diff --git a/feed/kernel/tops/src/Makefile b/feed/kernel/tops/src/Makefile
index 929d902..2ad73cd 100644
--- a/feed/kernel/tops/src/Makefile
+++ b/feed/kernel/tops/src/Makefile
@@ -18,6 +18,7 @@
 tops-y += hwspinlock.o
 tops-y += mbox.o
 tops-y += mcu.o
+tops-y += misc.o
 tops-y += netsys.o
 tops-y += net-event.o
 tops-y += tops_params.o
diff --git a/feed/kernel/tops/src/inc/tops/mbox_id.h b/feed/kernel/tops/src/inc/tops/mbox_id.h
index 4ce3f6d..23a14ca 100644
--- a/feed/kernel/tops/src/inc/tops/mbox_id.h
+++ b/feed/kernel/tops/src/inc/tops/mbox_id.h
@@ -37,6 +37,7 @@
 	MBOX_AP2CX_CMD_NET = 1,
 	MBOX_AP2CX_CMD_WDT = 2,
 	MBOX_AP2CX_CMD_TRM = 3,
+	MBOX_AP2CX_CMD_MISC = 4,
 	__MBOX_AP2CX_CMD_MAX = 32,
 };
 
diff --git a/feed/kernel/tops/src/inc/tops/misc.h b/feed/kernel/tops/src/inc/tops/misc.h
new file mode 100644
index 0000000..ec1ba73
--- /dev/null
+++ b/feed/kernel/tops/src/inc/tops/misc.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (c) 2023 MediaTek Inc. All Rights Reserved.
+ *
+ * Author: Alvin Kuo <alvin.kuo@mediatek.com>
+ */
+
+#ifndef _TOPS_MISC_H_
+#define _TOPS_MISC_H_
+
+#include <linux/platform_device.h>
+
+enum misc_cmd_type {
+	MISC_CMD_TYPE_NULL,
+	MISC_CMD_TYPE_SET_PPE_NUM,
+
+	__MISC_CMD_TYPE_MAX,
+};
+
+int mtk_tops_misc_set_ppe_num(void);
+int mtk_tops_misc_init(struct platform_device *pdev);
+void mtk_tops_misc_deinit(struct platform_device *pdev);
+#endif /* _TOPS_MISC_H_ */
diff --git a/feed/kernel/tops/src/inc/tops/netsys.h b/feed/kernel/tops/src/inc/tops/netsys.h
index b319be4..fb68424 100644
--- a/feed/kernel/tops/src/inc/tops/netsys.h
+++ b/feed/kernel/tops/src/inc/tops/netsys.h
@@ -47,6 +47,7 @@
 #define TDMA_PORT_SHIFT				(0)
 #define TDMA_PORT_MASK				GENMASK(15, 0)
 
+u32 mtk_tops_netsys_ppe_get_num(void);
 u32 mtk_tops_netsys_ppe_get_max_entry_num(u32 ppe_id);
 int mtk_tops_netsys_init(struct platform_device *pdev);
 void mtk_tops_netsys_deinit(struct platform_device *pdev);
diff --git a/feed/kernel/tops/src/init.c b/feed/kernel/tops/src/init.c
index 9944ea2..4495dfb 100644
--- a/feed/kernel/tops/src/init.c
+++ b/feed/kernel/tops/src/init.c
@@ -23,6 +23,7 @@
 #include "tops/internal.h"
 #include "tops/mbox.h"
 #include "tops/mcu.h"
+#include "tops/misc.h"
 #include "tops/netsys.h"
 #include "tops/net-event.h"
 #include "tops/ser.h"
@@ -158,13 +159,20 @@
 		goto err_tdma_deinit;
 	}
 
-	ret = mtk_tops_post_init(pdev);
+	ret = mtk_tops_misc_init(pdev);
 	if (ret)
 		goto err_tnl_offload_deinit;
 
+	ret = mtk_tops_post_init(pdev);
+	if (ret)
+		goto err_misc_deinit;
+
 	TOPS_ERR("init done\n");
 	return ret;
 
+err_misc_deinit:
+	mtk_tops_misc_deinit(pdev);
+
 err_tnl_offload_deinit:
 	mtk_tops_tnl_offload_deinit(pdev);
 
