Commit a37c71ca authored by Nam Cao's avatar Nam Cao Committed by Steven Rostedt (Google)
Browse files

riscv: mm: Add page fault trace points 



Add page fault trace points, which are useful to implement RV monitor that
watches page faults.

Signed-off-by: default avatarNam Cao <namcao@linutronix.de>
Acked-by: default avatarAlexandre Ghiti <alexghiti@rivosinc.com>
Signed-off-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
parent 886fc86e

arch/riscv/mm/fault.c

+8 −0
Original line number Diff line number Diff line
@@ -20,6 +20,9 @@ 
#include <asm/ptrace.h>

#include <asm/tlbflush.h>



#define CREATE_TRACE_POINTS

#include <trace/events/exceptions.h>



#include "../kernel/head.h"



static void show_pte(unsigned long addr)
@@ -291,6 +294,11 @@ void handle_page_fault(struct pt_regs *regs) 
	if (kprobe_page_fault(regs, cause))

		return;



	if (user_mode(regs))

		trace_page_fault_user(addr, regs, cause);

	else

		trace_page_fault_kernel(addr, regs, cause);



	/*

	 * Fault-in kernel-space virtual memory on-demand.

	 * The 'reference' page table is init_mm.pgd.