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authorLinus Torvalds2022-11-11 09:24:03 -0800
committerLinus Torvalds2022-11-11 09:24:03 -0800
commit5be07b3fb53d14581f470745d129141b97d15614 (patch)
tree8f090382bbd3d67c0df7c5c9bdf18e2d97d30e34
parent91c77a6ec4e207085b9d4c27e6710f349d43195d (diff)
parente70af8d040d2b7904dca93d942ba23fb722e21b1 (diff)
Merge tag 'hyperv-fixes-signed-20221110' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux
Pull hyperv fixes from Wei Liu: - Fix TSC MSR write for root partition (Anirudh Rayabharam) - Fix definition of vector in pci-hyperv driver (Dexuan Cui) - A few other misc patches * tag 'hyperv-fixes-signed-20221110' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: PCI: hv: Fix the definition of vector in hv_compose_msi_msg() MAINTAINERS: remove sthemmin x86/hyperv: fix invalid writes to MSRs during root partition kexec clocksource/drivers/hyperv: add data structure for reference TSC MSR Drivers: hv: fix repeated words in comments x86/hyperv: Remove BUG_ON() for kmap_local_page()
-rw-r--r--MAINTAINERS1
-rw-r--r--arch/x86/hyperv/hv_init.c19
-rw-r--r--drivers/clocksource/hyperv_timer.c29
-rw-r--r--drivers/hv/hv_balloon.c2
-rw-r--r--drivers/pci/controller/pci-hyperv.c22
-rw-r--r--include/asm-generic/hyperv-tlfs.h9
6 files changed, 51 insertions, 31 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index a5896d328506..256f03904987 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9507,7 +9507,6 @@ F: drivers/media/i2c/hi847.c
Hyper-V/Azure CORE AND DRIVERS
M: "K. Y. Srinivasan" <kys@microsoft.com>
M: Haiyang Zhang <haiyangz@microsoft.com>
-M: Stephen Hemminger <sthemmin@microsoft.com>
M: Wei Liu <wei.liu@kernel.org>
M: Dexuan Cui <decui@microsoft.com>
L: linux-hyperv@vger.kernel.org
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index 29774126e931..f49bc3ec76e6 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -444,7 +444,7 @@ void __init hyperv_init(void)
if (hv_root_partition) {
struct page *pg;
- void *src, *dst;
+ void *src;
/*
* For the root partition, the hypervisor will set up its
@@ -459,13 +459,11 @@ void __init hyperv_init(void)
wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
pg = vmalloc_to_page(hv_hypercall_pg);
- dst = kmap_local_page(pg);
src = memremap(hypercall_msr.guest_physical_address << PAGE_SHIFT, PAGE_SIZE,
MEMREMAP_WB);
- BUG_ON(!(src && dst));
- memcpy(dst, src, HV_HYP_PAGE_SIZE);
+ BUG_ON(!src);
+ memcpy_to_page(pg, 0, src, HV_HYP_PAGE_SIZE);
memunmap(src);
- kunmap_local(dst);
} else {
hypercall_msr.guest_physical_address = vmalloc_to_pfn(hv_hypercall_pg);
wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
@@ -537,6 +535,7 @@ common_free:
void hyperv_cleanup(void)
{
union hv_x64_msr_hypercall_contents hypercall_msr;
+ union hv_reference_tsc_msr tsc_msr;
unregister_syscore_ops(&hv_syscore_ops);
@@ -552,12 +551,14 @@ void hyperv_cleanup(void)
hv_hypercall_pg = NULL;
/* Reset the hypercall page */
- hypercall_msr.as_uint64 = 0;
- wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
+ hypercall_msr.as_uint64 = hv_get_register(HV_X64_MSR_HYPERCALL);
+ hypercall_msr.enable = 0;
+ hv_set_register(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
