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| author | Like Xu <likexu@tencent.com> | 2022-04-11 18:19:37 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-06-08 04:47:58 -0400 |
| commit | 79f3e3b58386a2fc05054367b905619f741beeb4 (patch) | |
| tree | d61f62c558c02a4606ce99b7033aaf9209164bef /tools/perf/scripts/python | |
| parent | c59a1f106f5cd4843c097069ff1bb2ad72103a67 (diff) | |
| download | kernel-79f3e3b58386a2fc05054367b905619f741beeb4.tar.gz | |
KVM: x86/pmu: Reprogram PEBS event to emulate guest PEBS counter
When a guest counter is configured as a PEBS counter through
IA32_PEBS_ENABLE, a guest PEBS event will be reprogrammed by
configuring a non-zero precision level in the perf_event_attr.
The guest PEBS overflow PMI bit would be set in the guest
GLOBAL_STATUS MSR when PEBS facility generates a PEBS
overflow PMI based on guest IA32_DS_AREA MSR.
Even with the same counter index and the same event code and
mask, guest PEBS events will not be reused for non-PEBS events.
Originally-by: Andi Kleen <ak@linux.intel.com>
Co-developed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Like Xu <likexu@tencent.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Message-Id: <20220411101946.20262-9-likexu@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions