This series allows ITS save/restore and migration use cases.
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
This series can be found at:
https://github.com/eauger/qemu/tree/v2.9.0-its_mig-v6
History:
v5 -> v6:
- RFC -> PATCH as the kernel associated series was pulled for 4.12
- remove linux header update patch file
- added "kvm-all: Pass an error object to kvm_device_access" to avoid
aborting if table save fails with -EFAULT
- fix the migration_blocker message (s/vGICv3/vITS)
- use &s->ctlr directly when writing GITS_CTLR
- s->iidr reset in gicv3_its_common_reset
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):
kvm-all: Pass an error object to kvm_device_access
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_gic_kvm.c | 9 ++-
hw/intc/arm_gicv3_common.c | 1 +
hw/intc/arm_gicv3_its_common.c | 12 ++-
hw/intc/arm_gicv3_its_kvm.c | 131 +++++++++++++++++++++++++++++----
hw/intc/arm_gicv3_kvm.c | 48 ++++++++++--
include/hw/intc/arm_gicv3_its_common.h | 8 ++
include/migration/vmstate.h | 2 +
include/sysemu/kvm.h | 11 ++-
kvm-all.c | 13 ++--
9 files changed, 200 insertions(+), 35 deletions(-)
--
2.5.5