@@ -196,6 +204,8 @@
 
 	mtk_tops_mcu_tear_down(pdev);
 
+	mtk_tops_misc_deinit(pdev);
+
 	mtk_tops_tnl_offload_deinit(pdev);
 
 	mtk_tops_tdma_deinit(pdev);
diff --git a/feed/kernel/tops/src/mcu.c b/feed/kernel/tops/src/mcu.c
index 6e8643a..2150c97 100644
--- a/feed/kernel/tops/src/mcu.c
+++ b/feed/kernel/tops/src/mcu.c
@@ -28,6 +28,7 @@
 #include "tops/internal.h"
 #include "tops/mbox.h"
 #include "tops/mcu.h"
+#include "tops/misc.h"
 #include "tops/netsys.h"
 #include "tops/tdma.h"
 #include "tops/trm.h"
@@ -572,6 +573,8 @@
 {
 	int ret;
 
+	mtk_tops_misc_set_ppe_num();
+
 	mtk_tops_tdma_enable();
 
 	mtk_tops_tnl_offload_recover();
diff --git a/feed/kernel/tops/src/misc.c b/feed/kernel/tops/src/misc.c
new file mode 100644
index 0000000..c61f647
--- /dev/null
+++ b/feed/kernel/tops/src/misc.c
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2023 MediaTek Inc. All Rights Reserved.
+ *
+ * Author: Alvin Kuo <alvin.kuo@mediatek.com>
+ */
+
+#include "tops/internal.h"
+#include "tops/misc.h"
+#include "tops/mbox.h"
+#include "tops/netsys.h"
+
+static struct mailbox_dev offload_send_mbox_dev[CORE_OFFLOAD_NUM] = {
+		[CORE_OFFLOAD_0] = MBOX_SEND_OFFLOAD_DEV(0, MISC),
+		[CORE_OFFLOAD_1] = MBOX_SEND_OFFLOAD_DEV(1, MISC),
+		[CORE_OFFLOAD_2] = MBOX_SEND_OFFLOAD_DEV(2, MISC),
+		[CORE_OFFLOAD_3] = MBOX_SEND_OFFLOAD_DEV(3, MISC),
+};
+
+int mtk_tops_misc_set_ppe_num(void)
+{
+	struct mailbox_msg msg = {
+		.msg1 = MISC_CMD_TYPE_SET_PPE_NUM,
+		.msg2 = mtk_tops_netsys_ppe_get_num(),
+	};
+	enum core_id core;
+	int ret;
+
+	for (core = CORE_OFFLOAD_0; core < CORE_OFFLOAD_NUM; core++) {
+		ret = mbox_send_msg_no_wait(&offload_send_mbox_dev[core], &msg);
+		/* TODO: error handle? */
+		if (ret)
+			TOPS_ERR("core offload%u set PPE num failed: %d\n",
+				 core, ret);
+	}
+
+	return ret;
+}
+
+int mtk_tops_misc_init(struct platform_device *pdev)
+{
+	enum core_id core;
+	int ret;
+
+	for (core = CORE_OFFLOAD_0; core < CORE_OFFLOAD_NUM; core++) {
+		ret = register_mbox_dev(MBOX_SEND, &offload_send_mbox_dev[core]);
+		if (ret)
+			goto err_out;
+	}
+
+	return ret;
+
+err_out:
+	for (; core > 0; core--)
+		unregister_mbox_dev(MBOX_SEND, &offload_send_mbox_dev[core - 1]);
+
+	return ret;
+}
+
+void mtk_tops_misc_deinit(struct platform_device *pdev)
+{
+	enum core_id core;
+
+	for (core = CORE_OFFLOAD_0; core < CORE_OFFLOAD_NUM; core++)
+		unregister_mbox_dev(MBOX_SEND, &offload_send_mbox_dev[core]);
+}
diff --git a/feed/kernel/tops/src/netsys.c b/feed/kernel/tops/src/netsys.c
index 50513d8..e1770c9 100644
--- a/feed/kernel/tops/src/netsys.c
+++ b/feed/kernel/tops/src/netsys.c
@@ -32,6 +32,7 @@
 
 struct netsys_hw {
 	void __iomem *base;
+	u32 ppe_num;
 };
 
 static struct netsys_hw netsys;
@@ -111,6 +112,11 @@
 	return 0;
 }
 
+u32 mtk_tops_netsys_ppe_get_num(void)
+{
+	return netsys.ppe_num;
+}
+
 u32 mtk_tops_netsys_ppe_get_max_entry_num(u32 ppe_id)
 {
 	u32 tbl_entry_num;
@@ -132,7 +138,7 @@
 	return PPE_DEFAULT_ENTRY_SIZE << tbl_entry_num;
 }
 
