[Qemu-devel] [RFC v5 0/4] vITS save/restore

[Eric Auger <eric.auger@redhat.com>]

This series allows ITS save/restore and migration use cases.
It relies on not upstreamed kernel series [1].

ITS tables are flushed into guest RAM on VM stop while registers
are save on pre_save() callback. Tables and registers are restored
on ITS post_load().

Redistributor pending tables also are flushed on VM stop, independently
on ITS tables.

That work was tested on Cavium ThunderX using virsh save/restore and
virt-manager live migration.

Best Regards

Eric

Host Kernel dependencies:
- [1] [PATCH v5 00/22] vITS save/restore

History:
v4 -> v5:
- adapt to the new user API
- new patch "hw/intc/arm_gicv3_kvm: Implement pending table save"
  as the pending table save now is handled on GICV3 side.

v3 -> v4:
- oversight in v3, missed a last minute correction related to
  reg useless declaration in kvm_arm_its_pre_save

v2 -> v3:
- GITS_IIDR is now saved and restored to check ABI revision.
- get/put functions renamed into pre_save/post_load
- unmigratable = false removed
- changed the migration blocker message
- remove the extract64 round s->ctlr
- reword some comments

v1 -> v2:
- rebase on 2.9 soft release code
- handle case where migrate_add_blocker fails
- add comments along with ITS and GICv3 migration priorities


Eric Auger (4):
  linux-headers: Update for vITS save/restore
  hw/intc/arm_gicv3_its: Implement state save/restore
  hw/intc/arm_gicv3_kvm: Implement pending table save
  hw/intc/arm_gicv3_its: Allow save/restore

 hw/intc/arm_gicv3_common.c             |   1 +
 hw/intc/arm_gicv3_its_common.c         |  11 ++-
 hw/intc/arm_gicv3_its_kvm.c            | 120 +++++++++++++++++++++++++++++----
 hw/intc/arm_gicv3_kvm.c                |  25 +++++++
 include/hw/intc/arm_gicv3_its_common.h |   8 +++
 include/migration/vmstate.h            |   2 +
 linux-headers/asm-arm/kvm.h            |   6 +-
 linux-headers/asm-arm64/kvm.h          |   6 +-
 8 files changed, 164 insertions(+), 15 deletions(-)

-- 
2.5.5