[PATCH v11 5/6] introduce a new qom device to deal with panicked event
If the target is x86/x86_64, the guest's kernel will write 0x01 to the
port KVM_PV_EVENT_PORT when it is panciked. This patch introduces a new
qom device kvm_pv_ioport to listen this I/O port, and deal with panicked
event according to panicked_action's value. The possible actions are:
1. emit QEVENT_GUEST_PANICKED only
2. emit QEVENT_GUEST_PANICKED and pause the guest
3. emit QEVENT_GUEST_PANICKED and poweroff the guest
4. emit QEVENT_GUEST_PANICKED and reset the guest
I/O ports does not work for some targets(for example: s390). And you
can implement another qom device, and include it's code into pv_event.c
for such target.
Note: if we emit QEVENT_GUEST_PANICKED only, and the management
application does not receive this event(the management may not
run when the event is emitted), the management won't know the
guest is panicked.
Signed-off-by: Wen Congyang
Signed-off-by: Hu Tao
---
hw/kvm/Makefile.objs |2 +-
hw/kvm/pv_event.c| 197 ++
hw/pc_piix.c |5 ++
kvm-stub.c |4 +
kvm.h|2 +
5 files changed, 209 insertions(+), 1 deletion(-)
create mode 100644 hw/kvm/pv_event.c
diff --git a/hw/kvm/Makefile.objs b/hw/kvm/Makefile.objs
index f620d7f..cf93199 100644
--- a/hw/kvm/Makefile.objs
+++ b/hw/kvm/Makefile.objs
@@ -1 +1 @@
-obj-$(CONFIG_KVM) += clock.o apic.o i8259.o ioapic.o i8254.o pci-assign.o
+obj-$(CONFIG_KVM) += clock.o apic.o i8259.o ioapic.o i8254.o pci-assign.o
pv_event.o
diff --git a/hw/kvm/pv_event.c b/hw/kvm/pv_event.c
new file mode 100644
index 000..112491e
--- /dev/null
+++ b/hw/kvm/pv_event.c
@@ -0,0 +1,197 @@
+/*
+ * QEMU KVM support, paravirtual event device
+ *
+ * Copyright Fujitsu, Corp. 2012
+ *
+ * Authors:
+ * Wen Congyang
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+/* Possible values for action parameter. */
+#define PANICKED_REPORT 1 /* emit QEVENT_GUEST_PANICKED only */
+#define PANICKED_PAUSE 2 /* emit QEVENT_GUEST_PANICKED and pause VM */
+#define PANICKED_POWEROFF 3 /* emit QEVENT_GUEST_PANICKED and quit VM */
+#define PANICKED_RESET 4 /* emit QEVENT_GUEST_PANICKED and reset VM */
+
+#define PV_EVENT_DRIVER "kvm_pv_event"
+
+struct PVEventAction {
+char *panicked_action;
+int panicked_action_value;
+};
+
+#define DEFINE_PV_EVENT_PROPERTIES(_state, _conf) \
+DEFINE_PROP_STRING("panicked_action", _state, _conf.panicked_action)
+
+static void panicked_mon_event(const char *action)
+{
+QObject *data;
+
+data = qobject_from_jsonf("{ 'action': %s }", action);
+monitor_protocol_event(QEVENT_GUEST_PANICKED, data);
+qobject_decref(data);
+}
+
+static void panicked_perform_action(uint32_t panicked_action)
+{
+switch (panicked_action) {
