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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 | ||
22 | #include "qemu-common.h" | |
23 | #include "sys-queue.h" | |
24 | #include "sysemu.h" | |
25 | #include "hw/watchdog.h" | |
26 | ||
88b3be20 MA |
27 | /* Possible values for action parameter. */ |
28 | #define WDT_RESET 1 /* Hard reset. */ | |
29 | #define WDT_SHUTDOWN 2 /* Shutdown. */ | |
30 | #define WDT_POWEROFF 3 /* Quit. */ | |
31 | #define WDT_PAUSE 4 /* Pause. */ | |
32 | #define WDT_DEBUG 5 /* Prints a message and continues running. */ | |
33 | #define WDT_NONE 6 /* Do nothing. */ | |
34 | ||
35 | static WatchdogTimerModel *watchdog; | |
36 | static int watchdog_action = WDT_RESET; | |
9dd986cc RJ |
37 | static LIST_HEAD(watchdog_list, WatchdogTimerModel) watchdog_list; |
38 | ||
39 | void watchdog_add_model(WatchdogTimerModel *model) | |
40 | { | |
41 | LIST_INSERT_HEAD(&watchdog_list, model, entry); | |
42 | } | |
43 | ||
44 | /* Returns: | |
45 | * 0 = continue | |
46 | * 1 = exit program with error | |
47 | * 2 = exit program without error | |
48 | */ | |
49 | int select_watchdog(const char *p) | |
50 | { | |
51 | WatchdogTimerModel *model; | |
52 | ||
53 | if (watchdog) { | |
54 | fprintf(stderr, | |
55 | "qemu: only one watchdog option may be given\n"); | |
56 | return 1; | |
57 | } | |
58 | ||
59 | /* -watchdog ? lists available devices and exits cleanly. */ | |
60 | if (strcmp(p, "?") == 0) { | |
61 | LIST_FOREACH(model, &watchdog_list, entry) { | |
62 | fprintf(stderr, "\t%s\t%s\n", | |
63 | model->wdt_name, model->wdt_description); | |
64 | } | |
65 | return 2; | |
66 | } | |
67 | ||
68 | LIST_FOREACH(model, &watchdog_list, entry) { | |
69 | if (strcasecmp(model->wdt_name, p) == 0) { | |
70 | watchdog = model; | |
71 | return 0; | |
72 | } | |
73 | } | |
74 | ||
75 | fprintf(stderr, "Unknown -watchdog device. Supported devices are:\n"); | |
76 | LIST_FOREACH(model, &watchdog_list, entry) { | |
77 | fprintf(stderr, "\t%s\t%s\n", | |
78 | model->wdt_name, model->wdt_description); | |
79 | } | |
80 | return 1; | |
81 | } | |
82 | ||
83 | int select_watchdog_action(const char *p) | |
84 | { | |
85 | if (strcasecmp(p, "reset") == 0) | |
86 | watchdog_action = WDT_RESET; | |
87 | else if (strcasecmp(p, "shutdown") == 0) | |
88 | watchdog_action = WDT_SHUTDOWN; | |
89 | else if (strcasecmp(p, "poweroff") == 0) | |
90 | watchdog_action = WDT_POWEROFF; | |
91 | else if (strcasecmp(p, "pause") == 0) | |
92 | watchdog_action = WDT_PAUSE; | |
93 | else if (strcasecmp(p, "debug") == 0) | |
94 | watchdog_action = WDT_DEBUG; | |
95 | else if (strcasecmp(p, "none") == 0) | |
96 | watchdog_action = WDT_NONE; | |
97 | else | |
98 | return -1; | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | /* This actually performs the "action" once a watchdog has expired, | |
104 | * ie. reboot, shutdown, exit, etc. | |
105 | */ | |
106 | void watchdog_perform_action(void) | |
107 | { | |
108 | switch(watchdog_action) { | |
109 | case WDT_RESET: /* same as 'system_reset' in monitor */ | |
110 | qemu_system_reset_request(); | |
111 | break; | |
112 | ||
113 | case WDT_SHUTDOWN: /* same as 'system_powerdown' in monitor */ | |
114 | qemu_system_powerdown_request(); | |
115 | break; | |
116 | ||
117 | case WDT_POWEROFF: /* same as 'quit' command in monitor */ | |
118 | exit(0); | |
119 | break; | |
120 | ||
121 | case WDT_PAUSE: /* same as 'stop' command in monitor */ | |
122 | vm_stop(0); | |
123 | break; | |
124 | ||
125 | case WDT_DEBUG: | |
126 | fprintf(stderr, "watchdog: timer fired\n"); | |
127 | break; | |
128 | ||
129 | case WDT_NONE: | |
130 | break; | |
131 | } | |
132 | } | |
133 | ||
134 | void watchdog_pc_init(PCIBus *pci_bus) | |
135 | { | |
136 | if (watchdog) | |
137 | watchdog->wdt_pc_init(pci_bus); | |
138 | } | |
139 | ||
140 | void register_watchdogs(void) | |
141 | { | |
142 | wdt_ib700_init(); | |
143 | wdt_i6300esb_init(); | |
144 | } |