ANDROID: vendor_hooks: add hook to record reboot reason

Add hook to record the reason for calling hw_protection_shutdown

Bug: 334006616
Change-Id: I9dce8056693c96f1d5f1fab9af02a2e68ed6ab91
Signed-off-by: Dezhi Huang <huangdezhi@hihonor.com>
(cherry picked from commit 70e95a10a553c0c530694b8939d25fbb984647d0)

drivers/android/vendor_hooks.c

@@ -37,6 +37,7 @@
 #include <trace/hooks/gic.h>
 #include <trace/hooks/gic_v3.h>
 #include <trace/hooks/remoteproc.h>
+#include <trace/hooks/reboot.h>
 #include <trace/hooks/psci.h>
 #include <trace/hooks/timer.h>
 #include <trace/hooks/fpsimd.h>
@@ -130,6 +131,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_set_balance_anon_file_reclaim);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_show_max_freq);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_slab_alloc_node);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_slab_free);
+EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_hw_protection_shutdown);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_selinux_avc_insert);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_selinux_avc_node_delete);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_selinux_avc_node_replace);

include/trace/hooks/reboot.h

@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM reboot
+
+#define TRACE_INCLUDE_PATH trace/hooks
+
+#if !defined(_TRACE_HOOK_REBOOT_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_HOOK_REBOOT_H
+
+#include <trace/hooks/vendor_hooks.h>
+
+DECLARE_RESTRICTED_HOOK(android_rvh_hw_protection_shutdown,
+	TP_PROTO(const char *reason),
+	TP_ARGS(reason), 1);
+
+#endif /* _TRACE_HOOK_REBOOT_H */
+/* This part must be outside protection */
+#include <trace/define_trace.h>

kernel/reboot.c

@@ -19,6 +19,8 @@
 #include <linux/syscore_ops.h>
 #include <linux/uaccess.h>
 
+#include <trace/hooks/reboot.h>
+
 /*
  * this indicates whether you can reboot with ctrl-alt-del: the default is yes
  */
@@ -998,6 +1000,8 @@ void __hw_protection_shutdown(const char *reason, int ms_until_forced, bool shut
 	if (!atomic_dec_and_test(&allow_proceed))
 		return;
 
+	trace_android_rvh_hw_protection_shutdown(reason);
+
 	/*
 	 * Queue a backup emergency shutdown in the event of
 	 * orderly_poweroff failure