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| /linux/tools/testing/selftests/kvm/x86_64/ |
| H A D | pmu_counters_test.c | diff 7137cf751b9b14662adad61e35c236e141430aed Wed Jan 10 00:02:38 CET 2024 Jinrong Liang <cloudliang@tencent.com> KVM: selftests: Test consistency of CPUID with num of gp counters
Add a test to verify that KVM correctly emulates MSR-based accesses to
general purpose counters based on guest CPUID, e.g. that accesses to
non-existent counters #GP and accesses to existent counters succeed.
Note, for compatibility reasons, KVM does not emulate #GP when
MSR_P6_PERFCTR[0|1] is not present (writes should be dropped).
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/20240109230250.424295-19-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
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