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softmmu/runstate.c: add RunStateTransition support form COLO to PRELAUNCH

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If the checkpoint occurs when the guest finishes restarting
but has not started running, the runstate_set() may reject
the transition from COLO to PRELAUNCH with the crash log:

{"timestamp": {"seconds": 1593484591, "microseconds": 26605},\
"event": "RESET", "data": {"guest": true, "reason": "guest-reset"}}
qemu-system-x86_64: invalid runstate transition: 'colo' -> 'prelaunch'

Long-term testing says that it's pretty safe.

Signed-off-by: Like Xu <like.xu@linux.intel.com>
Signed-off-by: Zhang Chen <chen.zhang@intel.com>
Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Zhang Chen 2022-04-01 11:46:59 +08:00 committed by Jason Wang
parent 1576dbb5bb
commit 669846c530
1 changed files with 1 additions and 0 deletions
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softmmu/runstate.c
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@ -126,6 +126,7 @@ static const RunStateTransition runstate_transitions_def[] = {
{ RUN_STATE_RESTORE_VM, RUN_STATE_PRELAUNCH }, { RUN_STATE_RESTORE_VM, RUN_STATE_PRELAUNCH },
{ RUN_STATE_COLO, RUN_STATE_RUNNING }, { RUN_STATE_COLO, RUN_STATE_RUNNING },
{ RUN_STATE_COLO, RUN_STATE_PRELAUNCH },
{ RUN_STATE_COLO, RUN_STATE_SHUTDOWN}, { RUN_STATE_COLO, RUN_STATE_SHUTDOWN},
{ RUN_STATE_RUNNING, RUN_STATE_DEBUG }, { RUN_STATE_RUNNING, RUN_STATE_DEBUG },