From 91af50bc097f60cecd36dcdd47193291ae8467c5 Mon Sep 17 00:00:00 2001
From: Sangmoon Kim <sangmoon.kim@samsung.com>
Date: Tue, 19 Jan 2021 21:23:13 +0900
Subject: [PATCH] ANDROID: arm64: add vendor hooks for kernel fault cases

Add hooks to gather data of kernel fault and summarize it with
other information.

Bug: 222638752
Bug: 375562078
Signed-off-by: Sangmoon Kim <sangmoon.kim@samsung.com>
Change-Id: I7d6a66837f2e896a413bd8d878f26928669d96e6
(cherry picked from commit 61d7b6c74146bc73ba1f316f8043ac1c0effb0e9)
---
 arch/arm64/mm/fault.c          |  3 +++
 drivers/android/vendor_hooks.c |  2 ++
 include/trace/hooks/fault.h    | 18 ++++++++++++++++++
 3 files changed, 23 insertions(+)
 create mode 100644 include/trace/hooks/fault.h

diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 8b281cf308b3..1ca51225f511 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -44,6 +44,8 @@
 #include <asm/tlbflush.h>
 #include <asm/traps.h>
 
+#include <trace/hooks/fault.h>
+
 struct fault_info {
 	int	(*fn)(unsigned long far, unsigned long esr,
 		      struct pt_regs *regs);
@@ -786,6 +788,7 @@ static int do_sea(unsigned long far, unsigned long esr, struct pt_regs *regs)
 		 */
 		siaddr  = untagged_addr(far);
 	}
+	trace_android_rvh_do_sea(siaddr, esr, regs);
 	arm64_notify_die(inf->name, regs, inf->sig, inf->code, siaddr, esr);
 
 	return 0;
diff --git a/drivers/android/vendor_hooks.c b/drivers/android/vendor_hooks.c
index a108d00a2035..3984d252fbfb 100644
--- a/drivers/android/vendor_hooks.c
+++ b/drivers/android/vendor_hooks.c
@@ -39,6 +39,7 @@
 #include <trace/hooks/ftrace_dump.h>
 #include <trace/hooks/mm.h>
 #include <trace/hooks/traps.h>
+#include <trace/hooks/fault.h>
 
 /*
  * Export tracepoints that act as a bare tracehook (ie: have no trace event
@@ -114,3 +115,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_look_around);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_look_around_migrate_folio);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_test_clear_look_around_ref);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_arm64_serror_panic);
+EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_do_sea);
diff --git a/include/trace/hooks/fault.h b/include/trace/hooks/fault.h
new file mode 100644
index 000000000000..e3d885d72eea
--- /dev/null
+++ b/include/trace/hooks/fault.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM fault
+#define TRACE_INCLUDE_PATH trace/hooks
+
+#if !defined(_TRACE_HOOK_FAULT_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_HOOK_FAULT_H
+
+#include <trace/hooks/vendor_hooks.h>
+
+struct pt_regs;
+DECLARE_RESTRICTED_HOOK(android_rvh_do_sea,
+	TP_PROTO(unsigned long addr, unsigned long esr, struct pt_regs *regs),
+	TP_ARGS(addr, esr, regs), 1);
+
+#endif /* _TRACE_HOOK_FAULT_H */
+/* This part must be outside protection */
+#include <trace/define_trace.h>