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5821ebf9 HZ |
1 | /* |
2 | * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO) | |
3 | * (a.k.a. Fault Tolerance or Continuous Replication) | |
4 | * | |
5 | * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD. | |
6 | * Copyright (c) 2016 FUJITSU LIMITED | |
7 | * Copyright (c) 2016 Intel Corporation | |
8 | * | |
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. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include "qemu/osdep.h" | |
15 | #include <migration/colo.h> | |
16 | #include "trace.h" | |
17 | ||
18 | typedef struct { | |
19 | bool colo_requested; | |
20 | } COLOInfo; | |
21 | ||
22 | static COLOInfo colo_info; | |
23 | ||
24 | static void colo_info_pre_save(void *opaque) | |
25 | { | |
26 | COLOInfo *s = opaque; | |
27 | ||
28 | s->colo_requested = migrate_colo_enabled(); | |
29 | } | |
30 | ||
31 | static bool colo_info_need(void *opaque) | |
32 | { | |
33 | return migrate_colo_enabled(); | |
34 | } | |
35 | ||
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() | |
45 | }, | |
46 | }; | |
47 | ||
48 | void colo_info_init(void) | |
49 | { | |
50 | vmstate_register(NULL, 0, &colo_state, &colo_info); | |
51 | } |