/* Reset the TSC page */
- hypercall_msr.as_uint64 = 0;
- wrmsrl(HV_X64_MSR_REFERENCE_TSC, hypercall_msr.as_uint64);
+ tsc_msr.as_uint64 = hv_get_register(HV_X64_MSR_REFERENCE_TSC);
+ tsc_msr.enable = 0;
+ hv_set_register(HV_X64_MSR_REFERENCE_TSC, tsc_msr.as_uint64);
}
void hyperv_report_panic(struct pt_regs *regs, long err, bool in_die)
diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c
index bb47610bbd1c..18de1f439ffd 100644
--- a/drivers/clocksource/hyperv_timer.c
+++ b/drivers/clocksource/hyperv_timer.c
@@ -21,6 +21,7 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/acpi.h>
+#include <linux/hyperv.h>
#include <clocksource/hyperv_timer.h>
#include <asm/hyperv-tlfs.h>
#include <asm/mshyperv.h>
@@ -395,25 +396,25 @@ static u64 notrace read_hv_sched_clock_tsc(void)
static void suspend_hv_clock_tsc(struct clocksource *arg)
{
- u64 tsc_msr;
+ union hv_reference_tsc_msr tsc_msr;
/* Disable the TSC page */
- tsc_msr = hv_get_register(HV_REGISTER_REFERENCE_TSC);
- tsc_msr &= ~BIT_ULL(0);
- hv_set_register(HV_REGISTER_REFERENCE_TSC, tsc_msr);
+ tsc_msr.as_uint64 = hv_get_register(HV_REGISTER_REFERENCE_TSC);
+ tsc_msr.enable = 0;
+ hv_set_register(HV_REGISTER_REFERENCE_TSC, tsc_msr.as_uint64);
}
static void resume_hv_clock_tsc(struct clocksource *arg)
{
phys_addr_t phys_addr = virt_to_phys(&tsc_pg);
- u64 tsc_msr;
+ union hv_reference_tsc_msr tsc_msr;
/* Re-enable the TSC page */
- tsc_msr = hv_get_register(HV_REGISTER_REFERENCE_TSC);
- tsc_msr &= GENMASK_ULL(11, 0);
- tsc_msr |= BIT_ULL(0) | (u64)phys_addr;
- hv_set_register(HV_REGISTER_REFERENCE_TSC, tsc_msr);
+ tsc_msr.as_uint64 = hv_get_register(HV_REGISTER_REFERENCE_TSC);
+ tsc_msr.enable = 1;
+ tsc_msr.pfn = HVPFN_DOWN(phys_addr);
+ hv_set_register(HV_REGISTER_REFERENCE_TSC, tsc_msr.as_uint64);
}
#ifdef HAVE_VDSO_CLOCKMODE_HVCLOCK
@@ -495,7 +496,7 @@ static __always_inline void hv_setup_sched_clock(void *sched_clock) {}
static bool __init hv_init_tsc_clocksource(void)
{
- u64 tsc_msr;
+ union hv_reference_tsc_msr tsc_msr;
phys_addr_t phys_addr;
if (!(ms_hyperv.features & HV_MSR_REFERENCE_TSC_AVAILABLE))
@@ -530,10 +531,10 @@ static bool __init hv_init_tsc_clocksource(void)
* (which already has at least the low 12 bits set to zero since
* it is page aligned). Also set the "enable" bit, which is bit 0.
*/
- tsc_msr = hv_get_register(HV_REGISTER_REFERENCE_TSC);
- tsc_msr &= GENMASK_ULL(11, 0);
- tsc_msr = tsc_msr | 0x1 | (u64)phys_addr;
- hv_set_register(HV_REGISTER_REFERENCE_TSC, tsc_msr);
+ tsc_msr.as_uint64 = hv_get_register(HV_REGISTER_REFERENCE_TSC);
+ tsc_msr.enable = 1;
+ tsc_msr.pfn = HVPFN_DOWN(phys_addr);
+ hv_set_register(HV_REGISTER_REFERENCE_TSC, tsc_msr.as_uint64);
clocksource_register_hz(&hyperv_cs_tsc, NSEC_PER_SEC/100);
diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index fdf6decacf06..6c127f061f06 100644
--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -905,7 +905,7 @@ static unsigned long handle_pg_range(unsigned long pg_start,
* We have some residual hot add range
* that needs to be hot added; hot add
* it now. Hot add a multiple of
- * of HA_CHUNK that fully covers the pages
+ * HA_CHUNK that fully covers the pages
* we have.
