kvm: selftests: add cr4_cpuid_sync_test

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KVM is supposed to update some guest VM's CPUID bits (e.g. OSXSAVE) when
CR4 is changed. A bug was found in KVM recently and it was fixed by
Commit c4d2188206 ("KVM: x86: Update cpuid properly when CR4.OSXAVE or
CR4.PKE is changed"). This patch adds a test to verify the synchronization
between guest VM's CR4 and CPUID bits.

Signed-off-by: Wei Huang <wei@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Wei Huang 2018-06-25 23:41:57 -04:00 • committed by Paolo Bonzini

parent d2ce98ca0a

commit ca35906688

3 changed files with 131 additions and 0 deletions

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tools/testing/selftests/kvm/.gitignore vendored

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1

tools/testing/selftests/kvm/Makefile

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129

tools/testing/selftests/kvm/cr4_cpuid_sync_test.c

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