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

Author: covanam

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

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

arch/x86/include/asm/trace/exceptions.h renamed to 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),
@@ -22,26 +22,21 @@ 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;
 	),
 
 	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,
+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 */