diff mbox series

[15/30] KVM: x86: hyper-v: Honor HV_ACCESS_REENLIGHTENMENT privilege bit

Message ID 20210419160127.192712-16-vkuznets@redhat.com (mailing list archive)
State New
Headers show
Series KVM: x86: hyper-v: Fine-grained access check to Hyper-V hypercalls and MSRs | expand

Commit Message

Vitaly Kuznetsov April 19, 2021, 4:01 p.m. UTC
HV_X64_MSR_REENLIGHTENMENT_CONTROL/HV_X64_MSR_TSC_EMULATION_CONTROL/
HV_X64_MSR_TSC_EMULATION_STATUS are only available to guest when
HV_ACCESS_REENLIGHTENMENT bit is exposed.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
 arch/x86/kvm/hyperv.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 8821981e17d3..f416c9de73cb 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -1248,6 +1248,11 @@  static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr)
 	case HV_X64_MSR_APIC_FREQUENCY:
 		return hv_vcpu->cpuid_cache.features_eax &
 			HV_ACCESS_FREQUENCY_MSRS;
+	case HV_X64_MSR_REENLIGHTENMENT_CONTROL:
+	case HV_X64_MSR_TSC_EMULATION_CONTROL:
+	case HV_X64_MSR_TSC_EMULATION_STATUS:
+		return hv_vcpu->cpuid_cache.features_eax &
+			HV_ACCESS_REENLIGHTENMENT;
 	default:
 		break;
 	}