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Message-ID: <20250710003236.710679622@kernel.org> Date: Wed, 09 Jul 2025 20:32:04 -0400 From: Steven Rostedt <rostedt@...nel.org> To: linux-kernel@...r.kernel.org Cc: Masami Hiramatsu <mhiramat@...nel.org>, Mark Rutland <mark.rutland@....com>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, Andrew Morton <akpm@...ux-foundation.org>, Nam Cao <namcao@...utronix.de>, Alexandre Ghiti <alexghiti@...osinc.com> Subject: [for-next][PATCH 08/12] riscv: mm: Add page fault trace points From: Nam Cao <namcao@...utronix.de> Add page fault trace points, which are useful to implement RV monitor that watches page faults. Signed-off-by: Nam Cao <namcao@...utronix.de> Acked-by: Alexandre Ghiti <alexghiti@...osinc.com> Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org> --- arch/riscv/mm/fault.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c index 0194324a0c50..04ed6f8acae4 100644 --- a/arch/riscv/mm/fault.c +++ b/arch/riscv/mm/fault.c @@ -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. -- 2.47.2
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