add symbol table from file "/home/jdike/linux/2.4/um/arch/um/fs/hostfs/hostfs.o" at - .text_addr = 0xa9021054 - (y or n) y - - Reading symbols from /home/jdike/linux/2.4/um/arch/um/fs/hostfs/hostfs.o... - done. - (UML gdb) p *module_list - $1 = {size_of_struct = 84, next = 0xa0178720, name = 0xa9022de0 "hostfs", - size = 9016, uc = {usecount = {counter = 0}, pad = 0}, flags = 1, - nsyms = 57, ndeps = 0, syms = 0xa9023170, deps = 0x0, refs = 0x0, - init = 0xa90221f0 <init_hostfs>, cleanup = 0xa902222c <exit_hostfs>, - ex_table_start = 0x0, ex_table_end = 0x0, persist_start = 0x0, - persist_end = 0x0, can_unload = 0, runsize = 0, kallsyms_start = 0x0, - kallsyms_end = 0x0, - archdata_start = 0x1b855 <Address 0x1b855 out of bounds>, - archdata_end = 0xe5890000 <Address 0xe5890000 out of bounds>, - kernel_data = 0xf689c35d <Address 0xf689c35d out of bounds>} - >> Finished loading symbols for hostfs ... + expect magic will kick in and you'll see something like:: + + + *** Module hostfs loaded *** + Breakpoint 1, sys_init_module (name_user=0x805abb0 "hostfs", + mod_user=0x8070e00) at module.c:349 + 349 char *name, *n_name, *name_tmp = NULL; + (UML gdb) finish + Run till exit from #0 sys_init_module (name_user=0x805abb0 "hostfs", + mod_user=0x8070e00) at module.c:349 + 0xa00e2e23 in execute_syscall (r=0xa8140284) at syscall_kern.c:411 + 411 else res = EXECUTE_SYSCALL(syscall, regs); + Value returned is $1 = 0 + (UML gdb) + p/x (int)module_list + module_list->size_of_struct + + $2 = 0xa9021054 + (UML gdb) symbol-file ./linux + Load new symbol table from "./linux"? (y or n) y + Reading symbols from ./linux... + done. + (UML gdb) + add-symbol-file /home/jdike/linux/2.4/um/arch/um/fs/hostfs/hostfs.o 0xa9021054 + + add symbol table from file "/home/jdike/linux/2.4/um/arch/um/fs/hostfs/hostfs.o" at + .text_addr = 0xa9021054 + (y or n) y + + Reading symbols from /home/jdike/linux/2.4/um/arch/um/fs/hostfs/hostfs.o... + done. + (UML gdb) p *module_list + $1 = {size_of_struct = 84, next = 0xa0178720, name = 0xa9022de0 "hostfs", + size = 9016, uc = {usecount = {counter = 0}, pad = 0}, flags = 1, + nsyms = 57, ndeps = 0, syms = 0xa9023170, deps = 0x0, refs = 0x0, + init = 0xa90221f0 <init_hostfs>, cleanup = 0xa902222c <exit_hostfs>, + ex_table_start = 0x0, ex_table_end = 0x0, persist_start = 0x0, + persist_end = 0x0, can_unload = 0, runsize = 0, kallsyms_start = 0x0, + kallsyms_end = 0x0, + archdata_start = 0x1b855 <Address 0x1b855 out of bounds>, + archdata_end = 0xe5890000 <Address 0xe5890000 out of bounds>, + kernel_data = 0xf689c35d <Address 0xf689c35d out of bounds>} + >> Finished loading symbols for hostfs ... @@ -2744,7 +2657,7 @@ Boot the kernel under the debugger and load the module with insmod or - modprobe. With gdb, do: + modprobe. With gdb, do:: (UML gdb) p module_list @@ -2758,12 +2671,12 @@ the name fields until find the module you want to debug. Take the address of that structure, and add module.size_of_struct (which in 2.4.10 kernels is 96 (0x60)) to it. Gdb can make this hard addition - for you :-): + for you :-):: - (UML gdb) - printf "%#x\n", (int)module_list module_list->size_of_struct + (UML gdb) + printf "%#x\n", (int)module_list module_list->size_of_struct @@ -2771,7 +2684,7 @@ The offset from the module start occasionally changes (before 2.4.0, it was module.size_of_struct + 4), so it's a good idea to check the init and cleanup addresses once in a while, as describe below. Now - do: + do:: (UML gdb) @@ -2786,7 +2699,7 @@ If there's any doubt that you got the offset right, like breakpoints appear not to work, or they're appearing in the wrong place, you can check it by looking at the module structure. The init and cleanup - fields should look like: + fields should look like:: init = 0x588066b0 <init_hostfs>, cleanup = 0x588066c0 <exit_hostfs> @@ -2801,7 +2714,7 @@ When you want to load in a new version of the module, you need to get gdb to forget about the old one. The only way I've found to do that - is to tell gdb to forget about all symbols that it knows about: + is to tell gdb to forget about all symbols that it knows about:: (UML gdb) symbol-file @@ -2809,7 +2722,7 @@ - Then reload the symbols from the kernel binary: + Then reload the symbols from the kernel binary:: (UML gdb) symbol-file /path/to/kernel @@ -2823,17 +2736,19 @@ - 11.5. Attaching gdb to the kernel +11.5. Attaching gdb to the kernel +---------------------------------- If you don't have the kernel running under gdb, you can attach gdb to it later by sending the tracing thread a SIGUSR1. The first line of - the console output identifies its pid: + the console output identifies its pid:: + tracing thread pid = 20093 - When you send it the signal: + When you send it the signal:: host% kill -USR1 20093 @@ -2845,7 +2760,7 @@ If you have the mconsole compiled into UML, then the mconsole client - can be used to start gdb: + can be used to start gdb:: (mconsole) (mconsole) config gdb=xterm @@ -2857,7 +2772,8 @@ - 11.6. Using alternate debuggers +11.6. Using alternate debuggers +-------------------------------- UML has support for attaching to an already running debugger rather than starting gdb itself. This is present in CVS as of 17 Apr 2001. @@ -2886,7 +2802,7 @@ An example of an alternate debugger is strace. You can strace the actual kernel as follows: - o Run the following in a shell + - Run the following in a shell:: host% @@ -2894,13 +2810,13 @@ - o Run UML with 'debug' and 'gdb-pid=<pid>' with the pid printed out + - Run UML with 'debug' and 'gdb-pid=<pid>' with the pid printed out by the previous command - o Hit return in the shell, and UML will start running, and strace + - Hit return in the shell, and UML will start running, and strace output will start accumulating in the output file. - Note that this is different from running + Note that this is different from running:: host% strace ./linux @@ -2917,95 +2833,57 @@ - 12. Kernel debugging examples +12. Kernel debugging examples +============================== - 12.1. The case of the hung fsck +12.1. The case of the hung fsck +-------------------------------- When booting up the kernel, fsck failed, and dropped me into a shell - to fix things up. I ran fsck -y, which hung: - - - - - - - - - - - - - - - - - - - - - - - - - + to fix things up. I ran fsck -y, which hung:: + Setting hostname uml [ OK ] + Checking root filesystem + /dev/fhd0 was not cleanly unmounted, check forced. + Error reading block 86894 (Attempt to read block from filesystem resulted in short read) while reading indirect blocks of inode 19780. + /dev/fhd0: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY. + (i.e., without -a or -p options) + [ FAILED ] + *** An error occurred during the file system check. + *** Dropping you to a shell; the system will reboot + *** when you leave the shell. + Give root password for maintenance + (or type Control-D for normal startup): + [root@uml /root]# fsck -y /dev/fhd0 + fsck -y /dev/fhd0 + Parallelizing fsck version 1.14 (9-Jan-1999) + e2fsck 1.14, 9-Jan-1999 for EXT2 FS 0.5b, 95/08/09 + /dev/fhd0 contains a file system with errors, check forced. + Pass 1: Checking inodes, blocks, and sizes + Error reading block 86894 (Attempt to read block from filesystem resulted in short read) while reading indirect blocks of inode 19780. Ignore error? yes + Inode 19780, i_blocks is 1548, should be 540. Fix? yes + Pass 2: Checking directory structure + Error reading block 49405 (Attempt to read block from filesystem resulted in short read). Ignore error? yes + Directory inode 11858, block 0, offset 0: directory corrupted + Salvage? yes + Missing '.' in directory inode 11858. + Fix? yes - - - Setting hostname uml [ OK ] - Checking root filesystem - /dev/fhd0 was not cleanly unmounted, check forced. - Error reading block 86894 (Attempt to read block from filesystem resulted in short read) while reading indirect blocks of inode 19780. - - /dev/fhd0: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY. - (i.e., without -a or -p options) - [ FAILED ] - - *** An error occurred during the file system check. - *** Dropping you to a shell; the system will reboot - *** when you leave the shell. - Give root password for maintenance - (or type Control-D for normal startup): - - [root@uml /root]# fsck -y /dev/fhd0 - fsck -y /dev/fhd0 - Parallelizing fsck version 1.14 (9-Jan-1999) - e2fsck 1.14, 9-Jan-1999 for EXT2 FS 0.5b, 95/08/09 - /dev/fhd0 contains a file system with errors, check forced. - Pass 1: Checking inodes, blocks, and sizes - Error reading block 86894 (Attempt to read block from filesystem resulted in short read) while reading indirect blocks of inode 19780. Ignore error? yes - - Inode 19780, i_blocks is 1548, should be 540. Fix? yes - - Pass 2: Checking directory structure - Error reading block 49405 (Attempt to read block from filesystem resulted in short read). Ignore error? yes - - Directory inode 11858, block 0, offset 0: directory corrupted - Salvage? yes - - Missing '.' in directory inode 11858. - Fix? yes - - Missing '..' in directory inode 11858. - Fix? yes - - - + Missing '..' in directory inode 11858. + Fix? yes The standard drill in this sort of situation is to fire up gdb on the signal thread, which, in this case, was pid 1935. In another window, - I run gdb and attach pid 1935. - - + I run gdb and attach pid 1935:: ~/linux/2.3.26/um 1016: gdb linux @@ -3022,11 +2900,7 @@ 0x100756d9 in __wait4 () - - - - - Let's see what's currently running: + Let's see what's currently running:: @@ -3041,7 +2915,7 @@ reason and never woke up. - Let's guess that the last process in the process list is fsck: + Let's guess that the last process in the process list is fsck:: @@ -3052,7 +2926,7 @@ - It is, so let's see what it thinks it's up to: + It is, so let's see what it thinks it's up to:: @@ -3068,8 +2942,6 @@ - - The interesting things here are the fact that its .thread.syscall.id is __NR_write (see the big switch in arch/um/kernel/syscall_kern.c or the defines in include/asm-um/arch/unistd.h), and that it never @@ -3081,30 +2953,20 @@ The fact that it never returned from write means that its stack should be fairly interesting. Its pid is 1980 (.thread.extern_pid). That process is being ptraced by the signal thread, so it must be detached - before gdb can attach it: - - - - - - + before gdb can attach it:: + (gdb) call detach(1980) - (gdb) call detach(1980) - - Program received signal SIGSEGV, Segmentation fault. - <function called from gdb> - The program being debugged stopped while in a function called from GDB. - When the function (detach) is done executing, GDB will silently - stop (instead of continuing to evaluate the expression containing - the function call). - (gdb) call detach(1980) - $15 = 0 - - - + Program received signal SIGSEGV, Segmentation fault. + <function called from gdb> + The program being debugged stopped while in a function called from GDB. + When the function (detach) is done executing, GDB will silently + stop (instead of continuing to evaluate the expression containing + the function call). + (gdb) call detach(1980) + $15 = 0 The first detach segfaults for some reason, and the second one @@ -3112,7 +2974,7 @@ Now I detach from the signal thread, attach to the fsck thread, and - look at its stack: + look at its stack:: (gdb) det @@ -3152,14 +3014,14 @@ - The interesting things here are : + The interesting things here are: - o There are two segfaults on this stack (frames 9 and 14) + - There are two segfaults on this stack (frames 9 and 14) - o The first faulting address (frame 11) is 0x50000800 + - The first faulting address (frame 11) is 0x50000800:: - (gdb) p (void *)1342179328 - $16 = (void *) 0x50000800 + (gdb) p (void *)1342179328 + $16 = (void *) 0x50000800 @@ -3175,7 +3037,7 @@ However, the more immediate problem is that second segfault and I'm going to concentrate on that. First, I want to see where the fault - happened, so I have to go look at the sigcontent struct in frame 8: + happened, so I have to go look at the sigcontent struct in frame 8:: @@ -3211,7 +3073,7 @@ - That's not very useful, so I'll try a more manual method: + That's not very useful, so I'll try a more manual method:: (gdb) p *((struct sigcontext *) (&sig + 1)) @@ -3224,7 +3086,7 @@ - The ip is in handle_mm_fault: + The ip is in handle_mm_fault:: (gdb) p (void *)268480945 @@ -3236,7 +3098,7 @@ - Specifically, it's in pte_alloc: + Specifically, it's in pte_alloc:: (gdb) i line *$20 @@ -3249,7 +3111,7 @@ To find where in handle_mm_fault this is, I'll jump forward in the - code until I see an address in that procedure: + code until I see an address in that procedure:: @@ -3286,21 +3148,21 @@ Something is apparently wrong with the page tables or vma_structs, so - lets go back to frame 11 and have a look at them: + lets go back to frame 11 and have a look at them:: - #11 0x1006c0aa in segv (address=1342179328, is_write=2) at trap_kern.c:50 - 50 handle_mm_fault(current, vma, address, is_write); - (gdb) call pgd_offset_proc(vma->vm_mm, address) - $22 = (pgd_t *) 0x80a548c + #11 0x1006c0aa in segv (address=1342179328, is_write=2) at trap_kern.c:50 + 50 handle_mm_fault(current, vma, address, is_write); + (gdb) call pgd_offset_proc(vma->vm_mm, address) + $22 = (pgd_t *) 0x80a548c That's pretty bogus. Page tables aren't supposed to be in process - text or data areas. Let's see what's in the vma: + text or data areas. Let's see what's in the vma:: (gdb) p *vma @@ -3325,12 +3187,9 @@ - - This also pretty bogus. With all of the 0x80xxxxx and 0xaffffxxx addresses, this is looking like a stack was plonked down on top of - these structures. Maybe it's a stack overflow from the next page: - + these structures. Maybe it's a stack overflow from the next page:: (gdb) p vma @@ -3338,52 +3197,36 @@ - - That's towards the lower quarter of the page, so that would have to - have been pretty heavy stack overflow: - - - - - - - - - - - - - - - (gdb) x/100x $25 - 0x507d2434: 0x507d2434 0x00000000 0x08048000 0x080a4f8c - 0x507d2444: 0x00000000 0x080a79e0 0x080a8c94 0x080d1000 - 0x507d2454: 0xaffffdb0 0xaffffe63 0xaffffe7a 0xaffffe7a - 0x507d2464: 0xafffffec 0x00000062 0x0000008a 0x00000000 - 0x507d2474: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d2484: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d2494: 0x00000000 0x00000000 0x507d2fe0 0x00000000 - 0x507d24a4: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d24b4: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d24c4: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d24d4: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d24e4: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d24f4: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d2504: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d2514: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d2524: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d2534: 0x00000000 0x00000000 0x507d25dc 0x00000000 - 0x507d2544: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d2554: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d2564: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d2574: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d2584: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d2594: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d25a4: 0x00000000 0x00000000 0x00000000 0x00000000 - 0x507d25b4: 0x00000000 0x00000000 0x00000000 0x00000000 - - + have been pretty heavy stack overflow:: + + + (gdb) x/100x $25 + 0x507d2434: 0x507d2434 0x00000000 0x08048000 0x080a4f8c + 0x507d2444: 0x00000000 0x080a79e0 0x080a8c94 0x080d1000 + 0x507d2454: 0xaffffdb0 0xaffffe63 0xaffffe7a 0xaffffe7a + 0x507d2464: 0xafffffec 0x00000062 0x0000008a 0x00000000 + 0x507d2474: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d2484: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d2494: 0x00000000 0x00000000 0x507d2fe0 0x00000000 + 0x507d24a4: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d24b4: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d24c4: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d24d4: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d24e4: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d24f4: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d2504: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d2514: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d2524: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d2534: 0x00000000 0x00000000 0x507d25dc 0x00000000 + 0x507d2544: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d2554: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d2564: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d2574: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d2584: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d2594: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d25a4: 0x00000000 0x00000000 0x00000000 0x00000000 + 0x507d25b4: 0x00000000 0x00000000 0x00000000 0x00000000 @@ -3399,65 +3242,53 @@ on will be somewhat clearer. - 12.2. Episode 2: The case of the hung fsck +12.2. Episode 2: The case of the hung fsck +------------------------------------------- After setting a trap in the SEGV handler for accesses to the signal thread's stack, I reran the kernel. - fsck hung again, this time by hitting the trap: - - + fsck hung again, this time by hitting the trap:: + Setting hostname uml [ OK ] + Checking root filesystem + /dev/fhd0 contains a file system with errors, check forced. + Error reading block 86894 (Attempt to read block from filesystem resulted in short read) while reading indirect blocks of inode 19780. + /dev/fhd0: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY. + (i.e., without -a or -p options) + [ FAILED ] + *** An error occurred during the file system check. + *** Dropping you to a shell; the system will reboot + *** when you leave the shell. + Give root password for maintenance + (or type Control-D for normal startup): + [root@uml /root]# fsck -y /dev/fhd0 + fsck -y /dev/fhd0 + Parallelizing fsck version 1.14 (9-Jan-1999) + e2fsck 1.14, 9-Jan-1999 for EXT2 FS 0.5b, 95/08/09 + /dev/fhd0 contains a file system with errors, check forced. + Pass 1: Checking inodes, blocks, and sizes + Error reading block 86894 (Attempt to read block from filesystem resulted in short read) while reading indirect blocks of inode 19780. Ignore error? yes + Pass 2: Checking directory structure + Error reading block 49405 (Attempt to read block from filesystem resulted in short read). Ignore error? yes + Directory inode 11858, block 0, offset 0: directory corrupted + Salvage? yes + Missing '.' in directory inode 11858. + Fix? yes + Missing '..' in directory inode 11858. + Fix? yes - - - - Setting hostname uml [ OK ] - Checking root filesystem - /dev/fhd0 contains a file system with errors, check forced. - Error reading block 86894 (Attempt to read block from filesystem resulted in short read) while reading indirect blocks of inode 19780. - - /dev/fhd0: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY. - (i.e., without -a or -p options) - [ FAILED ] - - *** An error occurred during the file system check. - *** Dropping you to a shell; the system will reboot - *** when you leave the shell. - Give root password for maintenance - (or type Control-D for normal startup): - - [root@uml /root]# fsck -y /dev/fhd0 - fsck -y /dev/fhd0 - Parallelizing fsck version 1.14 (9-Jan-1999) - e2fsck 1.14, 9-Jan-1999 for EXT2 FS 0.5b, 95/08/09 - /dev/fhd0 contains a file system with errors, check forced. - Pass 1: Checking inodes, blocks, and sizes - Error reading block 86894 (Attempt to read block from filesystem resulted in short read) while reading indirect blocks of inode 19780. Ignore error? yes - - Pass 2: Checking directory structure - Error reading block 49405 (Attempt to read block from filesystem resulted in short read). Ignore error? yes - - Directory inode 11858, block 0, offset 0: directory corrupted - Salvage? yes - - Missing '.' in directory inode 11858. - Fix? yes - - Missing '..' in directory inode 11858. - Fix? yes - - Untested (4127) [100fe44c]: trap_kern.c line 31 + Untested (4127) [100fe44c]: trap_kern.c line 31 @@ -3465,7 +3296,7 @@ I need to get the signal thread to detach from pid 4127 so that I can attach to it with gdb. This is done by sending it a SIGUSR1, which is - caught by the signal thread, which detaches the process: + caught by the signal thread, which detaches the process:: kill -USR1 4127 @@ -3474,31 +3305,20 @@ - Now I can run gdb on it: - - - - - - - + Now I can run gdb on it:: - - - - - ~/linux/2.3.26/um 1034: gdb linux - GNU gdb 4.17.0.11 with Linux support - Copyright 1998 Free Software Foundation, Inc. - GDB is free software, covered by the GNU General Public License, and you are - welcome to change it and/or distribute copies of it under certain conditions. - Type "show copying" to see the conditions. - There is absolutely no warranty for GDB. Type "show warranty" for details. - This GDB was configured as "i386-redhat-linux"... - (gdb) att 4127 - Attaching to program `/home/dike/linux/2.3.26/um/linux', Pid 4127 - 0x10075891 in __libc_nanosleep () + ~/linux/2.3.26/um 1034: gdb linux + GNU gdb 4.17.0.11 with Linux support + Copyright 1998 Free Software Foundation, Inc. + GDB is free software, covered by the GNU General Public License, and you are + welcome to change it and/or distribute copies of it under certain conditions. + Type "show copying" to see the conditions. + There is absolutely no warranty for GDB. Type "show warranty" for details. + This GDB was configured as "i386-redhat-linux"... + (gdb) att 4127 + Attaching to program `/home/dike/linux/2.3.26/um/linux', Pid 4127 + 0x10075891 in __libc_nanosleep () @@ -3506,7 +3326,7 @@ The backtrace shows that it was in a write and that the fault address (address in frame 3) is 0x50000800, which is right in the middle of - the signal thread's stack page: + the signal thread's stack page:: (gdb) bt @@ -3540,58 +3360,48 @@ - - Going up the stack to the segv_handler frame and looking at where in the code the access happened shows that it happened near line 110 of - block_dev.c: - - - - - - - - - - (gdb) up - #1 0x1007584d in __sleep (seconds=1000000) - at ../sysdeps/unix/sysv/linux/sleep.c:78 - ../sysdeps/unix/sysv/linux/sleep.c:78: No such file or directory. - (gdb) - #2 0x1006ce9a in stop () at user_util.c:191 - 191 while(1) sleep(1000000); - (gdb) - #3 0x1006bf88 in segv (address=1342179328, is_write=2) at trap_kern.c:31 - 31 KERN_UNTESTED(); - (gdb) - #4 0x1006c628 in segv_handler (sc=0x5006eaf8) at trap_user.c:174 - 174 segv(sc->cr2, sc->err & 2); - (gdb) p *sc - $1 = {gs = 0, __gsh = 0, fs = 0, __fsh = 0, es = 43, __esh = 0, ds = 43, - __dsh = 0, edi = 1342179328, esi = 134973440, ebp = 1342631484, - esp = 1342630864, ebx = 256, edx = 0, ecx = 256, eax = 1024, trapno = 14, - err = 6, eip = 268550834, cs = 35, __csh = 0, eflags = 66070, - esp_at_signal = 1342630864, ss = 43, __ssh = 0, fpstate = 0x0, oldmask = 0, - cr2 = 1342179328} - (gdb) p (void *)268550834 - $2 = (void *) 0x1001c2b2 - (gdb) i sym $2 - block_write + 1090 in section .text - (gdb) i line *$2 - Line 209 of "/home/dike/linux/2.3.26/um/include/asm/arch/string.h" - starts at address 0x1001c2a1 <block_write+1073> - and ends at 0x1001c2bf <block_write+1103>. - (gdb) i line *0x1001c2c0 - Line 110 of "block_dev.c" starts at address 0x1001c2bf <block_write+1103> - and ends at 0x1001c2e3 <block_write+1139>. - - + block_dev.c:: + + + + (gdb) up + #1 0x1007584d in __sleep (seconds=1000000) + at ../sysdeps/unix/sysv/linux/sleep.c:78 + ../sysdeps/unix/sysv/linux/sleep.c:78: No such file or directory. + (gdb) + #2 0x1006ce9a in stop () at user_util.c:191 + 191 while(1) sleep(1000000); + (gdb) + #3 0x1006bf88 in segv (address=1342179328, is_write=2) at trap_kern.c:31 + 31 KERN_UNTESTED(); + (gdb) + #4 0x1006c628 in segv_handler (sc=0x5006eaf8) at trap_user.c:174 + 174 segv(sc->cr2, sc->err & 2); + (gdb) p *sc + $1 = {gs = 0, __gsh = 0, fs = 0, __fsh = 0, es = 43, __esh = 0, ds = 43, + __dsh = 0, edi = 1342179328, esi = 134973440, ebp = 1342631484, + esp = 1342630864, ebx = 256, edx = 0, ecx = 256, eax = 1024, trapno = 14, + err = 6, eip = 268550834, cs = 35, __csh = 0, eflags = 66070, + esp_at_signal = 1342630864, ss = 43, __ssh = 0, fpstate = 0x0, oldmask = 0, + cr2 = 1342179328} + (gdb) p (void *)268550834 + $2 = (void *) 0x1001c2b2 + (gdb) i sym $2 + block_write + 1090 in section .text + (gdb) i line *$2 + Line 209 of "/home/dike/linux/2.3.26/um/include/asm/arch/string.h" + starts at address 0x1001c2a1 <block_write+1073> + and ends at 0x1001c2bf <block_write+1103>. + (gdb) i line *0x1001c2c0 + Line 110 of "block_dev.c" starts at address 0x1001c2bf <block_write+1103> + and ends at 0x1001c2e3 <block_write+1139>. Looking at the source shows that the fault happened during a call to - copy_from_user to copy the data into the kernel: + copy_from_user to copy the data into the kernel:: 107 count -= chars; @@ -3601,10 +3411,8 @@ - - p is the pointer which must contain 0x50000800, since buf contains - 0x80b8800 (frame 8 above). It is defined as: + 0x80b8800 (frame 8 above). It is defined as:: p = offset + bh->b_data; @@ -3615,24 +3423,22 @@ I need to figure out what bh is, and it just so happens that bh is passed as an argument to mark_buffer_uptodate and mark_buffer_dirty a - few lines later, so I do a little disassembly: - - + few lines later, so I do a little disassembly:: - (gdb) disas 0x1001c2bf 0x1001c2e0 - Dump of assembler code from 0x1001c2bf to 0x1001c2d0: - 0x1001c2bf <block_write+1103>: addl %eax,0xc(%ebp) - 0x1001c2c2 <block_write+1106>: movl 0xfffffdd4(%ebp),%edx - 0x1001c2c8 <block_write+1112>: btsl $0x0,0x18(%edx) - 0x1001c2cd <block_write+1117>: btsl $0x1,0x18(%edx) - 0x1001c2d2 <block_write+1122>: sbbl %ecx,%ecx - 0x1001c2d4 <block_write+1124>: testl %ecx,%ecx - 0x1001c2d6 <block_write+1126>: jne 0x1001c2e3 <block_write+1139> - 0x1001c2d8 <block_write+1128>: pushl $0x0 - 0x1001c2da <block_write+1130>: pushl %edx - 0x1001c2db <block_write+1131>: call 0x1001819c <__mark_buffer_dirty> - End of assembler dump. + (gdb) disas 0x1001c2bf 0x1001c2e0 + Dump of assembler code from 0x1001c2bf to 0x1001c2d0: + 0x1001c2bf <block_write+1103>: addl %eax,0xc(%ebp) + 0x1001c2c2 <block_write+1106>: movl 0xfffffdd4(%ebp),%edx + 0x1001c2c8 <block_write+1112>: btsl $0x0,0x18(%edx) + 0x1001c2cd <block_write+1117>: btsl $0x1,0x18(%edx) + 0x1001c2d2 <block_write+1122>: sbbl %ecx,%ecx + 0x1001c2d4 <block_write+1124>: testl %ecx,%ecx + 0x1001c2d6 <block_write+1126>: jne 0x1001c2e3 <block_write+1139> + 0x1001c2d8 <block_write+1128>: pushl $0x0 + 0x1001c2da <block_write+1130>: pushl %edx + 0x1001c2db <block_write+1131>: call 0x1001819c <__mark_buffer_dirty> + End of assembler dump. @@ -3640,7 +3446,7 @@ At that point, bh is in %edx (address 0x1001c2da), which is calculated at 0x1001c2c2 as %ebp + 0xfffffdd4, so I figure exactly what that is, - taking %ebp from the sigcontext_struct above: + taking %ebp from the sigcontext_struct above:: (gdb) p (void *)1342631484 @@ -3657,7 +3463,7 @@ Now, I look at the structure to see what's in it, and particularly, - what its b_data field contains: + what its b_data field contains:: (gdb) p *((struct buffer_head *)0x50100200) @@ -3682,18 +3488,18 @@ The b_page field is a pointer to the page_struct representing the 0x50000000 page. Looking at it shows the kernel's idea of the state - of that page: + of that page:: - (gdb) p *$13.b_page - $17 = {list = {next = 0x50004a5c, prev = 0x100c5174}, mapping = 0x0, - index = 0, next_hash = 0x0, count = {counter = 1}, flags = 132, lru = { - next = 0x50008460, prev = 0x50019350}, wait = { - lock = <optimized out or zero length>, task_list = {next = 0x50004024, - prev = 0x50004024}, __magic = 1342193708, __creator = 0}, - pprev_hash = 0x0, buffers = 0x501002c0, virtual = 1342177280, - zone = 0x100c5160} + (gdb) p *$13.b_page + $17 = {list = {next = 0x50004a5c, prev = 0x100c5174}, mapping = 0x0, + index = 0, next_hash = 0x0, count = {counter = 1}, flags = 132, lru = { + next = 0x50008460, prev = 0x50019350}, wait = { + lock = <optimized out or zero length>, task_list = {next = 0x50004024, + prev = 0x50004024}, __magic = 1342193708, __creator = 0}, + pprev_hash = 0x0, buffers = 0x501002c0, virtual = 1342177280, + zone = 0x100c5160} @@ -3702,7 +3508,7 @@ Some sanity-checking: the virtual field shows the "virtual" address of this page, which in this kernel is the same as its "physical" address, and the page_struct itself should be mem_map[0], since it represents - the first page of memory: + the first page of memory:: @@ -3719,7 +3525,7 @@ Now to check out the page_struct itself. In particular, the flags - field shows whether the page is considered free or not: + field shows whether the page is considered free or not:: (gdb) p (void *)132 @@ -3739,7 +3545,7 @@ In my setup_arch procedure, I have the following code which looks just - fine: + fine:: @@ -3762,7 +3568,7 @@ Stepping into init_bootmem, and looking at bootmem_map before looking - at what it contains shows the following: + at what it contains shows the following:: @@ -3788,18 +3594,20 @@ - 13. What to do when UML doesn't work +13. What to do when UML doesn't work +===================================== - 13.1. Strange compilation errors when you build from source +13.1. Strange compilation errors when you build from source +------------------------------------------------------------ As of test11, it is necessary to have "ARCH=um" in the environment or on the make command line for all steps in building UML, including clean, distclean, or mrproper, config, menuconfig, or xconfig, dep, and linux. If you forget for any of them, the i386 build seems to - contaminate the UML build. If this happens, start from scratch with + contaminate the UML build. If this happens, start from scratch with:: host% @@ -3811,7 +3619,7 @@ and repeat the build process with ARCH=um on all the steps. - See ``Compiling the kernel and modules'' for more details. + See :ref:`Compiling_the_kernel_and_modules` for more details. Another cause of strange compilation errors is building UML in @@ -3824,11 +3632,11 @@ - 13.3. A variety of panics and hangs with /tmp on a reiserfs filesys- - tem +13.3. A variety of panics and hangs with /tmp on a reiserfs filesystem +----------------------------------------------------------------------- I saw this on reiserfs 3.5.21 and it seems to be fixed in 3.5.27. - Panics preceded by + Panics preceded by:: Detaching pid nnnn @@ -3854,17 +3662,19 @@ - 13.5. UML doesn't work when /tmp is an NFS filesystem +13.5. UML doesn't work when /tmp is an NFS filesystem +------------------------------------------------------ This seems to be a similar situation with the ReiserFS problem above. Some versions of NFS seems not to handle mmap correctly, which UML depends on. The workaround is have /tmp be a non-NFS directory. - 13.6. UML hangs on boot when compiled with gprof support +13.6. UML hangs on boot when compiled with gprof support +--------------------------------------------------------- If you build UML with gprof support and, early in the boot, it does - this + this:: kernel BUG at page_alloc.c:100! @@ -3878,10 +3688,11 @@ - 13.7. syslogd dies with a SIGTERM on startup +13.7. syslogd dies with a SIGTERM on startup +--------------------------------------------- The exact boot error depends on the distribution that you're booting, - but Debian produces this: + but Debian produces this:: /etc/rc2.d/S10sysklogd: line 49: 93 Terminated @@ -3891,23 +3702,21 @@ This is a syslogd bug. There's a race between a parent process - installing a signal handler and its child sending the signal. See - this uml-devel post <http://www.geocrawler.com/lists/3/Source- - Forge/709/0/6612801> for the details. + installing a signal handler and its child sending the signal. - 13.8. TUN/TAP networking doesn't work on a 2.4 host +13.8. TUN/TAP networking doesn't work on a 2.4 host +---------------------------------------------------- - There are a couple of problems which were - <http://www.geocrawler.com/lists/3/SourceForge/597/0/> name="pointed - out"> by Tim Robinson <timro at trkr dot net> + There are a couple of problems which were reported by + Tim Robinson <timro at trkr dot net> - o It doesn't work on hosts running 2.4.7 (or thereabouts) or earlier. + - It doesn't work on hosts running 2.4.7 (or thereabouts) or earlier. The fix is to upgrade to something more recent and then read the next item. - o If you see + - If you see:: File descriptor in bad state @@ -3921,8 +3730,8 @@ - 13.9. You can network to the host but not to other machines on the - net +13.9. You can network to the host but not to other machines on the net +======================================================================= If you can connect to the host, and the host can connect to UML, but you cannot connect to any other machines, then you may need to enable @@ -3930,7 +3739,7 @@ using private IP addresses (192.168.x.x or 10.x.x.x) for host/UML networking, rather than the public address space that your host is connected to. UML does not enable IP Masquerading, so you will need - to create a static rule to enable it: + to create a static rule to enable it:: host% @@ -3944,11 +3753,11 @@ Documentation on IP Masquerading, and SNAT, can be found at - www.netfilter.org <http://www.netfilter.org> . + http://www.netfilter.org. If you can reach the local net, but not the outside Internet, then - that is usually a routing problem. The UML needs a default route: + that is usually a routing problem. The UML needs a default route:: UML# @@ -3972,7 +3781,8 @@ - 13.10. I have no root and I want to scream +13.10. I have no root and I want to scream +=========================================== Thanks to Birgit Wahlich for telling me about this strange one. It turns out that there's a limit of six environment variables on the @@ -3987,14 +3797,16 @@ - 13.11. UML build conflict between ptrace.h and ucontext.h +13.11. UML build conflict between ptrace.h and ucontext.h +========================================================== On some older systems, /usr/include/asm/ptrace.h and /usr/include/sys/ucontext.h define the same names. So, when they're included together, the defines from one completely mess up the parsing - of the other, producing errors like: + of the other, producing errors like:: + /usr/include/sys/ucontext.h:47: parse error before - `10' + `10` @@ -4007,7 +3819,8 @@ - 13.12. The UML BogoMips is exactly half the host's BogoMips +13.12. The UML BogoMips is exactly half the host's BogoMips +------------------------------------------------------------ On i386 kernels, there are two ways of running the loop that is used to calculate the BogoMips rating, using the TSC if it's there or using @@ -4019,15 +3832,17 @@ - 13.13. When you run UML, it immediately segfaults +13.13. When you run UML, it immediately segfaults +-------------------------------------------------- If the host is configured with the 2G/2G address space split, that's - why. See ``UML on 2G/2G hosts'' for the details on getting UML to + why. See ref:`UML_on_2G/2G_hosts` for the details on getting UML to run on your host. - 13.14. xterms appear, then immediately disappear +13.14. xterms appear, then immediately disappear +------------------------------------------------- If you're running an up to date kernel with an old release of uml_utilities, the port-helper program will not work properly, so @@ -4039,7 +3854,8 @@ - 13.15. Any other panic, hang, or strange behavior +13.15. Any other panic, hang, or strange behavior +-------------------------------------------------- If you're seeing truly strange behavior, such as hangs or panics that happen in random places, or you try running the debugger to see what's @@ -4057,9 +3873,13 @@ it and that a fix is imminent. - If you want to be super-helpful, read ``Diagnosing Problems'' and + If you want to be super-helpful, read :ref:`Diagnosing_Problems` and follow the instructions contained therein. - 14. Diagnosing Problems + +.. _Diagnosing_Problems: + +14. Diagnosing Problems +======================== If you get UML to crash, hang, or otherwise misbehave, you should @@ -4074,21 +3894,22 @@ For any diagnosis, you're going to need to build a debugging kernel. The binaries from this site aren't debuggable. If you haven't done - this before, read about ``Compiling the kernel and modules'' and - ``Kernel debugging'' UML first. + this before, read about :ref:`Compiling_the_kernel_and_modules` and + :ref:`Kernel_debugging` UML first. - 14.1. Case 1 : Normal kernel panics +14.1. Case 1 : Normal kernel panics +------------------------------------ The most common case is for a normal thread to panic. To debug this, you will need to run it under the debugger (add 'debug' to the command line). An xterm will start up with gdb running inside it. Continue - it when it stops in start_kernel and make it crash. Now ^C gdb and + it when it stops in start_kernel and make it crash. Now ``^C gdb`` and If the panic was a "Kernel mode fault", then there will be a segv frame on the stack and I'm going to want some more information. The - stack might look something like this: + stack might look something like this:: (UML gdb) backtrace @@ -4107,7 +3928,7 @@ I'm going to want to see the symbol and line information for the value - of ip in the segv frame. In this case, you would do the following: + of ip in the segv frame. In this case, you would do the following:: (UML gdb) i sym 268849158 @@ -4115,7 +3936,7 @@ - and + and:: (UML gdb) i line *268849158 @@ -4128,7 +3949,8 @@ to get that information from the faulting ip. - 14.2. Case 2 : Tracing thread panics +14.2. Case 2 : Tracing thread panics +------------------------------------- The less common and more painful case is when the tracing thread panics. In this case, the kernel debugger will be useless because it @@ -4136,7 +3958,7 @@ do is get a backtrace from the tracing thread. This is done by figuring out what its pid is, firing up gdb, and attaching it to that pid. You can figure out the tracing thread pid by looking at the - first line of the console output, which will look like this: + first line of the console output, which will look like this:: tracing thread pid = 15851 @@ -4145,7 +3967,7 @@ or by running ps on the host and finding the line that looks like - this: + this:: jdike 15851 4.5 0.4 132568 1104 pts/0 S 21:34 0:05 ./linux [(tracing thread)] @@ -4164,7 +3986,7 @@ 14.3. Case 3 : Tracing thread panics caused by other threads However, there are cases where the misbehavior of another thread - caused the problem. The most common panic of this type is: + caused the problem. The most common panic of this type is:: wait_for_stop failed to wait for <pid> to stop with <signal number> @@ -4177,7 +3999,7 @@ debugger is defunct and without some fancy footwork, another gdb can't attach to it. So, this is how the fancy footwork goes: - In a shell: + In a shell:: host% kill -STOP pid @@ -4185,7 +4007,7 @@ - Run gdb on the tracing thread as described in case 2 and do: + Run gdb on the tracing thread as described in case 2 and do:: (host gdb) call detach(pid) @@ -4193,7 +4015,7 @@ If you get a segfault, do it again. It always works the second time. - Detach from the tracing thread and attach to that other thread: + Detach from the tracing thread and attach to that other thread:: (host gdb) detach @@ -4209,7 +4031,7 @@ If gdb hangs when attaching to that process, go back to a shell and - do: + do:: host% @@ -4218,7 +4040,7 @@ - And then get the backtrace: + And then get the backtrace:: (host gdb) backtrace @@ -4227,13 +4049,14 @@ - 14.4. Case 4 : Hangs +14.4. Case 4 : Hangs +--------------------- Hangs seem to be fairly rare, but they sometimes happen. When a hang happens, we need a backtrace from the offending process. Run the kernel debugger as described in case 1 and get a backtrace. If the current process is not the idle thread, then send in the backtrace. - You can tell that it's the idle thread if the stack looks like this: + You can tell that it's the idle thread if the stack looks like this:: #0 0x100b1401 in __libc_nanosleep () @@ -4257,7 +4080,8 @@ - 15. Thanks +15. Thanks +=========== A number of people have helped this project in various ways, and this @@ -4274,20 +4098,21 @@ bookkeeping lapses and I forget about contributions. - 15.1. Code and Documentation +15.1. Code and Documentation +----------------------------- Rusty Russell <rusty at linuxcare.com.au> - - o wrote the HOWTO <http://user-mode- - linux.sourceforge.net/UserModeLinux-HOWTO.html> + - wrote the HOWTO + http://user-mode-linux.sourceforge.net/old/UserModeLinux-HOWTO.html - o prodded me into making this project official and putting it on + - prodded me into making this project official and putting it on SourceForge - o came up with the way cool UML logo <http://user-mode- - linux.sourceforge.net/uml-small.png> + - came up with the way cool UML logo + http://user-mode-linux.sourceforge.net/uml-small.png - o redid the config process + - redid the config process Peter Moulder <reiter at netspace.net.au> - Fixed my config and build @@ -4296,34 +4121,32 @@ Bill Stearns <wstearns at pobox.com> - - o HOWTO updates + - HOWTO updates - o lots of bug reports + - lots of bug reports - o lots of testing + - lots of testing - o dedicated a box (uml.ists.dartmouth.edu) to support UML development + - dedicated a box (uml.ists.dartmouth.edu) to support UML development - o wrote the mkrootfs script, which allows bootable filesystems of + - wrote the mkrootfs script, which allows bootable filesystems of RPM-based distributions to be cranked out - o cranked out a large number of filesystems with said script + - cranked out a large number of filesystems with said script Jim Leu <jleu at mindspring.com> - Wrote the virtual ethernet driver and associated usermode tools - Lars Brinkhoff <http://lars.nocrew.org/> - Contributed the ptrace - proxy from his own project <http://a386.nocrew.org/> to allow easier - kernel debugging + Lars Brinkhoff http://lars.nocrew.org/ - Contributed the ptrace + proxy from his own project to allow easier kernel debugging Andrea Arcangeli <andrea at suse.de> - Redid some of the early boot code so that it would work on machines with Large File Support - Chris Emerson <http://www.chiark.greenend.org.uk/~cemerson/> - Did - the first UML port to Linux/ppc + Chris Emerson - Did the first UML port to Linux/ppc Harald Welte <laforge at gnumonks.org> - Wrote the multicast @@ -4338,7 +4161,7 @@ wrote the iomem emulation support - Henrik Nordstrom <http://hem.passagen.se/hno/> - Provided a variety + Henrik Nordstrom http://hem.passagen.se/hno/ - Provided a variety of patches, fixes, and clues @@ -4373,190 +4196,193 @@ submitted patches for the slip transport and lots of other things. - David Coulson <http://davidcoulson.net> - + David Coulson http://davidcoulson.net - - o Set up the usermodelinux.org <http://usermodelinux.org> site, + - Set up the http://usermodelinux.org site, which is a great way of keeping the UML user community on top of UML goings-on. - o Site documentation and updates + - Site documentation and updates - o Nifty little UML management daemon UMLd - <http://uml.openconsultancy.com/umld/> + - Nifty little UML management daemon UMLd - o Lots of testing and bug reports + - Lots of testing and bug reports - 15.2. Flushing out bugs +15.2. Flushing out bugs +------------------------ - o Yuri Pudgorodsky + - Yuri Pudgorodsky - o Gerald Britton + - Gerald Britton - o Ian Wehrman + - Ian Wehrman - o Gord Lamb + - Gord Lamb - o Eugene Koontz + - Eugene Koontz - o John H. Hartman + - John H. Hartman - o Anders Karlsson + - Anders Karlsson - o Daniel Phillips + - Daniel Phillips - o John Fremlin + - John Fremlin - o Rainer Burgstaller + - Rainer Burgstaller - o James Stevenson + - James Stevenson - o Matt Clay + - Matt Clay - o Cliff Jefferies + - Cliff Jefferies - o Geoff Hoff + - Geoff Hoff - o Lennert Buytenhek + - Lennert Buytenhek - o Al Viro + - Al Viro - o Frank Klingenhoefer + - Frank Klingenhoefer - o Livio Baldini Soares + - Livio Baldini Soares - o Jon Burgess + - Jon Burgess - o Petru Paler + - Petru Paler - o Paul + - Paul - o Chris Reahard + - Chris Reahard - o Sverker Nilsson + - Sverker Nilsson - o Gong Su + - Gong Su - o johan verrept + - johan verrept - o Bjorn Eriksson + - Bjorn Eriksson - o Lorenzo Allegrucci + - Lorenzo Allegrucci - o Muli Ben-Yehuda + - Muli Ben-Yehuda - o David Mansfield + - David Mansfield - o Howard Goff + - Howard Goff - o Mike Anderson + - Mike Anderson - o John Byrne + - John Byrne - o Sapan J. Batia + - Sapan J. Batia - o Iris Huang + - Iris Huang - o Jan Hudec + - Jan Hudec - o Voluspa + - Voluspa - 15.3. Buglets and clean-ups +15.3. Buglets and clean-ups +---------------------------- - o Dave Zarzycki + - Dave Zarzycki - o Adam Lazur + - Adam Lazur - o Boria Feigin + - Boria Feigin - o Brian J. Murrell + - Brian J. Murrell - o JS + - JS - o Roman Zippel + - Roman Zippel - o Wil Cooley + - Wil Cooley - o Ayelet Shemesh + - Ayelet Shemesh - o Will Dyson + - Will Dyson - o Sverker Nilsson + - Sverker Nilsson - o dvorak + - dvorak - o v.naga srinivas + - v.naga srinivas - o Shlomi Fish + - Shlomi Fish - o Roger Binns + - Roger Binns - o johan verrept + - johan verrept - o MrChuoi + - MrChuoi - o Peter Cleve + - Peter Cleve - o Vincent Guffens + - Vincent Guffens - o Nathan Scott + - Nathan Scott - o Patrick Caulfield + - Patrick Caulfield - o jbearce + - jbearce - o Catalin Marinas + - Catalin Marinas - o Shane Spencer + - Shane Spencer - o Zou Min + - Zou Min - o Ryan Boder + - Ryan Boder - o Lorenzo Colitti + - Lorenzo Colitti - o Gwendal Grignou + - Gwendal Grignou - o Andre' Breiler + - Andre' Breiler - o Tsutomu Yasuda + - Tsutomu Yasuda - 15.4. Case Studies +15.4. Case Studies +------------------- - o Jon Wright + - Jon Wright - o William McEwan + - William McEwan - o Michael Richardson + - Michael Richardson - 15.5. Other contributions +15.5. Other contributions +-------------------------- Bill Carr <Bill.Carr at compaq.com> made the Red Hat mkrootfs script work with RH 6.2. Michael Jennings <mikejen at hevanet.com> sent in some material which - is now gracing the top of the index page <http://user-mode- - linux.sourceforge.net/> of this site. + is now gracing the top of the index page + http://user-mode-linux.sourceforge.net/ of this site. - SGI <http://www.sgi.com> (and more specifically Ralf Baechle <ralf at - uni-koblenz.de> ) gave me an account on oss.sgi.com - <http://www.oss.sgi.com> . The bandwidth there made it possible to + SGI (and more specifically Ralf Baechle <ralf at + uni-koblenz.de> ) gave me an account on oss.sgi.com. + The bandwidth there made it possible to produce most of the filesystems available on the project download page. @@ -4573,17 +4399,5 @@ Chris Reahard built a specialized root filesystem for running a DNS server jailed inside UML. It's available from the download - <http://user-mode-linux.sourceforge.net/dl-sf.html> page in the Jail + http://user-mode-linux.sourceforge.net/old/dl-sf.html page in the Jail Filesystems section. - - - - - - - - - - - - diff --git a/MAINTAINERS b/MAINTAINERS index 81ebfc86f10d..05f566eba2a6 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2796,11 +2796,11 @@ F: drivers/block/aoe/ ATHEROS 71XX/9XXX GPIO DRIVER M: Alban Bedel <albeu@free.fr> +S: Maintained W: https://github.com/AlbanBedel/linux T: git git://github.com/AlbanBedel/linux -S: Maintained -F: drivers/gpio/gpio-ath79.c F: Documentation/devicetree/bindings/gpio/gpio-ath79.txt +F: drivers/gpio/gpio-ath79.c ATHEROS 71XX/9XXX USB PHY DRIVER M: Alban Bedel <albeu@free.fr> @@ -3422,8 +3422,8 @@ BROADCOM BRCMSTB GPIO DRIVER M: Gregory Fong <gregory.0xf0@gmail.com> L: bcm-kernel-feedback-list@broadcom.com S: Supported -F: drivers/gpio/gpio-brcmstb.c F: Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt +F: drivers/gpio/gpio-brcmstb.c BROADCOM BRCMSTB I2C DRIVER M: Kamal Dasu <kdasu.kdev@gmail.com> @@ -3481,8 +3481,8 @@ BROADCOM KONA GPIO DRIVER M: Ray Jui <rjui@broadcom.com> L: bcm-kernel-feedback-list@broadcom.com S: Supported -F: drivers/gpio/gpio-bcm-kona.c F: Documentation/devicetree/bindings/gpio/brcm,kona-gpio.txt +F: drivers/gpio/gpio-bcm-kona.c BROADCOM NETXTREME-E ROCE DRIVER M: Selvin Xavier <selvin.xavier@broadcom.com> @@ -3597,8 +3597,8 @@ F: sound/pci/bt87x.c BT8XXGPIO DRIVER M: Michael Buesch <m@bues.ch> -W: http://bu3sch.de/btgpio.php S: Maintained +W: http://bu3sch.de/btgpio.php F: drivers/gpio/gpio-bt8xx.c BTRFS FILE SYSTEM @@ -7143,18 +7143,18 @@ GPIO SUBSYSTEM M: Linus Walleij <linus.walleij@linaro.org> M: Bartosz Golaszewski <bgolaszewski@baylibre.com> L: linux-gpio@vger.kernel.org -T: git git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git S: Maintained +T: git git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git +F: Documentation/ABI/obsolete/sysfs-gpio +F: Documentation/ABI/testing/gpio-cdev +F: Documentation/admin-guide/gpio/ F: Documentation/devicetree/bindings/gpio/ F: Documentation/driver-api/gpio/ -F: Documentation/admin-guide/gpio/ -F: Documentation/ABI/testing/gpio-cdev -F: Documentation/ABI/obsolete/sysfs-gpio F: drivers/gpio/ +F: include/asm-generic/gpio.h F: include/linux/gpio/ F: include/linux/gpio.h F: include/linux/of_gpio.h -F: include/asm-generic/gpio.h F: include/uapi/linux/gpio.h F: tools/gpio/ @@ -8055,8 +8055,8 @@ F: drivers/scsi/ips.* ICH LPC AND GPIO DRIVER M: Peter Tyser <ptyser@xes-inc.com> S: Maintained -F: drivers/mfd/lpc_ich.c F: drivers/gpio/gpio-ich.c +F: drivers/mfd/lpc_ich.c ICY I2C DRIVER M: Max Staudt <max@enpas.org> @@ -16075,8 +16075,8 @@ F: Documentation/devicetree/bindings/reset/snps,axs10x-reset.txt SYNOPSYS CREG GPIO DRIVER M: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> S: Maintained -F: drivers/gpio/gpio-creg-snps.c F: Documentation/devicetree/bindings/gpio/snps,creg-gpio.txt +F: drivers/gpio/gpio-creg-snps.c SYNOPSYS DESIGNWARE 8250 UART DRIVER R: Andy Shevchenko <andriy.shevchenko@linux.intel.com> @@ -16087,8 +16087,8 @@ SYNOPSYS DESIGNWARE APB GPIO DRIVER M: Hoan Tran <hoan@os.amperecomputing.com> L: linux-gpio@vger.kernel.org S: Maintained -F: drivers/gpio/gpio-dwapb.c F: Documentation/devicetree/bindings/gpio/snps-dwapb-gpio.txt +F: drivers/gpio/gpio-dwapb.c SYNOPSYS DESIGNWARE AXI DMAC DRIVER M: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> @@ -18414,8 +18414,8 @@ M: Nandor Han <nandor.han@ge.com> M: Semi Malinen <semi.malinen@ge.com> L: linux-gpio@vger.kernel.org S: Maintained -F: drivers/gpio/gpio-xra1403.c F: Documentation/devicetree/bindings/gpio/gpio-xra1403.txt +F: drivers/gpio/gpio-xra1403.c XTENSA XTFPGA PLATFORM SUPPORT M: Max Filippov <jcmvbkbc@gmail.com> @@ -2,7 +2,7 @@ VERSION = 5 PATCHLEVEL = 6 SUBLEVEL = 0 -EXTRAVERSION = -rc1 +EXTRAVERSION = -rc2 NAME = Kleptomaniac Octopus # *DOCUMENTATION* diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c index 2a5ff69c28e6..10499d44964a 100644 --- a/arch/arm/kernel/ftrace.c +++ b/arch/arm/kernel/ftrace.c @@ -78,13 +78,10 @@ static int ftrace_modify_code(unsigned long pc, unsigned long old, { unsigned long replaced; - if (IS_ENABLED(CONFIG_THUMB2_KERNEL)) { + if (IS_ENABLED(CONFIG_THUMB2_KERNEL)) old = __opcode_to_mem_thumb32(old); - new = __opcode_to_mem_thumb32(new); - } else { + else old = __opcode_to_mem_arm(old); - new = __opcode_to_mem_arm(new); - } if (validate) { if (probe_kernel_read(&replaced, (void *)pc, MCOUNT_INSN_SIZE)) diff --git a/arch/arm/kernel/patch.c b/arch/arm/kernel/patch.c index d0a05a3bdb96..e9e828b6bb30 100644 --- a/arch/arm/kernel/patch.c +++ b/arch/arm/kernel/patch.c @@ -16,10 +16,10 @@ struct patch { unsigned int insn; }; +#ifdef CONFIG_MMU static DEFINE_RAW_SPINLOCK(patch_lock); static void __kprobes *patch_map(void *addr, int fixmap, unsigned long *flags) - __acquires(&patch_lock) { unsigned int uintaddr = (uintptr_t) addr; bool module = !core_kernel_text(uintaddr); @@ -34,8 +34,6 @@ static void __kprobes *patch_map(void *addr, int fixmap, unsigned long *flags) if (flags) raw_spin_lock_irqsave(&patch_lock, *flags); - else - __acquire(&patch_lock); set_fixmap(fixmap, page_to_phys(page)); @@ -43,15 +41,19 @@ static void __kprobes *patch_map(void *addr, int fixmap, unsigned long *flags) } static void __kprobes patch_unmap(int fixmap, unsigned long *flags) - __releases(&patch_lock) { clear_fixmap(fixmap); if (flags) raw_spin_unlock_irqrestore(&patch_lock, *flags); - else - __release(&patch_lock); } +#else +static void __kprobes *patch_map(void *addr, int fixmap, unsigned long *flags) +{ + return addr; +} +static void __kprobes patch_unmap(int fixmap, unsigned long *flags) { } +#endif void __kprobes __patch_text_real(void *addr, unsigned int insn, bool remap) { @@ -64,8 +66,6 @@ void __kprobes __patch_text_real(void *addr, unsigned int insn, bool remap) if (remap) waddr = patch_map(addr, FIX_TEXT_POKE0, &flags); - else - __acquire(&patch_lock); if (thumb2 && __opcode_is_thumb16(insn)) { *(u16 *)waddr = __opcode_to_mem_thumb16(insn); @@ -102,8 +102,7 @@ void __kprobes __patch_text_real(void *addr, unsigned int insn, bool remap) if (waddr != addr) { flush_kernel_vmap_range(waddr, twopage ? size / 2 : size); patch_unmap(FIX_TEXT_POKE0, &flags); - } else - __release(&patch_lock); + } flush_icache_range((uintptr_t)(addr), (uintptr_t)(addr) + size); diff --git a/arch/arm64/include/asm/exception.h b/arch/arm64/include/asm/exception.h index b87c6e276ab1..7a6e81ca23a8 100644 --- a/arch/arm64/include/asm/exception.h +++ b/arch/arm64/include/asm/exception.h @@ -33,7 +33,6 @@ static inline u32 disr_to_esr(u64 disr) asmlinkage void enter_from_user_mode(void); void do_mem_abort(unsigned long addr, unsigned int esr, struct pt_regs *regs); -void do_sp_pc_abort(unsigned long addr, unsigned int esr, struct pt_regs *regs); void do_undefinstr(struct pt_regs *regs); asmlinkage void bad_mode(struct pt_regs *regs, int reason, unsigned int esr); void do_debug_exception(unsigned long addr_if_watchpoint, unsigned int esr, @@ -47,7 +46,4 @@ void bad_el0_sync(struct pt_regs *regs, int reason, unsigned int esr); void do_cp15instr(unsigned int esr, struct pt_regs *regs); void do_el0_svc(struct pt_regs *regs); void do_el0_svc_compat(struct pt_regs *regs); -void do_el0_ia_bp_hardening(unsigned long addr, unsigned int esr, - struct pt_regs *regs); - #endif /* __ASM_EXCEPTION_H */ diff --git a/arch/arm64/include/asm/spinlock.h b/arch/arm64/include/asm/spinlock.h index 102404dc1e13..9083d6992603 100644 --- a/arch/arm64/include/asm/spinlock.h +++ b/arch/arm64/include/asm/spinlock.h @@ -18,6 +18,10 @@ * See: * https://lore.kernel.org/lkml/20200110100612.GC2827@hirez.programming.kicks-ass.net */ -#define vcpu_is_preempted(cpu) false +#define vcpu_is_preempted vcpu_is_preempted +static inline bool vcpu_is_preempted(int cpu) +{ + return false; +} #endif /* __ASM_SPINLOCK_H */ diff --git a/arch/arm64/kernel/kaslr.c b/arch/arm64/kernel/kaslr.c index 53b8a4ee64ff..91a83104c6e8 100644 --- a/arch/arm64/kernel/kaslr.c +++ b/arch/arm64/kernel/kaslr.c @@ -11,6 +11,7 @@ #include <linux/sched.h> #include <linux/types.h> +#include <asm/archrandom.h> #include <asm/cacheflush.h> #include <asm/fixmap.h> #include <asm/kernel-pgtable.h> diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index bbb0f0c145f6..00626057a384 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -466,6 +466,13 @@ static void ssbs_thread_switch(struct task_struct *next) if (unlikely(next->flags & PF_KTHREAD)) return; + /* + * If all CPUs implement the SSBS extension, then we just need to + * context-switch the PSTATE field. + */ + if (cpu_have_feature(cpu_feature(SSBS))) + return; + /* If the mitigation is enabled, then we leave SSBS clear. */ if ((arm64_get_ssbd_state() == ARM64_SSBD_FORCE_ENABLE) || test_tsk_thread_flag(next, TIF_SSBD)) @@ -608,8 +615,6 @@ long get_tagged_addr_ctrl(void) * only prevents the tagged address ABI enabling via prctl() and does not * disable it for tasks that already opted in to the relaxed ABI. */ -static int zero; -static int one = 1; static struct ctl_table tagged_addr_sysctl_table[] = { { @@ -618,8 +623,8 @@ static struct ctl_table tagged_addr_sysctl_table[] = { .data = &tagged_addr_disabled, .maxlen = sizeof(int), .proc_handler = proc_dointvec_minmax, - .extra1 = &zero, - .extra2 = &one, + .extra1 = SYSCTL_ZERO, + .extra2 = SYSCTL_ONE, }, { } }; diff --git a/arch/arm64/kernel/time.c b/arch/arm64/kernel/time.c index 73f06d4b3aae..eebbc8d7123e 100644 --- a/arch/arm64/kernel/time.c +++ b/arch/arm64/kernel/time.c @@ -23,7 +23,7 @@ #include <linux/irq.h> #include <linux/delay.h> #include <linux/clocksource.h> -#include <linux/clk-provider.h> +#include <linux/of_clk.h> #include <linux/acpi.h> #include <clocksource/arm_arch_timer.h> diff --git a/arch/s390/boot/uv.c b/arch/s390/boot/uv.c index ed007f4a6444..3f501159ee9f 100644 --- a/arch/s390/boot/uv.c +++ b/arch/s390/boot/uv.c @@ -15,7 +15,8 @@ void uv_query_info(void) if (!test_facility(158)) return; - if (uv_call(0, (uint64_t)&uvcb)) + /* rc==0x100 means that there is additional data we do not process */ + if (uv_call(0, (uint64_t)&uvcb) && uvcb.header.rc != 0x100) return; if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) && diff --git a/arch/s390/include/asm/timex.h b/arch/s390/include/asm/timex.h index 670f14a228e5..6bf3a45ccfec 100644 --- a/arch/s390/include/asm/timex.h +++ b/arch/s390/include/asm/timex.h @@ -155,7 +155,7 @@ static inline void get_tod_clock_ext(char *clk) static inline unsigned long long get_tod_clock(void) { - unsigned char clk[STORE_CLOCK_EXT_SIZE]; + char clk[STORE_CLOCK_EXT_SIZE]; get_tod_clock_ext(clk); return *((unsigned long long *)&clk[1]); diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c index 1f22b6bbda68..39eb276d0277 100644 --- a/arch/x86/events/amd/core.c +++ b/arch/x86/events/amd/core.c @@ -250,6 +250,7 @@ static const u64 amd_f17h_perfmon_event_map[PERF_COUNT_HW_MAX] = [PERF_COUNT_HW_CPU_CYCLES] = 0x0076, [PERF_COUNT_HW_INSTRUCTIONS] = 0x00c0, [PERF_COUNT_HW_CACHE_REFERENCES] = 0xff60, + [PERF_COUNT_HW_CACHE_MISSES] = 0x0964, [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x00c2, [PERF_COUNT_HW_BRANCH_MISSES] = 0x00c3, [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = 0x0287, diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c index 3be51aa06e67..dff6623804c2 100644 --- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -4765,6 +4765,7 @@ __init int intel_pmu_init(void) break; case INTEL_FAM6_ATOM_TREMONT_D: + case INTEL_FAM6_ATOM_TREMONT: x86_pmu.late_ack = true; memcpy(hw_cache_event_ids, glp_hw_cache_event_ids, sizeof(hw_cache_event_ids)); diff --git a/arch/x86/events/intel/cstate.c b/arch/x86/events/intel/cstate.c index e1daf4151e11..4814c964692c 100644 --- a/arch/x86/events/intel/cstate.c +++ b/arch/x86/events/intel/cstate.c @@ -40,17 +40,18 @@ * Model specific counters: * MSR_CORE_C1_RES: CORE C1 Residency Counter * perf code: 0x00 - * Available model: SLM,AMT,GLM,CNL + * Available model: SLM,AMT,GLM,CNL,TNT * Scope: Core (each processor core has a MSR) * MSR_CORE_C3_RESIDENCY: CORE C3 Residency Counter * perf code: 0x01 * Available model: NHM,WSM,SNB,IVB,HSW,BDW,SKL,GLM, - * CNL,KBL,CML + * CNL,KBL,CML,TNT * Scope: Core * MSR_CORE_C6_RESIDENCY: CORE C6 Residency Counter * perf code: 0x02 * Available model: SLM,AMT,NHM,WSM,SNB,IVB,HSW,BDW, - * SKL,KNL,GLM,CNL,KBL,CML,ICL,TGL + * SKL,KNL,GLM,CNL,KBL,CML,ICL,TGL, + * TNT * Scope: Core * MSR_CORE_C7_RESIDENCY: CORE C7 Residency Counter * perf code: 0x03 @@ -60,17 +61,18 @@ * MSR_PKG_C2_RESIDENCY: Package C2 Residency Counter. * perf code: 0x00 * Available model: SNB,IVB,HSW,BDW,SKL,KNL,GLM,CNL, - * KBL,CML,ICL,TGL + * KBL,CML,ICL,TGL,TNT * Scope: Package (physical package) * MSR_PKG_C3_RESIDENCY: Package C3 Residency Counter. * perf code: 0x01 * Available model: NHM,WSM,SNB,IVB,HSW,BDW,SKL,KNL, - * GLM,CNL,KBL,CML,ICL,TGL + * GLM,CNL,KBL,CML,ICL,TGL,TNT * Scope: Package (physical package) * MSR_PKG_C6_RESIDENCY: Package C6 Residency Counter. * perf code: 0x02 - * Available model: SLM,AMT,NHM,WSM,SNB,IVB,HSW,BDW - * SKL,KNL,GLM,CNL,KBL,CML,ICL,TGL + * Available model: SLM,AMT,NHM,WSM,SNB,IVB,HSW,BDW, + * SKL,KNL,GLM,CNL,KBL,CML,ICL,TGL, + * TNT * Scope: Package (physical package) * MSR_PKG_C7_RESIDENCY: Package C7 Residency Counter. * perf code: 0x03 @@ -87,7 +89,8 @@ * Scope: Package (physical package) * MSR_PKG_C10_RESIDENCY: Package C10 Residency Counter. * perf code: 0x06 - * Available model: HSW ULT,KBL,GLM,CNL,CML,ICL,TGL + * Available model: HSW ULT,KBL,GLM,CNL,CML,ICL,TGL, + * TNT * Scope: Package (physical package) * */ @@ -640,8 +643,9 @@ static const struct x86_cpu_id intel_cstates_match[] __initconst = { X86_CSTATES_MODEL(INTEL_FAM6_ATOM_GOLDMONT, glm_cstates), X86_CSTATES_MODEL(INTEL_FAM6_ATOM_GOLDMONT_D, glm_cstates), - X86_CSTATES_MODEL(INTEL_FAM6_ATOM_GOLDMONT_PLUS, glm_cstates), + X86_CSTATES_MODEL(INTEL_FAM6_ATOM_TREMONT_D, glm_cstates), + X86_CSTATES_MODEL(INTEL_FAM6_ATOM_TREMONT, glm_cstates), X86_CSTATES_MODEL(INTEL_FAM6_ICELAKE_L, icl_cstates), X86_CSTATES_MODEL(INTEL_FAM6_ICELAKE, icl_cstates), diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c index 4b94ae4ae369..dc43cc124e09 100644 --- a/arch/x86/events/intel/ds.c +++ b/arch/x86/events/intel/ds.c @@ -1714,6 +1714,8 @@ intel_pmu_save_and_restart_reload(struct perf_event *event, int count) old = ((s64)(prev_raw_count << shift) >> shift); local64_add(new - old + count * period, &event->count); + local64_set(&hwc->period_left, -new); + perf_event_update_userpage(event); return 0; diff --git a/arch/x86/events/msr.c b/arch/x86/events/msr.c index 6f86650b3f77..a949f6f55991 100644 --- a/arch/x86/events/msr.c +++ b/arch/x86/events/msr.c @@ -75,8 +75,9 @@ static bool test_intel(int idx, void *data) case INTEL_FAM6_ATOM_GOLDMONT: case INTEL_FAM6_ATOM_GOLDMONT_D: - case INTEL_FAM6_ATOM_GOLDMONT_PLUS: + case INTEL_FAM6_ATOM_TREMONT_D: + case INTEL_FAM6_ATOM_TREMONT: case INTEL_FAM6_XEON_PHI_KNL: case INTEL_FAM6_XEON_PHI_KNM: diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 4dffbc10d3f8..40a0c0fd95ca 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -781,9 +781,19 @@ struct kvm_vcpu_arch { u64 msr_kvm_poll_control; /* - * Indicate whether the access faults on its page table in guest - * which is set when fix page fault and used to detect unhandeable - * instruction. + * Indicates the guest is trying to write a gfn that contains one or + * more of the PTEs used to translate the write itself, i.e. the access + * is changing its own translation in the guest page tables. KVM exits + * to userspace if emulation of the faulting instruction fails and this + * flag is set, as KVM cannot make forward progress. + * + * If emulation fails for a write to guest page tables, KVM unprotects + * (zaps) the shadow page for the target gfn and resumes the guest to + * retry the non-emulatable instruction (on hardware). Unprotecting the + * gfn doesn't allow forward progress for a self-changing access because + * doing so also zaps the translation for the gfn, i.e. retrying the + * instruction will hit a !PRESENT fault, which results in a new shadow + * page and sends KVM back to square one. */ bool write_fault_to_shadow_pgtable; diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index eafc631d305c..afcd30d44cbb 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -1080,9 +1080,6 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, result = 1; /* assumes that there are only KVM_APIC_INIT/SIPI */ apic->pending_events = (1UL << KVM_APIC_INIT); - /* make sure pending_events is visible before sending - * the request */ - smp_wmb(); kvm_make_request(KVM_REQ_EVENT, vcpu); kvm_vcpu_kick(vcpu); } diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h index d55674f44a18..a647601c9e1c 100644 --- a/arch/x86/kvm/mmu.h +++ b/arch/x86/kvm/mmu.h @@ -102,6 +102,19 @@ static inline void kvm_mmu_load_cr3(struct kvm_vcpu *vcpu) kvm_get_active_pcid(vcpu)); } +int kvm_tdp_page_fault(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code, + bool prefault); + +static inline int kvm_mmu_do_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, + u32 err, bool prefault) +{ +#ifdef CONFIG_RETPOLINE + if (likely(vcpu->arch.mmu->page_fault == kvm_tdp_page_fault)) + return kvm_tdp_page_fault(vcpu, cr2_or_gpa, err, prefault); +#endif + return vcpu->arch.mmu->page_fault(vcpu, cr2_or_gpa, err, prefault); +} + /* * Currently, we have two sorts of write-protection, a) the first one * write-protects guest page to sync the guest modification, b) another one is diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 7011a4e54866..87e9ba27ada1 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -4219,8 +4219,8 @@ int kvm_handle_page_fault(struct kvm_vcpu *vcpu, u64 error_code, } EXPORT_SYMBOL_GPL(kvm_handle_page_fault); -static int tdp_page_fault(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code, - bool prefault) +int kvm_tdp_page_fault(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code, + bool prefault) { int max_level; @@ -4925,7 +4925,7 @@ static void init_kvm_tdp_mmu(struct kvm_vcpu *vcpu) return; context->mmu_role.as_u64 = new_role.as_u64; - context->page_fault = tdp_page_fault; + context->page_fault = kvm_tdp_page_fault; context->sync_page = nonpaging_sync_page; context->invlpg = nonpaging_invlpg; context->update_pte = nonpaging_update_pte; @@ -5436,9 +5436,8 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 error_code, } if (r == RET_PF_INVALID) { - r = vcpu->arch.mmu->page_fault(vcpu, cr2_or_gpa, - lower_32_bits(error_code), - false); + r = kvm_mmu_do_page_fault(vcpu, cr2_or_gpa, + lower_32_bits(error_code), false); WARN_ON(r == RET_PF_INVALID); } diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h index 4e1ef0473663..e4c8a4cbf407 100644 --- a/arch/x86/kvm/mmu/paging_tmpl.h +++ b/arch/x86/kvm/mmu/paging_tmpl.h @@ -33,7 +33,7 @@ #define PT_GUEST_ACCESSED_SHIFT PT_ACCESSED_SHIFT #define PT_HAVE_ACCESSED_DIRTY(mmu) true #ifdef CONFIG_X86_64 - #define PT_MAX_FULL_LEVELS 4 + #define PT_MAX_FULL_LEVELS PT64_ROOT_MAX_LEVEL #define CMPXCHG cmpxchg #else #define CMPXCHG cmpxchg64 diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index a3e32d61d60c..bef0ba35f121 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -2175,7 +2175,6 @@ static void svm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) u32 dummy; u32 eax = 1; - vcpu->arch.microcode_version = 0x01000065; svm->spec_ctrl = 0; svm->virt_spec_ctrl = 0; @@ -2266,6 +2265,7 @@ static int svm_create_vcpu(struct kvm_vcpu *vcpu) init_vmcb(svm); svm_init_osvw(vcpu); + vcpu->arch.microcode_version = 0x01000065; return 0; diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 657c2eda357c..3589cd3c0fcc 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -544,7 +544,8 @@ static void nested_vmx_disable_intercept_for_msr(unsigned long *msr_bitmap_l1, } } -static inline void enable_x2apic_msr_intercepts(unsigned long *msr_bitmap) { +static inline void enable_x2apic_msr_intercepts(unsigned long *msr_bitmap) +{ int msr; for (msr = 0x800; msr <= 0x8ff; msr += BITS_PER_LONG) { @@ -1981,7 +1982,7 @@ static int nested_vmx_handle_enlightened_vmptrld(struct