Comment 0 for bug 1756118

On AArch64 we use cpu_mode='host-passthrought' which should allow us to do live migration between compute nodes running same cpus.

But it does not:

------------------------------------------------------------------------------------------------------estuary@ref-compute-2:~$ openstack server migrate --live ref-compute-1 --wait 38da6986-2f76-486d-877b-438560d7aa05
Migration pre-check error: CPU doesn't have compatibility.

XML error: Missing CPU model name

Refer to http://libvirt.org/html/libvirt-libvirt-host.html#virCPUCompareResult (HTTP 400) (Request-ID: req-cea6f860-e78b-469b-9527-a703114b372b)
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virsh itself is able to live migrate between two XGene1 nodes:

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root@cb-r1-m1-c1n1:/var/log/libvirt# virsh migrate --copy-storage-all --live debian-cloud-image qemu+ssh://root@10.101.3.103/system tcp://10.101.3.103

2018-03-15 15:15:23.217+0000: initiating migration
2018-03-15 15:15:25.740+0000: shutting down, reason=migrated
2018-03-15T15:15:25.741113Z qemu-system-aarch64: terminating on signal 15 from pid 573 (/usr/sbin/libvirtd)

root@debian:/var/lib/libvirt/images# virsh list --all
 Id Name State
----------------------------------------------------
 9 debian-cloud-image running
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Will dig more to find out what, where and why is wrong.

More info: https://bugzilla.redhat.com/show_bug.cgi?id=1430987