+case PANICKED_REPORT:
+panicked_mon_event("report");
+break;
+
+case PANICKED_PAUSE:
+panicked_mon_event("pause");
+vm_stop(RUN_STATE_GUEST_PANICKED);
+break;
+
+case PANICKED_POWEROFF:
+panicked_mon_event("poweroff");
+qemu_system_shutdown_request();
+break;
+
+case PANICKED_RESET:
+panicked_mon_event("reset");
+qemu_system_reset_request();
+break;
+}
+}
+
+static uint64_t supported_event(void)
+{
+return 1 << KVM_PV_FEATURE_PANICKED;
+}
+
+static void handle_event(int event, struct PVEventAction *conf)
+{
+if (event == KVM_PV_EVENT_PANICKED) {
+panicked_perform_action(conf->panicked_action_value);
+}
+}
+
+static int pv_event_init(struct PVEventAction *conf)
+{
+if (!conf->panicked_action) {
+conf->panicked_action_value = PANICKED_REPORT;
+} else if (strcasecmp(conf->panicked_action, "none") == 0) {
+conf->panicked_action_value = PANICKED_REPORT;
+} else if (strcasecmp(conf->panicked_action, "pause") == 0) {
+conf->panicked_action_value = PANICKED_PAUSE;
+} else if (strcasecmp(conf->panicked_action, "poweroff") == 0) {
+conf->panicked_action_value = PANICKED_POWEROFF;
+} else if (strcasecmp(conf->panicked_action, "reset") == 0) {
+conf->panicked_action_value = PANICKED_RESET;
+} else {
+return -1;
+}
+
+return 0;
+}
+
+#if defined(KVM_PV_EVENT_PORT)
+
+#include "hw/isa.h"
+
+typedef struct {
+ISADevice dev;
+struct PVEventAction conf;
+MemoryRegion ioport;
+} PVIOPortState;
+
+static uint64_t pv_io_read(void *opaque, hwaddr addr, unsigned size)
+{
+return supported_event();
+}
+
+static void pv_io_write(void *opaque, hwaddr addr, uint64_t val,
+unsigned size)
+{
+PVIOPortState *s = opaque;
+
+handle_event(val, >conf);
+}
+
+static const MemoryRegionOps pv_io_ops = {
+.read = pv_io_read,
+.write = pv_io_write,
+.impl = {
+
[PATCH v11 5/6] introduce a new qom device to deal with panicked event
If the target is x86/x86_64, the guest's kernel will write 0x01 to the
port KVM_PV_EVENT_PORT when it is panciked. This patch introduces a new
qom device kvm_pv_ioport to listen this I/O port, and deal with panicked
event according to panicked_action's value. The possible actions are:
1. emit QEVENT_GUEST_PANICKED only
2. emit QEVENT_GUEST_PANICKED and pause the guest
3. emit QEVENT_GUEST_PANICKED and poweroff the guest
4. emit QEVENT_GUEST_PANICKED and reset the guest
I/O ports does not work for some targets(for example: s390). And you
can implement another qom device, and include it's code into pv_event.c
for such target.
Note: if we emit QEVENT_GUEST_PANICKED only, and the management
application does not receive this event(the management may not
run when the event is emitted), the management won't know the
guest is panicked.
