[Qemu-devel] [PATCH 11/12] qemu: add crash_occurred flag into CPUState

["Denis V. Lunev" <den@openvz.org>]

From: Andrey Smetanin <asmetanin@virtuozzo.com>

CPUState->crash_occurred value inside CPUState marks
that guest crash occurred. This value added into cpu common
migration subsection.

Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Andreas Färber <afaerber@suse.de>
---
 exec.c            | 19 +++++++++++++++++++
 include/qom/cpu.h |  1 +
 vl.c              |  3 +++
 3 files changed, 23 insertions(+)

diff --git a/exec.c b/exec.c
index f7883d2..adf49e8 100644
--- a/exec.c
+++ b/exec.c
@@ -465,6 +465,24 @@ static const VMStateDescription vmstate_cpu_common_exception_index = {
     }
 };
 
+static bool cpu_common_crash_occurred_needed(void *opaque)
+{
+    CPUState *cpu = opaque;
+
+    return cpu->crash_occurred != 0;
+}
+
+static const VMStateDescription vmstate_cpu_common_crash_occurred = {
+    .name = "cpu_common/crash_occurred",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = cpu_common_crash_occurred_needed,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT32(crash_occurred, CPUState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 const VMStateDescription vmstate_cpu_common = {
     .name = "cpu_common",
     .version_id = 1,
@@ -478,6 +496,7 @@ const VMStateDescription vmstate_cpu_common = {
     },
     .subsections = (const VMStateDescription*[]) {
         &vmstate_cpu_common_exception_index,
+        &vmstate_cpu_common_crash_occurred,
         NULL
     }
 };
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index 39f0f19..f559a69 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -263,6 +263,7 @@ struct CPUState {
     bool created;
     bool stop;
     bool stopped;
+    uint32_t crash_occurred;
     volatile sig_atomic_t exit_request;
     uint32_t interrupt_request;
     int singlestep_enabled;
diff --git a/vl.c b/vl.c
index 38eee1f..9e0aee5 100644
--- a/vl.c
+++ b/vl.c
@@ -1723,6 +1723,9 @@ void qemu_system_reset(bool report)
 
 void qemu_system_guest_panicked(void)
 {
+    if (current_cpu) {
+        current_cpu->crash_occurred = 1;
+    }
     qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE, &error_abort);
     vm_stop(RUN_STATE_GUEST_PANICKED);
 }
-- 
2.1.4