Commit 795dc6e4 authored by Mao Chuan Li's avatar Mao Chuan Li Committed by Christian Borntraeger

watchdog: Add new Virtual Watchdog action INJECT-NMI

This patch allows QEMU to inject a NMI into a guest when the
watchdog expires.
Signed-off-by: 's avatarMao Chuan Li <maochuan@linux.vnet.ibm.com>
Reviewed-by: 's avatarDavid Hildenbrand <dahi@linux.vnet.ibm.com>
CC: Eric Blake <eblake@redhat.com>
CC: Markus Armbruster <armbru@redhat.com>
Signed-off-by: 's avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent f9a535e0
......@@ -27,6 +27,7 @@
#include "sysemu/sysemu.h"
#include "sysemu/watchdog.h"
#include "qapi-event.h"
#include "hw/nmi.h"
/* Possible values for action parameter. */
#define WDT_RESET 1 /* Hard reset. */
......@@ -35,6 +36,7 @@
#define WDT_PAUSE 4 /* Pause. */
#define WDT_DEBUG 5 /* Prints a message and continues running. */
#define WDT_NONE 6 /* Do nothing. */
#define WDT_NMI 7 /* Inject nmi into the guest */
static int watchdog_action = WDT_RESET;
static QLIST_HEAD(watchdog_list, WatchdogTimerModel) watchdog_list;
......@@ -95,6 +97,8 @@ int select_watchdog_action(const char *p)
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;
......@@ -138,5 +142,11 @@ void watchdog_perform_action(void)
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);
inject_nmi();
break;
}
}
......@@ -3746,10 +3746,14 @@
#
# @none: nothing is done
#
# @inject-nmi: a non-maskable interrupt is injected into the first VCPU (all
# VCPUS on x86) (since 2.4)
#
# Since: 2.1
##
{ 'enum': 'WatchdogExpirationAction',
'data': [ 'reset', 'shutdown', 'poweroff', 'pause', 'debug', 'none' ] }
'data': [ 'reset', 'shutdown', 'poweroff', 'pause', 'debug', 'none',
'inject-nmi' ] }
##
# @IoOperationType
......
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