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Add a trait reflecting a compute host's capability to offer AMD's on-chip Secure Encrypted Virtualization functionality: https://en.wikipedia.org/wiki/Zen_(microarchitecture)#Enhanced_security_and_virtualization_support https://developer.amd.com/sev/ This will facilitate booting of security-sensitive VMs only on hosts which offer additional security via SEV. More details available here: https://specs.openstack.org/openstack/nova-specs/specs/stein/approved/amd-sev-libvirt-support.html Change-Id: I8ebfeac3cabbb64a7913f0b8193010a1b712382b blueprint: amd-sev-libvirt-support