linux-kernel - [PATCH 06/10] x86/tracing: Move page fault trace points to generic

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Message-Id: <7d32e5069e57ec61b0da2f8b31be28a7819457bb.1741708239.git.namcao@linutronix.de>
Date: Tue, 11 Mar 2025 18:05:07 +0100
From: Nam Cao <namcao@...utronix.de>
To: Steven Rostedt <rostedt@...dmis.org>,
	Gabriele Monaco <gmonaco@...hat.com>,
	john.ogness@...utronix.de,
	linux-trace-kernel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Nam Cao <namcao@...utronix.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Andy Lutomirski <luto@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH 06/10] x86/tracing: Move page fault trace points to generic

Page fault trace points are interesting for other architectures as well.
Move them to be generic.

Signed-off-by: Nam Cao <namcao@...utronix.de>
---
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: x86@...nel.org
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
---
 arch/x86/mm/fault.c                                 |  2 +-
 .../asm/trace => include/trace/events}/exceptions.h | 13 ++++---------
 2 files changed, 5 insertions(+), 10 deletions(-)
 rename {arch/x86/include/asm/trace => include/trace/events}/exceptions.h (79%)

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 7e3e51fa1f95..ad4cb1502316 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -38,7 +38,7 @@
 #include <asm/sev.h>			/* snp_dump_hva_rmpentry()	*/
 
 #define CREATE_TRACE_POINTS
-#include <asm/trace/exceptions.h>
+#include <trace/events/exceptions.h>
 
 /*
  * Returns 0 if mmiotrace is disabled, or if the fault is not
diff --git a/arch/x86/include/asm/trace/exceptions.h b/include/trace/events/exceptions.h
similarity index 79%
rename from arch/x86/include/asm/trace/exceptions.h
rename to include/trace/events/exceptions.h
index 34bc8214a2d7..a631f8de8917 100644
--- a/arch/x86/include/asm/trace/exceptions.h
+++ b/include/trace/events/exceptions.h
@@ -7,7 +7,7 @@
 
 #include <linux/tracepoint.h>
 
-DECLARE_EVENT_CLASS(x86_exceptions,
+DECLARE_EVENT_CLASS(exceptions,
 
 	TP_PROTO(unsigned long address, struct pt_regs *regs,
 		 unsigned long error_code),
@@ -22,7 +22,7 @@ DECLARE_EVENT_CLASS(x86_exceptions,
 
 	TP_fast_assign(
 		__entry->address = address;
-		__entry->ip = regs->ip;
+		__entry->ip = instruction_pointer(regs);
 		__entry->error_code = error_code;
 	),
 
@@ -30,18 +30,13 @@ DECLARE_EVENT_CLASS(x86_exceptions,
 		  (void *)__entry->address, (void *)__entry->ip,
 		  __entry->error_code) );
 
-DEFINE_EVENT(x86_exceptions, page_fault_user,
+DEFINE_EVENT(exceptions, page_fault_user,
 	TP_PROTO(unsigned long address,	struct pt_regs *regs, unsigned long error_code),
 	TP_ARGS(address, regs, error_code));
-
-DEFINE_EVENT(x86_exceptions, page_fault_kernel,
+DEFINE_EVENT(exceptions, page_fault_kernel,
 	TP_PROTO(unsigned long address,	struct pt_regs *regs, unsigned long error_code),
 	TP_ARGS(address, regs, error_code));
 
-#undef TRACE_INCLUDE_PATH
-#undef TRACE_INCLUDE_FILE
-#define TRACE_INCLUDE_PATH .
-#define TRACE_INCLUDE_FILE exceptions
 #endif /*  _TRACE_PAGE_FAULT_H */
 
 /* This part must be outside protection */
-- 
2.39.5