u32 hv_max_vp_index;
EXPORT_SYMBOL_GPL(hv_max_vp_index);
- void *hv_alloc_hyperv_page(void)
- {
- BUILD_BUG_ON(PAGE_SIZE != HV_HYP_PAGE_SIZE);
-
- return (void *)__get_free_page(GFP_KERNEL);
- }
- EXPORT_SYMBOL_GPL(hv_alloc_hyperv_page);
-
- void *hv_alloc_hyperv_zeroed_page(void)
- {
- BUILD_BUG_ON(PAGE_SIZE != HV_HYP_PAGE_SIZE);
-
- return (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
- }
- EXPORT_SYMBOL_GPL(hv_alloc_hyperv_zeroed_page);
-
- void hv_free_hyperv_page(unsigned long addr)
- {
- free_page(addr);
- }
- EXPORT_SYMBOL_GPL(hv_free_hyperv_page);
-
static int hv_cpu_init(unsigned int cpu)
{
u64 msr_vp_index;
*output_arg = page_address(pg + 1);
}
- hv_get_vp_index(msr_vp_index);
+ msr_vp_index = hv_get_register(HV_REGISTER_VP_INDEX);
hv_vp_index[smp_processor_id()] = msr_vp_index;
static inline bool hv_reenlightenment_available(void)
{
/*
- * Check for required features and priviliges to make TSC frequency
+ * Check for required features and privileges to make TSC frequency
* change notifications work.
*/
return ms_hyperv.features & HV_ACCESS_FREQUENCY_MSRS &&
/*
* Reset the hypercall page as it is going to be invalidated
- * accross hibernation. Setting hv_hypercall_pg to NULL ensures
+ * across hibernation. Setting hv_hypercall_pg to NULL ensures
* that any subsequent hypercall operation fails safely instead of
* crashing due to an access of an invalid page. The hypercall page
* pointer is restored on resume.
* Ignore any errors in setting up stimer clockevents
* as we can run with the LAPIC timer as a fallback.
*/
- (void)hv_stimer_alloc();
+ (void)hv_stimer_alloc(false);
/*
* Still register the LAPIC timer, because the direct-mode STIMER is
local_irq_save(flags);
output_page = *this_cpu_ptr(hyperv_pcpu_output_arg);
status = hv_do_hypercall(HVCALL_GET_PARTITION_ID, NULL, output_page);
- if ((status & HV_HYPERCALL_RESULT_MASK) != HV_STATUS_SUCCESS) {
+ if (!hv_result_success(status)) {
/* No point in proceeding if this failed */
pr_err("Failed to get partition ID: %lld\n", status);
BUG();
x86_init.irqs.create_pci_msi_domain = hv_create_pci_msi_domain;
#endif
+ /* Query the VMs extended capability once, so that it can be cached. */
+ hv_query_ext_cap(0);
return;
remove_cpuhp_state:
}
EXPORT_SYMBOL_GPL(hyperv_report_panic);
- /**
- * hyperv_report_panic_msg - report panic message to Hyper-V
- * @pa: physical address of the panic page containing the message
- * @size: size of the message in the page
- */
- void hyperv_report_panic_msg(phys_addr_t pa, size_t size)
- {
- /*
- * P3 to contain the physical address of the panic page & P4 to
- * contain the size of the panic data in that page. Rest of the
- * registers are no-op when the NOTIFY_MSG flag is set.
- */
- wrmsrl(HV_X64_MSR_CRASH_P0, 0);
- wrmsrl(HV_X64_MSR_CRASH_P1, 0);
- wrmsrl(HV_X64_MSR_CRASH_P2, 0);
- wrmsrl(HV_X64_MSR_CRASH_P3, pa);
- wrmsrl(HV_X64_MSR_CRASH_P4, size);
-
- /*
- * Let Hyper-V know there is crash data available along with
- * the panic message.