kvm_vcpu *vcpu, } /* - * Clean fields data can't de used on VMLAUNCH and when we switch + * Clean fields data can't be used on VMLAUNCH and when we switch * between different L2 guests as KVM keeps a single VMCS12 per L1. */ if (from_launch || evmcs_gpa_changed) @@ -3575,6 +3576,33 @@ static void nested_vmx_inject_exception_vmexit(struct kvm_vcpu *vcpu, nested_vmx_vmexit(vcpu, EXIT_REASON_EXCEPTION_NMI, intr_info, exit_qual); } +/* + * Returns true if a debug trap is pending delivery. + * + * In KVM, debug traps bear an exception payload. As such, the class of a #DB + * exception may be inferred from the presence of an exception payload. + */ +static inline bool vmx_pending_dbg_trap(struct kvm_vcpu *vcpu) +{ + return vcpu->arch.exception.pending && + vcpu->arch.exception.nr == DB_VECTOR && + vcpu->arch.exception.payload; +} + +/* + * Certain VM-exits set the 'pending debug exceptions' field to indicate a + * recognized #DB (data or single-step) that has yet to be delivered. Since KVM + * represents these debug traps with a payload that is said to be compatible + * with the 'pending debug exceptions' field, write the payload to the VMCS + * field if a VM-exit is delivered before the debug trap. + */ +static void nested_vmx_update_pending_dbg(struct kvm_vcpu *vcpu) +{ + if (vmx_pending_dbg_trap(vcpu)) + vmcs_writel(GUEST_PENDING_DBG_EXCEPTIONS, + vcpu->arch.exception.payload); +} + static int vmx_check_nested_events(struct kvm_vcpu *vcpu, bool external_intr) { struct vcpu_vmx *vmx = to_vmx(vcpu); @@ -3587,6 +3615,7 @@ static int vmx_check_nested_events(struct kvm_vcpu *vcpu, bool external_intr) test_bit(KVM_APIC_INIT, &apic->pending_events)) { if (block_nested_events) return -EBUSY; + nested_vmx_update_pending_dbg(vcpu); clear_bit(KVM_APIC_INIT, &apic->pending_events); nested_vmx_vmexit(vcpu, EXIT_REASON_INIT_SIGNAL, 0, 0); return 0; diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 9a6664886f2e..3be25ecae145 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -2947,6 +2947,9 @@ void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) static int get_ept_level(struct kvm_vcpu *vcpu) { + /* Nested EPT currently only supports 4-level walks. */ + if (is_guest_mode(vcpu) && nested_cpu_has_ept(get_vmcs12(vcpu))) + return 4; if (cpu_has_vmx_ept_5levels() && (cpuid_maxphyaddr(vcpu) > 48)) return 5; return 4; @@ -4238,7 +4241,6 @@ static void vmx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) vmx->msr_ia32_umwait_control = 0; - vcpu->arch.microcode_version = 0x100000000ULL; vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val(); vmx->hv_deadline_tsc = -1; kvm_set_cr8(vcpu, 0); @@ -6763,6 +6765,7 @@ static int vmx_create_vcpu(struct kvm_vcpu *vcpu) vmx->nested.posted_intr_nv = -1; vmx->nested.current_vmptr = -1ull; + vcpu->arch.microcode_version = 0x100000000ULL; vmx->msr_ia32_feature_control_valid_bits = FEAT_CTL_LOCKED; /* diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index fbabb2f06273..fb5d64ebc35d 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -438,6 +438,14 @@ void kvm_deliver_exception_payload(struct kvm_vcpu *vcpu) * for #DB exceptions under VMX. */ vcpu->arch.dr6 ^= payload & DR6_RTM; + + /* + * The #DB payload is defined as compatible with the 'pending + * debug exceptions' field under VMX, not DR6. While bit 12 is + * defined in the 'pending debug exceptions' field (enabled + * breakpoint), it is reserved and must be zero in DR6. + */ + vcpu->arch.dr6 &= ~BIT(12); break; case PF_VECTOR: vcpu->arch.cr2 = payload; @@ -490,19 +498,7 @@ static void kvm_multiple_exception(struct kvm_vcpu *vcpu, vcpu->arch.exception.error_code = error_code; vcpu->arch.exception.has_payload = has_payload; vcpu->arch.exception.payload = payload; - /* - * In guest mode, payload delivery should be deferred, - * so that the L1 hypervisor can intercept #PF before - * CR2 is modified (or intercept #DB before DR6 is - * modified under nVMX). However, for ABI - * compatibility with KVM_GET_VCPU_EVENTS and - * KVM_SET_VCPU_EVENTS, we can't delay payload - * delivery unless userspace has enabled this - * functionality via the per-VM capability, - * KVM_CAP_EXCEPTION_PAYLOAD. - */ - if (!vcpu->kvm->arch.exception_payload_enabled || - !is_guest_mode(vcpu)) + if (!is_guest_mode(vcpu)) kvm_deliver_exception_payload(vcpu); return; } @@ -2448,7 +2444,7 @@ static int kvm_guest_time_update(struct kvm_vcpu *v) vcpu->hv_clock.tsc_timestamp = tsc_timestamp; vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset; vcpu->last_guest_tsc = tsc_timestamp; - WARN_ON(vcpu->hv_clock.system_time < 0); + WARN_ON((s64)vcpu->hv_clock.system_time < 0); /* If the host uses TSC clocksource, then it is stable */ pvclock_flags = 0; @@ -3796,6 +3792,21 @@ static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu, process_nmi(vcpu); /* + * In guest mode, payload delivery should be deferred, + * so that the L1 hypervisor can intercept #PF before + * CR2 is modified (or intercept #DB before DR6 is + * modified under nVMX). Unless the per-VM capability, + * KVM_CAP_EXCEPTION_PAYLOAD, is set, we may not defer the delivery of + * an exception payload and handle after a KVM_GET_VCPU_EVENTS. Since we + * opportunistically defer the exception payload, deliver it if the + * capability hasn't been requested before processing a + * KVM_GET_VCPU_EVENTS. + */ + if (!vcpu->kvm->arch.exception_payload_enabled && + vcpu->arch.exception.pending && vcpu->arch.exception.has_payload) + kvm_deliver_exception_payload(vcpu); + + /* * The API doesn't provide the instruction length for software * exceptions, so don't report them. As long as the guest RIP * isn't advanced, we should expect to encounter the exception @@ -8942,7 +8953,6 @@ int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index, kvm_rip_write(vcpu, ctxt->eip); kvm_set_rflags(vcpu, ctxt->eflags); - kvm_make_request(KVM_REQ_EVENT, vcpu); return 1; } EXPORT_SYMBOL_GPL(kvm_task_switch); @@ -10182,7 +10192,7 @@ void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) work->arch.cr3 != vcpu->arch.mmu->get_cr3(vcpu)) return; - vcpu->arch.mmu->page_fault(vcpu, work->cr2_or_gpa, 0, true); + kvm_mmu_do_page_fault(vcpu, work->cr2_or_gpa, 0, true); } static inline u32 kvm_async_pf_hash_fn(gfn_t gfn) diff --git a/crypto/Kconfig b/crypto/Kconfig index cdb51d4272d0..c24a47406f8f 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -136,8 +136,6 @@ config CRYPTO_USER Userspace configuration for cryptographic instantiations such as cbc(aes). -if CRYPTO_MANAGER2 - config CRYPTO_MANAGER_DISABLE_TESTS bool "Disable run-time self tests" default y @@ -155,8 +153,6 @@ config CRYPTO_MANAGER_EXTRA_TESTS This is intended for developer use only, as these tests take much longer to run than the normal self tests. -endif # if CRYPTO_MANAGER2 - config CRYPTO_GF128MUL tristate diff --git a/crypto/testmgr.c b/crypto/testmgr.c index 88f33c0efb23..ccb3d60729fc 100644 --- a/crypto/testmgr.c +++ b/crypto/testmgr.c @@ -4436,6 +4436,15 @@ static const struct alg_test_desc alg_test_descs[] = { .cipher = __VECS(tf_cbc_tv_template) }, }, { +#if IS_ENABLED(CONFIG_CRYPTO_PAES_S390) + .alg = "cbc-paes-s390", + .fips_allowed = 1, + .test = alg_test_skcipher, + .suite = { + .cipher = __VECS(aes_cbc_tv_template) + } + }, { +#endif .alg = "cbcmac(aes)", .fips_allowed = 1, .test = alg_test_hash, @@ -4587,6 +4596,15 @@ static const struct alg_test_desc alg_test_descs[] = { .cipher = __VECS(tf_ctr_tv_template) } }, { +#if IS_ENABLED(CONFIG_CRYPTO_PAES_S390) + .alg = "ctr-paes-s390", + .fips_allowed = 1, + .test = alg_test_skcipher, + .suite = { + .cipher = __VECS(aes_ctr_tv_template) + } + }, { +#endif .alg = "cts(cbc(aes))", .test = alg_test_skcipher, .fips_allowed = 1, @@ -4879,6 +4897,15 @@ static const struct alg_test_desc alg_test_descs[] = { .cipher = __VECS(xtea_tv_template) } }, { +#if IS_ENABLED(CONFIG_CRYPTO_PAES_S390) + .alg = "ecb-paes-s390", + .fips_allowed = 1, + .test = alg_test_skcipher, + .suite = { + .cipher = __VECS(aes_tv_template) + } + }, { +#endif .alg = "ecdh", .test = alg_test_kpp, .fips_allowed = 1, @@ -5465,6 +5492,15 @@ static const struct alg_test_desc alg_test_descs[] = { .cipher = __VECS(tf_xts_tv_template) } }, { +#if IS_ENABLED(CONFIG_CRYPTO_PAES_S390) + .alg = "xts-paes-s390", + .fips_allowed = 1, + .test = alg_test_skcipher, + .suite = { + .cipher = __VECS(aes_xts_tv_template) + } + }, { +#endif .alg = "xts4096(paes)", .test = alg_test_null, .fips_allowed = 1, diff --git a/drivers/acpi/acpica/achware.h b/drivers/acpi/acpica/achware.h index 67f282e9e0af..6ad0517553d5 100644 --- a/drivers/acpi/acpica/achware.h +++ b/drivers/acpi/acpica/achware.h @@ -101,6 +101,8 @@ acpi_status acpi_hw_enable_all_runtime_gpes(void); acpi_status acpi_hw_enable_all_wakeup_gpes(void); +u8 acpi_hw_check_all_gpes(void); + acpi_status acpi_hw_enable_runtime_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, struct acpi_gpe_block_info *gpe_block, diff --git a/drivers/acpi/acpica/evxfgpe.c b/drivers/acpi/acpica/evxfgpe.c index 2c39ff2a7406..f2de66bfd8a7 100644 --- a/drivers/acpi/acpica/evxfgpe.c +++ b/drivers/acpi/acpica/evxfgpe.c @@ -795,6 +795,38 @@ acpi_status acpi_enable_all_wakeup_gpes(void) ACPI_EXPORT_SYMBOL(acpi_enable_all_wakeup_gpes) +/****************************************************************************** + * + * FUNCTION: acpi_any_gpe_status_set + * + * PARAMETERS: None + * + * RETURN: Whether or not the status bit is set for any GPE + * + * DESCRIPTION: Check the status bits of all enabled GPEs and return TRUE if any + * of them is set or FALSE otherwise. + * + ******************************************************************************/ +u32 acpi_any_gpe_status_set(void) +{ + acpi_status status; + u8 ret; + + ACPI_FUNCTION_TRACE(acpi_any_gpe_status_set); + + status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); + if (ACPI_FAILURE(status)) { + return (FALSE); + } + + ret = acpi_hw_check_all_gpes(); + (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); + + return (ret); +} + +ACPI_EXPORT_SYMBOL(acpi_any_gpe_status_set) + /******************************************************************************* * * FUNCTION: acpi_install_gpe_block diff --git a/drivers/acpi/acpica/hwgpe.c b/drivers/acpi/acpica/hwgpe.c index 1b4252bdcd0b..f4c285c2f595 100644 --- a/drivers/acpi/acpica/hwgpe.c +++ b/drivers/acpi/acpica/hwgpe.c @@ -446,6 +446,53 @@ acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, /****************************************************************************** * + * FUNCTION: acpi_hw_get_gpe_block_status + * + * PARAMETERS: gpe_xrupt_info - GPE Interrupt info + * gpe_block - Gpe Block info + * + * RETURN: Success + * + * DESCRIPTION: Produce a combined GPE status bits mask for the given block. + * + ******************************************************************************/ + +static acpi_status +acpi_hw_get_gpe_block_status(struct acpi_gpe_xrupt_info *gpe_xrupt_info, + struct acpi_gpe_block_info *gpe_block, + void *ret_ptr) +{ + struct acpi_gpe_register_info *gpe_register_info; + u64 in_enable, in_status; + acpi_status status; + u8 *ret = ret_ptr; + u32 i; + + /* Examine each GPE Register within the block */ + + for (i = 0; i < gpe_block->register_count; i++) { + gpe_register_info = &gpe_block->register_info[i]; + + status = acpi_hw_read(&in_enable, + &gpe_register_info->enable_address); + if (ACPI_FAILURE(status)) { + continue; + } + + status = acpi_hw_read(&in_status, + &gpe_register_info->status_address); + if (ACPI_FAILURE(status)) { + continue; + } + + *ret |= in_enable & in_status; + } + + return (AE_OK); +} + +/****************************************************************************** + * * FUNCTION: acpi_hw_disable_all_gpes * * PARAMETERS: None @@ -510,4 +557,28 @@ acpi_status acpi_hw_enable_all_wakeup_gpes(void) return_ACPI_STATUS(status); } +/****************************************************************************** + * + * FUNCTION: acpi_hw_check_all_gpes + * + * PARAMETERS: None + * + * RETURN: Combined status of all GPEs + * + * DESCRIPTION: Check all enabled GPEs in all GPE blocks and return TRUE if the + * status bit is set for at least one of them of FALSE otherwise. + * + ******************************************************************************/ + +u8 acpi_hw_check_all_gpes(void) +{ + u8 ret = 0; + + ACPI_FUNCTION_TRACE(acpi_hw_check_all_gpes); + + (void)acpi_ev_walk_gpe_list(acpi_hw_get_gpe_block_status, &ret); + + return (ret != 0); +} + #endif /* !ACPI_REDUCED_HARDWARE */ diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 08bc9751fe66..d1f1cf5d4bf0 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -179,6 +179,7 @@ EXPORT_SYMBOL(first_ec); static struct acpi_ec *boot_ec; static bool boot_ec_is_ecdt = false; +static struct workqueue_struct *ec_wq; static struct workqueue_struct *ec_query_wq; static int EC_FLAGS_QUERY_HANDSHAKE; /* Needs QR_EC issued when SCI_EVT set */ @@ -469,7 +470,7 @@ static void acpi_ec_submit_query(struct acpi_ec *ec) ec_dbg_evt("Command(%s) submitted/blocked", acpi_ec_cmd_string(ACPI_EC_COMMAND_QUERY)); ec->nr_pending_queries++; - schedule_work(&ec->work); + queue_work(ec_wq, &ec->work); } } @@ -535,7 +536,7 @@ static void acpi_ec_enable_event(struct acpi_ec *ec) #ifdef CONFIG_PM_SLEEP static void __acpi_ec_flush_work(void) { - flush_scheduled_work(); /* flush ec->work */ + drain_workqueue(ec_wq); /* flush ec->work */ flush_workqueue(ec_query_wq); /* flush queries */ } @@ -556,8 +557,8 @@ static void acpi_ec_disable_event(struct acpi_ec *ec) void acpi_ec_flush_work(void) { - /* Without ec_query_wq there is nothing to flush. */ - if (!ec_query_wq) + /* Without ec_wq there is nothing to flush. */ + if (!ec_wq) return; __acpi_ec_flush_work(); @@ -2107,25 +2108,33 @@ static struct acpi_driver acpi_ec_driver = { .drv.pm = &acpi_ec_pm, }; -static inline int acpi_ec_query_init(void) +static void acpi_ec_destroy_workqueues(void) { - if (!ec_query_wq) { - ec_query_wq = alloc_workqueue("kec_query", 0, - ec_max_queries); - if (!ec_query_wq) - return -ENODEV; + if (ec_wq) { + destroy_workqueue(ec_wq); + ec_wq = NULL; } - return 0; -} - -static inline void acpi_ec_query_exit(void) -{ if (ec_query_wq) { destroy_workqueue(ec_query_wq); ec_query_wq = NULL; } } +static int acpi_ec_init_workqueues(void) +{ + if (!ec_wq) + ec_wq = alloc_ordered_workqueue("kec", 0); + + if (!ec_query_wq) + ec_query_wq = alloc_workqueue("kec_query", 0, ec_max_queries); + + if (!ec_wq || !ec_query_wq) { + acpi_ec_destroy_workqueues(); + return -ENODEV; + } + return 0; +} + static const struct dmi_system_id acpi_ec_no_wakeup[] = { { .ident = "Thinkpad X1 Carbon 6th", @@ -2156,8 +2165,7 @@ int __init acpi_ec_init(void) int result; int ecdt_fail, dsdt_fail; - /* register workqueue for _Qxx evaluations */ - result = acpi_ec_query_init(); + result = acpi_ec_init_workqueues(); if (result) return result; @@ -2188,6 +2196,6 @@ static void __exit acpi_ec_exit(void) { acpi_bus_unregister_driver(&acpi_ec_driver); - acpi_ec_query_exit(); + acpi_ec_destroy_workqueues(); } #endif /* 0 */ diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 439880629839..152f7fc0b200 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -990,21 +990,34 @@ static void acpi_s2idle_sync(void) acpi_os_wait_events_complete(); /* synchronize Notify handling */ } -static void acpi_s2idle_wake(void) +static bool acpi_s2idle_wake(void) { - /* - * If IRQD_WAKEUP_ARMED is set for the SCI at this point, the SCI has - * not triggered while suspended, so bail out. - */ - if (!acpi_sci_irq_valid() || - irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq))) - return; + if (!acpi_sci_irq_valid()) + return pm_wakeup_pending(); + + while (pm_wakeup_pending()) { + /* + * If IRQD_WAKEUP_ARMED is set for the SCI at this point, the + * SCI has not triggered while suspended, so bail out (the + * wakeup is pending anyway and the SCI is not the source of + * it). + */ + if (irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq))) + return true; + + /* + * If there are no EC events to process and at least one of the + * other enabled GPEs is active, the wakeup is regarded as a + * genuine one. + * + * Note that the checks below must be carried out in this order + * to avoid returning prematurely due to a change of the EC GPE + * status bit from unset to set between the checks with the + * status bits of all the other GPEs unset. + */ + if (acpi_any_gpe_status_set() && !acpi_ec_dispatch_gpe()) + return true; - /* - * If there are EC events to process, the wakeup may be a spurious one - * coming from the EC. - */ - if (acpi_ec_dispatch_gpe()) { /* * Cancel the wakeup and process all pending events in case * there are any wakeup ones in there. @@ -1017,8 +1030,19 @@ static void acpi_s2idle_wake(void) acpi_s2idle_sync(); + /* + * The SCI is in the "suspended" state now and it cannot produce + * new wakeup events till the rearming below, so if any of them + * are pending here, they must be resulting from the processing + * of EC events above or coming from somewhere else. + */ + if (pm_wakeup_pending()) + return true; + rearm_wake_irq(acpi_sci_irq); } + + return false; } static void acpi_s2idle_restore_early(void) diff --git a/drivers/char/ipmi/ipmb_dev_int.c b/drivers/char/ipmi/ipmb_dev_int.c index 1ff4fb1def7c..382b28f1cf2f 100644 --- a/drivers/char/ipmi/ipmb_dev_int.c +++ b/drivers/char/ipmi/ipmb_dev_int.c @@ -19,7 +19,7 @@ #include <linux/spinlock.h> #include <linux/wait.h> -#define MAX_MSG_LEN 128 +#define MAX_MSG_LEN 240 #define IPMB_REQUEST_LEN_MIN 7 #define NETFN_RSP_BIT_MASK 0x4 #define REQUEST_QUEUE_MAX_LEN 256 @@ -63,6 +63,7 @@ struct ipmb_dev { spinlock_t lock; wait_queue_head_t wait_queue; struct mutex file_mutex; + bool is_i2c_protocol; }; static inline struct ipmb_dev *to_ipmb_dev(struct file *file) @@ -112,6 +113,25 @@ static ssize_t ipmb_read(struct file *file, char __user *buf, size_t count, return ret < 0 ? ret : count; } +static int ipmb_i2c_write(struct i2c_client *client, u8 *msg, u8 addr) +{ + struct i2c_msg i2c_msg; + + /* + * subtract 1 byte (rq_sa) from the length of the msg passed to + * raw i2c_transfer + */ + i2c_msg.len = msg[IPMB_MSG_LEN_IDX] - 1; + + /* Assign message to buffer except first 2 bytes (length and address) */ + i2c_msg.buf = msg + 2; + + i2c_msg.addr = addr; + i2c_msg.flags = client->flags & I2C_CLIENT_PEC; + + return i2c_transfer(client->adapter, &i2c_msg, 1); +} + static ssize_t ipmb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { @@ -133,6 +153,12 @@ static ssize_t ipmb_write(struct file *file, const char __user *buf, rq_sa = GET_7BIT_ADDR(msg[RQ_SA_8BIT_IDX]); netf_rq_lun = msg[NETFN_LUN_IDX]; + /* Check i2c block transfer vs smbus */ + if (ipmb_dev->is_i2c_protocol) { + ret = ipmb_i2c_write(ipmb_dev->client, msg, rq_sa); + return (ret == 1) ? count : ret; + } + /* * subtract rq_sa and netf_rq_lun from the length of the msg passed to * i2c_smbus_xfer @@ -253,7 +279,7 @@ static int ipmb_slave_cb(struct i2c_client *client, break; case I2C_SLAVE_WRITE_RECEIVED: - if (ipmb_dev->msg_idx >= sizeof(struct ipmb_msg)) + if (ipmb_dev->msg_idx >= sizeof(struct ipmb_msg) - 1) break; buf[++ipmb_dev->msg_idx] = *val; @@ -302,6 +328,9 @@ static int ipmb_probe(struct i2c_client *client, if (ret) return ret; + ipmb_dev->is_i2c_protocol + = device_property_read_bool(&client->dev, "i2c-protocol"); + ipmb_dev->client = client; i2c_set_clientdata(client, ipmb_dev); ret = i2c_slave_register(client, ipmb_slave_cb); diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c index 22c6a2e61236..8ac390c2b514 100644 --- a/drivers/char/ipmi/ipmi_ssif.c +++ b/drivers/char/ipmi/ipmi_ssif.c @@ -775,10 +775,14 @@ static void msg_done_handler(struct ssif_info *ssif_info, int result, flags = ipmi_ssif_lock_cond(ssif_info, &oflags); msg = ssif_info->curr_msg; if (msg) { + if (data) { + if (len > IPMI_MAX_MSG_LENGTH) + len = IPMI_MAX_MSG_LENGTH; + memcpy(msg->rsp, data, len); + } else { + len = 0; + } msg->rsp_size = len; - if (msg->rsp_size > IPMI_MAX_MSG_LENGTH) - msg->rsp_size = IPMI_MAX_MSG_LENGTH; - memcpy(msg->rsp, data, msg->rsp_size); ssif_info->curr_msg = NULL; } diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 4adac3a8c265..cbe6c94bf158 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -105,6 +105,8 @@ bool have_governor_per_policy(void) } EXPORT_SYMBOL_GPL(have_governor_per_policy); +static struct kobject *cpufreq_global_kobject; + struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy) { if (have_governor_per_policy()) @@ -2745,9 +2747,6 @@ int cpufreq_unregister_driver(struct cpufreq_driver *driver) } EXPORT_SYMBOL_GPL(cpufreq_unregister_driver); -struct kobject *cpufreq_global_kobject; -EXPORT_SYMBOL(cpufreq_global_kobject); - static int __init cpufreq_core_init(void) { if (cpufreq_disabled()) diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 26a654dbc69a..0aa4b6bc5101 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -61,7 +61,7 @@ struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev) { if (!blk_queue_dax(bdev->bd_queue)) return NULL; - return fs_dax_get_by_host(bdev->bd_disk->disk_name); + return dax_get_by_host(bdev->bd_disk->disk_name); } EXPORT_SYMBOL_GPL(fs_dax_get_by_bdev); #endif diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c index 7243b88f81d8..69e0d90460e6 100644 --- a/drivers/edac/edac_mc.c +++ b/drivers/edac/edac_mc.c @@ -505,16 +505,10 @@ void edac_mc_free(struct mem_ctl_info *mci) { edac_dbg(1, "\n"); - /* If we're not yet registered with sysfs free only what was allocated - * in edac_mc_alloc(). - */ - if (!device_is_registered(&mci->dev)) { - _edac_mc_free(mci); - return; - } + if (device_is_registered(&mci->dev)) + edac_unregister_sysfs(mci); - /* the mci instance is freed here, when the sysfs object is dropped */ - edac_unregister_sysfs(mci); + _edac_mc_free(mci); } EXPORT_SYMBOL_GPL(edac_mc_free); diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c index 0367554e7437..c70ec0a306d8 100644 --- a/drivers/edac/edac_mc_sysfs.c +++ b/drivers/edac/edac_mc_sysfs.c @@ -276,10 +276,7 @@ static const struct attribute_group *csrow_attr_groups[] = { static void csrow_attr_release(struct device *dev) { - struct csrow_info *csrow = container_of(dev, struct csrow_info, dev); - - edac_dbg(1, "device %s released\n", dev_name(dev)); - kfree(csrow); + /* release device with _edac_mc_free() */ } static const struct device_type csrow_attr_type = { @@ -447,8 +444,7 @@ error: csrow = mci->csrows[i]; if (!nr_pages_per_csrow(csrow)) continue; - - device_del(&mci->csrows[i]->dev); + device_unregister(&mci->csrows[i]->dev); } return err; @@ -608,10 +604,7 @@ static const struct attribute_group *dimm_attr_groups[] = { static void dimm_attr_release(struct device *dev) { - struct dimm_info *dimm = container_of(dev, struct dimm_info, dev); - - edac_dbg(1, "device %s released\n", dev_name(dev)); - kfree(dimm); + /* release device with _edac_mc_free() */ } static const struct device_type dimm_attr_type = { @@ -893,10 +886,7 @@ static const struct attribute_group *mci_attr_groups[] = { static void mci_attr_release(struct device *dev) { - struct mem_ctl_info *mci = container_of(dev, struct mem_ctl_info, dev); - - edac_dbg(1, "device %s released\n", dev_name(dev)); - kfree(mci); + /* release device with _edac_mc_free() */ } static const struct device_type mci_attr_type = { diff --git a/drivers/gpio/gpio-bd71828.c b/drivers/gpio/gpio-bd71828.c index 04aade9e0a4d..3dbbc638e9a9 100644 --- a/drivers/gpio/gpio-bd71828.c +++ b/drivers/gpio/gpio-bd71828.c @@ -10,16 +10,6 @@ #define GPIO_OUT_REG(off) (BD71828_REG_GPIO_CTRL1 + (off)) #define HALL_GPIO_OFFSET 3 -/* - * These defines can be removed when - * "gpio: Add definition for GPIO direction" - * (9208b1e77d6e8e9776f34f46ef4079ecac9c3c25 in GPIO tree) gets merged, - */ -#ifndef GPIO_LINE_DIRECTION_IN - #define GPIO_LINE_DIRECTION_IN 1 - #define GPIO_LINE_DIRECTION_OUT 0 -#endif - struct bd71828_gpio { struct rohm_regmap_dev chip; struct gpio_chip gpio; diff --git a/drivers/gpio/gpio-sifive.c b/drivers/gpio/gpio-sifive.c index 147a1bd04515..c54dd08f2cbf 100644 --- a/drivers/gpio/gpio-sifive.c +++ b/drivers/gpio/gpio-sifive.c @@ -35,7 +35,7 @@ struct sifive_gpio { void __iomem *base; struct gpio_chip gc; struct regmap *regs; - u32 irq_state; + unsigned long irq_state; unsigned int trigger[SIFIVE_GPIO_MAX]; unsigned int irq_parent[SIFIVE_GPIO_MAX]; }; @@ -94,7 +94,7 @@ static void sifive_gpio_irq_enable(struct irq_data *d) spin_unlock_irqrestore(&gc->bgpio_lock, flags); /* Enable interrupts */ - assign_bit(offset, (unsigned long *)&chip->irq_state, 1); + assign_bit(offset, &chip->irq_state, 1); sifive_gpio_set_ie(chip, offset); } @@ -104,7 +104,7 @@ static void sifive_gpio_irq_disable(struct irq_data *d) struct sifive_gpio *chip = gpiochip_get_data(gc); int offset = irqd_to_hwirq(d) % SIFIVE_GPIO_MAX; - assign_bit(offset, (unsigned long *)&chip->irq_state, 0); + assign_bit(offset, &chip->irq_state, 0); sifive_gpio_set_ie(chip, offset); irq_chip_disable_parent(d); } diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c index a9748b5198e6..67f9f82e0db0 100644 --- a/drivers/gpio/gpio-xilinx.c +++ b/drivers/gpio/gpio-xilinx.c @@ -147,9 +147,10 @@ static void xgpio_set_multiple(struct gpio_chip *gc, unsigned long *mask, for (i = 0; i < gc->ngpio; i++) { if (*mask == 0) break; + /* Once finished with an index write it out to the register */ if (index != xgpio_index(chip, i)) { xgpio_writereg(chip->regs + XGPIO_DATA_OFFSET + - xgpio_regoffset(chip, i), + index * XGPIO_CHANNEL_OFFSET, chip->gpio_state[index]); spin_unlock_irqrestore(&chip->gpio_lock[index], flags); index = xgpio_index(chip, i); @@ -165,7 +166,7 @@ static void xgpio_set_multiple(struct gpio_chip *gc, unsigned long *mask, } xgpio_writereg(chip->regs + XGPIO_DATA_OFFSET + - xgpio_regoffset(chip, i), chip->gpio_state[index]); + index * XGPIO_CHANNEL_OFFSET, chip->gpio_state[index]); spin_unlock_irqrestore(&chip->gpio_lock[index], flags); } diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 753283486037..4d0106ceeba7 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -3035,13 +3035,33 @@ EXPORT_SYMBOL_GPL(gpiochip_free_own_desc); * rely on gpio_request() having been called beforehand. */ -static int gpio_set_config(struct gpio_chip *gc, unsigned int offset, - enum pin_config_param mode) +static int gpio_do_set_config(struct gpio_chip *gc, unsigned int offset, + unsigned long config) { if (!gc->set_config) return -ENOTSUPP; - return gc->set_config(gc, offset, mode); + return gc->set_config(gc, offset, config); +} + +static int gpio_set_config(struct gpio_chip *gc, unsigned int offset, + enum pin_config_param mode) +{ + unsigned long config; + unsigned arg; + + switch (mode) { + case PIN_CONFIG_BIAS_PULL_DOWN: + case PIN_CONFIG_BIAS_PULL_UP: + arg = 1; + break; + + default: + arg = 0; + } + + config = PIN_CONF_PACKED(mode, arg); + return gpio_do_set_config(gc, offset, config); } static int gpio_set_bias(struct gpio_chip *chip, struct gpio_desc *desc) @@ -3277,7 +3297,7 @@ int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce) chip = desc->gdev->chip; config = pinconf_to_config_packed(PIN_CONFIG_INPUT_DEBOUNCE, debounce); - return gpio_set_config(chip, gpio_chip_hwgpio(desc), config); + return gpio_do_set_config(chip, gpio_chip_hwgpio(desc), config); } EXPORT_SYMBOL_GPL(gpiod_set_debounce); @@ -3311,7 +3331,7 @@ int gpiod_set_transitory(struct gpio_desc *desc, bool transitory) packed = pinconf_to_config_packed(PIN_CONFIG_PERSIST_STATE, !transitory); gpio = gpio_chip_hwgpio(desc); - rc = gpio_set_config(chip, gpio, packed); + rc = gpio_do_set_config(chip, gpio, packed); if (rc == -ENOTSUPP) { dev_dbg(&desc->gdev->dev, "Persistence not supported for GPIO %d\n", gpio); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pmu.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pmu.c index 07914e34bc25..1311d6aec5d4 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pmu.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pmu.c @@ -52,7 +52,7 @@ static int amdgpu_perf_event_init(struct perf_event *event) return -ENOENT; /* update the hw_perf_event struct with config data */ - hwc->conf = event->attr.config; + hwc->config = event->attr.config; return 0; } @@ -74,9 +74,9 @@ static void amdgpu_perf_start(struct perf_event *event, int flags) switch (pe->pmu_perf_type) { case PERF_TYPE_AMDGPU_DF: if (!(flags & PERF_EF_RELOAD)) - pe->adev->df.funcs->pmc_start(pe->adev, hwc->conf, 1); + pe->adev->df.funcs->pmc_start(pe->adev, hwc->config, 1); - pe->adev->df.funcs->pmc_start(pe->adev, hwc->conf, 0); + pe->adev->df.funcs->pmc_start(pe->adev, hwc->config, 0); break; default: break; @@ -101,7 +101,7 @@ static void amdgpu_perf_read(struct perf_event *event) switch (pe->pmu_perf_type) { case PERF_TYPE_AMDGPU_DF: - pe->adev->df.funcs->pmc_get_count(pe->adev, hwc->conf, + pe->adev->df.funcs->pmc_get_count(pe->adev, hwc->config, &count); break; default: @@ -126,7 +126,7 @@ static void amdgpu_perf_stop(struct perf_event *event, int flags) switch (pe->pmu_perf_type) { case PERF_TYPE_AMDGPU_DF: - pe->adev->df.funcs->pmc_stop(pe->adev, hwc->conf, 0); + pe->adev->df.funcs->pmc_stop(pe->adev, hwc->config, 0); break; default: break; @@ -156,7 +156,8 @@ static int amdgpu_perf_add(struct perf_event *event, int flags) switch (pe->pmu_perf_type) { case PERF_TYPE_AMDGPU_DF: - retval = pe->adev->df.funcs->pmc_start(pe->adev, hwc->conf, 1); + retval = pe->adev->df.funcs->pmc_start(pe->adev, + hwc->config, 1); break; default: return 0; @@ -184,7 +185,7 @@ static void amdgpu_perf_del(struct perf_event *event, int flags) switch (pe->pmu_perf_type) { case PERF_TYPE_AMDGPU_DF: - pe->adev->df.funcs->pmc_stop(pe->adev, hwc->conf, 1); + pe->adev->df.funcs->pmc_stop(pe->adev, hwc->config, 1); break; default: break; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h index d6deb0eb1e15..6fe057329de2 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.h @@ -179,6 +179,7 @@ struct amdgpu_vcn_inst { struct amdgpu_irq_src irq; struct amdgpu_vcn_reg external; struct amdgpu_bo *dpg_sram_bo; + struct dpg_pause_state pause_state; void *dpg_sram_cpu_addr; uint64_t dpg_sram_gpu_addr; uint32_t *dpg_sram_curr_addr; @@ -190,8 +191,6 @@ struct amdgpu_vcn { const struct firmware *fw; /* VCN firmware */ unsigned num_enc_rings; enum amd_powergating_state cur_state; - struct dpg_pause_state pause_state; - bool indirect_sram; uint8_t num_vcn_inst; diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c index 90f64b8bc358..b33a4eb39193 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c @@ -4374,9 +4374,17 @@ static int gfx_v9_0_ecc_late_init(void *handle) struct amdgpu_device *adev = (struct amdgpu_device *)handle; int r; - r = gfx_v9_0_do_edc_gds_workarounds(adev); - if (r) - return r; + /* + * Temp workaround to fix the issue that CP firmware fails to + * update read pointer when CPDMA is writing clearing operation + * to GDS in suspend/resume sequence on several cards. So just + * limit this operation in cold boot sequence. + */ + if (!adev->in_suspend) { + r = gfx_v9_0_do_edc_gds_workarounds(adev); + if (r) + return r; + } /* requires IBs so do in late init after IB pool is initialized */ r = gfx_v9_0_do_edc_gpr_workarounds(adev); diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c index 1a24fadd30e2..71f61afdc655 100644 --- a/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c +++ b/drivers/gpu/drm/amd/amdgpu/vcn_v1_0.c @@ -1207,9 +1207,10 @@ static int vcn_v1_0_pause_dpg_mode(struct amdgpu_device *adev, struct amdgpu_ring *ring; /* pause/unpause if state is changed */ - if (adev->vcn.pause_state.fw_based != new_state->fw_based) { + if (adev->vcn.inst[inst_idx].pause_state.fw_based != new_state->fw_based) { DRM_DEBUG("dpg pause state changed %d:%d -> %d:%d", - adev->vcn.pause_state.fw_based, adev->vcn.pause_state.jpeg, + adev->vcn.inst[inst_idx].pause_state.fw_based, + adev->vcn.inst[inst_idx].pause_state.jpeg, new_state->fw_based, new_state->jpeg); reg_data = RREG32_SOC15(UVD, 0, mmUVD_DPG_PAUSE) & @@ -1258,13 +1259,14 @@ static int vcn_v1_0_pause_dpg_mode(struct amdgpu_device *adev, reg_data &= ~UVD_DPG_PAUSE__NJ_PAUSE_DPG_REQ_MASK; WREG32_SOC15(UVD, 0, mmUVD_DPG_PAUSE, reg_data); } - adev->vcn.pause_state.fw_based = new_state->fw_based; + adev->vcn.inst[inst_idx].pause_state.fw_based = new_state->fw_based; } /* pause/unpause if state is changed */ - if (adev->vcn.pause_state.jpeg != new_state->jpeg) { + if (adev->vcn.inst[inst_idx].pause_state.jpeg != new_state->jpeg) { DRM_DEBUG("dpg pause state changed %d:%d -> %d:%d", - adev->vcn.pause_state.fw_based, adev->vcn.pause_state.jpeg, + adev->vcn.inst[inst_idx].pause_state.fw_based, + adev->vcn.inst[inst_idx].pause_state.jpeg, new_state->fw_based, new_state->jpeg); reg_data = RREG32_SOC15(UVD, 0, mmUVD_DPG_PAUSE) & @@ -1318,7 +1320,7 @@ static int vcn_v1_0_pause_dpg_mode(struct amdgpu_device *adev, reg_data &= ~UVD_DPG_PAUSE__JPEG_PAUSE_DPG_REQ_MASK; WREG32_SOC15(UVD, 0, mmUVD_DPG_PAUSE, reg_data); } - adev->vcn.pause_state.jpeg = new_state->jpeg; + adev->vcn.inst[inst_idx].pause_state.jpeg = new_state->jpeg; } return 0; diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c b/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c index 4f7216788f11..c387c81f8695 100644 --- a/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c +++ b/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c @@ -1137,9 +1137,9 @@ static int vcn_v2_0_pause_dpg_mode(struct amdgpu_device *adev, int ret_code; /* pause/unpause if state is changed */ - if (adev->vcn.pause_state.fw_based != new_state->fw_based) { + if (adev->vcn.inst[inst_idx].pause_state.fw_based != new_state->fw_based) { DRM_DEBUG("dpg pause state changed %d -> %d", - adev->vcn.pause_state.fw_based, new_state->fw_based); + adev->vcn.inst[inst_idx].pause_state.fw_based, new_state->fw_based); reg_data = RREG32_SOC15(UVD, 0, mmUVD_DPG_PAUSE) & (~UVD_DPG_PAUSE__NJ_PAUSE_DPG_ACK_MASK); @@ -1185,7 +1185,7 @@ static int vcn_v2_0_pause_dpg_mode(struct amdgpu_device *adev, reg_data &= ~UVD_DPG_PAUSE__NJ_PAUSE_DPG_REQ_MASK; WREG32_SOC15(UVD, 0, mmUVD_DPG_PAUSE, reg_data); } - adev->vcn.pause_state.fw_based = new_state->fw_based; + adev->vcn.inst[inst_idx].pause_state.fw_based = new_state->fw_based; } return 0; diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c b/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c index 70fae7977f8f..2d64ba1adf99 100644 --- a/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c +++ b/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c @@ -1367,9 +1367,9 @@ static int vcn_v2_5_pause_dpg_mode(struct amdgpu_device *adev, int ret_code; /* pause/unpause if state is changed */ - if (adev->vcn.pause_state.fw_based != new_state->fw_based) { + if (adev->vcn.inst[inst_idx].pause_state.fw_based != new_state->fw_based) { DRM_DEBUG("dpg pause state changed %d -> %d", - adev->vcn.pause_state.fw_based, new_state->fw_based); + adev->vcn.inst[inst_idx].pause_state.fw_based, new_state->fw_based); reg_data = RREG32_SOC15(UVD, inst_idx, mmUVD_DPG_PAUSE) & (~UVD_DPG_PAUSE__NJ_PAUSE_DPG_ACK_MASK); @@ -1407,14 +1407,14 @@ static int vcn_v2_5_pause_dpg_mode(struct amdgpu_device *adev, RREG32_SOC15(UVD, inst_idx, mmUVD_SCRATCH2) & 0x7FFFFFFF); SOC15_WAIT_ON_RREG(UVD, inst_idx, mmUVD_POWER_STATUS, - 0x0, UVD_POWER_STATUS__UVD_POWER_STATUS_MASK, ret_code); + UVD_PGFSM_CONFIG__UVDM_UVDU_PWR_ON, UVD_POWER_STATUS__UVD_POWER_STATUS_MASK, ret_code); } } else { /* unpause dpg, no need to wait */ reg_data &= ~UVD_DPG_PAUSE__NJ_PAUSE_DPG_REQ_MASK; WREG32_SOC15(UVD, inst_idx, mmUVD_DPG_PAUSE, reg_data); } - adev->vcn.pause_state.fw_based = new_state->fw_based; + adev->vcn.inst[inst_idx].pause_state.fw_based = new_state->fw_based; } return 0; diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 279541517a99..63e8a12a74bc 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -8408,7 +8408,6 @@ bool amdgpu_dm_psr_enable(struct dc_stream_state *stream) /* Calculate number of static frames before generating interrupt to * enter PSR. */ - unsigned int frame_time_microsec = 1000000 / vsync_rate_hz; // Init fail safe of 2 frames static unsigned int num_frames_static = 2; @@ -8423,8 +8422,10 @@ bool amdgpu_dm_psr_enable(struct dc_stream_state *stream) * Calculate number of frames such that at least 30 ms of time has * passed. */ - if (vsync_rate_hz != 0) + if (vsync_rate_hz != 0) { + unsigned int frame_time_microsec = 1000000 / vsync_rate_hz; num_frames_static = (30000 / frame_time_microsec) + 1; + } params.triggers.cursor_update = true; params.triggers.overlay_update = true; diff --git a/drivers/gpu/drm/amd/display/dc/bios/command_table2.c b/drivers/gpu/drm/amd/display/dc/bios/command_table2.c index 629a07a2719b..c4ba6e84db65 100644 --- a/drivers/gpu/drm/amd/display/dc/bios/command_table2.c +++ b/drivers/gpu/drm/amd/display/dc/bios/command_table2.c @@ -711,10 +711,6 @@ static void enable_disp_power_gating_dmcub( power_gating.header.sub_type = DMUB_CMD__VBIOS_ENABLE_DISP_POWER_GATING; power_gating.power_gating.pwr = *pwr; - /* ATOM_ENABLE is old API in DMUB */ - if (power_gating.power_gating.pwr.enable == ATOM_ENABLE) - power_gating.power_gating.pwr.enable = ATOM_INIT; - dc_dmub_srv_cmd_queue(dmcub, &power_gating.header); dc_dmub_srv_cmd_execute(dmcub); dc_dmub_srv_wait_idle(dmcub); diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/Makefile b/drivers/gpu/drm/amd/display/dc/clk_mgr/Makefile index 3cd283195091..c0f6a8c7de7d 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/Makefile +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/Makefile @@ -87,6 +87,12 @@ AMD_DISPLAY_FILES += $(AMD_DAL_CLK_MGR_DCN20) ############################################################################### CLK_MGR_DCN21 = rn_clk_mgr.o rn_clk_mgr_vbios_smu.o +# prevent build errors regarding soft-float vs hard-float FP ABI tags +# this code is currently unused on ppc64, as it applies to Renoir APUs only +ifdef CONFIG_PPC64 +CFLAGS_$(AMDDALPATH)/dc/clk_mgr/dcn21/rn_clk_mgr.o := $(call cc-option,-mno-gnu-attribute) +endif + AMD_DAL_CLK_MGR_DCN21 = $(addprefix $(AMDDALPATH)/dc/clk_mgr/dcn21/,$(CLK_MGR_DCN21)) AMD_DISPLAY_FILES += $(AMD_DAL_CLK_MGR_DCN21) diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c index 495f01e9f2ca..49ce46b543ea 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c @@ -117,7 +117,7 @@ void dcn20_update_clocks_update_dpp_dto(struct clk_mgr_internal *clk_mgr, prev_dppclk_khz = clk_mgr->base.ctx->dc->current_state->res_ctx.pipe_ctx[i].plane_res.bw.dppclk_khz; - if (safe_to_lower || prev_dppclk_khz < dppclk_khz) { + if ((prev_dppclk_khz > dppclk_khz && safe_to_lower) || prev_dppclk_khz < dppclk_khz) { clk_mgr->dccg->funcs->update_dpp_dto( clk_mgr->dccg, dpp_inst, dppclk_khz); } diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c index 7ae4c06232dd..9ef3f7b91a1d 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c @@ -151,6 +151,12 @@ void rn_update_clocks(struct clk_mgr *clk_mgr_base, rn_vbios_smu_set_min_deep_sleep_dcfclk(clk_mgr, clk_mgr_base->clks.dcfclk_deep_sleep_khz); } + // workaround: Limit dppclk to 100Mhz to avoid lower eDP panel switch to plus 4K monitor underflow. + if (!IS_DIAG_DC(dc->ctx->dce_environment)) { + if (new_clocks->dppclk_khz < 100000) + new_clocks->dppclk_khz = 100000; + } + if (should_set_clock(safe_to_lower, new_clocks->dppclk_khz, clk_mgr->base.clks.dppclk_khz)) { if (clk_mgr->base.clks.dppclk_khz > new_clocks->dppclk_khz) dpp_clock_lowered = true; @@ -412,19 +418,19 @@ void build_watermark_ranges(struct clk_bw_params *bw_params, struct pp_smu_wm_ra ranges->reader_wm_sets[num_valid_sets].wm_inst = bw_params->wm_table.entries[i].wm_inst; ranges->reader_wm_sets[num_valid_sets].wm_type = bw_params->wm_table.entries[i].wm_type; - /* We will not select WM based on dcfclk, so leave it as unconstrained */ - ranges->reader_wm_sets[num_valid_sets].min_drain_clk_mhz = PP_SMU_WM_SET_RANGE_CLK_UNCONSTRAINED_MIN; - ranges->reader_wm_sets[num_valid_sets].max_drain_clk_mhz = PP_SMU_WM_SET_RANGE_CLK_UNCONSTRAINED_MAX; - /* fclk wil be used to select WM*/ + /* We will not select WM based on fclk, so leave it as unconstrained */ + ranges->reader_wm_sets[num_valid_sets].min_fill_clk_mhz = PP_SMU_WM_SET_RANGE_CLK_UNCONSTRAINED_MIN; + ranges->reader_wm_sets[num_valid_sets].max_fill_clk_mhz = PP_SMU_WM_SET_RANGE_CLK_UNCONSTRAINED_MAX; + /* dcfclk wil be used to select WM*/ if (ranges->reader_wm_sets[num_valid_sets].wm_type == WM_TYPE_PSTATE_CHG) { if (i == 0) - ranges->reader_wm_sets[num_valid_sets].min_fill_clk_mhz = 0; + ranges->reader_wm_sets[num_valid_sets].min_drain_clk_mhz = 0; else { /* add 1 to make it non-overlapping with next lvl */ - ranges->reader_wm_sets[num_valid_sets].min_fill_clk_mhz = bw_params->clk_table.entries[i - 1].fclk_mhz + 1; + ranges->reader_wm_sets[num_valid_sets].min_drain_clk_mhz = bw_params->clk_table.entries[i - 1].dcfclk_mhz + 1; } - ranges->reader_wm_sets[num_valid_sets].max_fill_clk_mhz = bw_params->clk_table.entries[i].fclk_mhz; + ranges->reader_wm_sets[num_valid_sets].max_drain_clk_mhz = bw_params->clk_table.entries[i].dcfclk_mhz; } else { /* unconstrained for memory retraining */ diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c b/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c index f1a5d2c6aa37..68c4049cbc2a 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c @@ -400,7 +400,7 @@ static bool acquire( { enum gpio_result result; - if (!is_engine_available(engine)) + if ((engine == NULL) || !is_engine_available(engine)) return false; result = dal_ddc_open(ddc, GPIO_MODE_HARDWARE, diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c index cfbbaffa8654..a444fed94184 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c @@ -572,7 +572,6 @@ void dcn20_plane_atomic_disable(struct dc *dc, struct pipe_ctx *pipe_ctx) dpp->funcs->dpp_dppclk_control(dpp, false, false); hubp->power_gated = true; - dc->optimized_required = false; /* We're powering off, no need to optimize */ hws->funcs.plane_atomic_power_down(dc, pipe_ctx->plane_res.dpp, diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c index 0d506d30d6b6..33d0a176841a 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c @@ -60,6 +60,7 @@ #include "dcn20/dcn20_dccg.h" #include "dcn21_hubbub.h" #include "dcn10/dcn10_resource.h" +#include "dce110/dce110_resource.h" #include "dcn20/dcn20_dwb.h" #include "dcn20/dcn20_mmhubbub.h" @@ -856,6 +857,7 @@ static const struct dc_debug_options debug_defaults_diags = { enum dcn20_clk_src_array_id { DCN20_CLK_SRC_PLL0, DCN20_CLK_SRC_PLL1, + DCN20_CLK_SRC_PLL2, DCN20_CLK_SRC_TOTAL_DCN21 }; @@ -1718,6 +1720,10 @@ static bool dcn21_resource_construct( dcn21_clock_source_create(ctx, ctx->dc_bios, CLOCK_SOURCE_COMBO_PHY_PLL1, &clk_src_regs[1], false); + pool->base.clock_sources[DCN20_CLK_SRC_PLL2] = + dcn21_clock_source_create(ctx, ctx->dc_bios, + CLOCK_SOURCE_COMBO_PHY_PLL2, + &clk_src_regs[2], false); pool->base.clk_src_count = DCN20_CLK_SRC_TOTAL_DCN21; diff --git a/drivers/gpu/drm/amd/powerplay/inc/smu_v11_0_pptable.h b/drivers/gpu/drm/amd/powerplay/inc/smu_v11_0_pptable.h index b2f96a101124..7a63cf8e85ed 100644 --- a/drivers/gpu/drm/amd/powerplay/inc/smu_v11_0_pptable.h +++ b/drivers/gpu/drm/amd/powerplay/inc/smu_v11_0_pptable.h @@ -39,21 +39,39 @@ #define SMU_11_0_PP_OVERDRIVE_VERSION 0x0800 #define SMU_11_0_PP_POWERSAVINGCLOCK_VERSION 0x0100 +enum SMU_11_0_ODFEATURE_CAP { + SMU_11_0_ODCAP_GFXCLK_LIMITS = 0, + SMU_11_0_ODCAP_GFXCLK_CURVE, + SMU_11_0_ODCAP_UCLK_MAX, + SMU_11_0_ODCAP_POWER_LIMIT, + SMU_11_0_ODCAP_FAN_ACOUSTIC_LIMIT, + SMU_11_0_ODCAP_FAN_SPEED_MIN, + SMU_11_0_ODCAP_TEMPERATURE_FAN, + SMU_11_0_ODCAP_TEMPERATURE_SYSTEM, + SMU_11_0_ODCAP_MEMORY_TIMING_TUNE, + SMU_11_0_ODCAP_FAN_ZERO_RPM_CONTROL, + SMU_11_0_ODCAP_AUTO_UV_ENGINE, + SMU_11_0_ODCAP_AUTO_OC_ENGINE, + SMU_11_0_ODCAP_AUTO_OC_MEMORY, + SMU_11_0_ODCAP_FAN_CURVE, + SMU_11_0_ODCAP_COUNT, +}; + enum SMU_11_0_ODFEATURE_ID { - SMU_11_0_ODFEATURE_GFXCLK_LIMITS = 1 << 0, //GFXCLK Limit feature - SMU_11_0_ODFEATURE_GFXCLK_CURVE = 1 << 1, //GFXCLK Curve feature - SMU_11_0_ODFEATURE_UCLK_MAX = 1 << 2, //UCLK Limit feature - SMU_11_0_ODFEATURE_POWER_LIMIT = 1 << 3, //Power Limit feature - SMU_11_0_ODFEATURE_FAN_ACOUSTIC_LIMIT = 1 << 4, //Fan Acoustic RPM feature - SMU_11_0_ODFEATURE_FAN_SPEED_MIN = 1 << 5, //Minimum Fan Speed feature - SMU_11_0_ODFEATURE_TEMPERATURE_FAN = 1 << 6, //Fan Target Temperature Limit feature - SMU_11_0_ODFEATURE_TEMPERATURE_SYSTEM = 1 << 7, //Operating Temperature Limit feature - SMU_11_0_ODFEATURE_MEMORY_TIMING_TUNE = 1 << 8, //AC Timing Tuning feature - SMU_11_0_ODFEATURE_FAN_ZERO_RPM_CONTROL = 1 << 9, //Zero RPM feature - SMU_11_0_ODFEATURE_AUTO_UV_ENGINE = 1 << 10, //Auto Under Volt GFXCLK feature - SMU_11_0_ODFEATURE_AUTO_OC_ENGINE = 1 << 11, //Auto Over Clock GFXCLK feature - SMU_11_0_ODFEATURE_AUTO_OC_MEMORY = 1 << 12, //Auto Over Clock MCLK feature - SMU_11_0_ODFEATURE_FAN_CURVE = 1 << 13, //VICTOR TODO + SMU_11_0_ODFEATURE_GFXCLK_LIMITS = 1 << SMU_11_0_ODCAP_GFXCLK_LIMITS, //GFXCLK Limit feature + SMU_11_0_ODFEATURE_GFXCLK_CURVE = 1 << SMU_11_0_ODCAP_GFXCLK_CURVE, //GFXCLK Curve feature + SMU_11_0_ODFEATURE_UCLK_MAX = 1 << SMU_11_0_ODCAP_UCLK_MAX, //UCLK Limit feature + SMU_11_0_ODFEATURE_POWER_LIMIT = 1 << SMU_11_0_ODCAP_POWER_LIMIT, //Power Limit feature + SMU_11_0_ODFEATURE_FAN_ACOUSTIC_LIMIT = 1 << SMU_11_0_ODCAP_FAN_ACOUSTIC_LIMIT, //Fan Acoustic RPM feature + SMU_11_0_ODFEATURE_FAN_SPEED_MIN = 1 << SMU_11_0_ODCAP_FAN_SPEED_MIN, //Minimum Fan Speed feature + SMU_11_0_ODFEATURE_TEMPERATURE_FAN = 1 << SMU_11_0_ODCAP_TEMPERATURE_FAN, //Fan Target Temperature Limit feature + SMU_11_0_ODFEATURE_TEMPERATURE_SYSTEM = 1 << SMU_11_0_ODCAP_TEMPERATURE_SYSTEM, //Operating Temperature Limit feature + SMU_11_0_ODFEATURE_MEMORY_TIMING_TUNE = 1 << SMU_11_0_ODCAP_MEMORY_TIMING_TUNE, //AC Timing Tuning feature + SMU_11_0_ODFEATURE_FAN_ZERO_RPM_CONTROL = 1 << SMU_11_0_ODCAP_FAN_ZERO_RPM_CONTROL, //Zero RPM feature + SMU_11_0_ODFEATURE_AUTO_UV_ENGINE = 1 << SMU_11_0_ODCAP_AUTO_UV_ENGINE, //Auto Under Volt GFXCLK feature + SMU_11_0_ODFEATURE_AUTO_OC_ENGINE = 1 << SMU_11_0_ODCAP_AUTO_OC_ENGINE, //Auto Over Clock GFXCLK feature + SMU_11_0_ODFEATURE_AUTO_OC_MEMORY = 1 << SMU_11_0_ODCAP_AUTO_OC_MEMORY, //Auto Over Clock MCLK feature + SMU_11_0_ODFEATURE_FAN_CURVE = 1 << SMU_11_0_ODCAP_FAN_CURVE, //Fan Curve feature SMU_11_0_ODFEATURE_COUNT = 14, }; #define SMU_11_0_MAX_ODFEATURE 32 //Maximum Number of OD Features diff --git a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c index 19a9846b730e..0d73a49166af 100644 --- a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c +++ b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c @@ -736,9 +736,9 @@ static bool navi10_is_support_fine_grained_dpm(struct smu_context *smu, enum smu return dpm_desc->SnapToDiscrete == 0 ? true : false; } -static inline bool navi10_od_feature_is_supported(struct smu_11_0_overdrive_table *od_table, enum SMU_11_0_ODFEATURE_ID feature) +static inline bool navi10_od_feature_is_supported(struct smu_11_0_overdrive_table *od_table, enum SMU_11_0_ODFEATURE_CAP cap) { - return od_table->cap[feature]; + return od_table->cap[cap]; } static void navi10_od_setting_get_range(struct smu_11_0_overdrive_table *od_table, @@ -846,7 +846,7 @@ static int navi10_print_clk_levels(struct smu_context *smu, case SMU_OD_SCLK: if (!smu->od_enabled || !od_table || !od_settings) break; - if (!navi10_od_feature_is_supported(od_settings, SMU_11_0_ODFEATURE_GFXCLK_LIMITS)) + if (!navi10_od_feature_is_supported(od_settings, SMU_11_0_ODCAP_GFXCLK_LIMITS)) break; size += sprintf(buf + size, "OD_SCLK:\n"); size += sprintf(buf + size, "0: %uMhz\n1: %uMhz\n", od_table->GfxclkFmin, od_table->GfxclkFmax); @@ -854,7 +854,7 @@ static int navi10_print_clk_levels(struct smu_context *smu, case SMU_OD_MCLK: if (!smu->od_enabled || !od_table || !od_settings) break; - if (!navi10_od_feature_is_supported(od_settings, SMU_11_0_ODFEATURE_UCLK_MAX)) + if (!navi10_od_feature_is_supported(od_settings, SMU_11_0_ODCAP_UCLK_MAX)) break; size += sprintf(buf + size, "OD_MCLK:\n"); size += sprintf(buf + size, "1: %uMHz\n", od_table->UclkFmax); @@ -862,7 +862,7 @@ static int navi10_print_clk_levels(struct smu_context *smu, case SMU_OD_VDDC_CURVE: if (!smu->od_enabled || !od_table || !od_settings) break; - if (!navi10_od_feature_is_supported(od_settings, SMU_11_0_ODFEATURE_GFXCLK_CURVE)) + if (!navi10_od_feature_is_supported(od_settings, SMU_11_0_ODCAP_GFXCLK_CURVE)) break; size += sprintf(buf + size, "OD_VDDC_CURVE:\n"); for (i = 0; i < 3; i++) { @@ -887,7 +887,7 @@ static int navi10_print_clk_levels(struct smu_context *smu, break; size = sprintf(buf, "%s:\n", "OD_RANGE"); - if (navi10_od_feature_is_supported(od_settings, SMU_11_0_ODFEATURE_GFXCLK_LIMITS)) { + if (navi10_od_feature_is_supported(od_settings, SMU_11_0_ODCAP_GFXCLK_LIMITS)) { navi10_od_setting_get_range(od_settings, SMU_11_0_ODSETTING_GFXCLKFMIN, &min_value, NULL); navi10_od_setting_get_range(od_settings, SMU_11_0_ODSETTING_GFXCLKFMAX, @@ -896,14 +896,14 @@ static int navi10_print_clk_levels(struct smu_context *smu, min_value, max_value); } - if (navi10_od_feature_is_supported(od_settings, SMU_11_0_ODFEATURE_UCLK_MAX)) { + if (navi10_od_feature_is_supported(od_settings, SMU_11_0_ODCAP_UCLK_MAX)) { navi10_od_setting_get_range(od_settings, SMU_11_0_ODSETTING_UCLKFMAX, &min_value, &max_value); size += sprintf(buf + size, "MCLK: %7uMhz %10uMhz\n", min_value, max_value); } - if (navi10_od_feature_is_supported(od_settings, SMU_11_0_ODFEATURE_GFXCLK_CURVE)) { + if (navi10_od_feature_is_supported(od_settings, SMU_11_0_ODCAP_GFXCLK_CURVE)) { navi10_od_setting_get_range(od_settings, SMU_11_0_ODSETTING_VDDGFXCURVEFREQ_P1, &min_value, &max_value); size += sprintf(buf + size, "VDDC_CURVE_SCLK[0]: %7uMhz %10uMhz\n", @@ -2056,7 +2056,7 @@ static int navi10_od_edit_dpm_table(struct smu_context *smu, enum PP_OD_DPM_TABL switch (type) { case PP_OD_EDIT_SCLK_VDDC_TABLE: - if (!navi10_od_feature_is_supported(od_settings, SMU_11_0_ODFEATURE_GFXCLK_LIMITS)) { + if (!navi10_od_feature_is_supported(od_settings, SMU_11_0_ODCAP_GFXCLK_LIMITS)) { pr_warn("GFXCLK_LIMITS not supported!\n"); return -ENOTSUPP; } @@ -2102,7 +2102,7 @@ static int navi10_od_edit_dpm_table(struct smu_context *smu, enum PP_OD_DPM_TABL } break; case PP_OD_EDIT_MCLK_VDDC_TABLE: - if (!navi10_od_feature_is_supported(od_settings, SMU_11_0_ODFEATURE_UCLK_MAX)) { + if (!navi10_od_feature_is_supported(od_settings, SMU_11_0_ODCAP_UCLK_MAX)) { pr_warn("UCLK_MAX not supported!\n"); return -ENOTSUPP; } @@ -2143,7 +2143,7 @@ static int navi10_od_edit_dpm_table(struct smu_context *smu, enum PP_OD_DPM_TABL } break; case PP_OD_EDIT_VDDC_CURVE: - if (!navi10_od_feature_is_supported(od_settings, SMU_11_0_ODFEATURE_GFXCLK_CURVE)) { + if (!navi10_od_feature_is_supported(od_settings, SMU_11_0_ODCAP_GFXCLK_CURVE)) { pr_warn("GFXCLK_CURVE not supported!\n"); return -ENOTSUPP; } diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index 20cdaf3146b8..cce0b1bba591 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -3838,7 +3838,8 @@ drm_dp_mst_process_up_req(struct drm_dp_mst_topology_mgr *mgr, else if (msg->req_type == DP_RESOURCE_STATUS_NOTIFY) guid = msg->u.resource_stat.guid; - mstb = drm_dp_get_mst_branch_device_by_guid(mgr, guid); + if (guid) + mstb = drm_dp_get_mst_branch_device_by_guid(mgr, guid); } else { mstb = drm_dp_get_mst_branch_device(mgr, hdr->lct, hdr->rad); } diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 99769d6c9f84..805fb004c8eb 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3211,7 +3211,7 @@ static u8 *drm_find_cea_extension(const struct edid *edid) return cea; } -static const struct drm_display_mode *cea_mode_for_vic(u8 vic) +static __always_inline const struct drm_display_mode *cea_mode_for_vic(u8 vic) { BUILD_BUG_ON(1 + ARRAY_SIZE(edid_cea_modes_1) - 1 != 127); BUILD_BUG_ON(193 + ARRAY_SIZE(edid_cea_modes_193) - 1 != 219); diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index 8beac06e3f10..ef4017a1baba 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -357,14 +357,16 @@ parse_generic_dtd(struct drm_i915_private *dev_priv, panel_fixed_mode->hdisplay + dtd->hfront_porch; panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start + dtd->hsync; - panel_fixed_mode->htotal = panel_fixed_mode->hsync_end; + panel_fixed_mode->htotal = + panel_fixed_mode->hdisplay + dtd->hblank; panel_fixed_mode->vdisplay = dtd->vactive; panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay + dtd->vfront_porch; panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start + dtd->vsync; - panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end; + panel_fixed_mode->vtotal = + panel_fixed_mode->vdisplay + dtd->vblank; panel_fixed_mode->clock = dtd->pixel_clock; panel_fixed_mode->width_mm = dtd->width_mm; diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 19ea842cfd84..064dd99bbc49 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -12366,6 +12366,7 @@ static int icl_check_nv12_planes(struct intel_crtc_state *crtc_state) /* Copy parameters to slave plane */ linked_state->ctl = plane_state->ctl | PLANE_CTL_YUV420_Y_PLANE; linked_state->color_ctl = plane_state->color_ctl; + linked_state->view = plane_state->view; memcpy(linked_state->color_plane, plane_state->color_plane, sizeof(linked_state->color_plane)); @@ -14476,37 +14477,23 @@ static int intel_atomic_check_crtcs(struct intel_atomic_state *state) return 0; } -static bool intel_cpu_transcoder_needs_modeset(struct intel_atomic_state *state, - enum transcoder transcoder) +static bool intel_cpu_transcoders_need_modeset(struct intel_atomic_state *state, + u8 transcoders) { - struct intel_crtc_state *new_crtc_state; + const struct intel_crtc_state *new_crtc_state; struct intel_crtc *crtc; int i; - for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) - if (new_crtc_state->cpu_transcoder == transcoder) - return needs_modeset(new_crtc_state); + for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) { + if (new_crtc_state->hw.enable && + transcoders & BIT(new_crtc_state->cpu_transcoder) && + needs_modeset(new_crtc_state)) + return true; + } return false; } -static void -intel_modeset_synced_crtcs(struct intel_atomic_state *state, - u8 transcoders) -{ - struct intel_crtc_state *new_crtc_state; - struct intel_crtc *crtc; - int i; - - for_each_new_intel_crtc_in_state(state, crtc, - new_crtc_state, i) { - if (transcoders & BIT(new_crtc_state->cpu_transcoder)) { - new_crtc_state->uapi.mode_changed = true; - new_crtc_state->update_pipe = false; - } - } -} - static int intel_modeset_all_tiles(struct intel_atomic_state *state, int tile_grp_id) { @@ -14662,15 +14649,20 @@ static int intel_atomic_check(struct drm_device *dev, if (intel_dp_mst_is_slave_trans(new_crtc_state)) { enum transcoder master = new_crtc_state->mst_master_transcoder; - if (intel_cpu_transcoder_needs_modeset(state, master)) { + if (intel_cpu_transcoders_need_modeset(state, BIT(master))) { new_crtc_state->uapi.mode_changed = true; new_crtc_state->update_pipe = false; } - } else if (is_trans_port_sync_mode(new_crtc_state)) { + } + + if (is_trans_port_sync_mode(new_crtc_state)) { u8 trans = new_crtc_state->sync_mode_slaves_mask | BIT(new_crtc_state->master_transcoder); - intel_modeset_synced_crtcs(state, trans); + if (intel_cpu_transcoders_need_modeset(state, trans)) { + new_crtc_state->uapi.mode_changed = true; + new_crtc_state->update_pipe = false; + } } } diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c index 89fb0d90b694..04f953ba8f00 100644 --- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c +++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c @@ -384,6 +384,7 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data) return data; } +#ifdef CONFIG_ACPI static int i2c_adapter_lookup(struct acpi_resource *ares, void *data) { struct i2c_adapter_lookup *lookup = data; @@ -393,8 +394,7 @@ static int i2c_adapter_lookup(struct acpi_resource *ares, void *data) acpi_handle adapter_handle; acpi_status status; - if (intel_dsi->i2c_bus_num >= 0 || - !i2c_acpi_get_i2c_resource(ares, &sb)) + if (!i2c_acpi_get_i2c_resource(ares, &sb)) return 1; if (lookup->slave_addr != sb->slave_address) @@ -413,14 +413,41 @@ static int i2c_adapter_lookup(struct acpi_resource *ares, void *data) return 1; } -static const u8 *mipi_exec_i2c(struct intel_dsi *intel_dsi, const u8 *data) +static void i2c_acpi_find_adapter(struct intel_dsi *intel_dsi, + const u16 slave_addr) { struct drm_device *drm_dev = intel_dsi->base.base.dev; struct device *dev = &drm_dev->pdev->dev; - struct i2c_adapter *adapter; struct acpi_device *acpi_dev; struct list_head resource_list; struct i2c_adapter_lookup lookup; + + acpi_dev = ACPI_COMPANION(dev); + if (acpi_dev) { + memset(&lookup, 0, sizeof(lookup)); + lookup.slave_addr = slave_addr; + lookup.intel_dsi = intel_dsi; + lookup.dev_handle = acpi_device_handle(acpi_dev); + + INIT_LIST_HEAD(&resource_list); + acpi_dev_get_resources(acpi_dev, &resource_list, + i2c_adapter_lookup, + &lookup); + acpi_dev_free_resource_list(&resource_list); + } +} +#else +static inline void i2c_acpi_find_adapter(struct intel_dsi *intel_dsi, + const u16 slave_addr) +{ +} +#endif + +static const u8 *mipi_exec_i2c(struct intel_dsi *intel_dsi, const u8 *data) +{ + struct drm_device *drm_dev = intel_dsi->base.base.dev; + struct device *dev = &drm_dev->pdev->dev; + struct i2c_adapter *adapter; struct i2c_msg msg; int ret; u8 vbt_i2c_bus_num = *(data + 2); @@ -431,20 +458,7 @@ static const u8 *mipi_exec_i2c(struct intel_dsi *intel_dsi, const u8 *data) if (intel_dsi->i2c_bus_num < 0) { intel_dsi->i2c_bus_num = vbt_i2c_bus_num; - - acpi_dev = ACPI_COMPANION(dev); - if (acpi_dev) { - memset(&lookup, 0, sizeof(lookup)); - lookup.slave_addr = slave_addr; - lookup.intel_dsi = intel_dsi; - lookup.dev_handle = acpi_device_handle(acpi_dev); - - INIT_LIST_HEAD(&resource_list); - acpi_dev_get_resources(acpi_dev, &resource_list, - i2c_adapter_lookup, - &lookup); - acpi_dev_free_resource_list(&resource_list); - } + i2c_acpi_find_adapter(intel_dsi, slave_addr); } adapter = i2c_get_adapter(intel_dsi->i2c_bus_num); diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c index d5a0f5ae4a8b..60c984e10c4a 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c @@ -1981,9 +1981,20 @@ static int __eb_parse(struct dma_fence_work *work) pw->trampoline); } +static void __eb_parse_release(struct dma_fence_work *work) +{ + struct eb_parse_work *pw = container_of(work, typeof(*pw), base); + + if (pw->trampoline) + i915_active_release(&pw->trampoline->active); + i915_active_release(&pw->shadow->active); + i915_active_release(&pw->batch->active); +} + static const struct dma_fence_work_ops eb_parse_ops = { .name = "eb_parse", .work = __eb_parse, + .release = __eb_parse_release, }; static int eb_parse_pipeline(struct i915_execbuffer *eb, @@ -1997,6 +2008,20 @@ static int eb_parse_pipeline(struct i915_execbuffer *eb, if (!pw) return -ENOMEM; + err = i915_active_acquire(&eb->batch->active); + if (err) + goto err_free; + + err = i915_active_acquire(&shadow->active); + if (err) + goto err_batch; + + if (trampoline) { + err = i915_active_acquire(&trampoline->active); + if (err) + goto err_shadow; + } + dma_fence_work_init(&pw->base, &eb_parse_ops); pw->engine = eb->engine; @@ -2006,7 +2031,9 @@ static int eb_parse_pipeline(struct i915_execbuffer *eb, pw->shadow = shadow; pw->trampoline = trampoline; - dma_resv_lock(pw->batch->resv, NULL); + err = dma_resv_lock_interruptible(pw->batch->resv, NULL); + if (err) + goto err_trampoline; err = dma_resv_reserve_shared(pw->batch->resv, 1); if (err) @@ -2034,6 +2061,14 @@ static int eb_parse_pipeline(struct i915_execbuffer *eb, err_batch_unlock: dma_resv_unlock(pw->batch->resv); +err_trampoline: + if (trampoline) + i915_active_release(&trampoline->active); +err_shadow: + i915_active_release(&shadow->active); +err_batch: + i915_active_release(&eb->batch->active); +err_free: kfree(pw); return err; } diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c index b9fdac2f9003..0b6a442108de 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c @@ -455,10 +455,11 @@ out: void i915_gem_object_release_mmap_offset(struct drm_i915_gem_object *obj) { - struct i915_mmap_offset *mmo; + struct i915_mmap_offset *mmo, *mn; spin_lock(&obj->mmo.lock); - list_for_each_entry(mmo, &obj->mmo.offsets, offset) { + rbtree_postorder_for_each_entry_safe(mmo, mn, + &obj->mmo.offsets, offset) { /* * vma_node_unmap for GTT mmaps handled already in * __i915_gem_object_release_mmap_gtt @@ -488,6 +489,67 @@ void i915_gem_object_release_mmap(struct drm_i915_gem_object *obj) } static struct i915_mmap_offset * +lookup_mmo(struct drm_i915_gem_object *obj, + enum i915_mmap_type mmap_type) +{ + struct rb_node *rb; + + spin_lock(&obj->mmo.lock); + rb = obj->mmo.offsets.rb_node; + while (rb) { + struct i915_mmap_offset *mmo = + rb_entry(rb, typeof(*mmo), offset); + + if (mmo->mmap_type == mmap_type) { + spin_unlock(&obj->mmo.lock); + return mmo; + } + + if (mmo->mmap_type < mmap_type) + rb = rb->rb_right; + else + rb = rb->rb_left; + } + spin_unlock(&obj->mmo.lock); + + return NULL; +} + +static struct i915_mmap_offset * +insert_mmo(struct drm_i915_gem_object *obj, struct i915_mmap_offset *mmo) +{ + struct rb_node *rb, **p; + + spin_lock(&obj->mmo.lock); + rb = NULL; + p = &obj->mmo.offsets.rb_node; + while (*p) { + struct i915_mmap_offset *pos; + + rb = *p; + pos = rb_entry(rb, typeof(*pos), offset); + + if (pos->mmap_type == mmo->mmap_type) { + spin_unlock(&obj->mmo.lock); + drm_vma_offset_remove(obj->base.dev->vma_offset_manager, + &mmo->vma_node); + kfree(mmo); + return pos; + } + + if (pos->mmap_type < mmo->mmap_type) + p = &rb->rb_right; + else + p = &rb->rb_left; + } + rb_link_node(&mmo->offset, rb, p); + rb_insert_color(&mmo->offset, &obj->mmo.offsets); + spin_unlock(&obj->mmo.lock); + + return mmo; +} + +static struct i915_mmap_offset * mmap_offset_attach(struct drm_i915_gem_object *obj, enum i915_mmap_type mmap_type, struct drm_file *file) @@ -496,20 +558,22 @@ mmap_offset_attach(struct drm_i915_gem_object *obj, struct i915_mmap_offset *mmo; int err; + mmo = lookup_mmo(obj, mmap_type); + if (mmo) + goto out; + mmo = kmalloc(sizeof(*mmo), GFP_KERNEL); if (!mmo) return ERR_PTR(-ENOMEM); mmo->obj = obj; - mmo->dev = obj->base.dev; - mmo->file = file; mmo->mmap_type = mmap_type; drm_vma_node_reset(&mmo->vma_node); - err = drm_vma_offset_add(mmo->dev->vma_offset_manager, &mmo->vma_node, - obj->base.size / PAGE_SIZE); + err = drm_vma_offset_add(obj->base.dev->vma_offset_manager, + &mmo->vma_node, obj->base.size / PAGE_SIZE); if (likely(!err)) - goto out; + goto insert; /* Attempt to reap some mmap space from dead objects */ err = intel_gt_retire_requests_timeout(&i915->gt, MAX_SCHEDULE_TIMEOUT); @@ -517,19 +581,17 @@ mmap_offset_attach(struct drm_i915_gem_object *obj, goto err; i915_gem_drain_freed_objects(i915); - err = drm_vma_offset_add(mmo->dev->vma_offset_manager, &mmo->vma_node, - obj->base.size / PAGE_SIZE); + err = drm_vma_offset_add(obj->base.dev->vma_offset_manager, + &mmo->vma_node, obj->base.size / PAGE_SIZE); if (err) goto err; +insert: + mmo = insert_mmo(obj, mmo); + GEM_BUG_ON(lookup_mmo(obj, mmap_type) != mmo); out: if (file) drm_vma_node_allow(&mmo->vma_node, file); - - spin_lock(&obj->mmo.lock); - list_add(&mmo->offset, &obj->mmo.offsets); - spin_unlock(&obj->mmo.lock); - return mmo; err: @@ -745,60 +807,43 @@ int i915_gem_mmap(struct file *filp, struct vm_area_struct *vma) struct drm_vma_offset_node *node; struct drm_file *priv = filp->private_data; struct drm_device *dev = priv->minor->dev; + struct drm_i915_gem_object *obj = NULL; struct i915_mmap_offset *mmo = NULL; - struct drm_gem_object *obj = NULL; struct file *anon; if (drm_dev_is_unplugged(dev)) return -ENODEV; + rcu_read_lock(); drm_vma_offset_lock_lookup(dev->vma_offset_manager); node = drm_vma_offset_exact_lookup_locked(dev->vma_offset_manager, vma->vm_pgoff, vma_pages(vma)); - if (likely(node)) { - mmo = container_of(node, struct i915_mmap_offset, - vma_node); - /* - * In our dependency chain, the drm_vma_offset_node - * depends on the validity of the mmo, which depends on - * the gem object. However the only reference we have - * at this point is the mmo (as the parent of the node). - * Try to check if the gem object was at least cleared. - */ - if (!mmo || !mmo->obj) { - drm_vma_offset_unlock_lookup(dev->vma_offset_manager); - return -EINVAL; - } + if (node && drm_vma_node_is_allowed(node, priv)) { /* * Skip 0-refcnted objects as it is in the process of being * destroyed and will be invalid when the vma manager lock * is released. */ - obj = &mmo->obj->base; - if (!kref_get_unless_zero(&obj->refcount)) - obj = NULL; + mmo = container_of(node, struct i915_mmap_offset, vma_node); + obj = i915_gem_object_get_rcu(mmo->obj); } drm_vma_offset_unlock_lookup(dev->vma_offset_manager); + rcu_read_unlock(); if (!obj) - return -EINVAL; - - if (!drm_vma_node_is_allowed(node, priv)) { - drm_gem_object_put_unlocked(obj); - return -EACCES; - } + return node ? -EACCES : -EINVAL; - if (i915_gem_object_is_readonly(to_intel_bo(obj))) { + if (i915_gem_object_is_readonly(obj)) { if (vma->vm_flags & VM_WRITE) { - drm_gem_object_put_unlocked(obj); + i915_gem_object_put(obj); return -EINVAL; } vma->vm_flags &= ~VM_MAYWRITE; } - anon = mmap_singleton(to_i915(obj->dev)); + anon = mmap_singleton(to_i915(dev)); if (IS_ERR(anon)) { - drm_gem_object_put_unlocked(obj); + i915_gem_object_put(obj); return PTR_ERR(anon); } diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c index 46bacc82ddc4..35985218bd85 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c @@ -63,7 +63,7 @@ void i915_gem_object_init(struct drm_i915_gem_object *obj, INIT_LIST_HEAD(&obj->lut_list); spin_lock_init(&obj->mmo.lock); - INIT_LIST_HEAD(&obj->mmo.offsets); + obj->mmo.offsets = RB_ROOT; init_rcu_head(&obj->rcu); @@ -100,8 +100,8 @@ void i915_gem_close_object(struct drm_gem_object *gem, struct drm_file *file) { struct drm_i915_gem_object *obj = to_intel_bo(gem); struct drm_i915_file_private *fpriv = file->driver_priv; + struct i915_mmap_offset *mmo, *mn; struct i915_lut_handle *lut, *ln; - struct i915_mmap_offset *mmo; LIST_HEAD(close); i915_gem_object_lock(obj); @@ -117,14 +117,8 @@ void i915_gem_close_object(struct drm_gem_object *gem, struct drm_file *file) i915_gem_object_unlock(obj); spin_lock(&obj->mmo.lock); - list_for_each_entry(mmo, &obj->mmo.offsets, offset) { - if (mmo->file != file) - continue; - - spin_unlock(&obj->mmo.lock); + rbtree_postorder_for_each_entry_safe(mmo, mn, &obj->mmo.offsets, offset) drm_vma_node_revoke(&mmo->vma_node, file); - spin_lock(&obj->mmo.lock); - } spin_unlock(&obj->mmo.lock); list_for_each_entry_safe(lut, ln, &close, obj_link) { @@ -203,12 +197,14 @@ static void __i915_gem_free_objects(struct drm_i915_private *i915, i915_gem_object_release_mmap(obj); - list_for_each_entry_safe(mmo, mn, &obj->mmo.offsets, offset) { + rbtree_postorder_for_each_entry_safe(mmo, mn, + &obj->mmo.offsets, + offset) { drm_vma_offset_remove(obj->base.dev->vma_offset_manager, &mmo->vma_node); kfree(mmo); } - INIT_LIST_HEAD(&obj->mmo.offsets); + obj->mmo.offsets = RB_ROOT; GEM_BUG_ON(atomic_read(&obj->bind_count)); GEM_BUG_ON(obj->userfault_count); diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h index db70a3306e59..9c86f2dea947 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h @@ -70,14 +70,22 @@ i915_gem_object_lookup_rcu(struct drm_file *file, u32 handle) } static inline struct drm_i915_gem_object * +i915_gem_object_get_rcu(struct drm_i915_gem_object *obj) +{ + if (obj && !kref_get_unless_zero(&obj->base.refcount)) + obj = NULL; + + return obj; +} + +static inline struct drm_i915_gem_object * i915_gem_object_lookup(struct drm_file *file, u32 handle) { struct drm_i915_gem_object *obj; rcu_read_lock(); obj = i915_gem_object_lookup_rcu(file, handle); - if (obj && !kref_get_unless_zero(&obj->base.refcount)) - obj = NULL; + obj = i915_gem_object_get_rcu(obj); rcu_read_unlock(); return obj; diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h index 88e268633fdc..f64ad77e6b1e 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h @@ -71,13 +71,11 @@ enum i915_mmap_type { }; struct i915_mmap_offset { - struct drm_device *dev; struct drm_vma_offset_node vma_node; struct drm_i915_gem_object *obj; - struct drm_file *file; enum i915_mmap_type mmap_type; - struct list_head offset; + struct rb_node offset; }; struct drm_i915_gem_object { @@ -137,7 +135,7 @@ struct drm_i915_gem_object { struct { spinlock_t lock; /* Protects access to mmo offsets */ - struct list_head offsets; + struct rb_root offsets; } mmo; I915_SELFTEST_DECLARE(struct list_head st_link); diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c index 23137b2a8689..57e8a051ddc2 100644 --- a/drivers/gpu/drm/i915/gt/intel_context.c +++ b/drivers/gpu/drm/i915/gt/intel_context.c @@ -67,21 +67,18 @@ static int intel_context_active_acquire(struct intel_context *ce) { int err; - err = i915_active_acquire(&ce->active); - if (err) - return err; + __i915_active_acquire(&ce->active); + + if (intel_context_is_barrier(ce)) + return 0; /* Preallocate tracking nodes */ - if (!intel_context_is_barrier(ce)) { - err = i915_active_acquire_preallocate_barrier(&ce->active, - ce->engine); - if (err) { - i915_active_release(&ce->active); - return err; - } - } + err = i915_active_acquire_preallocate_barrier(&ce->active, + ce->engine); + if (err) + i915_active_release(&ce->active); - return 0; + return err; } static void intel_context_active_release(struct intel_context *ce) @@ -101,13 +98,19 @@ int __intel_context_do_pin(struct intel_context *ce) return err; } - if (mutex_lock_interruptible(&ce->pin_mutex)) - return -EINTR; + err = i915_active_acquire(&ce->active); + if (err) + return err; + + if (mutex_lock_interruptible(&ce->pin_mutex)) { + err = -EINTR; + goto out_release; + } - if (likely(!atomic_read(&ce->pin_count))) { + if (likely(!atomic_add_unless(&ce->pin_count, 1, 0))) { err = intel_context_active_acquire(ce); if (unlikely(err)) - goto err; + goto out_unlock; err = ce->ops->pin(ce); if (unlikely(err)) @@ -117,18 +120,19 @@ int __intel_context_do_pin(struct intel_context *ce) ce->ring->head, ce->ring->tail); smp_mb__before_atomic(); /* flush pin before it is visible */ + atomic_inc(&ce->pin_count); } - atomic_inc(&ce->pin_count); GEM_BUG_ON(!intel_context_is_pinned(ce)); /* no overflow! */ - - mutex_unlock(&ce->pin_mutex); - return 0; + GEM_BUG_ON(i915_active_is_idle(&ce->active)); + goto out_unlock; err_active: intel_context_active_release(ce); -err: +out_unlock: mutex_unlock(&ce->pin_mutex); +out_release: + i915_active_release(&ce->active); return err; } diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c index f451ef376548..06ff7695fa29 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c @@ -671,6 +671,7 @@ void intel_engine_init_active(struct intel_engine_cs *engine, unsigned int subclass) { INIT_LIST_HEAD(&engine->active.requests); + INIT_LIST_HEAD(&engine->active.hold); spin_lock_init(&engine->active.lock); lockdep_set_subclass(&engine->active.lock, subclass); @@ -1422,6 +1423,17 @@ static void print_request_ring(struct drm_printer *m, struct i915_request *rq) } } +static unsigned long list_count(struct list_head *list) +{ + struct list_head *pos; + unsigned long count = 0; + + list_for_each(pos, list) + count++; + + return count; +} + void intel_engine_dump(struct intel_engine_cs *engine, struct drm_printer *m, const char *header, ...) @@ -1491,6 +1503,7 @@ void intel_engine_dump(struct intel_engine_cs *engine, hexdump(m, rq->context->lrc_reg_state, PAGE_SIZE); } } + drm_printf(m, "\tOn hold?: %lu\n", list_count(&engine->active.hold)); spin_unlock_irqrestore(&engine->active.lock, flags); drm_printf(m, "\tMMIO base: 0x%08x\n", engine->mmio_base); diff --git a/drivers/gpu/drm/i915/gt/intel_engine_types.h b/drivers/gpu/drm/i915/gt/intel_engine_types.h index 350da59e605b..92be41a6903c 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_types.h +++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h @@ -295,6 +295,7 @@ struct intel_engine_cs { struct { spinlock_t lock; struct list_head requests; + struct list_head hold; /* ready requests, but on hold */ } active; struct llist_head barrier_tasks; diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index 0cf0f6fae675..a13a8c4b65ab 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -985,6 +985,8 @@ __unwind_incomplete_requests(struct intel_engine_cs *engine) GEM_BUG_ON(RB_EMPTY_ROOT(&engine->execlists.queue.rb_root)); list_move(&rq->sched.link, pl); + set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags); + active = rq; } else { struct intel_engine_cs *owner = rq->context->engine; @@ -1535,7 +1537,8 @@ static bool can_merge_rq(const struct i915_request *prev, return true; if (unlikely((prev->fence.flags ^ next->fence.flags) & - (I915_FENCE_FLAG_NOPREEMPT | I915_FENCE_FLAG_SENTINEL))) + (BIT(I915_FENCE_FLAG_NOPREEMPT) | + BIT(I915_FENCE_FLAG_SENTINEL)))) return false; if (!can_merge_ctx(prev->context, next->context)) @@ -1632,8 +1635,8 @@ static void defer_request(struct i915_request *rq, struct list_head * const pl) !i915_request_completed(rq)); GEM_BUG_ON(i915_request_is_active(w)); - if (list_empty(&w->sched.link)) - continue; /* Not yet submitted; unready */ + if (!i915_request_is_ready(w)) + continue; if (rq_prio(w) < rq_prio(rq)) continue; @@ -2351,6 +2354,310 @@ static void __execlists_submission_tasklet(struct intel_engine_cs *const engine) } } +static void __execlists_hold(struct i915_request *rq) +{ + LIST_HEAD(list); + + do { + struct i915_dependency *p; + + if (i915_request_is_active(rq)) + __i915_request_unsubmit(rq); + + RQ_TRACE(rq, "on hold\n"); + clear_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags); + list_move_tail(&rq->sched.link, &rq->engine->active.hold); + i915_request_set_hold(rq); + + list_for_each_entry(p, &rq->sched.waiters_list, wait_link) { + struct i915_request *w = + container_of(p->waiter, typeof(*w), sched); + + /* Leave semaphores spinning on the other engines */ + if (w->engine != rq->engine) + continue; + + if (!i915_request_is_ready(w)) + continue; + + if (i915_request_completed(w)) + continue; + + if (i915_request_on_hold(rq)) + continue; + + list_move_tail(&w->sched.link, &list); + } + + rq = list_first_entry_or_null(&list, typeof(*rq), sched.link); + } while (rq); +} + +static bool execlists_hold(struct intel_engine_cs *engine, + struct i915_request *rq) +{ + spin_lock_irq(&engine->active.lock); + + if (i915_request_completed(rq)) { /* too late! */ + rq = NULL; + goto unlock; + } + + if (rq->engine != engine) { /* preempted virtual engine */ + struct virtual_engine *ve = to_virtual_engine(rq->engine); + + /* + * intel_context_inflight() is only protected by virtue + * of process_csb() being called only by the tasklet (or + * directly from inside reset while the tasklet is suspended). + * Assert that neither of those are allowed to run while we + * poke at the request queues. + */ + GEM_BUG_ON(!reset_in_progress(&engine->execlists)); + + /* + * An unsubmitted request along a virtual engine will + * remain on the active (this) engine until we are able + * to process the context switch away (and so mark the + * context as no longer in flight). That cannot have happened + * yet, otherwise we would not be hanging! + */ + spin_lock(&ve->base.active.lock); + GEM_BUG_ON(intel_context_inflight(rq->context) != engine); + GEM_BUG_ON(ve->request != rq); + ve->request = NULL; + spin_unlock(&ve->base.active.lock); + i915_request_put(rq); + + rq->engine = engine; + } + + /* + * Transfer this request onto the hold queue to prevent it + * being resumbitted to HW (and potentially completed) before we have + * released it. Since we may have already submitted following + * requests, we need to remove those as well. + */ + GEM_BUG_ON(i915_request_on_hold(rq)); + GEM_BUG_ON(rq->engine != engine); + __execlists_hold(rq); + +unlock: + spin_unlock_irq(&engine->active.lock); + return rq; +} + +static bool hold_request(const struct i915_request *rq) +{ + struct i915_dependency *p; + + /* + * If one of our ancestors is on hold, we must also be on hold, + * otherwise we will bypass it and execute before it. + */ + list_for_each_entry(p, &rq->sched.signalers_list, signal_link) { + const struct i915_request *s = + container_of(p->signaler, typeof(*s), sched); + + if (s->engine != rq->engine) + continue; + + if (i915_request_on_hold(s)) + return true; + } + + return false; +} + +static void __execlists_unhold(struct i915_request *rq) +{ + LIST_HEAD(list); + + do { + struct i915_dependency *p; + + GEM_BUG_ON(!i915_request_on_hold(rq)); + GEM_BUG_ON(!i915_sw_fence_signaled(&rq->submit)); + + i915_request_clear_hold(rq); + list_move_tail(&rq->sched.link, + i915_sched_lookup_priolist(rq->engine, + rq_prio(rq))); + set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags); + RQ_TRACE(rq, "hold release\n"); + + /* Also release any children on this engine that are ready */ + list_for_each_entry(p, &rq->sched.waiters_list, wait_link) { + struct i915_request *w = + container_of(p->waiter, typeof(*w), sched); + + if (w->engine != rq->engine) + continue; + + if (!i915_request_on_hold(rq)) + continue; + + /* Check that no other parents are also on hold */ + if (hold_request(rq)) + continue; + + list_move_tail(&w->sched.link, &list); + } + + rq = list_first_entry_or_null(&list, typeof(*rq), sched.link); + } while (rq); +} + +static void execlists_unhold(struct intel_engine_cs *engine, + struct i915_request *rq) +{ + spin_lock_irq(&engine->active.lock); + + /* + * Move this request back to the priority queue, and all of its + * children and grandchildren that were suspended along with it. + */ + __execlists_unhold(rq); + + if (rq_prio(rq) > engine->execlists.queue_priority_hint) { + engine->execlists.queue_priority_hint = rq_prio(rq); + tasklet_hi_schedule(&engine->execlists.tasklet); + } + + spin_unlock_irq(&engine->active.lock); +} + +struct execlists_capture { + struct work_struct work; + struct i915_request *rq; + struct i915_gpu_coredump *error; +}; + +static void execlists_capture_work(struct work_struct *work) +{ + struct execlists_capture *cap = container_of(work, typeof(*cap), work); + const gfp_t gfp = GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN; + struct intel_engine_cs *engine = cap->rq->engine; + struct intel_gt_coredump *gt = cap->error->gt; + struct intel_engine_capture_vma *vma; + + /* Compress all the objects attached to the request, slow! */ + vma = intel_engine_coredump_add_request(gt->engine, cap->rq, gfp); + if (vma) { + struct i915_vma_compress *compress = + i915_vma_capture_prepare(gt); + + intel_engine_coredump_add_vma(gt->engine, vma, compress); + i915_vma_capture_finish(gt, compress); + } + + gt->simulated = gt->engine->simulated; + cap->error->simulated = gt->simulated; + + /* Publish the error state, and announce it to the world */ + i915_error_state_store(cap->error); + i915_gpu_coredump_put(cap->error); + + /* Return this request and all that depend upon it for signaling */ + execlists_unhold(engine, cap->rq); + i915_request_put(cap->rq); + + kfree(cap); +} + +static struct execlists_capture *capture_regs(struct intel_engine_cs *engine) +{ + const gfp_t gfp = GFP_ATOMIC | __GFP_NOWARN; + struct execlists_capture *cap; + + cap = kmalloc(sizeof(*cap), gfp); + if (!cap) + return NULL; + + cap->error = i915_gpu_coredump_alloc(engine->i915, gfp); + if (!cap->error) + goto err_cap; + + cap->error->gt = intel_gt_coredump_alloc(engine->gt, gfp); + if (!cap->error->gt) + goto err_gpu; + + cap->error->gt->engine = intel_engine_coredump_alloc(engine, gfp); + if (!cap->error->gt->engine) + goto err_gt; + + return cap; + +err_gt: + kfree(cap->error->gt); +err_gpu: + kfree(cap->error); +err_cap: + kfree(cap); + return NULL; +} + +static bool execlists_capture(struct intel_engine_cs *engine) +{ + struct execlists_capture *cap; + + if (!IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)) + return true; + + /* + * We need to _quickly_ capture the engine state before we reset. + * We are inside an atomic section (softirq) here and we are delaying + * the forced preemption event. + */ + cap = capture_regs(engine); + if (!cap) + return true; + + cap->rq = execlists_active(&engine->execlists); + GEM_BUG_ON(!cap->rq); + + rcu_read_lock(); + cap->rq = active_request(cap->rq->context->timeline, cap->rq); + cap->rq = i915_request_get_rcu(cap->rq); + rcu_read_unlock(); + if (!cap->rq) + goto err_free; + + /* + * Remove the request from the execlists queue, and take ownership + * of the request. We pass it to our worker who will _slowly_ compress + * all the pages the _user_ requested for debugging their batch, after + * which we return it to the queue for signaling. + * + * By removing them from the execlists queue, we also remove the + * requests from being processed by __unwind_incomplete_requests() + * during the intel_engine_reset(), and so they will *not* be replayed + * afterwards. + * + * Note that because we have not yet reset the engine at this point, + * it is possible for the request that we have identified as being + * guilty, did in fact complete and we will then hit an arbitration + * point allowing the outstanding preemption to succeed. The likelihood + * of that is very low (as capturing of the engine registers should be + * fast enough to run inside an irq-off atomic section!), so we will + * simply hold that request accountable for being non-preemptible + * long enough to force the reset. + */ + if (!execlists_hold(engine, cap->rq)) + goto err_rq; + + INIT_WORK(&cap->work, execlists_capture_work); + schedule_work(&cap->work); + return true; + +err_rq: + i915_request_put(cap->rq); +err_free: + i915_gpu_coredump_put(cap->error); + kfree(cap); + return false; +} + static noinline void preempt_reset(struct intel_engine_cs *engine) { const unsigned int bit = I915_RESET_ENGINE + engine->id; @@ -2368,7 +2675,12 @@ static noinline void preempt_reset(struct intel_engine_cs *engine) ENGINE_TRACE(engine, "preempt timeout %lu+%ums\n", READ_ONCE(engine->props.preempt_timeout_ms), jiffies_to_msecs(jiffies - engine->execlists.preempt.expires)); - intel_engine_reset(engine, "preemption time out"); + + ring_set_paused(engine, 1); /* Freeze the current request in place */ + if (execlists_capture(engine)) + intel_engine_reset(engine, "preemption time out"); + else + ring_set_paused(engine, 0); tasklet_enable(&engine->execlists.tasklet); clear_and_wake_up_bit(bit, lock); @@ -2430,11 +2742,12 @@ static void execlists_preempt(struct timer_list *timer) } static void queue_request(struct intel_engine_cs *engine, - struct i915_sched_node *node, - int prio) + struct i915_request *rq) { - GEM_BUG_ON(!list_empty(&node->link)); - list_add_tail(&node->link, i915_sched_lookup_priolist(engine, prio)); + GEM_BUG_ON(!list_empty(&rq->sched.link)); + list_add_tail(&rq->sched.link, + i915_sched_lookup_priolist(engine, rq_prio(rq))); + set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags); } static void __submit_queue_imm(struct intel_engine_cs *engine) @@ -2462,6 +2775,13 @@ static void submit_queue(struct intel_engine_cs *engine, __submit_queue_imm(engine); } +static bool ancestor_on_hold(const struct intel_engine_cs *engine, + const struct i915_request *rq) +{ + GEM_BUG_ON(i915_request_on_hold(rq)); + return !list_empty(&engine->active.hold) && hold_request(rq); +} + static void execlists_submit_request(struct i915_request *request) { struct intel_engine_cs *engine = request->engine; @@ -2470,12 +2790,17 @@ static void execlists_submit_request(struct i915_request *request) /* Will be called from irq-context when using foreign fences. */ spin_lock_irqsave(&engine->active.lock, flags); - queue_request(engine, &request->sched, rq_prio(request)); + if (unlikely(ancestor_on_hold(engine, request))) { + list_add_tail(&request->sched.link, &engine->active.hold); + i915_request_set_hold(request); + } else { + queue_request(engine, request); - GEM_BUG_ON(RB_EMPTY_ROOT(&engine->execlists.queue.rb_root)); - GEM_BUG_ON(list_empty(&request->sched.link)); + GEM_BUG_ON(RB_EMPTY_ROOT(&engine->execlists.queue.rb_root)); + GEM_BUG_ON(list_empty(&request->sched.link)); - submit_queue(engine, request); + submit_queue(engine, request); + } spin_unlock_irqrestore(&engine->active.lock, flags); } @@ -2531,7 +2856,6 @@ static void execlists_context_unpin(struct intel_context *ce) ce->engine); i915_gem_object_unpin_map(ce->state->obj); - intel_ring_reset(ce->ring, ce->ring->tail); } static void @@ -3325,6 +3649,10 @@ static void execlists_reset_cancel(struct intel_engine_cs *engine) i915_priolist_free(p); } + /* On-hold requests will be flushed to timeline upon their release */ + list_for_each_entry(rq, &engine->active.hold, sched.link) + mark_eio(rq); + /* Cancel all attached virtual engines */ while ((rb = rb_first_cached(&execlists->virtual))) { struct virtual_engine *ve = diff --git a/drivers/gpu/drm/i915/gt/mock_engine.c b/drivers/gpu/drm/i915/gt/mock_engine.c index a560b7eee2cd..f2806381733f 100644 --- a/drivers/gpu/drm/i915/gt/mock_engine.c +++ b/drivers/gpu/drm/i915/gt/mock_engine.c @@ -59,11 +59,26 @@ static struct intel_ring *mock_ring(struct intel_engine_cs *engine) ring->vaddr = (void *)(ring + 1); atomic_set(&ring->pin_count, 1); + ring->vma = i915_vma_alloc(); + if (!ring->vma) { + kfree(ring); + return NULL; + } + i915_active_init(&ring->vma->active, NULL, NULL); + intel_ring_update_space(ring); return ring; } +static void mock_ring_free(struct intel_ring *ring) +{ + i915_active_fini(&ring->vma->active); + i915_vma_free(ring->vma); + + kfree(ring); +} + static struct i915_request *first_request(struct mock_engine *engine) { return list_first_entry_or_null(&engine->hw_queue, @@ -121,7 +136,7 @@ static void mock_context_destroy(struct kref *ref) GEM_BUG_ON(intel_context_is_pinned(ce)); if (test_bit(CONTEXT_ALLOC_BIT, &ce->flags)) { - kfree(ce->ring); + mock_ring_free(ce->ring); mock_timeline_unpin(ce->timeline); } diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c index 15cda024e3e4..65718ca2326e 100644 --- a/drivers/gpu/drm/i915/gt/selftest_lrc.c +++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c @@ -285,6 +285,107 @@ static int live_unlite_preempt(void *arg) return live_unlite_restore(arg, I915_USER_PRIORITY(I915_PRIORITY_MAX)); } +static int live_hold_reset(void *arg) +{ + struct intel_gt *gt = arg; + struct intel_engine_cs *engine; + enum intel_engine_id id; + struct igt_spinner spin; + int err = 0; + + /* + * In order to support offline error capture for fast preempt reset, + * we need to decouple the guilty request and ensure that it and its + * descendents are not executed while the capture is in progress. + */ + + if (!intel_has_reset_engine(gt)) + return 0; + + if (igt_spinner_init(&spin, gt)) + return -ENOMEM; + + for_each_engine(engine, gt, id) { + struct intel_context *ce; + unsigned long heartbeat; + struct i915_request *rq; + + ce = intel_context_create(engine); + if (IS_ERR(ce)) { + err = PTR_ERR(ce); + break; + } + + engine_heartbeat_disable(engine, &heartbeat); + + rq = igt_spinner_create_request(&spin, ce, MI_ARB_CHECK); + if (IS_ERR(rq)) { + err = PTR_ERR(rq); + goto out; + } + i915_request_add(rq); + + if (!igt_wait_for_spinner(&spin, rq)) { + intel_gt_set_wedged(gt); + err = -ETIME; + goto out; + } + + /* We have our request executing, now remove it and reset */ + + if (test_and_set_bit(I915_RESET_ENGINE + id, + >->reset.flags)) { + intel_gt_set_wedged(gt); + err = -EBUSY; + goto out; + } + tasklet_disable(&engine->execlists.tasklet); + + engine->execlists.tasklet.func(engine->execlists.tasklet.data); + GEM_BUG_ON(execlists_active(&engine->execlists) != rq); + + i915_request_get(rq); + execlists_hold(engine, rq); + GEM_BUG_ON(!i915_request_on_hold(rq)); + + intel_engine_reset(engine, NULL); + GEM_BUG_ON(rq->fence.error != -EIO); + + tasklet_enable(&engine->execlists.tasklet); + clear_and_wake_up_bit(I915_RESET_ENGINE + id, + >->reset.flags); + + /* Check that we do not resubmit the held request */ + if (!i915_request_wait(rq, 0, HZ / 5)) { + pr_err("%s: on hold request completed!\n", + engine->name); + i915_request_put(rq); + err = -EIO; + goto out; + } + GEM_BUG_ON(!i915_request_on_hold(rq)); + + /* But is resubmitted on release */ + execlists_unhold(engine, rq); + if (i915_request_wait(rq, 0, HZ / 5) < 0) { + pr_err("%s: held request did not complete!\n", + engine->name); + intel_gt_set_wedged(gt); + err = -ETIME; + } + i915_request_put(rq); + +out: + engine_heartbeat_enable(engine, heartbeat); + intel_context_put(ce); + if (err) + break; + } + + igt_spinner_fini(&spin); + return err; +} + static int emit_semaphore_chain(struct i915_request *rq, struct i915_vma *vma, int idx) { @@ -3309,12 +3410,168 @@ static int live_virtual_bond(void *arg) return 0; } +static int reset_virtual_engine(struct intel_gt *gt, + struct intel_engine_cs **siblings, + unsigned int nsibling) +{ + struct intel_engine_cs *engine; + struct intel_context *ve; + unsigned long *heartbeat; + struct igt_spinner spin; + struct i915_request *rq; + unsigned int n; + int err = 0; + + /* + * In order to support offline error capture for fast preempt reset, + * we need to decouple the guilty request and ensure that it and its + * descendents are not executed while the capture is in progress. + */ + + heartbeat = kmalloc_array(nsibling, sizeof(*heartbeat), GFP_KERNEL); + if (!heartbeat) + return -ENOMEM; + + if (igt_spinner_init(&spin, gt)) { + err = -ENOMEM; + goto out_free; + } + + ve = intel_execlists_create_virtual(siblings, nsibling); + if (IS_ERR(ve)) { + err = PTR_ERR(ve); + goto out_spin; + } + + for (n = 0; n < nsibling; n++) + engine_heartbeat_disable(siblings[n], &heartbeat[n]); + + rq = igt_spinner_create_request(&spin, ve, MI_ARB_CHECK); + if (IS_ERR(rq)) { + err = PTR_ERR(rq); + goto out_heartbeat; + } + i915_request_add(rq); + + if (!igt_wait_for_spinner(&spin, rq)) { + intel_gt_set_wedged(gt); + err = -ETIME; + goto out_heartbeat; + } + + engine = rq->engine; + GEM_BUG_ON(engine == ve->engine); + + /* Take ownership of the reset and tasklet */ + if (test_and_set_bit(I915_RESET_ENGINE + engine->id, + >->reset.flags)) { + intel_gt_set_wedged(gt); + err = -EBUSY; + goto out_heartbeat; + } + tasklet_disable(&engine->execlists.tasklet); + + engine->execlists.tasklet.func(engine->execlists.tasklet.data); + GEM_BUG_ON(execlists_active(&engine->execlists) != rq); + + /* Fake a preemption event; failed of course */ + spin_lock_irq(&engine->active.lock); + __unwind_incomplete_requests(engine); + spin_unlock_irq(&engine->active.lock); + GEM_BUG_ON(rq->engine != ve->engine); + + /* Reset the engine while keeping our active request on hold */ + execlists_hold(engine, rq); + GEM_BUG_ON(!i915_request_on_hold(rq)); + + intel_engine_reset(engine, NULL); + GEM_BUG_ON(rq->fence.error != -EIO); + + /* Release our grasp on the engine, letting CS flow again */ + tasklet_enable(&engine->execlists.tasklet); + clear_and_wake_up_bit(I915_RESET_ENGINE + engine->id, >->reset.flags); + + /* Check that we do not resubmit the held request */ + i915_request_get(rq); + if (!i915_request_wait(rq, 0, HZ / 5)) { + pr_err("%s: on hold request completed!\n", + engine->name); + intel_gt_set_wedged(gt); + err = -EIO; + goto out_rq; + } + GEM_BUG_ON(!i915_request_on_hold(rq)); + + /* But is resubmitted on release */ + execlists_unhold(engine, rq); + if (i915_request_wait(rq, 0, HZ / 5) < 0) { + pr_err("%s: held request did not complete!\n", + engine->name); + intel_gt_set_wedged(gt); + err = -ETIME; + } + +out_rq: + i915_request_put(rq); +out_heartbeat: + for (n = 0; n < nsibling; n++) + engine_heartbeat_enable(siblings[n], heartbeat[n]); + + intel_context_put(ve); +out_spin: + igt_spinner_fini(&spin); +out_free: + kfree(heartbeat); + return err; +} + +static int live_virtual_reset(void *arg) +{ + struct intel_gt *gt = arg; + struct intel_engine_cs *siblings[MAX_ENGINE_INSTANCE + 1]; + unsigned int class, inst; + + /* + * Check that we handle a reset event within a virtual engine. + * Only the physical engine is reset, but we have to check the flow + * of the virtual requests around the reset, and make sure it is not + * forgotten. + */ + + if (USES_GUC_SUBMISSION(gt->i915)) + return 0; + + if (!intel_has_reset_engine(gt)) + return 0; + + for (class = 0; class <= MAX_ENGINE_CLASS; class++) { + int nsibling, err; + + nsibling = 0; + for (inst = 0; inst <= MAX_ENGINE_INSTANCE; inst++) { + if (!gt->engine_class[class][inst]) + continue; + + siblings[nsibling++] = gt->engine_class[class][inst]; + } + if (nsibling < 2) + continue; + + err = reset_virtual_engine(gt, siblings, nsibling); + if (err) + return err; + } + + return 0; +} + int intel_execlists_live_selftests(struct drm_i915_private *i915) { static const struct i915_subtest tests[] = { SUBTEST(live_sanitycheck), SUBTEST(live_unlite_switch), SUBTEST(live_unlite_preempt), + SUBTEST(live_hold_reset), SUBTEST(live_timeslice_preempt), SUBTEST(live_timeslice_queue), SUBTEST(live_busywait_preempt), @@ -3333,6 +3590,7 @@ int intel_execlists_live_selftests(struct drm_i915_private *i915) SUBTEST(live_virtual_mask), SUBTEST(live_virtual_preserved), SUBTEST(live_virtual_bond), + SUBTEST(live_virtual_reset), }; if (!HAS_EXECLISTS(i915)) diff --git a/drivers/gpu/drm/i915/gvt/firmware.c b/drivers/gpu/drm/i915/gvt/firmware.c index 049775e8e350..b0c1fda32977 100644 --- a/drivers/gpu/drm/i915/gvt/firmware.c +++ b/drivers/gpu/drm/i915/gvt/firmware.c @@ -146,7 +146,7 @@ void intel_gvt_free_firmware(struct intel_gvt *gvt) clean_firmware_sysfs(gvt); kfree(gvt->firmware.cfg_space); - kfree(gvt->firmware.mmio); + vfree(gvt->firmware.mmio); } static int verify_firmware(struct intel_gvt *gvt, @@ -229,7 +229,7 @@ int intel_gvt_load_firmware(struct intel_gvt *gvt) firmware->cfg_space = mem; - mem = kmalloc(info->mmio_size, GFP_KERNEL); + mem = vmalloc(info->mmio_size); if (!mem) { kfree(path); kfree(firmware->cfg_space); diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c index 34cb404ba4b7..4a4828074cb7 100644 --- a/drivers/gpu/drm/i915/gvt/gtt.c +++ b/drivers/gpu/drm/i915/gvt/gtt.c @@ -1956,7 +1956,11 @@ void _intel_vgpu_mm_release(struct kref *mm_ref) if (mm->type == INTEL_GVT_MM_PPGTT) { list_del(&mm->ppgtt_mm.list); + + mutex_lock(&mm->vgpu->gvt->gtt.ppgtt_mm_lock); list_del(&mm->ppgtt_mm.lru_list); + mutex_unlock(&mm->vgpu->gvt->gtt.ppgtt_mm_lock); + invalidate_ppgtt_mm(mm); } else { vfree(mm->ggtt_mm.virtual_ggtt); diff --git a/drivers/gpu/drm/i915/i915_active.c b/drivers/gpu/drm/i915/i915_active.c index f3da5c06f331..b0a499753526 100644 --- a/drivers/gpu/drm/i915/i915_active.c +++ b/drivers/gpu/drm/i915/i915_active.c @@ -416,13 +416,15 @@ int i915_active_acquire(struct i915_active *ref) if (err) return err; - if (!atomic_read(&ref->count) && ref->active) - err = ref->active(ref); - if (!err) { - spin_lock_irq(&ref->tree_lock); /* vs __active_retire() */ - debug_active_activate(ref); - atomic_inc(&ref->count); - spin_unlock_irq(&ref->tree_lock); + if (likely(!i915_active_acquire_if_busy(ref))) { + if (ref->active) + err = ref->active(ref); + if (!err) { + spin_lock_irq(&ref->tree_lock); /* __active_retire() */ + debug_active_activate(ref); + atomic_inc(&ref->count); + spin_unlock_irq(&ref->tree_lock); + } } mutex_unlock(&ref->mutex); @@ -605,7 +607,7 @@ int i915_active_acquire_preallocate_barrier(struct i915_active *ref, struct intel_engine_cs *engine) { intel_engine_mask_t tmp, mask = engine->mask; - struct llist_node *pos = NULL, *next; + struct llist_node *first = NULL, *last = NULL; struct intel_gt *gt = engine->gt; int err; @@ -623,6 +625,7 @@ int i915_active_acquire_preallocate_barrier(struct i915_active *ref, */ for_each_engine_masked(engine, gt, mask, tmp) { u64 idx = engine->kernel_context->timeline->fence_context; + struct llist_node *prev = first; struct active_node *node; node = reuse_idle_barrier(ref, idx); @@ -656,23 +659,23 @@ int i915_active_acquire_preallocate_barrier(struct i915_active *ref, GEM_BUG_ON(rcu_access_pointer(node->base.fence) != ERR_PTR(-EAGAIN)); GEM_BUG_ON(barrier_to_engine(node) != engine); - next = barrier_to_ll(node); - next->next = pos; - if (!pos) - pos = next; + first = barrier_to_ll(node); + first->next = prev; + if (!last) + last = first; intel_engine_pm_get(engine); } GEM_BUG_ON(!llist_empty(&ref->preallocated_barriers)); - llist_add_batch(next, pos, &ref->preallocated_barriers); + llist_add_batch(first, last, &ref->preallocated_barriers); return 0; unwind: - while (pos) { - struct active_node *node = barrier_from_ll(pos); + while (first) { + struct active_node *node = barrier_from_ll(first); - pos = pos->next; + first = first->next; atomic_dec(&ref->count); intel_engine_pm_put(barrier_to_engine(node)); diff --git a/drivers/gpu/drm/i915/i915_active.h b/drivers/gpu/drm/i915/i915_active.h index b571f675c795..51e1e854ca55 100644 --- a/drivers/gpu/drm/i915/i915_active.h +++ b/drivers/gpu/drm/i915/i915_active.h @@ -188,6 +188,12 @@ int i915_active_acquire(struct i915_active *ref); bool i915_active_acquire_if_busy(struct i915_active *ref); void i915_active_release(struct i915_active *ref); +static inline void __i915_active_acquire(struct i915_active *ref) +{ + GEM_BUG_ON(!atomic_read(&ref->count)); + atomic_inc(&ref->count); +} + static inline bool i915_active_is_idle(const struct i915_active *ref) { diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 94f993e4c12f..c2de2f45b459 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -265,7 +265,10 @@ i915_gem_dumb_create(struct drm_file *file, DRM_FORMAT_MOD_LINEAR)) args->pitch = ALIGN(args->pitch, 4096); - args->size = args->pitch * args->height; + if (args->pitch < args->width) + return -EINVAL; + + args->size = mul_u32_u32(args->pitch, args->height); mem_type = INTEL_MEMORY_SYSTEM; if (HAS_LMEM(to_i915(dev))) diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c index 4c1836f0a991..594341e27a47 100644 --- a/drivers/gpu/drm/i915/i915_gpu_error.c +++ b/drivers/gpu/drm/i915/i915_gpu_error.c @@ -1681,7 +1681,7 @@ static const char *error_msg(struct i915_gpu_coredump *error) "GPU HANG: ecode %d:%x:%08x", INTEL_GEN(error->i915), engines, generate_ecode(first)); - if (first) { + if (first && first->context.pid) { /* Just show the first executing process, more is confusing */ len += scnprintf(error->error_msg + len, sizeof(error->error_msg) - len, diff --git a/drivers/gpu/drm/i915/i915_gpu_error.h b/drivers/gpu/drm/i915/i915_gpu_error.h index 9109004956bd..e4a6afed3bbf 100644 --- a/drivers/gpu/drm/i915/i915_gpu_error.h +++ b/drivers/gpu/drm/i915/i915_gpu_error.h @@ -314,8 +314,11 @@ i915_vma_capture_finish(struct intel_gt_coredump *gt, } static inline void -i915_error_state_store(struct drm_i915_private *i915, - struct i915_gpu_coredump *error) +i915_error_state_store(struct i915_gpu_coredump *error) +{ +} + +static inline void i915_gpu_coredump_put(struct i915_gpu_coredump *gpu) { } diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c index 28a82c849bac..ec0299490dd4 100644 --- a/drivers/gpu/drm/i915/i915_pmu.c +++ b/drivers/gpu/drm/i915/i915_pmu.c @@ -637,8 +637,10 @@ static void i915_pmu_enable(struct perf_event *event) container_of(event->pmu, typeof(*i915), pmu.base); unsigned int bit = event_enabled_bit(event); struct i915_pmu *pmu = &i915->pmu; + intel_wakeref_t wakeref; unsigned long flags; + wakeref = intel_runtime_pm_get(&i915->runtime_pm); spin_lock_irqsave(&pmu->lock, flags); /* @@ -648,6 +650,14 @@ static void i915_pmu_enable(struct perf_event *event) BUILD_BUG_ON(ARRAY_SIZE(pmu->enable_count) != I915_PMU_MASK_BITS); GEM_BUG_ON(bit >= ARRAY_SIZE(pmu->enable_count)); GEM_BUG_ON(pmu->enable_count[bit] == ~0); + + if (pmu->enable_count[bit] == 0 && + config_enabled_mask(I915_PMU_RC6_RESIDENCY) & BIT_ULL(bit)) { + pmu->sample[__I915_SAMPLE_RC6_LAST_REPORTED].cur = 0; + pmu->sample[__I915_SAMPLE_RC6].cur = __get_rc6(&i915->gt); + pmu->sleep_last = ktime_get(); + } + pmu->enable |= BIT_ULL(bit); pmu->enable_count[bit]++; @@ -688,6 +698,8 @@ static void i915_pmu_enable(struct perf_event *event) * an existing non-zero value. */ local64_set(&event->hw.prev_count, __i915_pmu_event_read(event)); + + intel_runtime_pm_put(&i915->runtime_pm, wakeref); } static void i915_pmu_disable(struct perf_event *event) diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c index be185886e4fc..78a5f5d3c070 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -221,6 +221,8 @@ static void remove_from_engine(struct i915_request *rq) locked = engine; } list_del_init(&rq->sched.link); + clear_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags); + clear_bit(I915_FENCE_FLAG_HOLD, &rq->fence.flags); spin_unlock_irq(&locked->active.lock); } @@ -408,8 +410,10 @@ bool __i915_request_submit(struct i915_request *request) xfer: /* We may be recursing from the signal callback of another i915 fence */ spin_lock_nested(&request->lock, SINGLE_DEPTH_NESTING); - if (!test_and_set_bit(I915_FENCE_FLAG_ACTIVE, &request->fence.flags)) + if (!test_and_set_bit(I915_FENCE_FLAG_ACTIVE, &request->fence.flags)) { list_move_tail(&request->sched.link, &engine->active.requests); + clear_bit(I915_FENCE_FLAG_PQUEUE, &request->fence.flags); + } if (test_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, &request->fence.flags) && !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &request->fence.flags) && diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h index 031433691a06..f57eadcf3583 100644 --- a/drivers/gpu/drm/i915/i915_request.h +++ b/drivers/gpu/drm/i915/i915_request.h @@ -71,6 +71,18 @@ enum { I915_FENCE_FLAG_ACTIVE = DMA_FENCE_FLAG_USER_BITS, /* + * I915_FENCE_FLAG_PQUEUE - this request is ready for execution + * + * Using the scheduler, when a request is ready for execution it is put + * into the priority queue, and removed from that queue when transferred + * to the HW runlists. We want to track its membership within the + * priority queue so that we can easily check before rescheduling. + * + * See i915_request_in_priority_queue() + */ + I915_FENCE_FLAG_PQUEUE, + + /* * I915_FENCE_FLAG_SIGNAL - this request is currently on signal_list * * Internal bookkeeping used by the breadcrumb code to track when @@ -79,6 +91,13 @@ enum { I915_FENCE_FLAG_SIGNAL, /* + * I915_FENCE_FLAG_HOLD - this request is currently on hold + * + * This request has been suspended, pending an ongoing investigation. + */ + I915_FENCE_FLAG_HOLD, + + /* * I915_FENCE_FLAG_NOPREEMPT - this request should not be preempted * * The execution of some requests should not be interrupted. This is @@ -361,6 +380,11 @@ static inline bool i915_request_is_active(const struct i915_request *rq) return test_bit(I915_FENCE_FLAG_ACTIVE, &rq->fence.flags); } +static inline bool i915_request_in_priority_queue(const struct i915_request *rq) +{ + return test_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags); +} + /** * Returns true if seq1 is later than seq2. */ @@ -454,6 +478,27 @@ static inline bool i915_request_is_running(const struct i915_request *rq) return __i915_request_has_started(rq); } +/** + * i915_request_is_running - check if the request is ready for execution + * @rq: the request + * + * Upon construction, the request is instructed to wait upon various + * signals before it is ready to be executed by the HW. That is, we do + * not want to start execution and read data before it is written. In practice, + * this is controlled with a mixture of interrupts and semaphores. Once + * the submit fence is completed, the backend scheduler will place the + * request into its queue and from there submit it for execution. So we + * can detect when a request is eligible for execution (and is under control + * of the scheduler) by querying where it is in any of the scheduler's lists. + * + * Returns true if the request is ready for execution (it may be inflight), + * false otherwise. + */ +static inline bool i915_request_is_ready(const struct i915_request *rq) +{ + return !list_empty(&rq->sched.link); +} + static inline bool i915_request_completed(const struct i915_request *rq) { if (i915_request_signaled(rq)) @@ -483,6 +528,21 @@ static inline bool i915_request_has_sentinel(const struct i915_request *rq) return unlikely(test_bit(I915_FENCE_FLAG_SENTINEL, &rq->fence.flags)); } +static inline bool i915_request_on_hold(const struct i915_request *rq) +{ + return unlikely(test_bit(I915_FENCE_FLAG_HOLD, &rq->fence.flags)); +} + +static inline void i915_request_set_hold(struct i915_request *rq) +{ + set_bit(I915_FENCE_FLAG_HOLD, &rq->fence.flags); +} + +static inline void i915_request_clear_hold(struct i915_request *rq) +{ + clear_bit(I915_FENCE_FLAG_HOLD, &rq->fence.flags); +} + static inline struct intel_timeline * i915_request_timeline(struct i915_request *rq) { diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c index bf87c70bfdd9..5d96cfba40f8 100644 --- a/drivers/gpu/drm/i915/i915_scheduler.c +++ b/drivers/gpu/drm/i915/i915_scheduler.c @@ -326,20 +326,18 @@ static void __i915_schedule(struct i915_sched_node *node, node->attr.priority = prio; - if (list_empty(&node->link)) { - /* - * If the request is not in the priolist queue because - * it is not yet runnable, then it doesn't contribute - * to our preemption decisions. On the other hand, - * if the request is on the HW, it too is not in the - * queue; but in that case we may still need to reorder - * the inflight requests. - */ + /* + * Once the request is ready, it will be placed into the + * priority lists and then onto the HW runlist. Before the + * request is ready, it does not contribute to our preemption + * decisions and we can safely ignore it, as it will, and + * any preemption required, be dealt with upon submission. + * See engine->submit_request() + */ + if (list_empty(&node->link)) continue; - } - if (!intel_engine_is_virtual(engine) && - !i915_request_is_active(node_to_request(node))) { + if (i915_request_in_priority_queue(node_to_request(node))) { if (!cache.priolist) cache.priolist = i915_sched_lookup_priolist(engine, diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c index 17d7c525ea5c..4ff380770b32 100644 --- a/drivers/gpu/drm/i915/i915_vma.c +++ b/drivers/gpu/drm/i915/i915_vma.c @@ -1202,16 +1202,26 @@ int __i915_vma_unbind(struct i915_vma *vma) if (ret) return ret; - GEM_BUG_ON(i915_vma_is_active(vma)); if (i915_vma_is_pinned(vma)) { vma_print_allocator(vma, "is pinned"); return -EAGAIN; } - GEM_BUG_ON(i915_vma_is_active(vma)); + /* + * After confirming that no one else is pinning this vma, wait for + * any laggards who may have crept in during the wait (through + * a residual pin skipping the vm->mutex) to complete. + */ + ret = i915_vma_sync(vma); + if (ret) + return ret; + if (!drm_mm_node_allocated(&vma->node)) return 0; + GEM_BUG_ON(i915_vma_is_pinned(vma)); + GEM_BUG_ON(i915_vma_is_active(vma)); + if (i915_vma_is_map_and_fenceable(vma)) { /* * Check that we have flushed all writes through the GGTT diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index c26219c7a49f..e4b750b0c2d3 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -441,6 +441,14 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv) if (ret) goto err_msm_uninit; + if (!dev->dma_parms) { + dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms), + GFP_KERNEL); + if (!dev->dma_parms) + return -ENOMEM; + } + dma_set_max_seg_size(dev, DMA_BIT_MASK(32)); + msm_gem_shrinker_init(ddev); switch (get_mdp_ver(pdev)) { diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c index 6da59f476aba..b7a618db3ee2 100644 --- a/drivers/gpu/drm/panfrost/panfrost_drv.c +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c @@ -166,6 +166,7 @@ panfrost_lookup_bos(struct drm_device *dev, break; } + atomic_inc(&bo->gpu_usecount); job->mappings[i] = mapping; } diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.h b/drivers/gpu/drm/panfrost/panfrost_gem.h index ca1bc9019600..b3517ff9630c 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem.h +++ b/drivers/gpu/drm/panfrost/panfrost_gem.h @@ -30,6 +30,12 @@ struct panfrost_gem_object { struct mutex lock; } mappings; + /* + * Count the number of jobs referencing this BO so we don't let the + * shrinker reclaim this object prematurely. + */ + atomic_t gpu_usecount; + bool noexec :1; bool is_heap :1; }; diff --git a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c index f5dd7b29bc95..288e46c40673 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c +++ b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c @@ -41,6 +41,9 @@ static bool panfrost_gem_purge(struct drm_gem_object *obj) struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); struct panfrost_gem_object *bo = to_panfrost_bo(obj); + if (atomic_read(&bo->gpu_usecount)) + return false; + if (!mutex_trylock(&shmem->pages_lock)) return false; diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c index 7c36ec675b73..7157dfd7dea3 100644 --- a/drivers/gpu/drm/panfrost/panfrost_job.c +++ b/drivers/gpu/drm/panfrost/panfrost_job.c @@ -269,8 +269,13 @@ static void panfrost_job_cleanup(struct kref *ref) dma_fence_put(job->render_done_fence); if (job->mappings) { - for (i = 0; i < job->bo_count; i++) + for (i = 0; i < job->bo_count; i++) { + if (!job->mappings[i]) + break; + + atomic_dec(&job->mappings[i]->obj->gpu_usecount); panfrost_gem_mapping_put(job->mappings[i]); + } kvfree(job->mappings); } diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c index 5ae67d526b1d..328272ff77d8 100644 --- a/drivers/gpu/drm/sun4i/sun4i_drv.c +++ b/drivers/gpu/drm/sun4i/sun4i_drv.c @@ -85,7 +85,6 @@ static int sun4i_drv_bind(struct device *dev) } drm_mode_config_init(drm); - drm->mode_config.allow_fb_modifiers = true; ret = component_bind_all(drm->dev, drm); if (ret) { diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c index 5bd60ded3d81..909eba43664a 100644 --- a/drivers/gpu/drm/vgem/vgem_drv.c +++ b/drivers/gpu/drm/vgem/vgem_drv.c @@ -196,9 +196,10 @@ static struct drm_gem_object *vgem_gem_create(struct drm_device *dev, return ERR_CAST(obj); ret = drm_gem_handle_create(file, &obj->base, handle); - drm_gem_object_put_unlocked(&obj->base); - if (ret) + if (ret) { + drm_gem_object_put_unlocked(&obj->base); return ERR_PTR(ret); + } return &obj->base; } @@ -221,7 +222,9 @@ static int vgem_gem_dumb_create(struct drm_file *file, struct drm_device *dev, args->size = gem_object->size; args->pitch = pitch; - DRM_DEBUG("Created object of size %lld\n", size); + drm_gem_object_put_unlocked(gem_object); + + DRM_DEBUG("Created object of size %llu\n", args->size); return 0; } diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c index f01f4887fb2e..a91ed01abb68 100644 --- a/drivers/hwmon/pmbus/ltc2978.c +++ b/drivers/hwmon/pmbus/ltc2978.c @@ -82,8 +82,8 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882, #define LTC_POLL_TIMEOUT 100 /* in milli-seconds */ -#define LTC_NOT_BUSY BIT(5) -#define LTC_NOT_PENDING BIT(4) +#define LTC_NOT_BUSY BIT(6) +#define LTC_NOT_PENDING BIT(5) /* * LTC2978 clears peak data whenever the CLEAR_FAULTS command is executed, which diff --git a/drivers/hwmon/pmbus/xdpe12284.c b/drivers/hwmon/pmbus/xdpe12284.c index 3d47806ff4d3..ecd9b65627ec 100644 --- a/drivers/hwmon/pmbus/xdpe12284.c +++ b/drivers/hwmon/pmbus/xdpe12284.c @@ -94,8 +94,8 @@ static const struct i2c_device_id xdpe122_id[] = { MODULE_DEVICE_TABLE(i2c, xdpe122_id); static const struct of_device_id __maybe_unused xdpe122_of_match[] = { - {.compatible = "infineon, xdpe12254"}, - {.compatible = "infineon, xdpe12284"}, + {.compatible = "infineon,xdpe12254"}, + {.compatible = "infineon,xdpe12284"}, {} }; MODULE_DEVICE_TABLE(of, xdpe122_of_match); diff --git a/drivers/infiniband/core/security.c b/drivers/infiniband/core/security.c index 6eb6d2717ca5..2b4d80393bd0 100644 --- a/drivers/infiniband/core/security.c +++ b/drivers/infiniband/core/security.c @@ -339,22 +339,16 @@ static struct ib_ports_pkeys *get_new_pps(const struct ib_qp *qp, if (!new_pps) return NULL; - if (qp_attr_mask & (IB_QP_PKEY_INDEX | IB_QP_PORT)) { - if (!qp_pps) { - new_pps->main.port_num = qp_attr->port_num; - new_pps->main.pkey_index = qp_attr->pkey_index; - } else { - new_pps->main.port_num = (qp_attr_mask & IB_QP_PORT) ? - qp_attr->port_num : - qp_pps->main.port_num; - - new_pps->main.pkey_index = - (qp_attr_mask & IB_QP_PKEY_INDEX) ? - qp_attr->pkey_index : - qp_pps->main.pkey_index; - } + if (qp_attr_mask & IB_QP_PORT) + new_pps->main.port_num = + (qp_pps) ? qp_pps->main.port_num : qp_attr->port_num; + if (qp_attr_mask & IB_QP_PKEY_INDEX) + new_pps->main.pkey_index = (qp_pps) ? qp_pps->main.pkey_index : + qp_attr->pkey_index; + if ((qp_attr_mask & IB_QP_PKEY_INDEX) && (qp_attr_mask & IB_QP_PORT)) new_pps->main.state = IB_PORT_PKEY_VALID; - } else if (qp_pps) { + + if (!(qp_attr_mask & (IB_QP_PKEY_INDEX || IB_QP_PORT)) && qp_pps) { new_pps->main.port_num = qp_pps->main.port_num; new_pps->main.pkey_index = qp_pps->main.pkey_index; if (qp_pps->main.state != IB_PORT_PKEY_NOT_VALID) diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c index d1407fa378e8..1235ffb2389b 100644 --- a/drivers/infiniband/core/user_mad.c +++ b/drivers/infiniband/core/user_mad.c @@ -1312,6 +1312,9 @@ static void ib_umad_kill_port(struct ib_umad_port *port) struct ib_umad_file *file; int id; + cdev_device_del(&port->sm_cdev, &port->sm_dev); + cdev_device_del(&port->cdev, &port->dev); + mutex_lock(&port->file_mutex); /* Mark ib_dev NULL and block ioctl or other file ops to progress @@ -1331,8 +1334,6 @@ static void ib_umad_kill_port(struct ib_umad_port *port) mutex_unlock(&port->file_mutex); - cdev_device_del(&port->sm_cdev, &port->sm_dev); - cdev_device_del(&port->cdev, &port->dev); ida_free(&umad_ida, port->dev_num); /* balances device_initialize() */ diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index c8693f5231dd..025933752e1d 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -2745,12 +2745,6 @@ static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs, return 0; } -static size_t kern_spec_filter_sz(const struct ib_uverbs_flow_spec_hdr *spec) -{ - /* Returns user space filter size, includes padding */ - return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2; -} - static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size, u16 ib_real_filter_sz) { @@ -2894,11 +2888,16 @@ int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type, static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec, union ib_flow_spec *ib_spec) { - ssize_t kern_filter_sz; + size_t kern_filter_sz; void *kern_spec_mask; void *kern_spec_val; - kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr); + if (check_sub_overflow((size_t)kern_spec->hdr.size, + sizeof(struct ib_uverbs_flow_spec_hdr), + &kern_filter_sz)) + return -EINVAL; + + kern_filter_sz /= 2; kern_spec_val = (void *)kern_spec + sizeof(struct ib_uverbs_flow_spec_hdr); diff --git a/drivers/infiniband/core/uverbs_std_types.c b/drivers/infiniband/core/uverbs_std_types.c index 994d8744b246..3abfc63225cb 100644 --- a/drivers/infiniband/core/uverbs_std_types.c +++ b/drivers/infiniband/core/uverbs_std_types.c @@ -220,6 +220,7 @@ void ib_uverbs_free_event_queue(struct ib_uverbs_event_queue *event_queue) list_for_each_entry_safe(entry, tmp, &event_queue->event_list, list) { if (entry->counter) list_del(&entry->obj_list); + list_del(&entry->list); kfree(entry); } spin_unlock_irq(&event_queue->lock); diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c index ee1182f9b627..d69dece3b1d5 100644 --- a/drivers/infiniband/hw/cxgb4/cm.c +++ b/drivers/infiniband/hw/cxgb4/cm.c @@ -3036,6 +3036,10 @@ static int terminate(struct c4iw_dev *dev, struct sk_buff *skb) C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); } + /* As per draft-hilland-iwarp-verbs-v1.0, sec 6.2.3, + * when entering the TERM state the RNIC MUST initiate a CLOSE. + */ + c4iw_ep_disconnect(ep, 1, GFP_KERNEL); c4iw_put_ep(&ep->com); } else pr_warn("TERM received tid %u no ep/qp\n", tid); diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c index bbcac539777a..89ac2f9ae6dd 100644 --- a/drivers/infiniband/hw/cxgb4/qp.c +++ b/drivers/infiniband/hw/cxgb4/qp.c @@ -1948,10 +1948,10 @@ int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp, qhp->attr.layer_etype = attrs->layer_etype; qhp->attr.ecode = attrs->ecode; ep = qhp->ep; - c4iw_get_ep(&ep->com); - disconnect = 1; if (!internal) { + c4iw_get_ep(&ep->com); terminate = 1; + disconnect = 1; } else { terminate = qhp->attr.send_term; ret = rdma_fini(rhp, qhp, ep); diff --git a/drivers/infiniband/hw/hfi1/affinity.c b/drivers/infiniband/hw/hfi1/affinity.c index c142b23bb401..1aeea5d65c01 100644 --- a/drivers/infiniband/hw/hfi1/affinity.c +++ b/drivers/infiniband/hw/hfi1/affinity.c @@ -479,6 +479,8 @@ static int _dev_comp_vect_mappings_create(struct hfi1_devdata *dd, rvt_get_ibdev_name(&(dd)->verbs_dev.rdi), i, cpu); } + free_cpumask_var(available_cpus); + free_cpumask_var(non_intr_cpus); return 0; fail: diff --git a/drivers/infiniband/hw/hfi1/file_ops.c b/drivers/infiniband/hw/hfi1/file_ops.c index bef6946861b2..259115886d35 100644 --- a/drivers/infiniband/hw/hfi1/file_ops.c +++ b/drivers/infiniband/hw/hfi1/file_ops.c @@ -200,23 +200,24 @@ static int hfi1_file_open(struct inode *inode, struct file *fp) fd = kzalloc(sizeof(*fd), GFP_KERNEL); - if (fd) { - fd->rec_cpu_num = -1; /* no cpu affinity by default */ - fd->mm = current->mm; - mmgrab(fd->mm); - fd->dd = dd; - kobject_get(&fd->dd->kobj); - fp->private_data = fd; - } else { - fp->private_data = NULL; - - if (atomic_dec_and_test(&dd->user_refcount)) - complete(&dd->user_comp); - - return -ENOMEM; - } - + if (!fd || init_srcu_struct(&fd->pq_srcu)) + goto nomem; + spin_lock_init(&fd->pq_rcu_lock); + spin_lock_init(&fd->tid_lock); + spin_lock_init(&fd->invalid_lock); + fd->rec_cpu_num = -1; /* no cpu affinity by default */ + fd->mm = current->mm; + mmgrab(fd->mm); + fd->dd = dd; + kobject_get(&fd->dd->kobj); + fp->private_data = fd; return 0; +nomem: + kfree(fd); + fp->private_data = NULL; + if (atomic_dec_and_test(&dd->user_refcount)) + complete(&dd->user_comp); + return -ENOMEM; } static long hfi1_file_ioctl(struct file *fp, unsigned int cmd, @@ -301,21 +302,30 @@ static long hfi1_file_ioctl(struct file *fp, unsigned int cmd, static ssize_t hfi1_write_iter(struct kiocb *kiocb, struct iov_iter *from) { struct hfi1_filedata *fd = kiocb->ki_filp->private_data; - struct hfi1_user_sdma_pkt_q *pq = fd->pq; + struct hfi1_user_sdma_pkt_q *pq; struct hfi1_user_sdma_comp_q *cq = fd->cq; int done = 0, reqs = 0; unsigned long dim = from->nr_segs; + int idx; - if (!cq || !pq) + idx = srcu_read_lock(&fd->pq_srcu); + pq = srcu_dereference(fd->pq, &fd->pq_srcu); + if (!cq || !pq) { + srcu_read_unlock(&fd->pq_srcu, idx); return -EIO; + } - if (!iter_is_iovec(from) || !dim) + if (!iter_is_iovec(from) || !dim) { + srcu_read_unlock(&fd->pq_srcu, idx); return -EINVAL; + } trace_hfi1_sdma_request(fd->dd, fd->uctxt->ctxt, fd->subctxt, dim); - if (atomic_read(&pq->n_reqs) == pq->n_max_reqs) + if (atomic_read(&pq->n_reqs) == pq->n_max_reqs) { + srcu_read_unlock(&fd->pq_srcu, idx); return -ENOSPC; + } while (dim) { int ret; @@ -333,6 +343,7 @@ static ssize_t hfi1_write_iter(struct kiocb *kiocb, struct iov_iter *from) reqs++; } + srcu_read_unlock(&fd->pq_srcu, idx); return reqs; } @@ -707,6 +718,7 @@ done: if (atomic_dec_and_test(&dd->user_refcount)) complete(&dd->user_comp); + cleanup_srcu_struct(&fdata->pq_srcu); kfree(fdata); return 0; } diff --git a/drivers/infiniband/hw/hfi1/hfi.h b/drivers/infiniband/hw/hfi1/hfi.h index 6365e8ffed9d..cae12f416ca0 100644 --- a/drivers/infiniband/hw/hfi1/hfi.h +++ b/drivers/infiniband/hw/hfi1/hfi.h @@ -1444,10 +1444,13 @@ struct mmu_rb_handler; /* Private data for file operations */ struct hfi1_filedata { + struct srcu_struct pq_srcu; struct hfi1_devdata *dd; struct hfi1_ctxtdata *uctxt; struct hfi1_user_sdma_comp_q *cq; - struct hfi1_user_sdma_pkt_q *pq; + /* update side lock for SRCU */ + spinlock_t pq_rcu_lock; + struct hfi1_user_sdma_pkt_q __rcu *pq; u16 subctxt; /* for cpu affinity; -1 if none */ int rec_cpu_num; diff --git a/drivers/infiniband/hw/hfi1/user_exp_rcv.c b/drivers/infiniband/hw/hfi1/user_exp_rcv.c index f05742ac0949..4da03f823474 100644 --- a/drivers/infiniband/hw/hfi1/user_exp_rcv.c +++ b/drivers/infiniband/hw/hfi1/user_exp_rcv.c @@ -87,9 +87,6 @@ int hfi1_user_exp_rcv_init(struct hfi1_filedata *fd, { int ret = 0; - spin_lock_init(&fd->tid_lock); - spin_lock_init(&fd->invalid_lock); - fd->entry_to_rb = kcalloc(uctxt->expected_count, sizeof(struct rb_node *), GFP_KERNEL); @@ -142,10 +139,12 @@ void hfi1_user_exp_rcv_free(struct hfi1_filedata *fd) { struct hfi1_ctxtdata *uctxt = fd->uctxt; + mutex_lock(&uctxt->exp_mutex); if (!EXP_TID_SET_EMPTY(uctxt->tid_full_list)) unlock_exp_tids(uctxt, &uctxt->tid_full_list, fd); if (!EXP_TID_SET_EMPTY(uctxt->tid_used_list)) unlock_exp_tids(uctxt, &uctxt->tid_used_list, fd); + mutex_unlock(&uctxt->exp_mutex); kfree(fd->invalid_tids); fd->invalid_tids = NULL; diff --git a/drivers/infiniband/hw/hfi1/user_sdma.c b/drivers/infiniband/hw/hfi1/user_sdma.c index fd754a16475a..c2f0d9ba93de 100644 --- a/drivers/infiniband/hw/hfi1/user_sdma.c +++ b/drivers/infiniband/hw/hfi1/user_sdma.c @@ -179,7 +179,6 @@ int hfi1_user_sdma_alloc_queues(struct hfi1_ctxtdata *uctxt, pq = kzalloc(sizeof(*pq), GFP_KERNEL); if (!pq) return -ENOMEM; - pq->dd = dd; pq->ctxt = uctxt->ctxt; pq->subctxt = fd->subctxt; @@ -236,7 +235,7 @@ int hfi1_user_sdma_alloc_queues(struct hfi1_ctxtdata *uctxt, goto pq_mmu_fail; } - fd->pq = pq; + rcu_assign_pointer(fd->pq, pq); fd->cq = cq; return 0; @@ -264,8 +263,14 @@ int hfi1_user_sdma_free_queues(struct hfi1_filedata *fd, trace_hfi1_sdma_user_free_queues(uctxt->dd, uctxt->ctxt, fd->subctxt); - pq = fd->pq; + spin_lock(&fd->pq_rcu_lock); + pq = srcu_dereference_check(fd->pq, &fd->pq_srcu, + lockdep_is_held(&fd->pq_rcu_lock)); if (pq) { + rcu_assign_pointer(fd->pq, NULL); + spin_unlock(&fd->pq_rcu_lock); + synchronize_srcu(&fd->pq_srcu); + /* at this point there can be no more new requests */ if (pq->handler) hfi1_mmu_rb_unregister(pq->handler); iowait_sdma_drain(&pq->busy); @@ -277,7 +282,8 @@ int hfi1_user_sdma_free_queues(struct hfi1_filedata *fd, kfree(pq->req_in_use); kmem_cache_destroy(pq->txreq_cache); kfree(pq); - fd->pq = NULL; + } else { + spin_unlock(&fd->pq_rcu_lock); } if (fd->cq) { vfree(fd->cq->comps); @@ -321,7 +327,8 @@ int hfi1_user_sdma_process_request(struct hfi1_filedata *fd, { int ret = 0, i; struct hfi1_ctxtdata *uctxt = fd->uctxt; - struct hfi1_user_sdma_pkt_q *pq = fd->pq; + struct hfi1_user_sdma_pkt_q *pq = + srcu_dereference(fd->pq, &fd->pq_srcu); struct hfi1_user_sdma_comp_q *cq = fd->cq; struct hfi1_devdata *dd = pq->dd; unsigned long idx = 0; diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c index d7efc9f6daf0..46e1ab771f10 100644 --- a/drivers/infiniband/hw/mlx5/devx.c +++ b/drivers/infiniband/hw/mlx5/devx.c @@ -2319,14 +2319,12 @@ static int deliver_event(struct devx_event_subscription *event_sub, if (ev_file->omit_data) { spin_lock_irqsave(&ev_file->lock, flags); - if (!list_empty(&event_sub->event_list)) { + if (!list_empty(&event_sub->event_list) || + ev_file->is_destroyed) { spin_unlock_irqrestore(&ev_file->lock, flags); return 0; } - /* is_destroyed is ignored here because we don't have any memory - * allocation to clean up for the omit_data case - */ list_add_tail(&event_sub->event_list, &ev_file->event_list); spin_unlock_irqrestore(&ev_file->lock, flags); wake_up_interruptible(&ev_file->poll_wait); @@ -2473,11 +2471,11 @@ static ssize_t devx_async_cmd_event_read(struct file *filp, char __user *buf, return -ERESTARTSYS; } - if (list_empty(&ev_queue->event_list) && - ev_queue->is_destroyed) - return -EIO; - spin_lock_irq(&ev_queue->lock); + if (ev_queue->is_destroyed) { + spin_unlock_irq(&ev_queue->lock); + return -EIO; + } } event = list_entry(ev_queue->event_list.next, @@ -2551,10 +2549,6 @@ static ssize_t devx_async_event_read(struct file *filp, char __user *buf, return -EOVERFLOW; } - if (ev_file->is_destroyed) { - spin_unlock_irq(&ev_file->lock); - return -EIO; - } while (list_empty(&ev_file->event_list)) { spin_unlock_irq(&ev_file->lock); @@ -2667,8 +2661,10 @@ static int devx_async_cmd_event_destroy_uobj(struct ib_uobject *uobj, spin_lock_irq(&comp_ev_file->ev_queue.lock); list_for_each_entry_safe(entry, tmp, - &comp_ev_file->ev_queue.event_list, list) + &comp_ev_file->ev_queue.event_list, list) { + list_del(&entry->list); kvfree(entry); + } spin_unlock_irq(&comp_ev_file->ev_queue.lock); return 0; }; @@ -2680,11 +2676,29 @@ static int devx_async_event_destroy_uobj(struct ib_uobject *uobj, container_of(uobj, struct devx_async_event_file, uobj); struct devx_event_subscription *event_sub, *event_sub_tmp; - struct devx_async_event_data *entry, *tmp; struct mlx5_ib_dev *dev = ev_file->dev; spin_lock_irq(&ev_file->lock); ev_file->is_destroyed = 1; + + /* free the pending events allocation */ + if (ev_file->omit_data) { + struct devx_event_subscription *event_sub, *tmp; + + list_for_each_entry_safe(event_sub, tmp, &ev_file->event_list, + event_list) + list_del_init(&event_sub->event_list); + + } else { + struct devx_async_event_data *entry, *tmp; + + list_for_each_entry_safe(entry, tmp, &ev_file->event_list, + list) { + list_del(&entry->list); + kfree(entry); + } + } + spin_unlock_irq(&ev_file->lock); wake_up_interruptible(&ev_file->poll_wait); @@ -2699,15 +2713,6 @@ static int devx_async_event_destroy_uobj(struct ib_uobject *uobj, } mutex_unlock(&dev->devx_event_table.event_xa_lock); - /* free the pending events allocation */ - if (!ev_file->omit_data) { - spin_lock_irq(&ev_file->lock); - list_for_each_entry_safe(entry, tmp, - &ev_file->event_list, list) - kfree(entry); /* read can't come any more */ - spin_unlock_irq(&ev_file->lock); - } - put_device(&dev->ib_dev.dev); return 0; }; diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index e874d688d040..e4bcfa81b70a 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -2283,8 +2283,8 @@ static int mlx5_ib_mmap_offset(struct mlx5_ib_dev *dev, static u64 mlx5_entry_to_mmap_offset(struct mlx5_user_mmap_entry *entry) { - u16 cmd = entry->rdma_entry.start_pgoff >> 16; - u16 index = entry->rdma_entry.start_pgoff & 0xFFFF; + u64 cmd = (entry->rdma_entry.start_pgoff >> 16) & 0xFFFF; + u64 index = entry->rdma_entry.start_pgoff & 0xFFFF; return (((index >> 8) << 16) | (cmd << MLX5_IB_MMAP_CMD_SHIFT) | (index & 0xFF)) << PAGE_SHIFT; @@ -6545,7 +6545,7 @@ static int mlx5_ib_init_var_table(struct mlx5_ib_dev *dev) doorbell_bar_offset); bar_size = (1ULL << log_doorbell_bar_size) * 4096; var_table->stride_size = 1ULL << log_doorbell_stride; - var_table->num_var_hw_entries = bar_size / var_table->stride_size; + var_table->num_var_hw_entries = div64_u64(bar_size, var_table->stride_size); mutex_init(&var_table->bitmap_lock); var_table->bitmap = bitmap_zalloc(var_table->num_var_hw_entries, GFP_KERNEL); diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c index a4f8e7030787..957f3a52589b 100644 --- a/drivers/infiniband/hw/mlx5/qp.c +++ b/drivers/infiniband/hw/mlx5/qp.c @@ -3441,9 +3441,6 @@ static int __mlx5_ib_qp_set_counter(struct ib_qp *qp, struct mlx5_ib_qp_base *base; u32 set_id; - if (!MLX5_CAP_GEN(dev->mdev, rts2rts_qp_counters_set_id)) - return 0; - if (counter) set_id = counter->id; else @@ -6576,6 +6573,7 @@ void mlx5_ib_drain_rq(struct ib_qp *qp) */ int mlx5_ib_qp_set_counter(struct ib_qp *qp, struct rdma_counter *counter) { + struct mlx5_ib_dev *dev = to_mdev(qp->device); struct mlx5_ib_qp *mqp = to_mqp(qp); int err = 0; @@ -6585,6 +6583,11 @@ int mlx5_ib_qp_set_counter(struct ib_qp *qp, struct rdma_counter *counter) goto out; } + if (!MLX5_CAP_GEN(dev->mdev, rts2rts_qp_counters_set_id)) { + err = -EOPNOTSUPP; + goto out; + } + if (mqp->state == IB_QPS_RTS) { err = __mlx5_ib_qp_set_counter(qp, counter); if (!err) diff --git a/drivers/infiniband/sw/rdmavt/qp.c b/drivers/infiniband/sw/rdmavt/qp.c index 3cdf75d0c7a4..7858d499db03 100644 --- a/drivers/infiniband/sw/rdmavt/qp.c +++ b/drivers/infiniband/sw/rdmavt/qp.c @@ -61,6 +61,8 @@ #define RVT_RWQ_COUNT_THRESHOLD 16 static void rvt_rc_timeout(struct timer_list *t); +static void rvt_reset_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, + enum ib_qp_type type); /* * Convert the AETH RNR timeout code into the number of microseconds. @@ -452,40 +454,41 @@ no_qp_table: } /** - * free_all_qps - check for QPs still in use + * rvt_free_qp_cb - callback function to reset a qp + * @qp: the qp to reset + * @v: a 64-bit value + * + * This function resets the qp and removes it from the + * qp hash table. + */ +static void rvt_free_qp_cb(struct rvt_qp *qp, u64 v) +{ + unsigned int *qp_inuse = (unsigned int *)v; + struct rvt_dev_info *rdi = ib_to_rvt(qp->ibqp.device); + + /* Reset the qp and remove it from the qp hash list */ + rvt_reset_qp(rdi, qp, qp->ibqp.qp_type); + + /* Increment the qp_inuse count */ + (*qp_inuse)++; +} + +/** + * rvt_free_all_qps - check for QPs still in use * @rdi: rvt device info structure * * There should not be any QPs still in use. * Free memory for table. + * Return the number of QPs still in use. */ static unsigned rvt_free_all_qps(struct rvt_dev_info *rdi) { - unsigned long flags; - struct rvt_qp *qp; - unsigned n, qp_inuse = 0; - spinlock_t *ql; /* work around too long line below */ - - if (rdi->driver_f.free_all_qps) - qp_inuse = rdi->driver_f.free_all_qps(rdi); + unsigned int qp_inuse = 0; qp_inuse += rvt_mcast_tree_empty(rdi); - if (!rdi->qp_dev) - return qp_inuse; - - ql = &rdi->qp_dev->qpt_lock; - spin_lock_irqsave(ql, flags); - for (n = 0; n < rdi->qp_dev->qp_table_size; n++) { - qp = rcu_dereference_protected(rdi->qp_dev->qp_table[n], - lockdep_is_held(ql)); - RCU_INIT_POINTER(rdi->qp_dev->qp_table[n], NULL); + rvt_qp_iter(rdi, (u64)&qp_inuse, rvt_free_qp_cb); - for (; qp; qp = rcu_dereference_protected(qp->next, - lockdep_is_held(ql))) - qp_inuse++; - } - spin_unlock_irqrestore(ql, flags); - synchronize_rcu(); return qp_inuse; } @@ -902,14 +905,14 @@ static void rvt_init_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, } /** - * rvt_reset_qp - initialize the QP state to the reset state + * _rvt_reset_qp - initialize the QP state to the reset state * @qp: the QP to reset * @type: the QP type * * r_lock, s_hlock, and s_lock are required to be held by the caller */ -static void rvt_reset_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, - enum ib_qp_type type) +static void _rvt_reset_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, + enum ib_qp_type type) __must_hold(&qp->s_lock) __must_hold(&qp->s_hlock) __must_hold(&qp->r_lock) @@ -955,6 +958,27 @@ static void rvt_reset_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, lockdep_assert_held(&qp->s_lock); } +/** + * rvt_reset_qp - initialize the QP state to the reset state + * @rdi: the device info + * @qp: the QP to reset + * @type: the QP type + * + * This is the wrapper function to acquire the r_lock, s_hlock, and s_lock + * before calling _rvt_reset_qp(). + */ +static void rvt_reset_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, + enum ib_qp_type type) +{ + spin_lock_irq(&qp->r_lock); + spin_lock(&qp->s_hlock); + spin_lock(&qp->s_lock); + _rvt_reset_qp(rdi, qp, type); + spin_unlock(&qp->s_lock); + spin_unlock(&qp->s_hlock); + spin_unlock_irq(&qp->r_lock); +} + /** rvt_free_qpn - Free a qpn from the bit map * @qpt: QP table * @qpn: queue pair number to free @@ -1546,7 +1570,7 @@ int rvt_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, switch (new_state) { case IB_QPS_RESET: if (qp->state != IB_QPS_RESET) - rvt_reset_qp(rdi, qp, ibqp->qp_type); + _rvt_reset_qp(rdi, qp, ibqp->qp_type); break; case IB_QPS_RTR: @@ -1695,13 +1719,7 @@ int rvt_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata) struct rvt_qp *qp = ibqp_to_rvtqp(ibqp); struct rvt_dev_info *rdi = ib_to_rvt(ibqp->device); - spin_lock_irq(&qp->r_lock); - spin_lock(&qp->s_hlock); - spin_lock(&qp->s_lock); rvt_reset_qp(rdi, qp, ibqp->qp_type); - spin_unlock(&qp->s_lock); - spin_unlock(&qp->s_hlock); - spin_unlock_irq(&qp->r_lock); wait_event(qp->wait, !atomic_read(&qp->refcount)); /* qpn is now available for use again */ diff --git a/drivers/infiniband/sw/rxe/rxe_comp.c b/drivers/infiniband/sw/rxe/rxe_comp.c index 116cafc9afcf..4bc88708b355 100644 --- a/drivers/infiniband/sw/rxe/rxe_comp.c +++ b/drivers/infiniband/sw/rxe/rxe_comp.c @@ -329,7 +329,7 @@ static inline enum comp_state check_ack(struct rxe_qp *qp, qp->comp.psn = pkt->psn; if (qp->req.wait_psn) { qp->req.wait_psn = 0; - rxe_run_task(&qp->req.task, 1); + rxe_run_task(&qp->req.task, 0); } } return COMPST_ERROR_RETRY; @@ -463,7 +463,7 @@ static void do_complete(struct rxe_qp *qp, struct rxe_send_wqe *wqe) */ if (qp->req.wait_fence) { qp->req.wait_fence = 0; - rxe_run_task(&qp->req.task, 1); + rxe_run_task(&qp->req.task, 0); } } @@ -479,7 +479,7 @@ static inline enum comp_state complete_ack(struct rxe_qp *qp, if (qp->req.need_rd_atomic) { qp->comp.timeout_retry = 0; qp->req.need_rd_atomic = 0; - rxe_run_task(&qp->req.task, 1); + rxe_run_task(&qp->req.task, 0); } } @@ -725,7 +725,7 @@ int rxe_completer(void *arg) RXE_CNT_COMP_RETRY); qp->req.need_retry = 1; qp->comp.started_retry = 1; - rxe_run_task(&qp->req.task, 1); + rxe_run_task(&qp->req.task, 0); } if (pkt) { diff --git a/drivers/infiniband/sw/siw/siw_cm.c b/drivers/infiniband/sw/siw/siw_cm.c index 0c3f0588346e..c5651a96b196 100644 --- a/drivers/infiniband/sw/siw/siw_cm.c +++ b/drivers/infiniband/sw/siw/siw_cm.c @@ -1225,10 +1225,9 @@ static void siw_cm_llp_data_ready(struct sock *sk) read_lock(&sk->sk_callback_lock); cep = sk_to_cep(sk); - if (!cep) { - WARN_ON(1); + if (!cep) goto out; - } + siw_dbg_cep(cep, "state: %d\n", cep->state); switch (cep->state) { diff --git a/drivers/input/keyboard/goldfish_events.c b/drivers/input/keyboard/goldfish_events.c index bc8c85a52a10..57d435fc5c73 100644 --- a/drivers/input/keyboard/goldfish_events.c +++ b/drivers/input/keyboard/goldfish_events.c @@ -30,7 +30,7 @@ struct event_dev { struct input_dev *input; int irq; void __iomem *addr; - char name[0]; + char name[]; }; static irqreturn_t events_interrupt(int irq, void *dev_id) diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c index 1f56d53454b2..53c9ff338dea 100644 --- a/drivers/input/keyboard/gpio_keys.c +++ b/drivers/input/keyboard/gpio_keys.c @@ -55,7 +55,7 @@ struct gpio_keys_drvdata { struct input_dev *input; struct mutex disable_lock; unsigned short *keymap; - struct gpio_button_data data[0]; + struct gpio_button_data data[]; }; /* diff --git a/drivers/input/keyboard/gpio_keys_polled.c b/drivers/input/keyboard/gpio_keys_polled.c index 6eb0a2f3f9de..c3937d2fc744 100644 --- a/drivers/input/keyboard/gpio_keys_polled.c +++ b/drivers/input/keyboard/gpio_keys_polled.c @@ -38,7 +38,7 @@ struct gpio_keys_polled_dev { const struct gpio_keys_platform_data *pdata; unsigned long rel_axis_seen[BITS_TO_LONGS(REL_CNT)]; unsigned long abs_axis_seen[BITS_TO_LONGS(ABS_CNT)]; - struct gpio_keys_button_data data[0]; + struct gpio_keys_button_data data[]; }; static void gpio_keys_button_event(struct input_dev *input, diff --git a/drivers/input/keyboard/tca6416-keypad.c b/drivers/input/keyboard/tca6416-keypad.c index 2a14769de637..21758767ccf0 100644 --- a/drivers/input/keyboard/tca6416-keypad.c +++ b/drivers/input/keyboard/tca6416-keypad.c @@ -33,7 +33,7 @@ MODULE_DEVICE_TABLE(i2c, tca6416_id); struct tca6416_drv_data { struct input_dev *input; - struct tca6416_button data[0]; + struct tca6416_button data[]; }; struct tca6416_keypad_chip { @@ -48,7 +48,7 @@ struct tca6416_keypad_chip { int irqnum; u16 pinmask; bool use_polling; - struct tca6416_button buttons[0]; + struct tca6416_button buttons[]; }; static int tca6416_write_reg(struct tca6416_keypad_chip *chip, int reg, u16 val) diff --git a/drivers/input/mouse/cyapa_gen5.c b/drivers/input/mouse/cyapa_gen5.c index 14239fbd72cf..7f012bfa2658 100644 --- a/drivers/input/mouse/cyapa_gen5.c +++ b/drivers/input/mouse/cyapa_gen5.c @@ -250,7 +250,7 @@ struct cyapa_tsg_bin_image_data_record { struct cyapa_tsg_bin_image { struct cyapa_tsg_bin_image_head image_head; - struct cyapa_tsg_bin_image_data_record records[0]; + struct cyapa_tsg_bin_image_data_record records[]; } __packed; struct pip_bl_packet_start { @@ -271,7 +271,7 @@ struct pip_bl_cmd_head { u8 report_id; /* Bootloader output report id, must be 40h */ u8 rsvd; /* Reserved, must be 0 */ struct pip_bl_packet_start packet_start; - u8 data[0]; /* Command data variable based on commands */ + u8 data[]; /* Command data variable based on commands */ } __packed; /* Initiate bootload command data structure. */ @@ -300,7 +300,7 @@ struct tsg_bl_metadata_row_params { struct tsg_bl_flash_row_head { u8 flash_array_id; __le16 flash_row_id; - u8 flash_data[0]; + u8 flash_data[]; } __packed; struct pip_app_cmd_head { @@ -314,7 +314,7 @@ struct pip_app_cmd_head { * Bit 6-0: command code. */ u8 cmd_code; - u8 parameter_data[0]; /* Parameter data variable based on cmd_code */ + u8 parameter_data[]; /* Parameter data variable based on cmd_code */ } __packed; /* Application get/set parameter command data structure */ diff --git a/drivers/input/mouse/psmouse-smbus.c b/drivers/input/mouse/psmouse-smbus.c index 027efdd2b2ad..a472489ccbad 100644 --- a/drivers/input/mouse/psmouse-smbus.c +++ b/drivers/input/mouse/psmouse-smbus.c @@ -190,6 +190,7 @@ static int psmouse_smbus_create_companion(struct device *dev, void *data) struct psmouse_smbus_dev *smbdev = data; unsigned short addr_list[] = { smbdev->board.addr, I2C_CLIENT_END }; struct i2c_adapter *adapter; + struct i2c_client *client; adapter = i2c_verify_adapter(dev); if (!adapter) @@ -198,12 +199,13 @@ static int psmouse_smbus_create_companion(struct device *dev, void *data) if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_HOST_NOTIFY)) return 0; - smbdev->client = i2c_new_probed_device(adapter, &smbdev->board, - addr_list, NULL); - if (!smbdev->client) + client = i2c_new_scanned_device(adapter, &smbdev->board, + addr_list, NULL); + if (IS_ERR(client)) return 0; /* We have our(?) device, stop iterating i2c bus. */ + smbdev->client = client; return 1; } diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index 1ae6f8bba9ae..2c666fb34625 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -146,7 +146,6 @@ static const char * const topbuttonpad_pnp_ids[] = { "LEN0042", /* Yoga */ "LEN0045", "LEN0047", - "LEN0049", "LEN2000", /* S540 */ "LEN2001", /* Edge E431 */ "LEN2002", /* Edge E531 */ @@ -166,9 +165,11 @@ static const char * const smbus_pnp_ids[] = { /* all of the topbuttonpad_pnp_ids are valid, we just add some extras */ "LEN0048", /* X1 Carbon 3 */ "LEN0046", /* X250 */ + "LEN0049", /* Yoga 11e */ "LEN004a", /* W541 */ "LEN005b", /* P50 */ "LEN005e", /* T560 */ + "LEN006c", /* T470s */ "LEN0071", /* T480 */ "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */ "LEN0073", /* X1 Carbon G5 (Elantech) */ @@ -179,6 +180,7 @@ static const char * const smbus_pnp_ids[] = { "LEN0097", /* X280 -> ALPS trackpoint */ "LEN009b", /* T580 */ "LEN200f", /* T450s */ + "LEN2044", /* L470 */ "LEN2054", /* E480 */ "LEN2055", /* E580 */ "SYN3052", /* HP EliteBook 840 G4 */ diff --git a/drivers/input/touchscreen/ili210x.c b/drivers/input/touchscreen/ili210x.c index 4a17096e83e1..199cf3daec10 100644 --- a/drivers/input/touchscreen/ili210x.c +++ b/drivers/input/touchscreen/ili210x.c @@ -167,6 +167,36 @@ static const struct ili2xxx_chip ili211x_chip = { .resolution = 2048, }; +static bool ili212x_touchdata_to_coords(const u8 *touchdata, + unsigned int finger, + unsigned int *x, unsigned int *y) +{ + u16 val; + + val = get_unaligned_be16(touchdata + 3 + (finger * 5) + 0); + if (!