mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-23 19:49:43 +00:00
22afb46e7c
Instead of invoking select_watchdog_action from both HMP and command line, go directly from HMP to QMP and use QemuOpts as the intermediary for the command line. This makes -watchdog-action explicitly a shortcut for "-action watchdog", so that "-watchdog-action" and "-action watchdog" override each other based on the position on the command line; previously, "-action watchdog" always won. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
136 lines
4.1 KiB
C
136 lines
4.1 KiB
C
/*
|
|
* 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"
|
|
|
|
static WatchdogAction watchdog_action = WATCHDOG_ACTION_RESET;
|
|
static QLIST_HEAD(, WatchdogTimerModel) watchdog_list;
|
|
|
|
void watchdog_add_model(WatchdogTimerModel *model)
|
|
{
|
|
QLIST_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;
|
|
QemuOpts *opts;
|
|
|
|
/* -watchdog ? lists available devices and exits cleanly. */
|
|
if (is_help_option(p)) {
|
|
QLIST_FOREACH(model, &watchdog_list, entry) {
|
|
fprintf(stderr, "\t%s\t%s\n",
|
|
model->wdt_name, model->wdt_description);
|
|
}
|
|
return 2;
|
|
}
|
|
|
|
QLIST_FOREACH(model, &watchdog_list, entry) {
|
|
if (strcasecmp(model->wdt_name, p) == 0) {
|
|
/* add the device */
|
|
opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
|
|
&error_abort);
|
|
qemu_opt_set(opts, "driver", p, &error_abort);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
fprintf(stderr, "Unknown -watchdog device. Supported devices are:\n");
|
|
QLIST_FOREACH(model, &watchdog_list, entry) {
|
|
fprintf(stderr, "\t%s\t%s\n",
|
|
model->wdt_name, model->wdt_description);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
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)
|
|
{
|
|
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:
|
|
assert(0);
|
|
}
|
|
}
|
|
|
|
void qmp_watchdog_set_action(WatchdogAction action, Error **errp)
|
|
{
|
|
watchdog_action = action;
|
|
}
|