KVM: selftests: Add MONITOR/MWAIT quirk test

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Add a test to verify the "MONITOR/MWAIT never fault" quirk, and as a
bonus, also verify the related "MISC_ENABLES ignores ENABLE_MWAIT" quirk.

If the "never fault" quirk is enabled, MONITOR/MWAIT should always be
emulated as NOPs, even if they're reported as disabled in guest CPUID.
Use the MISC_ENABLES quirk to coerce KVM into toggling the MWAIT CPUID
enable, as KVM now disallows manually toggling CPUID bits after running
the vCPU.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220608224516.3788274-6-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2022-06-08 22:45:16 +00:00 • committed by Paolo Bonzini

parent cc5851c6be

commit 2325d4dd73

4 changed files with 139 additions and 0 deletions

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tools/testing/selftests/kvm/.gitignore vendored

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tools/testing/selftests/kvm/Makefile

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tools/testing/selftests/kvm/x86_64/monitor_mwait_test

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

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