(val & BIT(15))) /* Touch indication */ + return false; + + *x = val & 0x3fff; + *y = get_unaligned_be16(touchdata + 3 + (finger * 5) + 2); + + return true; +} + +static bool ili212x_check_continue_polling(const u8 *data, bool touch) +{ + return touch; +} + +static const struct ili2xxx_chip ili212x_chip = { + .read_reg = ili210x_read_reg, + .get_touch_data = ili210x_read_touch_data, + .parse_touch_data = ili212x_touchdata_to_coords, + .continue_polling = ili212x_check_continue_polling, + .max_touches = 10, + .has_calibrate_reg = true, +}; + static int ili251x_read_reg(struct i2c_client *client, u8 reg, void *buf, size_t len) { @@ -321,7 +351,7 @@ static umode_t ili210x_calibrate_visible(struct kobject *kobj, struct i2c_client *client = to_i2c_client(dev); struct ili210x *priv = i2c_get_clientdata(client); - return priv->chip->has_calibrate_reg; + return priv->chip->has_calibrate_reg ? attr->mode : 0; } static const struct attribute_group ili210x_attr_group = { @@ -447,6 +477,7 @@ static int ili210x_i2c_probe(struct i2c_client *client, static const struct i2c_device_id ili210x_i2c_id[] = { { "ili210x", (long)&ili210x_chip }, { "ili2117", (long)&ili211x_chip }, + { "ili2120", (long)&ili212x_chip }, { "ili251x", (long)&ili251x_chip }, { } }; @@ -455,6 +486,7 @@ MODULE_DEVICE_TABLE(i2c, ili210x_i2c_id); static const struct of_device_id ili210x_dt_ids[] = { { .compatible = "ilitek,ili210x", .data = &ili210x_chip }, { .compatible = "ilitek,ili2117", .data = &ili211x_chip }, + { .compatible = "ilitek,ili2120", .data = &ili212x_chip }, { .compatible = "ilitek,ili251x", .data = &ili251x_chip }, { } }; diff --git a/drivers/md/bcache/alloc.c b/drivers/md/bcache/alloc.c index a1df0d95151c..8bc1faf71ff2 100644 --- a/drivers/md/bcache/alloc.c +++ b/drivers/md/bcache/alloc.c @@ -67,6 +67,7 @@ #include <linux/blkdev.h> #include <linux/kthread.h> #include <linux/random.h> +#include <linux/sched/signal.h> #include <trace/events/bcache.h> #define MAX_OPEN_BUCKETS 128 @@ -733,8 +734,21 @@ int bch_open_buckets_alloc(struct cache_set *c) int bch_cache_allocator_start(struct cache *ca) { - struct task_struct *k = kthread_run(bch_allocator_thread, - ca, "bcache_allocator"); + struct task_struct *k; + + /* + * In case previous btree check operation occupies too many + * system memory for bcache btree node cache, and the + * registering process is selected by OOM killer. Here just + * ignore the SIGKILL sent by OOM killer if there is, to + * avoid kthread_run() being failed by pending signals. The + * bcache registering process will exit after the registration + * done. + */ + if (signal_pending(current)) + flush_signals(current); + + k = kthread_run(bch_allocator_thread, ca, "bcache_allocator"); if (IS_ERR(k)) return PTR_ERR(k); diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c index fa872df4e770..b12186c87f52 100644 --- a/drivers/md/bcache/btree.c +++ b/drivers/md/bcache/btree.c @@ -34,6 +34,7 @@ #include <linux/random.h> #include <linux/rcupdate.h> #include <linux/sched/clock.h> +#include <linux/sched/signal.h> #include <linux/rculist.h> #include <linux/delay.h> #include <trace/events/bcache.h> @@ -1913,6 +1914,18 @@ static int bch_gc_thread(void *arg) int bch_gc_thread_start(struct cache_set *c) { + /* + * In case previous btree check operation occupies too many + * system memory for bcache btree node cache, and the + * registering process is selected by OOM killer. Here just + * ignore the SIGKILL sent by OOM killer if there is, to + * avoid kthread_run() being failed by pending signals. The + * bcache registering process will exit after the registration + * done. + */ + if (signal_pending(current)) + flush_signals(current); + c->gc_thread = kthread_run(bch_gc_thread, c, "bcache_gc"); return PTR_ERR_OR_ZERO(c->gc_thread); } diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c index 6730820780b0..0e3ff9745ac7 100644 --- a/drivers/md/bcache/journal.c +++ b/drivers/md/bcache/journal.c @@ -417,8 +417,6 @@ err: /* Journalling */ -#define nr_to_fifo_front(p, front_p, mask) (((p) - (front_p)) & (mask)) - static void btree_flush_write(struct cache_set *c) { struct btree *b, *t, *btree_nodes[BTREE_FLUSH_NR]; @@ -510,9 +508,8 @@ static void btree_flush_write(struct cache_set *c) * journal entry can be reclaimed). These selected nodes * will be ignored and skipped in the folowing for-loop. */ - if (nr_to_fifo_front(btree_current_write(b)->journal, - fifo_front_p, - mask) != 0) { + if (((btree_current_write(b)->journal - fifo_front_p) & + mask) != 0) { mutex_unlock(&b->write_lock); continue; } diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 2749daf09724..0c3c5419c52b 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -1917,23 +1917,6 @@ static int run_cache_set(struct cache_set *c) if (bch_btree_check(c)) goto err; - /* - * bch_btree_check() may occupy too much system memory which - * has negative effects to user space application (e.g. data - * base) performance. Shrink the mca cache memory proactively - * here to avoid competing memory with user space workloads.. - */ - if (!c->shrinker_disabled) { - struct shrink_control sc; - - sc.gfp_mask = GFP_KERNEL; - sc.nr_to_scan = c->btree_cache_used * c->btree_pages; - /* first run to clear b->accessed tag */ - c->shrink.scan_objects(&c->shrink, &sc); - /* second run to reap non-accessed nodes */ - c->shrink.scan_objects(&c->shrink, &sc); - } - bch_journal_mark(c, &journal); bch_initial_gc_finish(c); pr_debug("btree_check() done"); diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h index f332cb4b2fbf..79cad5e751c6 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.h +++ b/drivers/net/dsa/mv88e6xxx/chip.h @@ -236,7 +236,7 @@ struct mv88e6xxx_port { bool mirror_ingress; bool mirror_egress; unsigned int serdes_irq; - char serdes_irq_name[32]; + char serdes_irq_name[64]; }; struct mv88e6xxx_chip { @@ -293,16 +293,16 @@ struct mv88e6xxx_chip { struct mv88e6xxx_irq g1_irq; struct mv88e6xxx_irq g2_irq; int irq; - char irq_name[32]; + char irq_name[64]; int device_irq; - char device_irq_name[32]; + char device_irq_name[64]; int watchdog_irq; - char watchdog_irq_name[32]; + char watchdog_irq_name[64]; int atu_prob_irq; - char atu_prob_irq_name[32]; + char atu_prob_irq_name[64]; int vtu_prob_irq; - char vtu_prob_irq_name[32]; + char vtu_prob_irq_name[64]; struct kthread_worker *kworker; struct kthread_delayed_work irq_poll_work; diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c index ea62604fdf8c..1fb58f9ad80b 100644 --- a/drivers/net/ethernet/amazon/ena/ena_com.c +++ b/drivers/net/ethernet/amazon/ena/ena_com.c @@ -200,6 +200,11 @@ static void comp_ctxt_release(struct ena_com_admin_queue *queue, static struct ena_comp_ctx *get_comp_ctxt(struct ena_com_admin_queue *queue, u16 command_id, bool capture) { + if (unlikely(!queue->comp_ctx)) { + pr_err("Completion context is NULL\n"); + return NULL; + } + if (unlikely(command_id >= queue->q_depth)) { pr_err("command id is larger than the queue size. cmd_id: %u queue size %d\n", command_id, queue->q_depth); @@ -1041,9 +1046,41 @@ static int ena_com_get_feature(struct ena_com_dev *ena_dev, feature_ver); } +int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev) +{ + return ena_dev->rss.hash_func; +} + +static void ena_com_hash_key_fill_default_key(struct ena_com_dev *ena_dev) +{ + struct ena_admin_feature_rss_flow_hash_control *hash_key = + (ena_dev->rss).hash_key; + + netdev_rss_key_fill(&hash_key->key, sizeof(hash_key->key)); + /* The key is stored in the device in u32 array + * as well as the API requires the key to be passed in this + * format. Thus the size of our array should be divided by 4 + */ + hash_key->keys_num = sizeof(hash_key->key) / sizeof(u32); +} + static int ena_com_hash_key_allocate(struct ena_com_dev *ena_dev) { struct ena_rss *rss = &ena_dev->rss; + struct ena_admin_feature_rss_flow_hash_control *hash_key; + struct ena_admin_get_feat_resp get_resp; + int rc; + + hash_key = (ena_dev->rss).hash_key; + + rc = ena_com_get_feature_ex(ena_dev, &get_resp, + ENA_ADMIN_RSS_HASH_FUNCTION, + ena_dev->rss.hash_key_dma_addr, + sizeof(ena_dev->rss.hash_key), 0); + if (unlikely(rc)) { + hash_key = NULL; + return -EOPNOTSUPP; + } rss->hash_key = dma_alloc_coherent(ena_dev->dmadev, sizeof(*rss->hash_key), @@ -1254,30 +1291,6 @@ static int ena_com_ind_tbl_convert_to_device(struct ena_com_dev *ena_dev) return 0; } -static int ena_com_ind_tbl_convert_from_device(struct ena_com_dev *ena_dev) -{ - u16 dev_idx_to_host_tbl[ENA_TOTAL_NUM_QUEUES] = { (u16)-1 }; - struct ena_rss *rss = &ena_dev->rss; - u8 idx; - u16 i; - - for (i = 0; i < ENA_TOTAL_NUM_QUEUES; i++) - dev_idx_to_host_tbl[ena_dev->io_sq_queues[i].idx] = i; - - for (i = 0; i < 1 << rss->tbl_log_size; i++) { - if (rss->rss_ind_tbl[i].cq_idx > ENA_TOTAL_NUM_QUEUES) - return -EINVAL; - idx = (u8)rss->rss_ind_tbl[i].cq_idx; - - if (dev_idx_to_host_tbl[idx] > ENA_TOTAL_NUM_QUEUES) - return -EINVAL; - - rss->host_rss_ind_tbl[i] = dev_idx_to_host_tbl[idx]; - } - - return 0; -} - static void ena_com_update_intr_delay_resolution(struct ena_com_dev *ena_dev, u16 intr_delay_resolution) { @@ -2297,15 +2310,16 @@ int ena_com_fill_hash_function(struct ena_com_dev *ena_dev, switch (func) { case ENA_ADMIN_TOEPLITZ: - if (key_len > sizeof(hash_key->key)) { - pr_err("key len (%hu) is bigger than the max supported (%zu)\n", - key_len, sizeof(hash_key->key)); - return -EINVAL; + if (key) { + if (key_len != sizeof(hash_key->key)) { + pr_err("key len (%hu) doesn't equal the supported size (%zu)\n", + key_len, sizeof(hash_key->key)); + return -EINVAL; + } + memcpy(hash_key->key, key, key_len); + rss->hash_init_val = init_val; + hash_key->keys_num = key_len >> 2; } - - memcpy(hash_key->key, key, key_len); - rss->hash_init_val = init_val; - hash_key->keys_num = key_len >> 2; break; case ENA_ADMIN_CRC32: rss->hash_init_val = init_val; @@ -2342,7 +2356,11 @@ int ena_com_get_hash_function(struct ena_com_dev *ena_dev, if (unlikely(rc)) return rc; - rss->hash_func = get_resp.u.flow_hash_func.selected_func; + /* ffs() returns 1 in case the lsb is set */ + rss->hash_func = ffs(get_resp.u.flow_hash_func.selected_func); + if (rss->hash_func) + rss->hash_func--; + if (func) *func = rss->hash_func; @@ -2606,10 +2624,6 @@ int ena_com_indirect_table_get(struct ena_com_dev *ena_dev, u32 *ind_tbl) if (!ind_tbl) return 0; - rc = ena_com_ind_tbl_convert_from_device(ena_dev); - if (unlikely(rc)) - return rc; - for (i = 0; i < (1 << rss->tbl_log_size); i++) ind_tbl[i] = rss->host_rss_ind_tbl[i]; @@ -2626,9 +2640,15 @@ int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 indr_tbl_log_size) if (unlikely(rc)) goto err_indr_tbl; + /* The following function might return unsupported in case the + * device doesn't support setting the key / hash function. We can safely + * ignore this error and have indirection table support only. + */ rc = ena_com_hash_key_allocate(ena_dev); - if (unlikely(rc)) + if (unlikely(rc) && rc != -EOPNOTSUPP) goto err_hash_key; + else if (rc != -EOPNOTSUPP) + ena_com_hash_key_fill_default_key(ena_dev); rc = ena_com_hash_ctrl_init(ena_dev); if (unlikely(rc)) diff --git a/drivers/net/ethernet/amazon/ena/ena_com.h b/drivers/net/ethernet/amazon/ena/ena_com.h index 0ce37d54ed10..469f298199a7 100644 --- a/drivers/net/ethernet/amazon/ena/ena_com.h +++ b/drivers/net/ethernet/amazon/ena/ena_com.h @@ -44,6 +44,7 @@ #include <linux/spinlock.h> #include <linux/types.h> #include <linux/wait.h> +#include <linux/netdevice.h> #include "ena_common_defs.h" #include "ena_admin_defs.h" @@ -655,6 +656,14 @@ int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 log_size); */ void ena_com_rss_destroy(struct ena_com_dev *ena_dev); +/* ena_com_get_current_hash_function - Get RSS hash function + * @ena_dev: ENA communication layer struct + * + * Return the current hash function. + * @return: 0 or one of the ena_admin_hash_functions values. + */ +int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev); + /* ena_com_fill_hash_function - Fill RSS hash function * @ena_dev: ENA communication layer struct * @func: The hash function (Toeplitz or crc) diff --git a/drivers/net/ethernet/amazon/ena/ena_ethtool.c b/drivers/net/ethernet/amazon/ena/ena_ethtool.c index b4e891d49a94..ced1d577b62a 100644 --- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c +++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c @@ -636,6 +636,28 @@ static u32 ena_get_rxfh_key_size(struct net_device *netdev) return ENA_HASH_KEY_SIZE; } +static int ena_indirection_table_get(struct ena_adapter *adapter, u32 *indir) +{ + struct ena_com_dev *ena_dev = adapter->ena_dev; + int i, rc; + + if (!indir) + return 0; + + rc = ena_com_indirect_table_get(ena_dev, indir); + if (rc) + return rc; + + /* Our internal representation of the indices is: even indices + * for Tx and uneven indices for Rx. We need to convert the Rx + * indices to be consecutive + */ + for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++) + indir[i] = ENA_IO_RXQ_IDX_TO_COMBINED_IDX(indir[i]); + + return rc; +} + static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key, u8 *hfunc) { @@ -644,11 +666,25 @@ static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key, u8 func; int rc; - rc = ena_com_indirect_table_get(adapter->ena_dev, indir); + rc = ena_indirection_table_get(adapter, indir); if (rc) return rc; + /* We call this function in order to check if the device + * supports getting/setting the hash function. + */ rc = ena_com_get_hash_function(adapter->ena_dev, &ena_func, key); + + if (rc) { + if (rc == -EOPNOTSUPP) { + key = NULL; + hfunc = NULL; + rc = 0; + } + + return rc; + } + if (rc) return rc; @@ -657,7 +693,7 @@ static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key, func = ETH_RSS_HASH_TOP; break; case ENA_ADMIN_CRC32: - func = ETH_RSS_HASH_XOR; + func = ETH_RSS_HASH_CRC32; break; default: netif_err(adapter, drv, netdev, @@ -700,10 +736,13 @@ static int ena_set_rxfh(struct net_device *netdev, const u32 *indir, } switch (hfunc) { + case ETH_RSS_HASH_NO_CHANGE: + func = ena_com_get_current_hash_function(ena_dev); + break; case ETH_RSS_HASH_TOP: func = ENA_ADMIN_TOEPLITZ; break; - case ETH_RSS_HASH_XOR: + case ETH_RSS_HASH_CRC32: func = ENA_ADMIN_CRC32; break; default: @@ -814,6 +853,7 @@ static const struct ethtool_ops ena_ethtool_ops = { .set_channels = ena_set_channels, .get_tunable = ena_get_tunable, .set_tunable = ena_set_tunable, + .get_ts_info = ethtool_op_get_ts_info, }; void ena_set_ethtool_ops(struct net_device *netdev) diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c index 894e8c1a8cf1..0b2fd96b93d7 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -3706,8 +3706,8 @@ static void check_for_missing_keep_alive(struct ena_adapter *adapter) if (adapter->keep_alive_timeout == ENA_HW_HINTS_NO_TIMEOUT) return; - keep_alive_expired = round_jiffies(adapter->last_keep_alive_jiffies + - adapter->keep_alive_timeout); + keep_alive_expired = adapter->last_keep_alive_jiffies + + adapter->keep_alive_timeout; if (unlikely(time_is_before_jiffies(keep_alive_expired))) { netif_err(adapter, drv, adapter->netdev, "Keep alive watchdog timeout.\n"); @@ -3809,7 +3809,7 @@ static void ena_timer_service(struct timer_list *t) } /* Reset the timer */ - mod_timer(&adapter->timer_service, jiffies + HZ); + mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ)); } static int ena_calc_max_io_queue_num(struct pci_dev *pdev, diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h index 094324fd0edc..8795e0b1dc3c 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.h +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h @@ -130,6 +130,8 @@ #define ENA_IO_TXQ_IDX(q) (2 * (q)) #define ENA_IO_RXQ_IDX(q) (2 * (q) + 1) +#define ENA_IO_TXQ_IDX_TO_COMBINED_IDX(q) ((q) / 2) +#define ENA_IO_RXQ_IDX_TO_COMBINED_IDX(q) (((q) - 1) / 2) #define ENA_MGMNT_IRQ_IDX 0 #define ENA_IO_IRQ_FIRST_IDX 1 diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c index bbd7b3175f09..ddf60dc9ad16 100644 --- a/drivers/net/ethernet/cisco/enic/enic_main.c +++ b/drivers/net/ethernet/cisco/enic/enic_main.c @@ -2013,10 +2013,10 @@ static int enic_stop(struct net_device *netdev) napi_disable(&enic->napi[i]); netif_carrier_off(netdev); - netif_tx_disable(netdev); if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) for (i = 0; i < enic->wq_count; i++) napi_disable(&enic->napi[enic_cq_wq(enic, i)]); + netif_tx_disable(netdev); if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) enic_dev_del_station_addr(enic); diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c index ec5f6eeb639b..492bc9446463 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c @@ -6113,6 +6113,9 @@ static int hclge_get_all_rules(struct hnae3_handle *handle, static void hclge_fd_get_flow_tuples(const struct flow_keys *fkeys, struct hclge_fd_rule_tuples *tuples) { +#define flow_ip6_src fkeys->addrs.v6addrs.src.in6_u.u6_addr32 +#define flow_ip6_dst fkeys->addrs.v6addrs.dst.in6_u.u6_addr32 + tuples->ether_proto = be16_to_cpu(fkeys->basic.n_proto); tuples->ip_proto = fkeys->basic.ip_proto; tuples->dst_port = be16_to_cpu(fkeys->ports.dst); @@ -6121,12 +6124,12 @@ static void hclge_fd_get_flow_tuples(const struct flow_keys *fkeys, tuples->src_ip[3] = be32_to_cpu(fkeys->addrs.v4addrs.src); tuples->dst_ip[3] = be32_to_cpu(fkeys->addrs.v4addrs.dst); } else { - memcpy(tuples->src_ip, - fkeys->addrs.v6addrs.src.in6_u.u6_addr32, - sizeof(tuples->src_ip)); - memcpy(tuples->dst_ip, - fkeys->addrs.v6addrs.dst.in6_u.u6_addr32, - sizeof(tuples->dst_ip)); + int i; + + for (i = 0; i < IPV6_SIZE; i++) { + tuples->src_ip[i] = be32_to_cpu(flow_ip6_src[i]); + tuples->dst_ip[i] = be32_to_cpu(flow_ip6_dst[i]); + } } } @@ -9834,6 +9837,13 @@ static int hclge_reset_ae_dev(struct hnae3_ae_dev *ae_dev) return ret; } + ret = init_mgr_tbl(hdev); + if (ret) { + dev_err(&pdev->dev, + "failed to reinit manager table, ret = %d\n", ret); + return ret; + } + ret = hclge_init_fd_config(hdev); if (ret) { dev_err(&pdev->dev, "fd table init fail, ret=%d\n", ret); diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c index 180224eab1ca..28db13253a5e 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c @@ -566,7 +566,7 @@ static void hclge_tm_vport_tc_info_update(struct hclge_vport *vport) */ kinfo->num_tc = vport->vport_id ? 1 : min_t(u16, vport->alloc_tqps, hdev->tm_info.num_tc); - vport->qs_offset = (vport->vport_id ? hdev->tm_info.num_tc : 0) + + vport->qs_offset = (vport->vport_id ? HNAE3_MAX_TC : 0) + (vport->vport_id ? (vport->vport_id - 1) : 0); max_rss_size = min_t(u16, hdev->rss_size_max, diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c index 69523ac85639..56b9e445732b 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -2362,7 +2362,7 @@ static int i40e_vc_enable_queues_msg(struct i40e_vf *vf, u8 *msg) goto error_param; } - if (i40e_vc_validate_vqs_bitmaps(vqs)) { + if (!i40e_vc_validate_vqs_bitmaps(vqs)) { aq_ret = I40E_ERR_PARAM; goto error_param; } @@ -2424,7 +2424,7 @@ static int i40e_vc_disable_queues_msg(struct i40e_vf *vf, u8 *msg) goto error_param; } - if (i40e_vc_validate_vqs_bitmaps(vqs)) { + if (!i40e_vc_validate_vqs_bitmaps(vqs)) { aq_ret = I40E_ERR_PARAM; goto error_param; } diff --git a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h index 4459bc564b11..6873998cf145 100644 --- a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h +++ b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h @@ -1660,6 +1660,7 @@ struct ice_aqc_get_pkg_info_resp { __le32 count; struct ice_aqc_get_pkg_info pkg_info[1]; }; + /** * struct ice_aq_desc - Admin Queue (AQ) descriptor * @flags: ICE_AQ_FLAG_* flags diff --git a/drivers/net/ethernet/intel/ice/ice_base.c b/drivers/net/ethernet/intel/ice/ice_base.c index d8e975cceb21..81885efadc7a 100644 --- a/drivers/net/ethernet/intel/ice/ice_base.c +++ b/drivers/net/ethernet/intel/ice/ice_base.c @@ -324,7 +324,7 @@ int ice_setup_rx_ctx(struct ice_ring *ring) if (err) return err; - dev_info(&vsi->back->pdev->dev, "Registered XDP mem model MEM_TYPE_ZERO_COPY on Rx ring %d\n", + dev_info(ice_pf_to_dev(vsi->back), "Registered XDP mem model MEM_TYPE_ZERO_COPY on Rx ring %d\n", ring->q_index); } else { ring->zca.free = NULL; @@ -405,8 +405,7 @@ int ice_setup_rx_ctx(struct ice_ring *ring) /* Absolute queue number out of 2K needs to be passed */ err = ice_write_rxq_ctx(hw, &rlan_ctx, pf_q); if (err) { - dev_err(&vsi->back->pdev->dev, - "Failed to set LAN Rx queue context for absolute Rx queue %d error: %d\n", + dev_err(ice_pf_to_dev(vsi->back), "Failed to set LAN Rx queue context for absolute Rx queue %d error: %d\n", pf_q, err); return -EIO; } @@ -428,8 +427,7 @@ int ice_setup_rx_ctx(struct ice_ring *ring) ice_alloc_rx_bufs_slow_zc(ring, ICE_DESC_UNUSED(ring)) : ice_alloc_rx_bufs(ring, ICE_DESC_UNUSED(ring)); if (err) - dev_info(&vsi->back->pdev->dev, - "Failed allocate some buffers on %sRx ring %d (pf_q %d)\n", + dev_info(ice_pf_to_dev(vsi->back), "Failed allocate some buffers on %sRx ring %d (pf_q %d)\n", ring->xsk_umem ? "UMEM enabled " : "", ring->q_index, pf_q); @@ -490,8 +488,7 @@ int ice_vsi_ctrl_rx_ring(struct ice_vsi *vsi, bool ena, u16 rxq_idx) /* wait for the change to finish */ ret = ice_pf_rxq_wait(pf, pf_q, ena); if (ret) - dev_err(ice_pf_to_dev(pf), - "VSI idx %d Rx ring %d %sable timeout\n", + dev_err(ice_pf_to_dev(pf), "VSI idx %d Rx ring %d %sable timeout\n", vsi->idx, pf_q, (ena ? "en" : "dis")); return ret; @@ -506,20 +503,15 @@ int ice_vsi_ctrl_rx_ring(struct ice_vsi *vsi, bool ena, u16 rxq_idx) */ int ice_vsi_alloc_q_vectors(struct ice_vsi *vsi) { - struct ice_pf *pf = vsi->back; - int v_idx = 0, num_q_vectors; - struct device *dev; - int err; + struct device *dev = ice_pf_to_dev(vsi->back); + int v_idx, err; - dev = ice_pf_to_dev(pf); if (vsi->q_vectors[0]) { dev_dbg(dev, "VSI %d has existing q_vectors\n", vsi->vsi_num); return -EEXIST; } - num_q_vectors = vsi->num_q_vectors; - - for (v_idx = 0; v_idx < num_q_vectors; v_idx++) { + for (v_idx = 0; v_idx < vsi->num_q_vectors; v_idx++) { err = ice_vsi_alloc_q_vector(vsi, v_idx); if (err) goto err_out; @@ -648,8 +640,7 @@ ice_vsi_cfg_txq(struct ice_vsi *vsi, struct ice_ring *ring, status = ice_ena_vsi_txq(vsi->port_info, vsi->idx, tc, ring->q_handle, 1, qg_buf, buf_len, NULL); if (status) { - dev_err(ice_pf_to_dev(pf), - "Failed to set LAN Tx queue context, error: %d\n", + dev_err(ice_pf_to_dev(pf), "Failed to set LAN Tx queue context, error: %d\n", status); return -ENODEV; } @@ -815,14 +806,12 @@ ice_vsi_stop_tx_ring(struct ice_vsi *vsi, enum ice_disq_rst_src rst_src, * queues at the hardware level anyway. */ if (status == ICE_ERR_RESET_ONGOING) { - dev_dbg(&vsi->back->pdev->dev, - "Reset in progress. LAN Tx queues already disabled\n"); + dev_dbg(ice_pf_to_dev(vsi->back), "Reset in progress. LAN Tx queues already disabled\n"); } else if (status == ICE_ERR_DOES_NOT_EXIST) { - dev_dbg(&vsi->back->pdev->dev, - "LAN Tx queues do not exist, nothing to disable\n"); + dev_dbg(ice_pf_to_dev(vsi->back), "LAN Tx queues do not exist, nothing to disable\n"); } else if (status) { - dev_err(&vsi->back->pdev->dev, - "Failed to disable LAN Tx queues, error: %d\n", status); + dev_err(ice_pf_to_dev(vsi->back), "Failed to disable LAN Tx queues, error: %d\n", + status); return -ENODEV; } diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c index 0207e28c2682..04d5db0a25bf 100644 --- a/drivers/net/ethernet/intel/ice/ice_common.c +++ b/drivers/net/ethernet/intel/ice/ice_common.c @@ -25,20 +25,6 @@ static enum ice_status ice_set_mac_type(struct ice_hw *hw) } /** - * ice_dev_onetime_setup - Temporary HW/FW workarounds - * @hw: pointer to the HW structure - * - * This function provides temporary workarounds for certain issues - * that are expected to be fixed in the HW/FW. - */ -void ice_dev_onetime_setup(struct ice_hw *hw) -{ -#define MBX_PF_VT_PFALLOC 0x00231E80 - /* set VFs per PF */ - wr32(hw, MBX_PF_VT_PFALLOC, rd32(hw, PF_VT_PFALLOC_HIF)); -} - -/** * ice_clear_pf_cfg - Clear PF configuration * @hw: pointer to the hardware structure * @@ -602,10 +588,10 @@ void ice_output_fw_log(struct ice_hw *hw, struct ice_aq_desc *desc, void *buf) } /** - * ice_get_itr_intrl_gran - determine int/intrl granularity + * ice_get_itr_intrl_gran * @hw: pointer to the HW struct * - * Determines the ITR/intrl granularities based on the maximum aggregate + * Determines the ITR/INTRL granularities based on the maximum aggregate * bandwidth according to the device's configuration during power-on. */ static void ice_get_itr_intrl_gran(struct ice_hw *hw) @@ -763,8 +749,6 @@ enum ice_status ice_init_hw(struct ice_hw *hw) if (status) goto err_unroll_sched; - ice_dev_onetime_setup(hw); - /* Get MAC information */ /* A single port can report up to two (LAN and WoL) addresses */ mac_buf = devm_kcalloc(ice_hw_to_dev(hw), 2, @@ -834,7 +818,7 @@ void ice_deinit_hw(struct ice_hw *hw) */ enum ice_status ice_check_reset(struct ice_hw *hw) { - u32 cnt, reg = 0, grst_delay; + u32 cnt, reg = 0, grst_delay, uld_mask; /* Poll for Device Active state in case a recent CORER, GLOBR, * or EMPR has occurred. The grst delay value is in 100ms units. @@ -856,13 +840,20 @@ enum ice_status ice_check_reset(struct ice_hw *hw) return ICE_ERR_RESET_FAILED; } -#define ICE_RESET_DONE_MASK (GLNVM_ULD_CORER_DONE_M | \ - GLNVM_ULD_GLOBR_DONE_M) +#define ICE_RESET_DONE_MASK (GLNVM_ULD_PCIER_DONE_M |\ + GLNVM_ULD_PCIER_DONE_1_M |\ + GLNVM_ULD_CORER_DONE_M |\ + GLNVM_ULD_GLOBR_DONE_M |\ + GLNVM_ULD_POR_DONE_M |\ + GLNVM_ULD_POR_DONE_1_M |\ + GLNVM_ULD_PCIER_DONE_2_M) + + uld_mask = ICE_RESET_DONE_MASK; /* Device is Active; check Global Reset processes are done */ for (cnt = 0; cnt < ICE_PF_RESET_WAIT_COUNT; cnt++) { - reg = rd32(hw, GLNVM_ULD) & ICE_RESET_DONE_MASK; - if (reg == ICE_RESET_DONE_MASK) { + reg = rd32(hw, GLNVM_ULD) & uld_mask; + if (reg == uld_mask) { ice_debug(hw, ICE_DBG_INIT, "Global reset processes done. %d\n", cnt); break; diff --git a/drivers/net/ethernet/intel/ice/ice_common.h b/drivers/net/ethernet/intel/ice/ice_common.h index b5c013fdaaf9..f9fc005d35a7 100644 --- a/drivers/net/ethernet/intel/ice/ice_common.h +++ b/drivers/net/ethernet/intel/ice/ice_common.h @@ -54,8 +54,6 @@ enum ice_status ice_get_caps(struct ice_hw *hw); void ice_set_safe_mode_caps(struct ice_hw *hw); -void ice_dev_onetime_setup(struct ice_hw *hw); - enum ice_status ice_write_rxq_ctx(struct ice_hw *hw, struct ice_rlan_ctx *rlan_ctx, u32 rxq_index); diff --git a/drivers/net/ethernet/intel/ice/ice_dcb.c b/drivers/net/ethernet/intel/ice/ice_dcb.c index 713e8a892e14..adb8dab765c8 100644 --- a/drivers/net/ethernet/intel/ice/ice_dcb.c +++ b/drivers/net/ethernet/intel/ice/ice_dcb.c @@ -1323,13 +1323,13 @@ enum ice_status ice_set_dcb_cfg(struct ice_port_info *pi) } /** - * ice_aq_query_port_ets - query port ets configuration + * ice_aq_query_port_ets - query port ETS configuration * @pi: port information structure * @buf: pointer to buffer * @buf_size: buffer size in bytes * @cd: pointer to command details structure or NULL * - * query current port ets configuration + * query current port ETS configuration */ static enum ice_status ice_aq_query_port_ets(struct ice_port_info *pi, @@ -1416,13 +1416,13 @@ ice_update_port_tc_tree_cfg(struct ice_port_info *pi, } /** - * ice_query_port_ets - query port ets configuration + * ice_query_port_ets - query port ETS configuration * @pi: port information structure * @buf: pointer to buffer * @buf_size: buffer size in bytes * @cd: pointer to command details structure or NULL * - * query current port ets configuration and update the + * query current port ETS configuration and update the * SW DB with the TC changes */ enum ice_status diff --git a/drivers/net/ethernet/intel/ice/ice_dcb_lib.c b/drivers/net/ethernet/intel/ice/ice_dcb_lib.c index 0664e5b8d130..7108fb41b604 100644 --- a/drivers/net/ethernet/intel/ice/ice_dcb_lib.c +++ b/drivers/net/ethernet/intel/ice/ice_dcb_lib.c @@ -315,9 +315,9 @@ ice_dcb_need_recfg(struct ice_pf *pf, struct ice_dcbx_cfg *old_cfg, */ void ice_dcb_rebuild(struct ice_pf *pf) { - struct ice_dcbx_cfg *local_dcbx_cfg, *desired_dcbx_cfg, *prev_cfg; struct ice_aqc_port_ets_elem buf = { 0 }; struct device *dev = ice_pf_to_dev(pf); + struct ice_dcbx_cfg *err_cfg; enum ice_status ret; ret = ice_query_port_ets(pf->hw.port_info, &buf, sizeof(buf), NULL); @@ -330,53 +330,25 @@ void ice_dcb_rebuild(struct ice_pf *pf) if (!test_bit(ICE_FLAG_DCB_ENA, pf->flags)) return; - local_dcbx_cfg = &pf->hw.port_info->local_dcbx_cfg; - desired_dcbx_cfg = &pf->hw.port_info->desired_dcbx_cfg; + mutex_lock(&pf->tc_mutex); - /* Save current willing state and force FW to unwilling */ - local_dcbx_cfg->etscfg.willing = 0x0; - local_dcbx_cfg->pfc.willing = 0x0; - local_dcbx_cfg->app_mode = ICE_DCBX_APPS_NON_WILLING; + if (!pf->hw.port_info->is_sw_lldp) + ice_cfg_etsrec_defaults(pf->hw.port_info); - ice_cfg_etsrec_defaults(pf->hw.port_info); ret = ice_set_dcb_cfg(pf->hw.port_info); if (ret) { - dev_err(dev, "Failed to set DCB to unwilling\n"); + dev_err(dev, "Failed to set DCB config in rebuild\n"); goto dcb_error; } - /* Retrieve DCB config and ensure same as current in SW */ - prev_cfg = kmemdup(local_dcbx_cfg, sizeof(*prev_cfg), GFP_KERNEL); - if (!prev_cfg) - goto dcb_error; - - ice_init_dcb(&pf->hw, true); - if (pf->hw.port_info->dcbx_status == ICE_DCBX_STATUS_DIS) - pf->hw.port_info->is_sw_lldp = true; - else - pf->hw.port_info->is_sw_lldp = false; - - if (ice_dcb_need_recfg(pf, prev_cfg, local_dcbx_cfg)) { - /* difference in cfg detected - disable DCB till next MIB */ - dev_err(dev, "Set local MIB not accurate\n"); - kfree(prev_cfg); - goto dcb_error; + if (!pf->hw.port_info->is_sw_lldp) { + ret = ice_cfg_lldp_mib_change(&pf->hw, true); + if (ret && !pf->hw.port_info->is_sw_lldp) { + dev_err(dev, "Failed to register for MIB changes\n"); + goto dcb_error; + } } - /* fetched config congruent to previous configuration */ - kfree(prev_cfg); - - /* Set the local desired config */ - if (local_dcbx_cfg->dcbx_mode == ICE_DCBX_MODE_CEE) - memcpy(local_dcbx_cfg, desired_dcbx_cfg, - sizeof(*local_dcbx_cfg)); - - ice_cfg_etsrec_defaults(pf->hw.port_info); - ret = ice_set_dcb_cfg(pf->hw.port_info); - if (ret) { - dev_err(dev, "Failed to set desired config\n"); - goto dcb_error; - } dev_info(dev, "DCB restored after reset\n"); ret = ice_query_port_ets(pf->hw.port_info, &buf, sizeof(buf), NULL); if (ret) { @@ -384,26 +356,32 @@ void ice_dcb_rebuild(struct ice_pf *pf) goto dcb_error; } + mutex_unlock(&pf->tc_mutex); + return; dcb_error: dev_err(dev, "Disabling DCB until new settings occur\n"); - prev_cfg = kzalloc(sizeof(*prev_cfg), GFP_KERNEL); - if (!prev_cfg) + err_cfg = kzalloc(sizeof(*err_cfg), GFP_KERNEL); + if (!err_cfg) { + mutex_unlock(&pf->tc_mutex); return; + } - prev_cfg->etscfg.willing = true; - prev_cfg->etscfg.tcbwtable[0] = ICE_TC_MAX_BW; - prev_cfg->etscfg.tsatable[0] = ICE_IEEE_TSA_ETS; - memcpy(&prev_cfg->etsrec, &prev_cfg->etscfg, sizeof(prev_cfg->etsrec)); + err_cfg->etscfg.willing = true; + err_cfg->etscfg.tcbwtable[0] = ICE_TC_MAX_BW; + err_cfg->etscfg.tsatable[0] = ICE_IEEE_TSA_ETS; + memcpy(&err_cfg->etsrec, &err_cfg->etscfg, sizeof(err_cfg->etsrec)); /* Coverity warns the return code of ice_pf_dcb_cfg() is not checked * here as is done for other calls to that function. That check is * not necessary since this is in this function's error cleanup path. * Suppress the Coverity warning with the following comment... */ /* coverity[check_return] */ - ice_pf_dcb_cfg(pf, prev_cfg, false); - kfree(prev_cfg); + ice_pf_dcb_cfg(pf, err_cfg, false); + kfree(err_cfg); + + mutex_unlock(&pf->tc_mutex); } /** @@ -434,9 +412,9 @@ static int ice_dcb_init_cfg(struct ice_pf *pf, bool locked) } /** - * ice_dcb_sw_default_config - Apply a default DCB config + * ice_dcb_sw_dflt_cfg - Apply a default DCB config * @pf: PF to apply config to - * @ets_willing: configure ets willing + * @ets_willing: configure ETS willing * @locked: was this function called with RTNL held */ static int ice_dcb_sw_dflt_cfg(struct ice_pf *pf, bool ets_willing, bool locked) @@ -599,8 +577,7 @@ int ice_init_pf_dcb(struct ice_pf *pf, bool locked) goto dcb_init_err; } - dev_info(dev, - "DCB is enabled in the hardware, max number of TCs supported on this port are %d\n", + dev_info(dev, "DCB is enabled in the hardware, max number of TCs supported on this port are %d\n", pf->hw.func_caps.common_cap.maxtc); if (err) { struct ice_vsi *pf_vsi; @@ -610,8 +587,8 @@ int ice_init_pf_dcb(struct ice_pf *pf, bool locked) clear_bit(ICE_FLAG_FW_LLDP_AGENT, pf->flags); err = ice_dcb_sw_dflt_cfg(pf, true, locked); if (err) { - dev_err(dev, - "Failed to set local DCB config %d\n", err); + dev_err(dev, "Failed to set local DCB config %d\n", + err); err = -EIO; goto dcb_init_err; } @@ -777,6 +754,8 @@ ice_dcb_process_lldp_set_mib_change(struct ice_pf *pf, } } + mutex_lock(&pf->tc_mutex); + /* store the old configuration */ tmp_dcbx_cfg = pf->hw.port_info->local_dcbx_cfg; @@ -787,20 +766,20 @@ ice_dcb_process_lldp_set_mib_change(struct ice_pf *pf, ret = ice_get_dcb_cfg(pf->hw.port_info); if (ret) { dev_err(dev, "Failed to get DCB config\n"); - return; + goto out; } /* No change detected in DCBX configs */ if (!memcmp(&tmp_dcbx_cfg, &pi->local_dcbx_cfg, sizeof(tmp_dcbx_cfg))) { dev_dbg(dev, "No change detected in DCBX configuration.\n"); - return; + goto out; } need_reconfig = ice_dcb_need_recfg(pf, &tmp_dcbx_cfg, &pi->local_dcbx_cfg); ice_dcbnl_flush_apps(pf, &tmp_dcbx_cfg, &pi->local_dcbx_cfg); if (!need_reconfig) - return; + goto out; /* Enable DCB tagging only when more than one TC */ if (ice_dcb_get_num_tc(&pi->local_dcbx_cfg) > 1) { @@ -814,7 +793,7 @@ ice_dcb_process_lldp_set_mib_change(struct ice_pf *pf, pf_vsi = ice_get_main_vsi(pf); if (!pf_vsi) { dev_dbg(dev, "PF VSI doesn't exist\n"); - return; + goto out; } rtnl_lock(); @@ -823,13 +802,15 @@ ice_dcb_process_lldp_set_mib_change(struct ice_pf *pf, ret = ice_query_port_ets(pf->hw.port_info, &buf, sizeof(buf), NULL); if (ret) { dev_err(dev, "Query Port ETS failed\n"); - rtnl_unlock(); - return; + goto unlock_rtnl; } /* changes in configuration update VSI */ ice_pf_dcb_recfg(pf); ice_ena_vsi(pf_vsi, true); +unlock_rtnl: rtnl_unlock(); +out: + mutex_unlock(&pf->tc_mutex); } diff --git a/drivers/net/ethernet/intel/ice/ice_dcb_nl.c b/drivers/net/ethernet/intel/ice/ice_dcb_nl.c index d870c1aedc17..b61aba428adb 100644 --- a/drivers/net/ethernet/intel/ice/ice_dcb_nl.c +++ b/drivers/net/ethernet/intel/ice/ice_dcb_nl.c @@ -297,8 +297,7 @@ ice_dcbnl_get_pfc_cfg(struct net_device *netdev, int prio, u8 *setting) return; *setting = (pi->local_dcbx_cfg.pfc.pfcena >> prio) & 0x1; - dev_dbg(ice_pf_to_dev(pf), - "Get PFC Config up=%d, setting=%d, pfcenable=0x%x\n", + dev_dbg(ice_pf_to_dev(pf), "Get PFC Config up=%d, setting=%d, pfcenable=0x%x\n", prio, *setting, pi->local_dcbx_cfg.pfc.pfcena); } @@ -418,8 +417,8 @@ ice_dcbnl_get_pg_tc_cfg_tx(struct net_device *netdev, int prio, return; *pgid = pi->local_dcbx_cfg.etscfg.prio_table[prio]; - dev_dbg(ice_pf_to_dev(pf), - "Get PG config prio=%d tc=%d\n", prio, *pgid); + dev_dbg(ice_pf_to_dev(pf), "Get PG config prio=%d tc=%d\n", prio, + *pgid); } /** @@ -713,13 +712,13 @@ static int ice_dcbnl_delapp(struct net_device *netdev, struct dcb_app *app) return -EINVAL; mutex_lock(&pf->tc_mutex); - ret = dcb_ieee_delapp(netdev, app); - if (ret) - goto delapp_out; - old_cfg = &pf->hw.port_info->local_dcbx_cfg; - if (old_cfg->numapps == 1) + if (old_cfg->numapps <= 1) + goto delapp_out; + + ret = dcb_ieee_delapp(netdev, app); + if (ret) goto delapp_out; new_cfg = &pf->hw.port_info->desired_dcbx_cfg; @@ -882,8 +881,7 @@ ice_dcbnl_vsi_del_app(struct ice_vsi *vsi, sapp.protocol = app->prot_id; sapp.priority = app->priority; err = ice_dcbnl_delapp(vsi->netdev, &sapp); - dev_dbg(&vsi->back->pdev->dev, - "Deleting app for VSI idx=%d err=%d sel=%d proto=0x%x, prio=%d\n", + dev_dbg(ice_pf_to_dev(vsi->back), "Deleting app for VSI idx=%d err=%d sel=%d proto=0x%x, prio=%d\n", vsi->idx, err, app->selector, app->prot_id, app->priority); } diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.c b/drivers/net/ethernet/intel/ice/ice_ethtool.c index 90c6a3ca20c9..b002ab4e5838 100644 --- a/drivers/net/ethernet/intel/ice/ice_ethtool.c +++ b/drivers/net/ethernet/intel/ice/ice_ethtool.c @@ -166,13 +166,24 @@ static void ice_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo) { struct ice_netdev_priv *np = netdev_priv(netdev); + u8 oem_ver, oem_patch, nvm_ver_hi, nvm_ver_lo; struct ice_vsi *vsi = np->vsi; struct ice_pf *pf = vsi->back; + struct ice_hw *hw = &pf->hw; + u16 oem_build; strlcpy(drvinfo->driver, KBUILD_MODNAME, sizeof(drvinfo->driver)); strlcpy(drvinfo->version, ice_drv_ver, sizeof(drvinfo->version)); - strlcpy(drvinfo->fw_version, ice_nvm_version_str(&pf->hw), - sizeof(drvinfo->fw_version)); + + /* Display NVM version (from which the firmware version can be + * determined) which contains more pertinent information. + */ + ice_get_nvm_version(hw, &oem_ver, &oem_build, &oem_patch, + &nvm_ver_hi, &nvm_ver_lo); + snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), + "%x.%02x 0x%x %d.%d.%d", nvm_ver_hi, nvm_ver_lo, + hw->nvm.eetrack, oem_ver, oem_build, oem_patch); + strlcpy(drvinfo->bus_info, pci_name(pf->pdev), sizeof(drvinfo->bus_info)); drvinfo->n_priv_flags = ICE_PRIV_FLAG_ARRAY_SIZE; @@ -363,8 +374,7 @@ static int ice_reg_pattern_test(struct ice_hw *hw, u32 reg, u32 mask) val = rd32(hw, reg); if (val == pattern) continue; - dev_err(dev, - "%s: reg pattern test failed - reg 0x%08x pat 0x%08x val 0x%08x\n" + dev_err(dev, "%s: reg pattern test failed - reg 0x%08x pat 0x%08x val 0x%08x\n" , __func__, reg, pattern, val); return 1; } @@ -372,8 +382,7 @@ static int ice_reg_pattern_test(struct ice_hw *hw, u32 reg, u32 mask) wr32(hw, reg, orig_val); val = rd32(hw, reg); if (val != orig_val) { - dev_err(dev, - "%s: reg restore test failed - reg 0x%08x orig 0x%08x val 0x%08x\n" + dev_err(dev, "%s: reg restore test failed - reg 0x%08x orig 0x%08x val 0x%08x\n" , __func__, reg, orig_val, val); return 1; } @@ -791,8 +800,7 @@ ice_self_test(struct net_device *netdev, struct ethtool_test *eth_test, set_bit(__ICE_TESTING, pf->state); if (ice_active_vfs(pf)) { - dev_warn(dev, - "Please take active VFs and Netqueues offline and restart the adapter before running NIC diagnostics\n"); + dev_warn(dev, "Please take active VFs and Netqueues offline and restart the adapter before running NIC diagnostics\n"); data[ICE_ETH_TEST_REG] = 1; data[ICE_ETH_TEST_EEPROM] = 1; data[ICE_ETH_TEST_INTR] = 1; @@ -1047,7 +1055,7 @@ ice_set_fecparam(struct net_device *netdev, struct ethtool_fecparam *fecparam) fec = ICE_FEC_NONE; break; default: - dev_warn(&vsi->back->pdev->dev, "Unsupported FEC mode: %d\n", + dev_warn(ice_pf_to_dev(vsi->back), "Unsupported FEC mode: %d\n", fecparam->fec); return -EINVAL; } @@ -1200,8 +1208,7 @@ static int ice_set_priv_flags(struct net_device *netdev, u32 flags) * events to respond to. */ if (status) - dev_info(dev, - "Failed to unreg for LLDP events\n"); + dev_info(dev, "Failed to unreg for LLDP events\n"); /* The AQ call to stop the FW LLDP agent will generate * an error if the agent is already stopped. @@ -1256,8 +1263,7 @@ static int ice_set_priv_flags(struct net_device *netdev, u32 flags) /* Register for MIB change events */ status = ice_cfg_lldp_mib_change(&pf->hw, true); if (status) - dev_dbg(dev, - "Fail to enable MIB change events\n"); + dev_dbg(dev, "Fail to enable MIB change events\n"); } } if (test_bit(ICE_FLAG_LEGACY_RX, change_flags)) { @@ -1710,291 +1716,13 @@ ice_get_settings_link_up(struct ethtool_link_ksettings *ks, { struct ice_netdev_priv *np = netdev_priv(netdev); struct ice_port_info *pi = np->vsi->port_info; - struct ethtool_link_ksettings cap_ksettings; struct ice_link_status *link_info; struct ice_vsi *vsi = np->vsi; - bool unrecog_phy_high = false; - bool unrecog_phy_low = false; link_info = &vsi->port_info->phy.link_info; - /* Initialize supported and advertised settings based on PHY settings */ - switch (link_info->phy_type_low) { - case ICE_PHY_TYPE_LOW_100BASE_TX: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 100baseT_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 100baseT_Full); - break; - case ICE_PHY_TYPE_LOW_100M_SGMII: - ethtool_link_ksettings_add_link_mode(ks, supported, - 100baseT_Full); - break; - case ICE_PHY_TYPE_LOW_1000BASE_T: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 1000baseT_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 1000baseT_Full); - break; - case ICE_PHY_TYPE_LOW_1G_SGMII: - ethtool_link_ksettings_add_link_mode(ks, supported, - 1000baseT_Full); - break; - case ICE_PHY_TYPE_LOW_1000BASE_SX: - case ICE_PHY_TYPE_LOW_1000BASE_LX: - ethtool_link_ksettings_add_link_mode(ks, supported, - 1000baseX_Full); - break; - case ICE_PHY_TYPE_LOW_1000BASE_KX: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 1000baseKX_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 1000baseKX_Full); - break; - case ICE_PHY_TYPE_LOW_2500BASE_T: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 2500baseT_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 2500baseT_Full); - break; - case ICE_PHY_TYPE_LOW_2500BASE_X: - ethtool_link_ksettings_add_link_mode(ks, supported, - 2500baseX_Full); - break; - case ICE_PHY_TYPE_LOW_2500BASE_KX: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 2500baseX_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 2500baseX_Full); - break; - case ICE_PHY_TYPE_LOW_5GBASE_T: - case ICE_PHY_TYPE_LOW_5GBASE_KR: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 5000baseT_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 5000baseT_Full); - break; - case ICE_PHY_TYPE_LOW_10GBASE_T: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 10000baseT_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 10000baseT_Full); - break; - case ICE_PHY_TYPE_LOW_10G_SFI_DA: - case ICE_PHY_TYPE_LOW_10G_SFI_AOC_ACC: - case ICE_PHY_TYPE_LOW_10G_SFI_C2C: - ethtool_link_ksettings_add_link_mode(ks, supported, - 10000baseT_Full); - break; - case ICE_PHY_TYPE_LOW_10GBASE_SR: - ethtool_link_ksettings_add_link_mode(ks, supported, - 10000baseSR_Full); - break; - case ICE_PHY_TYPE_LOW_10GBASE_LR: - ethtool_link_ksettings_add_link_mode(ks, supported, - 10000baseLR_Full); - break; - case ICE_PHY_TYPE_LOW_10GBASE_KR_CR1: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 10000baseKR_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 10000baseKR_Full); - break; - case ICE_PHY_TYPE_LOW_25GBASE_T: - case ICE_PHY_TYPE_LOW_25GBASE_CR: - case ICE_PHY_TYPE_LOW_25GBASE_CR_S: - case ICE_PHY_TYPE_LOW_25GBASE_CR1: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 25000baseCR_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 25000baseCR_Full); - break; - case ICE_PHY_TYPE_LOW_25G_AUI_AOC_ACC: - case ICE_PHY_TYPE_LOW_25G_AUI_C2C: - ethtool_link_ksettings_add_link_mode(ks, supported, - 25000baseCR_Full); - break; - case ICE_PHY_TYPE_LOW_25GBASE_SR: - case ICE_PHY_TYPE_LOW_25GBASE_LR: - ethtool_link_ksettings_add_link_mode(ks, supported, - 25000baseSR_Full); - break; - case ICE_PHY_TYPE_LOW_25GBASE_KR: - case ICE_PHY_TYPE_LOW_25GBASE_KR1: - case ICE_PHY_TYPE_LOW_25GBASE_KR_S: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 25000baseKR_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 25000baseKR_Full); - break; - case ICE_PHY_TYPE_LOW_40GBASE_CR4: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 40000baseCR4_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 40000baseCR4_Full); - break; - case ICE_PHY_TYPE_LOW_40G_XLAUI_AOC_ACC: - case ICE_PHY_TYPE_LOW_40G_XLAUI: - ethtool_link_ksettings_add_link_mode(ks, supported, - 40000baseCR4_Full); - break; - case ICE_PHY_TYPE_LOW_40GBASE_SR4: - ethtool_link_ksettings_add_link_mode(ks, supported, - 40000baseSR4_Full); - break; - case ICE_PHY_TYPE_LOW_40GBASE_LR4: - ethtool_link_ksettings_add_link_mode(ks, supported, - 40000baseLR4_Full); - break; - case ICE_PHY_TYPE_LOW_40GBASE_KR4: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 40000baseKR4_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 40000baseKR4_Full); - break; - case ICE_PHY_TYPE_LOW_50GBASE_CR2: - case ICE_PHY_TYPE_LOW_50GBASE_CP: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 50000baseCR2_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 50000baseCR2_Full); - break; - case ICE_PHY_TYPE_LOW_50G_LAUI2_AOC_ACC: - case ICE_PHY_TYPE_LOW_50G_LAUI2: - case ICE_PHY_TYPE_LOW_50G_AUI2_AOC_ACC: - case ICE_PHY_TYPE_LOW_50G_AUI2: - case ICE_PHY_TYPE_LOW_50GBASE_SR: - case ICE_PHY_TYPE_LOW_50G_AUI1_AOC_ACC: - case ICE_PHY_TYPE_LOW_50G_AUI1: - ethtool_link_ksettings_add_link_mode(ks, supported, - 50000baseCR2_Full); - break; - case ICE_PHY_TYPE_LOW_50GBASE_KR2: - case ICE_PHY_TYPE_LOW_50GBASE_KR_PAM4: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 50000baseKR2_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 50000baseKR2_Full); - break; - case ICE_PHY_TYPE_LOW_50GBASE_SR2: - case ICE_PHY_TYPE_LOW_50GBASE_LR2: - case ICE_PHY_TYPE_LOW_50GBASE_FR: - case ICE_PHY_TYPE_LOW_50GBASE_LR: - ethtool_link_ksettings_add_link_mode(ks, supported, - 50000baseSR2_Full); - break; - case ICE_PHY_TYPE_LOW_100GBASE_CR4: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 100000baseCR4_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 100000baseCR4_Full); - break; - case ICE_PHY_TYPE_LOW_100G_CAUI4_AOC_ACC: - case ICE_PHY_TYPE_LOW_100G_CAUI4: - case ICE_PHY_TYPE_LOW_100G_AUI4_AOC_ACC: - case ICE_PHY_TYPE_LOW_100G_AUI4: - case ICE_PHY_TYPE_LOW_100GBASE_CR_PAM4: - ethtool_link_ksettings_add_link_mode(ks, supported, - 100000baseCR4_Full); - break; - case ICE_PHY_TYPE_LOW_100GBASE_CP2: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 100000baseCR4_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 100000baseCR4_Full); - break; - case ICE_PHY_TYPE_LOW_100GBASE_SR4: - case ICE_PHY_TYPE_LOW_100GBASE_SR2: - ethtool_link_ksettings_add_link_mode(ks, supported, - 100000baseSR4_Full); - break; - case ICE_PHY_TYPE_LOW_100GBASE_LR4: - case ICE_PHY_TYPE_LOW_100GBASE_DR: - ethtool_link_ksettings_add_link_mode(ks, supported, - 100000baseLR4_ER4_Full); - break; - case ICE_PHY_TYPE_LOW_100GBASE_KR4: - case ICE_PHY_TYPE_LOW_100GBASE_KR_PAM4: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 100000baseKR4_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 100000baseKR4_Full); - break; - default: - unrecog_phy_low = true; - } - - switch (link_info->phy_type_high) { - case ICE_PHY_TYPE_HIGH_100GBASE_KR2_PAM4: - ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, supported, - 100000baseKR4_Full); - ethtool_link_ksettings_add_link_mode(ks, advertising, Autoneg); - ethtool_link_ksettings_add_link_mode(ks, advertising, - 100000baseKR4_Full); - break; - case ICE_PHY_TYPE_HIGH_100G_CAUI2_AOC_ACC: - case ICE_PHY_TYPE_HIGH_100G_CAUI2: - case ICE_PHY_TYPE_HIGH_100G_AUI2_AOC_ACC: - case ICE_PHY_TYPE_HIGH_100G_AUI2: - ethtool_link_ksettings_add_link_mode(ks, supported, - 100000baseCR4_Full); - break; - default: - unrecog_phy_high = true; - } - - if (unrecog_phy_low && unrecog_phy_high) { - /* if we got here and link is up something bad is afoot */ - netdev_info(netdev, - "WARNING: Unrecognized PHY_Low (0x%llx).\n", - (u64)link_info->phy_type_low); - netdev_info(netdev, - "WARNING: Unrecognized PHY_High (0x%llx).\n", - (u64)link_info->phy_type_high); - } - - /* Now that we've worked out everything that could be supported by the - * current PHY type, get what is supported by the NVM and intersect - * them to get what is truly supported - */ - memset(&cap_ksettings, 0, sizeof(cap_ksettings)); - ice_phy_type_to_ethtool(netdev, &cap_ksettings); - ethtool_intersect_link_masks(ks, &cap_ksettings); + /* Get supported and advertised settings from PHY ability with media */ + ice_phy_type_to_ethtool(netdev, ks); switch (link_info->link_speed) { case ICE_AQ_LINK_SPEED_100GB: @@ -2028,8 +1756,7 @@ ice_get_settings_link_up(struct ethtool_link_ksettings *ks, ks->base.speed = SPEED_100; break; default: - netdev_info(netdev, - "WARNING: Unrecognized link_speed (0x%x).\n", + netdev_info(netdev, "WARNING: Unrecognized link_speed (0x%x).\n", link_info->link_speed); break; } @@ -2845,13 +2572,11 @@ ice_set_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring) new_tx_cnt = ALIGN(ring->tx_pending, ICE_REQ_DESC_MULTIPLE); if (new_tx_cnt != ring->tx_pending) - netdev_info(netdev, - "Requested Tx descriptor count rounded up to %d\n", + netdev_info(netdev, "Requested Tx descriptor count rounded up to %d\n", new_tx_cnt); new_rx_cnt = ALIGN(ring->rx_pending, ICE_REQ_DESC_MULTIPLE); if (new_rx_cnt != ring->rx_pending) - netdev_info(netdev, - "Requested Rx descriptor count rounded up to %d\n", + netdev_info(netdev, "Requested Rx descriptor count rounded up to %d\n", new_rx_cnt); /* if nothing to do return success */ @@ -3718,8 +3443,7 @@ ice_set_rc_coalesce(enum ice_container_type c_type, struct ethtool_coalesce *ec, if (ec->rx_coalesce_usecs_high > ICE_MAX_INTRL || (ec->rx_coalesce_usecs_high && ec->rx_coalesce_usecs_high < pf->hw.intrl_gran)) { - netdev_info(vsi->netdev, - "Invalid value, %s-usecs-high valid values are 0 (disabled), %d-%d\n", + netdev_info(vsi->netdev, "Invalid value, %s-usecs-high valid values are 0 (disabled), %d-%d\n", c_type_str, pf->hw.intrl_gran, ICE_MAX_INTRL); return -EINVAL; @@ -3737,8 +3461,7 @@ ice_set_rc_coalesce(enum ice_container_type c_type, struct ethtool_coalesce *ec, break; case ICE_TX_CONTAINER: if (ec->tx_coalesce_usecs_high) { - netdev_info(vsi->netdev, - "setting %s-usecs-high is not supported\n", + netdev_info(vsi->netdev, "setting %s-usecs-high is not supported\n", c_type_str); return -EINVAL; } @@ -3755,23 +3478,20 @@ ice_set_rc_coalesce(enum ice_container_type c_type, struct ethtool_coalesce *ec, itr_setting = rc->itr_setting & ~ICE_ITR_DYNAMIC; if (coalesce_usecs != itr_setting && use_adaptive_coalesce) { - netdev_info(vsi->netdev, - "%s interrupt throttling cannot be changed if adaptive-%s is enabled\n", + netdev_info(vsi->netdev, "%s interrupt throttling cannot be changed if adaptive-%s is enabled\n", c_type_str, c_type_str); return -EINVAL; } if (coalesce_usecs > ICE_ITR_MAX) { - netdev_info(vsi->netdev, - "Invalid value, %s-usecs range is 0-%d\n", + netdev_info(vsi->netdev, "Invalid value, %s-usecs range is 0-%d\n", c_type_str, ICE_ITR_MAX); return -EINVAL; } /* hardware only supports an ITR granularity of 2us */ if (coalesce_usecs % 2 != 0) { - netdev_info(vsi->netdev, - "Invalid value, %s-usecs must be even\n", + netdev_info(vsi->netdev, "Invalid value, %s-usecs must be even\n", c_type_str); return -EINVAL; } @@ -4012,8 +3732,7 @@ ice_get_module_info(struct net_device *netdev, } break; default: - netdev_warn(netdev, - "SFF Module Type not recognized.\n"); + netdev_warn(netdev, "SFF Module Type not recognized.\n"); return -EINVAL; } return 0; @@ -4081,11 +3800,11 @@ ice_get_module_eeprom(struct net_device *netdev, static const struct ethtool_ops ice_ethtool_ops = { .get_link_ksettings = ice_get_link_ksettings, .set_link_ksettings = ice_set_link_ksettings, - .get_drvinfo = ice_get_drvinfo, - .get_regs_len = ice_get_regs_len, - .get_regs = ice_get_regs, - .get_msglevel = ice_get_msglevel, - .set_msglevel = ice_set_msglevel, + .get_drvinfo = ice_get_drvinfo, + .get_regs_len = ice_get_regs_len, + .get_regs = ice_get_regs, + .get_msglevel = ice_get_msglevel, + .set_msglevel = ice_set_msglevel, .self_test = ice_self_test, .get_link = ethtool_op_get_link, .get_eeprom_len = ice_get_eeprom_len, @@ -4112,8 +3831,8 @@ static const struct ethtool_ops ice_ethtool_ops = { .get_channels = ice_get_channels, .set_channels = ice_set_channels, .get_ts_info = ethtool_op_get_ts_info, - .get_per_queue_coalesce = ice_get_per_q_coalesce, - .set_per_queue_coalesce = ice_set_per_q_coalesce, + .get_per_queue_coalesce = ice_get_per_q_coalesce, + .set_per_queue_coalesce = ice_set_per_q_coalesce, .get_fecparam = ice_get_fecparam, .set_fecparam = ice_set_fecparam, .get_module_info = ice_get_module_info, diff --git a/drivers/net/ethernet/intel/ice/ice_hw_autogen.h b/drivers/net/ethernet/intel/ice/ice_hw_autogen.h index f2cababf2561..6db3d0494127 100644 --- a/drivers/net/ethernet/intel/ice/ice_hw_autogen.h +++ b/drivers/net/ethernet/intel/ice/ice_hw_autogen.h @@ -267,8 +267,14 @@ #define GLNVM_GENS_SR_SIZE_S 5 #define GLNVM_GENS_SR_SIZE_M ICE_M(0x7, 5) #define GLNVM_ULD 0x000B6008 +#define GLNVM_ULD_PCIER_DONE_M BIT(0) +#define GLNVM_ULD_PCIER_DONE_1_M BIT(1) #define GLNVM_ULD_CORER_DONE_M BIT(3) #define GLNVM_ULD_GLOBR_DONE_M BIT(4) +#define GLNVM_ULD_POR_DONE_M BIT(5) +#define GLNVM_ULD_POR_DONE_1_M BIT(8) +#define GLNVM_ULD_PCIER_DONE_2_M BIT(9) +#define GLNVM_ULD_PE_DONE_M BIT(10) #define GLPCI_CNF2 0x000BE004 #define GLPCI_CNF2_CACHELINE_SIZE_M BIT(1) #define PF_FUNC_RID 0x0009E880 @@ -331,7 +337,6 @@ #define GLV_TEPC(_VSI) (0x00312000 + ((_VSI) * 4)) #define GLV_UPRCL(_i) (0x003B2000 + ((_i) * 8)) #define GLV_UPTCL(_i) (0x0030A000 + ((_i) * 8)) -#define PF_VT_PFALLOC_HIF 0x0009DD80 #define VSIQF_HKEY_MAX_INDEX 12 #define VSIQF_HLUT_MAX_INDEX 15 #define VFINT_DYN_CTLN(_i) (0x00003800 + ((_i) * 4)) diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c index 1874c9f51a32..d974e2fa3e63 100644 --- a/drivers/net/ethernet/intel/ice/ice_lib.c +++ b/drivers/net/ethernet/intel/ice/ice_lib.c @@ -117,8 +117,7 @@ static void ice_vsi_set_num_desc(struct ice_vsi *vsi) vsi->num_tx_desc = ICE_DFLT_NUM_TX_DESC; break; default: - dev_dbg(&vsi->back->pdev->dev, - "Not setting number of Tx/Rx descriptors for VSI type %d\n", + dev_dbg(ice_pf_to_dev(vsi->back), "Not setting number of Tx/Rx descriptors for VSI type %d\n", vsi->type); break; } @@ -724,7 +723,7 @@ static void ice_vsi_setup_q_map(struct ice_vsi *vsi, struct ice_vsi_ctx *ctxt) vsi->num_txq = tx_count; if (vsi->type == ICE_VSI_VF && vsi->num_txq != vsi->num_rxq) { - dev_dbg(&vsi->back->pdev->dev, "VF VSI should have same number of Tx and Rx queues. Hence making them equal\n"); + dev_dbg(ice_pf_to_dev(vsi->back), "VF VSI should have same number of Tx and Rx queues. Hence making them equal\n"); /* since there is a chance that num_rxq could have been changed * in the above for loop, make num_txq equal to num_rxq. */ @@ -929,8 +928,7 @@ static int ice_vsi_setup_vector_base(struct ice_vsi *vsi) vsi->base_vector = ice_get_res(pf, pf->irq_tracker, num_q_vectors, vsi->idx); if (vsi->base_vector < 0) { - dev_err(dev, - "Failed to get tracking for %d vectors for VSI %d, err=%d\n", + dev_err(dev, "Failed to get tracking for %d vectors for VSI %d, err=%d\n", num_q_vectors, vsi->vsi_num, vsi->base_vector); return -ENOENT; } @@ -1232,8 +1230,9 @@ static void ice_vsi_set_rss_flow_fld(struct ice_vsi *vsi) * * Returns 0 on success or ENOMEM on failure. */ -int ice_add_mac_to_list(struct ice_vsi *vsi, struct list_head *add_list, - const u8 *macaddr) +int +ice_add_mac_to_list(struct ice_vsi *vsi, struct list_head *add_list, + const u8 *macaddr) { struct ice_fltr_list_entry *tmp; struct ice_pf *pf = vsi->back; @@ -1392,12 +1391,10 @@ int ice_vsi_kill_vlan(struct ice_vsi *vsi, u16 vid) status = ice_remove_vlan(&pf->hw, &tmp_add_list); if (status == ICE_ERR_DOES_NOT_EXIST) { - dev_dbg(dev, - "Failed to remove VLAN %d on VSI %i, it does not exist, status: %d\n", + dev_dbg(dev, "Failed to remove VLAN %d on VSI %i, it does not exist, status: %d\n", vid, vsi->vsi_num, status); } else if (status) { - dev_err(dev, - "Error removing VLAN %d on vsi %i error: %d\n", + dev_err(dev, "Error removing VLAN %d on vsi %i error: %d\n", vid, vsi->vsi_num, status); err = -EIO; } @@ -1453,8 +1450,7 @@ setup_rings: err = ice_setup_rx_ctx(vsi->rx_rings[i]); if (err) { - dev_err(&vsi->back->pdev->dev, - "ice_setup_rx_ctx failed for RxQ %d, err %d\n", + dev_err(ice_pf_to_dev(vsi->back), "ice_setup_rx_ctx failed for RxQ %d, err %d\n", i, err); return err; } @@ -1623,7 +1619,7 @@ int ice_vsi_manage_vlan_insertion(struct ice_vsi *vsi) status = ice_update_vsi(hw, vsi->idx, ctxt, NULL); if (status) { - dev_err(&vsi->back->pdev->dev, "update VSI for VLAN insert failed, err %d aq_err %d\n", + dev_err(ice_pf_to_dev(vsi->back), "update VSI for VLAN insert failed, err %d aq_err %d\n", status, hw->adminq.sq_last_status); ret = -EIO; goto out; @@ -1669,7 +1665,7 @@ int ice_vsi_manage_vlan_stripping(struct ice_vsi *vsi, bool ena) status = ice_update_vsi(hw, vsi->idx, ctxt, NULL); if (status) { - dev_err(&vsi->back->pdev->dev, "update VSI for VLAN strip failed, ena = %d err %d aq_err %d\n", + dev_err(ice_pf_to_dev(vsi->back), "update VSI for VLAN strip failed, ena = %d err %d aq_err %d\n", ena, status, hw->adminq.sq_last_status); ret = -EIO; goto out; @@ -1834,8 +1830,7 @@ ice_vsi_set_q_vectors_reg_idx(struct ice_vsi *vsi) struct ice_q_vector *q_vector = vsi->q_vectors[i]; if (!q_vector) { - dev_err(&vsi->back->pdev->dev, - "Failed to set reg_idx on q_vector %d VSI %d\n", + dev_err(ice_pf_to_dev(vsi->back), "Failed to set reg_idx on q_vector %d VSI %d\n", i, vsi->vsi_num); goto clear_reg_idx; } @@ -1898,8 +1893,7 @@ ice_vsi_add_rem_eth_mac(struct ice_vsi *vsi, bool add_rule) status = ice_remove_eth_mac(&pf->hw, &tmp_add_list); if (status) - dev_err(dev, - "Failure Adding or Removing Ethertype on VSI %i error: %d\n", + dev_err(dev, "Failure Adding or Removing Ethertype on VSI %i error: %d\n", vsi->vsi_num, status); ice_free_fltr_list(dev, &tmp_add_list); @@ -2384,8 +2378,7 @@ ice_get_res(struct ice_pf *pf, struct ice_res_tracker *res, u16 needed, u16 id) return -EINVAL; if (!needed || needed > res->num_entries || id >= ICE_RES_VALID_BIT) { - dev_err(ice_pf_to_dev(pf), - "param err: needed=%d, num_entries = %d id=0x%04x\n", + dev_err(ice_pf_to_dev(pf), "param err: needed=%d, num_entries = %d id=0x%04x\n", needed, res->num_entries, id); return -EINVAL; } @@ -2686,7 +2679,6 @@ int ice_vsi_rebuild(struct ice_vsi *vsi, bool init_vsi) ice_vsi_put_qs(vsi); ice_vsi_clear_rings(vsi); ice_vsi_free_arrays(vsi); - ice_dev_onetime_setup(&pf->hw); if (vsi->type == ICE_VSI_VF) ice_vsi_set_num_qs(vsi, vf->vf_id); else @@ -2765,8 +2757,7 @@ int ice_vsi_rebuild(struct ice_vsi *vsi, bool init_vsi) status = ice_cfg_vsi_lan(vsi->port_info, vsi->idx, vsi->tc_cfg.ena_tc, max_txqs); if (status) { - dev_err(ice_pf_to_dev(pf), - "VSI %d failed lan queue config, error %d\n", + dev_err(ice_pf_to_dev(pf), "VSI %d failed lan queue config, error %d\n", vsi->vsi_num, status); if (init_vsi) { ret = -EIO; @@ -2834,8 +2825,8 @@ static void ice_vsi_update_q_map(struct ice_vsi *vsi, struct ice_vsi_ctx *ctx) int ice_vsi_cfg_tc(struct ice_vsi *vsi, u8 ena_tc) { u16 max_txqs[ICE_MAX_TRAFFIC_CLASS] = { 0 }; - struct ice_vsi_ctx *ctx; struct ice_pf *pf = vsi->back; + struct ice_vsi_ctx *ctx; enum ice_status status; struct device *dev; int i, ret = 0; @@ -2892,25 +2883,6 @@ out: #endif /* CONFIG_DCB */ /** - * ice_nvm_version_str - format the NVM version strings - * @hw: ptr to the hardware info - */ -char *ice_nvm_version_str(struct ice_hw *hw) -{ - u8 oem_ver, oem_patch, ver_hi, ver_lo; - static char buf[ICE_NVM_VER_LEN]; - u16 oem_build; - - ice_get_nvm_version(hw, &oem_ver, &oem_build, &oem_patch, &ver_hi, - &ver_lo); - - snprintf(buf, sizeof(buf), "%x.%02x 0x%x %d.%d.