--- zzzz-none-000/linux-4.9.276/net/ipv4/ip_gre.c	2021-07-20 14:21:16.000000000 +0000
+++ falcon-5530-750/linux-4.9.276/net/ipv4/ip_gre.c	2023-04-05 08:19:02.000000000 +0000
@@ -1185,6 +1185,20 @@
 	.size = sizeof(struct ip_tunnel_net),
 };
 
+#if IS_ENABLED(CONFIG_PPA)
+extern uint32_t (*ppa_is_ipv4_gretap_fn)(struct net_device *dev);
+
+static u32 ppa_is_ipv4_gretap(struct net_device *dev)
+{
+	/* NOTE:
+	 * To include acelerated counters in gre_tap net_device stats,
+	 * gre_tap netdev_ops pointer (i.e., @gre_tap_netdev_ops) can be modified with a new one.
+	 * This is specifically to overload @ndo_get_stats64, but @ndo_init remains unchanged.
+	 */
+	return (dev && dev->netdev_ops && (dev->netdev_ops->ndo_init == gre_tap_netdev_ops.ndo_init));
+}
+#endif
+
 static int __init ipgre_init(void)
 {
 	int err;
@@ -1213,6 +1227,10 @@
 	if (err < 0)
 		goto tap_ops_failed;
 
+#if IS_ENABLED(CONFIG_PPA)
+	ppa_is_ipv4_gretap_fn = ppa_is_ipv4_gretap;
+#endif
+
 	return 0;
 
 tap_ops_failed:
@@ -1228,6 +1246,9 @@
 
 static void __exit ipgre_fini(void)
 {
+#if IS_ENABLED(CONFIG_PPA)
+	ppa_is_ipv4_gretap_fn = NULL;
+#endif
 	rtnl_link_unregister(&ipgre_tap_ops);
 	rtnl_link_unregister(&ipgre_link_ops);
 	gre_del_protocol(&ipgre_protocol, GREPROTO_CISCO);