** Changed in: nova
     Assignee: Stephen Finucane (stephenfinucane) => Marcin Juszkiewicz (hrw)

** Changed in: nova
   Importance: Undecided => Medium

** Also affects: nova/pike
   Importance: Undecided
       Status: New

** Changed in: nova/pike
     Assignee: (unassigned) => Marcin Juszkiewicz (hrw)

** Changed in: nova/pike
       Status: New => In Progress

** Changed in: nova/pike
   Importance: Undecided => Medium

** Tags added: aarch64 libvirt

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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1741230

Title:
  libvirt: use 'host-passthrough' as default on AArch64

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) pike series:
  In Progress

Bug description:
  At Linaro we have several instances of OpenStack running. Some are
  public, some private. Some at Newton, some at Pike and now some on
  Queens.

  And always we have to set cpu_mode = 'host-passthrough' in [libvirt]
  section of nova.conf file.

  As we use Kolla to build and deploy Queens I added workaround there
  which sets cpu_mode in proper way for AArch64. But this is
  workaround...

  So I looked at code of Nova and created some quick hack:
  https://review.openstack.org/#/c/530965/

  It works for us but may not be proper way of doing it.

  We use Debian 'stretch' as host system with libvirt 3.10.0 backported
  from 'testing'.

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