KVM: x86/pmu: Snapshot host (i.e. perf's) reported PMU capabilities

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Take a snapshot of the unadulterated PMU capabilities provided by perf so
that KVM can compare guest vPMU capabilities against hardware capabilities
when determining whether or not to intercept PMU MSRs (and RDPMC).

Reviewed-by: Sandipan Das <sandipan.das@amd.com>
Tested-by: Xudong Hao <xudong.hao@intel.com>
Link: https://lore.kernel.org/r/20250806195706.1650976-18-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Sean Christopherson 2025-08-06 12:56:39 -07:00

parent e3d1f2826d

commit 51f34b1e65

1 changed files with 10 additions and 5 deletions

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arch/x86/kvm/pmu.c

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