From: Nam Cao <namcao@linutronix.de>
Date: Mon, 12 May 2025 10:50:59 +0000 (+0200)
Subject: x86/tracing, x86/mm: Move page fault tracepoints to generic
X-Git-Tag: ceph-for-6.17-rc6~806^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=06aa9378df017ea7482b1bfdcd750104c8b3c407;p=ceph-client.git

x86/tracing, x86/mm: Move page fault tracepoints to generic

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

Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Gabriele Monaco <gmonaco@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-trace-kernel@vger.kernel.org
Link: https://lore.kernel.org/r/89c2f284adf9b4c933f0e65811c50cef900a5a95.1747046848.git.namcao@linutronix.de
---

diff --git a/arch/x86/include/asm/trace/exceptions.h b/arch/x86/include/asm/trace/exceptions.h
deleted file mode 100644
index 34bc8214a2d7..000000000000
--- a/arch/x86/include/asm/trace/exceptions.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#undef TRACE_SYSTEM
-#define TRACE_SYSTEM exceptions
-
-#if !defined(_TRACE_PAGE_FAULT_H) || defined(TRACE_HEADER_MULTI_READ)
-#define _TRACE_PAGE_FAULT_H
-
-#include <linux/tracepoint.h>
-
-DECLARE_EVENT_CLASS(x86_exceptions,
-
-	TP_PROTO(unsigned long address, struct pt_regs *regs,
-		 unsigned long error_code),
-
-	TP_ARGS(address, regs, error_code),
-
-	TP_STRUCT__entry(
-		__field(		unsigned long, address	)
-		__field(		unsigned long, ip	)
-		__field(		unsigned long, error_code )
-	),
-
-	TP_fast_assign(
-		__entry->address = address;
-		__entry->ip = regs->ip;
-		__entry->error_code = error_code;
-	),
-
-	TP_printk("address=%ps ip=%ps error_code=0x%lx",
-		  (void *)__entry->address, (void *)__entry->ip,
-		  __entry->error_code) );
-
-DEFINE_EVENT(x86_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,
-	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 */
-#include <trace/define_trace.h>
diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
index 32035d5be5a0..629a8bf12219 100644
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@@ -34,8 +34,6 @@ obj-y				+= pat/
 CFLAGS_physaddr.o		:= -fno-stack-protector
 CFLAGS_mem_encrypt_identity.o	:= -fno-stack-protector
 
-CFLAGS_fault.o := -I $(src)/../include/asm/trace
-
 obj-$(CONFIG_X86_32)		+= pgtable_32.o iomap_32.o
 
 obj-$(CONFIG_HUGETLB_PAGE)	+= hugetlbpage.o
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/include/trace/events/exceptions.h b/include/trace/events/exceptions.h
new file mode 100644
index 000000000000..a631f8de8917
--- /dev/null
+++ b/include/trace/events/exceptions.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM exceptions
+
+#if !defined(_TRACE_PAGE_FAULT_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_PAGE_FAULT_H
+
+#include <linux/tracepoint.h>
+
+DECLARE_EVENT_CLASS(exceptions,
+
+	TP_PROTO(unsigned long address, struct pt_regs *regs,
+		 unsigned long error_code),
+
+	TP_ARGS(address, regs, error_code),
+
+	TP_STRUCT__entry(
+		__field(		unsigned long, address	)
+		__field(		unsigned long, ip	)
+		__field(		unsigned long, error_code )
+	),
+
+	TP_fast_assign(
+		__entry->address = address;
+		__entry->ip = instruction_pointer(regs);
+		__entry->error_code = error_code;
+	),
+
+	TP_printk("address=%ps ip=%ps error_code=0x%lx",
+		  (void *)__entry->address, (void *)__entry->ip,
+		  __entry->error_code) );
+
+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(exceptions, page_fault_kernel,
+	TP_PROTO(unsigned long address,	struct pt_regs *regs, unsigned long error_code),
+	TP_ARGS(address, regs, error_code));
+
+#endif /*  _TRACE_PAGE_FAULT_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>