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| author | Like Xu <likexu@tencent.com> | 2022-06-01 11:19:23 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-06-08 13:06:18 -0400 |
| commit | 8e6a58e28b34e8d247e772159b8fa8f6bae39192 (patch) | |
| tree | 3427924d1cacabb890b52856a03b58349ffdad03 /arch/x86/kvm/pmu.c | |
| parent | 6ef25aa0a961298278301ae1d88106c701eb73fa (diff) | |
| download | linux-8e6a58e28b34e8d247e772159b8fa8f6bae39192.tar.gz | |
KVM: x86/pmu: Accept 0 for absent PMU MSRs when host-initiated if !enable_pmu
Whenever an MSR is part of KVM_GET_MSR_INDEX_LIST, as is the case for
MSR_K7_EVNTSEL0 or MSR_F15H_PERF_CTL0, it has to be always retrievable
and settable with KVM_GET_MSR and KVM_SET_MSR.
Accept a zero value for these MSRs to obey the contract.
Signed-off-by: Like Xu <likexu@tencent.com>
Message-Id: <20220601031925.59693-1-likexu@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/pmu.c')
| -rw-r--r-- | arch/x86/kvm/pmu.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c index 87483e503c46..6a32092460d3 100644 --- a/arch/x86/kvm/pmu.c +++ b/arch/x86/kvm/pmu.c @@ -442,11 +442,19 @@ static void kvm_pmu_mark_pmc_in_use(struct kvm_vcpu *vcpu, u32 msr) int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) { + if (msr_info->host_initiated && !vcpu->kvm->arch.enable_pmu) { + msr_info->data = 0; + return 0; + } + return static_call(kvm_x86_pmu_get_msr)(vcpu, msr_info); } int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) { + if (msr_info->host_initiated && !vcpu->kvm->arch.enable_pmu) + return !!msr_info->data; + kvm_pmu_mark_pmc_in_use(vcpu, msr_info->index); return static_call(kvm_x86_pmu_set_msr)(vcpu, msr_info); } |