From: Vadim Rozenfeld <vrozenfe@xxxxxxxxxx> http://msdn.microsoft.com/en-us/library/windows/hardware/ff541625%28v=vs.85%29.aspx This code is generic for activating reference time counter or virtual reference time stamp counter Signed-off-by: Vadim Rozenfeld <vrozenfe@xxxxxxxxxx> Reviewed-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> --- linux-headers/asm-x86/hyperv.h | 3 +++ linux-headers/linux/kvm.h | 1 + target-i386/cpu-qom.h | 1 + target-i386/cpu.c | 1 + target-i386/cpu.h | 1 + target-i386/kvm.c | 20 +++++++++++++++++++- target-i386/machine.c | 22 ++++++++++++++++++++++ 7 files changed, 48 insertions(+), 1 deletion(-) diff --git a/linux-headers/asm-x86/hyperv.h b/linux-headers/asm-x86/hyperv.h index b8f1c01..3b400ee 100644 --- a/linux-headers/asm-x86/hyperv.h +++ b/linux-headers/asm-x86/hyperv.h @@ -149,6 +149,9 @@ /* MSR used to read the per-partition time reference counter */ #define HV_X64_MSR_TIME_REF_COUNT 0x40000020 +/* A partition's reference time stamp counter (TSC) page */ +#define HV_X64_MSR_REFERENCE_TSC 0x40000021 + /* MSR used to retrieve the TSC frequency */ #define HV_X64_MSR_TSC_FREQUENCY 0x40000022 diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h index 5a49671..999fb13 100644 --- a/linux-headers/linux/kvm.h +++ b/linux-headers/linux/kvm.h @@ -674,6 +674,7 @@ struct kvm_ppc_smmu_info { #define KVM_CAP_ARM_EL1_32BIT 93 #define KVM_CAP_SPAPR_MULTITCE 94 #define KVM_CAP_EXT_EMUL_CPUID 95 +#define KVM_CAP_HYPERV_TIME 96 #ifdef KVM_CAP_IRQ_ROUTING diff --git a/target-i386/cpu-qom.h b/target-i386/cpu-qom.h index d1751a4..722f11a 100644 --- a/target-i386/cpu-qom.h +++ b/target-i386/cpu-qom.h @@ -69,6 +69,7 @@ typedef struct X86CPU { bool hyperv_vapic; bool hyperv_relaxed_timing; int hyperv_spinlock_attempts; + bool hyperv_time; bool check_cpuid; bool enforce_cpuid; diff --git a/target-i386/cpu.c b/target-i386/cpu.c index 2e0be01..1f30efd 100644 --- a/target-i386/cpu.c +++ b/target-i386/cpu.c @@ -2702,6 +2702,7 @@ static Property x86_cpu_properties[] = { { .name = "hv-spinlocks", .info = &qdev_prop_spinlocks }, DEFINE_PROP_BOOL("hv-relaxed", X86CPU, hyperv_relaxed_timing, false), DEFINE_PROP_BOOL("hv-vapic", X86CPU, hyperv_vapic, false), + DEFINE_PROP_BOOL("hv-time", X86CPU, hyperv_time, false), DEFINE_PROP_BOOL("check", X86CPU, check_cpuid, false), DEFINE_PROP_BOOL("enforce", X86CPU, enforce_cpuid, false), DEFINE_PROP_END_OF_LIST() diff --git a/target-i386/cpu.h b/target-i386/cpu.h index 45bd554..1b94f0f 100644 --- a/target-i386/cpu.h +++ b/target-i386/cpu.h @@ -865,6 +865,7 @@ typedef struct CPUX86State { uint64_t msr_hv_hypercall; uint64_t msr_hv_guest_os_id; uint64_t msr_hv_vapic; + uint64_t msr_hv_tsc; /* exception/interrupt handling */ int error_code; diff --git a/target-i386/kvm.c b/target-i386/kvm.c index ddd437f..e555040 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -74,6 +74,7 @@ static