diff mbox series

[09/30] KVM: x86: hyper-v: Honor HV_MSR_RESET_AVAILABLE privilege bit

Message ID 20210419160127.192712-10-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_RESET is only available to guest when HV_MSR_RESET_AVAILABLE bit
is exposed.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
 arch/x86/kvm/hyperv.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 0f3f30f6ca69..affc6e0cda09 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -1213,6 +1213,9 @@  static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr)
 	case HV_X64_MSR_VP_INDEX:
 		return hv_vcpu->cpuid_cache.features_eax &
 			HV_MSR_VP_INDEX_AVAILABLE;
+	case HV_X64_MSR_RESET:
+		return hv_vcpu->cpuid_cache.features_eax &
+			HV_MSR_RESET_AVAILABLE;
 	default:
 		break;
 	}