-int mtk_tops_netsys_init(struct platform_device *pdev)
+static int mtk_tops_netsys_base_init(struct platform_device *pdev)
 {
 	struct device_node *fe_mem = NULL;
 	struct resource res;
@@ -144,12 +150,57 @@
 		return -ENODEV;
 	}
 
-	if (of_address_to_resource(fe_mem, 0, &res))
-		return -ENXIO;
+	if (of_address_to_resource(fe_mem, 0, &res)) {
+		ret = -ENXIO;
+		goto out;
+	}
 
 	netsys.base = devm_ioremap(&pdev->dev, res.start, resource_size(&res));
-	if (!netsys.base)
-		return -ENOMEM;
+	if (!netsys.base) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+out:
+	of_node_put(fe_mem);
+
+	return ret;
+}
+
+static int mtk_tops_netsys_ppe_num_init(struct platform_device *pdev)
+{
+	struct device_node *hnat = NULL;
+	u32 val = 0;
+	int ret = 0;
+
+	hnat = of_parse_phandle(pdev->dev.of_node, "hnat", 0);
+	if (!hnat) {
+		TOPS_ERR("can not find hnat node\n");
+		return -ENODEV;
+	}
+
+	ret = of_property_read_u32(hnat, "mtketh-ppe-num", &val);
+	if (ret)
+		netsys.ppe_num = 1;
+	else
+		netsys.ppe_num = val;
+
+	of_node_put(hnat);
+
+	return 0;
+}
+
+int mtk_tops_netsys_init(struct platform_device *pdev)
+{
+	int ret;
+
+	ret = mtk_tops_netsys_base_init(pdev);
+	if (ret)
+		return ret;
+
+	ret = mtk_tops_netsys_ppe_num_init(pdev);
+	if (ret)
+		return ret;
 
 	ret = mtk_trm_hw_config_register(TRM_NETSYS, &netsys_trm_hw_cfg);
 	if (ret)
diff --git a/feed/kernel/tops/src/protocol/tunnel/gre/gretap.c b/feed/kernel/tops/src/protocol/tunnel/gre/gretap.c
index 584367f..576d15c 100644
--- a/feed/kernel/tops/src/protocol/tunnel/gre/gretap.c
+++ b/feed/kernel/tops/src/protocol/tunnel/gre/gretap.c
@@ -12,13 +12,26 @@
 #include <pce/pce.h>
 
 #include "tops/internal.h"
+#include "tops/netsys.h"
 #include "tops/protocol/tunnel/gre/gretap.h"
 #include "tops/tunnel.h"
 
 static int gretap_cls_entry_setup(struct tops_tnl_info *tnl_info,
 				  struct cls_desc *cdesc)
 {
-	CLS_DESC_DATA(cdesc, fport, PSE_PORT_PPE0);
+	/*
+	 * If the system only has 1 PPE,
+	 * packets from any GDM will default forward to PPE0 first
+	 * If the system has 3 PPE,
+	 * packets from GDM1 will forward to PPE0
+	 * packets from GDM2 will forward to PPE1
+	 * packets from GDM3 will forward to PPE2
+	 */
+	if (mtk_tops_netsys_ppe_get_num() == 1)
+		CLS_DESC_DATA(cdesc, fport, PSE_PORT_PPE0);
+	else
+		CLS_DESC_DATA(cdesc, fport, PSE_PORT_PPE1);
+
 	CLS_DESC_DATA(cdesc, tport_idx, 0x4);
 	CLS_DESC_MASK_DATA(cdesc, tag, CLS_DESC_TAG_MASK, CLS_DESC_TAG_MATCH_L4_HDR);
 	CLS_DESC_MASK_DATA(cdesc, dip_match, CLS_DESC_DIP_MATCH, CLS_DESC_DIP_MATCH);
diff --git a/feed/kernel/tops/src/protocol/tunnel/l2tp/l2tpv2.c b/feed/kernel/tops/src/protocol/tunnel/l2tp/l2tpv2.c
index ac5a929..a066202 100644
--- a/feed/kernel/tops/src/protocol/tunnel/l2tp/l2tpv2.c
+++ b/feed/kernel/tops/src/protocol/tunnel/l2tp/l2tpv2.c
@@ -17,6 +17,7 @@
 #include <pce/pce.h>
 
