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hw/watchdog: add trace events for watchdog action handling

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The tracepoints aid in debugging the triggering of watchdog devices.

Reviewed-by: Richard W.M. Jones <rjones@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20221216125749.596075-4-berrange@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2022-12-16 07:57:47 -05:00 committed by Michael S. Tsirkin
parent c8c7c406db
commit 6f10a29e76
2 changed files with 8 additions and 0 deletions
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4
hw/watchdog/trace-events
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@ -16,3 +16,7 @@ spapr_watchdog_stop(uint64_t num, uint64_t ret) "num=%" PRIu64 " ret=%" PRId64
spapr_watchdog_query(uint64_t caps) "caps=0x%" PRIx64
spapr_watchdog_query_lpm(uint64_t caps) "caps=0x%" PRIx64
spapr_watchdog_expired(uint64_t num, unsigned action) "num=%" PRIu64 " action=%u"
# watchdog.c
watchdog_perform_action(unsigned int action) "action=%u"
watchdog_set_action(unsigned int action) "action=%u"

4
hw/watchdog/watchdog.c
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@ -30,6 +30,7 @@
#include "sysemu/watchdog.h"
#include "hw/nmi.h"
#include "qemu/help_option.h"
#include "trace.h"
static WatchdogAction watchdog_action = WATCHDOG_ACTION_RESET;
@ -43,6 +44,8 @@ WatchdogAction get_watchdog_action(void)
*/
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);
@ -89,4 +92,5 @@ void watchdog_perform_action(void)
void qmp_watchdog_set_action(WatchdogAction action, Error **errp)
{
watchdog_action = action;
trace_watchdog_set_action(watchdog_action);
}