- */
- wrmsrl(HV_X64_MSR_CRASH_CTL,
- (HV_CRASH_CTL_CRASH_NOTIFY | HV_CRASH_CTL_CRASH_NOTIFY_MSG));
- }
- EXPORT_SYMBOL_GPL(hyperv_report_panic_msg);
-
bool hv_is_hyperv_initialized(void)
{
union hv_x64_msr_hypercall_contents hypercall_msr;
enum hv_isolation_type hv_get_isolation_type(void)
{
- if (!(ms_hyperv.features_b & HV_ISOLATION))
+ if (!(ms_hyperv.priv_high & HV_ISOLATION))
return HV_ISOLATION_TYPE_NONE;
return FIELD_GET(HV_ISOLATION_TYPE, ms_hyperv.isolation_config_b);
}
return hv_get_isolation_type() != HV_ISOLATION_TYPE_NONE;
}
EXPORT_SYMBOL_GPL(hv_is_isolation_supported);
+
+ /* Bit mask of the extended capability to query: see HV_EXT_CAPABILITY_xxx */
+ bool hv_query_ext_cap(u64 cap_query)
+ {
+ /*
+ * The address of the 'hv_extended_cap' variable will be used as an
+ * output parameter to the hypercall below and so it should be
+ * compatible with 'virt_to_phys'. Which means, it's address should be
+ * directly mapped. Use 'static' to keep it compatible; stack variables
+ * can be virtually mapped, making them imcompatible with
+ * 'virt_to_phys'.
+ * Hypercall input/output addresses should also be 8-byte aligned.
+ */
+ static u64 hv_extended_cap __aligned(8);
+ static bool hv_extended_cap_queried;
+ u64 status;
+
+ /*
+ * Querying extended capabilities is an extended hypercall. Check if the
+ * partition supports extended hypercall, first.
+ */
+ if (!(ms_hyperv.priv_high & HV_ENABLE_EXTENDED_HYPERCALLS))
+ return false;
+
+ /* Extended capabilities do not change at runtime. */
+ if (hv_extended_cap_queried)
+ return hv_extended_cap & cap_query;
+
+ status = hv_do_hypercall(HV_EXT_CALL_QUERY_CAPABILITIES, NULL,
+ &hv_extended_cap);
+
+ /*
+ * The query extended capabilities hypercall should not fail under
+ * any normal circumstances. Avoid repeatedly making the hypercall, on
+ * error.
+ */
+ hv_extended_cap_queried = true;
+ status &= HV_HYPERCALL_RESULT_MASK;
+ if (status != HV_STATUS_SUCCESS) {
+ pr_err("Hyper-V: Extended query capabilities hypercall failed 0x%llx\n",
+ status);
+ return false;
+ }
+
+ return hv_extended_cap & cap_query;
+ }
+ EXPORT_SYMBOL_GPL(hv_query_ext_cap);
set_irq_regs(old_regs);
}
- int hv_setup_vmbus_irq(int irq, void (*handler)(void))
+ void hv_setup_vmbus_handler(void (*handler)(void))
{
- /*
- * The 'irq' argument is ignored on x86/x64 because a hard-coded
- * interrupt vector is used for Hyper-V interrupts.
- */
vmbus_handler = handler;
- return 0;
}
+ EXPORT_SYMBOL_GPL(hv_setup_vmbus_handler);
- void hv_remove_vmbus_irq(void)
+ void hv_remove_vmbus_handler(void)
{
/* We have no way to deallocate the interrupt gate */
vmbus_handler = NULL;
}
- EXPORT_SYMBOL_GPL(hv_setup_vmbus_irq);
- EXPORT_SYMBOL_GPL(hv_remove_vmbus_irq);
+ EXPORT_SYMBOL_GPL(hv_remove_vmbus_handler);
/*
* Routines to do per-architecture handling of stimer0
set_irq_regs(old_regs);
}
- int hv_setup_stimer0_irq(int *irq, int *vector, void (*handler)(void))
+ /* For x86/x64, override weak placeholders in hyperv_timer.c */
+ void hv_setup_stimer0_handler(void (*handler)(void))
{
- *vector = HYPERV_STIMER0_VECTOR;
- *irq = -1; /* Unused on x86/x64 */
hv_stimer0_handler = handler;
- return 0;
}
- EXPORT_SYMBOL_GPL(hv_setup_stimer0_irq);
- void hv_remove_stimer0_irq(int irq)
+ void hv_remove_stimer0_handler(void)
{
/* We have no way to deallocate the interrupt gate */
hv_stimer0_handler = NULL;
}
- EXPORT_SYMBOL_GPL(hv_remove_stimer0_irq);
void hv_setup_kexec_handler(void (*handler)(void))
{
#ifdef CONFIG_X86_LOCAL_APIC
/*
* Prior to WS2016 Debug-VM sends NMIs to all CPUs which makes
- * it dificult to process CHANNELMSG_UNLOAD in case of crash. Handle
+ * it difficult to process CHANNELMSG_UNLOAD in case of crash. Handle
* unknown NMI on the first CPU which gets it.
