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Commit | Line | Data |
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9dd986cc RJ |
1 | /* |
2 | * Virtual hardware watchdog. | |
3 | * | |
4 | * Copyright (C) 2009 Red Hat Inc. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version 2 | |
9 | * of the License, or (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
8167ee88 | 17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
9dd986cc RJ |
18 | * |
19 | * By Richard W.M. Jones (rjones@redhat.com). | |
20 | */ | |
21 | ||
0430891c | 22 | #include "qemu/osdep.h" |
1de7afc9 PB |
23 | #include "qemu/option.h" |
24 | #include "qemu/config-file.h" | |
25 | #include "qemu/queue.h" | |
e688df6b | 26 | #include "qapi/error.h" |
112ed241 | 27 | #include "qapi/qapi-commands-run-state.h" |
9af23989 | 28 | #include "qapi/qapi-events-run-state.h" |
9c17d615 | 29 | #include "sysemu/sysemu.h" |
0d09e41a | 30 | #include "sysemu/watchdog.h" |
795dc6e4 | 31 | #include "hw/nmi.h" |
f348b6d1 | 32 | #include "qemu/help_option.h" |
9dd986cc | 33 | |
4c7f4426 | 34 | static WatchdogAction watchdog_action = WATCHDOG_ACTION_RESET; |
b58deb34 | 35 | static QLIST_HEAD(, WatchdogTimerModel) watchdog_list; |
9dd986cc RJ |
36 | |
37 | void watchdog_add_model(WatchdogTimerModel *model) | |
38 | { | |
72cf2d4f | 39 | QLIST_INSERT_HEAD(&watchdog_list, model, entry); |
9dd986cc RJ |
40 | } |
41 | ||
42 | /* Returns: | |
43 | * 0 = continue | |
44 | * 1 = exit program with error | |
45 | * 2 = exit program without error | |
46 | */ | |
47 | int select_watchdog(const char *p) | |
48 | { | |
49 | WatchdogTimerModel *model; | |
09aaa160 | 50 | QemuOpts *opts; |
9dd986cc RJ |
51 | |
52 | /* -watchdog ? lists available devices and exits cleanly. */ | |
c8057f95 | 53 | if (is_help_option(p)) { |
72cf2d4f | 54 | QLIST_FOREACH(model, &watchdog_list, entry) { |
9dd986cc RJ |
55 | fprintf(stderr, "\t%s\t%s\n", |
56 | model->wdt_name, model->wdt_description); | |
57 | } | |
58 | return 2; | |
59 | } | |
60 | ||
72cf2d4f | 61 | QLIST_FOREACH(model, &watchdog_list, entry) { |
9dd986cc | 62 | if (strcasecmp(model->wdt_name, p) == 0) { |
09aaa160 | 63 | /* add the device */ |
87ea75d5 PC |
64 | opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, |
65 | &error_abort); | |
f43e47db | 66 | qemu_opt_set(opts, "driver", p, &error_abort); |
9dd986cc RJ |
67 | return 0; |
68 | } | |
69 | } | |
70 | ||
71 | fprintf(stderr, "Unknown -watchdog device. Supported devices are:\n"); | |
72cf2d4f | 72 | QLIST_FOREACH(model, &watchdog_list, entry) { |
9dd986cc RJ |
73 | fprintf(stderr, "\t%s\t%s\n", |
74 | model->wdt_name, model->wdt_description); | |
75 | } | |
76 | return 1; | |
77 | } | |
78 | ||
79 | int select_watchdog_action(const char *p) | |
80 | { | |
4c7f4426 MP |
81 | int action; |
82 | char *qapi_value; | |
9dd986cc | 83 | |
4c7f4426 MP |
84 | qapi_value = g_ascii_strdown(p, -1); |
85 | action = qapi_enum_parse(&WatchdogAction_lookup, qapi_value, -1, NULL); | |
86 | g_free(qapi_value); | |
87 | if (action < 0) | |
88 | return -1; | |
f0df84c6 | 89 | qmp_watchdog_set_action(action, &error_abort); |
9dd986cc RJ |
90 | return 0; |
91 | } | |
92 | ||
4c7f4426 | 93 | WatchdogAction get_watchdog_action(void) |
0d035b6c BT |
94 | { |
95 | return watchdog_action; | |
96 | } | |
97 | ||
9dd986cc RJ |
98 | /* This actually performs the "action" once a watchdog has expired, |
99 | * ie. reboot, shutdown, exit, etc. | |
100 | */ | |
101 | void watchdog_perform_action(void) | |
102 | { | |
2f44a08b | 103 | switch (watchdog_action) { |
4c7f4426 | 104 | case WATCHDOG_ACTION_RESET: /* same as 'system_reset' in monitor */ |
3ab72385 | 105 | qapi_event_send_watchdog(WATCHDOG_ACTION_RESET); |
cf83f140 | 106 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
9dd986cc RJ |
107 | break; |
108 | ||
4c7f4426 | 109 | case WATCHDOG_ACTION_SHUTDOWN: /* same as 'system_powerdown' in monitor */ |
3ab72385 | 110 | qapi_event_send_watchdog(WATCHDOG_ACTION_SHUTDOWN); |
9dd986cc RJ |
111 | qemu_system_powerdown_request(); |
112 | break; | |
113 | ||
4c7f4426 | 114 | case WATCHDOG_ACTION_POWEROFF: /* same as 'quit' command in monitor */ |
3ab72385 | 115 | qapi_event_send_watchdog(WATCHDOG_ACTION_POWEROFF); |
9dd986cc | 116 | exit(0); |
9dd986cc | 117 | |
4c7f4426 | 118 | case WATCHDOG_ACTION_PAUSE: /* same as 'stop' command in monitor */ |
30e5210a PB |
119 | /* In a timer callback, when vm_stop calls qemu_clock_enable |
120 | * you would get a deadlock. Bypass the problem. | |
121 | */ | |
122 | qemu_system_vmstop_request_prepare(); | |
3ab72385 | 123 | qapi_event_send_watchdog(WATCHDOG_ACTION_PAUSE); |
30e5210a | 124 | qemu_system_vmstop_request(RUN_STATE_WATCHDOG); |
9dd986cc RJ |
125 | break; |
126 | ||
4c7f4426 | 127 | case WATCHDOG_ACTION_DEBUG: |
3ab72385 | 128 | qapi_event_send_watchdog(WATCHDOG_ACTION_DEBUG); |
9dd986cc RJ |
129 | fprintf(stderr, "watchdog: timer fired\n"); |
130 | break; | |
131 | ||
4c7f4426 | 132 | case WATCHDOG_ACTION_NONE: |
3ab72385 | 133 | qapi_event_send_watchdog(WATCHDOG_ACTION_NONE); |
9dd986cc | 134 | break; |
795dc6e4 | 135 | |
4c7f4426 | 136 | case WATCHDOG_ACTION_INJECT_NMI: |
3ab72385 | 137 | qapi_event_send_watchdog(WATCHDOG_ACTION_INJECT_NMI); |
f7e981f2 | 138 | nmi_monitor_handle(0, NULL); |
795dc6e4 | 139 | break; |
4c7f4426 MP |
140 | |
141 | default: | |
142 | assert(0); | |
9dd986cc RJ |
143 | } |
144 | } | |
f0df84c6 MP |
145 | |
146 | void qmp_watchdog_set_action(WatchdogAction action, Error **errp) | |
147 | { | |
148 | watchdog_action = action; | |
149 | } |