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

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HV_X64_MSR_TSC_FREQUENCY/HV_X64_MSR_APIC_FREQUENCY are only available to
guest when HV_ACCESS_FREQUENCY_MSRS bit is exposed.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210521095204.2161214-15-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2021-05-21 11:51:48 +02:00 committed by Paolo Bonzini
parent 978b57475c
commit 9442f3bd90
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kvm/hyperv.c
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@ -1253,6 +1253,10 @@ static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr)
return hv_vcpu->cpuid_cache.features_eax &
HV_MSR_APIC_ACCESS_AVAILABLE;
break;
case HV_X64_MSR_TSC_FREQUENCY:
case HV_X64_MSR_APIC_FREQUENCY:
return hv_vcpu->cpuid_cache.features_eax &
HV_ACCESS_FREQUENCY_MSRS;
default:
break;
}