KVM: selftests: Test Intel PMU architectural events on fixed counters

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Extend the PMU counters test to validate architectural events using fixed
counters.  The core logic is largely the same, the biggest difference
being that if a fixed counter exists, its associated event is available
(the SDM doesn't explicitly state this to be true, but it's KVM's ABI and
letting software program a fixed counter that doesn't actually count would
be quite bizarre).

Note, fixed counters rely on PERF_GLOBAL_CTRL.

Reviewed-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Co-developed-by: Like Xu <likexu@tencent.com>
Signed-off-by: Like Xu <likexu@tencent.com>
Signed-off-by: Jinrong Liang <cloudliang@tencent.com>
Co-developed-by: Sean Christopherson <seanjc@google.com>
Tested-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Link: https://lore.kernel.org/r/20240109230250.424295-18-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Jinrong Liang 2024-01-09 15:02:37 -08:00 • committed by Sean Christopherson

parent 4f1bd6b160

commit 3e26b825f8

1 changed files with 45 additions and 9 deletions

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tools/testing/selftests/kvm/x86_64/pmu_counters_test.c

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