%d", ver_hi, ver_lo, - hw->nvm.eetrack, oem_ver, oem_build, oem_patch); - - return buf; -} - -/** * ice_update_ring_stats - Update ring statistics * @ring: ring to update * @cont: used to increment per-vector counters @@ -2981,7 +2953,7 @@ ice_vsi_cfg_mac_fltr(struct ice_vsi *vsi, const u8 *macaddr, bool set) status = ice_remove_mac(&vsi->back->hw, &tmp_add_list); cfg_mac_fltr_exit: - ice_free_fltr_list(&vsi->back->pdev->dev, &tmp_add_list); + ice_free_fltr_list(ice_pf_to_dev(vsi->back), &tmp_add_list); return status; } @@ -3043,16 +3015,14 @@ int ice_set_dflt_vsi(struct ice_sw *sw, struct ice_vsi *vsi) /* another VSI is already the default VSI for this switch */ if (ice_is_dflt_vsi_in_use(sw)) { - dev_err(dev, - "Default forwarding VSI %d already in use, disable it and try again\n", + dev_err(dev, "Default forwarding VSI %d already in use, disable it and try again\n", sw->dflt_vsi->vsi_num); return -EEXIST; } status = ice_cfg_dflt_vsi(&vsi->back->hw, vsi->idx, true, ICE_FLTR_RX); if (status) { - dev_err(dev, - "Failed to set VSI %d as the default forwarding VSI, error %d\n", + dev_err(dev, "Failed to set VSI %d as the default forwarding VSI, error %d\n", vsi->vsi_num, status); return -EIO; } @@ -3091,8 +3061,7 @@ int ice_clear_dflt_vsi(struct ice_sw *sw) status = ice_cfg_dflt_vsi(&dflt_vsi->back->hw, dflt_vsi->idx, false, ICE_FLTR_RX); if (status) { - dev_err(dev, - "Failed to clear the default forwarding VSI %d, error %d\n", + dev_err(dev, "Failed to clear the default forwarding VSI %d, error %d\n", dflt_vsi->vsi_num, status); return -EIO; } diff --git a/drivers/net/ethernet/intel/ice/ice_lib.h b/drivers/net/ethernet/intel/ice/ice_lib.h index 68fd0d4505c2..e2c0dadce920 100644 --- a/drivers/net/ethernet/intel/ice/ice_lib.h +++ b/drivers/net/ethernet/intel/ice/ice_lib.h @@ -97,8 +97,6 @@ void ice_vsi_cfg_frame_size(struct ice_vsi *vsi); u32 ice_intrl_usec_to_reg(u8 intrl, u8 gran); -char *ice_nvm_version_str(struct ice_hw *hw); - enum ice_status ice_vsi_cfg_mac_fltr(struct ice_vsi *vsi, const u8 *macaddr, bool set); diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c index 5ae671609f98..5ef28052c0f8 100644 --- a/drivers/net/ethernet/intel/ice/ice_main.c +++ b/drivers/net/ethernet/intel/ice/ice_main.c @@ -162,8 +162,7 @@ unregister: * had an error */ if (status && vsi->netdev->reg_state == NETREG_REGISTERED) { - dev_err(ice_pf_to_dev(pf), - "Could not add MAC filters error %d. Unregistering device\n", + dev_err(ice_pf_to_dev(pf), "Could not add MAC filters error %d. Unregistering device\n", status); unregister_netdev(vsi->netdev); free_netdev(vsi->netdev); @@ -269,7 +268,7 @@ static int ice_cfg_promisc(struct ice_vsi *vsi, u8 promisc_m, bool set_promisc) */ static int ice_vsi_sync_fltr(struct ice_vsi *vsi) { - struct device *dev = &vsi->back->pdev->dev; + struct device *dev = ice_pf_to_dev(vsi->back); struct net_device *netdev = vsi->netdev; bool promisc_forced_on = false; struct ice_pf *pf = vsi->back; @@ -335,8 +334,7 @@ static int ice_vsi_sync_fltr(struct ice_vsi *vsi) !test_and_set_bit(__ICE_FLTR_OVERFLOW_PROMISC, vsi->state)) { promisc_forced_on = true; - netdev_warn(netdev, - "Reached MAC filter limit, forcing promisc mode on VSI %d\n", + netdev_warn(netdev, "Reached MAC filter limit, forcing promisc mode on VSI %d\n", vsi->vsi_num); } else { err = -EIO; @@ -382,8 +380,7 @@ static int ice_vsi_sync_fltr(struct ice_vsi *vsi) if (!ice_is_dflt_vsi_in_use(pf->first_sw)) { err = ice_set_dflt_vsi(pf->first_sw, vsi); if (err && err != -EEXIST) { - netdev_err(netdev, - "Error %d setting default VSI %i Rx rule\n", + netdev_err(netdev, "Error %d setting default VSI %i Rx rule\n", err, vsi->vsi_num); vsi->current_netdev_flags &= ~IFF_PROMISC; @@ -395,8 +392,7 @@ static int ice_vsi_sync_fltr(struct ice_vsi *vsi) if (ice_is_vsi_dflt_vsi(pf->first_sw, vsi)) { err = ice_clear_dflt_vsi(pf->first_sw); if (err) { - netdev_err(netdev, - "Error %d clearing default VSI %i Rx rule\n", + netdev_err(netdev, "Error %d clearing default VSI %i Rx rule\n", err, vsi->vsi_num); vsi->current_netdev_flags |= IFF_PROMISC; @@ -752,7 +748,7 @@ void ice_print_link_msg(struct ice_vsi *vsi, bool isup) kfree(caps); done: - netdev_info(vsi->netdev, "NIC Link is up %sbps, Requested FEC: %s, FEC: %s, Autoneg: %s, Flow Control: %s\n", + netdev_info(vsi->netdev, "NIC Link is up %sbps Full Duplex, Requested FEC: %s, Negotiated FEC: %s, Autoneg: %s, Flow Control: %s\n", speed, fec_req, fec, an, fc); ice_print_topo_conflict(vsi); } @@ -815,8 +811,7 @@ ice_link_event(struct ice_pf *pf, struct ice_port_info *pi, bool link_up, */ result = ice_update_link_info(pi); if (result) - dev_dbg(dev, - "Failed to update link status and re-enable link events for port %d\n", + dev_dbg(dev, "Failed to update link status and re-enable link events for port %d\n", pi->lport); /* if the old link up/down and speed is the same as the new */ @@ -834,13 +829,13 @@ ice_link_event(struct ice_pf *pf, struct ice_port_info *pi, bool link_up, result = ice_aq_set_link_restart_an(pi, false, NULL); if (result) { - dev_dbg(dev, - "Failed to set link down, VSI %d error %d\n", + dev_dbg(dev, "Failed to set link down, VSI %d error %d\n", vsi->vsi_num, result); return result; } } + ice_dcb_rebuild(pf); ice_vsi_link_event(vsi, link_up); ice_print_link_msg(vsi, link_up); @@ -892,15 +887,13 @@ static int ice_init_link_events(struct ice_port_info *pi) ICE_AQ_LINK_EVENT_MODULE_QUAL_FAIL)); if (ice_aq_set_event_mask(pi->hw, pi->lport, mask, NULL)) { - dev_dbg(ice_hw_to_dev(pi->hw), - "Failed to set link event mask for port %d\n", + dev_dbg(ice_hw_to_dev(pi->hw), "Failed to set link event mask for port %d\n", pi->lport); return -EIO; } if (ice_aq_get_link_info(pi, true, NULL, NULL)) { - dev_dbg(ice_hw_to_dev(pi->hw), - "Failed to enable link events for port %d\n", + dev_dbg(ice_hw_to_dev(pi->hw), "Failed to enable link events for port %d\n", pi->lport); return -EIO; } @@ -929,8 +922,8 @@ ice_handle_link_event(struct ice_pf *pf, struct ice_rq_event_info *event) !!(link_data->link_info & ICE_AQ_LINK_UP), le16_to_cpu(link_data->link_speed)); if (status) - dev_dbg(ice_pf_to_dev(pf), - "Could not process link event, error %d\n", status); + dev_dbg(ice_pf_to_dev(pf), "Could not process link event, error %d\n", + status); return status; } @@ -979,13 +972,11 @@ static int __ice_clean_ctrlq(struct ice_pf *pf, enum ice_ctl_q q_type) dev_dbg(dev, "%s Receive Queue VF Error detected\n", qtype); if (val & PF_FW_ARQLEN_ARQOVFL_M) { - dev_dbg(dev, - "%s Receive Queue Overflow Error detected\n", + dev_dbg(dev, "%s Receive Queue Overflow Error detected\n", qtype); } if (val & PF_FW_ARQLEN_ARQCRIT_M) - dev_dbg(dev, - "%s Receive Queue Critical Error detected\n", + dev_dbg(dev, "%s Receive Queue Critical Error detected\n", qtype); val &= ~(PF_FW_ARQLEN_ARQVFE_M | PF_FW_ARQLEN_ARQOVFL_M | PF_FW_ARQLEN_ARQCRIT_M); @@ -998,8 +989,8 @@ static int __ice_clean_ctrlq(struct ice_pf *pf, enum ice_ctl_q q_type) PF_FW_ATQLEN_ATQCRIT_M)) { oldval = val; if (val & PF_FW_ATQLEN_ATQVFE_M) - dev_dbg(dev, - "%s Send Queue VF Error detected\n", qtype); + dev_dbg(dev, "%s Send Queue VF Error detected\n", + qtype); if (val & PF_FW_ATQLEN_ATQOVFL_M) { dev_dbg(dev, "%s Send Queue Overflow Error detected\n", qtype); @@ -1048,8 +1039,7 @@ static int __ice_clean_ctrlq(struct ice_pf *pf, enum ice_ctl_q q_type) ice_dcb_process_lldp_set_mib_change(pf, &event); break; default: - dev_dbg(dev, - "%s Receive Queue unknown event 0x%04x ignored\n", + dev_dbg(dev, "%s Receive Queue unknown event 0x%04x ignored\n", qtype, opcode); break; } @@ -1238,7 +1228,7 @@ static void ice_handle_mdd_event(struct ice_pf *pf) u16 queue = ((reg & GL_MDET_TX_TCLAN_QNUM_M) >> GL_MDET_TX_TCLAN_QNUM_S); - if (netif_msg_rx_err(pf)) + if (netif_msg_tx_err(pf)) dev_info(dev, "Malicious Driver Detection event %d on TX queue %d PF# %d VF# %d\n", event, queue, pf_num, vf_num); wr32(hw, GL_MDET_TX_TCLAN, 0xffffffff); @@ -1335,8 +1325,7 @@ static void ice_handle_mdd_event(struct ice_pf *pf) vf->num_mdd_events++; if (vf->num_mdd_events && vf->num_mdd_events <= ICE_MDD_EVENTS_THRESHOLD) - dev_info(dev, - "VF %d has had %llu MDD events since last boot, Admin might need to reload AVF driver with this number of events\n", + dev_info(dev, "VF %d has had %llu MDD events since last boot, Admin might need to reload AVF driver with this number of events\n", i, vf->num_mdd_events); } } @@ -1367,7 +1356,7 @@ static int ice_force_phys_link_state(struct ice_vsi *vsi, bool link_up) if (vsi->type != ICE_VSI_PF) return 0; - dev = &vsi->back->pdev->dev; + dev = ice_pf_to_dev(vsi->back); pi = vsi->port_info; @@ -1378,8 +1367,7 @@ static int ice_force_phys_link_state(struct ice_vsi *vsi, bool link_up) retcode = ice_aq_get_phy_caps(pi, false, ICE_AQC_REPORT_SW_CFG, pcaps, NULL); if (retcode) { - dev_err(dev, - "Failed to get phy capabilities, VSI %d error %d\n", + dev_err(dev, "Failed to get phy capabilities, VSI %d error %d\n", vsi->vsi_num, retcode); retcode = -EIO; goto out; @@ -1649,8 +1637,8 @@ static int ice_vsi_req_irq_msix(struct ice_vsi *vsi, char *basename) err = devm_request_irq(dev, irq_num, vsi->irq_handler, 0, q_vector->name, q_vector); if (err) { - netdev_err(vsi->netdev, - "MSIX request_irq failed, error: %d\n", err); + netdev_err(vsi->netdev, "MSIX request_irq failed, error: %d\n", + err); goto free_q_irqs; } @@ -1685,7 +1673,7 @@ free_q_irqs: */ static int ice_xdp_alloc_setup_rings(struct ice_vsi *vsi) { - struct device *dev = &vsi->back->pdev->dev; + struct device *dev = ice_pf_to_dev(vsi->back); int i; for (i = 0; i < vsi->num_xdp_txq; i++) { @@ -2664,14 +2652,12 @@ static void ice_set_pf_caps(struct ice_pf *pf) clear_bit(ICE_FLAG_DCB_CAPABLE, pf->flags); if (func_caps->common_cap.dcb) set_bit(ICE_FLAG_DCB_CAPABLE, pf->flags); -#ifdef CONFIG_PCI_IOV clear_bit(ICE_FLAG_SRIOV_CAPABLE, pf->flags); if (func_caps->common_cap.sr_iov_1_1) { set_bit(ICE_FLAG_SRIOV_CAPABLE, pf->flags); pf->num_vfs_supported = min_t(int, func_caps->num_allocd_vfs, ICE_MAX_VF_COUNT); } -#endif /* CONFIG_PCI_IOV */ clear_bit(ICE_FLAG_RSS_ENA, pf->flags); if (func_caps->common_cap.rss_table_size) set_bit(ICE_FLAG_RSS_ENA, pf->flags); @@ -2764,8 +2750,7 @@ static int ice_ena_msix_range(struct ice_pf *pf) } if (v_actual < v_budget) { - dev_warn(dev, - "not enough OS MSI-X vectors. requested = %d, obtained = %d\n", + dev_warn(dev, "not enough OS MSI-X vectors. requested = %d, obtained = %d\n", v_budget, v_actual); /* 2 vectors for LAN (traffic + OICR) */ #define ICE_MIN_LAN_VECS 2 @@ -2787,8 +2772,7 @@ msix_err: goto exit_err; no_hw_vecs_left_err: - dev_err(dev, - "not enough device MSI-X vectors. requested = %d, available = %d\n", + dev_err(dev, "not enough device MSI-X vectors. requested = %d, available = %d\n", needed, v_left); err = -ERANGE; exit_err: @@ -2921,16 +2905,14 @@ ice_log_pkg_init(struct ice_hw *hw, enum ice_status *status) !memcmp(hw->pkg_name, hw->active_pkg_name, sizeof(hw->pkg_name))) { if (hw->pkg_dwnld_status == ICE_AQ_RC_EEXIST) - dev_info(dev, - "DDP package already present on device: %s version %d.%d.%d.%d\n", + dev_info(dev, "DDP package already present on device: %s version %d.%d.%d.%d\n", hw->active_pkg_name, hw->active_pkg_ver.major, hw->active_pkg_ver.minor, hw->active_pkg_ver.update, hw->active_pkg_ver.draft); else - dev_info(dev, - "The DDP package was successfully loaded: %s version %d.%d.%d.%d\n", + dev_info(dev, "The DDP package was successfully loaded: %s version %d.%d.%d.%d\n", hw->active_pkg_name, hw->active_pkg_ver.major, hw->active_pkg_ver.minor, @@ -2938,8 +2920,7 @@ ice_log_pkg_init(struct ice_hw *hw, enum ice_status *status) hw->active_pkg_ver.draft); } else if (hw->active_pkg_ver.major != ICE_PKG_SUPP_VER_MAJ || hw->active_pkg_ver.minor != ICE_PKG_SUPP_VER_MNR) { - dev_err(dev, - "The device has a DDP package that is not supported by the driver. The device has package '%s' version %d.%d.x.x. The driver requires version %d.%d.x.x. Entering Safe Mode.\n", + dev_err(dev, "The device has a DDP package that is not supported by the driver. The device has package '%s' version %d.%d.x.x. The driver requires version %d.%d.x.x. Entering Safe Mode.\n", hw->active_pkg_name, hw->active_pkg_ver.major, hw->active_pkg_ver.minor, @@ -2947,8 +2928,7 @@ ice_log_pkg_init(struct ice_hw *hw, enum ice_status *status) *status = ICE_ERR_NOT_SUPPORTED; } else if (hw->active_pkg_ver.major == ICE_PKG_SUPP_VER_MAJ && hw->active_pkg_ver.minor == ICE_PKG_SUPP_VER_MNR) { - dev_info(dev, - "The driver could not load the DDP package file because a compatible DDP package is already present on the device. The device has package '%s' version %d.%d.%d.%d. The package file found by the driver: '%s' version %d.%d.%d.%d.\n", + dev_info(dev, "The driver could not load the DDP package file because a compatible DDP package is already present on the device. The device has package '%s' version %d.%d.%d.%d. The package file found by the driver: '%s' version %d.%d.%d.%d.\n", hw->active_pkg_name, hw->active_pkg_ver.major, hw->active_pkg_ver.minor, @@ -2960,54 +2940,46 @@ ice_log_pkg_init(struct ice_hw *hw, enum ice_status *status) hw->pkg_ver.update, hw->pkg_ver.draft); } else { - dev_err(dev, - "An unknown error occurred when loading the DDP package, please reboot the system. If the problem persists, update the NVM. Entering Safe Mode.\n"); + dev_err(dev, "An unknown error occurred when loading the DDP package, please reboot the system. If the problem persists, update the NVM. Entering Safe Mode.\n"); *status = ICE_ERR_NOT_SUPPORTED; } break; case ICE_ERR_BUF_TOO_SHORT: /* fall-through */ case ICE_ERR_CFG: - dev_err(dev, - "The DDP package file is invalid. Entering Safe Mode.\n"); + dev_err(dev, "The DDP package file is invalid. Entering Safe Mode.\n"); break; case ICE_ERR_NOT_SUPPORTED: /* Package File version not supported */ if (hw->pkg_ver.major > ICE_PKG_SUPP_VER_MAJ || (hw->pkg_ver.major == ICE_PKG_SUPP_VER_MAJ && hw->pkg_ver.minor > ICE_PKG_SUPP_VER_MNR)) - dev_err(dev, - "The DDP package file version is higher than the driver supports. Please use an updated driver. Entering Safe Mode.\n"); + dev_err(dev, "The DDP package file version is higher than the driver supports. Please use an updated driver. Entering Safe Mode.\n"); else if (hw->pkg_ver.major < ICE_PKG_SUPP_VER_MAJ || (hw->pkg_ver.major == ICE_PKG_SUPP_VER_MAJ && hw->pkg_ver.minor < ICE_PKG_SUPP_VER_MNR)) - dev_err(dev, - "The DDP package file version is lower than the driver supports. The driver requires version %d.%d.x.x. Please use an updated DDP Package file. Entering Safe Mode.\n", + dev_err(dev, "The DDP package file version is lower than the driver supports. The driver requires version %d.%d.x.x. Please use an updated DDP Package file. Entering Safe Mode.\n", ICE_PKG_SUPP_VER_MAJ, ICE_PKG_SUPP_VER_MNR); break; case ICE_ERR_AQ_ERROR: switch (hw->pkg_dwnld_status) { case ICE_AQ_RC_ENOSEC: case ICE_AQ_RC_EBADSIG: - dev_err(dev, - "The DDP package could not be loaded because its signature is not valid. Please use a valid DDP Package. Entering Safe Mode.\n"); + dev_err(dev, "The DDP package could not be loaded because its signature is not valid. Please use a valid DDP Package. Entering Safe Mode.\n"); return; case ICE_AQ_RC_ESVN: - dev_err(dev, - "The DDP Package could not be loaded because its security revision is too low. Please use an updated DDP Package. Entering Safe Mode.\n"); + dev_err(dev, "The DDP Package could not be loaded because its security revision is too low. Please use an updated DDP Package. Entering Safe Mode.\n"); return; case ICE_AQ_RC_EBADMAN: case ICE_AQ_RC_EBADBUF: - dev_err(dev, - "An error occurred on the device while loading the DDP package. The device will be reset.\n"); + dev_err(dev, "An error occurred on the device while loading the DDP package. The device will be reset.\n"); return; default: break; } /* fall-through */ default: - dev_err(dev, - "An unknown error (%d) occurred when loading the DDP package. Entering Safe Mode.\n", + dev_err(dev, "An unknown error (%d) occurred when loading the DDP package. Entering Safe Mode.\n", *status); break; } @@ -3038,8 +3010,7 @@ ice_load_pkg(const struct firmware *firmware, struct ice_pf *pf) status = ice_init_pkg(hw, hw->pkg_copy, hw->pkg_size); ice_log_pkg_init(hw, &status); } else { - dev_err(dev, - "The DDP package file failed to load. Entering Safe Mode.\n"); + dev_err(dev, "The DDP package file failed to load. Entering Safe Mode.\n"); } if (status) { @@ -3065,8 +3036,7 @@ ice_load_pkg(const struct firmware *firmware, struct ice_pf *pf) static void ice_verify_cacheline_size(struct ice_pf *pf) { if (rd32(&pf->hw, GLPCI_CNF2) & GLPCI_CNF2_CACHELINE_SIZE_M) - dev_warn(ice_pf_to_dev(pf), - "%d Byte cache line assumption is invalid, driver may have Tx timeouts!\n", + dev_warn(ice_pf_to_dev(pf), "%d Byte cache line assumption is invalid, driver may have Tx timeouts!\n", ICE_CACHE_LINE_BYTES); } @@ -3159,8 +3129,7 @@ static void ice_request_fw(struct ice_pf *pf) dflt_pkg_load: err = request_firmware(&firmware, ICE_DDP_PKG_FILE, dev); if (err) { - dev_err(dev, - "The DDP package file was not found or could not be read. Entering Safe Mode\n"); + dev_err(dev, "The DDP package file was not found or could not be read. Entering Safe Mode\n"); return; } @@ -3184,7 +3153,9 @@ ice_probe(struct pci_dev *pdev, const struct pci_device_id __always_unused *ent) struct ice_hw *hw; int err; - /* this driver uses devres, see Documentation/driver-api/driver-model/devres.rst */ + /* this driver uses devres, see + * Documentation/driver-api/driver-model/devres.rst + */ err = pcim_enable_device(pdev); if (err) return err; @@ -3245,11 +3216,6 @@ ice_probe(struct pci_dev *pdev, const struct pci_device_id __always_unused *ent) goto err_exit_unroll; } - dev_info(dev, "firmware %d.%d.%d api %d.%d.%d nvm %s build 0x%08x\n", - hw->fw_maj_ver, hw->fw_min_ver, hw->fw_patch, - hw->api_maj_ver, hw->api_min_ver, hw->api_patch, - ice_nvm_version_str(hw), hw->fw_build); - ice_request_fw(pf); /* if ice_request_fw fails, ICE_FLAG_ADV_FEATURES bit won't be @@ -3257,8 +3223,7 @@ ice_probe(struct pci_dev *pdev, const struct pci_device_id __always_unused *ent) * true */ if (ice_is_safe_mode(pf)) { - dev_err(dev, - "Package download failed. Advanced features disabled - Device now in Safe Mode\n"); + dev_err(dev, "Package download failed. Advanced features disabled - Device now in Safe Mode\n"); /* we already got function/device capabilities but these don't * reflect what the driver needs to do in safe mode. Instead of * adding conditional logic everywhere to ignore these @@ -3335,8 +3300,7 @@ ice_probe(struct pci_dev *pdev, const struct pci_device_id __always_unused *ent) /* tell the firmware we are up */ err = ice_send_version(pf); if (err) { - dev_err(dev, - "probe failed sending driver version %s. error: %d\n", + dev_err(dev, "probe failed sending driver version %s. error: %d\n", ice_drv_ver, err); goto err_alloc_sw_unroll; } @@ -3477,8 +3441,7 @@ static pci_ers_result_t ice_pci_err_slot_reset(struct pci_dev *pdev) err = pci_enable_device_mem(pdev); if (err) { - dev_err(&pdev->dev, - "Cannot re-enable PCI device after reset, error %d\n", + dev_err(&pdev->dev, "Cannot re-enable PCI device after reset, error %d\n", err); result = PCI_ERS_RESULT_DISCONNECT; } else { @@ -3497,8 +3460,7 @@ static pci_ers_result_t ice_pci_err_slot_reset(struct pci_dev *pdev) err = pci_cleanup_aer_uncorrect_error_status(pdev); if (err) - dev_dbg(&pdev->dev, - "pci_cleanup_aer_uncorrect_error_status failed, error %d\n", + dev_dbg(&pdev->dev, "pci_cleanup_aer_uncorrect_error_status failed, error %d\n", err); /* non-fatal, continue */ @@ -3517,8 +3479,8 @@ static void ice_pci_err_resume(struct pci_dev *pdev) struct ice_pf *pf = pci_get_drvdata(pdev); if (!pf) { - dev_err(&pdev->dev, - "%s failed, device is unrecoverable\n", __func__); + dev_err(&pdev->dev, "%s failed, device is unrecoverable\n", + __func__); return; } @@ -3766,8 +3728,7 @@ ice_set_tx_maxrate(struct net_device *netdev, int queue_index, u32 maxrate) /* Validate maxrate requested is within permitted range */ if (maxrate && (maxrate > (ICE_SCHED_MAX_BW / 1000))) { - netdev_err(netdev, - "Invalid max rate %d specified for the queue %d\n", + netdev_err(netdev, "Invalid max rate %d specified for the queue %d\n", maxrate, queue_index); return -EINVAL; } @@ -3783,8 +3744,8 @@ ice_set_tx_maxrate(struct net_device *netdev, int queue_index, u32 maxrate) status = ice_cfg_q_bw_lmt(vsi->port_info, vsi->idx, tc, q_handle, ICE_MAX_BW, maxrate * 1000); if (status) { - netdev_err(netdev, - "Unable to set Tx max rate, error %d\n", status); + netdev_err(netdev, "Unable to set Tx max rate, error %d\n", + status); return -EIO; } @@ -3876,15 +3837,13 @@ ice_set_features(struct net_device *netdev, netdev_features_t features) /* Don't set any netdev advanced features with device in Safe Mode */ if (ice_is_safe_mode(vsi->back)) { - dev_err(&vsi->back->pdev->dev, - "Device is in Safe Mode - not enabling advanced netdev features\n"); + dev_err(ice_pf_to_dev(vsi->back), "Device is in Safe Mode - not enabling advanced netdev features\n"); return ret; } /* Do not change setting during reset */ if (ice_is_reset_in_progress(pf->state)) { - dev_err(&vsi->back->pdev->dev, - "Device is resetting, changing advanced netdev features temporarily unavailable.\n"); + dev_err(ice_pf_to_dev(vsi->back), "Device is resetting, changing advanced netdev features temporarily unavailable.\n"); return -EBUSY; } @@ -4372,21 +4331,18 @@ int ice_down(struct ice_vsi *vsi) tx_err = ice_vsi_stop_lan_tx_rings(vsi, ICE_NO_RESET, 0); if (tx_err) - netdev_err(vsi->netdev, - "Failed stop Tx rings, VSI %d error %d\n", + netdev_err(vsi->netdev, "Failed stop Tx rings, VSI %d error %d\n", vsi->vsi_num, tx_err); if (!tx_err && ice_is_xdp_ena_vsi(vsi)) { tx_err = ice_vsi_stop_xdp_tx_rings(vsi); if (tx_err) - netdev_err(vsi->netdev, - "Failed stop XDP rings, VSI %d error %d\n", + netdev_err(vsi->netdev, "Failed stop XDP rings, VSI %d error %d\n", vsi->vsi_num, tx_err); } rx_err = ice_vsi_stop_rx_rings(vsi); if (rx_err) - netdev_err(vsi->netdev, - "Failed stop Rx rings, VSI %d error %d\n", + netdev_err(vsi->netdev, "Failed stop Rx rings, VSI %d error %d\n", vsi->vsi_num, rx_err); ice_napi_disable_all(vsi); @@ -4394,8 +4350,7 @@ int ice_down(struct ice_vsi *vsi) if (test_bit(ICE_FLAG_LINK_DOWN_ON_CLOSE_ENA, vsi->back->flags)) { link_err = ice_force_phys_link_state(vsi, false); if (link_err) - netdev_err(vsi->netdev, - "Failed to set physical link down, VSI %d error %d\n", + netdev_err(vsi->netdev, "Failed to set physical link down, VSI %d error %d\n", vsi->vsi_num, link_err); } @@ -4406,8 +4361,7 @@ int ice_down(struct ice_vsi *vsi) ice_clean_rx_ring(vsi->rx_rings[i]); if (tx_err || rx_err || link_err) { - netdev_err(vsi->netdev, - "Failed to close VSI 0x%04X on switch 0x%04X\n", + netdev_err(vsi->netdev, "Failed to close VSI 0x%04X on switch 0x%04X\n", vsi->vsi_num, vsi->vsw->sw_id); return -EIO; } @@ -4426,7 +4380,7 @@ int ice_vsi_setup_tx_rings(struct ice_vsi *vsi) int i, err = 0; if (!vsi->num_txq) { - dev_err(&vsi->back->pdev->dev, "VSI %d has 0 Tx queues\n", + dev_err(ice_pf_to_dev(vsi->back), "VSI %d has 0 Tx queues\n", vsi->vsi_num); return -EINVAL; } @@ -4457,7 +4411,7 @@ int ice_vsi_setup_rx_rings(struct ice_vsi *vsi) int i, err = 0; if (!vsi->num_rxq) { - dev_err(&vsi->back->pdev->dev, "VSI %d has 0 Rx queues\n", + dev_err(ice_pf_to_dev(vsi->back), "VSI %d has 0 Rx queues\n", vsi->vsi_num); return -EINVAL; } @@ -4554,8 +4508,7 @@ static void ice_vsi_release_all(struct ice_pf *pf) err = ice_vsi_release(pf->vsi[i]); if (err) - dev_dbg(ice_pf_to_dev(pf), - "Failed to release pf->vsi[%d], err %d, vsi_num = %d\n", + dev_dbg(ice_pf_to_dev(pf), "Failed to release pf->vsi[%d], err %d, vsi_num = %d\n", i, err, pf->vsi[i]->vsi_num); } } @@ -4582,8 +4535,7 @@ static int ice_vsi_rebuild_by_type(struct ice_pf *pf, enum ice_vsi_type type) /* rebuild the VSI */ err = ice_vsi_rebuild(vsi, true); if (err) { - dev_err(dev, - "rebuild VSI failed, err %d, VSI index %d, type %s\n", + dev_err(dev, "rebuild VSI failed, err %d, VSI index %d, type %s\n", err, vsi->idx, ice_vsi_type_str(type)); return err; } @@ -4591,8 +4543,7 @@ static int ice_vsi_rebuild_by_type(struct ice_pf *pf, enum ice_vsi_type type) /* replay filters for the VSI */ status = ice_replay_vsi(&pf->hw, vsi->idx); if (status) { - dev_err(dev, - "replay VSI failed, status %d, VSI index %d, type %s\n", + dev_err(dev, "replay VSI failed, status %d, VSI index %d, type %s\n", status, vsi->idx, ice_vsi_type_str(type)); return -EIO; } @@ -4605,8 +4556,7 @@ static int ice_vsi_rebuild_by_type(struct ice_pf *pf, enum ice_vsi_type type) /* enable the VSI */ err = ice_ena_vsi(vsi, false); if (err) { - dev_err(dev, - "enable VSI failed, err %d, VSI index %d, type %s\n", + dev_err(dev, "enable VSI failed, err %d, VSI index %d, type %s\n", err, vsi->idx, ice_vsi_type_str(type)); return err; } @@ -4684,8 +4634,7 @@ static void ice_rebuild(struct ice_pf *pf, enum ice_reset_req reset_type) } if (pf->first_sw->dflt_vsi_ena) - dev_info(dev, - "Clearing default VSI, re-enable after reset completes\n"); + dev_info(dev, "Clearing default VSI, re-enable after reset completes\n"); /* clear the default VSI configuration if it exists */ pf->first_sw->dflt_vsi = NULL; pf->first_sw->dflt_vsi_ena = false; @@ -4736,8 +4685,7 @@ static void ice_rebuild(struct ice_pf *pf, enum ice_reset_req reset_type) /* tell the firmware we are up */ ret = ice_send_version(pf); if (ret) { - dev_err(dev, - "Rebuild failed due to error sending driver version: %d\n", + dev_err(dev, "Rebuild failed due to error sending driver version: %d\n", ret); goto err_vsi_rebuild; } @@ -4993,7 +4941,7 @@ static int ice_vsi_update_bridge_mode(struct ice_vsi *vsi, u16 bmode) status = ice_update_vsi(hw, vsi->idx, ctxt, NULL); if (status) { - dev_err(&vsi->back->pdev->dev, "update VSI for bridge mode failed, bmode = %d err %d aq_err %d\n", + dev_err(ice_pf_to_dev(vsi->back), "update VSI for bridge mode failed, bmode = %d err %d aq_err %d\n", bmode, status, hw->adminq.sq_last_status); ret = -EIO; goto out; @@ -5185,8 +5133,7 @@ int ice_open(struct net_device *netdev) if (pi->phy.link_info.link_info & ICE_AQ_MEDIA_AVAILABLE) { err = ice_force_phys_link_state(vsi, true); if (err) { - netdev_err(netdev, - "Failed to set physical link up, error %d\n", + netdev_err(netdev, "Failed to set physical link up, error %d\n", err); return err; } diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c b/drivers/net/ethernet/intel/ice/ice_txrx.c index fd17ace6b226..4de61dbedd36 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx.c +++ b/drivers/net/ethernet/intel/ice/ice_txrx.c @@ -644,7 +644,7 @@ static bool ice_page_is_reserved(struct page *page) * Update the offset within page so that Rx buf will be ready to be reused. * For systems with PAGE_SIZE < 8192 this function will flip the page offset * so the second half of page assigned to Rx buffer will be used, otherwise - * the offset is moved by the @size bytes + * the offset is moved by "size" bytes */ static void ice_rx_buf_adjust_pg_offset(struct ice_rx_buf *rx_buf, unsigned int size) @@ -1078,8 +1078,6 @@ construct_skb: skb = ice_build_skb(rx_ring, rx_buf, &xdp); else skb = ice_construct_skb(rx_ring, rx_buf, &xdp); - } else { - skb = ice_construct_skb(rx_ring, rx_buf, &xdp); } /* exit if we failed to retrieve a buffer */ if (!skb) { @@ -1621,11 +1619,11 @@ ice_tx_map(struct ice_ring *tx_ring, struct ice_tx_buf *first, { u64 td_offset, td_tag, td_cmd; u16 i = tx_ring->next_to_use; - skb_frag_t *frag; unsigned int data_len, size; struct ice_tx_desc *tx_desc; struct ice_tx_buf *tx_buf; struct sk_buff *skb; + skb_frag_t *frag; dma_addr_t dma; td_tag = off->td_l2tag1; @@ -1738,9 +1736,8 @@ ice_tx_map(struct ice_ring *tx_ring, struct ice_tx_buf *first, ice_maybe_stop_tx(tx_ring, DESC_NEEDED); /* notify HW of packet */ - if (netif_xmit_stopped(txring_txq(tx_ring)) || !netdev_xmit_more()) { + if (netif_xmit_stopped(txring_txq(tx_ring)) || !netdev_xmit_more()) writel(i, tx_ring->tail); - } return; @@ -2078,7 +2075,7 @@ static bool __ice_chk_linearize(struct sk_buff *skb) frag = &skb_shinfo(skb)->frags[0]; /* Initialize size to the negative value of gso_size minus 1. We - * use this as the worst case scenerio in which the frag ahead + * use this as the worst case scenario in which the frag ahead * of us only provides one byte which is why we are limited to 6 * descriptors for a single transmit as the header and previous * fragment are already consuming 2 descriptors. diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.h b/drivers/net/ethernet/intel/ice/ice_txrx.h index a86270696df1..14a1bf445889 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx.h +++ b/drivers/net/ethernet/intel/ice/ice_txrx.h @@ -33,8 +33,8 @@ * frame. * * Note: For cache line sizes 256 or larger this value is going to end - * up negative. In these cases we should fall back to the legacy - * receive path. + * up negative. In these cases we should fall back to the legacy + * receive path. */ #if (PAGE_SIZE < 8192) #define ICE_2K_TOO_SMALL_WITH_PADDING \ diff --git a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c index 35bbc4ff603c..6da048a6ca7c 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c +++ b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c @@ -10,7 +10,7 @@ */ void ice_release_rx_desc(struct ice_ring *rx_ring, u32 val) { - u16 prev_ntu = rx_ring->next_to_use; + u16 prev_ntu = rx_ring->next_to_use & ~0x7; rx_ring->next_to_use = val; diff --git a/drivers/net/ethernet/intel/ice/ice_type.h b/drivers/net/ethernet/intel/ice/ice_type.h index b361ffabb0ca..db0ef6ba907f 100644 --- a/drivers/net/ethernet/intel/ice/ice_type.h +++ b/drivers/net/ethernet/intel/ice/ice_type.h @@ -517,7 +517,7 @@ struct ice_hw { struct ice_fw_log_cfg fw_log; /* Device max aggregate bandwidths corresponding to the GL_PWR_MODE_CTL - * register. Used for determining the ITR/intrl granularity during + * register. Used for determining the ITR/INTRL granularity during * initialization. */ #define ICE_MAX_AGG_BW_200G 0x0 diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c index 82b1e7a4cb92..262714d5f54a 100644 --- a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c @@ -199,8 +199,7 @@ static void ice_dis_vf_mappings(struct ice_vf *vf) if (vsi->rx_mapping_mode == ICE_VSI_MAP_CONTIG) wr32(hw, VPLAN_RX_QBASE(vf->vf_id), 0); else - dev_err(dev, - "Scattered mode for VF Rx queues is not yet implemented\n"); + dev_err(dev, "Scattered mode for VF Rx queues is not yet implemented\n"); } /** @@ -402,8 +401,7 @@ static void ice_trigger_vf_reset(struct ice_vf *vf, bool is_vflr, bool is_pfr) if ((reg & VF_TRANS_PENDING_M) == 0) break; - dev_err(dev, - "VF %d PCI transactions stuck\n", vf->vf_id); + dev_err(dev, "VF %d PCI transactions stuck\n", vf->vf_id); udelay(ICE_PCI_CIAD_WAIT_DELAY_US); } } @@ -462,7 +460,7 @@ static int ice_vsi_manage_pvid(struct ice_vsi *vsi, u16 vid, bool enable) status = ice_update_vsi(hw, vsi->idx, ctxt, NULL); if (status) { - dev_info(&vsi->back->pdev->dev, "update VSI for port VLAN failed, err %d aq_err %d\n", + dev_info(ice_pf_to_dev(vsi->back), "update VSI for port VLAN failed, err %d aq_err %d\n", status, hw->adminq.sq_last_status); ret = -EIO; goto out; @@ -1095,7 +1093,6 @@ bool ice_reset_all_vfs(struct ice_pf *pf, bool is_vflr) * finished resetting. */ for (i = 0, v = 0; i < 10 && v < pf->num_alloc_vfs; i++) { - /* Check each VF in sequence */ while (v < pf->num_alloc_vfs) { u32 reg; @@ -1553,8 +1550,7 @@ ice_vc_send_msg_to_vf(struct ice_vf *vf, u32 v_opcode, dev_info(dev, "VF %d failed opcode %d, retval: %d\n", vf->vf_id, v_opcode, v_retval); if (vf->num_inval_msgs > ICE_DFLT_NUM_INVAL_MSGS_ALLOWED) { - dev_err(dev, - "Number of invalid messages exceeded for VF %d\n", + dev_err(dev, "Number of invalid messages exceeded for VF %d\n", vf->vf_id); dev_err(dev, "Use PF Control I/F to enable the VF\n"); set_bit(ICE_VF_STATE_DIS, vf->vf_states); @@ -1569,8 +1565,7 @@ ice_vc_send_msg_to_vf(struct ice_vf *vf, u32 v_opcode, aq_ret = ice_aq_send_msg_to_vf(&pf->hw, vf->vf_id, v_opcode, v_retval, msg, msglen, NULL); if (aq_ret && pf->hw.mailboxq.sq_last_status != ICE_AQ_RC_ENOSYS) { - dev_info(dev, - "Unable to send the message to VF %d ret %d aq_err %d\n", + dev_info(dev, "Unable to send the message to VF %d ret %d aq_err %d\n", vf->vf_id, aq_ret, pf->hw.mailboxq.sq_last_status); return -EIO; } @@ -1914,8 +1909,7 @@ int ice_set_vf_spoofchk(struct net_device *netdev, int vf_id, bool ena) } if (vf_vsi->type != ICE_VSI_VF) { - netdev_err(netdev, - "Type %d of VSI %d for VF %d is no ICE_VSI_VF\n", + netdev_err(netdev, "Type %d of VSI %d for VF %d is no ICE_VSI_VF\n", vf_vsi->type, vf_vsi->vsi_num, vf->vf_id); return -ENODEV; } @@ -1945,8 +1939,7 @@ int ice_set_vf_spoofchk(struct net_device *netdev, int vf_id, bool ena) status = ice_update_vsi(&pf->hw, vf_vsi->idx, ctx, NULL); if (status) { - dev_err(dev, - "Failed to %sable spoofchk on VF %d VSI %d\n error %d", + dev_err(dev, "Failed to %sable spoofchk on VF %d VSI %d\n error %d", ena ? "en" : "dis", vf->vf_id, vf_vsi->vsi_num, status); ret = -EIO; goto out; @@ -2063,8 +2056,7 @@ static int ice_vc_ena_qs_msg(struct ice_vf *vf, u8 *msg) continue; if (ice_vsi_ctrl_rx_ring(vsi, true, vf_q_id)) { - dev_err(&vsi->back->pdev->dev, - "Failed to enable Rx ring %d on VSI %d\n", + dev_err(ice_pf_to_dev(vsi->back), "Failed to enable Rx ring %d on VSI %d\n", vf_q_id, vsi->vsi_num); v_ret = VIRTCHNL_STATUS_ERR_PARAM; goto error_param; @@ -2166,8 +2158,7 @@ static int ice_vc_dis_qs_msg(struct ice_vf *vf, u8 *msg) if (ice_vsi_stop_tx_ring(vsi, ICE_NO_RESET, vf->vf_id, ring, &txq_meta)) { - dev_err(&vsi->back->pdev->dev, - "Failed to stop Tx ring %d on VSI %d\n", + dev_err(ice_pf_to_dev(vsi->back), "Failed to stop Tx ring %d on VSI %d\n", vf_q_id, vsi->vsi_num); v_ret = VIRTCHNL_STATUS_ERR_PARAM; goto error_param; @@ -2193,8 +2184,7 @@ static int ice_vc_dis_qs_msg(struct ice_vf *vf, u8 *msg) continue; if (ice_vsi_ctrl_rx_ring(vsi, false, vf_q_id)) { - dev_err(&vsi->back->pdev->dev, - "Failed to stop Rx ring %d on VSI %d\n", + dev_err(ice_pf_to_dev(vsi->back), "Failed to stop Rx ring %d on VSI %d\n", vf_q_id, vsi->vsi_num); v_ret = VIRTCHNL_STATUS_ERR_PARAM; goto error_param; @@ -2357,8 +2347,7 @@ static int ice_vc_cfg_qs_msg(struct ice_vf *vf, u8 *msg) if (qci->num_queue_pairs > ICE_MAX_BASE_QS_PER_VF || qci->num_queue_pairs > min_t(u16, vsi->alloc_txq, vsi->alloc_rxq)) { - dev_err(ice_pf_to_dev(pf), - "VF-%d requesting more than supported number of queues: %d\n", + dev_err(ice_pf_to_dev(pf), "VF-%d requesting more than supported number of queues: %d\n", vf->vf_id, min_t(u16, vsi->alloc_txq, vsi->alloc_rxq)); v_ret = VIRTCHNL_STATUS_ERR_PARAM; goto error_param; @@ -2570,8 +2559,7 @@ ice_vc_handle_mac_addr_msg(struct ice_vf *vf, u8 *msg, bool set) */ if (set && !ice_is_vf_trusted(vf) && (vf->num_mac + al->num_elements) > ICE_MAX_MACADDR_PER_VF) { - dev_err(ice_pf_to_dev(pf), - "Can't add more MAC addresses, because VF-%d is not trusted, switch the VF to trusted mode in order to add more functionalities\n", + dev_err(ice_pf_to_dev(pf), "Can't add more MAC addresses, because VF-%d is not trusted, switch the VF to trusted mode in order to add more functionalities\n", vf->vf_id); v_ret = VIRTCHNL_STATUS_ERR_PARAM; goto handle_mac_exit; @@ -2648,8 +2636,8 @@ static int ice_vc_request_qs_msg(struct ice_vf *vf, u8 *msg) struct ice_pf *pf = vf->pf; u16 max_allowed_vf_queues; u16 tx_rx_queue_left; - u16 cur_queues; struct device *dev; + u16 cur_queues; dev = ice_pf_to_dev(pf); if (!test_bit(ICE_VF_STATE_ACTIVE, vf->vf_states)) { @@ -2670,8 +2658,7 @@ static int ice_vc_request_qs_msg(struct ice_vf *vf, u8 *msg) vfres->num_queue_pairs = ICE_MAX_BASE_QS_PER_VF; } else if (req_queues > cur_queues && req_queues - cur_queues > tx_rx_queue_left) { - dev_warn(dev, - "VF %d requested %u more queues, but only %u left.\n", + dev_warn(dev, "VF %d requested %u more queues, but only %u left.\n", vf->vf_id, req_queues - cur_queues, tx_rx_queue_left); vfres->num_queue_pairs = min_t(u16, max_allowed_vf_queues, ICE_MAX_BASE_QS_PER_VF); @@ -2821,8 +2808,8 @@ static int ice_vc_process_vlan_msg(struct ice_vf *vf, u8 *msg, bool add_v) for (i = 0; i < vfl->num_elements; i++) { if (vfl->vlan_id[i] > ICE_MAX_VLANID) { v_ret = VIRTCHNL_STATUS_ERR_PARAM; - dev_err(dev, - "invalid VF VLAN id %d\n", vfl->vlan_id[i]); + dev_err(dev, "invalid VF VLAN id %d\n", + vfl->vlan_id[i]); goto error_param; } } @@ -2836,8 +2823,7 @@ static int ice_vc_process_vlan_msg(struct ice_vf *vf, u8 *msg, bool add_v) if (add_v && !ice_is_vf_trusted(vf) && vsi->num_vlan >= ICE_MAX_VLAN_PER_VF) { - dev_info(dev, - "VF-%d is not trusted, switch the VF to trusted mode, in order to add more VLAN addresses\n", + dev_info(dev, "VF-%d is not trusted, switch the VF to trusted mode, in order to add more VLAN addresses\n", vf->vf_id); /* There is no need to let VF know about being not trusted, * so we can just return success message here @@ -2860,8 +2846,7 @@ static int ice_vc_process_vlan_msg(struct ice_vf *vf, u8 *msg, bool add_v) if (!ice_is_vf_trusted(vf) && vsi->num_vlan >= ICE_MAX_VLAN_PER_VF) { - dev_info(dev, - "VF-%d is not trusted, switch the VF to trusted mode, in order to add more VLAN addresses\n", + dev_info(dev, "VF-%d is not trusted, switch the VF to trusted mode, in order to add more VLAN addresses\n", vf->vf_id); /* There is no need to let VF know about being * not trusted, so we can just return success @@ -2889,8 +2874,7 @@ static int ice_vc_process_vlan_msg(struct ice_vf *vf, u8 *msg, bool add_v) status = ice_cfg_vlan_pruning(vsi, true, false); if (status) { v_ret = VIRTCHNL_STATUS_ERR_PARAM; - dev_err(dev, - "Enable VLAN pruning on VLAN ID: %d failed error-%d\n", + dev_err(dev, "Enable VLAN pruning on VLAN ID: %d failed error-%d\n", vid, status); goto error_param; } @@ -2903,8 +2887,7 @@ static int ice_vc_process_vlan_msg(struct ice_vf *vf, u8 *msg, bool add_v) promisc_m, vid); if (status) { v_ret = VIRTCHNL_STATUS_ERR_PARAM; - dev_err(dev, - "Enable Unicast/multicast promiscuous mode on VLAN ID:%d failed error-%d\n", + dev_err(dev, "Enable Unicast/multicast promiscuous mode on VLAN ID:%d failed error-%d\n", vid, status); } } @@ -3140,8 +3123,7 @@ error_handler: case VIRTCHNL_OP_GET_VF_RESOURCES: err = ice_vc_get_vf_res_msg(vf, msg); if (ice_vf_init_vlan_stripping(vf)) - dev_err(dev, - "Failed to initialize VLAN stripping for VF %d\n", + dev_err(dev, "Failed to initialize VLAN stripping for VF %d\n", vf->vf_id); ice_vc_notify_vf_link_state(vf); break; @@ -3313,8 +3295,7 @@ int ice_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac) */ ether_addr_copy(vf->dflt_lan_addr.addr, mac); vf->pf_set_mac = true; - netdev_info(netdev, - "MAC on VF %d set to %pM. VF driver will be reinitialized\n", + netdev_info(netdev, "MAC on VF %d set to %pM. VF driver will be reinitialized\n", vf_id, mac); ice_vc_reset_vf(vf); @@ -3332,10 +3313,8 @@ int ice_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac) int ice_set_vf_trust(struct net_device *netdev, int vf_id, bool trusted) { struct ice_pf *pf = ice_netdev_to_pf(netdev); - struct device *dev; struct ice_vf *vf; - dev = ice_pf_to_dev(pf); if (ice_validate_vf_id(pf, vf_id)) return -EINVAL; @@ -3358,7 +3337,7 @@ int ice_set_vf_trust(struct net_device *netdev, int vf_id, bool trusted) vf->trusted = trusted; ice_vc_reset_vf(vf); - dev_info(dev, "VF %u is now %strusted\n", + dev_info(ice_pf_to_dev(pf), "VF %u is now %strusted\n", vf_id, trusted ? "" : "un"); return 0; diff --git a/drivers/net/ethernet/intel/ice/ice_xsk.c b/drivers/net/ethernet/intel/ice/ice_xsk.c index 149dca0012ba..4d3407bbd4c4 100644 --- a/drivers/net/ethernet/intel/ice/ice_xsk.c +++ b/drivers/net/ethernet/intel/ice/ice_xsk.c @@ -338,8 +338,8 @@ static int ice_xsk_umem_dma_map(struct ice_vsi *vsi, struct xdp_umem *umem) DMA_BIDIRECTIONAL, ICE_RX_DMA_ATTR); if (dma_mapping_error(dev, dma)) { - dev_dbg(dev, - "XSK UMEM DMA mapping error on page num %d", i); + dev_dbg(dev, "XSK UMEM DMA mapping error on page num %d\n", + i); goto out_unmap; } diff --git a/drivers/net/ethernet/socionext/sni_ave.c b/drivers/net/ethernet/socionext/sni_ave.c index b7032422393f..67ddf782d98a 100644 --- a/drivers/net/ethernet/socionext/sni_ave.c +++ b/drivers/net/ethernet/socionext/sni_ave.c @@ -1810,6 +1810,9 @@ static int ave_pro4_get_pinmode(struct ave_private *priv, break; case PHY_INTERFACE_MODE_MII: case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII_RXID: + case PHY_INTERFACE_MODE_RGMII_TXID: priv->pinmode_val = 0; break; default: @@ -1854,6 +1857,9 @@ static int ave_ld20_get_pinmode(struct ave_private *priv, priv->pinmode_val = SG_ETPINMODE_RMII(0); break; case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII_RXID: + case PHY_INTERFACE_MODE_RGMII_TXID: priv->pinmode_val = 0; break; default: @@ -1876,6 +1882,9 @@ static int ave_pxs3_get_pinmode(struct ave_private *priv, priv->pinmode_val = SG_ETPINMODE_RMII(arg); break; case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII_RXID: + case PHY_INTERFACE_MODE_RGMII_TXID: priv->pinmode_val = 0; break; default: diff --git a/drivers/net/ethernet/sun/sunvnet_common.c b/drivers/net/ethernet/sun/sunvnet_common.c index c23ce838ff63..8dc6c9ff22e1 100644 --- a/drivers/net/ethernet/sun/sunvnet_common.c +++ b/drivers/net/ethernet/sun/sunvnet_common.c @@ -1350,27 +1350,12 @@ sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev, if (vio_version_after_eq(&port->vio, 1, 3)) localmtu -= VLAN_HLEN; - if (skb->protocol == htons(ETH_P_IP)) { - struct flowi4 fl4; - struct rtable *rt = NULL; - - memset(&fl4, 0, sizeof(fl4)); - fl4.flowi4_oif = dev->ifindex; - fl4.flowi4_tos = RT_TOS(ip_hdr(skb)->tos); - fl4.daddr = ip_hdr(skb)->daddr; - fl4.saddr = ip_hdr(skb)->saddr; - - rt = ip_route_output_key(dev_net(dev), &fl4); - if (!IS_ERR(rt)) { - skb_dst_set(skb, &rt->dst); - icmp_send(skb, ICMP_DEST_UNREACH, - ICMP_FRAG_NEEDED, - htonl(localmtu)); - } - } + if (skb->protocol == htons(ETH_P_IP)) + icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, + htonl(localmtu)); #if IS_ENABLED(CONFIG_IPV6) else if (skb->protocol == htons(ETH_P_IPV6)) - icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, localmtu); + icmpv6_ndo_send(skb, ICMPV6_PKT_TOOBIG, 0, localmtu); #endif goto out_dropped; } diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c index af07ea760b35..672cd2caf2fb 100644 --- a/drivers/net/gtp.c +++ b/drivers/net/gtp.c @@ -546,8 +546,8 @@ static int gtp_build_skb_ip4(struct sk_buff *skb, struct net_device *dev, mtu < ntohs(iph->tot_len)) { netdev_dbg(dev, "packet too big, fragmentation needed\n"); memset(IPCB(skb), 0, sizeof(*IPCB(skb))); - icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, - htonl(mtu)); + icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, + htonl(mtu)); goto err_rt; } diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c index 9485c8d1de8a..3b7a3b8a5e06 100644 --- a/drivers/net/usb/qmi_wwan.c +++ b/drivers/net/usb/qmi_wwan.c @@ -61,7 +61,6 @@ enum qmi_wwan_flags { enum qmi_wwan_quirks { QMI_WWAN_QUIRK_DTR = 1 << 0, /* needs "set DTR" request */ - QMI_WWAN_QUIRK_QUECTEL_DYNCFG = 1 << 1, /* check num. endpoints */ }; struct qmimux_hdr { @@ -916,16 +915,6 @@ static const struct driver_info qmi_wwan_info_quirk_dtr = { .data = QMI_WWAN_QUIRK_DTR, }; -static const struct driver_info qmi_wwan_info_quirk_quectel_dyncfg = { - .description = "WWAN/QMI device", - .flags = FLAG_WWAN | FLAG_SEND_ZLP, - .bind = qmi_wwan_bind, - .unbind = qmi_wwan_unbind, - .manage_power = qmi_wwan_manage_power, - .rx_fixup = qmi_wwan_rx_fixup, - .data = QMI_WWAN_QUIRK_DTR | QMI_WWAN_QUIRK_QUECTEL_DYNCFG, -}; - #define HUAWEI_VENDOR_ID 0x12D1 /* map QMI/wwan function by a fixed interface number */ @@ -946,14 +935,18 @@ static const struct driver_info qmi_wwan_info_quirk_quectel_dyncfg = { #define QMI_GOBI_DEVICE(vend, prod) \ QMI_FIXED_INTF(vend, prod, 0) -/* Quectel does not use fixed interface numbers on at least some of their - * devices. We need to check the number of endpoints to ensure that we bind to - * the correct interface. +/* Many devices have QMI and DIAG functions which are distinguishable + * from other vendor specific functions by class, subclass and + * protocol all being 0xff. The DIAG function has exactly 2 endpoints + * and is silently rejected when probed. + * + * This makes it possible to match dynamically numbered QMI functions + * as seen on e.g. many Quectel modems. */ -#define QMI_QUIRK_QUECTEL_DYNCFG(vend, prod) \ +#define QMI_MATCH_FF_FF_FF(vend, prod) \ USB_DEVICE_AND_INTERFACE_INFO(vend, prod, USB_CLASS_VENDOR_SPEC, \ USB_SUBCLASS_VENDOR_SPEC, 0xff), \ - .driver_info = (unsigned long)&qmi_wwan_info_quirk_quectel_dyncfg + .driver_info = (unsigned long)&qmi_wwan_info_quirk_dtr static const struct usb_device_id products[] = { /* 1. CDC ECM like devices match on the control interface */ @@ -1059,10 +1052,10 @@ static const struct usb_device_id products[] = { USB_DEVICE_AND_INTERFACE_INFO(0x03f0, 0x581d, USB_CLASS_VENDOR_SPEC, 1, 7), .driver_info = (unsigned long)&qmi_wwan_info, }, - {QMI_QUIRK_QUECTEL_DYNCFG(0x2c7c, 0x0125)}, /* Quectel EC25, EC20 R2.0 Mini PCIe */ - {QMI_QUIRK_QUECTEL_DYNCFG(0x2c7c, 0x0306)}, /* Quectel EP06/EG06/EM06 */ - {QMI_QUIRK_QUECTEL_DYNCFG(0x2c7c, 0x0512)}, /* Quectel EG12/EM12 */ - {QMI_QUIRK_QUECTEL_DYNCFG(0x2c7c, 0x0800)}, /* Quectel RM500Q-GL */ + {QMI_MATCH_FF_FF_FF(0x2c7c, 0x0125)}, /* Quectel EC25, EC20 R2.0 Mini PCIe */ + {QMI_MATCH_FF_FF_FF(0x2c7c, 0x0306)}, /* Quectel EP06/EG06/EM06 */ + {QMI_MATCH_FF_FF_FF(0x2c7c, 0x0512)}, /* Quectel EG12/EM12 */ + {QMI_MATCH_FF_FF_FF(0x2c7c, 0x0800)}, /* Quectel RM500Q-GL */ /* 3. Combined interface devices matching on interface number */ {QMI_FIXED_INTF(0x0408, 0xea42, 4)}, /* Yota / Megafon M100-1 */ @@ -1363,6 +1356,7 @@ static const struct usb_device_id products[] = { {QMI_FIXED_INTF(0x413c, 0x81b6, 8)}, /* Dell Wireless 5811e */ {QMI_FIXED_INTF(0x413c, 0x81b6, 10)}, /* Dell Wireless 5811e */ {QMI_FIXED_INTF(0x413c, 0x81d7, 0)}, /* Dell Wireless 5821e */ + {QMI_FIXED_INTF(0x413c, 0x81d7, 1)}, /* Dell Wireless 5821e preproduction config */ {QMI_FIXED_INTF(0x413c, 0x81e0, 0)}, /* Dell Wireless 5821e with eSIM support*/ {QMI_FIXED_INTF(0x03f0, 0x4e1d, 8)}, /* HP lt4111 LTE/EV-DO/HSPA+ Gobi 4G Module */ {QMI_FIXED_INTF(0x03f0, 0x9d1d, 1)}, /* HP lt4120 Snapdragon X5 LTE */ @@ -1454,7 +1448,6 @@ static int qmi_wwan_probe(struct usb_interface *intf, { struct usb_device_id *id = (struct usb_device_id *)prod; struct usb_interface_descriptor *desc = &intf->cur_altsetting->desc; - const struct driver_info *info; /* Workaround to enable dynamic IDs. This disables usbnet * blacklisting functionality. Which, if required, can be @@ -1490,12 +1483,8 @@ static int qmi_wwan_probe(struct usb_interface *intf, * different. Ignore the current interface if the number of endpoints * equals the number for the diag interface (two). */ - info = (void *)id->driver_info; - - if (info->data & QMI_WWAN_QUIRK_QUECTEL_DYNCFG) { - if (desc->bNumEndpoints == 2) - return -ENODEV; - } + if (desc->bNumEndpoints == 2) + return -ENODEV; return usbnet_probe(intf, id); } diff --git a/drivers/net/wireguard/device.c b/drivers/net/wireguard/device.c index 16b19824b9ad..43db442b1373 100644 --- a/drivers/net/wireguard/device.c +++ b/drivers/net/wireguard/device.c @@ -203,9 +203,9 @@ err_peer: err: ++dev->stats.tx_errors; if (skb->protocol == htons(ETH_P_IP)) - icmp_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0); + icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0); else if (skb->protocol == htons(ETH_P_IPV6)) - icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0); + icmpv6_ndo_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0); kfree_skb(skb); return ret; } diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 5dc32b72e7fa..ada59df642d2 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -66,8 +66,8 @@ MODULE_PARM_DESC(streams, "turn on support for Streams write directives"); * nvme_reset_wq - hosts nvme reset works * nvme_delete_wq - hosts nvme delete works * - * nvme_wq will host works such are scan, aen handling, fw activation, - * keep-alive error recovery, periodic reconnects etc. nvme_reset_wq + * nvme_wq will host works such as scan, aen handling, fw activation, + * keep-alive, periodic reconnects etc. nvme_reset_wq * runs reset works which also flush works hosted on nvme_wq for * serialization purposes. nvme_delete_wq host controller deletion * works which flush reset works for serialization. @@ -976,7 +976,7 @@ static void nvme_keep_alive_end_io(struct request *rq, blk_status_t status) startka = true; spin_unlock_irqrestore(&ctrl->lock, flags); if (startka) - schedule_delayed_work(&ctrl->ka_work, ctrl->kato * HZ); + queue_delayed_work(nvme_wq, &ctrl->ka_work, ctrl->kato * HZ); } static int nvme_keep_alive(struct nvme_ctrl *ctrl) @@ -1006,7 +1006,7 @@ static void nvme_keep_alive_work(struct work_struct *work) dev_dbg(ctrl->device, "reschedule traffic based keep-alive timer\n"); ctrl->comp_seen = false; - schedule_delayed_work(&ctrl->ka_work, ctrl->kato * HZ); + queue_delayed_work(nvme_wq, &ctrl->ka_work, ctrl->kato * HZ); return; } @@ -1023,7 +1023,7 @@ static void nvme_start_keep_alive(struct nvme_ctrl *ctrl) if (unlikely(ctrl->kato == 0)) return; - schedule_delayed_work(&ctrl->ka_work, ctrl->kato * HZ); + queue_delayed_work(nvme_wq, &ctrl->ka_work, ctrl->kato * HZ); } void nvme_stop_keep_alive(struct nvme_ctrl *ctrl) @@ -3867,7 +3867,7 @@ static void nvme_get_fw_slot_info(struct nvme_ctrl *ctrl) if (!log) return; - if (nvme_get_log(ctrl, NVME_NSID_ALL, 0, NVME_LOG_FW_SLOT, log, + if (nvme_get_log(ctrl, NVME_NSID_ALL, NVME_LOG_FW_SLOT, 0, log, sizeof(*log), 0)) dev_warn(ctrl->device, "Get FW SLOT INFO log error\n"); kfree(log); diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index da392b50f73e..9c80f9f08149 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1401,6 +1401,23 @@ static void nvme_disable_admin_queue(struct nvme_dev *dev, bool shutdown) nvme_poll_irqdisable(nvmeq, -1); } +/* + * Called only on a device that has been disabled and after all other threads + * that can check this device's completion queues have synced. This is the + * last chance for the driver to see a natural completion before + * nvme_cancel_request() terminates all incomplete requests. + */ +static void nvme_reap_pending_cqes(struct nvme_dev *dev) +{ + u16 start, end; + int i; + + for (i = dev->ctrl.queue_count - 1; i > 0; i--) { + nvme_process_cq(&dev->queues[i], &start, &end, -1); + nvme_complete_cqes(&dev->queues[i], start, end); + } +} + static int nvme_cmb_qdepth(struct nvme_dev *dev, int nr_io_queues, int entry_size) { @@ -2235,11 +2252,6 @@ static bool __nvme_disable_io_queues(struct nvme_dev *dev, u8 opcode) if (timeout == 0) return false; - /* handle any remaining CQEs */ - if (opcode == nvme_admin_delete_cq && - !test_bit(NVMEQ_DELETE_ERROR, &nvmeq->flags)) - nvme_poll_irqdisable(nvmeq, -1); - sent--; if (nr_queues) goto retry; @@ -2428,6 +2440,7 @@ static void nvme_dev_disable(struct nvme_dev *dev, bool shutdown) nvme_suspend_io_queues(dev); nvme_suspend_queue(&dev->queues[0]); nvme_pci_disable(dev); + nvme_reap_pending_cqes(dev); blk_mq_tagset_busy_iter(&dev->tagset, nvme_cancel_request, &dev->ctrl); blk_mq_tagset_busy_iter(&dev->admin_tagset, nvme_cancel_request, &dev->ctrl); diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index 2a47c6c5007e..3e85c5cacefd 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -1088,7 +1088,7 @@ static void nvme_rdma_error_recovery(struct nvme_rdma_ctrl *ctrl) if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RESETTING)) return; - queue_work(nvme_wq, &ctrl->err_work); + queue_work(nvme_reset_wq, &ctrl->err_work); } static void nvme_rdma_wr_error(struct ib_cq *cq, struct ib_wc *wc, diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c index 6d43b23a0fc8..49d4373b84eb 100644 --- a/drivers/nvme/host/tcp.c +++ b/drivers/nvme/host/tcp.c @@ -422,7 +422,7 @@ static void nvme_tcp_error_recovery(struct nvme_ctrl *ctrl) if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING)) return; - queue_work(nvme_wq, &to_tcp_ctrl(ctrl)->err_work); + queue_work(nvme_reset_wq, &to_tcp_ctrl(ctrl)->err_work); } static int nvme_tcp_process_nvme_cqe(struct nvme_tcp_queue *queue, @@ -1054,7 +1054,12 @@ static void nvme_tcp_io_work(struct work_struct *w) } else if (unlikely(result < 0)) { dev_err(queue->ctrl->ctrl.device, "failed to send request %d\n", result); - if (result != -EPIPE) + + /* + * Fail the request unless peer closed the connection, + * in which case error recovery flow will complete all. + */ + if ((result != -EPIPE) && (result != -ECONNRESET)) nvme_tcp_fail_request(queue->request); nvme_tcp_done_send_req(queue); return; diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c index d704eccc548f..f01a57e5a5f3 100644 --- a/drivers/perf/arm_smmuv3_pmu.c +++ b/drivers/perf/arm_smmuv3_pmu.c @@ -771,7 +771,7 @@ static int smmu_pmu_probe(struct platform_device *pdev) smmu_pmu->reloc_base = smmu_pmu->reg_base; } - irq = platform_get_irq(pdev, 0); + irq = platform_get_irq_optional(pdev, 0); if (irq > 0) smmu_pmu->irq = irq; diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h index 4b0798472643..ff74eb5fce50 100644 --- a/drivers/s390/cio/qdio.h +++ b/drivers/s390/cio/qdio.h @@ -182,11 +182,9 @@ enum qdio_queue_irq_states { }; struct qdio_input_q { - /* input buffer acknowledgement flag */ - int polling; /* first ACK'ed buffer */ int ack_start; - /* how much sbals are acknowledged with qebsm */ + /* how many SBALs are acknowledged */ int ack_count; /* last time of noticing incoming data */ u64 timestamp; diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c index 35410e6eda2e..9c0370b27426 100644 --- a/drivers/s390/cio/qdio_debug.c +++ b/drivers/s390/cio/qdio_debug.c @@ -124,9 +124,8 @@ static int qstat_show(struct seq_file *m, void *v) seq_printf(m, "nr_used: %d ftc: %d\n", atomic_read(&q->nr_buf_used), q->first_to_check); if (q->is_input_q) { - seq_printf(m, "polling: %d ack start: %d ack count: %d\n", - q->u.in.polling, q->u.in.ack_start, - q->u.in.ack_count); + seq_printf(m, "ack start: %d ack count: %d\n", + q->u.in.ack_start, q->u.in.ack_count); seq_printf(m, "DSCI: %x IRQs disabled: %u\n", *(u8 *)q->irq_ptr->dsci, test_bit(QDIO_QUEUE_IRQS_DISABLED, diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c index f8b897b7e78b..3475317c42e5 100644 --- a/drivers/s390/cio/qdio_main.c +++ b/drivers/s390/cio/qdio_main.c @@ -393,19 +393,15 @@ int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr, static inline void qdio_stop_polling(struct qdio_q *q) { - if (!q->u.in.polling) + if (!q->u.in.ack_count) return; - q->u.in.polling = 0; qperf_inc(q, stop_polling); /* show the card that we are not polling anymore */ - if (is_qebsm(q)) { - set_buf_states(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT, - q->u.in.ack_count); - q->u.in.ack_count = 0; - } else - set_buf_state(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT); + set_buf_states(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT, + q->u.in.ack_count); + q->u.in.ack_count = 0; } static inline void account_sbals(struct qdio_q *q, unsigned int count) @@ -451,8 +447,7 @@ static inline void inbound_primed(struct qdio_q *q, unsigned int start, /* for QEBSM the ACK was already set by EQBS */ if (is_qebsm(q)) { - if (!q->u.in.polling) { - q->u.in.polling = 1; + if (!q->u.in.ack_count) { q->u.in.ack_count = count; q->u.in.ack_start = start; return; @@ -471,12 +466,12 @@ static inline void inbound_primed(struct qdio_q *q, unsigned int start, * or by the next inbound run. */ new = add_buf(start, count - 1); - if (q->u.in.polling) { + if (q->u.in.ack_count) { /* reset the previous ACK but first set the new one */ set_buf_state(q, new, SLSB_P_INPUT_ACK); set_buf_state(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT); } else { - q->u.in.polling = 1; + q->u.in.ack_count = 1; set_buf_state(q, new, SLSB_P_INPUT_ACK); } @@ -1479,13 +1474,12 @@ static int handle_inbound(struct qdio_q *q, unsigned int callflags, qperf_inc(q, inbound_call); - if (!q->u.in.polling) + if (!q->u.in.ack_count) goto set; /* protect against stop polling setting an ACK for an emptied slsb */ if (count == QDIO_MAX_BUFFERS_PER_Q) { /* overwriting everything, just delete polling status */ - q->u.in.polling = 0; q->u.in.ack_count = 0; goto set; } else if (buf_in_between(q->u.in.ack_start, bufnr, count)) { @@ -1495,15 +1489,14 @@ static int handle_inbound(struct qdio_q *q, unsigned int callflags, diff = sub_buf(diff, q->u.in.ack_start); q->u.in.ack_count -= diff; if (q->u.in.ack_count <= 0) { - q->u.in.polling = 0; q->u.in.ack_count = 0; goto set; } q->u.in.ack_start = add_buf(q->u.in.ack_start, diff); + } else { + /* the only ACK will be deleted */ + q->u.in.ack_count = 0; } - else - /* the only ACK will be deleted, so stop polling */ - q->u.in.polling = 0; } set: diff --git a/drivers/s390/cio/qdio_setup.c b/drivers/s390/cio/qdio_setup.c index dc430bd86ade..3ab8e80d7bbc 100644 --- a/drivers/s390/cio/qdio_setup.c +++ b/drivers/s390/cio/qdio_setup.c @@ -536,7 +536,7 @@ void qdio_print_subchannel_info(struct qdio_irq *irq_ptr, int qdio_enable_async_operation(struct qdio_output_q *outq) { outq->aobs = kcalloc(QDIO_MAX_BUFFERS_PER_Q, sizeof(struct qaob *), - GFP_ATOMIC); + GFP_KERNEL); if (!outq->aobs) { outq->use_cq = 0; return -ENOMEM; diff --git a/drivers/s390/cio/vfio_ccw_trace.h b/drivers/s390/cio/vfio_ccw_trace.h index 30162a318a8a..f5d31887d413 100644 --- a/drivers/s390/cio/vfio_ccw_trace.h +++ b/drivers/s390/cio/vfio_ccw_trace.h @@ -1,5 +1,5 @@ -/* SPDX-License-Identifier: GPL-2.0 - * Tracepoints for vfio_ccw driver +/* SPDX-License-Identifier: GPL-2.0 */ +/* Tracepoints for vfio_ccw driver * * Copyright IBM Corp. 2018 * diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h index bb35ba4a8d24..4348fdff1c61 100644 --- a/drivers/s390/crypto/ap_bus.h +++ b/drivers/s390/crypto/ap_bus.h @@ -162,7 +162,7 @@ struct ap_card { unsigned int functions; /* AP device function bitfield. */ int queue_depth; /* AP queue depth.*/ int id; /* AP card number. */ - atomic_t total_request_count; /* # requests ever for this AP device.*/ + atomic64_t total_request_count; /* # requests ever for this AP device.*/ }; #define to_ap_card(x) container_of((x), struct ap_card, ap_dev.device) @@ -179,7 +179,7 @@ struct ap_queue { enum ap_state state; /* State of the AP device. */ int pendingq_count; /* # requests on pendingq list. */ int requestq_count; /* # requests on requestq list. */ - int total_request_count; /* # requests ever for this AP device.*/ + u64 total_request_count; /* # requests ever for this AP device.*/ int request_timeout; /* Request timeout in jiffies. */ struct timer_list timeout; /* Timer for request timeouts. */ struct list_head pendingq; /* List of message sent to AP queue. */ diff --git a/drivers/s390/crypto/ap_card.c b/drivers/s390/crypto/ap_card.c index 63b4cc6cd7e5..e85bfca1ed16 100644 --- a/drivers/s390/crypto/ap_card.c +++ b/drivers/s390/crypto/ap_card.c @@ -63,13 +63,13 @@ static ssize_t request_count_show(struct device *dev, char *buf) { struct ap_card *ac = to_ap_card(dev); - unsigned int req_cnt; + u64 req_cnt; req_cnt = 0; spin_lock_bh(&ap_list_lock); - req_cnt = atomic_read(&ac->total_request_count); + req_cnt = atomic64_read(&ac->total_request_count); spin_unlock_bh(&ap_list_lock); - return snprintf(buf, PAGE_SIZE, "%d\n", req_cnt); + return snprintf(buf, PAGE_SIZE, "%llu\n", req_cnt); } static ssize_t request_count_store(struct device *dev, @@ -83,7 +83,7 @@ static ssize_t request_count_store(struct device *dev, for_each_ap_queue(aq, ac) aq->total_request_count = 0; spin_unlock_bh(&ap_list_lock); - atomic_set(&ac->total_request_count, 0); + atomic64_set(&ac->total_request_count, 0); return count; } diff --git a/drivers/s390/crypto/ap_queue.c b/drivers/s390/crypto/ap_queue.c index 37c3bdc3642d..a317ab484932 100644 --- a/drivers/s390/crypto/ap_queue.c +++ b/drivers/s390/crypto/ap_queue.c @@ -479,12 +479,12 @@ static ssize_t request_count_show(struct device *dev, char *buf) { struct ap_queue *aq = to_ap_queue(dev); - unsigned int req_cnt; + u64 req_cnt; spin_lock_bh(&aq->lock); req_cnt = aq->total_request_count; spin_unlock_bh(&aq->lock); - return snprintf(buf, PAGE_SIZE, "%d\n", req_cnt); + return snprintf(buf, PAGE_SIZE, "%llu\n", req_cnt); } static ssize_t request_count_store(struct device *dev, @@ -676,7 +676,7 @@ void ap_queue_message(struct ap_queue *aq, struct ap_message *ap_msg) list_add_tail(&ap_msg->list, &aq->requestq); aq->requestq_count++; aq->total_request_count++; - atomic_inc(&aq->card->total_request_count); + atomic64_inc(&aq->card->total_request_count); /* Send/receive as many request from the queue as possible. */ ap_wait(ap_sm_event_loop(aq, AP_EVENT_POLL)); spin_unlock_bh(&aq->lock); diff --git a/drivers/s390/crypto/pkey_api.c b/drivers/s390/crypto/pkey_api.c index 71dae64ba994..2f33c5fcf676 100644 --- a/drivers/s390/crypto/pkey_api.c +++ b/drivers/s390/crypto/pkey_api.c @@ -994,7 +994,7 @@ static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd, return -EFAULT; rc = cca_sec2protkey(ksp.cardnr, ksp.domain, ksp.seckey.seckey, ksp.protkey.protkey, - NULL, &ksp.protkey.type); + &ksp.protkey.len, &ksp.protkey.type); DEBUG_DBG("%s cca_sec2protkey()=%d\n", __func__, rc); if (rc) break; diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c index a42257d6c79e..56a405dce8bc 100644 --- a/drivers/s390/crypto/zcrypt_api.c +++ b/drivers/s390/crypto/zcrypt_api.c @@ -606,8 +606,8 @@ static inline bool zcrypt_card_compare(struct zcrypt_card *zc, weight += atomic_read(&zc->load); pref_weight += atomic_read(&pref_zc->load); if (weight == pref_weight) - return atomic_read(&zc->card->total_request_count) > - atomic_read(&pref_zc->card->total_request_count); + return atomic64_read(&zc->card->total_request_count) > + atomic64_read(&pref_zc->card->total_request_count); return weight > pref_weight; } @@ -1226,11 +1226,12 @@ static void zcrypt_qdepth_mask(char qdepth[], size_t max_adapters) spin_unlock(&zcrypt_list_lock); } -static void zcrypt_perdev_reqcnt(int reqcnt[], size_t max_adapters) +static void zcrypt_perdev_reqcnt(u32 reqcnt[], size_t max_adapters) { struct zcrypt_card *zc; struct zcrypt_queue *zq; int card; + u64 cnt; memset(reqcnt, 0, sizeof(int) * max_adapters); spin_lock(&zcrypt_list_lock); @@ -1242,8 +1243,9 @@ static void zcrypt_perdev_reqcnt(int reqcnt[], size_t max_adapters) || card >= max_adapters) continue; spin_lock(&zq->queue->lock); - reqcnt[card] = zq->queue->total_request_count; + cnt = zq->queue->total_request_count; spin_unlock(&zq->queue->lock); + reqcnt[card] = (cnt < UINT_MAX) ? (u32) cnt : UINT_MAX; } } local_bh_enable(); @@ -1421,9 +1423,9 @@ static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd, return 0; } case ZCRYPT_PERDEV_REQCNT: { - int *reqcnt; + u32 *reqcnt; - reqcnt = kcalloc(AP_DEVICES, sizeof(int), GFP_KERNEL); + reqcnt = kcalloc(AP_DEVICES, sizeof(u32), GFP_KERNEL); if (!reqcnt) return -ENOMEM; zcrypt_perdev_reqcnt(reqcnt, AP_DEVICES); @@ -1480,7 +1482,7 @@ static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd, } case Z90STAT_PERDEV_REQCNT: { /* the old ioctl supports only 64 adapters */ - int reqcnt[MAX_ZDEV_CARDIDS]; + u32 reqcnt[MAX_ZDEV_CARDIDS]; zcrypt_perdev_reqcnt(reqcnt, MAX_ZDEV_CARDIDS); if (copy_to_user((int __user *) arg, reqcnt, sizeof(reqcnt))) diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c index 97acc2ba2912..de844b412110 100644 --- a/drivers/spmi/spmi-pmic-arb.c +++ b/drivers/spmi/spmi-pmic-arb.c @@ -731,6 +731,7 @@ static int qpnpint_irq_domain_translate(struct irq_domain *d, return 0; } +static struct lock_class_key qpnpint_irq_lock_class, qpnpint_irq_request_class; static void qpnpint_irq_domain_map(struct spmi_pmic_arb *pmic_arb, struct irq_domain *domain, unsigned int virq, @@ -746,6 +747,9 @@ static void qpnpint_irq_domain_map(struct spmi_pmic_arb *pmic_arb, else handler = handle_level_irq; + + irq_set_lockdep_class(virq, &qpnpint_irq_lock_class, + &qpnpint_irq_request_class); irq_domain_set_info(domain, virq, hwirq, &pmic_arb_irqchip, pmic_arb, handler, NULL, NULL); } diff --git a/drivers/tee/amdtee/core.c b/drivers/tee/amdtee/core.c index 6370bb55f512..0026eb6f13ce 100644 --- a/drivers/tee/amdtee/core.c +++ b/drivers/tee/amdtee/core.c @@ -212,6 +212,19 @@ unlock: return rc; } +static void destroy_session(struct kref *ref) +{ + struct amdtee_session *sess = container_of(ref, struct amdtee_session, + refcount); + + /* Unload the TA from TEE */ + handle_unload_ta(sess->ta_handle); + mutex_lock(&session_list_mutex); + list_del(&sess->list_node); + mutex_unlock(&session_list_mutex); + kfree(sess); +} + int amdtee_open_session(struct tee_context *ctx, struct tee_ioctl_open_session_arg *arg, struct tee_param *param) @@ -236,15 +249,13 @@ int amdtee_open_session(struct tee_context *ctx, /* Load the TA binary into TEE environment */ handle_load_ta(ta, ta_size, arg); - if (arg->ret == TEEC_SUCCESS) { - mutex_lock(&session_list_mutex); - sess = alloc_session(ctxdata, arg->session); - mutex_unlock(&session_list_mutex); - } - if (arg->ret != TEEC_SUCCESS) goto out; + mutex_lock(&session_list_mutex); + sess = alloc_session(ctxdata, arg->session); + mutex_unlock(&session_list_mutex); + if (!sess) { rc = -ENOMEM; goto out; @@ -259,40 +270,29 @@ int amdtee_open_session(struct tee_context *ctx, if (i >= TEE_NUM_SESSIONS) { pr_err("reached maximum session count %d\n", TEE_NUM_SESSIONS); + kref_put(&sess->refcount, destroy_session); rc = -ENOMEM; goto out; } /* Open session with loaded TA */ handle_open_session(arg, &session_info, param); - - if (arg->ret == TEEC_SUCCESS) { - sess->session_info[i] = session_info; - set_session_id(sess->ta_handle, i, &arg->session); - } else { + if (arg->ret != TEEC_SUCCESS) { pr_err("open_session failed %d\n", arg->ret); spin_lock(&sess->lock); clear_bit(i, sess->sess_mask); spin_unlock(&sess->lock); + kref_put(&sess->refcount, destroy_session); + goto out; } + + sess->session_info[i] = session_info; + set_session_id(sess->ta_handle, i, &arg->session); out: free_pages((u64)ta, get_order(ta_size)); return rc; } -static void destroy_session(struct kref *ref) -{ - struct amdtee_session *sess = container_of(ref, struct amdtee_session, - refcount); - - /* Unload the TA from TEE */ - handle_unload_ta(sess->ta_handle); - mutex_lock(&session_list_mutex); - list_del(&sess->list_node); - mutex_unlock(&session_list_mutex); - kfree(sess); -} - int amdtee_close_session(struct tee_context *ctx, u32 session) { struct amdtee_context_data *ctxdata = ctx->data; diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 7fa9bb79ad08..89422aa8e9d1 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -3164,6 +3164,7 @@ int __cold open_ctree(struct super_block *sb, /* do not make disk changes in broken FS or nologreplay is given */ if (btrfs_super_log_root(disk_super) != 0 && !btrfs_test_opt(fs_info, NOLOGREPLAY)) { + btrfs_info(fs_info, "start tree-log replay"); ret = btrfs_replay_log(fs_info, fs_devices); if (ret) { err = ret; diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index 6f417ff68980..bd6229fb2b6f 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -237,6 +237,17 @@ static void try_merge_map(struct extent_map_tree *tree, struct extent_map *em) struct extent_map *merge = NULL; struct rb_node *rb; + /* + * We can't modify an extent map that is in the tree and that is being + * used by another task, as it can cause that other task to see it in + * inconsistent state during the merging. We always have 1 reference for + * the tree and 1 for this task (which is unpinning the extent map or + * clearing the logging flag), so anything > 2 means it's being used by + * other tasks too. + */ + if (refcount_read(&em->refs) > 2) + return; + if (em->start != 0) { rb = rb_prev(&em->rb_node); if (rb) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 5b3ec93ff911..7d26b4bfb2c6 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -4085,6 +4085,8 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, u64 bytes_deleted = 0; bool be_nice = false; bool should_throttle = false; + const u64 lock_start = ALIGN_DOWN(new_size, fs_info->sectorsize); + struct extent_state *cached_state = NULL; BUG_ON(new_size > 0 && min_type != BTRFS_EXTENT_DATA_KEY); @@ -4101,6 +4103,9 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, return -ENOMEM; path->reada = READA_BACK; + lock_extent_bits(&BTRFS_I(inode)->io_tree, lock_start, (u64)-1, + &cached_state); + /* * We want to drop from the next block forward in case this new size is * not block aligned since we will be keeping the last block of the @@ -4367,6 +4372,9 @@ out: btrfs_ordered_update_i_size(inode, last_size, NULL); } + unlock_extent_cached(&BTRFS_I(inode)->io_tree, lock_start, (u64)-1, + &cached_state); + btrfs_free_path(path); return ret; } diff --git a/fs/btrfs/ref-verify.c b/fs/btrfs/ref-verify.c index b57f3618e58e..454a1015d026 100644 --- a/fs/btrfs/ref-verify.c +++ b/fs/btrfs/ref-verify.c @@ -744,6 +744,7 @@ int btrfs_ref_tree_mod(struct btrfs_fs_info *fs_info, */ be = add_block_entry(fs_info, bytenr, num_bytes, ref_root); if (IS_ERR(be)) { + kfree(ref); kfree(ra); ret = PTR_ERR(be); goto out; @@ -757,6 +758,8 @@ int btrfs_ref_tree_mod(struct btrfs_fs_info *fs_info, "re-allocated a block that still has references to it!"); dump_block_entry(fs_info, be); dump_ref_action(fs_info, ra); + kfree(ref); + kfree(ra); goto out_unlock; } @@ -819,6 +822,7 @@ int btrfs_ref_tree_mod(struct btrfs_fs_info *fs_info, "dropping a ref for a existing root that doesn't have a ref on the block"); dump_block_entry(fs_info, be); dump_ref_action(fs_info, ra); + kfree(ref); kfree(ra); goto out_unlock; } @@ -834,6 +838,7 @@ int btrfs_ref_tree_mod(struct btrfs_fs_info *fs_info, "attempting to add another ref for an existing