Comment 0 for bug 1710019

[Impact]
Virtual machines on GICv3-based ARM systems cannot be saved/restored or migrated.
This feature was added in QEMU 2.10.

[Test Case]
ubuntu@grotrian:~$ sudo virsh save 7936-0 7936-0.sav

Domain 7936-0 saved to 7936-0.sav

ubuntu@grotrian:~$ sudo virsh restore 7396-0.sav
error: Failed to restore domain from 7396-0.sav
error: operation failed: job: unexpectedly failed

ubuntu@grotrian:~$ sudo tail -3 /var/log/libvirt/qemu/7936-0.log
2017-08-10T21:26:38.217427Z qemu-system-aarch64: State blocked by non-migratable device 'arm_gicv3_its'
2017-08-10T21:26:38.217565Z qemu-system-aarch64: load of migration failed: Invalid argument
2017-08-10 21:26:38.217+0000: shutting down, reason=failed

[Regression Risk]