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

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HV_X64_MSR_TIME_REF_COUNT is only available to guest when
HV_MSR_TIME_REF_COUNT_AVAILABLE bit is exposed.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210521095204.2161214-8-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2021-05-21 11:51:41 +02:00 • committed by Paolo Bonzini
parent b80a92ff81
commit c2b32867f2
1 changed files with 3 additions and 0 deletions
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3
arch/x86/kvm/hyperv.c
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@ -1216,6 +1216,9 @@ static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr)
case HV_X64_MSR_VP_RUNTIME: case HV_X64_MSR_VP_RUNTIME:
return hv_vcpu->cpuid_cache.features_eax & return hv_vcpu->cpuid_cache.features_eax &
HV_MSR_VP_RUNTIME_AVAILABLE; HV_MSR_VP_RUNTIME_AVAILABLE;
case HV_X64_MSR_TIME_REF_COUNT:
return hv_vcpu->cpuid_cache.features_eax &
HV_MSR_TIME_REF_COUNT_AVAILABLE;
default: default:
break; break;
} }