[PATCH v2] deal with guest paniced event

Wen Congyang
2012-03-07T01:57:23Z

When the host knows the guest is paniced, it will set
exit_reason to KVM_EXIT_GUEST_PANICED. So if qemu receive
this exit_reason, we can send a event to tell management
application that the guest is paniced and set the guest
status to RUN_STATE_PANICED.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
---
kvm-all.c | 4 ++++
linux-headers/linux/kvm.h | 1 +
monitor.c | 3 +++
monitor.h | 1 +
qapi-schema.json | 2 +-
qmp.c | 3 ++-
vl.c | 1 +
7 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/kvm-all.c b/kvm-all.c
index c4babda..d356948 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1190,6 +1190,10 @@ int kvm_cpu_exec(CPUState *env)
(uint64_t)run->hw.hardware_exit_reason);
ret = -1;
break;
+ case KVM_EXIT_GUEST_PANICED:
+ monitor_protocol_event(QEVENT_GUEST_PANICED, NULL);
+ vm_stop(RUN_STATE_PANICED);
+ break;
case KVM_EXIT_INTERNAL_ERROR:
ret = kvm_handle_internal_error(env, run);
break;
diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index f6b5343..ddc9716 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -163,6 +163,7 @@ struct kvm_pit_config {
#define KVM_EXIT_OSI 18
#define KVM_EXIT_PAPR_HCALL 19
#define KVM_EXIT_S390_UCONTROL 20
+#define KVM_EXIT_GUEST_PANICED 21

/* For KVM_EXIT_INTERNAL_ERROR */
#define KVM_INTERNAL_ERROR_EMULATION 1
diff --git a/monitor.c b/monitor.c
index 953e748..9802792 100644
--- a/monitor.c
+++ b/monitor.c
@@ -494,6 +494,9 @@ void monitor_protocol_event(MonitorEvent event, QObject *data)
case QEVENT_WAKEUP:
event_name = "WAKEUP";
break;
+ case QEVENT_GUEST_PANICED:
+ event_name = "GUEST_PANICED";
+ break;
default:
abort();
break;
diff --git a/monitor.h b/monitor.h
index 0d49800..a62da93 100644
--- a/monitor.h
+++ b/monitor.h
@@ -41,6 +41,7 @@ typedef enum MonitorEvent {
QEVENT_DEVICE_TRAY_MOVED,
QEVENT_SUSPEND,
QEVENT_WAKEUP,
+ QEVENT_GUEST_PANICED,
QEVENT_MAX,
} MonitorEvent;

diff --git a/qapi-schema.json b/qapi-schema.json
index d0b6792..dd4b7a0 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -121,7 +121,7 @@
{ 'enum': 'RunState',
'data': [ 'debug', 'inmigrate', 'internal-error', 'io-error', 'paused',
'postmigrate', 'prelaunch', 'finish-migrate', 'restore-vm',
- 'running', 'save-vm', 'shutdown', 'watchdog' ] }
+ 'running', 'save-vm', 'shutdown', 'watchdog', 'paniced' ] }

##
# @StatusInfo:
diff --git a/qmp.c b/qmp.c
index a182b51..eeb6d3b 100644
--- a/qmp.c
+++ b/qmp.c
@@ -148,7 +148,8 @@ void qmp_cont(Error **errp)
error_set(errp, QERR_MIGRATION_EXPECTED);
return;
} else if (runstate_check(RUN_STATE_INTERNAL_ERROR) ||
- runstate_check(RUN_STATE_SHUTDOWN)) {
+ runstate_check(RUN_STATE_SHUTDOWN) ||
+ runstate_check(RUN_STATE_PANICED)) {
error_set(errp, QERR_RESET_REQUIRED);
return;
}
diff --git a/vl.c b/vl.c
index 1d4c350..d9c13cf 100644
--- a/vl.c
+++ b/vl.c
@@ -359,6 +359,7 @@ static const RunStateTransition runstate_transitions_def[] = {
{ RUN_STATE_RUNNING, RUN_STATE_SAVE_VM },
{ RUN_STATE_RUNNING, RUN_STATE_SHUTDOWN },
{ RUN_STATE_RUNNING, RUN_STATE_WATCHDOG },
+ { RUN_STATE_RUNNING, RUN_STATE_PANICED },

{ RUN_STATE_SAVE_VM, RUN_STATE_RUNNING },

--
1.7.1