hw/arm: Register TYPE_TARGET_ARM/AARCH64_MACHINE QOM interfaces

Define the TYPE_TARGET_ARM_MACHINE and TYPE_TARGET_AARCH64_MACHINE
QOM interface names to allow machines to implement them.

Register these interfaces in common code in target_info-qom.c used
by all binaries because QOM interfaces must be registered before
being checked (see next commit with the 'none' machine).

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20251021205741.57109-2-philmd@linaro.org>

include/hw/arm/machines-qom.h

@@ -0,0 +1,18 @@
+/*
+ * QOM type definitions for ARM / Aarch64 machines
+ *
+ *  Copyright (c) Linaro
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef HW_ARM_MACHINES_QOM_H
+#define HW_ARM_MACHINES_QOM_H
+
+#define TYPE_TARGET_ARM_MACHINE \
+        "target-info-arm-machine"
+
+#define TYPE_TARGET_AARCH64_MACHINE \
+        "target-info-aarch64-machine"
+
+#endif

meson.build

@@ -3911,6 +3911,7 @@ common_ss.add(pagevary)
 specific_ss.add(files('page-vary-target.c'))
 
 common_ss.add(files('target-info.c'))
+system_ss.add(files('target-info-qom.c'))
 specific_ss.add(files('target-info-stub.c'))
 
 subdir('backends')

target-info-qom.c

@@ -0,0 +1,24 @@
+/*
+ * QEMU binary/target API (QOM types)
+ *
+ *  Copyright (c) Linaro
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qom/object.h"
+#include "hw/arm/machines-qom.h"
+
+static const TypeInfo target_info_types[] = {
+    {
+        .name           = TYPE_TARGET_ARM_MACHINE,
+        .parent         = TYPE_INTERFACE,
+    },
+    {
+        .name           = TYPE_TARGET_AARCH64_MACHINE,
+        .parent         = TYPE_INTERFACE,
+    },
+};
+
+DEFINE_TYPES(target_info_types)