Comment 2 for bug 1808868

Reviewed: https://review.opendev.org/681866
Committed: https://git.openstack.org/cgit/openstack/glance/commit/?id=3a281b9bc62a1b8b0f1468bc641105a5662f8ecd
Submitter: Zuul
Branch: master

commit 3a281b9bc62a1b8b0f1468bc641105a5662f8ecd
Author: Adam Spiers <email address hidden>
Date: Thu Sep 12 12:02:50 2019 +0100

    Add SEV-related extra spec and image properties

    The AMD SEV support recently introduced to nova[0] depends on certain
    metadata properties for flavors and images which were either missing
    or only partially covered by existing glance metadata, so fill the
    missing gaps:

    - Add the hw:mem_encryption flavor extra spec and corresponding
      hw_mem_encryption image property.

    - hw_firmware_type has been supported by nova for quite a while,
      so register it as an official metadata property.

    - Add hw_cdrom_bus which was missing as per
      https://bugs.launchpad.net/glance/+bug/1808868. This shares
      values with hw_disk_bus, so document that too.

    [0] https://docs.openstack.org/nova/latest/admin/configuration/hypervisor-kvm.html#amd-sev-secure-encrypted-virtualization

    Closes-Bug: 1808868
    Change-Id: I8116565ad0326d0125b320d840d787edcb086aa9