From: Peter Xu <peterx@redhat.com>
Date: Wed, 19 Apr 2023 16:17:37 +0000 (-0400)
Subject: vl.c: Create late backends before migration object
X-Git-Tag: pull-xen-20230607~105^2~3
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=cb9d8b8ce1aaf38f53295fc59ec1b8b7eb4338d2;p=people%2Faperard%2Fqemu-dm.git

vl.c: Create late backends before migration object

The migration object may want to check against different types of memory
when initialized.  Delay the creation to be after late backends.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
---

diff --git a/softmmu/vl.c b/softmmu/vl.c
index 5cb72a56fc..fb6c221e8e 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -3583,14 +3583,19 @@ void qemu_init(int argc, char **argv)
                      machine_class->name, machine_class->deprecation_reason);
     }
 
+    /*
+     * Create backends before creating migration objects, so that it can
+     * check against compatibilities on the backend memories (e.g. postcopy
+     * over memory-backend-file objects).
+     */
+    qemu_create_late_backends();
+
     /*
      * Note: creates a QOM object, must run only after global and
      * compat properties have been set up.
      */
     migration_object_init();
 
-    qemu_create_late_backends();
-
     /* parse features once if machine provides default cpu_type */
     current_machine->cpu_type = machine_class->default_cpu_type;
     if (cpu_option) {