boot, the measurement can be verified by comparing it to what the guest owner
expects.
+If len is zero on entry, the measurement blob length is written to len and
+uaddr is unused.
+
Parameters (in): struct kvm_sev_launch_measure
Returns: 0 on success, -negative on error
commands and signed with the PEK. The digest returned by the command should match the digest
used by the guest owner with the KVM_SEV_LAUNCH_MEASURE.
+If len is zero on entry, the measurement blob length is written to len and
+uaddr is unused.
+
Parameters (in): struct kvm_sev_attestation
Returns: 0 on success, -negative on error