@@ -1330,13 +1330,22 @@ static int kvm_hv_set_msr_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data,
}
break;
case HV_X64_MSR_REENLIGHTENMENT_CONTROL:
+ if (unlikely(!host && !(hv_vcpu->cpuid_cache.features_eax &
+ HV_ACCESS_REENLIGHTENMENT)))
+ return 1;
+
hv->hv_reenlightenment_control = data;
break;
case HV_X64_MSR_TSC_EMULATION_CONTROL:
+ if (unlikely(!host && !(hv_vcpu->cpuid_cache.features_eax &
+ HV_ACCESS_REENLIGHTENMENT)))
+ return 1;
+
hv->hv_tsc_emulation_control = data;
break;
case HV_X64_MSR_TSC_EMULATION_STATUS:
- if (data && !host)
+ if (unlikely(!host && (!(hv_vcpu->cpuid_cache.features_eax &
+ HV_ACCESS_REENLIGHTENMENT) || data)))
return 1;
hv->hv_tsc_emulation_status = data;
@@ -1545,12 +1554,24 @@ static int kvm_hv_get_msr_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata,
data = 0;
break;
case HV_X64_MSR_REENLIGHTENMENT_CONTROL:
+ if (unlikely(!host && !(hv_vcpu->cpuid_cache.features_eax &
+ HV_ACCESS_REENLIGHTENMENT)))
+ return 1;
+
data = hv->hv_reenlightenment_control;
break;
case HV_X64_MSR_TSC_EMULATION_CONTROL:
+ if (unlikely(!host && !(hv_vcpu->cpuid_cache.features_eax &
+ HV_ACCESS_REENLIGHTENMENT)))
+ return 1;
+
data = hv->hv_tsc_emulation_control;
break;
case HV_X64_MSR_TSC_EMULATION_STATUS:
+ if (unlikely(!host && !(hv_vcpu->cpuid_cache.features_eax &
+ HV_ACCESS_REENLIGHTENMENT)))
+ return 1;
+
data = hv->hv_tsc_emulation_status;
break;
case HV_X64_MSR_SYNDBG_OPTIONS:
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 | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-)