]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commitdiff
KVM: x86: Drop guest CPUID check for host initiated writes to MSR_IA32_PERF_CAPABILITIES
authorVitaly Kuznetsov <vkuznets@redhat.com>
Thu, 16 Dec 2021 16:52:13 +0000 (17:52 +0100)
committerPaolo Bonzini <pbonzini@redhat.com>
Sun, 19 Dec 2021 18:35:18 +0000 (19:35 +0100)
The ability to write to MSR_IA32_PERF_CAPABILITIES from the host should
not depend on guest visible CPUID entries, even if just to allow
creating/restoring guest MSRs and CPUIDs in any sequence.

Fixes: 27461da31089 ("KVM: x86/pmu: Support full width counting")
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20211216165213.338923-3-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/x86.c

index 0cf1082455dfde8ad97c719edd0b9e089f85dea4..9a2972fdae82b92356543bcaa26f387d03378912 100644 (file)
@@ -3413,7 +3413,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 
                if (!msr_info->host_initiated)
                        return 1;
-               if (guest_cpuid_has(vcpu, X86_FEATURE_PDCM) && kvm_get_msr_feature(&msr_ent))
+               if (kvm_get_msr_feature(&msr_ent))
                        return 1;
                if (data & ~msr_ent.data)
                        return 1;