On Mon, 20 Oct 2025, Philippe Mathieu-Daudé wrote:
On 20/10/25 17:11, Philippe Mathieu-Daudé wrote:
+Pierrick

On 20/10/25 17:05, Philippe Mathieu-Daudé wrote:
On 18/10/25 17:11, BALATON Zoltan wrote:
Add a more general DEFINE_MACHINE_EXTENDED macro and define simpler
versions with less parameters based on that. This is inspired by how
the OBJECT_DEFINE macros do this in a similar way to allow using the
shortened definition in more complex cases too.

Signed-off-by: BALATON Zoltan <[email protected]>
---
  include/hw/boards.h | 16 ++++++++++++++--
  1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/include/hw/boards.h b/include/hw/boards.h
index 665b620121..fd3d549ff5 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -762,7 +762,8 @@ struct MachineState {
          } \
      } while (0)
-#define DEFINE_MACHINE(namestr, machine_initfn) \
+#define DEFINE_MACHINE_EXTENDED(namestr, PARENT_NAME, InstanceName, \
+                                machine_initfn, ABSTRACT, ...) \
      static void machine_initfn##_class_init(ObjectClass *oc, const void *data) \
      { \
          MachineClass *mc = MACHINE_CLASS(oc); \
@@ -770,8 +771,11 @@ struct MachineState {
      } \
      static const TypeInfo machine_initfn##_typeinfo = { \
          .name       = MACHINE_TYPE_NAME(namestr), \
-        .parent     = TYPE_MACHINE, \
+        .parent     = TYPE_##PARENT_NAME, \
          .class_init = machine_initfn##_class_init, \
+        .instance_size = sizeof(InstanceName), \
+        .abstract = ABSTRACT, \

IIUC we don't want to have abstract type with interfaces, but
only QOM leaves. So maybe better always use .abstract = false in
DEFINE_MACHINE_EXTENDED()?

+        .interfaces = (const InterfaceInfo[]) { __VA_ARGS__ } , \

IIUC Richard asked for array argument in order to save .rodata?

      }; \
      static void machine_initfn##_register_types(void) \
      { \
@@ -779,6 +783,14 @@ struct MachineState {
      } \
      type_init(machine_initfn##_register_types)
+#define DEFINE_MACHINE(namestr, machine_initfn) \
+    DEFINE_MACHINE_EXTENDED(namestr, MACHINE, MachineState, machine_initfn, \
+                            false, { })
+
+#define DEFINE_MACHINE_WITH_INTERFACES(namestr, machine_initfn, ...) \
+    DEFINE_MACHINE_EXTENDED(namestr, MACHINE, MachineState, machine_initfn, \
+                            false, __VA_ARGS__)

Hmm how can be sure the __VA_ARGS__ argument is { NULL } terminated?

The same way as for OBJECT_DEFINE_TYPE_EXTENDED. This is modelled after that as noted in the commit message.

Regards,
BALATON Zoltan

+
  extern GlobalProperty hw_compat_10_1[];
  extern const size_t hw_compat_10_1_len;


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