[PATCH v4 09/14] none-machine: allow cold plugging sysbus devices

[Damien Hedde <damien.hedde@greensocs.com>]

Allow plugging any sysbus device on this machine (the sysbus
devices still need to be 'user-creatable').

This commit is needed to use the 'none' machine as a base, and
subsequently to dynamically populate it with sysbus devices using
qapi commands.

Note that this only concern cold-plug: sysbus devices cann't be hot
plugged because the sysbus bus does not support it.

Signed-off-by: Damien Hedde <damien.hedde@greensocs.com>
---
 hw/core/null-machine.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/core/null-machine.c b/hw/core/null-machine.c
index 5fd1cc0218..702b56232d 100644
--- a/hw/core/null-machine.c
+++ b/hw/core/null-machine.c
@@ -17,6 +17,7 @@
 #include "exec/address-spaces.h"
 #include "hw/core/cpu.h"
 #include "qapi/visitor.h"
+#include "hw/sysbus.h"
 
 struct NoneMachineState {
     MachineState parent;
@@ -93,6 +94,9 @@ static void machine_none_class_init(ObjectClass *oc, void *data)
         NULL, NULL);
     object_class_property_set_description(oc, "ram-addr",
         "Base address of the RAM (default is 0)");
+
+    /* allow cold plugging any any "user-creatable" sysbus device */
+    machine_class_allow_dynamic_sysbus_dev(mc, TYPE_SYS_BUS_DEVICE);
 }
 
 static const TypeInfo none_machine_info = {
-- 
2.35.1