KVM: selftests: aarch64: Introduce vpmu_counter_access test

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Introduce vpmu_counter_access test for arm64 platforms.
The test configures PMUv3 for a vCPU, sets PMCR_EL0.N for the vCPU,
and check if the guest can consistently see the same number of the
PMU event counters (PMCR_EL0.N) that userspace sets.
This test case is done with each of the PMCR_EL0.N values from
0 to 31 (With the PMCR_EL0.N values greater than the host value,
the test expects KVM_SET_ONE_REG for the PMCR_EL0 to fail).

Signed-off-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20231020214053.2144305-10-rananta@google.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

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Reiji Watanabe 2023-10-20 21:40:49 +00:00 • committed by Oliver Upton

parent 9f4b3273df

commit 8d0aebe1ca

2 changed files with 256 additions and 0 deletions

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tools/testing/selftests/kvm/Makefile

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255

tools/testing/selftests/kvm/aarch64/vpmu_counter_access.c

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