KVM: VMX: Use vcpu_get_perf_capabilities() to get guest-visible value

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Use vcpu_get_perf_capabilities() when querying MSR_IA32_PERF_CAPABILITIES
from the guest's perspective, e.g. to update the vPMU and to determine
which MSRs exist.  If userspace ignores MSR_IA32_PERF_CAPABILITIES but
clear X86_FEATURE_PDCM, the guest should see '0'.

Fixes: 902caeb684 ("KVM: x86/pmu: Add PEBS_DATA_CFG MSR emulation to support adaptive PEBS")
Fixes: c59a1f106f ("KVM: x86/pmu: Add IA32_PEBS_ENABLE MSR emulation for extended PEBS")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220611005755.753273-6-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2022-06-11 00:57:53 +00:00 • committed by Paolo Bonzini

parent 545feb96c0

commit 3f7999b988

1 changed files with 7 additions and 4 deletions

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arch/x86/kvm/vmx/pmu_intel.c

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