Verify that KVM's supported XCR0 includes AVX (and earlier features) when
running the SEV-ES VMSA XSAVE test. In practice, the issue will likely
never pop up, since KVM support for AVX predates KVM support for SEV-ES,
but checking for KVM support makes the requirement more obvious.
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
tools/testing/selftests/kvm/x86_64/sev_smoke_test.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c
index 965fc362dee3..ae77698e6e97 100644
--- a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c
+++ b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c
@@ -181,6 +181,8 @@ static void test_sev_es_shutdown(void)
int main(int argc, char *argv[])
{
+ const u64 xf_mask = XFEATURE_MASK_X87_AVX;
+
TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_SEV));
test_sev(guest_sev_code, SEV_POLICY_NO_DBG);
@@ -193,7 +195,7 @@ int main(int argc, char *argv[])
test_sev_es_shutdown();
if (kvm_has_cap(KVM_CAP_XCRS) &&
- (xgetbv(0) & XFEATURE_MASK_X87_AVX) == XFEATURE_MASK_X87_AVX) {
+ (xgetbv(0) & kvm_cpu_supported_xcr0() & xf_mask) == xf_mask) {
test_sync_vmsa(0);
test_sync_vmsa(SEV_POLICY_NO_DBG);
}
--
2.47.0.rc0.187.ge670bccf7e-goog
