target/loongarch: Introduce abstract TYPE_LOONGARCH64_CPU

In preparation of introducing TYPE_LOONGARCH32_CPU, introduce
an abstract TYPE_LOONGARCH64_CPU.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230821125959.28666-5-philmd@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>

target/loongarch/cpu.c

@@ -734,9 +734,9 @@ static void loongarch_cpu_class_init(ObjectClass *c, void *data)
 #endif
 }
 
-#define DEFINE_LOONGARCH_CPU_TYPE(model, initfn) \
+#define DEFINE_LOONGARCH_CPU_TYPE(size, model, initfn) \
     { \
-        .parent = TYPE_LOONGARCH_CPU, \
+        .parent = TYPE_LOONGARCH##size##_CPU, \
         .instance_init = initfn, \
         .name = LOONGARCH_CPU_TYPE_NAME(model), \
     }
@@ -752,7 +752,13 @@ static const TypeInfo loongarch_cpu_type_infos[] = {
         .class_size = sizeof(LoongArchCPUClass),
         .class_init = loongarch_cpu_class_init,
     },
-    DEFINE_LOONGARCH_CPU_TYPE("la464", loongarch_la464_initfn),
+    {
+        .name = TYPE_LOONGARCH64_CPU,
+        .parent = TYPE_LOONGARCH_CPU,
+
+        .abstract = true,
+    },
+    DEFINE_LOONGARCH_CPU_TYPE(64, "la464", loongarch_la464_initfn),
 };
 
 DEFINE_TYPES(loongarch_cpu_type_infos)

target/loongarch/cpu.h

@@ -377,6 +377,7 @@ struct ArchCPU {
 };
 
 #define TYPE_LOONGARCH_CPU "loongarch-cpu"
+#define TYPE_LOONGARCH64_CPU "loongarch64-cpu"
 
 OBJECT_DECLARE_CPU_TYPE(LoongArchCPU, LoongArchCPUClass,
                         LOONGARCH_CPU)