machine: Add machine_register_compat_props() function

Move the compat_props handling to core machine code.

Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

hw/core/machine.c

@@ -560,6 +560,22 @@ static void machine_class_finalize(ObjectClass *klass, void *data)
     }
 }
 
+void machine_register_compat_props(MachineState *machine)
+{
+    MachineClass *mc = MACHINE_GET_CLASS(machine);
+    int i;
+    GlobalProperty *p;
+
+    if (!mc->compat_props) {
+        return;
+    }
+
+    for (i = 0; i < mc->compat_props->len; i++) {
+        p = g_array_index(mc->compat_props, GlobalProperty *, i);
+        qdev_prop_register_global(p);
+    }
+}
+
 static const TypeInfo machine_info = {
     .name = TYPE_MACHINE,
     .parent = TYPE_OBJECT,

include/hw/boards.h

@@ -40,6 +40,7 @@ int machine_kvm_shadow_mem(MachineState *machine);
 int machine_phandle_start(MachineState *machine);
 bool machine_dump_guest_core(MachineState *machine);
 bool machine_mem_merge(MachineState *machine);
+void machine_register_compat_props(MachineState *machine);
 
 /**
  * CPUArchId:

vl.c

@@ -4448,13 +4448,8 @@ int main(int argc, char **argv, char **envp)
             exit (i == 1 ? 1 : 0);
     }
 
-    if (machine_class->compat_props) {
-        GlobalProperty *p;
-        for (i = 0; i < machine_class->compat_props->len; i++) {
-            p = g_array_index(machine_class->compat_props, GlobalProperty *, i);
-            qdev_prop_register_global(p);
-        }
-    }
+    machine_register_compat_props(current_machine);
+
     qemu_opts_foreach(qemu_find_opts("global"),
                       global_init_func, NULL, NULL);