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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" | |
7b1b5d19 | 26 | #include "qapi/qmp/types.h" |
9c17d615 | 27 | #include "sysemu/sysemu.h" |
0d09e41a | 28 | #include "sysemu/watchdog.h" |
99eaf09c | 29 | #include "qapi-event.h" |
795dc6e4 | 30 | #include "hw/nmi.h" |
f348b6d1 | 31 | #include "qemu/help_option.h" |
9dd986cc | 32 | |
88b3be20 | 33 | static int watchdog_action = WDT_RESET; |
72cf2d4f | 34 | static QLIST_HEAD(watchdog_list, WatchdogTimerModel) watchdog_list; |
9dd986cc RJ |
35 | |
36 | void watchdog_add_model(WatchdogTimerModel *model) | |
37 | { | |
72cf2d4f | 38 | QLIST_INSERT_HEAD(&watchdog_list, model, entry); |
9dd986cc RJ |
39 | } |
40 | ||
41 | /* Returns: | |
42 | * 0 = continue | |
43 | * 1 = exit program with error | |
44 | * 2 = exit program without error | |
45 | */ | |
46 | int select_watchdog(const char *p) | |
47 | { | |
48 | WatchdogTimerModel *model; | |
09aaa160 | 49 | QemuOpts *opts; |
9dd986cc RJ |
50 | |
51 | /* -watchdog ? lists available devices and exits cleanly. */ | |
c8057f95 | 52 | if (is_help_option(p)) { |
72cf2d4f | 53 | QLIST_FOREACH(model, &watchdog_list, entry) { |
9dd986cc RJ |
54 | fprintf(stderr, "\t%s\t%s\n", |
55 | model->wdt_name, model->wdt_description); | |
56 | } | |
57 | return 2; | |
58 | } | |
59 | ||
72cf2d4f | 60 | QLIST_FOREACH(model, &watchdog_list, entry) { |
9dd986cc | 61 | if (strcasecmp(model->wdt_name, p) == 0) { |
09aaa160 | 62 | /* add the device */ |
87ea75d5 PC |
63 | opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, |
64 | &error_abort); | |
f43e47db | 65 | qemu_opt_set(opts, "driver", p, &error_abort); |
9dd986cc RJ |
66 | return 0; |
67 | } | |
68 | } | |
69 | ||
70 | fprintf(stderr, "Unknown -watchdog device. Supported devices are:\n"); | |
72cf2d4f | 71 | QLIST_FOREACH(model, &watchdog_list, entry) { |
9dd986cc RJ |
72 | fprintf(stderr, "\t%s\t%s\n", |
73 | model->wdt_name, model->wdt_description); | |
74 | } | |
75 | return 1; | |
76 | } | |
77 | ||
78 | int select_watchdog_action(const char *p) | |
79 | { | |
80 | if (strcasecmp(p, "reset") == 0) | |
81 | watchdog_action = WDT_RESET; | |
82 | else if (strcasecmp(p, "shutdown") == 0) | |
83 | watchdog_action = WDT_SHUTDOWN; | |
84 | else if (strcasecmp(p, "poweroff") == 0) | |
85 | watchdog_action = WDT_POWEROFF; | |
86 | else if (strcasecmp(p, "pause") == 0) | |
87 | watchdog_action = WDT_PAUSE; | |
88 | else if (strcasecmp(p, "debug") == 0) | |
89 | watchdog_action = WDT_DEBUG; | |
90 | else if (strcasecmp(p, "none") == 0) | |
91 | watchdog_action = WDT_NONE; | |
795dc6e4 MCL |
92 | else if (strcasecmp(p, "inject-nmi") == 0) |
93 | watchdog_action = WDT_NMI; | |
9dd986cc RJ |
94 | else |
95 | return -1; | |
96 | ||
97 | return 0; | |
98 | } | |
99 | ||
0d035b6c BT |
100 | int get_watchdog_action(void) |
101 | { | |
102 | return watchdog_action; | |
103 | } | |
104 | ||
9dd986cc RJ |
105 | /* This actually performs the "action" once a watchdog has expired, |
106 | * ie. reboot, shutdown, exit, etc. | |
107 | */ | |
108 | void watchdog_perform_action(void) | |
109 | { | |
2f44a08b | 110 | switch (watchdog_action) { |
9dd986cc | 111 | case WDT_RESET: /* same as 'system_reset' in monitor */ |
99eaf09c | 112 | qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_RESET, &error_abort); |
cf83f140 | 113 | qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
9dd986cc RJ |
114 | break; |
115 | ||
116 | case WDT_SHUTDOWN: /* same as 'system_powerdown' in monitor */ | |
99eaf09c | 117 | qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_SHUTDOWN, &error_abort); |
9dd986cc RJ |
118 | qemu_system_powerdown_request(); |
119 | break; | |
120 | ||
121 | case WDT_POWEROFF: /* same as 'quit' command in monitor */ | |
99eaf09c | 122 | qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_POWEROFF, &error_abort); |
9dd986cc | 123 | exit(0); |
9dd986cc RJ |
124 | |
125 | case WDT_PAUSE: /* same as 'stop' command in monitor */ | |
30e5210a PB |
126 | /* In a timer callback, when vm_stop calls qemu_clock_enable |
127 | * you would get a deadlock. Bypass the problem. | |
128 | */ | |
129 | qemu_system_vmstop_request_prepare(); | |
99eaf09c | 130 | qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_PAUSE, &error_abort); |
30e5210a | 131 | qemu_system_vmstop_request(RUN_STATE_WATCHDOG); |
9dd986cc RJ |
132 | break; |
133 | ||
134 | case WDT_DEBUG: | |
99eaf09c | 135 | qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_DEBUG, &error_abort); |
9dd986cc RJ |
136 | fprintf(stderr, "watchdog: timer fired\n"); |
137 | break; | |
138 | ||
139 | case WDT_NONE: | |
99eaf09c | 140 | qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_NONE, &error_abort); |
9dd986cc | 141 | break; |
795dc6e4 MCL |
142 | |
143 | case WDT_NMI: | |
144 | qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_INJECT_NMI, | |
145 | &error_abort); | |
f7e981f2 | 146 | nmi_monitor_handle(0, NULL); |
795dc6e4 | 147 | break; |
9dd986cc RJ |
148 | } |
149 | } |