*/
static int hv_nmi_unknown(unsigned int val, struct pt_regs *regs)
* Extract the features and hints
*/
ms_hyperv.features = cpuid_eax(HYPERV_CPUID_FEATURES);
- ms_hyperv.features_b = cpuid_ebx(HYPERV_CPUID_FEATURES);
+ ms_hyperv.priv_high = cpuid_ebx(HYPERV_CPUID_FEATURES);
ms_hyperv.misc_features = cpuid_edx(HYPERV_CPUID_FEATURES);
ms_hyperv.hints = cpuid_eax(HYPERV_CPUID_ENLIGHTMENT_INFO);
- pr_info("Hyper-V: features 0x%x, hints 0x%x, misc 0x%x\n",
- ms_hyperv.features, ms_hyperv.hints, ms_hyperv.misc_features);
+ pr_info("Hyper-V: privilege flags low 0x%x, high 0x%x, hints 0x%x, misc 0x%x\n",
+ ms_hyperv.features, ms_hyperv.priv_high, ms_hyperv.hints,
+ ms_hyperv.misc_features);
ms_hyperv.max_vp_index = cpuid_eax(HYPERV_CPUID_IMPLEMENT_LIMITS);
ms_hyperv.max_lp_index = cpuid_ebx(HYPERV_CPUID_IMPLEMENT_LIMITS);
x86_platform.calibrate_cpu = hv_get_tsc_khz;
}
- if (ms_hyperv.features_b & HV_ISOLATION) {
+ if (ms_hyperv.priv_high & HV_ISOLATION) {
ms_hyperv.isolation_config_a = cpuid_eax(HYPERV_CPUID_ISOLATION_CONFIG);
ms_hyperv.isolation_config_b = cpuid_ebx(HYPERV_CPUID_ISOLATION_CONFIG);
/*
* Hyper-V doesn't provide irq remapping for IO-APIC. To enable x2apic,
- * set x2apic destination mode to physcial mode when x2apic is available
+ * set x2apic destination mode to physical mode when x2apic is available
* and Hyper-V IOMMU driver makes sure cpus assigned with IO-APIC irqs
* have 8-bit APIC id.
*/
#include <linux/sched_clock.h>
#include <linux/mm.h>
#include <linux/cpuhotplug.h>
+ #include <linux/interrupt.h>
+ #include <linux/irq.h>
+ #include <linux/acpi.h>
#include <clocksource/hyperv_timer.h>
#include <asm/hyperv-tlfs.h>
#include <asm/mshyperv.h>
*/
static bool direct_mode_enabled;
- static int stimer0_irq;
- static int stimer0_vector;
+ static int stimer0_irq = -1;
static int stimer0_message_sint;
+ static DEFINE_PER_CPU(long, stimer0_evt);
/*
- * ISR for when stimer0 is operating in Direct Mode. Direct Mode
- * does not use VMbus or any VMbus messages, so process here and not
- * in the VMbus driver code.
+ * Common code for stimer0 interrupts coming via Direct Mode or
+ * as a VMbus message.
*/
void hv_stimer0_isr(void)
{
}
EXPORT_SYMBOL_GPL(hv_stimer0_isr);
+ /*
+ * stimer0 interrupt handler for architectures that support
+ * per-cpu interrupts, which also implies Direct Mode.
+ */
+ static irqreturn_t hv_stimer0_percpu_isr(int irq, void *dev_id)
+ {
+ hv_stimer0_isr();
+ return IRQ_HANDLED;
+ }
+
static int hv_ce_set_next_event(unsigned long delta,
struct clock_event_device *evt)
{
current_tick = hv_read_reference_counter();
current_tick += delta;
- hv_init_timer(0, current_tick);
+ hv_set_register(HV_REGISTER_STIMER0_COUNT, current_tick);
return 0;
}
static int hv_ce_shutdown(struct clock_event_device *evt)
{
- hv_init_timer(0, 0);
- hv_init_timer_config(0, 0);
- if (direct_mode_enabled)
- hv_disable_stimer0_percpu_irq(stimer0_irq);
+ hv_set_register(HV_REGISTER_STIMER0_COUNT, 0);
+ hv_set_register(HV_REGISTER_STIMER0_CONFIG, 0);
+ if (direct_mode_enabled && stimer0_irq >= 0)
+ disable_percpu_irq(stimer0_irq);
return 0;
}
* on the specified hardware vector/IRQ.
