[Bug 1710019] Re: support GICv3 ITS save/restore & migration

[Khaled El Mously]

This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
artful' to 'verification-done-artful'. If the problem still exists,
change the tag 'verification-needed-artful' to 'verification-failed-
artful'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-artful

-- 
You received this bug notification because you are a member of Ubuntu
OpenStack, which is subscribed to Ubuntu Cloud Archive.
https://bugs.launchpad.net/bugs/1710019

Title:
  support GICv3 ITS save/restore & migration

Status in Ubuntu Cloud Archive:
  Invalid
Status in Ubuntu Cloud Archive ocata series:
  Fix Committed
Status in Ubuntu Cloud Archive pike series:
  Fix Released
Status in linux package in Ubuntu:
  In Progress
Status in qemu package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Won't Fix
Status in qemu source package in Xenial:
  Won't Fix
Status in linux source package in Zesty:
  In Progress
Status in qemu source package in Zesty:
  Fix Committed
Status in linux source package in Artful:
  Fix Committed
Status in qemu source package in Artful:
  Fix Released

Bug description:
  [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 at grotrian:~$ sudo virsh save 7936-0 7936-0.sav

  Domain 7936-0 saved to 7936-0.sav

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

  ubuntu at 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]
  The kernel changes are restricted to ARM, minimizing the regression risk on other architectures. Other than one minor offset adjustment, all patches are clean cherry-picks from upstream. Tested on Cavium ThunderX and Qualcomm Centriq.

To manage notifications about this bug go to:
https://bugs.launchpad.net/cloud-archive/+bug/1710019/+subscriptions