--- zzzz-none-000/linux-5.15.111/net/ipv4/ip_input.c	2023-05-11 14:00:40.000000000 +0000
+++ puma7-atom-6670-761/linux-5.15.111/net/ipv4/ip_input.c	2024-02-07 10:23:30.000000000 +0000
@@ -105,6 +105,10 @@
  *		output should probably do its own fragmentation at the UDP/RAW layer. TCP shouldn't cause
  *		fragmentation anyway.
  */
+ /*
+ * Includes Intel Corporation's changes/modifications dated: 2018.
+ * Changed/modified portions - Copyright 2018, Intel Corporation.
+ */
 
 #define pr_fmt(fmt) "IPv4: " fmt
 
@@ -142,6 +146,12 @@
 #include <linux/netlink.h>
 #include <net/dst_metadata.h>
 
+#include <avm/pa/avm_pa.h>
+
+#ifdef CONFIG_TI_PACKET_PROCESSOR
+#include <linux/ti_hil.h>
+#endif
+
 /*
  *	Process Router Attention IP option (RFC 2113)
  */
@@ -223,7 +233,7 @@
 	}
 }
 
-static int ip_local_deliver_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
+int ip_local_deliver_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
 {
 	__skb_pull(skb, skb_network_header_len(skb));
 
@@ -233,6 +243,7 @@
 
 	return 0;
 }
+EXPORT_SYMBOL(ip_local_deliver_finish);
 
 /*
  * 	Deliver IP Packets to the higher protocol layers.
@@ -253,7 +264,6 @@
 		       net, NULL, skb, skb->dev, NULL,
 		       ip_local_deliver_finish);
 }
-EXPORT_SYMBOL(ip_local_deliver);
 
 static inline bool ip_rcv_options(struct sk_buff *skb, struct net_device *dev)
 {
@@ -419,6 +429,11 @@
 	return NET_RX_SUCCESS;
 
 drop:
+
+#if defined(CONFIG_APPCPU_GW_PP_HANDLE) || defined(CONFIG_TI_PACKET_PROCESSOR)
+    /* Create a NULL PP device, to drop all dropped packets before they reach the host */
+    ti_hil_pp_event (TI_IP_DISCARD_PKT_IPV4, (void *)skb);
+#endif
 	kfree_skb_reason(skb, drop_reason);
 	return NET_RX_DROP;
 
@@ -669,3 +684,43 @@
 	if (!list_empty(&sublist))
 		ip_sublist_rcv(&sublist, curr_dev, curr_net);
 }
+
+static void ip_avm_pa_transmit(void *arg, struct sk_buff *skb)
+{
+	/* We can safely pass NULL as sk parameter, it is just required
+	 * to be a valid netfilter hook. The initiator, ip_local_deliver()
+	 * passes a NULL sock because it doesn't even know the socket yet.
+	 */
+	ip_local_deliver_finish((struct net *) arg, NULL, skb);
+}
+
+static void __init ip_avm_pa_register(void)
+{
+	struct avm_pa_dev_info *ip_dev = AVM_PA_NET_IP_DEVINFO(&init_net);
+	struct avm_pa_pid_cfg cfg = {0};
+	struct avm_pa_pid_ecfg ecfg = { 0 };
+
+	if (!ip_dev)
+		return;
+
+	strlcpy(cfg.name, "ipv4", sizeof(cfg.name));
+	cfg.framing = avm_pa_framing_ipdev;
+	cfg.default_mtu = 0xffff;
+	cfg.tx_func = ip_avm_pa_transmit;
+	cfg.tx_arg = &init_net;
+
+	if (avm_pa_dev_pid_register(ip_dev, &cfg) < 0) {
+		pr_err("failed to register avm_pa pid %s\n", cfg.name);
+		return;
+	}
+
+	ecfg.version = AVM_PA_PID_ECFG_VERSION;
+	ecfg.cb_start = 0;
+	ecfg.cb_len = sizeof(struct inet_skb_parm);
+	avm_pa_pid_set_ecfg(ip_dev->pid_handle, &ecfg);
+}
+
+void __init ip_input_init(void)
+{
+	ip_avm_pa_register();
+}