migration: Switch to COLO process after finishing loadvm

Switch from normal migration loadvm process into COLO checkpoint process if
COLO mode is enabled.

We add three new members to struct MigrationIncomingState,
'have_colo_incoming_thread' and 'colo_incoming_thread' record the COLO
related thread for secondary VM, 'migration_incoming_co' records the
original migration incoming coroutine.

Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Amit Shah <amit@amitshah.net>

1 files changed, 10 insertions, 0 deletions

diff --git a/migration/colo-comm.c b/migration/colo-comm.c
index a2d5185..bf44f76 100644
--- a/migration/colo-comm.c
+++ b/migration/colo-comm.c
@@ -49,3 +49,13 @@ void colo_info_init(void)
 {
     vmstate_register(NULL, 0, &colo_state, &colo_info);
 }
+
+bool migration_incoming_enable_colo(void)
+{
+    return colo_info.colo_requested;
+}
+
+void migration_incoming_exit_colo(void)
+{
+    colo_info.colo_requested = false;
+}