*/
timer_cfg.direct_mode = 1;
- timer_cfg.apic_vector = stimer0_vector;
- hv_enable_stimer0_percpu_irq(stimer0_irq);
+ timer_cfg.apic_vector = HYPERV_STIMER0_VECTOR;
+ if (stimer0_irq >= 0)
+ enable_percpu_irq(stimer0_irq, IRQ_TYPE_NONE);
} else {
/*
* When it expires, the timer will generate a VMbus message,
timer_cfg.direct_mode = 0;
timer_cfg.sintx = stimer0_message_sint;
}
- hv_init_timer_config(0, timer_cfg.as_uint64);
+ hv_set_register(HV_REGISTER_STIMER0_CONFIG, timer_cfg.as_uint64);
return 0;
}
}
EXPORT_SYMBOL_GPL(hv_stimer_cleanup);
+ /*
+ * These placeholders are overridden by arch specific code on
+ * architectures that need special setup of the stimer0 IRQ because
+ * they don't support per-cpu IRQs (such as x86/x64).
+ */
+ void __weak hv_setup_stimer0_handler(void (*handler)(void))
+ {
+ };
+
+ void __weak hv_remove_stimer0_handler(void)
+ {
+ };
+
+ /* Called only on architectures with per-cpu IRQs (i.e., not x86/x64) */
+ static int hv_setup_stimer0_irq(void)
+ {
+ int ret;
+
+ ret = acpi_register_gsi(NULL, HYPERV_STIMER0_VECTOR,
+ ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_HIGH);
+ if (ret < 0) {
+ pr_err("Can't register Hyper-V stimer0 GSI. Error %d", ret);
+ return ret;
+ }
+ stimer0_irq = ret;
+
+ ret = request_percpu_irq(stimer0_irq, hv_stimer0_percpu_isr,
+ "Hyper-V stimer0", &stimer0_evt);
+ if (ret) {
+ pr_err("Can't request Hyper-V stimer0 IRQ %d. Error %d",
+ stimer0_irq, ret);
+ acpi_unregister_gsi(stimer0_irq);
+ stimer0_irq = -1;
+ }
+ return ret;
+ }
+
+ static void hv_remove_stimer0_irq(void)
+ {
+ if (stimer0_irq == -1) {
+ hv_remove_stimer0_handler();
+ } else {
+ free_percpu_irq(stimer0_irq, &stimer0_evt);
+ acpi_unregister_gsi(stimer0_irq);
+ stimer0_irq = -1;
+ }
+ }
+
/* hv_stimer_alloc - Global initialization of the clockevent and stimer0 */
- int hv_stimer_alloc(void)
+ int hv_stimer_alloc(bool have_percpu_irqs)
{
- int ret = 0;
+ int ret;
/*
* Synthetic timers are always available except on old versions of
direct_mode_enabled = ms_hyperv.misc_features &
HV_STIMER_DIRECT_MODE_AVAILABLE;
- if (direct_mode_enabled) {
- ret = hv_setup_stimer0_irq(&stimer0_irq, &stimer0_vector,
- hv_stimer0_isr);
+
+ /*
+ * If Direct Mode isn't enabled, the remainder of the initialization
+ * is done later by hv_stimer_legacy_init()
+ */
+ if (!direct_mode_enabled)
+ return 0;
+
+ if (have_percpu_irqs) {
+ ret = hv_setup_stimer0_irq();
if (ret)
- goto free_percpu;
+ goto free_clock_event;
+ } else {
+ hv_setup_stimer0_handler(hv_stimer0_isr);
+ }
- /*
- * Since we are in Direct Mode, stimer initialization
- * can be done now with a CPUHP value in the same range
- * as other clockevent devices.
- */
- ret = cpuhp_setup_state(CPUHP_AP_HYPERV_TIMER_STARTING,
- "clockevents/hyperv/stimer:starting",
- hv_stimer_init, hv_stimer_cleanup);
- if (ret < 0)
- goto free_stimer0_irq;
+ /*
+ * Since we are in Direct Mode, stimer initialization
+ * can be done now with a CPUHP value in the same range
+ * as other clockevent devices.
