From: Vitaly Kuznetsov Date: Fri, 21 May 2021 09:51:49 +0000 (+0200) Subject: KVM: x86: hyper-v: Honor HV_ACCESS_REENLIGHTENMENT privilege bit X-Git-Tag: v5.14-rc1~166^2~160 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=234d01baec5b216b60b560672957470f773ecf78;p=thirdparty%2Fkernel%2Flinux.git KVM: x86: hyper-v: Honor HV_ACCESS_REENLIGHTENMENT privilege bit 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 Signed-off-by: Paolo Bonzini Message-Id: <20210521095204.2161214-16-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini --- diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 2a0660b4e779d..230f52606e396 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -1257,6 +1257,11 @@ 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; }