From 9dd986ccf68f142aaafe543d80cf877716d91d4e Mon Sep 17 00:00:00 2001 From: "Richard W.M. Jones" Date: Sat, 25 Apr 2009 13:56:19 +0100 Subject: Hardware watchdog Here is an updated hardware watchdog patch, which should fix everything that was raised about the previous version ... Signed-off-by: Richard W.M. Jones Signed-off-by: Anthony Liguori --- hw/watchdog.c | 136 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 136 insertions(+) create mode 100644 hw/watchdog.c (limited to 'hw/watchdog.c') diff --git a/hw/watchdog.c b/hw/watchdog.c new file mode 100644 index 0000000000..c64868d2c4 --- /dev/null +++ b/hw/watchdog.c @@ -0,0 +1,136 @@ +/* + * Virtual hardware watchdog. + * + * Copyright (C) 2009 Red Hat Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + * USA. + * + * By Richard W.M. Jones (rjones@redhat.com). + */ + +#include "qemu-common.h" +#include "sys-queue.h" +#include "sysemu.h" +#include "hw/watchdog.h" + +static LIST_HEAD(watchdog_list, WatchdogTimerModel) watchdog_list; + +void watchdog_add_model(WatchdogTimerModel *model) +{ + LIST_INSERT_HEAD(&watchdog_list, model, entry); +} + +/* Returns: + * 0 = continue + * 1 = exit program with error + * 2 = exit program without error + */ +int select_watchdog(const char *p) +{ + WatchdogTimerModel *model; + + if (watchdog) { + fprintf(stderr, + "qemu: only one watchdog option may be given\n"); + return 1; + } + + /* -watchdog ? lists available devices and exits cleanly. */ + if (strcmp(p, "?") == 0) { + LIST_FOREACH(model, &watchdog_list, entry) { + fprintf(stderr, "\t%s\t%s\n", + model->wdt_name, model->wdt_description); + } + return 2; + } + + LIST_FOREACH(model, &watchdog_list, entry) { + if (strcasecmp(model->wdt_name, p) == 0) { + watchdog = model; + return 0; + } + } + + fprintf(stderr, "Unknown -watchdog device. Supported devices are:\n"); + LIST_FOREACH(model, &watchdog_list, entry) { + fprintf(stderr, "\t%s\t%s\n", + model->wdt_name, model->wdt_description); + } + return 1; +} + +int select_watchdog_action(const char *p) +{ + if (strcasecmp(p, "reset") == 0) + watchdog_action = WDT_RESET; + else if (strcasecmp(p, "shutdown") == 0) + watchdog_action = WDT_SHUTDOWN; + else if (strcasecmp(p, "poweroff") == 0) + watchdog_action = WDT_POWEROFF; + else if (strcasecmp(p, "pause") == 0) + watchdog_action = WDT_PAUSE; + else if (strcasecmp(p, "debug") == 0) + watchdog_action = WDT_DEBUG; + else if (strcasecmp(p, "none") == 0) + watchdog_action = WDT_NONE; + else + return -1; + + return 0; +} + +/* This actually performs the "action" once a watchdog has expired, + * ie. reboot, shutdown, exit, etc. + */ +void watchdog_perform_action(void) +{ + switch(watchdog_action) { + case WDT_RESET: /* same as 'system_reset' in monitor */ + qemu_system_reset_request(); + break; + + case WDT_SHUTDOWN: /* same as 'system_powerdown' in monitor */ + qemu_system_powerdown_request(); + break; + + case WDT_POWEROFF: /* same as 'quit' command in monitor */ + exit(0); + break; + + case WDT_PAUSE: /* same as 'stop' command in monitor */ + vm_stop(0); + break; + + case WDT_DEBUG: + fprintf(stderr, "watchdog: timer fired\n"); + break; + + case WDT_NONE: + break; + } +} + +void watchdog_pc_init(PCIBus *pci_bus) +{ + if (watchdog) + watchdog->wdt_pc_init(pci_bus); +} + +void register_watchdogs(void) +{ + wdt_ib700_init(); + wdt_i6300esb_init(); +} -- cgit v1.2.3