+ */
+ ret = cpuhp_setup_state(CPUHP_AP_HYPERV_TIMER_STARTING,
+ "clockevents/hyperv/stimer:starting",
+ hv_stimer_init, hv_stimer_cleanup);
+ if (ret < 0) {
+ hv_remove_stimer0_irq();
+ goto free_clock_event;
}
return ret;
- free_stimer0_irq:
- hv_remove_stimer0_irq(stimer0_irq);
- stimer0_irq = 0;
- free_percpu:
+ free_clock_event:
free_percpu(hv_clock_event);
hv_clock_event = NULL;
return ret;
}
EXPORT_SYMBOL_GPL(hv_stimer_legacy_cleanup);
-
- /* hv_stimer_free - Free global resources allocated by hv_stimer_alloc() */
- void hv_stimer_free(void)
- {
- if (!hv_clock_event)
- return;
-
- if (direct_mode_enabled) {
- cpuhp_remove_state(CPUHP_AP_HYPERV_TIMER_STARTING);
- hv_remove_stimer0_irq(stimer0_irq);
- stimer0_irq = 0;
- }
- free_percpu(hv_clock_event);
- hv_clock_event = NULL;
- }
- EXPORT_SYMBOL_GPL(hv_stimer_free);
-
/*
* Do a global cleanup of clockevents for the cases of kexec and
* vmbus exit
hv_stimer_legacy_cleanup(cpu);
}
- /*
- * If Direct Mode is enabled, the cpuhp teardown callback
- * (hv_stimer_cleanup) will be run on all CPUs to stop the
- * stimers.
- */
- hv_stimer_free();
+ if (!hv_clock_event)
+ return;
+
+ if (direct_mode_enabled) {
+ cpuhp_remove_state(CPUHP_AP_HYPERV_TIMER_STARTING);
+ hv_remove_stimer0_irq();
+ stimer0_irq = -1;
+ }
+ free_percpu(hv_clock_event);
+ hv_clock_event = NULL;
+
}
EXPORT_SYMBOL_GPL(hv_stimer_global_cleanup);
* the other that uses the TSC reference page feature as defined in the
* TLFS. The MSR version is for compatibility with old versions of
* Hyper-V and 32-bit x86. The TSC reference page version is preferred.
- *
- * The Hyper-V clocksource ratings of 250 are chosen to be below the
- * TSC clocksource rating of 300. In configurations where Hyper-V offers
- * an InvariantTSC, the TSC is not marked "unstable", so the TSC clocksource
- * is available and preferred. With the higher rating, it will be the
- * default. On older hardware and Hyper-V versions, the TSC is marked
- * "unstable", so no TSC clocksource is created and the selected Hyper-V
- * clocksource will be the default.
*/
u64 (*hv_read_reference_counter)(void);
u64 current_tick = hv_read_tsc_page(hv_get_tsc_page());
if (current_tick == U64_MAX)
- hv_get_time_ref_count(current_tick);
+ current_tick = hv_get_register(HV_REGISTER_TIME_REF_COUNT);
return current_tick;
}
u64 tsc_msr;
/* Disable the TSC page */
- hv_get_reference_tsc(tsc_msr);
+ tsc_msr = hv_get_register(HV_REGISTER_REFERENCE_TSC);
tsc_msr &= ~BIT_ULL(0);
- hv_set_reference_tsc(tsc_msr);
+ hv_set_register(HV_REGISTER_REFERENCE_TSC, tsc_msr);
}
u64 tsc_msr;
/* Re-enable the TSC page */
- hv_get_reference_tsc(tsc_msr);
+ 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_reference_tsc(tsc_msr);
+ hv_set_register(HV_REGISTER_REFERENCE_TSC, tsc_msr);
}
+ #ifdef VDSO_CLOCKMODE_HVCLOCK
static int hv_cs_enable(struct clocksource *cs)
{
- hv_enable_vdso_clocksource();
+ vclocks_set_used(VDSO_CLOCKMODE_HVCLOCK);
return 0;
}
+ #endif
static struct clocksource hyperv_cs_tsc = {
.name = "hyperv_clocksource_tsc_page",
- .rating = 250,
+ .rating = 500,
.read = read_hv_clock_tsc_cs,
.mask = CLOCKSOURCE_MASK(64),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
.suspend= suspend_hv_clock_tsc,
.resume = resume_hv_clock_tsc,
+ #ifdef VDSO_CLOCKMODE_HVCLOCK
.enable = hv_cs_enable,
+ .vdso_clock_mode = VDSO_CLOCKMODE_HVCLOCK,
+ #else
+ .vdso_clock_mode = VDSO_CLOCKMODE_NONE,
+ #endif
};
static u64 notrace read_hv_clock_msr(void)
{
- u64 current_tick;
/*
* Read the partition counter to get the current tick count. This count
* is set to 0 when the partition is created and is incremented in
* 100 nanosecond units.
