135 lines
3.5 KiB
C
135 lines
3.5 KiB
C
/*
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* Virtual hardware watchdog.
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*
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* Copyright (C) 2009 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* By Richard W.M. Jones (rjones@redhat.com).
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*/
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#include "qemu-common.h"
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#include "sys-queue.h"
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#include "sysemu.h"
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#include "hw/watchdog.h"
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static LIST_HEAD(watchdog_list, WatchdogTimerModel) watchdog_list;
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void watchdog_add_model(WatchdogTimerModel *model)
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{
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LIST_INSERT_HEAD(&watchdog_list, model, entry);
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}
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/* Returns:
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* 0 = continue
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* 1 = exit program with error
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* 2 = exit program without error
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*/
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int select_watchdog(const char *p)
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{
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WatchdogTimerModel *model;
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if (watchdog) {
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fprintf(stderr,
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"qemu: only one watchdog option may be given\n");
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return 1;
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}
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/* -watchdog ? lists available devices and exits cleanly. */
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if (strcmp(p, "?") == 0) {
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LIST_FOREACH(model, &watchdog_list, entry) {
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fprintf(stderr, "\t%s\t%s\n",
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model->wdt_name, model->wdt_description);
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}
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return 2;
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}
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LIST_FOREACH(model, &watchdog_list, entry) {
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if (strcasecmp(model->wdt_name, p) == 0) {
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watchdog = model;
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return 0;
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}
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}
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fprintf(stderr, "Unknown -watchdog device. Supported devices are:\n");
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LIST_FOREACH(model, &watchdog_list, entry) {
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fprintf(stderr, "\t%s\t%s\n",
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model->wdt_name, model->wdt_description);
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}
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return 1;
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}
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int select_watchdog_action(const char *p)
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{
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if (strcasecmp(p, "reset") == 0)
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watchdog_action = WDT_RESET;
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else if (strcasecmp(p, "shutdown") == 0)
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watchdog_action = WDT_SHUTDOWN;
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else if (strcasecmp(p, "poweroff") == 0)
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watchdog_action = WDT_POWEROFF;
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else if (strcasecmp(p, "pause") == 0)
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watchdog_action = WDT_PAUSE;
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else if (strcasecmp(p, "debug") == 0)
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watchdog_action = WDT_DEBUG;
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else if (strcasecmp(p, "none") == 0)
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watchdog_action = WDT_NONE;
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else
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return -1;
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return 0;
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}
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/* This actually performs the "action" once a watchdog has expired,
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* ie. reboot, shutdown, exit, etc.
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*/
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void watchdog_perform_action(void)
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{
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switch(watchdog_action) {
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case WDT_RESET: /* same as 'system_reset' in monitor */
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qemu_system_reset_request();
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break;
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case WDT_SHUTDOWN: /* same as 'system_powerdown' in monitor */
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qemu_system_powerdown_request();
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break;
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case WDT_POWEROFF: /* same as 'quit' command in monitor */
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exit(0);
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break;
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case WDT_PAUSE: /* same as 'stop' command in monitor */
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vm_stop(0);
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break;
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case WDT_DEBUG:
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fprintf(stderr, "watchdog: timer fired\n");
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break;
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case WDT_NONE:
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break;
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}
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}
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void watchdog_pc_init(PCIBus *pci_bus)
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{
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if (watchdog)
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watchdog->wdt_pc_init(pci_bus);
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}
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void register_watchdogs(void)
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{
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wdt_ib700_init();
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wdt_i6300esb_init();
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}
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