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| author | Like Xu <likexu@tencent.com> | 2022-06-01 11:19:24 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-06-08 13:06:17 -0400 |
| commit | 6ef25aa0a961298278301ae1d88106c701eb73fa (patch) | |
| tree | bd57de8db47e08927d016a4153d9f707a09dfe76 /tools/perf/scripts/python/bin | |
| parent | b9181c8ef35636152facc72f801f27b4264df8c0 (diff) | |
| download | kernel-6ef25aa0a961298278301ae1d88106c701eb73fa.tar.gz | |
KVM: x86/pmu: Restrict advanced features based on module enable_pmu
Once vPMU is disabled, the KVM would not expose features like:
PEBS (via clear kvm_pmu_cap.pebs_ept), legacy LBR and ARCH_LBR,
CPUID 0xA leaf, PDCM bit and MSR_IA32_PERF_CAPABILITIES, plus
PT_MODE_HOST_GUEST mode.
What this group of features has in common is that their use
relies on the underlying PMU counter and the host perf_event as a
back-end resource requester or sharing part of the irq delivery path.
Signed-off-by: Like Xu <likexu@tencent.com>
Message-Id: <20220601031925.59693-2-likexu@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/bin')
0 files changed, 0 insertions, 0 deletions