diff options
| author | Jason J. Herne <jjherne@us.ibm.com> | 2015-03-09 15:56:08 +0100 |
|---|---|---|
| committer | Cornelia Huck <cornelia.huck@de.ibm.com> | 2015-03-16 10:15:44 +0100 |
| commit | 3f9e59bb5358cd020c5be919129281d202a24058 (patch) | |
| tree | 1ef75941c80fc50fa87f7d5791082ce9794e5cf2 /hw/s390x/s390-virtio-ccw.c | |
| parent | ae4a2bd759d647dd6146d45e4a59a01cf34d6a4d (diff) | |
s390x/kvm: Guest Migration TOD clock synchronization
Synchronizes the guest TOD clock across a migration by sending the guest TOD
clock value to the destination system. If the guest TOD clock is not preserved
across a migration then the guest's view of time will snap backwards if the
destination host clock is behind the source host clock. This will cause the
guest to hang immediately upon resuming on the destination system.
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Message-Id: <1425912968-54387-1-git-send-email-jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'hw/s390x/s390-virtio-ccw.c')
| -rw-r--r-- | hw/s390x/s390-virtio-ccw.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index dac00cec7c..eea0742b64 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -181,6 +181,10 @@ static void ccw_init(MachineState *machine) /* Create VirtIO network adapters */ s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw"); + + /* Register savevm handler for guest TOD clock */ + register_savevm(NULL, "todclock", 0, 1, + gtod_save, gtod_load, kvm_state); } static void ccw_machine_class_init(ObjectClass *oc, void *data) |