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| author | Sean Christopherson <seanjc@google.com> | 2024-11-27 17:33:36 -0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2024-12-18 14:19:31 -0800 |
| commit | 01bcd829c63fdde92d9d6c32b2ed3ba34ead0930 (patch) | |
| tree | 7c3f97623440027520796a8673dff24bbee9417e /tools/testing | |
| parent | a2a791e8208623b1575f21c7ec559df095c0a96e (diff) | |
| download | linux-01bcd829c63fdde92d9d6c32b2ed3ba34ead0930.tar.gz linux-01bcd829c63fdde92d9d6c32b2ed3ba34ead0930.zip | |
KVM: selftests: Verify KVM stuffs runtime CPUID OS bits on CR4 writes
Extend x86's set sregs test to verify that KVM sets/clears OSXSAVE and
OSKPKE according to CR4.XSAVE and CR4.PKE respectively. For performance
reasons, KVM is responsible for emulating the architectural behavior of
the OS CPUID bits tracking CR4.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Link: https://lore.kernel.org/r/20241128013424.4096668-10-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'tools/testing')
| -rw-r--r-- | tools/testing/selftests/kvm/x86/set_sregs_test.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/x86/set_sregs_test.c b/tools/testing/selftests/kvm/x86/set_sregs_test.c index 96fd690d479a..f4095a3d1278 100644 --- a/tools/testing/selftests/kvm/x86/set_sregs_test.c +++ b/tools/testing/selftests/kvm/x86/set_sregs_test.c @@ -85,6 +85,16 @@ static void test_cr_bits(struct kvm_vcpu *vcpu, uint64_t cr4) rc = _vcpu_sregs_set(vcpu, &sregs); TEST_ASSERT(!rc, "Failed to set supported CR4 bits (0x%lx)", cr4); + TEST_ASSERT(!!(sregs.cr4 & X86_CR4_OSXSAVE) == + (vcpu->cpuid && vcpu_cpuid_has(vcpu, X86_FEATURE_OSXSAVE)), + "KVM didn't %s OSXSAVE in CPUID as expected", + (sregs.cr4 & X86_CR4_OSXSAVE) ? "set" : "clear"); + + TEST_ASSERT(!!(sregs.cr4 & X86_CR4_PKE) == + (vcpu->cpuid && vcpu_cpuid_has(vcpu, X86_FEATURE_OSPKE)), + "KVM didn't %s OSPKE in CPUID as expected", + (sregs.cr4 & X86_CR4_PKE) ? "set" : "clear"); + vcpu_sregs_get(vcpu, &sregs); TEST_ASSERT(sregs.cr4 == cr4, "sregs.CR4 (0x%llx) != CR4 (0x%lx)", sregs.cr4, cr4); |