diff --git a/hw/intc/loongarch_extioi.c b/hw/intc/loongarch_extioi.c
index f17ff39254..a6f489b885 100644
--- a/hw/intc/loongarch_extioi.c
+++ b/hw/intc/loongarch_extioi.c
@@ -323,16 +323,8 @@ static const MemoryRegionOps extioi_virt_ops = {
     .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
-static void loongarch_extioi_common_realize(DeviceState *dev, Error **errp)
-{
-    LoongArchExtIOICommonState *s = (LoongArchExtIOICommonState *)dev;
-    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
-
-    if (s->num_cpu == 0) {
-        error_setg(errp, "num-cpu must be at least 1");
-        return;
-    }
-}
+static int vmstate_extioi_post_load(void *opaque, int version_id);
+#include "loongarch_extioi_common.c"
 
 static void loongarch_extioi_realize(DeviceState *dev, Error **errp)
 {
@@ -409,54 +401,6 @@ static int vmstate_extioi_post_load(void *opaque, int version_id)
     return 0;
 }
 
-static int loongarch_extioi_common_post_load(void *opaque, int version_id)
-{
-    return vmstate_extioi_post_load(opaque, version_id);
-}
-
-static const VMStateDescription vmstate_extioi_core = {
-    .name = "extioi-core",
-    .version_id = 1,
-    .minimum_version_id = 1,
-    .fields = (const VMStateField[]) {
-        VMSTATE_UINT32_ARRAY(coreisr, ExtIOICore, EXTIOI_IRQS_GROUP_COUNT),
-        VMSTATE_END_OF_LIST()
-    }
-};
-
-static const VMStateDescription vmstate_loongarch_extioi = {
-    .name = "loongarch.extioi",
-    .version_id = 3,
-    .minimum_version_id = 3,
-    .post_load = loongarch_extioi_common_post_load,
-    .fields = (const VMStateField[]) {
-        VMSTATE_UINT32_ARRAY(bounce, LoongArchExtIOICommonState,
-                             EXTIOI_IRQS_GROUP_COUNT),
-        VMSTATE_UINT32_ARRAY(nodetype, LoongArchExtIOICommonState,
-                             EXTIOI_IRQS_NODETYPE_COUNT / 2),
-        VMSTATE_UINT32_ARRAY(enable, LoongArchExtIOICommonState,
-                             EXTIOI_IRQS / 32),
-        VMSTATE_UINT32_ARRAY(isr, LoongArchExtIOICommonState,
-                             EXTIOI_IRQS / 32),
-        VMSTATE_UINT32_ARRAY(ipmap, LoongArchExtIOICommonState,
-                             EXTIOI_IRQS_IPMAP_SIZE / 4),
-        VMSTATE_UINT32_ARRAY(coremap, LoongArchExtIOICommonState,
-                             EXTIOI_IRQS / 4),
-        VMSTATE_STRUCT_VARRAY_POINTER_UINT32(cpu, LoongArchExtIOICommonState,
-                             num_cpu, vmstate_extioi_core, ExtIOICore),
-        VMSTATE_UINT32(features, LoongArchExtIOICommonState),
-        VMSTATE_UINT32(status, LoongArchExtIOICommonState),
-        VMSTATE_END_OF_LIST()
-    }
-};
-
-static Property extioi_properties[] = {
-    DEFINE_PROP_UINT32("num-cpu", LoongArchExtIOICommonState, num_cpu, 1),
-    DEFINE_PROP_BIT("has-virtualization-extension", LoongArchExtIOICommonState,
-                    features, EXTIOI_HAS_VIRT_EXTENSION, 0),
-    DEFINE_PROP_END_OF_LIST(),
-};
-
 static void loongarch_extioi_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/hw/intc/loongarch_extioi_common.c b/hw/intc/loongarch_extioi_common.c
new file mode 100644
index 0000000000..13f02fc5ab
--- /dev/null
+++ b/hw/intc/loongarch_extioi_common.c
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Loongson extioi interrupt controller emulation
+ * Copyright (C) 2024 Loongson Technology Corporation Limited
+ */
+
+static void loongarch_extioi_common_realize(DeviceState *dev, Error **errp)
+{
+    LoongArchExtIOICommonState *s = (LoongArchExtIOICommonState *)dev;
+
+    if (s->num_cpu == 0) {
+        error_setg(errp, "num-cpu must be at least 1");
+        return;
+    }
+}
+
+static int loongarch_extioi_common_post_load(void *opaque, int version_id)
+{
+    return vmstate_extioi_post_load(opaque, version_id);
+}
+
+static const VMStateDescription vmstate_extioi_core = {
+    .name = "extioi-core",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (const VMStateField[]) {
+        VMSTATE_UINT32_ARRAY(coreisr, ExtIOICore, EXTIOI_IRQS_GROUP_COUNT),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static const VMStateDescription vmstate_loongarch_extioi = {
+    .name = "loongarch.extioi",
+    .version_id = 3,
+    .minimum_version_id = 3,
+    .post_load = loongarch_extioi_common_post_load,
+    .fields = (const VMStateField[]) {
+        VMSTATE_UINT32_ARRAY(bounce, LoongArchExtIOICommonState,
+                             EXTIOI_IRQS_GROUP_COUNT),
+        VMSTATE_UINT32_ARRAY(nodetype, LoongArchExtIOICommonState,
+                             EXTIOI_IRQS_NODETYPE_COUNT / 2),
+        VMSTATE_UINT32_ARRAY(enable, LoongArchExtIOICommonState,
+                             EXTIOI_IRQS / 32),
+        VMSTATE_UINT32_ARRAY(isr, LoongArchExtIOICommonState,
+                             EXTIOI_IRQS / 32),
+        VMSTATE_UINT32_ARRAY(ipmap, LoongArchExtIOICommonState,
+                             EXTIOI_IRQS_IPMAP_SIZE / 4),
+        VMSTATE_UINT32_ARRAY(coremap, LoongArchExtIOICommonState,
+                             EXTIOI_IRQS / 4),
+        VMSTATE_STRUCT_VARRAY_POINTER_UINT32(cpu, LoongArchExtIOICommonState,
+                             num_cpu, vmstate_extioi_core, ExtIOICore),
+        VMSTATE_UINT32(features, LoongArchExtIOICommonState),
+        VMSTATE_UINT32(status, LoongArchExtIOICommonState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static Property extioi_properties[] = {
+    DEFINE_PROP_UINT32("num-cpu", LoongArchExtIOICommonState, num_cpu, 1),
+    DEFINE_PROP_BIT("has-virtualization-extension", LoongArchExtIOICommonState,
+                    features, EXTIOI_HAS_VIRT_EXTENSION, 0),
+    DEFINE_PROP_END_OF_LIST(),
+};
