diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/acpi/acpi_bus.h | 36 | ||||
| -rw-r--r-- | include/asm-generic/uaccess.h | 10 | ||||
| -rw-r--r-- | include/linux/acpi.h | 7 | ||||
| -rw-r--r-- | include/linux/context_tracking.h | 12 | ||||
| -rw-r--r-- | include/linux/kvm_host.h | 1 | ||||
| -rw-r--r-- | include/linux/math64.h | 80 | ||||
| -rw-r--r-- | include/linux/of_pci.h | 3 | ||||
| -rw-r--r-- | include/linux/property.h | 10 |
8 files changed, 113 insertions, 46 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index d11eff8a4efe..ad0a5ff3d4cd 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -390,39 +390,6 @@ struct acpi_data_node { struct completion kobj_done; }; -static inline bool acpi_check_dma(struct acpi_device *adev, bool *coherent) -{ - bool ret = false; - - if (!adev) - return ret; - - /** - * Currently, we only support _CCA=1 (i.e. coherent_dma=1) - * This should be equivalent to specifyig dma-coherent for - * a device in OF. - * - * For the case when _CCA=0 (i.e. coherent_dma=0 && cca_seen=1), - * There are two cases: - * case 1. Do not support and disable DMA. - * case 2. Support but rely on arch-specific cache maintenance for - * non-coherence DMA operations. - * Currently, we implement case 1 above. - * - * For the case when _CCA is missing (i.e. cca_seen=0) and - * platform specifies ACPI_CCA_REQUIRED, we do not support DMA, - * and fallback to arch-specific default handling. - * - * See acpi_init_coherency() for more info. - */ - if (adev->flags.coherent_dma) { - ret = true; - if (coherent) - *coherent = adev->flags.coherent_dma; - } - return ret; -} - static inline bool is_acpi_node(struct fwnode_handle *fwnode) { return fwnode && (fwnode->type == FWNODE_ACPI @@ -595,6 +562,9 @@ struct acpi_pci_root { /* helper */ +bool acpi_dma_supported(struct acpi_device *adev); +enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev); + struct acpi_device *acpi_find_child_device(struct acpi_device *parent, u64 address, bool check_children); int acpi_is_root_bridge(acpi_handle); diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h index 72d8803832ff..1bfa602958f2 100644 --- a/include/asm-generic/uaccess.h +++ b/include/asm-generic/uaccess.h @@ -163,9 +163,10 @@ static inline __must_check long __copy_to_user(void __user *to, #define put_user(x, ptr) \ ({ \ + void *__p = (ptr); \ might_fault(); \ - access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)) ? \ - __put_user(x, ptr) : \ + access_ok(VERIFY_WRITE, __p, sizeof(*ptr)) ? \ + __put_user((x), ((__typeof__(*(ptr)) *)__p)) : \ -EFAULT; \ }) @@ -225,9 +226,10 @@ extern int __put_user_bad(void) __attribute__((noreturn)); #define get_user(x, ptr) \ ({ \ + const void *__p = (ptr); \ might_fault(); \ - access_ok(VERIFY_READ, ptr, sizeof(*ptr)) ? \ - __get_user(x, ptr) : \ + access_ok(VERIFY_READ, __p, sizeof(*ptr)) ? \ + __get_user((x), (__typeof__(*(ptr)) *)__p) : \ -EFAULT; \ }) diff --git a/include/linux/acpi.h b/include/linux/acpi.h index ebfac2fe0c81..054833939995 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -601,11 +601,16 @@ static inline int acpi_device_modalias(struct device *dev, return -ENODEV; } -static inline bool acpi_check_dma(struct acpi_device *adev, bool *coherent) +static inline bool acpi_dma_supported(struct acpi_device *adev) { return false; } +static inline enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev) +{ + return DEV_DMA_NOT_SUPPORTED; +} + #define ACPI_PTR(_ptr) (NULL) #endif /* !CONFIG_ACPI */ diff --git a/include/linux/context_tracking.h b/include/linux/context_tracking.h index 008fc67d0d96..68b575afe5f5 100644 --- a/include/linux/context_tracking.h +++ b/include/linux/context_tracking.h @@ -10,6 +10,10 @@ #ifdef CONFIG_CONTEXT_TRACKING extern void context_tracking_cpu_set(int cpu); +/* Called with interrupts disabled. */ +extern void __context_tracking_enter(enum ctx_state state); +extern void __context_tracking_exit(enum ctx_state state); + extern void context_tracking_enter(enum ctx_state state); extern void context_tracking_exit(enum ctx_state state); extern void context_tracking_user_enter(void); @@ -18,13 +22,13 @@ extern void context_tracking_user_exit(void); static inline void user_enter(void) { if (context_tracking_is_enabled()) - context_tracking_user_enter(); + context_tracking_enter(CONTEXT_USER); } static inline void user_exit(void) { if (context_tracking_is_enabled()) - context_tracking_user_exit(); + context_tracking_exit(CONTEXT_USER); } static inline enum ctx_state exception_enter(void) @@ -88,13 +92,13 @@ static inline void guest_enter(void) current->flags |= PF_VCPU; if (context_tracking_is_enabled()) - context_tracking_enter(CONTEXT_GUEST); + __context_tracking_enter(CONTEXT_GUEST); } static inline void guest_exit(void) { if (context_tracking_is_enabled()) - context_tracking_exit(CONTEXT_GUEST); + __context_tracking_exit(CONTEXT_GUEST); if (vtime_accounting_enabled()) vtime_guest_exit(current); diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 242a6d2b53ff..5706a2108f0a 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1183,4 +1183,5 @@ void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *); int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq, uint32_t guest_irq, bool set); #endif /* CONFIG_HAVE_KVM_IRQ_BYPASS */ + #endif diff --git a/include/linux/math64.h b/include/linux/math64.h index c45c089bfdac..6e8b5b270ffe 100644 --- a/include/linux/math64.h +++ b/include/linux/math64.h @@ -142,6 +142,13 @@ static inline u64 mul_u64_u32_shr(u64 a, u32 mul, unsigned int shift) } #endif /* mul_u64_u32_shr */ +#ifndef mul_u64_u64_shr +static inline u64 mul_u64_u64_shr(u64 a, u64 mul, unsigned int shift) +{ + return (u64)(((unsigned __int128)a * mul) >> shift); +} +#endif /* mul_u64_u64_shr */ + #else #ifndef mul_u64_u32_shr @@ -161,6 +168,79 @@ static inline u64 mul_u64_u32_shr(u64 a, u32 mul, unsigned int shift) } #endif /* mul_u64_u32_shr */ +#ifndef mul_u64_u64_shr +static inline u64 mul_u64_u64_shr(u64 a, u64 b, unsigned int shift) +{ + union { + u64 ll; + struct { +#ifdef __BIG_ENDIAN + u32 high, low; +#else + u32 low, high; +#endif + } l; + } rl, rm, rn, rh, a0, b0; + u64 c; + + a0.ll = a; + b0.ll = b; + + rl.ll = (u64)a0.l.low * b0.l.low; + rm.ll = (u64)a0.l.low * b0.l.high; + rn.ll = (u64)a0.l.high * b0.l.low; + rh.ll = (u64)a0.l.high * b0.l.high; + + /* + * Each of these lines computes a 64-bit intermediate result into "c", + * starting at bits 32-95. The low 32-bits go into the result of the + * multiplication, the high 32-bits are carried into the next step. + */ + rl.l.high = c = (u64)rl.l.high + rm.l.low + rn.l.low; + rh.l.low = c = (c >> 32) + rm.l.high + rn.l.high + rh.l.low; + rh.l.high = (c >> 32) + rh.l.high; + + /* + * The 128-bit result of the multiplication is in rl.ll and rh.ll, + * shift it right and throw away the high part of the result. + */ + if (shift == 0) + return rl.ll; + if (shift < 64) + return (rl.ll >> shift) | (rh.ll << (64 - shift)); + return rh.ll >> (shift & 63); +} +#endif /* mul_u64_u64_shr */ + #endif +#ifndef mul_u64_u32_div +static inline u64 mul_u64_u32_div(u64 a, u32 mul, u32 divisor) +{ + union { + u64 ll; + struct { +#ifdef __BIG_ENDIAN + u32 high, low; +#else + u32 low, high; +#endif + } l; + } u, rl, rh; + + u.ll = a; + rl.ll = (u64)u.l.low * mul; + rh.ll = (u64)u.l.high * mul + rl.l.high; + + /* Bits 32-63 of the result will be in rh.l.low. */ + rl.l.high = do_div(rh.ll, divisor); + + /* Bits 0-31 of the result will be in rl.l.low. */ + do_div(rl.ll, divisor); + + rl.l.high = rh.l.low; + return rl.ll; +} +#endif /* mul_u64_u32_div */ + #endif /* _LINUX_MATH64_H */ diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h index 38c0533a3359..2c51ee78b1c0 100644 --- a/include/linux/of_pci.h +++ b/include/linux/of_pci.h @@ -16,7 +16,6 @@ int of_pci_get_devfn(struct device_node *np); int of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin); int of_pci_parse_bus_range(struct device_node *node, struct resource *res); int of_get_pci_domain_nr(struct device_node *node); -void of_pci_dma_configure(struct pci_dev *pci_dev); void of_pci_check_probe_only(void); #else static inline int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq) @@ -53,8 +52,6 @@ of_get_pci_domain_nr(struct device_node *node) return -1; } -static inline void of_pci_dma_configure(struct pci_dev *pci_dev) { } - static inline void of_pci_check_probe_only(void) { } #endif diff --git a/include/linux/property.h b/include/linux/property.h index 463de52fe891..0a3705a7c9f2 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -27,6 +27,12 @@ enum dev_prop_type { DEV_PROP_MAX, }; +enum dev_dma_attr { + DEV_DMA_NOT_SUPPORTED, + DEV_DMA_NON_COHERENT, + DEV_DMA_COHERENT, +}; + bool device_property_present(struct device *dev, const char *propname); int device_property_read_u8_array(struct device *dev, const char *propname, u8 *val, size_t nval); @@ -168,7 +174,9 @@ struct property_set { void device_add_property_set(struct device *dev, struct property_set *pset); -bool device_dma_is_coherent(struct device *dev); +bool device_dma_supported(struct device *dev); + +enum dev_dma_attr device_get_dma_attr(struct device *dev); int device_get_phy_mode(struct device *dev); |