mirror of
https://github.com/qemu/qemu.git
synced 2024-12-13 14:33:31 +08:00
f7e981f295
nmi_monitor_handle is wired to call the x86 nmi handler. So, we can directly use it at call sites. Signed-off-by: Bandan Das <bsd@redhat.com> Message-Id: <1463761717-26558-3-git-send-email-bsd@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
150 lines
4.6 KiB
C
150 lines
4.6 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/qmp/types.h"
|
|
#include "sysemu/sysemu.h"
|
|
#include "sysemu/watchdog.h"
|
|
#include "qapi-event.h"
|
|
#include "hw/nmi.h"
|
|
#include "qemu/help_option.h"
|
|
|
|
static int watchdog_action = WDT_RESET;
|
|
static QLIST_HEAD(watchdog_list, 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;
|
|
}
|
|
|
|
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 if (strcasecmp(p, "inject-nmi") == 0)
|
|
watchdog_action = WDT_NMI;
|
|
else
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int 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 WDT_RESET: /* same as 'system_reset' in monitor */
|
|
qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_RESET, &error_abort);
|
|
qemu_system_reset_request();
|
|
break;
|
|
|
|
case WDT_SHUTDOWN: /* same as 'system_powerdown' in monitor */
|
|
qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_SHUTDOWN, &error_abort);
|
|
qemu_system_powerdown_request();
|
|
break;
|
|
|
|
case WDT_POWEROFF: /* same as 'quit' command in monitor */
|
|
qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_POWEROFF, &error_abort);
|
|
exit(0);
|
|
|
|
case WDT_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_EXPIRATION_ACTION_PAUSE, &error_abort);
|
|
qemu_system_vmstop_request(RUN_STATE_WATCHDOG);
|
|
break;
|
|
|
|
case WDT_DEBUG:
|
|
qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_DEBUG, &error_abort);
|
|
fprintf(stderr, "watchdog: timer fired\n");
|
|
break;
|
|
|
|
case WDT_NONE:
|
|
qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_NONE, &error_abort);
|
|
break;
|
|
|
|
case WDT_NMI:
|
|
qapi_event_send_watchdog(WATCHDOG_EXPIRATION_ACTION_INJECT_NMI,
|
|
&error_abort);
|
|
nmi_monitor_handle(0, NULL);
|
|
break;
|
|
}
|
|
}
|