 #include "tops/internal.h"
+#include "tops/netsys.h"
 #include "tops/protocol/mac/ppp.h"
 #include "tops/protocol/transport/udp.h"
 #include "tops/protocol/tunnel/l2tp/l2tpv2.h"
@@ -25,7 +26,19 @@
 static int l2tpv2_cls_entry_setup(struct tops_tnl_info *tnl_info,
 				  struct cls_desc *cdesc)
 {
-	CLS_DESC_DATA(cdesc, fport, PSE_PORT_PPE0);
+	/*
+	 * If the system only has 1 PPE,
+	 * packets from any GDM will default forward to PPE0 first
+	 * If the system has 3 PPE,
+	 * packets from GDM1 will forward to PPE0
+	 * packets from GDM2 will forward to PPE1
+	 * packets from GDM3 will forward to PPE2
+	 */
+	if (mtk_tops_netsys_ppe_get_num() == 1)
+		CLS_DESC_DATA(cdesc, fport, PSE_PORT_PPE0);
+	else
+		CLS_DESC_DATA(cdesc, fport, PSE_PORT_PPE1);
+
 	CLS_DESC_DATA(cdesc, tport_idx, 0x4);
 	CLS_DESC_MASK_DATA(cdesc, tag, CLS_DESC_TAG_MASK, CLS_DESC_TAG_MATCH_L4_USR);
 	CLS_DESC_MASK_DATA(cdesc, dip_match, CLS_DESC_DIP_MATCH, CLS_DESC_DIP_MATCH);
diff --git a/feed/kernel/tops/src/protocol/tunnel/pptp/pptp.c b/feed/kernel/tops/src/protocol/tunnel/pptp/pptp.c
index 8bc46fe..098852f 100644
--- a/feed/kernel/tops/src/protocol/tunnel/pptp/pptp.c
+++ b/feed/kernel/tops/src/protocol/tunnel/pptp/pptp.c
@@ -16,6 +16,7 @@
 #include <pce/netsys.h>
 #include <pce/pce.h>
 
+#include "tops/netsys.h"
 #include "tops/protocol/mac/ppp.h"
 #include "tops/protocol/tunnel/pptp/pptp.h"
 #include "tops/seq_gen.h"
@@ -24,7 +25,19 @@
 static int pptp_cls_entry_setup(struct tops_tnl_info *tnl_info,
 				struct cls_desc *cdesc)
 {
-	CLS_DESC_DATA(cdesc, fport, PSE_PORT_PPE0);
+	/*
+	 * If the system only has 1 PPE,
+	 * packets from any GDM will default forward to PPE0 first
+	 * If the system has 3 PPE,
+	 * packets from GDM1 will forward to PPE0
+	 * packets from GDM2 will forward to PPE1
+	 * packets from GDM3 will forward to PPE2
+	 */
+	if (mtk_tops_netsys_ppe_get_num() == 1)
+		CLS_DESC_DATA(cdesc, fport, PSE_PORT_PPE0);
+	else
+		CLS_DESC_DATA(cdesc, fport, PSE_PORT_PPE1);
+
 	CLS_DESC_DATA(cdesc, tport_idx, 0x4);
 	CLS_DESC_MASK_DATA(cdesc, tag, CLS_DESC_TAG_MASK, CLS_DESC_TAG_MATCH_L4_HDR);
 	CLS_DESC_MASK_DATA(cdesc, dip_match, CLS_DESC_DIP_MATCH, CLS_DESC_DIP_MATCH);