KVM: selftests: Introduce rdmsr_from_l2() and use it for MSR-Bitmap tests

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Hyper-V MSR-Bitmap tests do RDMSR from L2 to exit to L1. While 'evmcs_test'
correctly clobbers all GPRs (which are not preserved), 'hyperv_svm_test'
does not. Introduce a more generic rdmsr_from_l2() to avoid code
duplication and remove hardcoding of MSRs.  Do not put it in common code
because it is really just a selftests bug rather than a processor
feature that requires it.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20221101145426.251680-46-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Vitaly Kuznetsov 2022-11-01 15:54:23 +01:00 • committed by Paolo Bonzini

parent 8fda37cf3d

commit 75ee7505fe

2 changed files with 23 additions and 21 deletions

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27

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

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17

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

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