--- zzzz-none-000/linux-5.15.111/net/ipv4/route.c	2023-05-11 14:00:40.000000000 +0000
+++ puma7-atom-6670-761/linux-5.15.111/net/ipv4/route.c	2024-02-07 10:23:30.000000000 +0000
@@ -57,6 +57,10 @@
  *	Ilia Sotnikov		:	Ignore TOS on PMTUD and Redirect
  *	Ilia Sotnikov		:	Removed TOS from hash calculations
  */
+ /*
+ * Includes Intel Corporation's changes/modifications dated: 2018.
+ * Changed/modified portions - Copyright 2018, Intel Corporation.
+ */
 
 #define pr_fmt(fmt) "IPv4: " fmt
 
@@ -110,6 +114,9 @@
 #include <net/secure_seq.h>
 #include <net/ip_tunnels.h>
 #include <net/l3mdev.h>
+#ifdef CONFIG_TI_PACKET_PROCESSOR
+#include <linux/ti_hil.h>
+#endif
 
 #include "fib_lookup.h"
 
@@ -1327,7 +1334,26 @@
 
 INDIRECT_CALLABLE_SCOPE unsigned int ipv4_mtu(const struct dst_entry *dst)
 {
-	return ip_dst_mtu_maybe_forward(dst, false);
+	const struct rtable *rt = (const struct rtable *)dst;
+	unsigned int mtu = rt->rt_pmtu;
+
+	if (!mtu || time_after_eq(jiffies, rt->dst.expires))
+		mtu = dst_metric_raw(dst, RTAX_MTU);
+
+	if (mtu)
+		goto out;
+
+	mtu = READ_ONCE(dst->dev->mtu);
+
+	if (unlikely(ip_mtu_locked(dst))) {
+		if (rt->rt_uses_gateway && mtu > 576)
+			mtu = 576;
+	}
+
+out:
+	mtu = min_t(unsigned int, mtu, IP_MAX_MTU);
+
+	return mtu - lwtunnel_headroom(dst->lwtstate, mtu);
 }
 EXPORT_INDIRECT_CALLABLE(ipv4_mtu);
 
@@ -1772,6 +1798,10 @@
 				     __be32 saddr)
 {
 	RT_CACHE_STAT_INC(in_martian_src);
+#ifdef CONFIG_TI_PACKET_PROCESSOR
+    /* Create a NULL PP device to drop all dropped martian packets before they reach the host */
+    ti_hil_pp_event (IP_DISCARD_MARTIAN_PKT_IPV4, (void *)skb);
+#endif //CONFIG_TI_PACKET_PROCESSOR
 #ifdef CONFIG_IP_ROUTE_VERBOSE
 	if (IN_DEV_LOG_MARTIANS(in_dev) && net_ratelimit()) {
 		/*
@@ -2420,6 +2450,10 @@
 	 */
 martian_destination:
 	RT_CACHE_STAT_INC(in_martian_dst);
+#ifdef CONFIG_TI_PACKET_PROCESSOR
+    /* Create a NULL PP device, to drop all dropped martian dst packets before they reach the host */
+    ti_hil_pp_event (IP_DISCARD_MARTIAN_PKT_IPV4, (void *)skb);
+#endif //CONFIG_TI_PACKET_PROCESSOR
 #ifdef CONFIG_IP_ROUTE_VERBOSE
 	if (IN_DEV_LOG_MARTIANS(in_dev))
 		net_warn_ratelimited("martian destination %pI4 from %pI4, dev %s\n",