1 files changed, 51 insertions, 0 deletions
diff --git a/migration/colo-comm.c b/migration/colo-comm.c
new file mode 100644
index 0000000000..a2d5185a8a
--- /dev/null
+++ b/migration/colo-comm.c
@@ -0,0 +1,51 @@
+/*
+ * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
+ * (a.k.a. Fault Tolerance or Continuous Replication)
+ *
+ * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
+ * Copyright (c) 2016 FUJITSU LIMITED
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * 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 "qemu/osdep.h"
+#include <migration/colo.h>
+#include "trace.h"
+
+typedef struct {
+     bool colo_requested;
+} COLOInfo;
+
+static COLOInfo colo_info;
+
+static void colo_info_pre_save(void *opaque)
+{
+    COLOInfo *s = opaque;
+
+    s->colo_requested = migrate_colo_enabled();
+}
+
+static bool colo_info_need(void *opaque)
+{
+   return migrate_colo_enabled();
+}
+
+static const VMStateDescription colo_state = {
+    .name = "COLOState",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .pre_save = colo_info_pre_save,
+    .needed = colo_info_need,
+    .fields = (VMStateField[]) {
+        VMSTATE_BOOL(colo_requested, COLOInfo),
+        VMSTATE_END_OF_LIST()
+    },
+};
+
+void colo_info_init(void)
+{
+    vmstate_register(NULL, 0, &colo_state, &colo_info);
+}