David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 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 |
David 'Digit' Turner | a5d4120 | 2010-05-10 18:37:10 -0700 | [diff] [blame] | 17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 18 | * |
| 19 | * By Richard W.M. Jones (rjones@redhat.com). |
| 20 | */ |
| 21 | |
| 22 | #include "qemu-common.h" |
David 'Digit' Turner | a5d4120 | 2010-05-10 18:37:10 -0700 | [diff] [blame] | 23 | #include "qemu-queue.h" |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 24 | #include "sysemu.h" |
| 25 | #include "hw/watchdog.h" |
| 26 | |
David 'Digit' Turner | a5d4120 | 2010-05-10 18:37:10 -0700 | [diff] [blame] | 27 | static QLIST_HEAD(watchdog_list, WatchdogTimerModel) watchdog_list; |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 28 | |
| 29 | void watchdog_add_model(WatchdogTimerModel *model) |
| 30 | { |
David 'Digit' Turner | a5d4120 | 2010-05-10 18:37:10 -0700 | [diff] [blame] | 31 | QLIST_INSERT_HEAD(&watchdog_list, model, entry); |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 32 | } |
| 33 | |
| 34 | /* Returns: |
| 35 | * 0 = continue |
| 36 | * 1 = exit program with error |
| 37 | * 2 = exit program without error |
| 38 | */ |
| 39 | int select_watchdog(const char *p) |
| 40 | { |
| 41 | WatchdogTimerModel *model; |
| 42 | |
| 43 | if (watchdog) { |
| 44 | fprintf(stderr, |
| 45 | "qemu: only one watchdog option may be given\n"); |
| 46 | return 1; |
| 47 | } |
| 48 | |
| 49 | /* -watchdog ? lists available devices and exits cleanly. */ |
| 50 | if (strcmp(p, "?") == 0) { |
David 'Digit' Turner | a5d4120 | 2010-05-10 18:37:10 -0700 | [diff] [blame] | 51 | QLIST_FOREACH(model, &watchdog_list, entry) { |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 52 | fprintf(stderr, "\t%s\t%s\n", |
| 53 | model->wdt_name, model->wdt_description); |
| 54 | } |
| 55 | return 2; |
| 56 | } |
| 57 | |
David 'Digit' Turner | a5d4120 | 2010-05-10 18:37:10 -0700 | [diff] [blame] | 58 | QLIST_FOREACH(model, &watchdog_list, entry) { |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 59 | if (strcasecmp(model->wdt_name, p) == 0) { |
| 60 | watchdog = model; |
| 61 | return 0; |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | fprintf(stderr, "Unknown -watchdog device. Supported devices are:\n"); |
David 'Digit' Turner | a5d4120 | 2010-05-10 18:37:10 -0700 | [diff] [blame] | 66 | QLIST_FOREACH(model, &watchdog_list, entry) { |
David 'Digit' Turner | 5d8f37a | 2009-09-14 14:32:27 -0700 | [diff] [blame] | 67 | fprintf(stderr, "\t%s\t%s\n", |
| 68 | model->wdt_name, model->wdt_description); |
| 69 | } |
| 70 | return 1; |
| 71 | } |
| 72 | |
| 73 | int select_watchdog_action(const char *p) |
| 74 | { |
| 75 | if (strcasecmp(p, "reset") == 0) |
| 76 | watchdog_action = WDT_RESET; |
| 77 | else if (strcasecmp(p, "shutdown") == 0) |
| 78 | watchdog_action = WDT_SHUTDOWN; |
| 79 | else if (strcasecmp(p, "poweroff") == 0) |
| 80 | watchdog_action = WDT_POWEROFF; |
| 81 | else if (strcasecmp(p, "pause") == 0) |
| 82 | watchdog_action = WDT_PAUSE; |
| 83 | else if (strcasecmp(p, "debug") == 0) |
| 84 | watchdog_action = WDT_DEBUG; |
| 85 | else if (strcasecmp(p, "none") == 0) |
| 86 | watchdog_action = WDT_NONE; |
| 87 | else |
| 88 | return -1; |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | /* This actually performs the "action" once a watchdog has expired, |
| 94 | * ie. reboot, shutdown, exit, etc. |
| 95 | */ |
| 96 | void watchdog_perform_action(void) |
| 97 | { |
| 98 | switch(watchdog_action) { |
| 99 | case WDT_RESET: /* same as 'system_reset' in monitor */ |
| 100 | qemu_system_reset_request(); |
| 101 | break; |
| 102 | |
| 103 | case WDT_SHUTDOWN: /* same as 'system_powerdown' in monitor */ |
| 104 | qemu_system_powerdown_request(); |
| 105 | break; |
| 106 | |
| 107 | case WDT_POWEROFF: /* same as 'quit' command in monitor */ |
| 108 | exit(0); |
| 109 | break; |
| 110 | |
| 111 | case WDT_PAUSE: /* same as 'stop' command in monitor */ |
| 112 | vm_stop(0); |
| 113 | break; |
| 114 | |
| 115 | case WDT_DEBUG: |
| 116 | fprintf(stderr, "watchdog: timer fired\n"); |
| 117 | break; |
| 118 | |
| 119 | case WDT_NONE: |
| 120 | break; |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | void watchdog_pc_init(PCIBus *pci_bus) |
| 125 | { |
| 126 | if (watchdog) |
| 127 | watchdog->wdt_pc_init(pci_bus); |
| 128 | } |
| 129 | |
| 130 | void register_watchdogs(void) |
| 131 | { |
| 132 | #if 0 |
| 133 | wdt_ib700_init(); |
| 134 | wdt_i6300esb_init(); |
| 135 | #endif |
| 136 | } |