*/
- hv_get_time_ref_count(current_tick);
- return current_tick;
+ return hv_get_register(HV_REGISTER_TIME_REF_COUNT);
}
static u64 notrace read_hv_clock_msr_cs(struct clocksource *arg)
static struct clocksource hyperv_cs_msr = {
.name = "hyperv_clocksource_msr",
- .rating = 250,
+ .rating = 500,
.read = read_hv_clock_msr_cs,
.mask = CLOCKSOURCE_MASK(64),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
- pv_ops.time.sched_clock = sched_clock;
+ /*
+ * Reference to pv_ops must be inline so objtool
+ * detection of noinstr violations can work correctly.
+ */
+ #ifdef CONFIG_GENERIC_SCHED_CLOCK
+ static __always_inline void hv_setup_sched_clock(void *sched_clock)
+ {
+ /*
+ * We're on an architecture with generic sched clock (not x86/x64).
+ * The Hyper-V sched clock read function returns nanoseconds, not
+ * the normal 100ns units of the Hyper-V synthetic clock.
+ */
+ sched_clock_register(sched_clock, 64, NSEC_PER_SEC);
+ }
+ #elif defined CONFIG_PARAVIRT
+ static __always_inline void hv_setup_sched_clock(void *sched_clock)
+ {
+ /* We're on x86/x64 *and* using PV ops */
++ paravirt_set_sched_clock(sched_clock);
+ }
+ #else /* !CONFIG_GENERIC_SCHED_CLOCK && !CONFIG_PARAVIRT */
+ static __always_inline void hv_setup_sched_clock(void *sched_clock) {}
+ #endif /* CONFIG_GENERIC_SCHED_CLOCK */
+
static bool __init hv_init_tsc_clocksource(void)
{
u64 tsc_msr;
if (hv_root_partition)
return false;
+ /*
+ * If Hyper-V offers TSC_INVARIANT, then the virtualized TSC correctly
+ * handles frequency and offset changes due to live migration,
+ * pause/resume, and other VM management operations. So lower the
+ * Hyper-V Reference TSC rating, causing the generic TSC to be used.
+ * TSC_INVARIANT is not offered on ARM64, so the Hyper-V Reference
+ * TSC will be preferred over the virtualized ARM64 arch counter.
+ * While the Hyper-V MSR clocksource won't be used since the
+ * Reference TSC clocksource is present, change its rating as
+ * well for consistency.
+ */
+ if (ms_hyperv.features & HV_ACCESS_TSC_INVARIANT) {
+ hyperv_cs_tsc.rating = 250;
+ hyperv_cs_msr.rating = 250;
+ }
+
hv_read_reference_counter = read_hv_clock_tsc;
phys_addr = virt_to_phys(hv_get_tsc_page());
* (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.
*/
- hv_get_reference_tsc(tsc_msr);
+ 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_reference_tsc(tsc_msr);
+ hv_set_register(HV_REGISTER_REFERENCE_TSC, tsc_msr);
- hv_set_clocksource_vdso(hyperv_cs_tsc);
clocksource_register_hz(&hyperv_cs_tsc, NSEC_PER_SEC/100);
hv_sched_clock_offset = hv_read_reference_counter();
{
/*
* Try to set up the TSC page clocksource. If it succeeds, we're
- * done. Otherwise, set up the MSR clocksoruce. At least one of
+ * done. Otherwise, set up the MSR clocksource. At least one of
* these will always be available except on very old versions of
* Hyper-V on x86. In that case we won't have a Hyper-V
* clocksource, but Linux will still run with a clocksource based
projects / linux.git / commitdiff