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KVM: x86: hyper-v: Honor HV_MSR_REFERENCE_TSC_AVAILABLE privilege bit

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HV_X64_MSR_REFERENCE_TSC is only available to guest when
HV_MSR_REFERENCE_TSC_AVAILABLE bit is exposed.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210521095204.2161214-11-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2021-05-21 11:51:44 +02:00 • committed by Paolo Bonzini
parent 679008e4bb
commit a1ec661c3f
1 changed files with 3 additions and 0 deletions
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3
arch/x86/kvm/hyperv.c
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@ -1225,6 +1225,9 @@ static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr)
case HV_X64_MSR_RESET:
return hv_vcpu->cpuid_cache.features_eax &
HV_MSR_RESET_AVAILABLE;
case HV_X64_MSR_REFERENCE_TSC:
return hv_vcpu->cpuid_cache.features_eax &
HV_MSR_REFERENCE_TSC_AVAILABLE;
default:
break;
}