diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c
index e21715592a..5573468a7d 100644
--- a/target/loongarch/cpu.c
+++ b/target/loongarch/cpu.c
@@ -571,12 +571,22 @@ static void loongarch_cpu_init(Object *obj)
 static ObjectClass *loongarch_cpu_class_by_name(const char *cpu_model)
 {
     ObjectClass *oc;
-    char *typename;
 
-    typename = g_strdup_printf(LOONGARCH_CPU_TYPE_NAME("%s"), cpu_model);
-    oc = object_class_by_name(typename);
-    g_free(typename);
-    return oc;
+    oc = object_class_by_name(cpu_model);
+    if (!oc) {
+        g_autofree char *typename 
+            = g_strdup_printf(LOONGARCH_CPU_TYPE_NAME("%s"), cpu_model);
+        oc = object_class_by_name(typename);
+        if (!oc) {
+            return NULL;
+        }
+    }
+
+    if (object_class_dynamic_cast(oc, TYPE_LOONGARCH_CPU)
+        && !object_class_is_abstract(oc)) {
+        return oc;
+    }
+    return NULL;
 }
 
 void loongarch_cpu_dump_state(CPUState *cs, FILE *f, int flags)