--- zzzz-none-000/linux-4.9.279/net/ipv4/fib_trie.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-arm-6591-750/linux-4.9.279/net/ipv4/fib_trie.c	2023-02-08 10:58:16.000000000 +0000
@@ -47,6 +47,10 @@
  *		Paul E. McKenney <paulmck@us.ibm.com>
  *		Patrick McHardy <kaber@trash.net>
  */
+/*
+Includes Intel Corporation's changes/modifications dated: 2014.
+Changed/modified portions - Copyright © 2014, Intel Corporation.
+*/
 
 #define VERSION "0.409"
 
@@ -82,6 +86,7 @@
 #include <net/sock.h>
 #include <net/ip_fib.h>
 #include <trace/events/fib.h>
+#include <linux/ti_hil.h>
 #include "fib_lookup.h"
 
 static BLOCKING_NOTIFIER_HEAD(fib_chain);
@@ -1264,6 +1269,13 @@
 	rt_cache_flush(cfg->fc_nlinfo.nl_net);
 	call_fib_entry_notifiers(net, FIB_EVENT_ENTRY_ADD, key, plen, fi, tos,
 				 cfg->fc_type, tb->tb_id, cfg->fc_nlflags);
+#ifdef CONFIG_TI_PACKET_PROCESSOR   
+    /* Send an event to HIL in PP indicating that a new route is being added. 
+     * The HIL will take the appropriate action, i.e. either selectively flush 
+     * the sessions that are affected by this route addition or just flush all
+     *  sessions to be coherent with the updated routing table. */
+    ti_hil_pp_event(TI_ROUTE_ADDED, (void *)new_fa);
+#endif //CONFIG_TI_PACKET_PROCESSOR
 	rtmsg_fib(RTM_NEWROUTE, htonl(key), new_fa, plen, new_fa->tb_id,
 		  &cfg->fc_nlinfo, nlflags);
 succeeded:
@@ -1566,6 +1578,13 @@
 	call_fib_entry_notifiers(net, FIB_EVENT_ENTRY_DEL, key, plen,
 				 fa_to_delete->fa_info, tos, cfg->fc_type,
 				 tb->tb_id, 0);
+#ifdef CONFIG_TI_PACKET_PROCESSOR
+    /* Send an event to the HIL Packet Processor indicating
+     * that this route is being deleted. The HIL will take
+     * the appropriate action - selectively flush its sessions
+     * which could be affected by this route / flush all sessions */
+    ti_hil_pp_event(TI_ROUTE_DELETED, (void *)fa);
+#endif // CONFIG_TI_PACKET_PROCESSOR	
 	rtmsg_fib(RTM_DELROUTE, htonl(key), fa_to_delete, plen, tb->tb_id,
 		  &cfg->fc_nlinfo, 0);