ref on a tree block"); dump_block_entry(fs_info, be); dump_ref_action(fs_info, ra); + kfree(ref); kfree(ra); goto out_unlock; } diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 0616a5434793..67c63858812a 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1834,6 +1834,8 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data) } if (btrfs_super_log_root(fs_info->super_copy) != 0) { + btrfs_warn(fs_info, + "mount required to replay tree-log, cannot remount read-write"); ret = -EINVAL; goto restore; } diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 7436422194da..3c10e78924d0 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -901,6 +901,12 @@ static int addrm_unknown_feature_attrs(struct btrfs_fs_info *fs_info, bool add) static void __btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs) { + if (fs_devs->devinfo_kobj) { + kobject_del(fs_devs->devinfo_kobj); + kobject_put(fs_devs->devinfo_kobj); + fs_devs->devinfo_kobj = NULL; + } + if (fs_devs->devices_kobj) { kobject_del(fs_devs->devices_kobj); kobject_put(fs_devs->devices_kobj); @@ -1289,7 +1295,7 @@ int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices, init_completion(&dev->kobj_unregister); error = kobject_init_and_add(&dev->devid_kobj, &devid_ktype, - fs_devices->devices_kobj, "%llu", + fs_devices->devinfo_kobj, "%llu", dev->devid); if (error) { kobject_put(&dev->devid_kobj); @@ -1369,6 +1375,15 @@ int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs) return -ENOMEM; } + fs_devs->devinfo_kobj = kobject_create_and_add("devinfo", + &fs_devs->fsid_kobj); + if (!fs_devs->devinfo_kobj) { + btrfs_err(fs_devs->fs_info, + "failed to init sysfs devinfo kobject"); + btrfs_sysfs_remove_fsid(fs_devs); + return -ENOMEM; + } + return 0; } diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 409f4816fb89..f01552a0785e 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -258,6 +258,7 @@ struct btrfs_fs_devices { /* sysfs kobjects */ struct kobject fsid_kobj; struct kobject *devices_kobj; + struct kobject *devinfo_kobj; struct completion kobj_unregister; }; diff --git a/fs/ceph/file.c b/fs/ceph/file.c index c3b8e8e0bf17..7e0190b1f821 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -1418,6 +1418,7 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from) struct ceph_cap_flush *prealloc_cf; ssize_t count, written = 0; int err, want, got; + bool direct_lock = false; loff_t pos; loff_t limit = max(i_size_read(inode), fsc->max_file_size); @@ -1428,8 +1429,11 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from) if (!prealloc_cf) return -ENOMEM; + if ((iocb->ki_flags & (IOCB_DIRECT | IOCB_APPEND)) == IOCB_DIRECT) + direct_lock = true; + retry_snap: - if (iocb->ki_flags & IOCB_DIRECT) + if (direct_lock) ceph_start_io_direct(inode); else ceph_start_io_write(inode); @@ -1519,14 +1523,15 @@ retry_snap: /* we might need to revert back to that point */ data = *from; - if (iocb->ki_flags & IOCB_DIRECT) { + if (iocb->ki_flags & IOCB_DIRECT) written = ceph_direct_read_write(iocb, &data, snapc, &prealloc_cf); - ceph_end_io_direct(inode); - } else { + else written = ceph_sync_write(iocb, &data, pos, snapc); + if (direct_lock) + ceph_end_io_direct(inode); + else ceph_end_io_write(inode); - } if (written > 0) iov_iter_advance(from, written); ceph_put_snap_context(snapc); @@ -1577,7 +1582,7 @@ retry_snap: goto out_unlocked; out: - if (iocb->ki_flags & IOCB_DIRECT) + if (direct_lock) ceph_end_io_direct(inode); else ceph_end_io_write(inode); diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 1d9f083b8a11..c7f150686a53 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -203,6 +203,26 @@ struct ceph_parse_opts_ctx { }; /* + * Remove adjacent slashes and then the trailing slash, unless it is + * the only remaining character. + * + * E.g. "//dir1////dir2///" --> "/dir1/dir2", "///" --> "/". + */ +static void canonicalize_path(char *path) +{ + int i, j = 0; + + for (i = 0; path[i] != '\0'; i++) { + if (path[i] != '/' || j < 1 || path[j - 1] != '/') + path[j++] = path[i]; + } + + if (j > 1 && path[j - 1] == '/') + j--; + path[j] = '\0'; +} + +/* * Parse the source parameter. Distinguish the server list from the path. * * The source will look like: @@ -224,15 +244,16 @@ static int ceph_parse_source(struct fs_parameter *param, struct fs_context *fc) dev_name_end = strchr(dev_name, '/'); if (dev_name_end) { - kfree(fsopt->server_path); - /* * The server_path will include the whole chars from userland * including the leading '/'. */ + kfree(fsopt->server_path); fsopt->server_path = kstrdup(dev_name_end, GFP_KERNEL); if (!fsopt->server_path) return -ENOMEM; + + canonicalize_path(fsopt->server_path); } else { dev_name_end = dev_name + strlen(dev_name); } @@ -456,73 +477,6 @@ static int strcmp_null(const char *s1, const char *s2) return strcmp(s1, s2); } -/** - * path_remove_extra_slash - Remove the extra slashes in the server path - * @server_path: the server path and could be NULL - * - * Return NULL if the path is NULL or only consists of "/", or a string - * without any extra slashes including the leading slash(es) and the - * slash(es) at the end of the server path, such as: - * "//dir1////dir2///" --> "dir1/dir2" - */ -static char *path_remove_extra_slash(const char *server_path) -{ - const char *path = server_path; - const char *cur, *end; - char *buf, *p; - int len; - - /* if the server path is omitted */ - if (!path) - return NULL; - - /* remove all the leading slashes */ - while (*path == '/') - path++; - - /* if the server path only consists of slashes */ - if (*path == '\0') - return NULL; - - len = strlen(path); - - buf = kmalloc(len + 1, GFP_KERNEL); - if (!buf) - return ERR_PTR(-ENOMEM); - - end = path + len; - p = buf; - do { - cur = strchr(path, '/'); - if (!cur) - cur = end; - - len = cur - path; - - /* including one '/' */ - if (cur != end) - len += 1; - - memcpy(p, path, len); - p += len; - - while (cur <= end && *cur == '/') - cur++; - path = cur; - } while (path < end); - - *p = '\0'; - - /* - * remove the last slash if there has and just to make sure that - * we will get something like "dir1/dir2" - */ - if (*(--p) == '/') - *p = '\0'; - - return buf; -} - static int compare_mount_options(struct ceph_mount_options *new_fsopt, struct ceph_options *new_opt, struct ceph_fs_client *fsc) @@ -530,7 +484,6 @@ static int compare_mount_options(struct ceph_mount_options *new_fsopt, struct ceph_mount_options *fsopt1 = new_fsopt; struct ceph_mount_options *fsopt2 = fsc->mount_options; int ofs = offsetof(struct ceph_mount_options, snapdir_name); - char *p1, *p2; int ret; ret = memcmp(fsopt1, fsopt2, ofs); @@ -540,21 +493,12 @@ static int compare_mount_options(struct ceph_mount_options *new_fsopt, ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name); if (ret) return ret; + ret = strcmp_null(fsopt1->mds_namespace, fsopt2->mds_namespace); if (ret) return ret; - p1 = path_remove_extra_slash(fsopt1->server_path); - if (IS_ERR(p1)) - return PTR_ERR(p1); - p2 = path_remove_extra_slash(fsopt2->server_path); - if (IS_ERR(p2)) { - kfree(p1); - return PTR_ERR(p2); - } - ret = strcmp_null(p1, p2); - kfree(p1); - kfree(p2); + ret = strcmp_null(fsopt1->server_path, fsopt2->server_path); if (ret) return ret; @@ -957,7 +901,9 @@ static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc, mutex_lock(&fsc->client->mount_mutex); if (!fsc->sb->s_root) { - const char *path, *p; + const char *path = fsc->mount_options->server_path ? + fsc->mount_options->server_path + 1 : ""; + err = __ceph_open_session(fsc->client, started); if (err < 0) goto out; @@ -969,22 +915,11 @@ static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc, goto out; } - p = path_remove_extra_slash(fsc->mount_options->server_path); - if (IS_ERR(p)) { - err = PTR_ERR(p); - goto out; - } - /* if the server path is omitted or just consists of '/' */ - if (!p) - path = ""; - else - path = p; dout("mount opening path '%s'\n", path); ceph_fs_debugfs_init(fsc); root = open_root_dentry(fsc, path, started); - kfree(p); if (IS_ERR(root)) { err = PTR_ERR(root); goto out; @@ -1097,10 +1032,6 @@ static int ceph_get_tree(struct fs_context *fc) if (!fc->source) return invalfc(fc, "No source"); -#ifdef CONFIG_CEPH_FS_POSIX_ACL - fc->sb_flags |= SB_POSIXACL; -#endif - /* create client (which we may/may not use) */ fsc = create_fs_client(pctx->opts, pctx->copts); pctx->opts = NULL; @@ -1223,6 +1154,10 @@ static int ceph_init_fs_context(struct fs_context *fc) fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT; fsopt->congestion_kb = default_congestion_kb(); +#ifdef CONFIG_CEPH_FS_POSIX_ACL + fc->sb_flags |= SB_POSIXACL; +#endif + fc->fs_private = pctx; fc->ops = &ceph_context_ops; return 0; diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 1e456a9011bb..037cdfb2ad4f 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -91,7 +91,7 @@ struct ceph_mount_options { char *snapdir_name; /* default ".snap" */ char *mds_namespace; /* default NULL */ - char *server_path; /* default "/" */ + char *server_path; /* default NULL (means "/") */ char *fscache_uniq; /* default NULL */ }; diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c index 440828afcdde..716574aab3b6 100644 --- a/fs/cifs/cifsacl.c +++ b/fs/cifs/cifsacl.c @@ -601,7 +601,7 @@ static void access_flags_to_mode(__le32 ace_flags, int type, umode_t *pmode, ((flags & FILE_EXEC_RIGHTS) == FILE_EXEC_RIGHTS)) *pmode |= (S_IXUGO & (*pbits_to_set)); - cifs_dbg(NOISY, "access flags 0x%x mode now 0x%x\n", flags, *pmode); + cifs_dbg(NOISY, "access flags 0x%x mode now %04o\n", flags, *pmode); return; } @@ -630,7 +630,7 @@ static void mode_to_access_flags(umode_t mode, umode_t bits_to_use, if (mode & S_IXUGO) *pace_flags |= SET_FILE_EXEC_RIGHTS; - cifs_dbg(NOISY, "mode: 0x%x, access flags now 0x%x\n", + cifs_dbg(NOISY, "mode: %04o, access flags now 0x%x\n", mode, *pace_flags); return; } diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index febab27cd838..46ebaf3f0824 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -414,7 +414,7 @@ cifs_show_security(struct seq_file *s, struct cifs_ses *ses) seq_puts(s, "ntlm"); break; case Kerberos: - seq_printf(s, "krb5,cruid=%u", from_kuid_munged(&init_user_ns,ses->cred_uid)); + seq_puts(s, "krb5"); break; case RawNTLMSSP: seq_puts(s, "ntlmssp"); @@ -427,6 +427,10 @@ cifs_show_security(struct seq_file *s, struct cifs_ses *ses) if (ses->sign) seq_puts(s, "i"); + + if (ses->sectype == Kerberos) + seq_printf(s, ",cruid=%u", + from_kuid_munged(&init_user_ns, ses->cred_uid)); } static void diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index a941ac7a659d..4804d1df8c1c 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -4151,7 +4151,7 @@ int cifs_setup_cifs_sb(struct smb_vol *pvolume_info, cifs_sb->mnt_gid = pvolume_info->linux_gid; cifs_sb->mnt_file_mode = pvolume_info->file_mode; cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; - cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n", + cifs_dbg(FYI, "file mode: %04ho dir mode: %04ho\n", cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); cifs_sb->actimeo = pvolume_info->actimeo; diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 9ba623b601ec..b5e6635c578e 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -1648,7 +1648,7 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode) struct TCP_Server_Info *server; char *full_path; - cifs_dbg(FYI, "In cifs_mkdir, mode = 0x%hx inode = 0x%p\n", + cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n", mode, inode); cifs_sb = CIFS_SB(inode->i_sb); diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index baa825f4cec0..e47190cae163 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -1116,7 +1116,8 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, void *data[1]; struct smb2_file_full_ea_info *ea = NULL; struct kvec close_iov[1]; - int rc; + struct smb2_query_info_rsp *rsp; + int rc, used_len = 0; if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; @@ -1139,6 +1140,38 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, cifs_sb); if (rc == -ENODATA) goto sea_exit; + } else { + /* If we are adding a attribute we should first check + * if there will be enough space available to store + * the new EA. If not we should not add it since we + * would not be able to even read the EAs back. + */ + rc = smb2_query_info_compound(xid, tcon, utf16_path, + FILE_READ_EA, + FILE_FULL_EA_INFORMATION, + SMB2_O_INFO_FILE, + CIFSMaxBufSize - + MAX_SMB2_CREATE_RESPONSE_SIZE - + MAX_SMB2_CLOSE_RESPONSE_SIZE, + &rsp_iov[1], &resp_buftype[1], cifs_sb); + if (rc == 0) { + rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; + used_len = le32_to_cpu(rsp->OutputBufferLength); + } + free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); + resp_buftype[1] = CIFS_NO_BUFFER; + memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); + rc = 0; + + /* Use a fudge factor of 256 bytes in case we collide + * with a different set_EAs command. + */ + if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - + MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < + used_len + ea_name_len + ea_value_len + 1) { + rc = -ENOSPC; + goto sea_exit; + } } } @@ -4795,6 +4828,7 @@ struct smb_version_operations smb21_operations = { .wp_retry_size = smb2_wp_retry_size, .dir_needs_close = smb2_dir_needs_close, .enum_snapshots = smb3_enum_snapshots, + .notify = smb3_notify, .get_dfs_refer = smb2_get_dfs_refer, .select_sectype = smb2_select_sectype, #ifdef CONFIG_CIFS_XATTR @@ -937,12 +937,11 @@ static int dax_writeback_one(struct xa_state *xas, struct dax_device *dax_dev, * on persistent storage prior to completion of the operation. */ int dax_writeback_mapping_range(struct address_space *mapping, - struct block_device *bdev, struct writeback_control *wbc) + struct dax_device *dax_dev, struct writeback_control *wbc) { XA_STATE(xas, &mapping->i_pages, wbc->range_start >> PAGE_SHIFT); struct inode *inode = mapping->host; pgoff_t end_index = wbc->range_end >> PAGE_SHIFT; - struct dax_device *dax_dev; void *entry; int ret = 0; unsigned int scanned = 0; @@ -953,10 +952,6 @@ int dax_writeback_mapping_range(struct address_space *mapping, if (!mapping->nrexceptional || wbc->sync_mode != WB_SYNC_ALL) return 0; - dax_dev = dax_get_by_host(bdev->bd_disk->disk_name); - if (!dax_dev) - return -EIO; - trace_dax_writeback_range(inode, xas.xa_index, end_index); tag_pages_for_writeback(mapping, xas.xa_index, end_index); @@ -977,7 +972,6 @@ int dax_writeback_mapping_range(struct address_space *mapping, xas_lock_irq(&xas); } xas_unlock_irq(&xas); - put_dax(dax_dev); trace_dax_writeback_range_done(inode, xas.xa_index, end_index); return ret; } @@ -1207,6 +1201,9 @@ dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter, lockdep_assert_held(&inode->i_rwsem); } + if (iocb->ki_flags & IOCB_NOWAIT) + flags |= IOMAP_NOWAIT; + while (iov_iter_count(iter)) { ret = iomap_apply(inode, pos, iov_iter_count(iter), flags, ops, iter, dax_iomap_actor); diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index 119667e65890..c885cf7d724b 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -960,8 +960,9 @@ ext2_writepages(struct address_space *mapping, struct writeback_control *wbc) static int ext2_dax_writepages(struct address_space *mapping, struct writeback_control *wbc) { - return dax_writeback_mapping_range(mapping, - mapping->host->i_sb->s_bdev, wbc); + struct ext2_sb_info *sbi = EXT2_SB(mapping->host->i_sb); + + return dax_writeback_mapping_range(mapping, sbi->s_daxdev, wbc); } const struct address_space_operations ext2_aops = { diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c index 1ee04e76bbe0..0a734ffb4310 100644 --- a/fs/ext4/block_validity.c +++ b/fs/ext4/block_validity.c @@ -207,6 +207,7 @@ static int ext4_protect_reserved_inode(struct super_block *sb, return PTR_ERR(inode); num = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; while (i < num) { + cond_resched(); map.m_lblk = i; map.m_len = num - i; n = ext4_map_blocks(NULL, inode, &map, 0); diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index 1f340743c9a8..9aa1f75409b0 100644 --- a/fs/ext4/dir.c +++ b/fs/ext4/dir.c @@ -129,12 +129,14 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx) if (err != ERR_BAD_DX_DIR) { return err; } - /* - * We don't set the inode dirty flag since it's not - * critical that it get flushed back to the disk. - */ - ext4_clear_inode_flag(file_inode(file), - EXT4_INODE_INDEX); + /* Can we just clear INDEX flag to ignore htree information? */ + if (!ext4_has_metadata_csum(sb)) { + /* + * We don't set the inode dirty flag since it's not + * critical that it gets flushed back to the disk. + */ + ext4_clear_inode_flag(inode, EXT4_INODE_INDEX); + } } if (ext4_has_inline_data(inode)) { diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 9a2ee2428ecc..4441331d06cc 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2544,8 +2544,11 @@ void ext4_insert_dentry(struct inode *inode, struct ext4_filename *fname); static inline void ext4_update_dx_flag(struct inode *inode) { - if (!ext4_has_feature_dir_index(inode->i_sb)) + if (!ext4_has_feature_dir_index(inode->i_sb)) { + /* ext4_iget() should have caught this... */ + WARN_ON_ONCE(ext4_has_feature_metadata_csum(inode->i_sb)); ext4_clear_inode_flag(inode, EXT4_INODE_INDEX); + } } static const unsigned char ext4_filetype_table[] = { DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 3313168b680f..e60aca791d3f 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -2867,7 +2867,7 @@ static int ext4_dax_writepages(struct address_space *mapping, percpu_down_read(&sbi->s_journal_flag_rwsem); trace_ext4_writepages(inode, wbc); - ret = dax_writeback_mapping_range(mapping, inode->i_sb->s_bdev, wbc); + ret = dax_writeback_mapping_range(mapping, sbi->s_daxdev, wbc); trace_ext4_writepages_result(inode, wbc, ret, nr_to_write - wbc->nr_to_write); percpu_up_read(&sbi->s_journal_flag_rwsem); @@ -4644,6 +4644,18 @@ struct inode *__ext4_iget(struct super_block *sb, unsigned long ino, ret = -EFSCORRUPTED; goto bad_inode; } + /* + * If dir_index is not enabled but there's dir with INDEX flag set, + * we'd normally treat htree data as empty space. But with metadata + * checksumming that corrupts checksums so forbid that. + */ + if (!ext4_has_feature_dir_index(sb) && ext4_has_metadata_csum(sb) && + ext4_test_inode_flag(inode, EXT4_INODE_INDEX)) { + ext4_error_inode(inode, function, line, 0, + "iget: Dir with htree data on filesystem without dir_index feature."); + ret = -EFSCORRUPTED; + goto bad_inode; + } ei->i_disksize = inode->i_size; #ifdef CONFIG_QUOTA ei->i_reserved_quota = 0; diff --git a/fs/ext4/mmp.c b/fs/ext4/mmp.c index 1c44b1a32001..87f7551c5132 100644 --- a/fs/ext4/mmp.c +++ b/fs/ext4/mmp.c @@ -120,10 +120,10 @@ void __dump_mmp_msg(struct super_block *sb, struct mmp_struct *mmp, { __ext4_warning(sb, function, line, "%s", msg); __ext4_warning(sb, function, line, - "MMP failure info: last update time: %llu, last update " - "node: %s, last update device: %s", - (long long unsigned int) le64_to_cpu(mmp->mmp_time), - mmp->mmp_nodename, mmp->mmp_bdevname); + "MMP failure info: last update time: %llu, last update node: %.*s, last update device: %.*s", + (unsigned long long)le64_to_cpu(mmp->mmp_time), + (int)sizeof(mmp->mmp_nodename), mmp->mmp_nodename, + (int)sizeof(mmp->mmp_bdevname), mmp->mmp_bdevname); } /* @@ -154,6 +154,7 @@ static int kmmpd(void *data) mmp_check_interval = max(EXT4_MMP_CHECK_MULT * mmp_update_interval, EXT4_MMP_MIN_CHECK_INTERVAL); mmp->mmp_check_interval = cpu_to_le16(mmp_check_interval); + BUILD_BUG_ON(sizeof(mmp->mmp_bdevname) < BDEVNAME_SIZE); bdevname(bh->b_bdev, mmp->mmp_bdevname); memcpy(mmp->mmp_nodename, init_utsname()->nodename, @@ -379,7 +380,8 @@ skip: /* * Start a kernel thread to update the MMP block periodically. */ - EXT4_SB(sb)->s_mmp_tsk = kthread_run(kmmpd, mmpd_data, "kmmpd-%s", + EXT4_SB(sb)->s_mmp_tsk = kthread_run(kmmpd, mmpd_data, "kmmpd-%.*s", + (int)sizeof(mmp->mmp_bdevname), bdevname(bh->b_bdev, mmp->mmp_bdevname)); if (IS_ERR(EXT4_SB(sb)->s_mmp_tsk)) { diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 129d2ebae00d..ceff4b4b1877 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -2213,6 +2213,13 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry, retval = ext4_dx_add_entry(handle, &fname, dir, inode); if (!retval || (retval != ERR_BAD_DX_DIR)) goto out; + /* Can we just ignore htree data? */ + if (ext4_has_metadata_csum(sb)) { + EXT4_ERROR_INODE(dir, + "Directory has corrupted htree index."); + retval = -EFSCORRUPTED; + goto out; + } ext4_clear_inode_flag(dir, EXT4_INODE_INDEX); dx_fallback++; ext4_mark_inode_dirty(handle, dir); diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 8434217549b3..f464dff09774 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3009,17 +3009,11 @@ static int ext4_feature_set_ok(struct super_block *sb, int readonly) return 0; } -#ifndef CONFIG_QUOTA - if (ext4_has_feature_quota(sb) && !readonly) { +#if !defined(CONFIG_QUOTA) || !defined(CONFIG_QFMT_V2) + if (!readonly && (ext4_has_feature_quota(sb) || + ext4_has_feature_project(sb))) { ext4_msg(sb, KERN_ERR, - "Filesystem with quota feature cannot be mounted RDWR " - "without CONFIG_QUOTA"); - return 0; - } - if (ext4_has_feature_project(sb) && !readonly) { - ext4_msg(sb, KERN_ERR, - "Filesystem with project quota feature cannot be mounted RDWR " - "without CONFIG_QUOTA"); + "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); return 0; } #endif /* CONFIG_QUOTA */ @@ -3814,6 +3808,15 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) */ sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; + blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); + if (blocksize < EXT4_MIN_BLOCK_SIZE || + blocksize > EXT4_MAX_BLOCK_SIZE) { + ext4_msg(sb, KERN_ERR, + "Unsupported filesystem blocksize %d (%d log_block_size)", + blocksize, le32_to_cpu(es->s_log_block_size)); + goto failed_mount; + } + if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; @@ -3831,6 +3834,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) ext4_msg(sb, KERN_ERR, "unsupported inode size: %d", sbi->s_inode_size); + ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); goto failed_mount; } /* @@ -4033,14 +4037,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) goto failed_mount; - blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); - if (blocksize < EXT4_MIN_BLOCK_SIZE || - blocksize > EXT4_MAX_BLOCK_SIZE) { - ext4_msg(sb, KERN_ERR, - "Unsupported filesystem blocksize %d (%d log_block_size)", - blocksize, le32_to_cpu(es->s_log_block_size)); - goto failed_mount; - } if (le32_to_cpu(es->s_log_block_size) > (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { ext4_msg(sb, KERN_ERR, @@ -5585,10 +5581,7 @@ static int ext4_statfs_project(struct super_block *sb, return PTR_ERR(dquot); spin_lock(&dquot->dq_dqb_lock); - limit = 0; - if (dquot->dq_dqb.dqb_bsoftlimit && - (!limit || dquot->dq_dqb.dqb_bsoftlimit < limit)) - limit = dquot->dq_dqb.dqb_bsoftlimit; + limit = dquot->dq_dqb.dqb_bsoftlimit; if (dquot->dq_dqb.dqb_bhardlimit && (!limit || dquot->dq_dqb.dqb_bhardlimit < limit)) limit = dquot->dq_dqb.dqb_bhardlimit; @@ -5603,10 +5596,7 @@ static int ext4_statfs_project(struct super_block *sb, (buf->f_blocks - curblock) : 0; } - limit = 0; - if (dquot->dq_dqb.dqb_isoftlimit && - (!limit || dquot->dq_dqb.dqb_isoftlimit < limit)) - limit = dquot->dq_dqb.dqb_isoftlimit; + limit = dquot->dq_dqb.dqb_isoftlimit; if (dquot->dq_dqb.dqb_ihardlimit && (!limit || dquot->dq_dqb.dqb_ihardlimit < limit)) limit = dquot->dq_dqb.dqb_ihardlimit; diff --git a/fs/io-wq.c b/fs/io-wq.c index cb60a42b9fdf..0a5ab1a8f69a 100644 --- a/fs/io-wq.c +++ b/fs/io-wq.c @@ -16,6 +16,7 @@ #include <linux/slab.h> #include <linux/kthread.h> #include <linux/rculist_nulls.h> +#include <linux/fs_struct.h> #include "io-wq.h" @@ -59,6 +60,7 @@ struct io_worker { const struct cred *cur_creds; const struct cred *saved_creds; struct files_struct *restore_files; + struct fs_struct *restore_fs; }; #if BITS_PER_LONG == 64 @@ -151,6 +153,9 @@ static bool __io_worker_unuse(struct io_wqe *wqe, struct io_worker *worker) task_unlock(current); } + if (current->fs != worker->restore_fs) + current->fs = worker->restore_fs; + /* * If we have an active mm, we need to drop the wq lock before unusing * it. If we do, return true and let the caller retry the idle loop. @@ -311,6 +316,7 @@ static void io_worker_start(struct io_wqe *wqe, struct io_worker *worker) worker->flags |= (IO_WORKER_F_UP | IO_WORKER_F_RUNNING); worker->restore_files = current->files; + worker->restore_fs = current->fs; io_wqe_inc_running(wqe, worker); } @@ -481,6 +487,8 @@ next: current->files = work->files; task_unlock(current); } + if (work->fs && current->fs != work->fs) + current->fs = work->fs; if (work->mm != worker->mm) io_wq_switch_mm(worker, work); if (worker->cur_creds != work->creds) @@ -691,11 +699,16 @@ static int io_wq_manager(void *data) /* create fixed workers */ refcount_set(&wq->refs, workers_to_create); for_each_node(node) { + if (!node_online(node)) + continue; if (!create_io_worker(wq, wq->wqes[node], IO_WQ_ACCT_BOUND)) goto err; workers_to_create--; } + while (workers_to_create--) + refcount_dec(&wq->refs); + complete(&wq->done); while (!kthread_should_stop()) { @@ -703,6 +716,9 @@ static int io_wq_manager(void *data) struct io_wqe *wqe = wq->wqes[node]; bool fork_worker[2] = { false, false }; + if (!node_online(node)) + continue; + spin_lock_irq(&wqe->lock); if (io_wqe_need_worker(wqe, IO_WQ_ACCT_BOUND)) fork_worker[IO_WQ_ACCT_BOUND] = true; @@ -821,7 +837,9 @@ static bool io_wq_for_each_worker(struct io_wqe *wqe, list_for_each_entry_rcu(worker, &wqe->all_list, all_list) { if (io_worker_get(worker)) { - ret = func(worker, data); + /* no task if node is/was offline */ + if (worker->task) + ret = func(worker, data); io_worker_release(worker); if (ret) break; @@ -929,17 +947,19 @@ enum io_wq_cancel io_wq_cancel_cb(struct io_wq *wq, work_cancel_fn *cancel, return ret; } +struct work_match { + bool (*fn)(struct io_wq_work *, void *data); + void *data; +}; + static bool io_wq_worker_cancel(struct io_worker *worker, void *data) { - struct io_wq_work *work = data; + struct work_match *match = data; unsigned long flags; bool ret = false; - if (worker->cur_work != work) - return false; - spin_lock_irqsave(&worker->lock, flags); - if (worker->cur_work == work && + if (match->fn(worker->cur_work, match->data) && !(worker->cur_work->flags & IO_WQ_WORK_NO_CANCEL)) { send_sig(SIGINT, worker->task, 1); ret = true; @@ -950,15 +970,13 @@ static bool io_wq_worker_cancel(struct io_worker *worker, void *data) } static enum io_wq_cancel io_wqe_cancel_work(struct io_wqe *wqe, - struct io_wq_work *cwork) + struct work_match *match) { struct io_wq_work_node *node, *prev; struct io_wq_work *work; unsigned long flags; bool found = false; - cwork->flags |= IO_WQ_WORK_CANCEL; - /* * First check pending list, if we're lucky we can just remove it * from there. CANCEL_OK means that the work is returned as-new, @@ -968,7 +986,7 @@ static enum io_wq_cancel io_wqe_cancel_work(struct io_wqe *wqe, wq_list_for_each(node, prev, &wqe->work_list) { work = container_of(node, struct io_wq_work, list); - if (work == cwork) { + if (match->fn(work, match->data)) { wq_node_del(&wqe->work_list, node, prev); found = true; break; @@ -989,20 +1007,60 @@ static enum io_wq_cancel io_wqe_cancel_work(struct io_wqe *wqe, * completion will run normally in this case. */ rcu_read_lock(); - found = io_wq_for_each_worker(wqe, io_wq_worker_cancel, cwork); + found = io_wq_for_each_worker(wqe, io_wq_worker_cancel, match); rcu_read_unlock(); return found ? IO_WQ_CANCEL_RUNNING : IO_WQ_CANCEL_NOTFOUND; } +static bool io_wq_work_match(struct io_wq_work *work, void *data) +{ + return work == data; +} + enum io_wq_cancel io_wq_cancel_work(struct io_wq *wq, struct io_wq_work *cwork) { + struct work_match match = { + .fn = io_wq_work_match, + .data = cwork + }; enum io_wq_cancel ret = IO_WQ_CANCEL_NOTFOUND; int node; + cwork->flags |= IO_WQ_WORK_CANCEL; + for_each_node(node) { struct io_wqe *wqe = wq->wqes[node]; - ret = io_wqe_cancel_work(wqe, cwork); + ret = io_wqe_cancel_work(wqe, &match); + if (ret != IO_WQ_CANCEL_NOTFOUND) + break; + } + + return ret; +} + +static bool io_wq_pid_match(struct io_wq_work *work, void *data) +{ + pid_t pid = (pid_t) (unsigned long) data; + + if (work) + return work->task_pid == pid; + return false; +} + +enum io_wq_cancel io_wq_cancel_pid(struct io_wq *wq, pid_t pid) +{ + struct work_match match = { + .fn = io_wq_pid_match, + .data = (void *) (unsigned long) pid + }; + enum io_wq_cancel ret = IO_WQ_CANCEL_NOTFOUND; + int node; + + for_each_node(node) { + struct io_wqe *wqe = wq->wqes[node]; + + ret = io_wqe_cancel_work(wqe, &match); if (ret != IO_WQ_CANCEL_NOTFOUND) break; } @@ -1036,6 +1094,8 @@ void io_wq_flush(struct io_wq *wq) for_each_node(node) { struct io_wqe *wqe = wq->wqes[node]; + if (!node_online(node)) + continue; init_completion(&data.done); INIT_IO_WORK(&data.work, io_wq_flush_func); data.work.flags |= IO_WQ_WORK_INTERNAL; @@ -1067,12 +1127,15 @@ struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data) for_each_node(node) { struct io_wqe *wqe; + int alloc_node = node; - wqe = kzalloc_node(sizeof(struct io_wqe), GFP_KERNEL, node); + if (!node_online(alloc_node)) + alloc_node = NUMA_NO_NODE; + wqe = kzalloc_node(sizeof(struct io_wqe), GFP_KERNEL, alloc_node); if (!wqe) goto err; wq->wqes[node] = wqe; - wqe->node = node; + wqe->node = alloc_node; wqe->acct[IO_WQ_ACCT_BOUND].max_workers = bounded; atomic_set(&wqe->acct[IO_WQ_ACCT_BOUND].nr_running, 0); if (wq->user) { @@ -1080,7 +1143,6 @@ struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data) task_rlimit(current, RLIMIT_NPROC); } atomic_set(&wqe->acct[IO_WQ_ACCT_UNBOUND].nr_running, 0); - wqe->node = node; wqe->wq = wq; spin_lock_init(&wqe->lock); INIT_WQ_LIST(&wqe->work_list); diff --git a/fs/io-wq.h b/fs/io-wq.h index 50b3378febf2..ccc7d84af57d 100644 --- a/fs/io-wq.h +++ b/fs/io-wq.h @@ -74,17 +74,20 @@ struct io_wq_work { struct files_struct *files; struct mm_struct *mm; const struct cred *creds; + struct fs_struct *fs; unsigned flags; + pid_t task_pid; }; #define INIT_IO_WORK(work, _func) \ do { \ (work)->list.next = NULL; \ (work)->func = _func; \ - (work)->flags = 0; \ (work)->files = NULL; \ (work)->mm = NULL; \ (work)->creds = NULL; \ + (work)->fs = NULL; \ + (work)->flags = 0; \ } while (0) \ typedef void (get_work_fn)(struct io_wq_work *); @@ -107,6 +110,7 @@ void io_wq_flush(struct io_wq *wq); void io_wq_cancel_all(struct io_wq *wq); enum io_wq_cancel io_wq_cancel_work(struct io_wq *wq, struct io_wq_work *cwork); +enum io_wq_cancel io_wq_cancel_pid(struct io_wq *wq, pid_t pid); typedef bool (work_cancel_fn)(struct io_wq_work *, void *); diff --git a/fs/io_uring.c b/fs/io_uring.c index 77f22c3da30f..5a826017ebb8 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -75,6 +75,7 @@ #include <linux/fsnotify.h> #include <linux/fadvise.h> #include <linux/eventpoll.h> +#include <linux/fs_struct.h> #define CREATE_TRACE_POINTS #include <trace/events/io_uring.h> @@ -204,11 +205,11 @@ struct io_ring_ctx { struct { unsigned int flags; - int compat: 1; - int account_mem: 1; - int cq_overflow_flushed: 1; - int drain_next: 1; - int eventfd_async: 1; + unsigned int compat: 1; + unsigned int account_mem: 1; + unsigned int cq_overflow_flushed: 1; + unsigned int drain_next: 1; + unsigned int eventfd_async: 1; /* * Ring buffer of indices into array of io_uring_sqe, which is @@ -441,6 +442,7 @@ struct io_async_msghdr { struct iovec *iov; struct sockaddr __user *uaddr; struct msghdr msg; + struct sockaddr_storage addr; }; struct io_async_rw { @@ -450,17 +452,12 @@ struct io_async_rw { ssize_t size; }; -struct io_async_open { - struct filename *filename; -}; - struct io_async_ctx { union { struct io_async_rw rw; struct io_async_msghdr msg; struct io_async_connect connect; struct io_timeout_data timeout; - struct io_async_open open; }; }; @@ -483,6 +480,8 @@ enum { REQ_F_MUST_PUNT_BIT, REQ_F_TIMEOUT_NOSEQ_BIT, REQ_F_COMP_LOCKED_BIT, + REQ_F_NEED_CLEANUP_BIT, + REQ_F_OVERFLOW_BIT, }; enum { @@ -521,6 +520,10 @@ enum { REQ_F_TIMEOUT_NOSEQ = BIT(REQ_F_TIMEOUT_NOSEQ_BIT), /* completion under lock */ REQ_F_COMP_LOCKED = BIT(REQ_F_COMP_LOCKED_BIT), + /* needs cleanup */ + REQ_F_NEED_CLEANUP = BIT(REQ_F_NEED_CLEANUP_BIT), + /* in overflow list */ + REQ_F_OVERFLOW = BIT(REQ_F_OVERFLOW_BIT), }; /* @@ -553,7 +556,6 @@ struct io_kiocb { * llist_node is only used for poll deferred completions */ struct llist_node llist_node; - bool has_user; bool in_async; bool needs_fixed_file; u8 opcode; @@ -614,6 +616,8 @@ struct io_op_def { unsigned not_supported : 1; /* needs file table */ unsigned file_table : 1; + /* needs ->fs */ + unsigned needs_fs : 1; }; static const struct io_op_def io_op_defs[] = { @@ -656,12 +660,14 @@ static const struct io_op_def io_op_defs[] = { .needs_mm = 1, .needs_file = 1, .unbound_nonreg_file = 1, + .needs_fs = 1, }, [IORING_OP_RECVMSG] = { .async_ctx = 1, .needs_mm = 1, .needs_file = 1, .unbound_nonreg_file = 1, + .needs_fs = 1, }, [IORING_OP_TIMEOUT] = { .async_ctx = 1, @@ -692,6 +698,7 @@ static const struct io_op_def io_op_defs[] = { .needs_file = 1, .fd_non_neg = 1, .file_table = 1, + .needs_fs = 1, }, [IORING_OP_CLOSE] = { .needs_file = 1, @@ -705,6 +712,7 @@ static const struct io_op_def io_op_defs[] = { .needs_mm = 1, .needs_file = 1, .fd_non_neg = 1, + .needs_fs = 1, }, [IORING_OP_READ] = { .needs_mm = 1, @@ -736,6 +744,7 @@ static const struct io_op_def io_op_defs[] = { .needs_file = 1, .fd_non_neg = 1, .file_table = 1, + .needs_fs = 1, }, [IORING_OP_EPOLL_CTL] = { .unbound_nonreg_file = 1, @@ -754,6 +763,7 @@ static int __io_sqe_files_update(struct io_ring_ctx *ctx, unsigned nr_args); static int io_grab_files(struct io_kiocb *req); static void io_ring_file_ref_flush(struct fixed_file_data *data); +static void io_cleanup_req(struct io_kiocb *req); static struct kmem_cache *req_cachep; @@ -909,6 +919,18 @@ static inline void io_req_work_grab_env(struct io_kiocb *req, } if (!req->work.creds) req->work.creds = get_current_cred(); + if (!req->work.fs && def->needs_fs) { + spin_lock(¤t->fs->lock); + if (!current->fs->in_exec) { + req->work.fs = current->fs; + req->work.fs->users++; + } else { + req->work.flags |= IO_WQ_WORK_CANCEL; + } + spin_unlock(¤t->fs->lock); + } + if (!req->work.task_pid) + req->work.task_pid = task_pid_vnr(current); } static inline void io_req_work_drop_env(struct io_kiocb *req) @@ -921,6 +943,16 @@ static inline void io_req_work_drop_env(struct io_kiocb *req) put_cred(req->work.creds); req->work.creds = NULL; } + if (req->work.fs) { + struct fs_struct *fs = req->work.fs; + + spin_lock(&req->work.fs->lock); + if (--fs->users) + fs = NULL; + spin_unlock(&req->work.fs->lock); + if (fs) + free_fs_struct(fs); + } } static inline bool io_prep_async_work(struct io_kiocb *req, @@ -1074,6 +1106,7 @@ static bool io_cqring_overflow_flush(struct io_ring_ctx *ctx, bool force) req = list_first_entry(&ctx->cq_overflow_list, struct io_kiocb, list); list_move(&req->list, &list); + req->flags &= ~REQ_F_OVERFLOW; if (cqe) { WRITE_ONCE(cqe->user_data, req->user_data); WRITE_ONCE(cqe->res, req->result); @@ -1126,6 +1159,7 @@ static void io_cqring_fill_event(struct io_kiocb *req, long res) set_bit(0, &ctx->sq_check_overflow); set_bit(0, &ctx->cq_check_overflow); } + req->flags |= REQ_F_OVERFLOW; refcount_inc(&req->refs); req->result = res; list_add_tail(&req->list, &ctx->cq_overflow_list); @@ -1241,6 +1275,9 @@ static void __io_free_req(struct io_kiocb *req) { __io_req_aux_free(req); + if (req->flags & REQ_F_NEED_CLEANUP) + io_cleanup_req(req); + if (req->flags & REQ_F_INFLIGHT) { struct io_ring_ctx *ctx = req->ctx; unsigned long flags; @@ -2056,9 +2093,6 @@ static ssize_t io_import_iovec(int rw, struct io_kiocb *req, return iorw->size; } - if (!req->has_user) - return -EFAULT; - #ifdef CONFIG_COMPAT if (req->ctx->compat) return compat_import_iovec(rw, buf, sqe_len, UIO_FASTIOV, @@ -2137,6 +2171,8 @@ static void io_req_map_rw(struct io_kiocb *req, ssize_t io_size, req->io->rw.iov = req->io->rw.fast_iov; memcpy(req->io->rw.iov, fast_iov, sizeof(struct iovec) * iter->nr_segs); + } else { + req->flags |= REQ_F_NEED_CLEANUP; } } @@ -2148,17 +2184,6 @@ static int io_alloc_async_ctx(struct io_kiocb *req) return req->io == NULL; } -static void io_rw_async(struct io_wq_work **workptr) -{ - struct io_kiocb *req = container_of(*workptr, struct io_kiocb, work); - struct iovec *iov = NULL; - - if (req->io->rw.iov != req->io->rw.fast_iov) - iov = req->io->rw.iov; - io_wq_submit_work(workptr); - kfree(iov); -} - static int io_setup_async_rw(struct io_kiocb *req, ssize_t io_size, struct iovec *iovec, struct iovec *fast_iov, struct iov_iter *iter) @@ -2171,7 +2196,6 @@ static int io_setup_async_rw(struct io_kiocb *req, ssize_t io_size, io_req_map_rw(req, io_size, iovec, fast_iov, iter); } - req->work.func = io_rw_async; return 0; } @@ -2189,7 +2213,8 @@ static int io_read_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe, if (unlikely(!(req->file->f_mode & FMODE_READ))) return -EBADF; - if (!req->io) + /* either don't need iovec imported or already have it */ + if (!req->io || req->flags & REQ_F_NEED_CLEANUP) return 0; io = req->io; @@ -2258,8 +2283,8 @@ copy_iov: } } out_free: - if (!io_wq_current_is_worker()) - kfree(iovec); + kfree(iovec); + req->flags &= ~REQ_F_NEED_CLEANUP; return ret; } @@ -2277,7 +2302,8 @@ static int io_write_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe, if (unlikely(!(req->file->f_mode & FMODE_WRITE))) return -EBADF; - if (!req->io) + /* either don't need iovec imported or already have it */ + if (!req->io || req->flags & REQ_F_NEED_CLEANUP) return 0; io = req->io; @@ -2352,6 +2378,12 @@ static int io_write(struct io_kiocb *req, struct io_kiocb **nxt, ret2 = call_write_iter(req->file, kiocb, &iter); else ret2 = loop_rw_iter(WRITE, req->file, kiocb, &iter); + /* + * Raw bdev writes will -EOPNOTSUPP for IOCB_NOWAIT. Just + * retry them without IOCB_NOWAIT. + */ + if (ret2 == -EOPNOTSUPP && (kiocb->ki_flags & IOCB_NOWAIT)) + ret2 = -EAGAIN; if (!force_nonblock || ret2 != -EAGAIN) { kiocb_done(kiocb, ret2, nxt, req->in_async); } else { @@ -2364,8 +2396,8 @@ copy_iov: } } out_free: - if (!io_wq_current_is_worker()) - kfree(iovec); + req->flags &= ~REQ_F_NEED_CLEANUP; + kfree(iovec); return ret; } @@ -2534,6 +2566,10 @@ static int io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) if (sqe->ioprio || sqe->buf_index) return -EINVAL; + if (sqe->flags & IOSQE_FIXED_FILE) + return -EBADF; + if (req->flags & REQ_F_NEED_CLEANUP) + return 0; req->open.dfd = READ_ONCE(sqe->fd); req->open.how.mode = READ_ONCE(sqe->len); @@ -2547,6 +2583,7 @@ static int io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) return ret; } + req->flags |= REQ_F_NEED_CLEANUP; return 0; } @@ -2559,6 +2596,10 @@ static int io_openat2_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) if (sqe->ioprio || sqe->buf_index) return -EINVAL; + if (sqe->flags & IOSQE_FIXED_FILE) + return -EBADF; + if (req->flags & REQ_F_NEED_CLEANUP) + return 0; req->open.dfd = READ_ONCE(sqe->fd); fname = u64_to_user_ptr(READ_ONCE(sqe->addr)); @@ -2583,6 +2624,7 @@ static int io_openat2_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) return ret; } + req->flags |= REQ_F_NEED_CLEANUP; return 0; } @@ -2614,6 +2656,7 @@ static int io_openat2(struct io_kiocb *req, struct io_kiocb **nxt, } err: putname(req->open.filename); + req->flags &= ~REQ_F_NEED_CLEANUP; if (ret < 0) req_set_fail_links(req); io_cqring_add_event(req, ret); @@ -2754,6 +2797,10 @@ static int io_statx_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) if (sqe->ioprio || sqe->buf_index) return -EINVAL; + if (sqe->flags & IOSQE_FIXED_FILE) + return -EBADF; + if (req->flags & REQ_F_NEED_CLEANUP) + return 0; req->open.dfd = READ_ONCE(sqe->fd); req->open.mask = READ_ONCE(sqe->len); @@ -2771,6 +2818,7 @@ static int io_statx_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) return ret; } + req->flags |= REQ_F_NEED_CLEANUP; return 0; } @@ -2808,6 +2856,7 @@ retry: ret = cp_statx(&stat, ctx->buffer); err: putname(ctx->filename); + req->flags &= ~REQ_F_NEED_CLEANUP; if (ret < 0) req_set_fail_links(req); io_cqring_add_event(req, ret); @@ -2827,7 +2876,7 @@ static int io_close_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) sqe->rw_flags || sqe->buf_index) return -EINVAL; if (sqe->flags & IOSQE_FIXED_FILE) - return -EINVAL; + return -EBADF; req->close.fd = READ_ONCE(sqe->fd); if (req->file->f_op == &io_uring_fops || @@ -2837,24 +2886,25 @@ static int io_close_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) return 0; } +/* only called when __close_fd_get_file() is done */ +static void __io_close_finish(struct io_kiocb *req, struct io_kiocb **nxt) +{ + int ret; + + ret = filp_close(req->close.put_file, req->work.files); + if (ret < 0) + req_set_fail_links(req); + io_cqring_add_event(req, ret); + fput(req->close.put_file); + io_put_req_find_next(req, nxt); +} + static void io_close_finish(struct io_wq_work **workptr) { struct io_kiocb *req = container_of(*workptr, struct io_kiocb, work); struct io_kiocb *nxt = NULL; - /* Invoked with files, we need to do the close */ - if (req->work.files) { - int ret; - - ret = filp_close(req->close.put_file, req->work.files); - if (ret < 0) - req_set_fail_links(req); - io_cqring_add_event(req, ret); - } - - fput(req->close.put_file); - - io_put_req_find_next(req, &nxt); + __io_close_finish(req, &nxt); if (nxt) io_wq_assign_next(workptr, nxt); } @@ -2877,22 +2927,8 @@ static int io_close(struct io_kiocb *req, struct io_kiocb **nxt, * No ->flush(), safely close from here and just punt the * fput() to async context. */ - ret = filp_close(req->close.put_file, current->files); - - if (ret < 0) - req_set_fail_links(req); - io_cqring_add_event(req, ret); - - if (io_wq_current_is_worker()) { - struct io_wq_work *old_work, *work; - - old_work = work = &req->work; - io_close_finish(&work); - if (work && work != old_work) - *nxt = container_of(work, struct io_kiocb, work); - return 0; - } - + __io_close_finish(req, nxt); + return 0; eagain: req->work.func = io_close_finish; /* @@ -2960,24 +2996,12 @@ static int io_sync_file_range(struct io_kiocb *req, struct io_kiocb **nxt, return 0; } -#if defined(CONFIG_NET) -static void io_sendrecv_async(struct io_wq_work **workptr) -{ - struct io_kiocb *req = container_of(*workptr, struct io_kiocb, work); - struct iovec *iov = NULL; - - if (req->io->rw.iov != req->io->rw.fast_iov) - iov = req->io->msg.iov; - io_wq_submit_work(workptr); - kfree(iov); -} -#endif - static int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { #if defined(CONFIG_NET) struct io_sr_msg *sr = &req->sr_msg; struct io_async_ctx *io = req->io; + int ret; sr->msg_flags = READ_ONCE(sqe->msg_flags); sr->msg = u64_to_user_ptr(READ_ONCE(sqe->addr)); @@ -2985,10 +3009,16 @@ static int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) if (!io || req->opcode == IORING_OP_SEND) return 0; + /* iovec is already imported */ + if (req->flags & REQ_F_NEED_CLEANUP) + return 0; io->msg.iov = io->msg.fast_iov; - return sendmsg_copy_msghdr(&io->msg.msg, sr->msg, sr->msg_flags, + ret = sendmsg_copy_msghdr(&io->msg.msg, sr->msg, sr->msg_flags, &io->msg.iov); + if (!ret) + req->flags |= REQ_F_NEED_CLEANUP; + return ret; #else return -EOPNOTSUPP; #endif @@ -3008,12 +3038,11 @@ static int io_sendmsg(struct io_kiocb *req, struct io_kiocb **nxt, sock = sock_from_file(req->file, &ret); if (sock) { struct io_async_ctx io; - struct sockaddr_storage addr; unsigned flags; if (req->io) { kmsg = &req->io->msg; - kmsg->msg.msg_name = &addr; + kmsg->msg.msg_name = &req->io->msg.addr; /* if iov is set, it's allocated already */ if (!kmsg->iov) kmsg->iov = kmsg->fast_iov; @@ -3022,7 +3051,7 @@ static int io_sendmsg(struct io_kiocb *req, struct io_kiocb **nxt, struct io_sr_msg *sr = &req->sr_msg; kmsg = &io.msg; - kmsg->msg.msg_name = &addr; + kmsg->msg.msg_name = &io.msg.addr; io.msg.iov = io.msg.fast_iov; ret = sendmsg_copy_msghdr(&io.msg.msg, sr->msg, @@ -3041,18 +3070,22 @@ static int io_sendmsg(struct io_kiocb *req, struct io_kiocb **nxt, if (force_nonblock && ret == -EAGAIN) { if (req->io) return -EAGAIN; - if (io_alloc_async_ctx(req)) + if (io_alloc_async_ctx(req)) { + if (kmsg && kmsg->iov != kmsg->fast_iov) + kfree(kmsg->iov); return -ENOMEM; + } + req->flags |= REQ_F_NEED_CLEANUP; memcpy(&req->io->msg, &io.msg, sizeof(io.msg)); - req->work.func = io_sendrecv_async; return -EAGAIN; } if (ret == -ERESTARTSYS) ret = -EINTR; } - if (!io_wq_current_is_worker() && kmsg && kmsg->iov != kmsg->fast_iov) + if (kmsg && kmsg->iov != kmsg->fast_iov) kfree(kmsg->iov); + req->flags &= ~REQ_F_NEED_CLEANUP; io_cqring_add_event(req, ret); if (ret < 0) req_set_fail_links(req); @@ -3120,6 +3153,7 @@ static int io_recvmsg_prep(struct io_kiocb *req, #if defined(CONFIG_NET) struct io_sr_msg *sr = &req->sr_msg; struct io_async_ctx *io = req->io; + int ret; sr->msg_flags = READ_ONCE(sqe->msg_flags); sr->msg = u64_to_user_ptr(READ_ONCE(sqe->addr)); @@ -3127,10 +3161,16 @@ static int io_recvmsg_prep(struct io_kiocb *req, if (!io || req->opcode == IORING_OP_RECV) return 0; + /* iovec is already imported */ + if (req->flags & REQ_F_NEED_CLEANUP) + return 0; io->msg.iov = io->msg.fast_iov; - return recvmsg_copy_msghdr(&io->msg.msg, sr->msg, sr->msg_flags, + ret = recvmsg_copy_msghdr(&io->msg.msg, sr->msg, sr->msg_flags, &io->msg.uaddr, &io->msg.iov); + if (!ret) + req->flags |= REQ_F_NEED_CLEANUP; + return ret; #else return -EOPNOTSUPP; #endif @@ -3150,12 +3190,11 @@ static int io_recvmsg(struct io_kiocb *req, struct io_kiocb **nxt, sock = sock_from_file(req->file, &ret); if (sock) { struct io_async_ctx io; - struct sockaddr_storage addr; unsigned flags; if (req->io) { kmsg = &req->io->msg; - kmsg->msg.msg_name = &addr; + kmsg->msg.msg_name = &req->io->msg.addr; /* if iov is set, it's allocated already */ if (!kmsg->iov) kmsg->iov = kmsg->fast_iov; @@ -3164,7 +3203,7 @@ static int io_recvmsg(struct io_kiocb *req, struct io_kiocb **nxt, struct io_sr_msg *sr = &req->sr_msg; kmsg = &io.msg; - kmsg->msg.msg_name = &addr; + kmsg->msg.msg_name = &io.msg.addr; io.msg.iov = io.msg.fast_iov; ret = recvmsg_copy_msghdr(&io.msg.msg, sr->msg, @@ -3185,18 +3224,22 @@ static int io_recvmsg(struct io_kiocb *req, struct io_kiocb **nxt, if (force_nonblock && ret == -EAGAIN) { if (req->io) return -EAGAIN; - if (io_alloc_async_ctx(req)) + if (io_alloc_async_ctx(req)) { + if (kmsg && kmsg->iov != kmsg->fast_iov) + kfree(kmsg->iov); return -ENOMEM; + } memcpy(&req->io->msg, &io.msg, sizeof(io.msg)); - req->work.func = io_sendrecv_async; + req->flags |= REQ_F_NEED_CLEANUP; return -EAGAIN; } if (ret == -ERESTARTSYS) ret = -EINTR; } - if (!io_wq_current_is_worker() && kmsg && kmsg->iov != kmsg->fast_iov) + if (kmsg && kmsg->iov != kmsg->fast_iov) kfree(kmsg->iov); + req->flags &= ~REQ_F_NEED_CLEANUP; io_cqring_add_event(req, ret); if (ret < 0) req_set_fail_links(req); @@ -4207,6 +4250,35 @@ static int io_req_defer(struct io_kiocb *req, const struct io_uring_sqe *sqe) return -EIOCBQUEUED; } +static void io_cleanup_req(struct io_kiocb *req) +{ + struct io_async_ctx *io = req->io; + + switch (req->opcode) { + case IORING_OP_READV: + case IORING_OP_READ_FIXED: + case IORING_OP_READ: + case IORING_OP_WRITEV: + case IORING_OP_WRITE_FIXED: + case IORING_OP_WRITE: + if (io->rw.iov != io->rw.fast_iov) + kfree(io->rw.iov); + break; + case IORING_OP_SENDMSG: + case IORING_OP_RECVMSG: + if (io->msg.iov != io->msg.fast_iov) + kfree(io->msg.iov); + break; + case IORING_OP_OPENAT: + case IORING_OP_OPENAT2: + case IORING_OP_STATX: + putname(req->open.filename); + break; + } + + req->flags &= ~REQ_F_NEED_CLEANUP; +} + static int io_issue_sqe(struct io_kiocb *req, const struct io_uring_sqe *sqe, struct io_kiocb **nxt, bool force_nonblock) { @@ -4446,7 +4518,6 @@ static void io_wq_submit_work(struct io_wq_work **workptr) } if (!ret) { - req->has_user = (work->flags & IO_WQ_WORK_HAS_MM) != 0; req->in_async = true; do { ret = io_issue_sqe(req, NULL, &nxt, false); @@ -4479,7 +4550,7 @@ static int io_req_needs_file(struct io_kiocb *req, int fd) { if (!io_op_defs[req->opcode].needs_file) return 0; - if (fd == -1 && io_op_defs[req->opcode].fd_non_neg) + if ((fd == -1 || fd == AT_FDCWD) && io_op_defs[req->opcode].fd_non_neg) return 0; return 1; } @@ -4950,6 +5021,7 @@ static int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr, for (i = 0; i < nr; i++) { const struct io_uring_sqe *sqe; struct io_kiocb *req; + int err; req = io_get_req(ctx, statep); if (unlikely(!req)) { @@ -4966,20 +5038,23 @@ static int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr, submitted++; if (unlikely(req->opcode >= IORING_OP_LAST)) { - io_cqring_add_event(req, -EINVAL); + err = -EINVAL; +fail_req: + io_cqring_add_event(req, err); io_double_put_req(req); break; } if (io_op_defs[req->opcode].needs_mm && !*mm) { mm_fault = mm_fault || !mmget_not_zero(ctx->sqo_mm); - if (!mm_fault) { - use_mm(ctx->sqo_mm); - *mm = ctx->sqo_mm; + if (unlikely(mm_fault)) { + err = -EFAULT; + goto fail_req; } + use_mm(ctx->sqo_mm); + *mm = ctx->sqo_mm; } - req->has_user = *mm != NULL; req->in_async = async; req->needs_fixed_file = async; trace_io_uring_submit_sqe(ctx, req->opcode, req->user_data, @@ -6301,7 +6376,7 @@ static __poll_t io_uring_poll(struct file *file, poll_table *wait) if (READ_ONCE(ctx->rings->sq.tail) - ctx->cached_sq_head != ctx->rings->sq_ring_entries) mask |= EPOLLOUT | EPOLLWRNORM; - if (READ_ONCE(ctx->rings->cq.head) != ctx->cached_cq_tail) + if (io_cqring_events(ctx, false)) mask |= EPOLLIN | EPOLLRDNORM; return mask; @@ -6393,6 +6468,29 @@ static void io_uring_cancel_files(struct io_ring_ctx *ctx, if (!cancel_req) break; + if (cancel_req->flags & REQ_F_OVERFLOW) { + spin_lock_irq(&ctx->completion_lock); + list_del(&cancel_req->list); + cancel_req->flags &= ~REQ_F_OVERFLOW; + if (list_empty(&ctx->cq_overflow_list)) { + clear_bit(0, &ctx->sq_check_overflow); + clear_bit(0, &ctx->cq_check_overflow); + } + spin_unlock_irq(&ctx->completion_lock); + + WRITE_ONCE(ctx->rings->cq_overflow, + atomic_inc_return(&ctx->cached_cq_overflow)); + + /* + * Put inflight ref and overflow ref. If that's + * all we had, then we're done with this request. + */ + if (refcount_sub_and_test(2, &cancel_req->refs)) { + io_put_req(cancel_req); + continue; + } + } + io_wq_cancel_work(ctx->io_wq, &cancel_req->work); io_put_req(cancel_req); schedule(); @@ -6405,6 +6503,13 @@ static int io_uring_flush(struct file *file, void *data) struct io_ring_ctx *ctx = file->private_data; io_uring_cancel_files(ctx, data); + + /* + * If the task is going away, cancel work it may have pending + */ + if (fatal_signal_pending(current) || (current->flags & PF_EXITING)) + io_wq_cancel_pid(ctx->io_wq, task_pid_vnr(current)); + return 0; } diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c index 2494095e0340..27373f5792a4 100644 --- a/fs/jbd2/commit.c +++ b/fs/jbd2/commit.c @@ -976,29 +976,33 @@ restart_loop: * it. */ /* - * A buffer which has been freed while still being journaled by - * a previous transaction. - */ - if (buffer_freed(bh)) { + * A buffer which has been freed while still being journaled + * by a previous transaction, refile the buffer to BJ_Forget of + * the running transaction. If the just committed transaction + * contains "add to orphan" operation, we can completely + * invalidate the buffer now. We are rather through in that + * since the buffer may be still accessible when blocksize < + * pagesize and it is attached to the last partial page. + */ + if (buffer_freed(bh) && !jh->b_next_transaction) { + struct address_space *mapping; + + clear_buffer_freed(bh); + clear_buffer_jbddirty(bh); + /* - * If the running transaction is the one containing - * "add to orphan" operation (b_next_transaction != - * NULL), we have to wait for that transaction to - * commit before we can really get rid of the buffer. - * So just clear b_modified to not confuse transaction - * credit accounting and refile the buffer to - * BJ_Forget of the running transaction. If the just - * committed transaction contains "add to orphan" - * operation, we can completely invalidate the buffer - * now. We are rather through in that since the - * buffer may be still accessible when blocksize < - * pagesize and it is attached to the last partial - * page. + * Block device buffers need to stay mapped all the + * time, so it is enough to clear buffer_jbddirty and + * buffer_freed bits. For the file mapping buffers (i.e. + * journalled data) we need to unmap buffer and clear + * more bits. We also need to be careful about the check + * because the data page mapping can get cleared under + * out hands, which alse need not to clear more bits + * because the page and buffers will be freed and can + * never be reused once we are done with them. */ - jh->b_modified = 0; - if (!jh->b_next_transaction) { - clear_buffer_freed(bh); - clear_buffer_jbddirty(bh); + mapping = READ_ONCE(bh->b_page->mapping); + if (mapping && !sb_is_blkdev_sb(mapping->host->i_sb)) { clear_buffer_mapped(bh); clear_buffer_new(bh); clear_buffer_req(bh); diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index e77a5a0b4e46..2dd848a743ed 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -2329,14 +2329,16 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh, return -EBUSY; } /* - * OK, buffer won't be reachable after truncate. We just set - * j_next_transaction to the running transaction (if there is - * one) and mark buffer as freed so that commit code knows it - * should clear dirty bits when it is done with the buffer. + * OK, buffer won't be reachable after truncate. We just clear + * b_modified to not confuse transaction credit accounting, and + * set j_next_transaction to the running transaction (if there + * is one) and mark buffer as freed so that commit code knows + * it should clear dirty bits when it is done with the buffer. */ set_buffer_freed(bh); if (journal->j_running_transaction && buffer_jbddirty(bh)) jh->b_next_transaction = journal->j_running_transaction; + jh->b_modified = 0; spin_unlock(&journal->j_list_lock); spin_unlock(&jh->b_state_lock); write_unlock(&journal->j_state_lock); diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index 4a841071d8a7..1865322de142 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -42,13 +42,27 @@ static void nfs_mark_delegation_revoked(struct nfs_delegation *delegation) if (!test_and_set_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) { delegation->stateid.type = NFS4_INVALID_STATEID_TYPE; atomic_long_dec(&nfs_active_delegations); + if (!test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) + nfs_clear_verifier_delegated(delegation->inode); } } +static struct nfs_delegation *nfs_get_delegation(struct nfs_delegation *delegation) +{ + refcount_inc(&delegation->refcount); + return delegation; +} + +static void nfs_put_delegation(struct nfs_delegation *delegation) +{ + if (refcount_dec_and_test(&delegation->refcount)) + __nfs_free_delegation(delegation); +} + static void nfs_free_delegation(struct nfs_delegation *delegation) { nfs_mark_delegation_revoked(delegation); - __nfs_free_delegation(delegation); + nfs_put_delegation(delegation); } /** @@ -241,13 +255,18 @@ void nfs_inode_reclaim_delegation(struct inode *inode, const struct cred *cred, static int nfs_do_return_delegation(struct inode *inode, struct nfs_delegation *delegation, int issync) { + const struct cred *cred; int res = 0; - if (!test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) - res = nfs4_proc_delegreturn(inode, - delegation->cred, + if (!test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) { + spin_lock(&delegation->lock); + cred = get_cred(delegation->cred); + spin_unlock(&delegation->lock); + res = nfs4_proc_delegreturn(inode, cred, &delegation->stateid, issync); + put_cred(cred); + } return res; } @@ -273,9 +292,13 @@ nfs_start_delegation_return_locked(struct nfs_inode *nfsi) if (delegation == NULL) goto out; spin_lock(&delegation->lock); - if (!test_and_set_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) - ret = delegation; + if (!test_and_set_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) { + /* Refcount matched in nfs_end_delegation_return() */ + ret = nfs_get_delegation(delegation); + } spin_unlock(&delegation->lock); + if (ret) + nfs_clear_verifier_delegated(&nfsi->vfs_inode); out: return ret; } @@ -393,6 +416,7 @@ int nfs_inode_set_delegation(struct inode *inode, const struct cred *cred, if (delegation == NULL) return -ENOMEM; nfs4_stateid_copy(&delegation->stateid, stateid); + refcount_set(&delegation->refcount, 1); delegation->type = type; delegation->pagemod_limit = pagemod_limit; delegation->change_attr = inode_peek_iversion_raw(inode); @@ -492,6 +516,8 @@ static int nfs_end_delegation_return(struct inode *inode, struct nfs_delegation err = nfs_do_return_delegation(inode, delegation, issync); out: + /* Refcount matched in nfs_start_delegation_return_locked() */ + nfs_put_delegation(delegation); return err; } @@ -686,9 +712,12 @@ void nfs4_inode_return_delegation_on_close(struct inode *inode) list_empty(&NFS_I(inode)->open_files) && !test_and_set_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) { clear_bit(NFS_DELEGATION_RETURN_IF_CLOSED, &delegation->flags); - ret = delegation; + /* Refcount matched in nfs_end_delegation_return() */ + ret = nfs_get_delegation(delegation); } spin_unlock(&delegation->lock); + if (ret) + nfs_clear_verifier_delegated(inode); } out: rcu_read_unlock(); @@ -1088,10 +1117,11 @@ restart: delegation = nfs_start_delegation_return_locked(NFS_I(inode)); rcu_read_unlock(); if (delegation != NULL) { - delegation = nfs_detach_delegation(NFS_I(inode), - delegation, server); - if (delegation != NULL) + if (nfs_detach_delegation(NFS_I(inode), delegation, + server) != NULL) nfs_free_delegation(delegation); + /* Match nfs_start_delegation_return_locked */ + nfs_put_delegation(delegation); } iput(inode); nfs_sb_deactive(server->super); diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h index 31b84604d383..9b00a0b7f832 100644 --- a/fs/nfs/delegation.h +++ b/fs/nfs/delegation.h @@ -22,6 +22,7 @@ struct nfs_delegation { unsigned long pagemod_limit; __u64 change_attr; unsigned long flags; + refcount_t refcount; spinlock_t lock; struct rcu_head rcu; }; diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 1320288ff9ec..193d6fb363b7 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -155,6 +155,7 @@ typedef struct { loff_t current_index; decode_dirent_t decode; + unsigned long dir_verifier; unsigned long timestamp; unsigned long gencount; unsigned int cache_entry_index; @@ -353,6 +354,7 @@ int nfs_readdir_xdr_filler(struct page **pages, nfs_readdir_descriptor_t *desc, again: timestamp = jiffies; gencount = nfs_inc_attr_generation_counter(); + desc->dir_verifier = nfs_save_change_attribute(inode); error = NFS_PROTO(inode)->readdir(file_dentry(file), cred, entry->cookie, pages, NFS_SERVER(inode)->dtsize, desc->plus); if (error < 0) { @@ -455,13 +457,13 @@ void nfs_force_use_readdirplus(struct inode *dir) } static -void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry) +void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry, + unsigned long dir_verifier) { struct qstr filename = QSTR_INIT(entry->name, entry->len); DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); struct dentry *dentry; struct dentry *alias; - struct inode *dir = d_inode(parent); struct inode *inode; int status; @@ -500,7 +502,7 @@ again: if (nfs_same_file(dentry, entry)) { if (!entry->fh->size) goto out; - nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); + nfs_set_verifier(dentry, dir_verifier); status = nfs_refresh_inode(d_inode(dentry), entry->fattr); if (!status) nfs_setsecurity(d_inode(dentry), entry->fattr, entry->label); @@ -526,7 +528,7 @@ again: dput(dentry); dentry = alias; } - nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); + nfs_set_verifier(dentry, dir_verifier); out: dput(dentry); } @@ -564,7 +566,8 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en count++; if (desc->plus) - nfs_prime_dcache(file_dentry(desc->file), entry); + nfs_prime_dcache(file_dentry(desc->file), entry, + desc->dir_verifier); status = nfs_readdir_add_to_array(entry, page); if (status != 0) @@ -983,14 +986,113 @@ static int nfs_fsync_dir(struct file *filp, loff_t start, loff_t end, * full lookup on all child dentries of 'dir' whenever a change occurs * on the server that might have invalidated our dcache. * + * Note that we reserve bit '0' as a tag to let us know when a dentry + * was revalidated while holding a delegation on its inode. + * * The caller should be holding dir->i_lock */ void nfs_force_lookup_revalidate(struct inode *dir) { - NFS_I(dir)->cache_change_attribute++; + NFS_I(dir)->cache_change_attribute += 2; } EXPORT_SYMBOL_GPL(nfs_force_lookup_revalidate); +/** + * nfs_verify_change_attribute - Detects NFS remote directory changes + * @dir: pointer to parent directory inode + * @verf: previously saved change attribute + * + * Return "false" if the verifiers doesn't match the change attribute. + * This would usually indicate that the directory contents have changed on + * the server, and that any dentries need revalidating. + */ +static bool nfs_verify_change_attribute(struct inode *dir, unsigned long verf) +{ + return (verf & ~1UL) == nfs_save_change_attribute(dir); +} + +static void nfs_set_verifier_delegated(unsigned long *verf) +{ + *verf |= 1UL; +} + +#if IS_ENABLED(CONFIG_NFS_V4) +static void nfs_unset_verifier_delegated(unsigned long *verf) +{ + *verf &= ~1UL; +} +#endif /* IS_ENABLED(CONFIG_NFS_V4) */ + +static bool nfs_test_verifier_delegated(unsigned long verf) +{ + return verf & 1; +} + +static bool nfs_verifier_is_delegated(struct dentry *dentry) +{ + return nfs_test_verifier_delegated(dentry->d_time); +} + +static void nfs_set_verifier_locked(struct dentry *dentry, unsigned long verf) +{ + struct inode *inode = d_inode(dentry); + + if (!nfs_verifier_is_delegated(dentry) && + !nfs_verify_change_attribute(d_inode(dentry->d_parent), verf)) + goto out; + if (inode && NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) + nfs_set_verifier_delegated(&verf); +out: + dentry->d_time = verf; +} + +/** + * nfs_set_verifier - save a parent directory verifier in the dentry + * @dentry: pointer to dentry + * @verf: verifier to save + * + * Saves the parent directory verifier in @dentry. If the inode has + * a delegation, we also tag the dentry as having been revalidated + * while holding a delegation so that we know we don't have to + * look it up again after a directory change. + */ +void nfs_set_verifier(struct dentry *dentry, unsigned long verf) +{ + + spin_lock(&dentry->d_lock); + nfs_set_verifier_locked(dentry, verf); + spin_unlock(&dentry->d_lock); +} +EXPORT_SYMBOL_GPL(nfs_set_verifier); + +#if IS_ENABLED(CONFIG_NFS_V4) +/** + * nfs_clear_verifier_delegated - clear the dir verifier delegation tag + * @inode: pointer to inode + * + * Iterates through the dentries in the inode alias list and clears + * the tag used to indicate that the dentry has been revalidated + * while holding a delegation. + * This function is intended for use when the delegation is being + * returned or revoked. + */ +void nfs_clear_verifier_delegated(struct inode *inode) +{ + struct dentry *alias; + + if (!inode) + return; + spin_lock(&inode->i_lock); + hlist_for_each_entry(alias, &inode->i_dentry, d_u.d_alias) { + spin_lock(&alias->d_lock); + nfs_unset_verifier_delegated(&alias->d_time); + spin_unlock(&alias->d_lock); + } + spin_unlock(&inode->i_lock); +} +EXPORT_SYMBOL_GPL(nfs_clear_verifier_delegated); +#endif /* IS_ENABLED(CONFIG_NFS_V4) */ + /* * A check for whether or not the parent directory has changed. * In the case it has, we assume that the dentries are untrustworthy @@ -1159,6 +1261,7 @@ nfs_lookup_revalidate_dentry(struct inode *dir, struct dentry *dentry, struct nfs_fh *fhandle; struct nfs_fattr *fattr; struct nfs4_label *label; + unsigned long dir_verifier; int ret; ret = -ENOMEM; @@ -1168,6 +1271,7 @@ nfs_lookup_revalidate_dentry(struct inode *dir, struct dentry *dentry, if (fhandle == NULL || fattr == NULL || IS_ERR(label)) goto out; + dir_verifier = nfs_save_change_attribute(dir); ret = NFS_PROTO(dir)->lookup(dir, dentry, fhandle, fattr, label); if (ret < 0) { switch (ret) { @@ -1188,7 +1292,7 @@ nfs_lookup_revalidate_dentry(struct inode *dir, struct dentry *dentry, goto out; nfs_setsecurity(inode, fattr, label); - nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); + nfs_set_verifier(dentry, dir_verifier); /* set a readdirplus hint that we had a cache miss */ nfs_force_use_readdirplus(dir); @@ -1230,7 +1334,7 @@ nfs_do_lookup_revalidate(struct inode *dir, struct dentry *dentry, goto out_bad; } - if (NFS_PROTO(dir)->have_delegation(inode, FMODE_READ)) + if (nfs_verifier_is_delegated(dentry)) return nfs_lookup_revalidate_delegated(dir, dentry, inode); /* Force a full look up iff the parent directory has changed */ @@ -1415,6 +1519,7 @@ struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned in struct nfs_fh *fhandle = NULL; struct nfs_fattr *fattr = NULL; struct nfs4_label *label = NULL; + unsigned long dir_verifier; int error; dfprintk(VFS, "NFS: lookup(%pd2)\n", dentry); @@ -1440,6 +1545,7 @@ struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned in if (IS_ERR(label)) goto out; + dir_verifier = nfs_save_change_attribute(dir); trace_nfs_lookup_enter(dir, dentry, flags); error = NFS_PROTO(dir)->lookup(dir, dentry, fhandle, fattr, label); if (error == -ENOENT) @@ -1463,7 +1569,7 @@ no_entry: goto out_label; dentry = res; } - nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); + nfs_set_verifier(dentry, dir_verifier); out_label: trace_nfs_lookup_exit(dir, dentry, flags, error); nfs4_label_free(label); @@ -1668,7 +1774,7 @@ nfs4_do_lookup_revalidate(struct inode *dir, struct dentry *dentry, if (inode == NULL) goto full_reval; - if (NFS_PROTO(dir)->have_delegation(inode, FMODE_READ)) + if (nfs_verifier_is_delegated(dentry)) return nfs_lookup_revalidate_delegated(dir, dentry, inode); /* NFS only supports OPEN on regular files */ diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 1309e6f47f3d..11bf15800ac9 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -2114,6 +2114,7 @@ static void init_once(void *foo) init_rwsem(&nfsi->rmdir_sem); mutex_init(&nfsi->commit_mutex); nfs4_init_once(nfsi); + nfsi->cache_change_attribute = 0; } static int __init nfs_init_inodecache(void) diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index be4eb720d5b6..1297919e0fce 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -87,7 +87,6 @@ nfs4_file_open(struct inode *inode, struct file *filp) if (inode != d_inode(dentry)) goto out_drop; - nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); nfs_file_set_open_context(filp, ctx); nfs_fscache_open_file(inode, filp); err = 0; diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 95d07a3dc5d1..69b7ab7a5815 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -2974,10 +2974,13 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, struct dentry *dentry; struct nfs4_state *state; fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); + struct inode *dir = d_inode(opendata->dir); + unsigned long dir_verifier; unsigned int seq; int ret; seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); + dir_verifier = nfs_save_change_attribute(dir); ret = _nfs4_proc_open(opendata, ctx); if (ret != 0) @@ -3005,8 +3008,19 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, dput(ctx->dentry); ctx->dentry = dentry = alias; } - nfs_set_verifier(dentry, - nfs_save_change_attribute(d_inode(opendata->dir))); + } + + switch(opendata->o_arg.claim) { + default: + break; + case NFS4_OPEN_CLAIM_NULL: + case NFS4_OPEN_CLAIM_DELEGATE_CUR: + case NFS4_OPEN_CLAIM_DELEGATE_PREV: + if (!opendata->rpc_done) + break; + if (opendata->o_res.delegation_type != 0) + dir_verifier = nfs_save_change_attribute(dir); + nfs_set_verifier(dentry, dir_verifier); } /* Parse layoutget results before we check for access */ @@ -5322,7 +5336,7 @@ static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, hdr->timestamp = jiffies; msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; - nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1, 0); + nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr); } diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 3a688eb5c5ae..58e937be24ce 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -587,7 +587,7 @@ xfs_dax_writepages( xfs_iflags_clear(ip, XFS_ITRUNCATED); return dax_writeback_mapping_range(mapping, - xfs_inode_buftarg(ip)->bt_bdev, wbc); + xfs_inode_buftarg(ip)->bt_daxdev, wbc); } STATIC sector_t diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h index 00994b1b8681..5867777bb7d0 100644 --- a/include/acpi/acpixf.h +++ b/include/acpi/acpixf.h @@ -752,6 +752,7 @@ ACPI_HW_DEPENDENT_RETURN_UINT32(u32 acpi_dispatch_gpe(acpi_handle gpe_device, u3 ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_disable_all_gpes(void)) ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_enable_all_runtime_gpes(void)) ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_enable_all_wakeup_gpes(void)) +ACPI_HW_DEPENDENT_RETURN_UINT32(u32 acpi_any_gpe_status_set(void)) ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_get_gpe_device(u32 gpe_index, diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 018dce868de6..0fb561d1b524 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -201,9 +201,6 @@ static inline bool policy_is_shared(struct cpufreq_policy *policy) return cpumask_weight(policy->cpus) > 1; } -/* /sys/devices/system/cpu/cpufreq: entry point for global variables */ -extern struct kobject *cpufreq_global_kobject; - #ifdef CONFIG_CPU_FREQ unsigned int cpufreq_get(unsigned int cpu); unsigned int cpufreq_quick_get(unsigned int cpu); diff --git a/include/linux/dax.h b/include/linux/dax.h index 9bd8528bd305..328c2dbb4409 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -129,11 +129,6 @@ static inline bool generic_fsdax_supported(struct dax_device *dax_dev, sectors); } -static inline struct dax_device *fs_dax_get_by_host(const char *host) -{ - return dax_get_by_host(host); -} - static inline void fs_put_dax(struct dax_device *dax_dev) { put_dax(dax_dev); @@ -141,7 +136,7 @@ static inline void fs_put_dax(struct dax_device *dax_dev) struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev); int dax_writeback_mapping_range(struct address_space *mapping, - struct block_device *bdev, struct writeback_control *wbc); + struct dax_device *dax_dev, struct writeback_control *wbc); struct page *dax_layout_busy_page(struct address_space *mapping); dax_entry_t dax_lock_page(struct page *page); @@ -160,11 +155,6 @@ static inline bool generic_fsdax_supported(struct dax_device *dax_dev, return false; } -static inline struct dax_device *fs_dax_get_by_host(const char *host) -{ - return NULL; -} - static inline void fs_put_dax(struct dax_device *dax_dev) { } @@ -180,7 +170,7 @@ static inline struct page *dax_layout_busy_page(struct address_space *mapping) } static inline int dax_writeback_mapping_range(struct address_space *mapping, - struct block_device *bdev, struct writeback_control *wbc) + struct dax_device *dax_dev, struct writeback_control *wbc) { return -EOPNOTSUPP; } diff --git a/include/linux/icmpv6.h b/include/linux/icmpv6.h index ef1cbb5f454f..93338fd54af8 100644 --- a/include/linux/icmpv6.h +++ b/include/linux/icmpv6.h @@ -31,6 +31,12 @@ static inline void icmpv6_send(struct sk_buff *skb, } #endif +#if IS_ENABLED(CONFIG_NF_NAT) +void icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info); +#else +#define icmpv6_ndo_send icmpv6_send +#endif + extern int icmpv6_init(void); extern int icmpv6_err_convert(u8 type, u8 code, int *err); diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index a9c6b5c61d27..9f1f633235f6 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1616,6 +1616,7 @@ enum netdev_priv_flags { * and drivers will need to set them appropriately. * * @mpls_features: Mask of features inheritable by MPLS + * @gso_partial_features: value(s) from NETIF_F_GSO\* * * @ifindex: interface index * @group: The group the device belongs to @@ -1640,8 +1641,11 @@ enum netdev_priv_flags { * @netdev_ops: Includes several pointers to callbacks, * if one wants to override the ndo_*() functions * @ethtool_ops: Management operations + * @l3mdev_ops: Layer 3 master device operations * @ndisc_ops: Includes callbacks for different IPv6 neighbour * discovery handling. Necessary for e.g. 6LoWPAN. + * @xfrmdev_ops: Transformation offload operations + * @tlsdev_ops: Transport Layer Security offload operations * @header_ops: Includes callbacks for creating,parsing,caching,etc * of Layer 2 headers. * @@ -1680,6 +1684,7 @@ enum netdev_priv_flags { * @dev_port: Used to differentiate devices that share * the same function * @addr_list_lock: XXX: need comments on this one + * @name_assign_type: network interface name assignment type * @uc_promisc: Counter that indicates promiscuous mode * has been enabled due to the need to listen to * additional unicast addresses in a device that @@ -1702,6 +1707,9 @@ enum netdev_priv_flags { * @ip6_ptr: IPv6 specific data * @ax25_ptr: AX.25 specific data * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering + * @ieee802154_ptr: IEEE 802.15.4 low-rate Wireless Personal Area Network + * device struct + * @mpls_ptr: mpls_dev struct pointer * * @dev_addr: Hw address (before bcast, * because most packets are unicast) @@ -1710,6 +1718,8 @@ enum netdev_priv_flags { * @num_rx_queues: Number of RX queues * allocated at register_netdev() time * @real_num_rx_queues: Number of RX queues currently active in device + * @xdp_prog: XDP sockets filter program pointer + * @gro_flush_timeout: timeout for GRO layer in NAPI * * @rx_handler: handler for received packets * @rx_handler_data: XXX: need comments on this one @@ -1731,10 +1741,14 @@ enum netdev_priv_flags { * @qdisc: Root qdisc from userspace point of view * @tx_queue_len: Max frames per queue allowed * @tx_global_lock: XXX: need comments on this one + * @xdp_bulkq: XDP device bulk queue + * @xps_cpus_map: all CPUs map for XPS device + * @xps_rxqs_map: all RXQs map for XPS device * * @xps_maps: XXX: need comments on this one * @miniq_egress: clsact qdisc specific data for * egress processing + * @qdisc_hash: qdisc hash table * @watchdog_timeo: Represents the timeout that is used by * the watchdog (see dev_watchdog()) * @watchdog_timer: List of timers @@ -3548,7 +3562,7 @@ static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp, } /** - * netif_attrmask_next_and - get the next CPU/Rx queue in *src1p & *src2p + * netif_attrmask_next_and - get the next CPU/Rx queue in \*src1p & \*src2p * @n: CPU/Rx queue index * @src1p: the first CPUs/Rx queues mask pointer * @src2p: the second CPUs/Rx queues mask pointer diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index a5f8f03ecd59..5d5b91e54f73 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -337,35 +337,17 @@ static inline int nfs_server_capable(struct inode *inode, int cap) return NFS_SERVER(inode)->caps & cap; } -static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf) -{ - dentry->d_time = verf; -} - /** * nfs_save_change_attribute - Returns the inode attribute change cookie * @dir - pointer to parent directory inode - * The "change attribute" is updated every time we finish an operation - * that will result in a metadata change on the server. + * The "cache change attribute" is updated when we need to revalidate + * our dentry cache after a directory was seen to change on the server. */ static inline unsigned long nfs_save_change_attribute(struct inode *dir) { return NFS_I(dir)->cache_change_attribute; } -/** - * nfs_verify_change_attribute - Detects NFS remote directory changes - * @dir - pointer to parent directory inode - * @chattr - previously saved change attribute - * Return "false" if the verifiers doesn't match the change attribute. - * This would usually indicate that the directory contents have changed on - * the server, and that any dentries need revalidating. - */ -static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr) -{ - return chattr == NFS_I(dir)->cache_change_attribute; -} - /* * linux/fs/nfs/inode.c */ @@ -495,6 +477,10 @@ extern const struct file_operations nfs_dir_operations; extern const struct dentry_operations nfs_dentry_operations; extern void nfs_force_lookup_revalidate(struct inode *dir); +extern void nfs_set_verifier(struct dentry * dentry, unsigned long verf); +#if IS_ENABLED(CONFIG_NFS_V4) +extern void nfs_clear_verifier_delegated(struct inode *inode); +#endif /* IS_ENABLED(CONFIG_NFS_V4) */ extern struct dentry *nfs_add_or_obtain(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label); diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h index d5765039652a..ae58fad7f1e0 100644 --- a/include/linux/pipe_fs_i.h +++ b/include/linux/pipe_fs_i.h @@ -29,7 +29,8 @@ struct pipe_buffer { /** * struct pipe_inode_info - a linux kernel pipe * @mutex: mutex protecting the whole thing - * @wait: reader/writer wait point in case of empty/full pipe + * @rd_wait: reader wait point in case of empty pipe + * @wr_wait: writer wait point in case of full pipe * @head: The point of buffer production * @tail: The point of buffer consumption * @max_usage: The maximum number of slots that may be used in the ring diff --git a/include/linux/sched/nohz.h b/include/linux/sched/nohz.h index 1abe91ff6e4a..6d67e9a5af6b 100644 --- a/include/linux/sched/nohz.h +++ b/include/linux/sched/nohz.h @@ -15,9 +15,11 @@ static inline void nohz_balance_enter_idle(int cpu) { } #ifdef CONFIG_NO_HZ_COMMON void calc_load_nohz_start(void); +void calc_load_nohz_remote(struct rq *rq); void calc_load_nohz_stop(void); #else static inline void calc_load_nohz_start(void) { } +static inline void calc_load_nohz_remote(struct rq *rq) { } static inline void calc_load_nohz_stop(void) { } #endif /* CONFIG_NO_HZ_COMMON */ diff --git a/include/linux/suspend.h b/include/linux/suspend.h index 4a230c2f1c31..2b2055b035ee 100644 --- a/include/linux/suspend.h +++ b/include/linux/suspend.h @@ -191,7 +191,7 @@ struct platform_s2idle_ops { int (*begin)(void); int (*prepare)(void); int (*prepare_late)(void); - void (*wake)(void); + bool (*wake)(void); void (*restore_early)(void); void (*restore)(void); void (*end)(void); diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h index af2c85d3a1dd..6c7a10a6d71e 100644 --- a/include/linux/trace_events.h +++ b/include/linux/trace_events.h @@ -440,7 +440,7 @@ struct synth_event_trace_state { struct synth_event *event; unsigned int cur_field; unsigned int n_u64; - bool enabled; + bool disabled; bool add_next; bool add_name; }; diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h index d93017a7ce5c..e9391e877f9a 100644 --- a/include/net/flow_dissector.h +++ b/include/net/flow_dissector.h @@ -33,7 +33,6 @@ enum flow_dissect_ret { /** * struct flow_dissector_key_basic: - * @thoff: Transport header offset * @n_proto: Network header protocol (eg. IPv4/IPv6) * @ip_proto: Transport header protocol (eg. TCP/UDP) */ diff --git a/include/net/icmp.h b/include/net/icmp.h index 5d4bfdba9adf..9ac2d2672a93 100644 --- a/include/net/icmp.h +++ b/include/net/icmp.h @@ -43,6 +43,12 @@ static inline void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 __icmp_send(skb_in, type, code, info, &IPCB(skb_in)->opt); } +#if IS_ENABLED(CONFIG_NF_NAT) +void icmp_ndo_send(struct sk_buff *skb_in, int type, int code, __be32 info); +#else +#define icmp_ndo_send icmp_send +#endif + int icmp_rcv(struct sk_buff *skb); int icmp_err(struct sk_buff *skb, u32 info); int icmp_init(void); diff --git a/include/net/mac80211.h b/include/net/mac80211.h index aa145808e57a..77e6b5a83b06 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -1004,12 +1004,11 @@ ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) struct ieee80211_tx_info { /* common information */ u32 flags; - u8 band; - - u8 hw_queue; - - u16 ack_frame_id:6; - u16 tx_time_est:10; + u32 band:3, + ack_frame_id:13, + hw_queue:4, + tx_time_est:10; + /* 2 free bits */ union { struct { diff --git a/init/Kconfig b/init/Kconfig index cfee56c151f1..452bc1835cd4 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1227,7 +1227,6 @@ endif config BOOT_CONFIG bool "Boot config support" depends on BLK_DEV_INITRD - select LIBXBC default y help Extra boot config allows system admin to pass a config file as diff --git a/init/main.c b/init/main.c index cc0ee4873419..f95b014a5479 100644 --- a/init/main.c +++ b/init/main.c @@ -142,6 +142,15 @@ static char *extra_command_line; /* Extra init arguments */ static char *extra_init_args; +#ifdef CONFIG_BOOT_CONFIG +/* Is bootconfig on command line? */ +static bool bootconfig_found; +static bool initargs_found; +#else +# define bootconfig_found false +# define initargs_found false +#endif + static char *execute_command; static char *ramdisk_execute_command; @@ -336,17 +345,30 @@ u32 boot_config_checksum(unsigned char *p, u32 size) return ret; } +static int __init bootconfig_params(char *param, char *val, + const char *unused, void *arg) +{ + if (strcmp(param, "bootconfig") == 0) { + bootconfig_found = true; + } else if (strcmp(param, "--") == 0) { + initargs_found = true; + } + return 0; +} + static void __init setup_boot_config(const char *cmdline) { + static char tmp_cmdline[COMMAND_LINE_SIZE] __initdata; u32 size, csum; char *data, *copy; - const char *p; u32 *hdr; int ret; - p = strstr(cmdline, "bootconfig"); - if (!p || (p != cmdline && !isspace(*(p-1))) || - (p[10] && !isspace(p[10]))) + strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE); + parse_args("bootconfig", tmp_cmdline, NULL, 0, 0, 0, NULL, + bootconfig_params); + + if (!bootconfig_found) return; if (!initrd_end) @@ -562,11 +584,12 @@ static void __init setup_command_line(char *command_line) * to init. */ len = strlen(saved_command_line); - if (!strstr(boot_command_line, " -- ")) { + if (initargs_found) { + saved_command_line[len++] = ' '; + } else { strcpy(saved_command_line + len, " -- "); len += 4; - } else - saved_command_line[len++] = ' '; + } strcpy(saved_command_line + len, extra_init_args); } diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index db552b9f9377..75f687301bbf 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -5927,11 +5927,14 @@ void cgroup_post_fork(struct task_struct *child) spin_lock_irq(&css_set_lock); - WARN_ON_ONCE(!list_empty(&child->cg_list)); - cset = task_css_set(current); /* current is @child's parent */ - get_css_set(cset); - cset->nr_tasks++; - css_set_move_task(child, NULL, cset, false); + /* init tasks are special, only link regular threads */ + if (likely(child->pid)) { + WARN_ON_ONCE(!list_empty(&child->cg_list)); + cset = task_css_set(current); /* current is @child's parent */ + get_css_set(cset); + cset->nr_tasks++; + css_set_move_task(child, NULL, cset, false); + } /* * If the cgroup has to be frozen, the new task has too. Let's set diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c index 2c47280fbfc7..8b1bb5ee7e5d 100644 --- a/kernel/power/suspend.c +++ b/kernel/power/suspend.c @@ -131,11 +131,12 @@ static void s2idle_loop(void) * to avoid them upfront. */ for (;;) { - if (s2idle_ops && s2idle_ops->wake) - s2idle_ops->wake(); - - if (pm_wakeup_pending()) + if (s2idle_ops && s2idle_ops->wake) { + if (s2idle_ops->wake()) + break; + } else if (pm_wakeup_pending()) { break; + } pm_wakeup_clear(false); diff --git a/kernel/sched/core.c b/kernel/sched/core.c index fc1dfc007604..1a9983da4408 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -552,27 +552,32 @@ void resched_cpu(int cpu) */ int get_nohz_timer_target(void) { - int i, cpu = smp_processor_id(); + int i, cpu = smp_processor_id(), default_cpu = -1; struct sched_domain *sd; - if (!idle_cpu(cpu) && housekeeping_cpu(cpu, HK_FLAG_TIMER)) - return cpu; + if (housekeeping_cpu(cpu, HK_FLAG_TIMER)) { + if (!idle_cpu(cpu)) + return cpu; + default_cpu = cpu; + } rcu_read_lock(); for_each_domain(cpu, sd) { - for_each_cpu(i, sched_domain_span(sd)) { + for_each_cpu_and(i, sched_domain_span(sd), + housekeeping_cpumask(HK_FLAG_TIMER)) { if (cpu == i) continue; - if (!idle_cpu(i) && housekeeping_cpu(i, HK_FLAG_TIMER)) { + if (!idle_cpu(i)) { cpu = i; goto unlock; } } } - if (!housekeeping_cpu(cpu, HK_FLAG_TIMER)) - cpu = housekeeping_any_cpu(HK_FLAG_TIMER); + if (default_cpu == -1) + default_cpu = housekeeping_any_cpu(HK_FLAG_TIMER); + cpu = default_cpu; unlock: rcu_read_unlock(); return cpu; @@ -1442,17 +1447,6 @@ void check_preempt_curr(struct rq *rq, struct task_struct *p, int flags) #ifdef CONFIG_SMP -static inline bool is_per_cpu_kthread(struct task_struct *p) -{ - if (!(p->flags & PF_KTHREAD)) - return false; - - if (p->nr_cpus_allowed != 1) - return false; - - return true; -} - /* * Per-CPU kthreads are allowed to run on !active && online CPUs, see * __set_cpus_allowed_ptr() and select_fallback_rq(). @@ -3669,28 +3663,32 @@ static void sched_tick_remote(struct work_struct *work) * statistics and checks timeslices in a time-independent way, regardless * of when exactly it is running. */ - if (idle_cpu(cpu) || !tick_nohz_tick_stopped_cpu(cpu)) + if (!tick_nohz_tick_stopped_cpu(cpu)) goto out_requeue; rq_lock_irq(rq, &rf); curr = rq->curr; - if (is_idle_task(curr) || cpu_is_offline(cpu)) + if (cpu_is_offline(cpu)) goto out_unlock; + curr = rq->curr; update_rq_clock(rq); - delta = rq_clock_task(rq) - curr->se.exec_start; - /* - * Make sure the next tick runs within a reasonable - * amount of time. - */ - WARN_ON_ONCE(delta > (u64)NSEC_PER_SEC * 3); + if (!is_idle_task(curr)) { + /* + * Make sure the next tick runs within a reasonable + * amount of time. + */ + delta = rq_clock_task(rq) - curr->se.exec_start; + WARN_ON_ONCE(delta > (u64)NSEC_PER_SEC * 3); + } curr->sched_class->task_tick(rq, curr, 0); + calc_load_nohz_remote(rq); out_unlock: rq_unlock_irq(rq, &rf); - out_requeue: + /* * Run the remote tick once per second (1Hz). This arbitrary * frequency is large enough to avoid overload but short enough @@ -7063,8 +7061,15 @@ void sched_move_task(struct task_struct *tsk) if (queued) enqueue_task(rq, tsk, queue_flags); - if (running) + if (running) { set_next_task(rq, tsk); + /* + * After changing group, the running task may have joined a + * throttled one but it's still the running task. Trigger a + * resched to make sure that task can still run. + */ + resched_curr(rq); + } task_rq_unlock(rq, tsk, &rf); } @@ -7260,7 +7265,7 @@ capacity_from_percent(char *buf) &req.percent); if (req.ret) return req; - if (req.percent > UCLAMP_PERCENT_SCALE) { + if ((u64)req.percent > UCLAMP_PERCENT_SCALE) { req.ret = -ERANGE; return req; } diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index fe4e0d775375..3c8a379c357e 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -3516,7 +3516,6 @@ update_cfs_rq_load_avg(u64 now, struct cfs_rq *cfs_rq) * attach_entity_load_avg - attach this entity to its cfs_rq load avg * @cfs_rq: cfs_rq to attach to * @se: sched_entity to attach - * @flags: migration hints * * Must call update_cfs_rq_load_avg() before this, since we rely on * cfs_rq->avg.last_update_time being current. @@ -5912,6 +5911,20 @@ static int select_idle_sibling(struct task_struct *p, int prev, int target) (available_idle_cpu(prev) || sched_idle_cpu(prev))) return prev; + /* + * Allow a per-cpu kthread to stack with the wakee if the + * kworker thread and the tasks previous CPUs are the same. + * The assumption is that the wakee queued work for the + * per-cpu kthread that is now complete and the wakeup is + * essentially a sync wakeup. An obvious example of this + * pattern is IO completions. + */ + if (is_per_cpu_kthread(current) && + prev == smp_processor_id() && + this_rq()->nr_running <= 1) { + return prev; + } + /* Check a recently used CPU as a potential idle candidate: */ recent_used_cpu = p->recent_used_cpu; if (recent_used_cpu != prev && @@ -8658,10 +8671,6 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s /* * Try to use spare capacity of local group without overloading it or * emptying busiest. - * XXX Spreading tasks across NUMA nodes is not always the best policy - * and special care should be taken for SD_NUMA domain level before - * spreading the tasks. For now, load_balance() fully relies on - * NUMA_BALANCING and fbq_classify_group/rq to override the decision. */ if (local->group_type == group_has_spare) { if (busiest->group_type > group_fully_busy) { @@ -8701,16 +8710,37 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s env->migration_type = migrate_task; lsub_positive(&nr_diff, local->sum_nr_running); env->imbalance = nr_diff >> 1; - return; - } + } else { - /* - * If there is no overload, we just want to even the number of - * idle cpus. - */ - env->migration_type = migrate_task; - env->imbalance = max_t(long, 0, (local->idle_cpus - + /* + * If there is no overload, we just want to even the number of + * idle cpus. + */ + env->migration_type = migrate_task; + env->imbalance = max_t(long, 0, (local->idle_cpus - busiest->idle_cpus) >> 1); + } + + /* Consider allowing a small imbalance between NUMA groups */ + if (env->sd->flags & SD_NUMA) { + unsigned int imbalance_min; + + /* + * Compute an allowed imbalance based on a simple + * pair of communicating tasks that should remain + * local and ignore them. + * + * NOTE: Generally this would have been based on + * the domain size and this was evaluated. However, + * the benefit is similar across a range of workloads + * and machines but scaling by the domain size adds + * the risk that lower domains have to be rebalanced. + */ + imbalance_min = 2; + if (busiest->sum_nr_running <= imbalance_min) + env->imbalance = 0; + } + return; } diff --git a/kernel/sched/loadavg.c b/kernel/sched/loadavg.c index 28a516575c18..de22da666ac7 100644 --- a/kernel/sched/loadavg.c +++ b/kernel/sched/loadavg.c @@ -231,16 +231,11 @@ static inline int calc_load_read_idx(void) return calc_load_idx & 1; } -void calc_load_nohz_start(void) +static void calc_load_nohz_fold(struct rq *rq) { - struct rq *this_rq = this_rq(); long delta; - /* - * We're going into NO_HZ mode, if there's any pending delta, fold it - * into the pending NO_HZ delta. - */ - delta = calc_load_fold_active(this_rq, 0); + delta = calc_load_fold_active(rq, 0); if (delta) { int idx = calc_load_write_idx(); @@ -248,6 +243,24 @@ void calc_load_nohz_start(void) } } +void calc_load_nohz_start(void) +{ + /* + * We're going into NO_HZ mode, if there's any pending delta, fold it + * into the pending NO_HZ delta. + */ + calc_load_nohz_fold(this_rq()); +} + +/* + * Keep track of the load for NOHZ_FULL, must be called between + * calc_load_nohz_{start,stop}(). + */ +void calc_load_nohz_remote(struct rq *rq) +{ + calc_load_nohz_fold(rq); +} + void calc_load_nohz_stop(void) { struct rq *this_rq = this_rq(); @@ -268,7 +281,7 @@ void calc_load_nohz_stop(void) this_rq->calc_load_update += LOAD_FREQ; } -static long calc_load_nohz_fold(void) +static long calc_load_nohz_read(void) { int idx = calc_load_read_idx(); long delta = 0; @@ -323,7 +336,7 @@ static void calc_global_nohz(void) } #else /* !CONFIG_NO_HZ_COMMON */ -static inline long calc_load_nohz_fold(void) { return 0; } +static inline long calc_load_nohz_read(void) { return 0; } static inline void calc_global_nohz(void) { } #endif /* CONFIG_NO_HZ_COMMON */ @@ -346,7 +359,7 @@ void calc_global_load(unsigned long ticks) /* * Fold the 'old' NO_HZ-delta to include all NO_HZ CPUs. */ - delta = calc_load_nohz_fold(); + delta = calc_load_nohz_read(); if (delta) atomic_long_add(delta, &calc_load_tasks); diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c index ac4bd0ca11cc..028520702717 100644 --- a/kernel/sched/psi.c +++ b/kernel/sched/psi.c @@ -1199,6 +1199,9 @@ static ssize_t psi_write(struct file *file, const char __user *user_buf, if (static_branch_likely(&psi_disabled)) return -EOPNOTSUPP; + if (!nbytes) + return -EINVAL; + buf_size = min(nbytes, sizeof(buf)); if (copy_from_user(buf, user_buf, buf_size)) return -EFAULT; diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 1a88dc8ad11b..9ea647835fd6 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -896,7 +896,7 @@ struct rq { */ unsigned long nr_uninterruptible; - struct task_struct *curr; + struct task_struct __rcu *curr; struct task_struct *idle; struct task_struct *stop; unsigned long next_balance; @@ -2479,3 +2479,16 @@ static inline void membarrier_switch_mm(struct rq *rq, { } #endif + +#ifdef CONFIG_SMP +static inline bool is_per_cpu_kthread(struct task_struct *p) +{ + if (!(p->flags & PF_KTHREAD)) + return false; + + if (p->nr_cpus_allowed != 1) + return false; + + return true; +} +#endif diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index e7ce7cdac62f..483b3fd1094f 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -1798,6 +1798,60 @@ void synth_event_cmd_init(struct dynevent_cmd *cmd, char *buf, int maxlen) } EXPORT_SYMBOL_GPL(synth_event_cmd_init); +static inline int +__synth_event_trace_start(struct trace_event_file *file, + struct synth_event_trace_state *trace_state) +{ + int entry_size, fields_size = 0; + int ret = 0; + + /* + * Normal event tracing doesn't get called at all unless the + * ENABLED bit is set (which attaches the probe thus allowing + * this code to be called, etc). Because this is called + * directly by the user, we don't have that but we still need + * to honor not logging when disabled. For the the iterated + * trace case, we save the enabed state upon start and just + * ignore the following data calls. + */ + if (!(file->flags & EVENT_FILE_FL_ENABLED) || + trace_trigger_soft_disabled(file)) { + trace_state->disabled = true; + ret = -ENOENT; + goto out; + } + + trace_state->event = file->event_call->data; + + fields_size = trace_state->event->n_u64 * sizeof(u64); + + /* + * Avoid ring buffer recursion detection, as this event + * is being performed within another event. + */ + trace_state->buffer = file->tr->array_buffer.buffer; + ring_buffer_nest_start(trace_state->buffer); + + entry_size = sizeof(*trace_state->entry) + fields_size; + trace_state->entry = trace_event_buffer_reserve(&trace_state->fbuffer, + file, + entry_size); + if (!trace_state->entry) { + ring_buffer_nest_end(trace_state->buffer); + ret = -EINVAL; + } +out: + return ret; +} + +static inline void +__synth_event_trace_end(struct synth_event_trace_state *trace_state) +{ + trace_event_buffer_commit(&trace_state->fbuffer); + + ring_buffer_nest_end(trace_state->buffer); +} + /** * synth_event_trace - Trace a synthetic event * @file: The trace_event_file representing the synthetic event @@ -1819,71 +1873,38 @@ EXPORT_SYMBOL_GPL(synth_event_cmd_init); */ int synth_event_trace(struct trace_event_file *file, unsigned int n_vals, ...) { - struct trace_event_buffer fbuffer; - struct synth_trace_event *entry; - struct trace_buffer *buffer; - struct synth_event *event; + struct synth_event_trace_state state; unsigned int i, n_u64; - int fields_size = 0; va_list args; - int ret = 0; - - /* - * Normal event generation doesn't get called at all unless - * the ENABLED bit is set (which attaches the probe thus - * allowing this code to be called, etc). Because this is - * called directly by the user, we don't have that but we - * still need to honor not logging when disabled. - */ - if (!(file->flags & EVENT_FILE_FL_ENABLED)) - return 0; - - event = file->event_call->data; - - if (n_vals != event->n_fields) - return -EINVAL; - - if (trace_trigger_soft_disabled(file)) - return -EINVAL; - - fields_size = event->n_u64 * sizeof(u64); - - /* - * Avoid ring buffer recursion detection, as this event - * is being performed within another event. - */ - buffer = file->tr->array_buffer.buffer; - ring_buffer_nest_start(buffer); + int ret; - entry = trace_event_buffer_reserve(&fbuffer, file, - sizeof(*entry) + fields_size); - if (!entry) { - ret = -EINVAL; - goto out; + ret = __synth_event_trace_start(file, &state); + if (ret) { + if (ret == -ENOENT) + ret = 0; /* just disabled, not really an error */ + return ret; } va_start(args, n_vals); - for (i = 0, n_u64 = 0; i < event->n_fields; i++) { + for (i = 0, n_u64 = 0; i < state.event->n_fields; i++) { u64 val; val = va_arg(args, u64); - if (event->fields[i]->is_string) { + if (state.event->fields[i]->is_string) { char *str_val = (char *)(long)val; - char *str_field = (char *)&entry->fields[n_u64]; + char *str_field = (char *)&state.entry->fields[n_u64]; strscpy(str_field, str_val, STR_VAR_LEN_MAX); n_u64 += STR_VAR_LEN_MAX / sizeof(u64); } else { - entry->fields[n_u64] = val; + state.entry->fields[n_u64] = val; n_u64++; } } va_end(args); - trace_event_buffer_commit(&fbuffer); -out: - ring_buffer_nest_end(buffer); + __synth_event_trace_end(&state); return ret; } @@ -1910,64 +1931,31 @@ EXPORT_SYMBOL_GPL(synth_event_trace); int synth_event_trace_array(struct trace_event_file *file, u64 *vals, unsigned int n_vals) { - struct trace_event_buffer fbuffer; - struct synth_trace_event *entry; - struct trace_buffer *buffer; - struct synth_event *event; + struct synth_event_trace_state state; unsigned int i, n_u64; - int fields_size = 0; - int ret = 0; - - /* - * Normal event generation doesn't get called at all unless - * the ENABLED bit is set (which attaches the probe thus - * allowing this code to be called, etc). Because this is - * called directly by the user, we don't have that but we - * still need to honor not logging when disabled. - */ - if (!(file->flags & EVENT_FILE_FL_ENABLED)) - return 0; - - event = file->event_call->data; - - if (n_vals != event->n_fields) - return -EINVAL; - - if (trace_trigger_soft_disabled(file)) - return -EINVAL; - - fields_size = event->n_u64 * sizeof(u64); - - /* - * Avoid ring buffer recursion detection, as this event - * is being performed within another event. - */ - buffer = file->tr->array_buffer.buffer; - ring_buffer_nest_start(buffer); + int ret; - entry = trace_event_buffer_reserve(&fbuffer, file, - sizeof(*entry) + fields_size); - if (!entry) { - ret = -EINVAL; - goto out; + ret = __synth_event_trace_start(file, &state); + if (ret) { + if (ret == -ENOENT) + ret = 0; /* just disabled, not really an error */ + return ret; } - for (i = 0, n_u64 = 0; i < event->n_fields; i++) { - if (event->fields[i]->is_string) { + for (i = 0, n_u64 = 0; i < state.event->n_fields; i++) { + if (state.event->fields[i]->is_string) { char *str_val = (char *)(long)vals[i]; - char *str_field = (char *)&entry->fields[n_u64]; + char *str_field = (char *)&state.entry->fields[n_u64]; strscpy(str_field, str_val, STR_VAR_LEN_MAX); n_u64 += STR_VAR_LEN_MAX / sizeof(u64); } else { - entry->fields[n_u64] = vals[i]; + state.entry->fields[n_u64] = vals[i]; n_u64++; } } - trace_event_buffer_commit(&fbuffer); -out: - ring_buffer_nest_end(buffer); + __synth_event_trace_end(&state); return ret; } @@ -2004,58 +1992,17 @@ EXPORT_SYMBOL_GPL(synth_event_trace_array); int synth_event_trace_start(struct trace_event_file *file, struct synth_event_trace_state *trace_state) { - struct synth_trace_event *entry; - int fields_size = 0; - int ret = 0; + int ret; - if (!trace_state) { - ret = -EINVAL; - goto out; - } + if (!trace_state) + return -EINVAL; memset(trace_state, '\0', sizeof(*trace_state)); - /* - * Normal event tracing doesn't get called at all unless the - * ENABLED bit is set (which attaches the probe thus allowing - * this code to be called, etc). Because this is called - * directly by the user, we don't have that but we still need - * to honor not logging when disabled. For the the iterated - * trace case, we save the enabed state upon start and just - * ignore the following data calls. - */ - if (!(file->flags & EVENT_FILE_FL_ENABLED)) { - trace_state->enabled = false; - goto out; - } - - trace_state->enabled = true; - - trace_state->event = file->event_call->data; - - if (trace_trigger_soft_disabled(file)) { - ret = -EINVAL; - goto out; - } + ret = __synth_event_trace_start(file, trace_state); + if (ret == -ENOENT) + ret = 0; /* just disabled, not really an error */ - fields_size = trace_state->event->n_u64 * sizeof(u64); - - /* - * Avoid ring buffer recursion detection, as this event - * is being performed within another event. - */ - trace_state->buffer = file->tr->array_buffer.buffer; - ring_buffer_nest_start(trace_state->buffer); - - entry = trace_event_buffer_reserve(&trace_state->fbuffer, file, - sizeof(*entry) + fields_size); - if (!entry) { - ret = -EINVAL; - goto out; - } - - trace_state->entry = entry; -out: return ret; } EXPORT_SYMBOL_GPL(synth_event_trace_start); @@ -2088,7 +2035,7 @@ static int __synth_event_add_val(const char *field_name, u64 val, trace_state->add_next = true; } - if (!trace_state->enabled) + if (trace_state->disabled) goto out; event = trace_state->event; @@ -2223,9 +2170,7 @@ int synth_event_trace_end(struct synth_event_trace_state *trace_state) if (!trace_state) return -EINVAL; - trace_event_buffer_commit(&trace_state->fbuffer); - - ring_buffer_nest_end(trace_state->buffer); + __synth_event_trace_end(trace_state); return 0; } diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index d8264ebb9581..362cca52f5de 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -1012,7 +1012,7 @@ int __kprobe_event_add_fields(struct dynevent_cmd *cmd, ...) { struct dynevent_arg arg; va_list args; - int ret; + int ret = 0; if (cmd->type != DYNEVENT_TYPE_KPROBE) return -EINVAL; diff --git a/lib/Kconfig b/lib/Kconfig index 0cf875fd627c..bc7e56370129 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -573,9 +573,6 @@ config DIMLIB config LIBFDT bool -config LIBXBC - bool - config OID_REGISTRY tristate help diff --git a/lib/Makefile b/lib/Makefile index 5d64890d6b6a..611872c06926 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -230,7 +230,7 @@ $(foreach file, $(libfdt_files), \ $(eval CFLAGS_$(file) = -I $(srctree)/scripts/dtc/libfdt)) lib-$(CONFIG_LIBFDT) += $(libfdt_files) -lib-$(CONFIG_LIBXBC) += bootconfig.o +lib-$(CONFIG_BOOT_CONFIG) += bootconfig.o obj-$(CONFIG_RBTREE_TEST) += rbtree_test.o obj-$(CONFIG_INTERVAL_TREE_TEST) += interval_tree_test.o diff --git a/lib/bootconfig.c b/lib/bootconfig.c index afb2e767e6fe..3ea601a2eba5 100644 --- a/lib/bootconfig.c +++ b/lib/bootconfig.c @@ -6,12 +6,13 @@ #define pr_fmt(fmt) "bootconfig: " fmt +#include <linux/bootconfig.h> #include <linux/bug.h> #include <linux/ctype.h> #include <linux/errno.h> #include <linux/kernel.h> +#include <linux/memblock.h> #include <linux/printk.h> -#include <linux/bootconfig.h> #include <linux/string.h> /* @@ -23,7 +24,7 @@ * node (for array). */ -static struct xbc_node xbc_nodes[XBC_NODE_MAX] __initdata; +static struct xbc_node *xbc_nodes __initdata; static int xbc_node_num __initdata; static char *xbc_data __initdata; static size_t xbc_data_size __initdata; @@ -719,7 +720,8 @@ void __init xbc_destroy_all(void) xbc_data = NULL; xbc_data_size = 0; xbc_node_num = 0; - memset(xbc_nodes, 0, sizeof(xbc_nodes)); + memblock_free(__pa(xbc_nodes), sizeof(struct xbc_node) * XBC_NODE_MAX); + xbc_nodes = NULL; } /** @@ -748,6 +750,13 @@ int __init xbc_init(char *buf) return -ERANGE; } + xbc_nodes = memblock_alloc(sizeof(struct xbc_node) * XBC_NODE_MAX, + SMP_CACHE_BYTES); + if (!xbc_nodes) { + pr_err("Failed to allocate memory for bootconfig nodes.\n"); + return -ENOMEM; + } + memset(xbc_nodes, 0, sizeof(struct xbc_node) * XBC_NODE_MAX); xbc_data = buf; xbc_data_size = ret + 1; last_parent = NULL; diff --git a/net/core/dev.c b/net/core/dev.c index a69e8bd7ed74..a6316b336128 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -4527,14 +4527,14 @@ static u32 netif_receive_generic_xdp(struct sk_buff *skb, /* Reinjected packets coming from act_mirred or similar should * not get XDP generic processing. */ - if (skb_cloned(skb) || skb_is_tc_redirected(skb)) + if (skb_is_tc_redirected(skb)) return XDP_PASS; /* XDP packets must be linear and must have sufficient headroom * of XDP_PACKET_HEADROOM bytes. This is the guarantee that also * native XDP provides, thus we need to do it here as well. */ - if (skb_is_nonlinear(skb) || + if (skb_cloned(skb) || skb_is_nonlinear(skb) || skb_headroom(skb) < XDP_PACKET_HEADROOM) { int hroom = XDP_PACKET_HEADROOM - skb_headroom(skb); int troom = skb->tail + skb->data_len - skb->end; diff --git a/net/core/page_pool.c b/net/core/page_pool.c index 9b7cbe35df37..10d2b255df5e 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -99,8 +99,7 @@ EXPORT_SYMBOL(page_pool_create); static void __page_pool_return_page(struct page_pool *pool, struct page *page); noinline -static struct page *page_pool_refill_alloc_cache(struct page_pool *pool, - bool refill) +static struct page *page_pool_refill_alloc_cache(struct page_pool *pool) { struct ptr_ring *r = &pool->ring; struct page *page; @@ -141,8 +140,7 @@ static struct page *page_pool_refill_alloc_cache(struct page_pool *pool, page = NULL; break; } - } while (pool->alloc.count < PP_ALLOC_CACHE_REFILL && - refill); + } while (pool->alloc.count < PP_ALLOC_CACHE_REFILL); /* Return last page */ if (likely(pool->alloc.count > 0)) @@ -155,20 +153,16 @@ static struct page *page_pool_refill_alloc_cache(struct page_pool *pool, /* fast path */ static struct page *__page_pool_get_cached(struct page_pool *pool) { - bool refill = false; struct page *page; - /* Test for safe-context, caller should provide this guarantee */ - if (likely(in_serving_softirq())) { - if (likely(pool->alloc.count)) { - /* Fast-path */ - page = pool->alloc.cache[--pool->alloc.count]; - return page; - } - refill = true; + /* Caller MUST guarantee safe non-concurrent access, e.g. softirq */ + if (likely(pool->alloc.count)) { + /* Fast-path */ + page = pool->alloc.cache[--pool->alloc.count]; + } else { + page = page_pool_refill_alloc_cache(pool); } - page = page_pool_refill_alloc_cache(pool, refill); return page; } diff --git a/net/dsa/tag_ar9331.c b/net/dsa/tag_ar9331.c index 466ffa92a474..55b00694cdba 100644 --- a/net/dsa/tag_ar9331.c +++ b/net/dsa/tag_ar9331.c @@ -31,7 +31,7 @@ static struct sk_buff *ar9331_tag_xmit(struct sk_buff *skb, __le16 *phdr; u16 hdr; - if (skb_cow_head(skb, 0) < 0) + if (skb_cow_head(skb, AR9331_HDR_LEN) < 0) return NULL; phdr = skb_push(skb, AR9331_HDR_LEN); diff --git a/net/dsa/tag_qca.c b/net/dsa/tag_qca.c index c8a128c9e5e0..70db7c909f74 100644 --- a/net/dsa/tag_qca.c +++ b/net/dsa/tag_qca.c @@ -33,7 +33,7 @@ static struct sk_buff *qca_tag_xmit(struct sk_buff *skb, struct net_device *dev) struct dsa_port *dp = dsa_slave_to_port(dev); u16 *phdr, hdr; - if (skb_cow_head(skb, 0) < 0) + if (skb_cow_head(skb, QCA_HDR_LEN) < 0) return NULL; skb_push(skb, QCA_HDR_LEN); diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index 18068ed42f25..f369e7ce685b 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -748,6 +748,39 @@ out:; } EXPORT_SYMBOL(__icmp_send); +#if IS_ENABLED(CONFIG_NF_NAT) +#include <net/netfilter/nf_conntrack.h> +void icmp_ndo_send(struct sk_buff *skb_in, int type, int code, __be32 info) +{ + struct sk_buff *cloned_skb = NULL; + enum ip_conntrack_info ctinfo; + struct nf_conn *ct; + __be32 orig_ip; + + ct = nf_ct_get(skb_in, &ctinfo); + if (!ct || !(ct->status & IPS_SRC_NAT)) { + icmp_send(skb_in, type, code, info); + return; + } + + if (skb_shared(skb_in)) + skb_in = cloned_skb = skb_clone(skb_in, GFP_ATOMIC); + + if (unlikely(!skb_in || skb_network_header(skb_in) < skb_in->head || + (skb_network_header(skb_in) + sizeof(struct iphdr)) > + skb_tail_pointer(skb_in) || skb_ensure_writable(skb_in, + skb_network_offset(skb_in) + sizeof(struct iphdr)))) + goto out; + + orig_ip = ip_hdr(skb_in)->saddr; + ip_hdr(skb_in)->saddr = ct->tuplehash[0].tuple.src.u3.ip; + icmp_send(skb_in, type, code, info); + ip_hdr(skb_in)->saddr = orig_ip; +out: + consume_skb(cloned_skb); +} +EXPORT_SYMBOL(icmp_ndo_send); +#endif static void icmp_socket_deliver(struct sk_buff *skb, u32 info) { diff --git a/net/ipv6/ip6_icmp.c b/net/ipv6/ip6_icmp.c index 02045494c24c..e0086758b6ee 100644 --- a/net/ipv6/ip6_icmp.c +++ b/net/ipv6/ip6_icmp.c @@ -45,4 +45,38 @@ out: rcu_read_unlock(); } EXPORT_SYMBOL(icmpv6_send); + +#if IS_ENABLED(CONFIG_NF_NAT) +#include <net/netfilter/nf_conntrack.h> +void icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info) +{ + struct sk_buff *cloned_skb = NULL; + enum ip_conntrack_info ctinfo; + struct in6_addr orig_ip; + struct nf_conn *ct; + + ct = nf_ct_get(skb_in, &ctinfo); + if (!ct || !(ct->status & IPS_SRC_NAT)) { + icmpv6_send(skb_in, type, code, info); + return; + } + + if (skb_shared(skb_in)) + skb_in = cloned_skb = skb_clone(skb_in, GFP_ATOMIC); + + if (unlikely(!skb_in || skb_network_header(skb_in) < skb_in->head || + (skb_network_header(skb_in) + sizeof(struct ipv6hdr)) > + skb_tail_pointer(skb_in) || skb_ensure_writable(skb_in, + skb_network_offset(skb_in) + sizeof(struct ipv6hdr)))) + goto out; + + orig_ip = ipv6_hdr(skb_in)->saddr; + ipv6_hdr(skb_in)->saddr = ct->tuplehash[0].tuple.src.u3.in6; + icmpv6_send(skb_in, type, code, info); + ipv6_hdr(skb_in)->saddr = orig_ip; +out: + consume_skb(cloned_skb); +} +EXPORT_SYMBOL(icmpv6_ndo_send); +#endif #endif diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index b5dd20c4599b..5d65436ad5ad 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -121,6 +121,7 @@ static struct net_device_stats *ip6_get_stats(struct net_device *dev) /** * ip6_tnl_lookup - fetch tunnel matching the end-point addresses + * @link: ifindex of underlying interface * @remote: the address of the tunnel exit-point * @local: the address of the tunnel entry-point * @@ -134,37 +135,56 @@ static struct net_device_stats *ip6_get_stats(struct net_device *dev) for (t = rcu_dereference(start); t; t = rcu_dereference(t->next)) static struct ip6_tnl * -ip6_tnl_lookup(struct net *net, const struct in6_addr *remote, const struct in6_addr *local) +ip6_tnl_lookup(struct net *net, int link, + const struct in6_addr *remote, const struct in6_addr *local) { unsigned int hash = HASH(remote, local); - struct ip6_tnl *t; + struct ip6_tnl *t, *cand = NULL; struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id); struct in6_addr any; for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) { - if (ipv6_addr_equal(local, &t->parms.laddr) && - ipv6_addr_equal(remote, &t->parms.raddr) && - (t->dev->flags & IFF_UP)) + if (!ipv6_addr_equal(local, &t->parms.laddr) || + !ipv6_addr_equal(remote, &t->parms.raddr) || + !(t->dev->flags & IFF_UP)) + continue; + + if (link == t->parms.link) return t; + else + cand = t; } memset(&any, 0, sizeof(any)); hash = HASH(&any, local); for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) { - if (ipv6_addr_equal(local, &t->parms.laddr) && - ipv6_addr_any(&t->parms.raddr) && - (t->dev->flags & IFF_UP)) + if (!ipv6_addr_equal(local, &t->parms.laddr) || + !ipv6_addr_any(&t->parms.raddr) || + !(t->dev->flags & IFF_UP)) + continue; + + if (link == t->parms.link) return t; + else if (!cand) + cand = t; } hash = HASH(remote, &any); for_each_ip6_tunnel_rcu(ip6n->tnls_r_l[hash]) { - if (ipv6_addr_equal(remote, &t->parms.raddr) && - ipv6_addr_any(&t->parms.laddr) && - (t->dev->flags & IFF_UP)) + if (!ipv6_addr_equal(remote, &t->parms.raddr) || + !ipv6_addr_any(&t->parms.laddr) || + !(t->dev->flags & IFF_UP)) + continue; + + if (link == t->parms.link) return t; + else if (!cand) + cand = t; } + if (cand) + return cand; + t = rcu_dereference(ip6n->collect_md_tun); if (t && t->dev->flags & IFF_UP) return t; @@ -351,7 +371,8 @@ static struct ip6_tnl *ip6_tnl_locate(struct net *net, (t = rtnl_dereference(*tp)) != NULL; tp = &t->next) { if (ipv6_addr_equal(local, &t->parms.laddr) && - ipv6_addr_equal(remote, &t->parms.raddr)) { + ipv6_addr_equal(remote, &t->parms.raddr) && + p->link == t->parms.link) { if (create) return ERR_PTR(-EEXIST); @@ -485,7 +506,7 @@ ip6_tnl_err(struct sk_buff *skb, __u8 ipproto, struct inet6_skb_parm *opt, processing of the error. */ rcu_read_lock(); - t = ip6_tnl_lookup(dev_net(skb->dev), &ipv6h->daddr, &ipv6h->saddr); + t = ip6_tnl_lookup(dev_net(skb->dev), skb->dev->ifindex, &ipv6h->daddr, &ipv6h->saddr); if (!t) goto out; @@ -887,7 +908,7 @@ static int ipxip6_rcv(struct sk_buff *skb, u8 ipproto, int ret = -1; rcu_read_lock(); - t = ip6_tnl_lookup(dev_net(skb->dev), &ipv6h->saddr, &ipv6h->daddr); + t = ip6_tnl_lookup(dev_net(skb->dev), skb->dev->ifindex, &ipv6h->saddr, &ipv6h->daddr); if (t) { u8 tproto = READ_ONCE(t->parms.proto); @@ -1420,8 +1441,10 @@ tx_err: static void ip6_tnl_link_config(struct ip6_tnl *t) { struct net_device *dev = t->dev; + struct net_device *tdev = NULL; struct __ip6_tnl_parm *p = &t->parms; struct flowi6 *fl6 = &t->fl.u.ip6; + unsigned int mtu; int t_hlen; memcpy(dev->dev_addr, &p->laddr, sizeof(struct in6_addr)); @@ -1457,22 +1480,25 @@ static void ip6_tnl_link_config(struct ip6_tnl *t) struct rt6_info *rt = rt6_lookup(t->net, &p->raddr, &p->laddr, p->link, NULL, strict); + if (rt) { + tdev = rt->dst.dev; + ip6_rt_put(rt); + } - if (!rt) - return; + if (!tdev && p->link) + tdev = __dev_get_by_index(t->net, p->link); - if (rt->dst.dev) { - dev->hard_header_len = rt->dst.dev->hard_header_len + - t_hlen; + if (tdev) { + dev->hard_header_len = tdev->hard_header_len + t_hlen; + mtu = min_t(unsigned int, tdev->mtu, IP6_MAX_MTU); - dev->mtu = rt->dst.dev->mtu - t_hlen; + dev->mtu = mtu - t_hlen; if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) dev->mtu -= 8; if (dev->mtu < IPV6_MIN_MTU) dev->mtu = IPV6_MIN_MTU; } - ip6_rt_put(rt); } } diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 000c742d0527..6aee699deb28 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -3450,7 +3450,7 @@ int ieee80211_attach_ack_skb(struct ieee80211_local *local, struct sk_buff *skb, spin_lock_irqsave(&local->ack_status_lock, spin_flags); id = idr_alloc(&local->ack_status_frames, ack_skb, - 1, 0x40, GFP_ATOMIC); + 1, 0x2000, GFP_ATOMIC); spin_unlock_irqrestore(&local->ack_status_lock, spin_flags); if (id < 0) { diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 5fa13176036f..e041af2f021a 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -8,7 +8,7 @@ * Copyright 2007, Michael Wu <flamingice@sourmilk.net> * Copyright 2013-2014 Intel Mobile Communications GmbH * Copyright (C) 2015 - 2017 Intel Deutschland GmbH - * Copyright (C) 2018 - 2019 Intel Corporation + * Copyright (C) 2018 - 2020 Intel Corporation */ #include <linux/delay.h> @@ -1311,7 +1311,7 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, if (!res) { ch_switch.timestamp = timestamp; ch_switch.device_timestamp = device_timestamp; - ch_switch.block_tx = beacon ? csa_ie.mode : 0; + ch_switch.block_tx = csa_ie.mode; ch_switch.chandef = csa_ie.chandef; ch_switch.count = csa_ie.count; ch_switch.delay = csa_ie.max_switch_time; @@ -1404,7 +1404,7 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, sdata->vif.csa_active = true; sdata->csa_chandef = csa_ie.chandef; - sdata->csa_block_tx = ch_switch.block_tx; + sdata->csa_block_tx = csa_ie.mode; ifmgd->csa_ignored_same_chan = false; if (sdata->csa_block_tx) @@ -1438,7 +1438,7 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, * reset when the disconnection worker runs. */ sdata->vif.csa_active = true; - sdata->csa_block_tx = ch_switch.block_tx; + sdata->csa_block_tx = csa_ie.mode; ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); mutex_unlock(&local->chanctx_mtx); diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 4bd1faf4f779..87def9cb91ff 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -2442,7 +2442,7 @@ static int ieee80211_store_ack_skb(struct ieee80211_local *local, spin_lock_irqsave(&local->ack_status_lock, flags); id = idr_alloc(&local->ack_status_frames, ack_skb, - 1, 0x40, GFP_ATOMIC); + 1, 0x2000, GFP_ATOMIC); spin_unlock_irqrestore(&local->ack_status_lock, flags); if (id >= 0) { diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 32a7a53833c0..decd46b38393 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -1063,16 +1063,22 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, elem_parse_failed = true; break; case WLAN_EID_VHT_OPERATION: - if (elen >= sizeof(struct ieee80211_vht_operation)) + if (elen >= sizeof(struct ieee80211_vht_operation)) { elems->vht_operation = (void *)pos; - else - elem_parse_failed = true; + if (calc_crc) + crc = crc32_be(crc, pos - 2, elen + 2); + break; + } + elem_parse_failed = true; break; case WLAN_EID_OPMODE_NOTIF: - if (elen > 0) + if (elen > 0) { elems->opmode_notif = pos; - else - elem_parse_failed = true; + if (calc_crc) + crc = crc32_be(crc, pos - 2, elen + 2); + break; + } + elem_parse_failed = true; break; case WLAN_EID_MESH_ID: elems->mesh_id = pos; @@ -2987,10 +2993,22 @@ bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, int cf0, cf1; int ccfs0, ccfs1, ccfs2; int ccf0, ccf1; + u32 vht_cap; + bool support_80_80 = false; + bool support_160 = false; if (!oper || !htop) return false; + vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap; + support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK | + IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)); + support_80_80 = ((vht_cap & + IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || + (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && + vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || + ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >> + IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1)); ccfs0 = oper->center_freq_seg0_idx; ccfs1 = oper->center_freq_seg1_idx; ccfs2 = (le16_to_cpu(htop->operation_mode) & @@ -3018,10 +3036,10 @@ bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, unsigned int diff; diff = abs(ccf1 - ccf0); - if (diff == 8) { + if ((diff == 8) && support_160) { new.width = NL80211_CHAN_WIDTH_160; new.center_freq1 = cf1; - } else if (diff > 8) { + } else if ((diff > 8) && support_80_80) { new.width = NL80211_CHAN_WIDTH_80P80; new.center_freq2 = cf1; } diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 73780b4cb108..030dee668e0a 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -643,7 +643,7 @@ static struct ipv6_pinfo *mptcp_inet6_sk(const struct sock *sk) } #endif -struct sock *mptcp_sk_clone_lock(const struct sock *sk) +static struct sock *mptcp_sk_clone_lock(const struct sock *sk) { struct sock *nsk = sk_clone_lock(sk, GFP_ATOMIC); diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c index f9c0d1e8d380..7e54d2ab5254 100644 --- a/net/sched/cls_flower.c +++ b/net/sched/cls_flower.c @@ -691,6 +691,7 @@ static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { .len = 128 / BITS_PER_BYTE }, [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY, .len = 128 / BITS_PER_BYTE }, + [TCA_FLOWER_FLAGS] = { .type = NLA_U32 }, }; static const struct nla_policy diff --git a/net/sched/cls_matchall.c b/net/sched/cls_matchall.c index 039cc86974f4..610a0b728161 100644 --- a/net/sched/cls_matchall.c +++ b/net/sched/cls_matchall.c @@ -157,6 +157,7 @@ static void *mall_get(struct tcf_proto *tp, u32 handle) static const struct nla_policy mall_policy[TCA_MATCHALL_MAX + 1] = { [TCA_MATCHALL_UNSPEC] = { .type = NLA_UNSPEC }, [TCA_MATCHALL_CLASSID] = { .type = NLA_U32 }, + [TCA_MATCHALL_FLAGS] = { .type = NLA_U32 }, }; static int mall_set_parms(struct net *net, struct tcf_proto *tp, diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index cee5bf4a9bb9..90988a511cd5 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -470,6 +470,8 @@ static void smc_switch_to_fallback(struct smc_sock *smc) if (smc->sk.sk_socket && smc->sk.sk_socket->file) { smc->clcsock->file = smc->sk.sk_socket->file; smc->clcsock->file->private_data = smc->clcsock; + smc->clcsock->wq.fasync_list = + smc->sk.sk_socket->wq.fasync_list; } } diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c index 0879f7bed967..86cccc24e52e 100644 --- a/net/smc/smc_clc.c +++ b/net/smc/smc_clc.c @@ -372,7 +372,9 @@ int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info) dclc.hdr.length = htons(sizeof(struct smc_clc_msg_decline)); dclc.hdr.version = SMC_CLC_V1; dclc.hdr.flag = (peer_diag_info == SMC_CLC_DECL_SYNCERR) ? 1 : 0; - memcpy(dclc.id_for_peer, local_systemid, sizeof(local_systemid)); + if (smc->conn.lgr && !smc->conn.lgr->is_smcd) + memcpy(dclc.id_for_peer, local_systemid, + sizeof(local_systemid)); dclc.peer_diagnosis = htonl(peer_diag_info); memcpy(dclc.trl.eyecatcher, SMC_EYECATCHER, sizeof(SMC_EYECATCHER)); diff --git a/net/smc/smc_diag.c b/net/smc/smc_diag.c index f38727ecf8b2..e1f64f4ba236 100644 --- a/net/smc/smc_diag.c +++ b/net/smc/smc_diag.c @@ -39,16 +39,15 @@ static void smc_diag_msg_common_fill(struct smc_diag_msg *r, struct sock *sk) { struct smc_sock *smc = smc_sk(sk); + memset(r, 0, sizeof(*r)); r->diag_family = sk->sk_family; + sock_diag_save_cookie(sk, r->id.idiag_cookie); if (!smc->clcsock) return; r->id.idiag_sport = htons(smc->clcsock->sk->sk_num); r->id.idiag_dport = smc->clcsock->sk->sk_dport; r->id.idiag_if = smc->clcsock->sk->sk_bound_dev_if; - sock_diag_save_cookie(sk, r->id.idiag_cookie); if (sk->sk_protocol == SMCPROTO_SMC) { - memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); - memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); r->id.idiag_src[0] = smc->clcsock->sk->sk_rcv_saddr; r->id.idiag_dst[0] = smc->clcsock->sk->sk_daddr; #if IS_ENABLED(CONFIG_IPV6) diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c index 095be887753e..125297c9aa3e 100644 --- a/net/sunrpc/xprtrdma/frwr_ops.c +++ b/net/sunrpc/xprtrdma/frwr_ops.c @@ -288,8 +288,8 @@ struct rpcrdma_mr_seg *frwr_map(struct rpcrdma_xprt *r_xprt, { struct rpcrdma_ia *ia = &r_xprt->rx_ia; struct ib_reg_wr *reg_wr; + int i, n, dma_nents; struct ib_mr *ibmr; - int i, n; u8 key; if (nsegs > ia->ri_max_frwr_depth) @@ -313,15 +313,16 @@ struct rpcrdma_mr_seg *frwr_map(struct rpcrdma_xprt *r_xprt, break; } mr->mr_dir = rpcrdma_data_dir(writing); + mr->mr_nents = i; - mr->mr_nents = - ib_dma_map_sg(ia->ri_id->device, mr->mr_sg, i, mr->mr_dir); - if (!mr->mr_nents) + dma_nents = ib_dma_map_sg(ia->ri_id->device, mr->mr_sg, mr->mr_nents, + mr->mr_dir); + if (!dma_nents) goto out_dmamap_err; ibmr = mr->frwr.fr_mr; - n = ib_map_mr_sg(ibmr, mr->mr_sg, mr->mr_nents, NULL, PAGE_SIZE); - if (unlikely(n != mr->mr_nents)) + n = ib_map_mr_sg(ibmr, mr->mr_sg, dma_nents, NULL, PAGE_SIZE); + if (n != dma_nents) goto out_mapmr_err; ibmr->iova &= 0x00000000ffffffff; diff --git a/net/tipc/node.c b/net/tipc/node.c index 99b28b69fc17..0c88778c88b5 100644 --- a/net/tipc/node.c +++ b/net/tipc/node.c @@ -278,7 +278,7 @@ struct tipc_crypto *tipc_node_crypto_rx_by_list(struct list_head *pos) } #endif -void tipc_node_free(struct rcu_head *rp) +static void tipc_node_free(struct rcu_head *rp) { struct tipc_node *n = container_of(rp, struct tipc_node, rcu); @@ -2798,7 +2798,7 @@ static int tipc_nl_retrieve_nodeid(struct nlattr **attrs, u8 **node_id) return 0; } -int __tipc_nl_node_set_key(struct sk_buff *skb, struct genl_info *info) +static int __tipc_nl_node_set_key(struct sk_buff *skb, struct genl_info *info) { struct nlattr *attrs[TIPC_NLA_NODE_MAX + 1]; struct net *net = sock_net(skb->sk); @@ -2875,7 +2875,8 @@ int tipc_nl_node_set_key(struct sk_buff *skb, struct genl_info *info) return err; } -int __tipc_nl_node_flush_key(struct sk_buff *skb, struct genl_info *info) +static int __tipc_nl_node_flush_key(struct sk_buff *skb, + struct genl_info *info) { struct net *net = sock_net(skb->sk); struct tipc_net *tn = tipc_net(net); diff --git a/net/tipc/socket.c b/net/tipc/socket.c index f9b4fb92c0b1..693e8902161e 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -2441,6 +2441,8 @@ static int tipc_wait_for_connect(struct socket *sock, long *timeo_p) return -ETIMEDOUT; if (signal_pending(current)) return sock_intr_errno(*timeo_p); + if (sk->sk_state == TIPC_DISCONNECTING) + break; add_wait_queue(sk_sleep(sk), &wait); done = sk_wait_event(sk, timeo_p, tipc_sk_connected(sk), diff --git a/net/wireless/ethtool.c b/net/wireless/ethtool.c index a9c0f368db5d..24e18405cdb4 100644 --- a/net/wireless/ethtool.c +++ b/net/wireless/ethtool.c @@ -7,9 +7,13 @@ void cfg80211_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) { struct wireless_dev *wdev = dev->ieee80211_ptr; + struct device *pdev = wiphy_dev(wdev->wiphy); - strlcpy(info->driver, wiphy_dev(wdev->wiphy)->driver->name, - sizeof(info->driver)); + if (pdev->driver) + strlcpy(info->driver, pdev->driver->name, + sizeof(info->driver)); + else + strlcpy(info->driver, "N/A", sizeof(info->driver)); strlcpy(info->version, init_utsname()->release, sizeof(info->version)); diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 123b8d720a59..cedf17d4933f 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -437,6 +437,7 @@ const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = { [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG }, [NL80211_ATTR_CONTROL_PORT_OVER_NL80211] = { .type = NLA_FLAG }, [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG }, + [NL80211_ATTR_STATUS_CODE] = { .type = NLA_U16 }, [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 }, [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 }, [NL80211_ATTR_PID] = { .type = NLA_U32 }, diff --git a/net/xfrm/xfrm_interface.c b/net/xfrm/xfrm_interface.c index dc651a628dcf..3361e3ac5714 100644 --- a/net/xfrm/xfrm_interface.c +++ b/net/xfrm/xfrm_interface.c @@ -300,10 +300,10 @@ xfrmi_xmit2(struct sk_buff *skb, struct net_device *dev, struct flowi *fl) if (mtu < IPV6_MIN_MTU) mtu = IPV6_MIN_MTU; - icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); + icmpv6_ndo_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); } else { - icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, - htonl(mtu)); + icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, + htonl(mtu)); } dst_release(dst); diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c index a566d8201b56..0133dfaaf352 100644 --- a/scripts/kallsyms.c +++ b/scripts/kallsyms.c @@ -210,7 +210,7 @@ static struct sym_entry *read_symbol(FILE *in) len = strlen(name) + 1; - sym = malloc(sizeof(*sym) + len); + sym = malloc(sizeof(*sym) + len + 1); if (!sym) { fprintf(stderr, "kallsyms failure: " "unable to allocate required amount of memory\n"); @@ -219,7 +219,7 @@ static struct sym_entry *read_symbol(FILE *in) sym->addr = addr; sym->len = len; sym->sym[0] = type; - memcpy(sym_name(sym), name, len); + strcpy(sym_name(sym), name); sym->percpu_absolute = 0; return sym; diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh index 1919c311c149..dd484e92752e 100755 --- a/scripts/link-vmlinux.sh +++ b/scripts/link-vmlinux.sh @@ -239,7 +239,7 @@ else fi; # final build of init/ -${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init +${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init need-builtin=1 #link vmlinux.o info LD vmlinux.o diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 4b6991e178d3..1659b59fb5d7 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -698,7 +698,7 @@ static int selinux_set_mnt_opts(struct super_block *sb, if (!strcmp(sb->s_type->name, "debugfs") || !strcmp(sb->s_type->name, "tracefs") || - !strcmp(sb->s_type->name, "binderfs") || + !strcmp(sb->s_type->name, "binder") || !strcmp(sb->s_type->name, "pstore")) sbsec->flags |= SE_SBGENFS; diff --git a/security/selinux/ss/sidtab.c b/security/selinux/ss/sidtab.c index a308ce1e6a13..f511ffccb131 100644 --- a/security/selinux/ss/sidtab.c +++ b/security/selinux/ss/sidtab.c @@ -518,19 +518,13 @@ void sidtab_sid2str_put(struct sidtab *s, struct sidtab_entry *entry, const char *str, u32 str_len) { struct sidtab_str_cache *cache, *victim = NULL; + unsigned long flags; /* do not cache invalid contexts */ if (entry->context.len) return; - /* - * Skip the put operation when in non-task context to avoid the need - * to disable interrupts while holding s->cache_lock. - */ - if (!in_task()) - return; - - spin_lock(&s->cache_lock); + spin_lock_irqsave(&s->cache_lock, flags); cache = rcu_dereference_protected(entry->cache, lockdep_is_held(&s->cache_lock)); @@ -561,7 +555,7 @@ void sidtab_sid2str_put(struct sidtab *s, struct sidtab_entry *entry, rcu_assign_pointer(entry->cache, cache); out_unlock: - spin_unlock(&s->cache_lock); + spin_unlock_irqrestore(&s->cache_lock, flags); kfree_rcu(victim, rcu_member); } diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 336406bcb59e..d5443eeb8b63 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -2594,7 +2594,8 @@ void snd_pcm_release_substream(struct snd_pcm_substream *substream) snd_pcm_drop(substream); if (substream->hw_opened) { - do_hw_free(substream); + if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) + do_hw_free(substream); substream->ops->close(substream); substream->hw_opened = 0; } diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index 4770fb3f51fb..6c8cb4ce517e 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -2447,6 +2447,7 @@ static const struct snd_pci_quirk alc882_fixup_tbl[] = { SND_PCI_QUIRK(0x1071, 0x8258, "Evesham Voyaeger", ALC882_FIXUP_EAPD), SND_PCI_QUIRK(0x1458, 0xa002, "Gigabyte EP45-DS3/Z87X-UD3H", ALC889_FIXUP_FRONT_HP_NO_PRESENCE), SND_PCI_QUIRK(0x1458, 0xa0b8, "Gigabyte AZ370-Gaming", ALC1220_FIXUP_GB_DUAL_CODECS), + SND_PCI_QUIRK(0x1462, 0x1276, "MSI-GL73", ALC1220_FIXUP_CLEVO_P950), SND_PCI_QUIRK(0x1462, 0x7350, "MSI-7350", ALC889_FIXUP_CD), SND_PCI_QUIRK(0x1462, 0xda57, "MSI Z270-Gaming", ALC1220_FIXUP_GB_DUAL_CODECS), SND_PCI_QUIRK_VENDOR(0x1462, "MSI", ALC882_FIXUP_GPIO3), @@ -5701,8 +5702,11 @@ static void alc_fixup_headset_jack(struct hda_codec *codec, break; case HDA_FIXUP_ACT_INIT: switch (codec->core.vendor_id) { + case 0x10ec0215: case 0x10ec0225: + case 0x10ec0285: case 0x10ec0295: + case 0x10ec0289: case 0x10ec0299: alc_write_coef_idx(codec, 0x48, 0xd011); alc_update_coef_idx(codec, 0x49, 0x007f, 0x0045); diff --git a/sound/usb/clock.c b/sound/usb/clock.c index 018b1ecb5404..a48313dfa967 100644 --- a/sound/usb/clock.c +++ b/sound/usb/clock.c @@ -151,8 +151,34 @@ static int uac_clock_selector_set_val(struct snd_usb_audio *chip, int selector_i return ret; } +/* + * Assume the clock is valid if clock source supports only one single sample + * rate, the terminal is connected directly to it (there is no clock selector) + * and clock type is internal. This is to deal with some Denon DJ controllers + * that always reports that clock is invalid. + */ +static bool uac_clock_source_is_valid_quirk(struct snd_usb_audio *chip, + struct audioformat *fmt, + int source_id) +{ + if (fmt->protocol == UAC_VERSION_2) { + struct uac_clock_source_descriptor *cs_desc = + snd_usb_find_clock_source(chip->ctrl_intf, source_id); + + if (!cs_desc) + return false; + + return (fmt->nr_rates == 1 && + (fmt->clock & 0xff) == cs_desc->bClockID && + (cs_desc->bmAttributes & 0x3) != + UAC_CLOCK_SOURCE_TYPE_EXT); + } + + return false; +} + static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, - int protocol, + struct audioformat *fmt, int source_id) { int err; @@ -160,7 +186,7 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, struct usb_device *dev = chip->dev; u32 bmControls; - if (protocol == UAC_VERSION_3) { + if (fmt->protocol == UAC_VERSION_3) { struct uac3_clock_source_descriptor *cs_desc = snd_usb_find_clock_source_v3(chip->ctrl_intf, source_id); @@ -194,10 +220,14 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, return false; } - return data ? true : false; + if (data) + return true; + else + return uac_clock_source_is_valid_quirk(chip, fmt, source_id); } -static int __uac_clock_find_source(struct snd_usb_audio *chip, int entity_id, +static int __uac_clock_find_source(struct snd_usb_audio *chip, + struct audioformat *fmt, int entity_id, unsigned long *visited, bool validate) { struct uac_clock_source_descriptor *source; @@ -217,7 +247,7 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip, int entity_id, source = snd_usb_find_clock_source(chip->ctrl_intf, entity_id); if (source) { entity_id = source->bClockID; - if (validate && !uac_clock_source_is_valid(chip, UAC_VERSION_2, + if (validate && !uac_clock_source_is_valid(chip, fmt, entity_id)) { usb_audio_err(chip, "clock source %d is not valid, cannot use\n", @@ -248,8 +278,9 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip, int entity_id, } cur = ret; - ret = __uac_clock_find_source(chip, selector->baCSourceID[ret - 1], - visited, validate); + ret = __uac_clock_find_source(chip, fmt, + selector->baCSourceID[ret - 1], + visited, validate); if (!validate || ret > 0 || !chip->autoclock) return ret; @@ -260,8 +291,9 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip, int entity_id, if (i == cur) continue; - ret = __uac_clock_find_source(chip, selector->baCSourceID[i - 1], - visited, true); + ret = __uac_clock_find_source(chip, fmt, + selector->baCSourceID[i - 1], + visited, true); if (ret < 0) continue; @@ -281,14 +313,16 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip, int entity_id, /* FIXME: multipliers only act as pass-thru element for now */ multiplier = snd_usb_find_clock_multiplier(chip->ctrl_intf, entity_id); if (multiplier) - return __uac_clock_find_source(chip, multiplier->bCSourceID, - visited, validate); + return __uac_clock_find_source(chip, fmt, + multiplier->bCSourceID, + visited, validate); return -EINVAL; } -static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id, - unsigned long *visited, bool validate) +static int __uac3_clock_find_source(struct snd_usb_audio *chip, + struct audioformat *fmt, int entity_id, + unsigned long *visited, bool validate) { struct uac3_clock_source_descriptor *source; struct uac3_clock_selector_descriptor *selector; @@ -307,7 +341,7 @@ static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id, source = snd_usb_find_clock_source_v3(chip->ctrl_intf, entity_id); if (source) { entity_id = source->bClockID; - if (validate && !uac_clock_source_is_valid(chip, UAC_VERSION_3, + if (validate && !uac_clock_source_is_valid(chip, fmt, entity_id)) { usb_audio_err(chip, "clock source %d is not valid, cannot use\n", @@ -338,7 +372,8 @@ static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id, } cur = ret; - ret = __uac3_clock_find_source(chip, selector->baCSourceID[ret - 1], + ret = __uac3_clock_find_source(chip, fmt, + selector->baCSourceID[ret - 1], visited, validate); if (!validate || ret > 0 || !chip->autoclock) return ret; @@ -350,8 +385,9 @@ static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id, if (i == cur) continue; - ret = __uac3_clock_find_source(chip, selector->baCSourceID[i - 1], - visited, true); + ret = __uac3_clock_find_source(chip, fmt, + selector->baCSourceID[i - 1], + visited, true); if (ret < 0) continue; @@ -372,7 +408,8 @@ static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id, multiplier = snd_usb_find_clock_multiplier_v3(chip->ctrl_intf, entity_id); if (multiplier) - return __uac3_clock_find_source(chip, multiplier->bCSourceID, + return __uac3_clock_find_source(chip, fmt, + multiplier->bCSourceID, visited, validate); return -EINVAL; @@ -389,18 +426,18 @@ static int __uac3_clock_find_source(struct snd_usb_audio *chip, int entity_id, * * Returns the clock source UnitID (>=0) on success, or an error. */ -int snd_usb_clock_find_source(struct snd_usb_audio *chip, int protocol, - int entity_id, bool validate) +int snd_usb_clock_find_source(struct snd_usb_audio *chip, + struct audioformat *fmt, bool validate) { DECLARE_BITMAP(visited, 256); memset(visited, 0, sizeof(visited)); - switch (protocol) { + switch (fmt->protocol) { case UAC_VERSION_2: - return __uac_clock_find_source(chip, entity_id, visited, + return __uac_clock_find_source(chip, fmt, fmt->clock, visited, validate); case UAC_VERSION_3: - return __uac3_clock_find_source(chip, entity_id, visited, + return __uac3_clock_find_source(chip, fmt, fmt->clock, visited, validate); default: return -EINVAL; @@ -501,8 +538,7 @@ static int set_sample_rate_v2v3(struct snd_usb_audio *chip, int iface, * automatic clock selection if the current clock is not * valid. */ - clock = snd_usb_clock_find_source(chip, fmt->protocol, - fmt->clock, true); + clock = snd_usb_clock_find_source(chip, fmt, true); if (clock < 0) { /* We did not find a valid clock, but that might be * because the current sample rate does not match an @@ -510,8 +546,7 @@ static int set_sample_rate_v2v3(struct snd_usb_audio *chip, int iface, * and we will do another validation after setting the * rate. */ - clock = snd_usb_clock_find_source(chip, fmt->protocol, - fmt->clock, false); + clock = snd_usb_clock_find_source(chip, fmt, false); if (clock < 0) return clock; } @@ -577,7 +612,7 @@ static int set_sample_rate_v2v3(struct snd_usb_audio *chip, int iface, validation: /* validate clock after rate change */ - if (!uac_clock_source_is_valid(chip, fmt->protocol, clock)) + if (!uac_clock_source_is_valid(chip, fmt, clock)) return -ENXIO; return 0; } diff --git a/sound/usb/clock.h b/sound/usb/clock.h index 076e31b79ee0..68df0fbe09d0 100644 --- a/sound/usb/clock.h +++ b/sound/usb/clock.h @@ -6,7 +6,7 @@ int snd_usb_init_sample_rate(struct snd_usb_audio *chip, int iface, struct usb_host_interface *alts, struct audioformat *fmt, int rate); -int snd_usb_clock_find_source(struct snd_usb_audio *chip, int protocol, - int entity_id, bool validate); +int snd_usb_clock_find_source(struct snd_usb_audio *chip, + struct audioformat *fmt, bool validate); #endif /* __USBAUDIO_CLOCK_H */ diff --git a/sound/usb/format.c b/sound/usb/format.c index 9260136e4c9b..9f5cb4ed3a0c 100644 --- a/sound/usb/format.c +++ b/sound/usb/format.c @@ -151,6 +151,19 @@ static u64 parse_audio_format_i_type(struct snd_usb_audio *chip, return pcm_formats; } +static int set_fixed_rate(struct audioformat *fp, int rate, int rate_bits) +{ + kfree(fp->rate_table); + fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL); + if (!fp->rate_table) + return -ENOMEM; + fp->nr_rates = 1; + fp->rate_min = rate; + fp->rate_max = rate; + fp->rates = rate_bits; + fp->rate_table[0] = rate; + return 0; +} /* * parse the format descriptor and stores the possible sample rates @@ -223,6 +236,14 @@ static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audiof fp->rate_min = combine_triple(&fmt[offset + 1]); fp->rate_max = combine_triple(&fmt[offset + 4]); } + + /* Jabra Evolve 65 headset */ + if (chip->usb_id == USB_ID(0x0b0e, 0x030b)) { + /* only 48kHz for playback while keeping 16kHz for capture */ + if (fp->nr_rates != 1) + return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000); + } + return 0; } @@ -299,17 +320,7 @@ static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip, case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */ case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */ case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */ - /* supported rates: 48Khz */ - kfree(fp->rate_table); - fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL); - if (!fp->rate_table) - return -ENOMEM; - fp->nr_rates = 1; - fp->rate_min = 48000; - fp->rate_max = 48000; - fp->rates = SNDRV_PCM_RATE_48000; - fp->rate_table[0] = 48000; - return 0; + return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000); } return -ENODEV; @@ -325,8 +336,7 @@ static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip, struct usb_device *dev = chip->dev; unsigned char tmp[2], *data; int nr_triplets, data_size, ret = 0, ret_l6; - int clock = snd_usb_clock_find_source(chip, fp->protocol, - fp->clock, false); + int clock = snd_usb_clock_find_source(chip, fp, false); if (clock < 0) { dev_err(&dev->dev, diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index d659fdb475e2..81b2db0edd5f 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -897,6 +897,15 @@ static int parse_term_proc_unit(struct mixer_build *state, return 0; } +static int parse_term_effect_unit(struct mixer_build *state, + struct usb_audio_term *term, + void *p1, int id) +{ + term->type = UAC3_EFFECT_UNIT << 16; /* virtual type */ + term->id = id; + return 0; +} + static int parse_term_uac2_clock_source(struct mixer_build *state, struct usb_audio_term *term, void *p1, int id) @@ -981,8 +990,7 @@ static int __check_input_term(struct mixer_build *state, int id, UAC3_PROCESSING_UNIT); case PTYPE(UAC_VERSION_2, UAC2_EFFECT_UNIT): case PTYPE(UAC_VERSION_3, UAC3_EFFECT_UNIT): - return parse_term_proc_unit(state, term, p1, id, - UAC3_EFFECT_UNIT); + return parse_term_effect_unit(state, term, p1, id); case PTYPE(UAC_VERSION_1, UAC1_EXTENSION_UNIT): case PTYPE(UAC_VERSION_2, UAC2_EXTENSION_UNIT_V2): case PTYPE(UAC_VERSION_3, UAC3_EXTENSION_UNIT): diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c index 3a5242e383b2..7f558f4b4520 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -1440,6 +1440,7 @@ bool snd_usb_get_sample_rate_quirk(struct snd_usb_audio *chip) case USB_ID(0x1395, 0x740a): /* Sennheiser DECT */ case USB_ID(0x1901, 0x0191): /* GE B850V3 CP2114 audio interface */ case USB_ID(0x21b4, 0x0081): /* AudioQuest DragonFly */ + case USB_ID(0x2912, 0x30c8): /* Audioengine D1 */ return true; } diff --git a/tools/arch/arm64/include/uapi/asm/kvm.h b/tools/arch/arm64/include/uapi/asm/kvm.h index 820e5751ada7..ba85bb23f060 100644 --- a/tools/arch/arm64/include/uapi/asm/kvm.h +++ b/tools/arch/arm64/include/uapi/asm/kvm.h @@ -220,10 +220,18 @@ struct kvm_vcpu_events { #define KVM_REG_ARM_PTIMER_CVAL ARM64_SYS_REG(3, 3, 14, 2, 2) #define KVM_REG_ARM_PTIMER_CNT ARM64_SYS_REG(3, 3, 14, 0, 1) -/* EL0 Virtual Timer Registers */ +/* + * EL0 Virtual Timer Registers + * + * WARNING: + * KVM_REG_ARM_TIMER_CVAL and KVM_REG_ARM_TIMER_CNT are not defined + * with the appropriate register encodings. Their values have been + * accidentally swapped. As this is set API, the definitions here + * must be used, rather than ones derived from the encodings. + */ #define KVM_REG_ARM_TIMER_CTL ARM64_SYS_REG(3, 3, 14, 3, 1) -#define KVM_REG_ARM_TIMER_CNT ARM64_SYS_REG(3, 3, 14, 3, 2) #define KVM_REG_ARM_TIMER_CVAL ARM64_SYS_REG(3, 3, 14, 0, 2) +#define KVM_REG_ARM_TIMER_CNT ARM64_SYS_REG(3, 3, 14, 3, 2) /* KVM-as-firmware specific pseudo-registers */ #define KVM_REG_ARM_FW (0x0014 << KVM_REG_ARM_COPROC_SHIFT) diff --git a/tools/arch/arm64/include/uapi/asm/unistd.h b/tools/arch/arm64/include/uapi/asm/unistd.h index 4703d218663a..f83a70e07df8 100644 --- a/tools/arch/arm64/include/uapi/asm/unistd.h +++ b/tools/arch/arm64/include/uapi/asm/unistd.h @@ -19,5 +19,6 @@ #define __ARCH_WANT_NEW_STAT #define __ARCH_WANT_SET_GET_RLIMIT #define __ARCH_WANT_TIME32_SYSCALLS +#define __ARCH_WANT_SYS_CLONE3 #include <asm-generic/unistd.h> diff --git a/tools/arch/x86/include/asm/cpufeatures.h b/tools/arch/x86/include/asm/cpufeatures.h index e9b62498fe75..f3327cb56edf 100644 --- a/tools/arch/x86/include/asm/cpufeatures.h +++ b/tools/arch/x86/include/asm/cpufeatures.h @@ -220,6 +220,7 @@ #define X86_FEATURE_ZEN ( 7*32+28) /* "" CPU is AMD family 0x17 (Zen) */ #define X86_FEATURE_L1TF_PTEINV ( 7*32+29) /* "" L1TF workaround PTE inversion */ #define X86_FEATURE_IBRS_ENHANCED ( 7*32+30) /* Enhanced IBRS */ +#define X86_FEATURE_MSR_IA32_FEAT_CTL ( 7*32+31) /* "" MSR IA32_FEAT_CTL configured */ /* Virtualization flags: Linux defined, word 8 */ #define X86_FEATURE_TPR_SHADOW ( 8*32+ 0) /* Intel TPR Shadow */ @@ -357,6 +358,7 @@ /* Intel-defined CPU features, CPUID level 0x00000007:0 (EDX), word 18 */ #define X86_FEATURE_AVX512_4VNNIW (18*32+ 2) /* AVX-512 Neural Network Instructions */ #define X86_FEATURE_AVX512_4FMAPS (18*32+ 3) /* AVX-512 Multiply Accumulation Single precision */ +#define X86_FEATURE_FSRM (18*32+ 4) /* Fast Short Rep Mov */ #define X86_FEATURE_AVX512_VP2INTERSECT (18*32+ 8) /* AVX-512 Intersect for D/Q */ #define X86_FEATURE_MD_CLEAR (18*32+10) /* VERW clears CPU buffers */ #define X86_FEATURE_TSX_FORCE_ABORT (18*32+13) /* "" TSX_FORCE_ABORT */ diff --git a/tools/arch/x86/include/asm/disabled-features.h b/tools/arch/x86/include/asm/disabled-features.h index 8e1d0bb46361..4ea8584682f9 100644 --- a/tools/arch/x86/include/asm/disabled-features.h +++ b/tools/arch/x86/include/asm/disabled-features.h @@ -10,12 +10,6 @@ * cpu_feature_enabled(). */ -#ifdef CONFIG_X86_INTEL_MPX -# define DISABLE_MPX 0 -#else -# define DISABLE_MPX (1<<(X86_FEATURE_MPX & 31)) -#endif - #ifdef CONFIG_X86_SMAP # define DISABLE_SMAP 0 #else @@ -74,7 +68,7 @@ #define DISABLED_MASK6 0 #define DISABLED_MASK7 (DISABLE_PTI) #define DISABLED_MASK8 0 -#define DISABLED_MASK9 (DISABLE_MPX|DISABLE_SMAP) +#define DISABLED_MASK9 (DISABLE_SMAP) #define DISABLED_MASK10 0 #define DISABLED_MASK11 0 #define DISABLED_MASK12 0 diff --git a/tools/bootconfig/include/linux/memblock.h b/tools/bootconfig/include/linux/memblock.h new file mode 100644 index 000000000000..7862f217d85d --- /dev/null +++ b/tools/bootconfig/include/linux/memblock.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _XBC_LINUX_MEMBLOCK_H +#define _XBC_LINUX_MEMBLOCK_H + +#include <stdlib.h> + +#define __pa(addr) (addr) +#define SMP_CACHE_BYTES 0 +#define memblock_alloc(size, align) malloc(size) +#define memblock_free(paddr, size) free(paddr) + +#endif diff --git a/tools/bootconfig/include/linux/printk.h b/tools/bootconfig/include/linux/printk.h index 017bcd6912a5..e978a63d3222 100644 --- a/tools/bootconfig/include/linux/printk.h +++ b/tools/bootconfig/include/linux/printk.h @@ -7,7 +7,7 @@ /* controllable printf */ extern int pr_output; #define printk(fmt, ...) \ - (pr_output ? printf(fmt, __VA_ARGS__) : 0) + (pr_output ? printf(fmt, ##__VA_ARGS__) : 0) #define pr_err printk #define pr_warn printk diff --git a/tools/bootconfig/main.c b/tools/bootconfig/main.c index 47f488458328..e18eeb070562 100644 --- a/tools/bootconfig/main.c +++ b/tools/bootconfig/main.c @@ -140,7 +140,7 @@ int load_xbc_from_initrd(int fd, char **buf) return 0; if (lseek(fd, -8, SEEK_END) < 0) { - printf("Failed to lseek: %d\n", -errno); + pr_err("Failed to lseek: %d\n", -errno); return -errno; } @@ -155,7 +155,7 @@ int load_xbc_from_initrd(int fd, char **buf) return 0; if (lseek(fd, stat.st_size - 8 - size, SEEK_SET) < 0) { - printf("Failed to lseek: %d\n", -errno); + pr_err("Failed to lseek: %d\n", -errno); return -errno; } @@ -166,7 +166,7 @@ int load_xbc_from_initrd(int fd, char **buf) /* Wrong Checksum, maybe no boot config here */ rcsum = checksum((unsigned char *)*buf, size); if (csum != rcsum) { - printf("checksum error: %d != %d\n", csum, rcsum); + pr_err("checksum error: %d != %d\n", csum, rcsum); return 0; } @@ -185,13 +185,13 @@ int show_xbc(const char *path) fd = open(path, O_RDONLY); if (fd < 0) { - printf("Failed to open initrd %s: %d\n", path, fd); + pr_err("Failed to open initrd %s: %d\n", path, fd); return -errno; } ret = load_xbc_from_initrd(fd, &buf); if (ret < 0) - printf("Failed to load a boot config from initrd: %d\n", ret); + pr_err("Failed to load a boot config from initrd: %d\n", ret); else xbc_show_compact_tree(); @@ -209,7 +209,7 @@ int delete_xbc(const char *path) fd = open(path, O_RDWR); if (fd < 0) { - printf("Failed to open initrd %s: %d\n", path, fd); + pr_err("Failed to open initrd %s: %d\n", path, fd); return -errno; } @@ -222,7 +222,7 @@ int delete_xbc(const char *path) pr_output = 1; if (size < 0) { ret = size; - printf("Failed to load a boot config from initrd: %d\n", ret); + pr_err("Failed to load a boot config from initrd: %d\n", ret); } else if (size > 0) { ret = fstat(fd, &stat); if (!ret) @@ -245,7 +245,7 @@ int apply_xbc(const char *path, const char *xbc_path) ret = load_xbc_file(xbc_path, &buf); if (ret < 0) { - printf("Failed to load %s : %d\n", xbc_path, ret); + pr_err("Failed to load %s : %d\n", xbc_path, ret); return ret; } size = strlen(buf) + 1; @@ -262,7 +262,7 @@ int apply_xbc(const char *path, const char *xbc_path) /* Check the data format */ ret = xbc_init(buf); if (ret < 0) { - printf("Failed to parse %s: %d\n", xbc_path, ret); + pr_err("Failed to parse %s: %d\n", xbc_path, ret); free(data); free(buf); return ret; @@ -279,20 +279,20 @@ int apply_xbc(const char *path, const char *xbc_path) /* Remove old boot config if exists */ ret = delete_xbc(path); if (ret < 0) { - printf("Failed to delete previous boot config: %d\n", ret); + pr_err("Failed to delete previous boot config: %d\n", ret); return ret; } /* Apply new one */ fd = open(path, O_RDWR | O_APPEND); if (fd < 0) { - printf("Failed to open %s: %d\n", path, fd); + pr_err("Failed to open %s: %d\n", path, fd); return fd; } /* TODO: Ensure the @path is initramfs/initrd image */ ret = write(fd, data, size + 8); if (ret < 0) { - printf("Failed to apply a boot config: %d\n", ret); + pr_err("Failed to apply a boot config: %d\n", ret); return ret; } close(fd); @@ -334,12 +334,12 @@ int main(int argc, char **argv) } if (apply && delete) { - printf("Error: You can not specify both -a and -d at once.\n"); + pr_err("Error: You can not specify both -a and -d at once.\n"); return usage(); } if (optind >= argc) { - printf("Error: No initrd is specified.\n"); + pr_err("Error: No initrd is specified.\n"); return usage(); } diff --git a/tools/bootconfig/test-bootconfig.sh b/tools/bootconfig/test-bootconfig.sh index 87725e8723f8..1de06de328e2 100755 --- a/tools/bootconfig/test-bootconfig.sh +++ b/tools/bootconfig/test-bootconfig.sh @@ -64,6 +64,15 @@ echo "File size check" new_size=$(stat -c %s $INITRD) xpass test $new_size -eq $initrd_size +echo "No error messge while applying" +OUTFILE=`mktemp tempout-XXXX` +dd if=/dev/zero of=$INITRD bs=4096 count=1 +printf " \0\0\0 \0\0\0" >> $INITRD +$BOOTCONF -a $TEMPCONF $INITRD > $OUTFILE 2>&1 +xfail grep -i "failed" $OUTFILE +xfail grep -i "error" $OUTFILE +rm $OUTFILE + echo "Max node number check" echo -n > $TEMPCONF diff --git a/tools/include/uapi/asm-generic/mman-common.h b/tools/include/uapi/asm-generic/mman-common.h index c160a5354eb6..f94f65d429be 100644 --- a/tools/include/uapi/asm-generic/mman-common.h +++ b/tools/include/uapi/asm-generic/mman-common.h @@ -11,6 +11,8 @@ #define PROT_WRITE 0x2 /* page can be written */ #define PROT_EXEC 0x4 /* page can be executed */ #define PROT_SEM 0x8 /* page may be used for atomic ops */ +/* 0x10 reserved for arch-specific use */ +/* 0x20 reserved for arch-specific use */ #define PROT_NONE 0x0 /* page can not be accessed */ #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */ diff --git a/tools/include/uapi/asm-generic/unistd.h b/tools/include/uapi/asm-generic/unistd.h index 1fc8faa6e973..3a3201e4618e 100644 --- a/tools/include/uapi/asm-generic/unistd.h +++ b/tools/include/uapi/asm-generic/unistd.h @@ -851,8 +851,13 @@ __SYSCALL(__NR_pidfd_open, sys_pidfd_open) __SYSCALL(__NR_clone3, sys_clone3) #endif +#define __NR_openat2 437 +__SYSCALL(__NR_openat2, sys_openat2) +#define __NR_pidfd_getfd 438 +__SYSCALL(__NR_pidfd_getfd, sys_pidfd_getfd) + #undef __NR_syscalls -#define __NR_syscalls 436 +#define __NR_syscalls 439 /* * 32 bit systems traditionally used different diff --git a/tools/include/uapi/drm/i915_drm.h b/tools/include/uapi/drm/i915_drm.h index 5400d7e057f1..829c0a48577f 100644 --- a/tools/include/uapi/drm/i915_drm.h +++ b/tools/include/uapi/drm/i915_drm.h @@ -395,6 +395,7 @@ typedef struct _drm_i915_sarea { #define DRM_IOCTL_I915_GEM_PWRITE DRM_IOW (DRM_COMMAND_BASE + DRM_I915_GEM_PWRITE, struct drm_i915_gem_pwrite) #define DRM_IOCTL_I915_GEM_MMAP DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_MMAP, struct drm_i915_gem_mmap) #define DRM_IOCTL_I915_GEM_MMAP_GTT DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_MMAP_GTT, struct drm_i915_gem_mmap_gtt) +#define DRM_IOCTL_I915_GEM_MMAP_OFFSET DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_MMAP_GTT, struct drm_i915_gem_mmap_offset) #define DRM_IOCTL_I915_GEM_SET_DOMAIN DRM_IOW (DRM_COMMAND_BASE + DRM_I915_GEM_SET_DOMAIN, struct drm_i915_gem_set_domain) #define DRM_IOCTL_I915_GEM_SW_FINISH DRM_IOW (DRM_COMMAND_BASE + DRM_I915_GEM_SW_FINISH, struct drm_i915_gem_sw_finish) #define DRM_IOCTL_I915_GEM_SET_TILING DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_SET_TILING, struct drm_i915_gem_set_tiling) @@ -793,6 +794,37 @@ struct drm_i915_gem_mmap_gtt { __u64 offset; }; +struct drm_i915_gem_mmap_offset { + /** Handle for the object being mapped. */ + __u32 handle; + __u32 pad; + /** + * Fake offset to use for subsequent mmap call + * + * This is a fixed-size type for 32/64 compatibility. + */ + __u64 offset; + + /** + * Flags for extended behaviour. + * + * It is mandatory that one of the MMAP_OFFSET types + * (GTT, WC, WB, UC, etc) should be included. + */ + __u64 flags; +#define I915_MMAP_OFFSET_GTT 0 +#define I915_MMAP_OFFSET_WC 1 +#define I915_MMAP_OFFSET_WB 2 +#define I915_MMAP_OFFSET_UC 3 + + /* + * Zero-terminated chain of extensions. + * + * No current extensions defined; mbz. + */ + __u64 extensions; +}; + struct drm_i915_gem_set_domain { /** Handle for the object */ __u32 handle; diff --git a/tools/include/uapi/linux/fcntl.h b/tools/include/uapi/linux/fcntl.h index 1f97b33c840e..ca88b7bce553 100644 --- a/tools/include/uapi/linux/fcntl.h +++ b/tools/include/uapi/linux/fcntl.h @@ -3,6 +3,7 @@ #define _UAPI_LINUX_FCNTL_H #include <asm/fcntl.h> +#include <linux/openat2.h> #define F_SETLEASE (F_LINUX_SPECIFIC_BASE + 0) #define F_GETLEASE (F_LINUX_SPECIFIC_BASE + 1) @@ -100,5 +101,4 @@ #define AT_RECURSIVE 0x8000 /* Apply to the entire subtree */ - #endif /* _UAPI_LINUX_FCNTL_H */ diff --git a/tools/include/uapi/linux/fscrypt.h b/tools/include/uapi/linux/fscrypt.h index 1beb174ad950..0d8a6f47711c 100644 --- a/tools/include/uapi/linux/fscrypt.h +++ b/tools/include/uapi/linux/fscrypt.h @@ -8,6 +8,7 @@ #ifndef _UAPI_LINUX_FSCRYPT_H #define _UAPI_LINUX_FSCRYPT_H +#include <linux/ioctl.h> #include <linux/types.h> /* Encryption policy flags */ @@ -109,11 +110,22 @@ struct fscrypt_key_specifier { } u; }; +/* + * Payload of Linux keyring key of type "fscrypt-provisioning", referenced by + * fscrypt_add_key_arg::key_id as an alternative to fscrypt_add_key_arg::raw. + */ +struct fscrypt_provisioning_key_payload { + __u32 type; + __u32 __reserved; + __u8 raw[]; +}; + /* Struct passed to FS_IOC_ADD_ENCRYPTION_KEY */ struct fscrypt_add_key_arg { struct fscrypt_key_specifier key_spec; __u32 raw_size; - __u32 __reserved[9]; + __u32 key_id; + __u32 __reserved[8]; __u8 raw[]; }; diff --git a/tools/include/uapi/linux/kvm.h b/tools/include/uapi/linux/kvm.h index f0a16b4adbbd..4b95f9a31a2f 100644 --- a/tools/include/uapi/linux/kvm.h +++ b/tools/include/uapi/linux/kvm.h @@ -1009,6 +1009,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_PPC_GUEST_DEBUG_SSTEP 176 #define KVM_CAP_ARM_NISV_TO_USER 177 #define KVM_CAP_ARM_INJECT_EXT_DABT 178 +#define KVM_CAP_S390_VCPU_RESETS 179 #ifdef KVM_CAP_IRQ_ROUTING @@ -1473,6 +1474,10 @@ struct kvm_enc_region { /* Available with KVM_CAP_ARM_SVE */ #define KVM_ARM_VCPU_FINALIZE _IOW(KVMIO, 0xc2, int) +/* Available with KVM_CAP_S390_VCPU_RESETS */ +#define KVM_S390_NORMAL_RESET _IO(KVMIO, 0xc3) +#define KVM_S390_CLEAR_RESET _IO(KVMIO, 0xc4) + /* Secure Encrypted Virtualization command */ enum sev_cmd_id { /* Guest initialization commands */ diff --git a/tools/include/uapi/linux/openat2.h b/tools/include/uapi/linux/openat2.h new file mode 100644 index 000000000000..58b1eb711360 --- /dev/null +++ b/tools/include/uapi/linux/openat2.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef _UAPI_LINUX_OPENAT2_H +#define _UAPI_LINUX_OPENAT2_H + +#include <linux/types.h> + +/* + * Arguments for how openat2(2) should open the target path. If only @flags and + * @mode are non-zero, then openat2(2) operates very similarly to openat(2). + * + * However, unlike openat(2), unknown or invalid bits in @flags result in + * -EINVAL rather than being silently ignored. @mode must be zero unless one of + * {O_CREAT, O_TMPFILE} are set. + * + * @flags: O_* flags. + * @mode: O_CREAT/O_TMPFILE file mode. + * @resolve: RESOLVE_* flags. + */ +struct open_how { + __u64 flags; + __u64 mode; + __u64 resolve; +}; + +/* how->resolve flags for openat2(2). */ +#define RESOLVE_NO_XDEV 0x01 /* Block mount-point crossings + (includes bind-mounts). */ +#define RESOLVE_NO_MAGICLINKS 0x02 /* Block traversal through procfs-style + "magic-links". */ +#define RESOLVE_NO_SYMLINKS 0x04 /* Block traversal through all symlinks + (implies OEXT_NO_MAGICLINKS) */ +#define RESOLVE_BENEATH 0x08 /* Block "lexical" trickery like + "..", symlinks, and absolute + paths which escape the dirfd. */ +#define RESOLVE_IN_ROOT 0x10 /* Make all jumps to "/" and ".." + be scoped inside the dirfd + (similar to chroot(2)). */ + +#endif /* _UAPI_LINUX_OPENAT2_H */ diff --git a/tools/include/uapi/linux/prctl.h b/tools/include/uapi/linux/prctl.h index 7da1b37b27aa..07b4f8131e36 100644 --- a/tools/include/uapi/linux/prctl.h +++ b/tools/include/uapi/linux/prctl.h @@ -234,4 +234,8 @@ struct prctl_mm_map { #define PR_GET_TAGGED_ADDR_CTRL 56 # define PR_TAGGED_ADDR_ENABLE (1UL << 0) +/* Control reclaim behavior when allocating memory */ +#define PR_SET_IO_FLUSHER 57 +#define PR_GET_IO_FLUSHER 58 + #endif /* _LINUX_PRCTL_H */ diff --git a/tools/include/uapi/linux/sched.h b/tools/include/uapi/linux/sched.h index 4a0217832464..2e3bc22c6f20 100644 --- a/tools/include/uapi/linux/sched.h +++ b/tools/include/uapi/linux/sched.h @@ -36,6 +36,12 @@ /* Flags for the clone3() syscall. */ #define CLONE_CLEAR_SIGHAND 0x100000000ULL /* Clear any signal handler and reset to SIG_DFL. */ +/* + * cloning flags intersect with CSIGNAL so can be used with unshare and clone3 + * syscalls only: + */ +#define CLONE_NEWTIME 0x00000080 /* New time namespace */ + #ifndef __ASSEMBLY__ /** * struct clone_args - arguments for the clone3 syscall diff --git a/tools/include/uapi/sound/asound.h b/tools/include/uapi/sound/asound.h index df1153cea0b7..535a7229e1d9 100644 --- a/tools/include/uapi/sound/asound.h +++ b/tools/include/uapi/sound/asound.h @@ -26,7 +26,9 @@ #if defined(__KERNEL__) || defined(__linux__) #include <linux/types.h> +#include <asm/byteorder.h> #else +#include <endian.h> #include <sys/ioctl.h> #endif @@ -154,7 +156,7 @@ struct snd_hwdep_dsp_image { * * *****************************************************************************/ -#define SNDRV_PCM_VERSION SNDRV_PROTOCOL_VERSION(2, 0, 14) +#define SNDRV_PCM_VERSION SNDRV_PROTOCOL_VERSION(2, 0, 15) typedef unsigned long snd_pcm_uframes_t; typedef signed long snd_pcm_sframes_t; @@ -301,7 +303,9 @@ typedef int __bitwise snd_pcm_subformat_t; #define SNDRV_PCM_INFO_DRAIN_TRIGGER 0x40000000 /* internal kernel flag - trigger in drain */ #define SNDRV_PCM_INFO_FIFO_IN_FRAMES 0x80000000 /* internal kernel flag - FIFO size is in frames */ - +#if (__BITS_PER_LONG == 32 && defined(__USE_TIME_BITS64)) || defined __KERNEL__ +#define __SND_STRUCT_TIME64 +#endif typedef int __bitwise snd_pcm_state_t; #define SNDRV_PCM_STATE_OPEN ((__force snd_pcm_state_t) 0) /* stream is open */ @@ -317,8 +321,17 @@ typedef int __bitwise snd_pcm_state_t; enum { SNDRV_PCM_MMAP_OFFSET_DATA = 0x00000000, - SNDRV_PCM_MMAP_OFFSET_STATUS = 0x80000000, - SNDRV_PCM_MMAP_OFFSET_CONTROL = 0x81000000, + SNDRV_PCM_MMAP_OFFSET_STATUS_OLD = 0x80000000, + SNDRV_PCM_MMAP_OFFSET_CONTROL_OLD = 0x81000000, + SNDRV_PCM_MMAP_OFFSET_STATUS_NEW = 0x82000000, + SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW = 0x83000000, +#ifdef __SND_STRUCT_TIME64 + SNDRV_PCM_MMAP_OFFSET_STATUS = SNDRV_PCM_MMAP_OFFSET_STATUS_NEW, + SNDRV_PCM_MMAP_OFFSET_CONTROL = SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW, +#else + SNDRV_PCM_MMAP_OFFSET_STATUS = SNDRV_PCM_MMAP_OFFSET_STATUS_OLD, + SNDRV_PCM_MMAP_OFFSET_CONTROL = SNDRV_PCM_MMAP_OFFSET_CONTROL_OLD, +#endif }; union snd_pcm_sync_id { @@ -456,8 +469,13 @@ enum { SNDRV_PCM_AUDIO_TSTAMP_TYPE_LAST = SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK_SYNCHRONIZED }; +#ifndef __KERNEL__ +/* explicit padding avoids incompatibility between i386 and x86-64 */ +typedef struct { unsigned char pad[sizeof(time_t) - sizeof(int)]; } __time_pad; + struct snd_pcm_status { snd_pcm_state_t state; /* stream state */ + __time_pad pad1; /* align to timespec */ struct timespec trigger_tstamp; /* time when stream was started/stopped/paused */ struct timespec tstamp; /* reference timestamp */ snd_pcm_uframes_t appl_ptr; /* appl ptr */ @@ -473,17 +491,48 @@ struct snd_pcm_status { __u32 audio_tstamp_accuracy; /* in ns units, only valid if indicated in audio_tstamp_data */ unsigned char reserved[52-2*sizeof(struct timespec)]; /* must be filled with zero */ }; +#endif + +/* + * For mmap operations, we need the 64-bit layout, both for compat mode, + * and for y2038 compatibility. For 64-bit applications, the two definitions + * are identical, so we keep the traditional version. + */ +#ifdef __SND_STRUCT_TIME64 +#define __snd_pcm_mmap_status64 snd_pcm_mmap_status +#define __snd_pcm_mmap_control64 snd_pcm_mmap_control +#define __snd_pcm_sync_ptr64 snd_pcm_sync_ptr +#ifdef __KERNEL__ +#define __snd_timespec64 __kernel_timespec +#else +#define __snd_timespec64 timespec +#endif +struct __snd_timespec { + __s32 tv_sec; + __s32 tv_nsec; +}; +#else +#define __snd_pcm_mmap_status snd_pcm_mmap_status +#define __snd_pcm_mmap_control snd_pcm_mmap_control +#define __snd_pcm_sync_ptr snd_pcm_sync_ptr +#define __snd_timespec timespec +struct __snd_timespec64 { + __s64 tv_sec; + __s64 tv_nsec; +}; -struct snd_pcm_mmap_status { +#endif + +struct __snd_pcm_mmap_status { snd_pcm_state_t state; /* RO: state - SNDRV_PCM_STATE_XXXX */ int pad1; /* Needed for 64 bit alignment */ snd_pcm_uframes_t hw_ptr; /* RO: hw ptr (0...boundary-1) */ - struct timespec tstamp; /* Timestamp */ + struct __snd_timespec tstamp; /* Timestamp */ snd_pcm_state_t suspended_state; /* RO: suspended stream state */ - struct timespec audio_tstamp; /* from sample counter or wall clock */ + struct __snd_timespec audio_tstamp; /* from sample counter or wall clock */ }; -struct snd_pcm_mmap_control { +struct __snd_pcm_mmap_control { snd_pcm_uframes_t appl_ptr; /* RW: appl ptr (0...boundary-1) */ snd_pcm_uframes_t avail_min; /* RW: min available frames for wakeup */ }; @@ -492,14 +541,59 @@ struct snd_pcm_mmap_control { #define SNDRV_PCM_SYNC_PTR_APPL (1<<1) /* get appl_ptr from driver (r/w op) */ #define SNDRV_PCM_SYNC_PTR_AVAIL_MIN (1<<2) /* get avail_min from driver */ -struct snd_pcm_sync_ptr { +struct __snd_pcm_sync_ptr { unsigned int flags; union { - struct snd_pcm_mmap_status status; + struct __snd_pcm_mmap_status status; + unsigned char reserved[64]; + } s; + union { + struct __snd_pcm_mmap_control control; + unsigned char reserved[64]; + } c; +}; + +#if defined(__BYTE_ORDER) ? __BYTE_ORDER == __BIG_ENDIAN : defined(__BIG_ENDIAN) +typedef char __pad_before_uframe[sizeof(__u64) - sizeof(snd_pcm_uframes_t)]; +typedef char __pad_after_uframe[0]; +#endif + +#if defined(__BYTE_ORDER) ? __BYTE_ORDER == __LITTLE_ENDIAN : defined(__LITTLE_ENDIAN) +typedef char __pad_before_uframe[0]; +typedef char __pad_after_uframe[sizeof(__u64) - sizeof(snd_pcm_uframes_t)]; +#endif + +struct __snd_pcm_mmap_status64 { + snd_pcm_state_t state; /* RO: state - SNDRV_PCM_STATE_XXXX */ + __u32 pad1; /* Needed for 64 bit alignment */ + __pad_before_uframe __pad1; + snd_pcm_uframes_t hw_ptr; /* RO: hw ptr (0...boundary-1) */ + __pad_after_uframe __pad2; + struct __snd_timespec64 tstamp; /* Timestamp */ + snd_pcm_state_t suspended_state;/* RO: suspended stream state */ + __u32 pad3; /* Needed for 64 bit alignment */ + struct __snd_timespec64 audio_tstamp; /* sample counter or wall clock */ +}; + +struct __snd_pcm_mmap_control64 { + __pad_before_uframe __pad1; + snd_pcm_uframes_t appl_ptr; /* RW: appl ptr (0...boundary-1) */ + __pad_before_uframe __pad2; + + __pad_before_uframe __pad3; + snd_pcm_uframes_t avail_min; /* RW: min available frames for wakeup */ + __pad_after_uframe __pad4; +}; + +struct __snd_pcm_sync_ptr64 { + __u32 flags; + __u32 pad1; + union { + struct __snd_pcm_mmap_status64 status; unsigned char reserved[64]; } s; union { - struct snd_pcm_mmap_control control; + struct __snd_pcm_mmap_control64 control; unsigned char reserved[64]; } c; }; @@ -584,6 +678,8 @@ enum { #define SNDRV_PCM_IOCTL_STATUS _IOR('A', 0x20, struct snd_pcm_status) #define SNDRV_PCM_IOCTL_DELAY _IOR('A', 0x21, snd_pcm_sframes_t) #define SNDRV_PCM_IOCTL_HWSYNC _IO('A', 0x22) +#define __SNDRV_PCM_IOCTL_SYNC_PTR _IOWR('A', 0x23, struct __snd_pcm_sync_ptr) +#define __SNDRV_PCM_IOCTL_SYNC_PTR64 _IOWR('A', 0x23, struct __snd_pcm_sync_ptr64) #define SNDRV_PCM_IOCTL_SYNC_PTR _IOWR('A', 0x23, struct snd_pcm_sync_ptr) #define SNDRV_PCM_IOCTL_STATUS_EXT _IOWR('A', 0x24, struct snd_pcm_status) #define SNDRV_PCM_IOCTL_CHANNEL_INFO _IOR('A', 0x32, struct snd_pcm_channel_info) @@ -614,7 +710,7 @@ enum { * Raw MIDI section - /dev/snd/midi?? */ -#define SNDRV_RAWMIDI_VERSION SNDRV_PROTOCOL_VERSION(2, 0, 0) +#define SNDRV_RAWMIDI_VERSION SNDRV_PROTOCOL_VERSION(2, 0, 1) enum { SNDRV_RAWMIDI_STREAM_OUTPUT = 0, @@ -648,13 +744,16 @@ struct snd_rawmidi_params { unsigned char reserved[16]; /* reserved for future use */ }; +#ifndef __KERNEL__ struct snd_rawmidi_status { int stream; + __time_pad pad1; struct timespec tstamp; /* Timestamp */ size_t avail; /* available bytes */ size_t xruns; /* count of overruns since last status (in bytes) */ unsigned char reserved[16]; /* reserved for future use */ }; +#endif #define SNDRV_RAWMIDI_IOCTL_PVERSION _IOR('W', 0x00, int) #define SNDRV_RAWMIDI_IOCTL_INFO _IOR('W', 0x01, struct snd_rawmidi_info) @@ -667,7 +766,7 @@ struct snd_rawmidi_status { * Timer section - /dev/snd/timer */ -#define SNDRV_TIMER_VERSION SNDRV_PROTOCOL_VERSION(2, 0, 6) +#define SNDRV_TIMER_VERSION SNDRV_PROTOCOL_VERSION(2, 0, 7) enum { SNDRV_TIMER_CLASS_NONE = -1, @@ -761,6 +860,7 @@ struct snd_timer_params { unsigned char reserved[60]; /* reserved */ }; +#ifndef __KERNEL__ struct snd_timer_status { struct timespec tstamp; /* Timestamp - last update */ unsigned int resolution; /* current period resolution in ns */ @@ -769,10 +869,11 @@ struct snd_timer_status { unsigned int queue; /* used queue size */ unsigned char reserved[64]; /* reserved */ }; +#endif #define SNDRV_TIMER_IOCTL_PVERSION _IOR('T', 0x00, int) #define SNDRV_TIMER_IOCTL_NEXT_DEVICE _IOWR('T', 0x01, struct snd_timer_id) -#define SNDRV_TIMER_IOCTL_TREAD _IOW('T', 0x02, int) +#define SNDRV_TIMER_IOCTL_TREAD_OLD _IOW('T', 0x02, int) #define SNDRV_TIMER_IOCTL_GINFO _IOWR('T', 0x03, struct snd_timer_ginfo) #define SNDRV_TIMER_IOCTL_GPARAMS _IOW('T', 0x04, struct snd_timer_gparams) #define SNDRV_TIMER_IOCTL_GSTATUS _IOWR('T', 0x05, struct snd_timer_gstatus) @@ -785,6 +886,15 @@ struct snd_timer_status { #define SNDRV_TIMER_IOCTL_STOP _IO('T', 0xa1) #define SNDRV_TIMER_IOCTL_CONTINUE _IO('T', 0xa2) #define SNDRV_TIMER_IOCTL_PAUSE _IO('T', 0xa3) +#define SNDRV_TIMER_IOCTL_TREAD64 _IOW('T', 0xa4, int) + +#if __BITS_PER_LONG == 64 +#define SNDRV_TIMER_IOCTL_TREAD SNDRV_TIMER_IOCTL_TREAD_OLD +#else +#define SNDRV_TIMER_IOCTL_TREAD ((sizeof(__kernel_long_t) >= sizeof(time_t)) ? \ + SNDRV_TIMER_IOCTL_TREAD_OLD : \ + SNDRV_TIMER_IOCTL_TREAD64) +#endif struct snd_timer_read { unsigned int resolution; @@ -810,11 +920,15 @@ enum { SNDRV_TIMER_EVENT_MRESUME = SNDRV_TIMER_EVENT_RESUME + 10, }; +#ifndef __KERNEL__ struct snd_timer_tread { int event; + __time_pad pad1; struct timespec tstamp; unsigned int val; + __time_pad pad2; }; +#endif /**************************************************************************** * * @@ -822,7 +936,7 @@ struct snd_timer_tread { * * ****************************************************************************/ -#define SNDRV_CTL_VERSION SNDRV_PROTOCOL_VERSION(2, 0, 7) +#define SNDRV_CTL_VERSION SNDRV_PROTOCOL_VERSION(2, 0, 8) struct snd_ctl_card_info { int card; /* card number */ @@ -860,7 +974,7 @@ typedef int __bitwise snd_ctl_elem_iface_t; #define SNDRV_CTL_ELEM_ACCESS_WRITE (1<<1) #define SNDRV_CTL_ELEM_ACCESS_READWRITE (SNDRV_CTL_ELEM_ACCESS_READ|SNDRV_CTL_ELEM_ACCESS_WRITE) #define SNDRV_CTL_ELEM_ACCESS_VOLATILE (1<<2) /* control value may be changed without a notification */ -#define SNDRV_CTL_ELEM_ACCESS_TIMESTAMP (1<<3) /* when was control changed */ +// (1 << 3) is unused. #define SNDRV_CTL_ELEM_ACCESS_TLV_READ (1<<4) /* TLV read is possible */ #define SNDRV_CTL_ELEM_ACCESS_TLV_WRITE (1<<5) /* TLV write is possible */ #define SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE (SNDRV_CTL_ELEM_ACCESS_TLV_READ|SNDRV_CTL_ELEM_ACCESS_TLV_WRITE) @@ -926,11 +1040,7 @@ struct snd_ctl_elem_info { } enumerated; unsigned char reserved[128]; } value; - union { - unsigned short d[4]; /* dimensions */ - unsigned short *d_ptr; /* indirect - obsoleted */ - } dimen; - unsigned char reserved[64-4*sizeof(unsigned short)]; + unsigned char reserved[64]; }; struct snd_ctl_elem_value { @@ -955,8 +1065,7 @@ struct snd_ctl_elem_value { } bytes; struct snd_aes_iec958 iec958; } value; /* RO */ - struct timespec tstamp; - unsigned char reserved[128-sizeof(struct timespec)]; + unsigned char reserved[128]; }; struct snd_ctl_tlv { diff --git a/tools/perf/arch/arm64/util/header.c b/tools/perf/arch/arm64/util/header.c index a32e4b72a98f..d730666ab95d 100644 --- a/tools/perf/arch/arm64/util/header.c +++ b/tools/perf/arch/arm64/util/header.c @@ -1,8 +1,10 @@ #include <stdio.h> #include <stdlib.h> #include <perf/cpumap.h> +#include <util/cpumap.h> #include <internal/cpumap.h> #include <api/fs/fs.h> +#include <errno.h> #include "debug.h" #include "header.h" @@ -12,26 +14,21 @@ #define MIDR_VARIANT_SHIFT 20 #define MIDR_VARIANT_MASK (0xf << MIDR_VARIANT_SHIFT) -char *get_cpuid_str(struct perf_pmu *pmu) +static int _get_cpuid(char *buf, size_t sz, struct perf_cpu_map *cpus) { - char *buf = NULL; - char path[PATH_MAX]; const char *sysfs = sysfs__mountpoint(); - int cpu; u64 midr = 0; - struct perf_cpu_map *cpus; - FILE *file; + int cpu; - if (!sysfs || !pmu || !pmu->cpus) - return NULL; + if (!sysfs || sz < MIDR_SIZE) + return EINVAL; - buf = malloc(MIDR_SIZE); - if (!buf) - return NULL; + cpus = perf_cpu_map__get(cpus); - /* read midr from list of cpus mapped to this pmu */ - cpus = perf_cpu_map__get(pmu->cpus); for (cpu = 0; cpu < perf_cpu_map__nr(cpus); cpu++) { + char path[PATH_MAX]; + FILE *file; + scnprintf(path, PATH_MAX, "%s/devices/system/cpu/cpu%d"MIDR, sysfs, cpus->map[cpu]); @@ -57,12 +54,48 @@ char *get_cpuid_str(struct perf_pmu *pmu) break; } - if (!midr) { + perf_cpu_map__put(cpus); + + if (!midr) + return EINVAL; + + return 0; +} + +int get_cpuid(char *buf, size_t sz) +{ + struct perf_cpu_map *cpus = perf_cpu_map__new(NULL); + int ret; + + if (!cpus) + return EINVAL; + + ret = _get_cpuid(buf, sz, cpus); + + perf_cpu_map__put(cpus); + + return ret; +} + +char *get_cpuid_str(struct perf_pmu *pmu) +{ + char *buf = NULL; + int res; + + if (!pmu || !pmu->cpus) + return NULL; + + buf = malloc(MIDR_SIZE); + if (!buf) + return NULL; + + /* read midr from list of cpus mapped to this pmu */ + res = _get_cpuid(buf, MIDR_SIZE, pmu->cpus); + if (res) { pr_err("failed to get cpuid string for PMU %s\n", pmu->name); free(buf); buf = NULL; } - perf_cpu_map__put(cpus); return buf; } diff --git a/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl b/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl index c29976eca4a8..44d510bc9b78 100644 --- a/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl +++ b/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl @@ -357,6 +357,8 @@ 433 common fspick __x64_sys_fspick 434 common pidfd_open __x64_sys_pidfd_open 435 common clone3 __x64_sys_clone3/ptregs +437 common openat2 __x64_sys_openat2 +438 common pidfd_getfd __x64_sys_pidfd_getfd # # x32-specific system call numbers start at 512 to avoid cache impact diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 46a72ecac427..01d542007c8b 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -1065,7 +1065,9 @@ static struct syscall_fmt syscall_fmts[] = { { .name = "poll", .timeout = true, }, { .name = "ppoll", .timeout = true, }, { .name = "prctl", - .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ }, + .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ + .strtoul = STUL_STRARRAY, + .parm = &strarray__prctl_options, }, [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ }, [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, }, { .name = "pread", .alias = "pread64", }, diff --git a/tools/perf/check-headers.sh b/tools/perf/check-headers.sh index 68039a96c1dc..bfb21d049e6c 100755 --- a/tools/perf/check-headers.sh +++ b/tools/perf/check-headers.sh @@ -13,6 +13,7 @@ include/uapi/linux/kcmp.h include/uapi/linux/kvm.h include/uapi/linux/in.h include/uapi/linux/mount.h +include/uapi/linux/openat2.h include/uapi/linux/perf_event.h include/uapi/linux/prctl.h include/uapi/linux/sched.h diff --git a/tools/perf/trace/beauty/beauty.h b/tools/perf/trace/beauty/beauty.h index 5a61043c2ff7..d6dfe68a7612 100644 --- a/tools/perf/trace/beauty/beauty.h +++ b/tools/perf/trace/beauty/beauty.h @@ -213,6 +213,8 @@ size_t syscall_arg__scnprintf_x86_arch_prctl_code(char *bf, size_t size, struct size_t syscall_arg__scnprintf_prctl_option(char *bf, size_t size, struct syscall_arg *arg); #define SCA_PRCTL_OPTION syscall_arg__scnprintf_prctl_option +extern struct strarray strarray__prctl_options; + size_t syscall_arg__scnprintf_prctl_arg2(char *bf, size_t size, struct syscall_arg *arg); #define SCA_PRCTL_ARG2 syscall_arg__scnprintf_prctl_arg2 diff --git a/tools/perf/trace/beauty/prctl.c b/tools/perf/trace/beauty/prctl.c index ba2179abed00..6fe5ad5f5d3a 100644 --- a/tools/perf/trace/beauty/prctl.c +++ b/tools/perf/trace/beauty/prctl.c @@ -11,9 +11,10 @@ #include "trace/beauty/generated/prctl_option_array.c" +DEFINE_STRARRAY(prctl_options, "PR_"); + static size_t prctl__scnprintf_option(int option, char *bf, size_t size, bool show_prefix) { - static DEFINE_STRARRAY(prctl_options, "PR_"); return strarray__scnprintf(&strarray__prctl_options, bf, size, "%d", show_prefix, option); } diff --git a/tools/perf/util/llvm-utils.c b/tools/perf/util/llvm-utils.c index eae47c2509eb..b5af680fc667 100644 --- a/tools/perf/util/llvm-utils.c +++ b/tools/perf/util/llvm-utils.c @@ -288,6 +288,7 @@ static const char *kinc_fetch_script = "obj-y := dummy.o\n" "\\$(obj)/%.o: \\$(src)/%.c\n" "\t@echo -n \"\\$(NOSTDINC_FLAGS) \\$(LINUXINCLUDE) \\$(EXTRA_CFLAGS)\"\n" +"\t\\$(CC) -c -o \\$@ \\$<\n" "EOF\n" "touch $TMPDIR/dummy.c\n" "make -s -C $KBUILD_DIR M=$TMPDIR $KBUILD_OPTS dummy.o 2>/dev/null\n" diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index c8c5410315e8..fb5c2cd44d30 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -686,6 +686,7 @@ static struct dso *machine__findnew_module_dso(struct machine *machine, dso__set_module_info(dso, m, machine); dso__set_long_name(dso, strdup(filename), true); + dso->kernel = DSO_TYPE_KERNEL; } dso__get(dso); @@ -726,9 +727,17 @@ static int machine__process_ksymbol_register(struct machine *machine, struct map *map = maps__find(&machine->kmaps, event->ksymbol.addr); if (!map) { - map = dso__new_map(event->ksymbol.name); - if (!map) + struct dso *dso = dso__new(event->ksymbol.name); + + if (dso) { + dso->kernel = DSO_TYPE_KERNEL; + map = map__new2(0, dso); + } + + if (!dso || !map) { + dso__put(dso); return -ENOMEM; + } map->start = event->ksymbol.addr; map->end = map->start + event->ksymbol.len; @@ -972,7 +981,6 @@ int machine__create_extra_kernel_map(struct machine *machine, kmap = map__kmap(map); - kmap->kmaps = &machine->kmaps; strlcpy(kmap->name, xm->name, KMAP_NAME_LEN); maps__insert(&machine->kmaps, map); @@ -1082,9 +1090,6 @@ int __weak machine__create_extra_kernel_maps(struct machine *machine __maybe_unu static int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) { - struct kmap *kmap; - struct map *map; - /* In case of renewal the kernel map, destroy previous one */ machine__destroy_kernel_maps(machine); @@ -1093,14 +1098,7 @@ __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) return -1; machine->vmlinux_map->map_ip = machine->vmlinux_map->unmap_ip = identity__map_ip; - map = machine__kernel_map(machine); - kmap = map__kmap(map); - if (!kmap) - return -1; - - kmap->kmaps = &machine->kmaps; - maps__insert(&machine->kmaps, map); - + maps__insert(&machine->kmaps, machine->vmlinux_map); return 0; } diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c index f67960bedebb..a08ca276098e 100644 --- a/tools/perf/util/map.c +++ b/tools/perf/util/map.c @@ -375,8 +375,13 @@ struct symbol *map__find_symbol_by_name(struct map *map, const char *name) struct map *map__clone(struct map *from) { - struct map *map = memdup(from, sizeof(*map)); + size_t size = sizeof(struct map); + struct map *map; + + if (from->dso && from->dso->kernel) + size += sizeof(struct kmap); + map = memdup(from, size); if (map != NULL) { refcount_set(&map->refcnt, 1); RB_CLEAR_NODE(&map->rb_node); @@ -538,6 +543,16 @@ void maps__insert(struct maps *maps, struct map *map) __maps__insert(maps, map); ++maps->nr_maps; + if (map->dso && map->dso->kernel) { + struct kmap *kmap = map__kmap(map); + + if (kmap) + kmap->kmaps = maps; + else + pr_err("Internal error: kernel dso with non kernel map\n"); + } + + /* * If we already performed some search by name, then we need to add the just * inserted map and resort. diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c index 2c41d47f6f83..90d23cc3c8d4 100644 --- a/tools/perf/util/stat-shadow.c +++ b/tools/perf/util/stat-shadow.c @@ -18,7 +18,6 @@ * AGGR_NONE: Use matching CPU * AGGR_THREAD: Not supported? */ -static bool have_frontend_stalled; struct runtime_stat rt_stat; struct stats walltime_nsecs_stats; @@ -144,7 +143,6 @@ void runtime_stat__exit(struct runtime_stat *st) void perf_stat__init_shadow_stats(void) { - have_frontend_stalled = pmu_have_event("cpu", "stalled-cycles-frontend"); runtime_stat__init(&rt_stat); } @@ -853,10 +851,6 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config, print_metric(config, ctxp, NULL, "%7.2f ", "stalled cycles per insn", ratio); - } else if (have_frontend_stalled) { - out->new_line(config, ctxp); - print_metric(config, ctxp, NULL, "%7.2f ", - "stalled cycles per insn", 0); } } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES)) { if (runtime_stat_n(st, STAT_BRANCHES, ctx, cpu) != 0) diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 3b379b1296f1..1077013d8ce2 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -635,9 +635,12 @@ out: static bool symbol__is_idle(const char *name) { const char * const idle_symbols[] = { + "acpi_idle_do_entry", + "acpi_processor_ffh_cstate_enter", "arch_cpu_idle", "cpu_idle", "cpu_startup_entry", + "idle_cpu", "intel_idle", "default_idle", "native_safe_halt", @@ -651,13 +654,17 @@ static bool symbol__is_idle(const char *name) NULL }; int i; + static struct strlist *idle_symbols_list; - for (i = 0; idle_symbols[i]; i++) { - if (!strcmp(idle_symbols[i], name)) - return true; - } + if (idle_symbols_list) + return strlist__has_entry(idle_symbols_list, name); - return false; + idle_symbols_list = strlist__new(NULL, NULL); + + for (i = 0; idle_symbols[i]; i++) + strlist__add(idle_symbols_list, idle_symbols[i]); + + return strlist__has_entry(idle_symbols_list, name); } static int map__process_kallsym_symbol(void *arg, const char *name, diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index 67abc1dd50ee..d91c53b726e6 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -8,7 +8,7 @@ KSFT_KHDR_INSTALL := 1 UNAME_M := $(shell uname -m) LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/sparsebit.c -LIBKVM_x86_64 = lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/ucall.c +LIBKVM_x86_64 = lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/svm.c lib/x86_64/ucall.c LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c LIBKVM_s390x = lib/s390x/processor.c lib/s390x/ucall.c @@ -26,6 +26,7 @@ TEST_GEN_PROGS_x86_64 += x86_64/vmx_dirty_log_test TEST_GEN_PROGS_x86_64 += x86_64/vmx_set_nested_state_test TEST_GEN_PROGS_x86_64 += x86_64/vmx_tsc_adjust_test TEST_GEN_PROGS_x86_64 += x86_64/xss_msr_test +TEST_GEN_PROGS_x86_64 += x86_64/svm_vmcall_test TEST_GEN_PROGS_x86_64 += clear_dirty_log_test TEST_GEN_PROGS_x86_64 += dirty_log_test TEST_GEN_PROGS_x86_64 += kvm_create_max_vcpus diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h index aa6451b3f740..7428513a4c68 100644 --- a/tools/testing/selftests/kvm/include/x86_64/processor.h +++ b/tools/testing/selftests/kvm/include/x86_64/processor.h @@ -36,24 +36,24 @@ #define X86_CR4_SMAP (1ul << 21) #define X86_CR4_PKE (1ul << 22) -/* The enum values match the intruction encoding of each register */ -enum x86_register { - RAX = 0, - RCX, - RDX, - RBX, - RSP, - RBP, - RSI, - RDI, - R8, - R9, - R10, - R11, - R12, - R13, - R14, - R15, +/* General Registers in 64-Bit Mode */ +struct gpr64_regs { + u64 rax; + u64 rcx; + u64 rdx; + u64 rbx; + u64 rsp; + u64 rbp; + u64 rsi; + u64 rdi; + u64 r8; + u64 r9; + u64 r10; + u64 r11; + u64 r12; + u64 r13; + u64 r14; + u64 r15; }; struct desc64 { @@ -220,20 +220,20 @@ static inline void set_cr4(uint64_t val) __asm__ __volatile__("mov %0, %%cr4" : : "r" (val) : "memory"); } -static inline uint64_t get_gdt_base(void) +static inline struct desc_ptr get_gdt(void) { struct desc_ptr gdt; __asm__ __volatile__("sgdt %[gdt]" : /* output */ [gdt]"=m"(gdt)); - return gdt.address; + return gdt; } -static inline uint64_t get_idt_base(void) +static inline struct desc_ptr get_idt(void) { struct desc_ptr idt; __asm__ __volatile__("sidt %[idt]" : /* output */ [idt]"=m"(idt)); - return idt.address; + return idt; } #define SET_XMM(__var, __xmm) \ diff --git a/tools/testing/selftests/kvm/include/x86_64/svm.h b/tools/testing/selftests/kvm/include/x86_64/svm.h new file mode 100644 index 000000000000..f4ea2355dbc2 --- /dev/null +++ b/tools/testing/selftests/kvm/include/x86_64/svm.h @@ -0,0 +1,297 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * tools/testing/selftests/kvm/include/x86_64/svm.h + * This is a copy of arch/x86/include/asm/svm.h + * + */ + +#ifndef SELFTEST_KVM_SVM_H +#define SELFTEST_KVM_SVM_H + +enum { + INTERCEPT_INTR, + INTERCEPT_NMI, + INTERCEPT_SMI, + INTERCEPT_INIT, + INTERCEPT_VINTR, + INTERCEPT_SELECTIVE_CR0, + INTERCEPT_STORE_IDTR, + INTERCEPT_STORE_GDTR, + INTERCEPT_STORE_LDTR, + INTERCEPT_STORE_TR, + INTERCEPT_LOAD_IDTR, + INTERCEPT_LOAD_GDTR, + INTERCEPT_LOAD_LDTR, + INTERCEPT_LOAD_TR, + INTERCEPT_RDTSC, + INTERCEPT_RDPMC, + INTERCEPT_PUSHF, + INTERCEPT_POPF, + INTERCEPT_CPUID, + INTERCEPT_RSM, + INTERCEPT_IRET, + INTERCEPT_INTn, + INTERCEPT_INVD, + INTERCEPT_PAUSE, + INTERCEPT_HLT, + INTERCEPT_INVLPG, + INTERCEPT_INVLPGA, + INTERCEPT_IOIO_PROT, + INTERCEPT_MSR_PROT, + INTERCEPT_TASK_SWITCH, + INTERCEPT_FERR_FREEZE, + INTERCEPT_SHUTDOWN, + INTERCEPT_VMRUN, + INTERCEPT_VMMCALL, + INTERCEPT_VMLOAD, + INTERCEPT_VMSAVE, + INTERCEPT_STGI, + INTERCEPT_CLGI, + INTERCEPT_SKINIT, + INTERCEPT_RDTSCP, + INTERCEPT_ICEBP, + INTERCEPT_WBINVD, + INTERCEPT_MONITOR, + INTERCEPT_MWAIT, + INTERCEPT_MWAIT_COND, + INTERCEPT_XSETBV, + INTERCEPT_RDPRU, +}; + + +struct __attribute__ ((__packed__)) vmcb_control_area { + u32 intercept_cr; + u32 intercept_dr; + u32 intercept_exceptions; + u64 intercept; + u8 reserved_1[40]; + u16 pause_filter_thresh; + u16 pause_filter_count; + u64 iopm_base_pa; + u64 msrpm_base_pa; + u64 tsc_offset; + u32 asid; + u8 tlb_ctl; + u8 reserved_2[3]; + u32 int_ctl; + u32 int_vector; + u32 int_state; + u8 reserved_3[4]; + u32 exit_code; + u32 exit_code_hi; + u64 exit_info_1; + u64 exit_info_2; + u32 exit_int_info; + u32 exit_int_info_err; + u64 nested_ctl; + u64 avic_vapic_bar; + u8 reserved_4[8]; + u32 event_inj; + u32 event_inj_err; + u64 nested_cr3; + u64 virt_ext; + u32 clean; + u32 reserved_5; + u64 next_rip; + u8 insn_len; + u8 insn_bytes[15]; + u64 avic_backing_page; /* Offset 0xe0 */ + u8 reserved_6[8]; /* Offset 0xe8 */ + u64 avic_logical_id; /* Offset 0xf0 */ + u64 avic_physical_id; /* Offset 0xf8 */ + u8 reserved_7[768]; +}; + + +#define TLB_CONTROL_DO_NOTHING 0 +#define TLB_CONTROL_FLUSH_ALL_ASID 1 +#define TLB_CONTROL_FLUSH_ASID 3 +#define TLB_CONTROL_FLUSH_ASID_LOCAL 7 + +#define V_TPR_MASK 0x0f + +#define V_IRQ_SHIFT 8 +#define V_IRQ_MASK (1 << V_IRQ_SHIFT) + +#define V_GIF_SHIFT 9 +#define V_GIF_MASK (1 << V_GIF_SHIFT) + +#define V_INTR_PRIO_SHIFT 16 +#define V_INTR_PRIO_MASK (0x0f << V_INTR_PRIO_SHIFT) + +#define V_IGN_TPR_SHIFT 20 +#define V_IGN_TPR_MASK (1 << V_IGN_TPR_SHIFT) + +#define V_INTR_MASKING_SHIFT 24 +#define V_INTR_MASKING_MASK (1 << V_INTR_MASKING_SHIFT) + +#define V_GIF_ENABLE_SHIFT 25 +#define V_GIF_ENABLE_MASK (1 << V_GIF_ENABLE_SHIFT) + +#define AVIC_ENABLE_SHIFT 31 +#define AVIC_ENABLE_MASK (1 << AVIC_ENABLE_SHIFT) + +#define LBR_CTL_ENABLE_MASK BIT_ULL(0) +#define VIRTUAL_VMLOAD_VMSAVE_ENABLE_MASK BIT_ULL(1) + +#define SVM_INTERRUPT_SHADOW_MASK 1 + +#define SVM_IOIO_STR_SHIFT 2 +#define SVM_IOIO_REP_SHIFT 3 +#define SVM_IOIO_SIZE_SHIFT 4 +#define SVM_IOIO_ASIZE_SHIFT 7 + +#define SVM_IOIO_TYPE_MASK 1 +#define SVM_IOIO_STR_MASK (1 << SVM_IOIO_STR_SHIFT) +#define SVM_IOIO_REP_MASK (1 << SVM_IOIO_REP_SHIFT) +#define SVM_IOIO_SIZE_MASK (7 << SVM_IOIO_SIZE_SHIFT) +#define SVM_IOIO_ASIZE_MASK (7 << SVM_IOIO_ASIZE_SHIFT) + +#define SVM_VM_CR_VALID_MASK 0x001fULL +#define SVM_VM_CR_SVM_LOCK_MASK 0x0008ULL +#define SVM_VM_CR_SVM_DIS_MASK 0x0010ULL + +#define SVM_NESTED_CTL_NP_ENABLE BIT(0) +#define SVM_NESTED_CTL_SEV_ENABLE BIT(1) + +struct __attribute__ ((__packed__)) vmcb_seg { + u16 selector; + u16 attrib; + u32 limit; + u64 base; +}; + +struct __attribute__ ((__packed__)) vmcb_save_area { + struct vmcb_seg es; + struct vmcb_seg cs; + struct vmcb_seg ss; + struct vmcb_seg ds; + struct vmcb_seg fs; + struct vmcb_seg gs; + struct vmcb_seg gdtr; + struct vmcb_seg ldtr; + struct vmcb_seg idtr; + struct vmcb_seg tr; + u8 reserved_1[43]; + u8 cpl; + u8 reserved_2[4]; + u64 efer; + u8 reserved_3[112]; + u64 cr4; + u64 cr3; + u64 cr0; + u64 dr7; + u64 dr6; + u64 rflags; + u64 rip; + u8 reserved_4[88]; + u64 rsp; + u8 reserved_5[24]; + u64 rax; + u64 star; + u64 lstar; + u64 cstar; + u64 sfmask; + u64 kernel_gs_base; + u64 sysenter_cs; + u64 sysenter_esp; + u64 sysenter_eip; + u64 cr2; + u8 reserved_6[32]; + u64 g_pat; + u64 dbgctl; + u64 br_from; + u64 br_to; + u64 last_excp_from; + u64 last_excp_to; +}; + +struct __attribute__ ((__packed__)) vmcb { + struct vmcb_control_area control; + struct vmcb_save_area save; +}; + +#define SVM_CPUID_FUNC 0x8000000a + +#define SVM_VM_CR_SVM_DISABLE 4 + +#define SVM_SELECTOR_S_SHIFT 4 +#define SVM_SELECTOR_DPL_SHIFT 5 +#define SVM_SELECTOR_P_SHIFT 7 +#define SVM_SELECTOR_AVL_SHIFT 8 +#define SVM_SELECTOR_L_SHIFT 9 +#define SVM_SELECTOR_DB_SHIFT 10 +#define SVM_SELECTOR_G_SHIFT 11 + +#define SVM_SELECTOR_TYPE_MASK (0xf) +#define SVM_SELECTOR_S_MASK (1 << SVM_SELECTOR_S_SHIFT) +#define SVM_SELECTOR_DPL_MASK (3 << SVM_SELECTOR_DPL_SHIFT) +#define SVM_SELECTOR_P_MASK (1 << SVM_SELECTOR_P_SHIFT) +#define SVM_SELECTOR_AVL_MASK (1 << SVM_SELECTOR_AVL_SHIFT) +#define SVM_SELECTOR_L_MASK (1 << SVM_SELECTOR_L_SHIFT) +#define SVM_SELECTOR_DB_MASK (1 << SVM_SELECTOR_DB_SHIFT) +#define SVM_SELECTOR_G_MASK (1 << SVM_SELECTOR_G_SHIFT) + +#define SVM_SELECTOR_WRITE_MASK (1 << 1) +#define SVM_SELECTOR_READ_MASK SVM_SELECTOR_WRITE_MASK +#define SVM_SELECTOR_CODE_MASK (1 << 3) + +#define INTERCEPT_CR0_READ 0 +#define INTERCEPT_CR3_READ 3 +#define INTERCEPT_CR4_READ 4 +#define INTERCEPT_CR8_READ 8 +#define INTERCEPT_CR0_WRITE (16 + 0) +#define INTERCEPT_CR3_WRITE (16 + 3) +#define INTERCEPT_CR4_WRITE (16 + 4) +#define INTERCEPT_CR8_WRITE (16 + 8) + +#define INTERCEPT_DR0_READ 0 +#define INTERCEPT_DR1_READ 1 +#define INTERCEPT_DR2_READ 2 +#define INTERCEPT_DR3_READ 3 +#define INTERCEPT_DR4_READ 4 +#define INTERCEPT_DR5_READ 5 +#define INTERCEPT_DR6_READ 6 +#define INTERCEPT_DR7_READ 7 +#define INTERCEPT_DR0_WRITE (16 + 0) +#define INTERCEPT_DR1_WRITE (16 + 1) +#define INTERCEPT_DR2_WRITE (16 + 2) +#define INTERCEPT_DR3_WRITE (16 + 3) +#define INTERCEPT_DR4_WRITE (16 + 4) +#define INTERCEPT_DR5_WRITE (16 + 5) +#define INTERCEPT_DR6_WRITE (16 + 6) +#define INTERCEPT_DR7_WRITE (16 + 7) + +#define SVM_EVTINJ_VEC_MASK 0xff + +#define SVM_EVTINJ_TYPE_SHIFT 8 +#define SVM_EVTINJ_TYPE_MASK (7 << SVM_EVTINJ_TYPE_SHIFT) + +#define SVM_EVTINJ_TYPE_INTR (0 << SVM_EVTINJ_TYPE_SHIFT) +#define SVM_EVTINJ_TYPE_NMI (2 << SVM_EVTINJ_TYPE_SHIFT) +#define SVM_EVTINJ_TYPE_EXEPT (3 << SVM_EVTINJ_TYPE_SHIFT) +#define SVM_EVTINJ_TYPE_SOFT (4 << SVM_EVTINJ_TYPE_SHIFT) + +#define SVM_EVTINJ_VALID (1 << 31) +#define SVM_EVTINJ_VALID_ERR (1 << 11) + +#define SVM_EXITINTINFO_VEC_MASK SVM_EVTINJ_VEC_MASK +#define SVM_EXITINTINFO_TYPE_MASK SVM_EVTINJ_TYPE_MASK + +#define SVM_EXITINTINFO_TYPE_INTR SVM_EVTINJ_TYPE_INTR +#define SVM_EXITINTINFO_TYPE_NMI SVM_EVTINJ_TYPE_NMI +#define SVM_EXITINTINFO_TYPE_EXEPT SVM_EVTINJ_TYPE_EXEPT +#define SVM_EXITINTINFO_TYPE_SOFT SVM_EVTINJ_TYPE_SOFT + +#define SVM_EXITINTINFO_VALID SVM_EVTINJ_VALID +#define SVM_EXITINTINFO_VALID_ERR SVM_EVTINJ_VALID_ERR + +#define SVM_EXITINFOSHIFT_TS_REASON_IRET 36 +#define SVM_EXITINFOSHIFT_TS_REASON_JMP 38 +#define SVM_EXITINFOSHIFT_TS_HAS_ERROR_CODE 44 + +#define SVM_EXITINFO_REG_MASK 0x0F + +#define SVM_CR0_SELECTIVE_MASK (X86_CR0_TS | X86_CR0_MP) + +#endif /* SELFTEST_KVM_SVM_H */ diff --git a/tools/testing/selftests/kvm/include/x86_64/svm_util.h b/tools/testing/selftests/kvm/include/x86_64/svm_util.h new file mode 100644 index 000000000000..cd037917fece --- /dev/null +++ b/tools/testing/selftests/kvm/include/x86_64/svm_util.h @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * tools/testing/selftests/kvm/include/x86_64/svm_utils.h + * Header for nested SVM testing + * + * Copyright (C) 2020, Red Hat, Inc. + */ + +#ifndef SELFTEST_KVM_SVM_UTILS_H +#define SELFTEST_KVM_SVM_UTILS_H + +#include <stdint.h> +#include "svm.h" +#include "processor.h" + +#define CPUID_SVM_BIT 2 +#define CPUID_SVM BIT_ULL(CPUID_SVM_BIT) + +#define SVM_EXIT_VMMCALL 0x081 + +struct svm_test_data { + /* VMCB */ + struct vmcb *vmcb; /* gva */ + void *vmcb_hva; + uint64_t vmcb_gpa; + + /* host state-save area */ + struct vmcb_save_area *save_area; /* gva */ + void *save_area_hva; + uint64_t save_area_gpa; +}; + +struct svm_test_data *vcpu_alloc_svm(struct kvm_vm *vm, vm_vaddr_t *p_svm_gva); +void generic_svm_setup(struct svm_test_data *svm, void *guest_rip, void *guest_rsp); +void run_guest(struct vmcb *vmcb, uint64_t vmcb_gpa); +void nested_svm_check_supported(void); + +#endif /* SELFTEST_KVM_SVM_UTILS_H */ diff --git a/tools/testing/selftests/kvm/lib/x86_64/svm.c b/tools/testing/selftests/kvm/lib/x86_64/svm.c new file mode 100644 index 000000000000..6e05a8fc3fe0 --- /dev/null +++ b/tools/testing/selftests/kvm/lib/x86_64/svm.c @@ -0,0 +1,161 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * tools/testing/selftests/kvm/lib/x86_64/svm.c + * Helpers used for nested SVM testing + * Largely inspired from KVM unit test svm.c + * + * Copyright (C) 2020, Red Hat, Inc. + */ + +#include "test_util.h" +#include "kvm_util.h" +#include "../kvm_util_internal.h" +#include "processor.h" +#include "svm_util.h" + +struct gpr64_regs guest_regs; +u64 rflags; + +/* Allocate memory regions for nested SVM tests. + * + * Input Args: + * vm - The VM to allocate guest-virtual addresses in. + * + * Output Args: + * p_svm_gva - The guest virtual address for the struct svm_test_data. + * + * Return: + * Pointer to structure with the addresses of the SVM areas. + */ +struct svm_test_data * +vcpu_alloc_svm(struct kvm_vm *vm, vm_vaddr_t *p_svm_gva) +{ + vm_vaddr_t svm_gva = vm_vaddr_alloc(vm, getpagesize(), + 0x10000, 0, 0); + struct svm_test_data *svm = addr_gva2hva(vm, svm_gva); + + svm->vmcb = (void *)vm_vaddr_alloc(vm, getpagesize(), + 0x10000, 0, 0); + svm->vmcb_hva = addr_gva2hva(vm, (uintptr_t)svm->vmcb); + svm->vmcb_gpa = addr_gva2gpa(vm, (uintptr_t)svm->vmcb); + + svm->save_area = (void *)vm_vaddr_alloc(vm, getpagesize(), + 0x10000, 0, 0); + svm->save_area_hva = addr_gva2hva(vm, (uintptr_t)svm->save_area); + svm->save_area_gpa = addr_gva2gpa(vm, (uintptr_t)svm->save_area); + + *p_svm_gva = svm_gva; + return svm; +} + +static void vmcb_set_seg(struct vmcb_seg *seg, u16 selector, + u64 base, u32 limit, u32 attr) +{ + seg->selector = selector; + seg->attrib = attr; + seg->limit = limit; + seg->base = base; +} + +void generic_svm_setup(struct svm_test_data *svm, void *guest_rip, void *guest_rsp) +{ + struct vmcb *vmcb = svm->vmcb; + uint64_t vmcb_gpa = svm->vmcb_gpa; + struct vmcb_save_area *save = &vmcb->save; + struct vmcb_control_area *ctrl = &vmcb->control; + u32 data_seg_attr = 3 | SVM_SELECTOR_S_MASK | SVM_SELECTOR_P_MASK + | SVM_SELECTOR_DB_MASK | SVM_SELECTOR_G_MASK; + u32 code_seg_attr = 9 | SVM_SELECTOR_S_MASK | SVM_SELECTOR_P_MASK + | SVM_SELECTOR_L_MASK | SVM_SELECTOR_G_MASK; + uint64_t efer; + + efer = rdmsr(MSR_EFER); + wrmsr(MSR_EFER, efer | EFER_SVME); + wrmsr(MSR_VM_HSAVE_PA, svm->save_area_gpa); + + memset(vmcb, 0, sizeof(*vmcb)); + asm volatile ("vmsave\n\t" : : "a" (vmcb_gpa) : "memory"); + vmcb_set_seg(&save->es, get_es(), 0, -1U, data_seg_attr); + vmcb_set_seg(&save->cs, get_cs(), 0, -1U, code_seg_attr); + vmcb_set_seg(&save->ss, get_ss(), 0, -1U, data_seg_attr); + vmcb_set_seg(&save->ds, get_ds(), 0, -1U, data_seg_attr); + vmcb_set_seg(&save->gdtr, 0, get_gdt().address, get_gdt().size, 0); + vmcb_set_seg(&save->idtr, 0, get_idt().address, get_idt().size, 0); + + ctrl->asid = 1; + save->cpl = 0; + save->efer = rdmsr(MSR_EFER); + asm volatile ("mov %%cr4, %0" : "=r"(save->cr4) : : "memory"); + asm volatile ("mov %%cr3, %0" : "=r"(save->cr3) : : "memory"); + asm volatile ("mov %%cr0, %0" : "=r"(save->cr0) : : "memory"); + asm volatile ("mov %%dr7, %0" : "=r"(save->dr7) : : "memory"); + asm volatile ("mov %%dr6, %0" : "=r"(save->dr6) : : "memory"); + asm volatile ("mov %%cr2, %0" : "=r"(save->cr2) : : "memory"); + save->g_pat = rdmsr(MSR_IA32_CR_PAT); + save->dbgctl = rdmsr(MSR_IA32_DEBUGCTLMSR); + ctrl->intercept = (1ULL << INTERCEPT_VMRUN) | + (1ULL << INTERCEPT_VMMCALL); + + vmcb->save.rip = (u64)guest_rip; + vmcb->save.rsp = (u64)guest_rsp; + guest_regs.rdi = (u64)svm; +} + +/* + * save/restore 64-bit general registers except rax, rip, rsp + * which are directly handed through the VMCB guest processor state + */ +#define SAVE_GPR_C \ + "xchg %%rbx, guest_regs+0x20\n\t" \ + "xchg %%rcx, guest_regs+0x10\n\t" \ + "xchg %%rdx, guest_regs+0x18\n\t" \ + "xchg %%rbp, guest_regs+0x30\n\t" \ + "xchg %%rsi, guest_regs+0x38\n\t" \ + "xchg %%rdi, guest_regs+0x40\n\t" \ + "xchg %%r8, guest_regs+0x48\n\t" \ + "xchg %%r9, guest_regs+0x50\n\t" \ + "xchg %%r10, guest_regs+0x58\n\t" \ + "xchg %%r11, guest_regs+0x60\n\t" \ + "xchg %%r12, guest_regs+0x68\n\t" \ + "xchg %%r13, guest_regs+0x70\n\t" \ + "xchg %%r14, guest_regs+0x78\n\t" \ + "xchg %%r15, guest_regs+0x80\n\t" + +#define LOAD_GPR_C SAVE_GPR_C + +/* + * selftests do not use interrupts so we dropped clgi/sti/cli/stgi + * for now. registers involved in LOAD/SAVE_GPR_C are eventually + * unmodified so they do not need to be in the clobber list. + */ +void run_guest(struct vmcb *vmcb, uint64_t vmcb_gpa) +{ + asm volatile ( + "vmload\n\t" + "mov rflags, %%r15\n\t" // rflags + "mov %%r15, 0x170(%[vmcb])\n\t" + "mov guest_regs, %%r15\n\t" // rax + "mov %%r15, 0x1f8(%[vmcb])\n\t" + LOAD_GPR_C + "vmrun\n\t" + SAVE_GPR_C + "mov 0x170(%[vmcb]), %%r15\n\t" // rflags + "mov %%r15, rflags\n\t" + "mov 0x1f8(%[vmcb]), %%r15\n\t" // rax + "mov %%r15, guest_regs\n\t" + "vmsave\n\t" + : : [vmcb] "r" (vmcb), [vmcb_gpa] "a" (vmcb_gpa) + : "r15", "memory"); +} + +void nested_svm_check_supported(void) +{ + struct kvm_cpuid_entry2 *entry = + kvm_get_supported_cpuid_entry(0x80000001); + + if (!(entry->ecx & CPUID_SVM)) { + fprintf(stderr, "nested SVM not enabled, skipping test\n"); + exit(KSFT_SKIP); + } +} + diff --git a/tools/testing/selftests/kvm/lib/x86_64/vmx.c b/tools/testing/selftests/kvm/lib/x86_64/vmx.c index 85064baf5e97..7aaa99ca4dbc 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/vmx.c +++ b/tools/testing/selftests/kvm/lib/x86_64/vmx.c @@ -288,9 +288,9 @@ static inline void init_vmcs_host_state(void) vmwrite(HOST_FS_BASE, rdmsr(MSR_FS_BASE)); vmwrite(HOST_GS_BASE, rdmsr(MSR_GS_BASE)); vmwrite(HOST_TR_BASE, - get_desc64_base((struct desc64 *)(get_gdt_base() + get_tr()))); - vmwrite(HOST_GDTR_BASE, get_gdt_base()); - vmwrite(HOST_IDTR_BASE, get_idt_base()); + get_desc64_base((struct desc64 *)(get_gdt().address + get_tr()))); + vmwrite(HOST_GDTR_BASE, get_gdt().address); + vmwrite(HOST_IDTR_BASE, get_idt().address); vmwrite(HOST_IA32_SYSENTER_ESP, rdmsr(MSR_IA32_SYSENTER_ESP)); vmwrite(HOST_IA32_SYSENTER_EIP, rdmsr(MSR_IA32_SYSENTER_EIP)); } diff --git a/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c b/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c new file mode 100644 index 000000000000..e280f68f6365 --- /dev/null +++ b/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * svm_vmcall_test + * + * Copyright (C) 2020, Red Hat, Inc. + * + * Nested SVM testing: VMCALL + */ + +#include "test_util.h" +#include "kvm_util.h" +#include "processor.h" +#include "svm_util.h" + +#define VCPU_ID 5 + +static struct kvm_vm *vm; + +static void l2_guest_code(struct svm_test_data *svm) +{ + __asm__ __volatile__("vmcall"); +} + +static void l1_guest_code(struct svm_test_data *svm) +{ + #define L2_GUEST_STACK_SIZE 64 + unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE]; + struct vmcb *vmcb = svm->vmcb; + + /* Prepare for L2 execution. */ + generic_svm_setup(svm, l2_guest_code, + &l2_guest_stack[L2_GUEST_STACK_SIZE]); + + run_guest(vmcb, svm->vmcb_gpa); + + GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL); + GUEST_DONE(); +} + +int main(int argc, char *argv[]) +{ + vm_vaddr_t svm_gva; + + nested_svm_check_supported(); + + vm = vm_create_default(VCPU_ID, 0, (void *) l1_guest_code); + vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid()); + + vcpu_alloc_svm(vm, &svm_gva); + vcpu_args_set(vm, VCPU_ID, 1, svm_gva); + + for (;;) { + volatile struct kvm_run *run = vcpu_state(vm, VCPU_ID); + struct ucall uc; + + vcpu_run(vm, VCPU_ID); + TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, + "Got exit_reason other than KVM_EXIT_IO: %u (%s)\n", + run->exit_reason, + exit_reason_str(run->exit_reason)); + + switch (get_ucall(vm, VCPU_ID, &uc)) { + case UCALL_ABORT: + TEST_ASSERT(false, "%s", + (const char *)uc.args[0]); + /* NOT REACHED */ + case UCALL_SYNC: + break; + case UCALL_DONE: + goto done; + default: + TEST_ASSERT(false, + "Unknown ucall 0x%x.", uc.cmd); + } + } +done: + kvm_vm_free(vm); + return 0; +} diff --git a/tools/testing/selftests/wireguard/netns.sh b/tools/testing/selftests/wireguard/netns.sh index f5ab1cda8bb5..138d46b3f330 100755 --- a/tools/testing/selftests/wireguard/netns.sh +++ b/tools/testing/selftests/wireguard/netns.sh @@ -24,6 +24,7 @@ set -e exec 3>&1 +export LANG=C export WG_HIDE_KEYS=never netns0="wg-test-$$-0" netns1="wg-test-$$-1" @@ -297,7 +298,17 @@ ip1 -4 rule add table main suppress_prefixlength 0 n1 ping -W 1 -c 100 -f 192.168.99.7 n1 ping -W 1 -c 100 -f abab::1111 +# Have ns2 NAT into wg0 packets from ns0, but return an icmp error along the right route. +n2 iptables -t nat -A POSTROUTING -s 10.0.0.0/24 -d 192.168.241.0/24 -j SNAT --to 192.168.241.2 +n0 iptables -t filter -A INPUT \! -s 10.0.0.0/24 -i vethrs -j DROP # Manual rpfilter just to be explicit. +n2 bash -c 'printf 1 > /proc/sys/net/ipv4/ip_forward' +ip0 -4 route add 192.168.241.1 via 10.0.0.100 +n2 wg set wg0 peer "$pub1" remove +[[ $(! n0 ping -W 1 -c 1 192.168.241.1 || false) == *"From 10.0.0.100 icmp_seq=1 Destination Host Unreachable"* ]] + n0 iptables -t nat -F +n0 iptables -t filter -F +n2 iptables -t nat -F ip0 link del vethrc ip0 link del vethrs ip1 link del wg0 diff --git a/virt/kvm/arm/vgic/vgic-mmio.c b/virt/kvm/arm/vgic/vgic-mmio.c index d656ebd5f9d4..97fb2a40e6ba 100644 --- a/virt/kvm/arm/vgic/vgic-mmio.c +++ b/virt/kvm/arm/vgic/vgic-mmio.c @@ -179,18 +179,6 @@ unsigned long vgic_mmio_read_pending(struct kvm_vcpu *vcpu, return value; } -/* - * This function will return the VCPU that performed the MMIO access and - * trapped from within the VM, and will return NULL if this is a userspace - * access. - * - * We can disable preemption locally around accessing the per-CPU variable, - * and use the resolved vcpu pointer after enabling preemption again, because - * even if the current thread is migrated to another CPU, reading the per-CPU - * value later will give us the same value as we update the per-CPU variable - * in the preempt notifier handlers. - */ - /* Must be called with irq->irq_lock held */ static void vgic_hw_irq_spending(struct kvm_vcpu *vcpu, struct vgic_irq *irq, bool is_uaccess) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 67ae2d5c37b2..70f03ce0e5c1 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -4409,12 +4409,22 @@ static void kvm_sched_out(struct preempt_notifier *pn, /** * kvm_get_running_vcpu - get the vcpu running on the current CPU. - * Thanks to preempt notifiers, this can also be called from - * preemptible context. + * + * We can disable preemption locally around accessing the per-CPU variable, + * and use the resolved vcpu pointer after enabling preemption again, + * because even if the current thread is migrated to another CPU, reading + * the per-CPU value later will give us the same value as we update the + * per-CPU variable in the preempt notifier handlers. */ struct kvm_vcpu *kvm_get_running_vcpu(void) { - return __this_cpu_read(kvm_running_vcpu); + struct kvm_vcpu *vcpu; + + preempt_disable(); + vcpu = __this_cpu_read(kvm_running_vcpu); + preempt_enable(); + + return vcpu; } /** |