bool has_msr_kvm_steal_time; static int lm_capable_kernel; static bool has_msr_hv_hypercall; static bool has_msr_hv_vapic; +static bool has_msr_hv_tsc; static bool has_msr_architectural_pmu; static uint32_t num_architectural_pmu_counters; @@ -442,6 +443,7 @@ static bool hyperv_enabled(X86CPU *cpu) CPUState *cs = CPU(cpu); return kvm_check_extension(cs->kvm_state, KVM_CAP_HYPERV) > 0 && (hyperv_hypercall_available(cpu) || + cpu->hyperv_time || cpu->hyperv_relaxed_timing); } @@ -499,7 +501,13 @@ int kvm_arch_init_vcpu(CPUState *cs) c->eax |= HV_X64_MSR_APIC_ACCESS_AVAILABLE; has_msr_hv_vapic = true; } - + if (cpu->hyperv_time && + kvm_check_extension(cs->kvm_state, KVM_CAP_HYPERV_TIME) > 0) { + c->eax |= HV_X64_MSR_HYPERCALL_AVAILABLE; + c->eax |= HV_X64_MSR_TIME_REF_COUNT_AVAILABLE; + c->eax |= 0x200; + has_msr_hv_tsc = true; + } c = &cpuid_data.entries[cpuid_i++]; c->function = HYPERV_CPUID_ENLIGHTMENT_INFO; if (cpu->hyperv_relaxed_timing) { @@ -1239,6 +1247,10 @@ static int kvm_put_msrs(X86CPU *cpu, int level) kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_APIC_ASSIST_PAGE, env->msr_hv_vapic); } + if (has_msr_hv_tsc) { + kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_REFERENCE_TSC, + env->msr_hv_tsc); + } /* Note: MSR_IA32_FEATURE_CONTROL is written separately, see * kvm_put_msr_feature_control. */ @@ -1530,6 +1542,9 @@ static int kvm_get_msrs(X86CPU *cpu) if (has_msr_hv_vapic) { msrs[n++].index = HV_X64_MSR_APIC_ASSIST_PAGE; } + if (has_msr_hv_tsc) { + msrs[n++].index = HV_X64_MSR_REFERENCE_TSC; + } msr_data.info.nmsrs = n; ret = kvm_vcpu_ioctl(CPU(cpu), KVM_GET_MSRS, &msr_data); @@ -1647,6 +1662,9 @@ static int kvm_get_msrs(X86CPU *cpu) case HV_X64_MSR_APIC_ASSIST_PAGE: env->msr_hv_vapic = msrs[i].data; break; + case HV_X64_MSR_REFERENCE_TSC: + env->msr_hv_tsc = msrs[i].data; + break; } } diff --git a/target-i386/machine.c b/target-i386/machine.c index e72e270..d548c05 100644 --- a/target-i386/machine.c +++ b/target-i386/machine.c @@ -593,6 +593,25 @@ static const VMStateDescription vmstate_msr_hyperv_vapic = { } }; +static bool hyperv_time_enable_needed(void *opaque) +{ + X86CPU *cpu = opaque; + CPUX86State *env = &cpu->env; + + return env->msr_hv_tsc != 0; +} + +static const VMStateDescription vmstate_msr_hyperv_time = { + .name = "cpu/msr_hyperv_time", + .version_id = 1, + .minimum_version_id = 1, + .minimum_version_id_old = 1, + .fields = (VMStateField []) { + VMSTATE_UINT64(env.msr_hv_tsc, X86CPU), + VMSTATE_END_OF_LIST() + } +}; + const VMStateDescription vmstate_x86_cpu = { .name = "cpu", .version_id = 12, @@ -733,6 +752,9 @@ const VMStateDescription vmstate_x86_cpu = { }, { .vmsd = &vmstate_msr_hyperv_vapic, .needed = hyperv_vapic_enable_needed, + }, { + .vmsd = &vmstate_msr_hyperv_time, + .needed = hyperv_time_enable_needed, } , { /* empty */ } -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
