If the watchdog expires and the guest is not notified (NONE, DEBUG, PAUSE),
we must not reset the watchdog device, otherwise watchdog_ping() and
watchdog_stop() will fail when triggered by the guest. This reset behavior
matches to the z/VM behavior when a custom command is to be executed
on expiry.
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Bo Tu <tubo@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
{
qemu_log_mask(CPU_LOG_RESET, "Watchdog timer expired.\n");
watchdog_perform_action();
+ /* Reset the watchdog only if the guest was notified about expiry. */
+ switch (get_watchdog_action()) {
+ case WDT_DEBUG:
+ case WDT_NONE:
+ case WDT_PAUSE:
+ return;
+ }
wdt_diag288_reset(dev);
}