*/
size = (has->end_pfn - has->ha_end_pfn);
diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
index e7c6f6629e7c..ba64284eaf9f 100644
--- a/drivers/pci/controller/pci-hyperv.c
+++ b/drivers/pci/controller/pci-hyperv.c
@@ -1614,7 +1614,7 @@ out:
static u32 hv_compose_msi_req_v1(
struct pci_create_interrupt *int_pkt, const struct cpumask *affinity,
- u32 slot, u8 vector, u8 vector_count)
+ u32 slot, u8 vector, u16 vector_count)
{
int_pkt->message_type.type = PCI_CREATE_INTERRUPT_MESSAGE;
int_pkt->wslot.slot = slot;
@@ -1642,7 +1642,7 @@ static int hv_compose_msi_req_get_cpu(const struct cpumask *affinity)
static u32 hv_compose_msi_req_v2(
struct pci_create_interrupt2 *int_pkt, const struct cpumask *affinity,
- u32 slot, u8 vector, u8 vector_count)
+ u32 slot, u8 vector, u16 vector_count)
{
int cpu;
@@ -1661,7 +1661,7 @@ static u32 hv_compose_msi_req_v2(
static u32 hv_compose_msi_req_v3(
struct pci_create_interrupt3 *int_pkt, const struct cpumask *affinity,
- u32 slot, u32 vector, u8 vector_count)
+ u32 slot, u32 vector, u16 vector_count)
{
int cpu;
@@ -1701,7 +1701,12 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
struct compose_comp_ctxt comp;
struct tran_int_desc *int_desc;
struct msi_desc *msi_desc;
- u8 vector, vector_count;
+ /*
+ * vector_count should be u16: see hv_msi_desc, hv_msi_desc2
+ * and hv_msi_desc3. vector must be u32: see hv_msi_desc3.
+ */
+ u16 vector_count;
+ u32 vector;
struct {
struct pci_packet pci_pkt;
union {
@@ -1767,6 +1772,11 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
vector_count = 1;
}
+ /*
+ * hv_compose_msi_req_v1 and v2 are for x86 only, meaning 'vector'
+ * can't exceed u8. Cast 'vector' down to u8 for v1/v2 explicitly
+ * for better readability.
+ */
memset(&ctxt, 0, sizeof(ctxt));
init_completion(&comp.comp_pkt.host_event);
ctxt.pci_pkt.completion_func = hv_pci_compose_compl;
@@ -1777,7 +1787,7 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
size = hv_compose_msi_req_v1(&ctxt.int_pkts.v1,
dest,
hpdev->desc.win_slot.slot,
- vector,
+ (u8)vector,
vector_count);
break;
@@ -1786,7 +1796,7 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
size = hv_compose_msi_req_v2(&ctxt.int_pkts.v2,
dest,
hpdev->desc.win_slot.slot,
- vector,
+ (u8)vector,
vector_count);
break;
diff --git a/include/asm-generic/hyperv-tlfs.h b/include/asm-generic/hyperv-tlfs.h
index fdce7a4cfc6f..b17c6eeb9afa 100644
--- a/include/asm-generic/hyperv-tlfs.h
+++ b/include/asm-generic/hyperv-tlfs.h
@@ -102,6 +102,15 @@ struct ms_hyperv_tsc_page {
volatile s64 tsc_offset;
} __packed;
+union hv_reference_tsc_msr {
+ u64 as_uint64;
+ struct {
+ u64 enable:1;
+ u64 reserved:11;
+ u64 pfn:52;
+ } __packed;
+};
+
/*
* The guest OS needs to register the guest ID with the hypervisor.
* The guest ID is a 64 bit entity and the structure of this ID is