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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: Nam Cao <namcao@linutronix.de>
Acked-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Nam Cao 2025-07-09 21:21:19 +02:00 committed by Steven Rostedt (Google)
parent 886fc86e94
commit a37c71ca41
1 changed files with 8 additions and 0 deletions
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8
arch/riscv/mm/fault.c
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@ -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.