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/*
* 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, see <http://www.gnu.org/licenses/>.
*
* By Richard W.M. Jones (rjones@redhat.com).
*/
#include "qemu/osdep.h"
#include "qemu/option.h"
#include "qemu/config-file.h"
#include "qemu/queue.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-run-state.h"
#include "qapi/qapi-events-run-state.h"
#include "sysemu/runstate.h"
#include "sysemu/watchdog.h"
#include "hw/nmi.h"
#include "qemu/help_option.h"
#include "trace.h"
static WatchdogAction watchdog_action = WATCHDOG_ACTION_RESET;
WatchdogAction get_watchdog_action(void)
{
return watchdog_action;
}
/* This actually performs the "action" once a watchdog has expired,
* ie. reboot, shutdown, exit, etc.
*/
void watchdog_perform_action(void)
{
trace_watchdog_perform_action(watchdog_action);
switch (watchdog_action) {
case WATCHDOG_ACTION_RESET: /* same as 'system_reset' in monitor */
qapi_event_send_watchdog(WATCHDOG_ACTION_RESET);
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
break;
case WATCHDOG_ACTION_SHUTDOWN: /* same as 'system_powerdown' in monitor */
qapi_event_send_watchdog(WATCHDOG_ACTION_SHUTDOWN);
qemu_system_powerdown_request();
break;
case WATCHDOG_ACTION_POWEROFF: /* same as 'quit' command in monitor */
qapi_event_send_watchdog(WATCHDOG_ACTION_POWEROFF);
exit(0);
case WATCHDOG_ACTION_PAUSE: /* same as 'stop' command in monitor */
/* In a timer callback, when vm_stop calls qemu_clock_enable
* you would get a deadlock. Bypass the problem.
*/
qemu_system_vmstop_request_prepare();
qapi_event_send_watchdog(WATCHDOG_ACTION_PAUSE);
qemu_system_vmstop_request(RUN_STATE_WATCHDOG);
break;
case WATCHDOG_ACTION_DEBUG:
qapi_event_send_watchdog(WATCHDOG_ACTION_DEBUG);
fprintf(stderr, "watchdog: timer fired\n");
break;
case WATCHDOG_ACTION_NONE:
qapi_event_send_watchdog(WATCHDOG_ACTION_NONE);
break;
case WATCHDOG_ACTION_INJECT_NMI:
qapi_event_send_watchdog(WATCHDOG_ACTION_INJECT_NMI);
nmi_monitor_handle(0, NULL);
break;
default:
g_assert_not_reached();
}
}
void qmp_watchdog_set_action(WatchdogAction action, Error **errp)
{
watchdog_action = action;
trace_watchdog_set_action(watchdog_action);
}
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