aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorXu Wang <gesaint@linux.vnet.ibm.com>2015-02-05 18:28:32 +0800
committerChristian Borntraeger <borntraeger@de.ibm.com>2015-06-11 17:45:49 +0200
commit188f24c2c149bcb0088c6317e99e09afc007de34 (patch)
tree6d6e9ad12085b657dcf72647f1cafa528e21a03d
parentd7933ef3ac81149a51ba43ddac9fe70405008aba (diff)
s390x/watchdog: introduce diag288 watchdog device
This patch introduces a new diag288 watchdog device that will, just like other watchdogs, monitor a guest and take corresponding actions when it detects that the guest is not responding. diag288 is s390x specific. The wiring to s390x KVM will be done in separate patches. Signed-off-by: Xu Wang <gesaint@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> [split out qemu-option.hx base changes]
-rw-r--r--default-configs/s390x-softmmu.mak1
-rw-r--r--hw/watchdog/Makefile.objs1
-rw-r--r--hw/watchdog/wdt_diag288.c110
-rw-r--r--include/hw/watchdog/wdt_diag288.h36
-rw-r--r--qemu-options.hx3
5 files changed, 151 insertions, 0 deletions
diff --git a/default-configs/s390x-softmmu.mak b/default-configs/s390x-softmmu.mak
index f9e13f177e..36e15de336 100644
--- a/default-configs/s390x-softmmu.mak
+++ b/default-configs/s390x-softmmu.mak
@@ -4,3 +4,4 @@ CONFIG_VIRTIO=y
CONFIG_SCLPCONSOLE=y
CONFIG_S390_FLIC=y
CONFIG_S390_FLIC_KVM=$(CONFIG_KVM)
+CONFIG_WDT_DIAG288=y
diff --git a/hw/watchdog/Makefile.objs b/hw/watchdog/Makefile.objs
index 4b0374a555..72e3ffd93c 100644
--- a/hw/watchdog/Makefile.objs
+++ b/hw/watchdog/Makefile.objs
@@ -1,3 +1,4 @@
common-obj-y += watchdog.o
common-obj-$(CONFIG_WDT_IB6300ESB) += wdt_i6300esb.o
common-obj-$(CONFIG_WDT_IB700) += wdt_ib700.o
+common-obj-$(CONFIG_WDT_DIAG288) += wdt_diag288.o
diff --git a/hw/watchdog/wdt_diag288.c b/hw/watchdog/wdt_diag288.c
new file mode 100644
index 0000000000..351b5a8f9d
--- /dev/null
+++ b/hw/watchdog/wdt_diag288.c
@@ -0,0 +1,110 @@
+/*
+ * 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 void wdt_diag288_reset(DeviceState *dev)
+{
+ DIAG288State *diag288 = DIAG288(dev);
+
+ diag288->enabled = false;
+ timer_del(diag288->timer);
+}
+
+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);
+
+ 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);
+ 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)
diff --git a/include/hw/watchdog/wdt_diag288.h b/include/hw/watchdog/wdt_diag288.h
new file mode 100644
index 0000000000..7f3fd450dc
--- /dev/null
+++ b/include/hw/watchdog/wdt_diag288.h
@@ -0,0 +1,36 @@
+#ifndef WDT_DIAG288_H
+#define WDT_DIAG288_H
+
+#include "hw/qdev.h"
+
+#define TYPE_WDT_DIAG288 "diag288"
+#define DIAG288(obj) \
+ OBJECT_CHECK(DIAG288State, (obj), TYPE_WDT_DIAG288)
+#define DIAG288_CLASS(klass) \
+ OBJECT_CLASS_CHECK(DIAG288Class, (klass), TYPE_WDT_DIAG288)
+#define DIAG288_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(DIAG288Class, (obj), TYPE_WDT_DIAG288)
+
+#define WDT_DIAG288_INIT 0
+#define WDT_DIAG288_CHANGE 1
+#define WDT_DIAG288_CANCEL 2
+
+typedef struct DIAG288State {
+ /*< private >*/
+ DeviceState parent_obj;
+ QEMUTimer *timer;
+ bool enabled;
+
+ /*< public >*/
+} DIAG288State;
+
+typedef struct DIAG288Class {
+ /*< private >*/
+ DeviceClass parent_class;
+
+ /*< public >*/
+ int (*handle_timer)(DIAG288State *dev,
+ uint64_t func, uint64_t timeout);
+} DIAG288Class;
+
+#endif /* WDT_DIAG288_H */
diff --git a/qemu-options.hx b/qemu-options.hx
index a295c0f82b..d31fe35cae 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -3174,6 +3174,9 @@ iBASE 700 is a very simple ISA watchdog with a single timer.
@item i6300esb
Intel 6300ESB I/O controller hub is a much more featureful PCI-based
dual-timer watchdog.
+@item diag288
+A virtual watchdog for s390x backed by the diagnose 288 hypercall
+(currently KVM only).
@end table
ETEXI