mirror of
https://github.com/qemu/qemu.git
synced 2024-11-30 07:13:38 +08:00
0c7322cfd3
The diag288 watchdog is no sysbus device, therefore it doesn't get triggered on resets automatically using dc->reset. Let's register the reset handler manually, so we get correctly notified again when a system reset was requested. Also reset the watchdog on subsystem resets that don't trigger a full system reset. Signed-off-by: Xu Wang <gesaint@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Andreas Färber <afaerber@suse.de>
131 lines
3.2 KiB
C
131 lines
3.2 KiB
C
/*
|
|
* watchdog device diag288 support
|
|
*
|
|
* Copyright IBM, Corp. 2015
|
|
*
|
|
* Authors:
|
|
* Xu Wang <gesaint@linux.vnet.ibm.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or (at your
|
|
* option) any later version. See the COPYING file in the top-level directory.
|
|
*
|
|
*/
|
|
|
|
#include "sysemu/watchdog.h"
|
|
#include "hw/sysbus.h"
|
|
#include "qemu/timer.h"
|
|
#include "hw/watchdog/wdt_diag288.h"
|
|
|
|
static WatchdogTimerModel model = {
|
|
.wdt_name = TYPE_WDT_DIAG288,
|
|
.wdt_description = "diag288 device for s390x platform",
|
|
};
|
|
|
|
static const VMStateDescription vmstate_diag288 = {
|
|
.name = "vmstate_diag288",
|
|
.version_id = 0,
|
|
.minimum_version_id = 0,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_TIMER_PTR(timer, DIAG288State),
|
|
VMSTATE_BOOL(enabled, DIAG288State),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static void wdt_diag288_reset(DeviceState *dev)
|
|
{
|
|
DIAG288State *diag288 = DIAG288(dev);
|
|
|
|
diag288->enabled = false;
|
|
timer_del(diag288->timer);
|
|
}
|
|
|
|
static void diag288_reset(void *opaque)
|
|
{
|
|
DeviceState *diag288 = opaque;
|
|
|
|
wdt_diag288_reset(diag288);
|
|
}
|
|
|
|
static void diag288_timer_expired(void *dev)
|
|
{
|
|
qemu_log_mask(CPU_LOG_RESET, "Watchdog timer expired.\n");
|
|
watchdog_perform_action();
|
|
wdt_diag288_reset(dev);
|
|
}
|
|
|
|
static int wdt_diag288_handle_timer(DIAG288State *diag288,
|
|
uint64_t func, uint64_t timeout)
|
|
{
|
|
switch (func) {
|
|
case WDT_DIAG288_INIT:
|
|
diag288->enabled = true;
|
|
/* fall through */
|
|
case WDT_DIAG288_CHANGE:
|
|
if (!diag288->enabled) {
|
|
return -1;
|
|
}
|
|
timer_mod(diag288->timer,
|
|
qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
|
|
timeout * get_ticks_per_sec());
|
|
break;
|
|
case WDT_DIAG288_CANCEL:
|
|
if (!diag288->enabled) {
|
|
return -1;
|
|
}
|
|
diag288->enabled = false;
|
|
timer_del(diag288->timer);
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void wdt_diag288_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
DIAG288State *diag288 = DIAG288(dev);
|
|
|
|
qemu_register_reset(diag288_reset, diag288);
|
|
diag288->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, diag288_timer_expired,
|
|
dev);
|
|
}
|
|
|
|
static void wdt_diag288_unrealize(DeviceState *dev, Error **errp)
|
|
{
|
|
DIAG288State *diag288 = DIAG288(dev);
|
|
|
|
timer_del(diag288->timer);
|
|
timer_free(diag288->timer);
|
|
}
|
|
|
|
static void wdt_diag288_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
DIAG288Class *diag288 = DIAG288_CLASS(klass);
|
|
|
|
dc->realize = wdt_diag288_realize;
|
|
dc->unrealize = wdt_diag288_unrealize;
|
|
dc->reset = wdt_diag288_reset;
|
|
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
|
|
dc->vmsd = &vmstate_diag288;
|
|
diag288->handle_timer = wdt_diag288_handle_timer;
|
|
}
|
|
|
|
static const TypeInfo wdt_diag288_info = {
|
|
.class_init = wdt_diag288_class_init,
|
|
.parent = TYPE_DEVICE,
|
|
.name = TYPE_WDT_DIAG288,
|
|
.instance_size = sizeof(DIAG288State),
|
|
.class_size = sizeof(DIAG288Class),
|
|
};
|
|
|
|
static void wdt_diag288_register_types(void)
|
|
{
|
|
watchdog_add_model(&model);
|
|
type_register_static(&wdt_diag288_info);
|
|
}
|
|
|
|
type_init(wdt_diag288_register_types)
|