KVM: selftests: Add svm_pmu_host_guest_test for Host-Only/Guest-Only bits

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Add a selftest to verify KVM correctly virtualizes the AMD PMU Host-Only
(bit 41) and Guest-Only (bit 40) event selector bits across all relevant
SVM state transitions.

The test programs 4 PMCs simultaneously with all combinations of the
Host-Only and Guest-Only bits, then verifies correct counting behavior
with EFER.SVME clear and set, as well as in host mode and guest mode.
The test also verifies that updating Host-Only / Guest-Only bits for a
PMC works as intended, and that event filtering is still respected.

Signed-off-by: Jim Mattson <jmattson@google.com>
Co-developed-by: Yosry Ahmed <yosry@kernel.org>
Signed-off-by: Yosry Ahmed <yosry@kernel.org>
Link: https://patch.msgid.link/20260610003030.2957261-6-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Jim Mattson 2026-06-09 17:30:30 -07:00 • committed by Sean Christopherson

parent 0c277410f5

commit 70f4701c12

3 changed files with 222 additions and 0 deletions

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1

tools/testing/selftests/kvm/Makefile.kvm

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6

tools/testing/selftests/kvm/include/x86/pmu.h

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215

tools/testing/selftests/kvm/x86/svm_pmu_host_guest_test.c

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