COLO: Add a new RunState RUN_STATE_COLO
[qemu/ar7.git] / migration / colo-comm.c
blobbf44f764406aa8aebdd7c4535cd766be66f9457e
1 /*
2 * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
3 * (a.k.a. Fault Tolerance or Continuous Replication)
5 * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
6 * Copyright (c) 2016 FUJITSU LIMITED
7 * Copyright (c) 2016 Intel Corporation
9 * This work is licensed under the terms of the GNU GPL, version 2 or
10 * later. See the COPYING file in the top-level directory.
14 #include "qemu/osdep.h"
15 #include <migration/colo.h>
16 #include "trace.h"
18 typedef struct {
19 bool colo_requested;
20 } COLOInfo;
22 static COLOInfo colo_info;
24 static void colo_info_pre_save(void *opaque)
26 COLOInfo *s = opaque;
28 s->colo_requested = migrate_colo_enabled();
31 static bool colo_info_need(void *opaque)
33 return migrate_colo_enabled();
36 static const VMStateDescription colo_state = {
37 .name = "COLOState",
38 .version_id = 1,
39 .minimum_version_id = 1,
40 .pre_save = colo_info_pre_save,
41 .needed = colo_info_need,
42 .fields = (VMStateField[]) {
43 VMSTATE_BOOL(colo_requested, COLOInfo),
44 VMSTATE_END_OF_LIST()
48 void colo_info_init(void)
50 vmstate_register(NULL, 0, &colo_state, &colo_info);
53 bool migration_incoming_enable_colo(void)
55 return colo_info.colo_requested;
58 void migration_incoming_exit_colo(void)
60 colo_info.colo_requested = false;