[PATCH 13/30] KVM: x86: hyper-v: Honor HV_MSR_APIC_ACCESS_AVAILABLE privilege bit

[Vitaly Kuznetsov]

HV_X64_MSR_EOI, HV_X64_MSR_ICR, HV_X64_MSR_TPR, and
HV_X64_MSR_VP_ASSIST_PAGE  are only available to guest when
HV_MSR_APIC_ACCESS_AVAILABLE bit is exposed.

Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
---
 arch/x86/kvm/hyperv.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 2582c23126fa..a41ad21768ed 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -1237,6 +1237,13 @@ static bool hv_check_msr_access(struct kvm_vcpu_hv *hv_vcpu, u32 msr)
 	case HV_X64_MSR_STIMER3_COUNT:
 		return hv_vcpu->cpuid_cache.features_eax &
 			HV_MSR_SYNTIMER_AVAILABLE;
+	case HV_X64_MSR_EOI:
+	case HV_X64_MSR_ICR:
+	case HV_X64_MSR_TPR:
+	case HV_X64_MSR_VP_ASSIST_PAGE:
+		return hv_vcpu->cpuid_cache.features_eax &
+			HV_MSR_APIC_ACCESS_AVAILABLE;
+		break;
 	default:
 		break;
 	}
-- 
2.30.2