[PATCH 10/30] KVM: x86: hyper-v: Honor HV_MSR_REFERENCE_TSC_AVAILABLE privilege bit

[Vitaly Kuznetsov]

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@xxxxxxxxxx>
---
 arch/x86/kvm/hyperv.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index affc6e0cda09..be6156a27bd7 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -1216,6 +1216,9 @@ 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;
 	}
-- 
2.30.2