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Both are test-only changes; there is no functional change to the kernel. Patch 1 adds negative coverage to sev_init2_tests: when the platform does not support a given SEV VM type (SEV-ES or SEV-SNP), it verifies that KVM_CREATE_VM rejects that type with -EINVAL. Previously the test only exercised the VM types that were supported, so a mismatch between KVM_CAP_VM_TYPES and the actual KVM_CREATE_VM enforcement would have gone unnoticed. Patch 2 makes sev_smoke_test capture the launch measurement returned by KVM_SEV_LAUNCH_MEASURE for SEV and SEV-ES guests and asserts that it is not all zeros, instead of discarding it. A full attestation-style validation is not possible from the selftest (userspace does not hold the transport keys used to derive the measurement), but a non-zero check catches a PSP/plumbing failure that silently leaves the buffer untouched. SEV-SNP uses a different launch flow and is skipped. Testing: built and run on an AMD EPYC 9755 (Turin) host running this tree, across two boot configurations: - SEV + SEV-ES enabled, SEV-SNP disabled - SEV + SEV-SNP enabled (SEV-ES unusable) Together these exercised both new rejection branches (SEV-ES and SEV-SNP) and the launch-measurement check for SEV/SEV-ES, plus SEV-SNP guest creation and launch. Both tests pass in every configuration, and checkpatch is clean on both patches. Hemanth Selam (2): KVM: selftests: SEV: Verify unsupported VM types are rejected at creation KVM: selftests: SEV: Sanity check the launch measurement .../selftests/kvm/x86/sev_init2_tests.c | 23 +++++++++++++-- .../selftests/kvm/x86/sev_smoke_test.c | 29 +++++++++++++++++-- 2 files changed, 47 insertions(+), 5 deletions(-) base-commit: 0e35b9b6ec0ffcc5e23cbdec09f5c622ad532b53 -- 2.43.7