KVM: selftests: Extend PMU counters test to validate RDPMC after WRMSR

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Extend the read/write PMU counters subtest to verify that RDPMC also reads
back the written value.  Opportunsitically verify that attempting to use
the "fast" mode of RDPMC fails, as the "fast" flag is only supported by
non-architectural PMUs, which KVM doesn't virtualize.

Tested-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Link: https://lore.kernel.org/r/20240109230250.424295-30-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Sean Christopherson 2024-01-09 15:02:49 -08:00

parent b5e66df34c

commit a8a37f5556

1 changed files with 41 additions and 0 deletions

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

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