Hi Nam,
On 11/03/2025 18:05, Nam Cao wrote:
Add page fault trace points, which are useful to implement RV monitor that
watches page faults.
Signed-off-by: Nam Cao <[email protected]>
---
Cc: Paul Walmsley <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: Albert Ou <[email protected]>
Cc: Alexandre Ghiti <[email protected]>
Cc: [email protected]
---
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.
For this riscv part, you can add:
Acked-by: Alexandre Ghiti <[email protected]>
Thanks,
Alex