Signed-off-by: Wen Congyang we...@cn.fujitsu.com
Signed-off-by: Hu Tao hu...@cn.fujitsu.com
---
hw/kvm/Makefile.objs |2 +-
hw/kvm/pv_event.c| 197 ++
hw/pc_piix.c |5 ++
kvm-stub.c |4 +
kvm.h|2 +
5 files changed, 209 insertions(+), 1 deletion(-)
create mode 100644 hw/kvm/pv_event.c
diff --git a/hw/kvm/Makefile.objs b/hw/kvm/Makefile.objs
index f620d7f..cf93199 100644
--- a/hw/kvm/Makefile.objs
+++ b/hw/kvm/Makefile.objs
@@ -1 +1 @@
-obj-$(CONFIG_KVM) += clock.o apic.o i8259.o ioapic.o i8254.o pci-assign.o
+obj-$(CONFIG_KVM) += clock.o apic.o i8259.o ioapic.o i8254.o pci-assign.o
pv_event.o
diff --git a/hw/kvm/pv_event.c b/hw/kvm/pv_event.c
new file mode 100644
index 000..112491e
--- /dev/null
+++ b/hw/kvm/pv_event.c
@@ -0,0 +1,197 @@
+/*
+ * QEMU KVM support, paravirtual event device
+ *
+ * Copyright Fujitsu, Corp. 2012
+ *
+ * Authors:
+ * Wen Congyang we...@cn.fujitsu.com
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include linux/kvm_para.h
+#include asm/kvm_para.h
+#include qobject.h
+#include qjson.h
+#include monitor.h
+#include sysemu.h
+#include kvm.h
+
+/* Possible values for action parameter. */
+#define PANICKED_REPORT 1 /* emit QEVENT_GUEST_PANICKED only */
+#define PANICKED_PAUSE 2 /* emit QEVENT_GUEST_PANICKED and pause VM */
+#define PANICKED_POWEROFF 3 /* emit QEVENT_GUEST_PANICKED and quit VM */
+#define PANICKED_RESET 4 /* emit QEVENT_GUEST_PANICKED and reset VM */
+
+#define PV_EVENT_DRIVER kvm_pv_event
+
+struct PVEventAction {
+char *panicked_action;
+int panicked_action_value;
+};
+
+#define DEFINE_PV_EVENT_PROPERTIES(_state, _conf) \
+DEFINE_PROP_STRING(panicked_action, _state, _conf.panicked_action)
+
+static void panicked_mon_event(const char *action)
+{
+QObject *data;
+
+data = qobject_from_jsonf({ 'action': %s }, action);
+monitor_protocol_event(QEVENT_GUEST_PANICKED, data);
+qobject_decref(data);
+}
+
+static void panicked_perform_action(uint32_t panicked_action)
+{
+switch (panicked_action) {
+case PANICKED_REPORT:
+panicked_mon_event(report);
+break;
+
+case PANICKED_PAUSE:
+panicked_mon_event(pause);
+vm_stop(RUN_STATE_GUEST_PANICKED);
+break;
+
+case PANICKED_POWEROFF:
+panicked_mon_event(poweroff);
+qemu_system_shutdown_request();
+break;
+
+case PANICKED_RESET:
+panicked_mon_event(reset);
+qemu_system_reset_request();
+break;
+}
+}
+
+static uint64_t supported_event(void)
+{
+return 1 KVM_PV_FEATURE_PANICKED;
+}
+
+static void handle_event(int event, struct PVEventAction *conf)
+{
+if (event == KVM_PV_EVENT_PANICKED) {
+panicked_perform_action(conf-panicked_action_value);
+}
+}
+
+static int pv_event_init(struct PVEventAction *conf)
+{
+if (!conf-panicked_action) {
+conf-panicked_action_value = PANICKED_REPORT;
+} else if (strcasecmp(conf-panicked_action, none) == 0) {
+conf-panicked_action_value = PANICKED_REPORT;
+} else if (strcasecmp(conf-panicked_action, pause) == 0) {
+conf-panicked_action_value = PANICKED_PAUSE;
+} else if (strcasecmp(conf-panicked_action, poweroff) == 0) {
+conf-panicked_action_value = PANICKED_POWEROFF;
+} else if (strcasecmp(conf-panicked_action, reset) == 0) {
+conf-panicked_action_value = PANICKED_RESET;
+} else {
+return -1;
+}
+
+return 0;
+}
+
+#if defined(KVM_PV_EVENT_PORT)
+
+#include hw/isa.h
+
+typedef struct {
+ISADevice dev;
+struct PVEventAction conf;
+MemoryRegion ioport;
+} PVIOPortState;
+
+static uint64_t pv_io_read(void *opaque, hwaddr addr, unsigned size)
+{
+return supported_event();
+}
+
+static void pv_io_write(void *opaque, hwaddr addr, uint64_t val,
+unsigned size)
+{
+PVIOPortState *s = opaque;
+
+handle_event(val, s-conf);
+}
+
+static const MemoryRegionOps
