From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9848583CC7 for ; Thu, 10 Jul 2025 00:32:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752107552; cv=none; b=GMs/EWeDVSlFkPjE8gnpFqKLSOjnhc4pzZ2kEPBtzSdpQ52gzyC05srCO0Kx8wDoFZ6u5o4Xf6HQe+unHzfu6PcArvROzf3xSG43sHdc1nO+BqJlP5a1hCE04AtWXwm7VEjtjP9sCpm2a5GmkY32vKTrHFSreo2h4byAKg/tK98= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752107552; c=relaxed/simple; bh=kRH1bCB8ne6m128KerpvU2IrCPOjChoMX05DviKRJPM=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=gWHbQpLjzix+M2YNJ7KV0qUcf5/rY3NvlABwIvCFUYso+HpoQKQjr5g0qWV6sknWWGMp4OWtHzV96VPXL+32H0rdhcoFbAwqJPS+YSdyM72ekJqKtvWy9JtHkRMA8i18pfw2W1IEUAUlSn7Brx27USjRNvDcn4wV/iVGxa/iLzk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=W68ETzKz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="W68ETzKz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3BAFCC113CF; Thu, 10 Jul 2025 00:32:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1752107552; bh=kRH1bCB8ne6m128KerpvU2IrCPOjChoMX05DviKRJPM=; h=Date:From:To:Cc:Subject:References:From; b=W68ETzKzMyOSzztjalw6/lEzM1umwGcJRGebYSW5HPi67RdxzIFvcrYB1iDmvLokB dOBR6E1p3ykejzo4LyAwlY+RXv5TAf+YWErfNAnLvU3wgkBZAipzG0ud2ScNBtMXnO UepsGlYPO8UufFt1e0hzTQH/54oI5GwlFCycfDgC2tl1ShyihlH6UFLgoLlSJQeC+/ loMWVgJZw1NIZ/BWTD2GNMuZB3huF3FH+okDixF19WWAcuhyd+skkTvWITcyopAhxq /vGPB6rD6hw1tf33m9dYw7Rot1EzhHUoDgVFr3UFx5RRp/SxE1BDMLYAkqOVKfIqzY fkWKAN6nH+y1g== Received: from rostedt by gandalf with local (Exim 4.98.2) (envelope-from ) id 1uZfDI-00000001WRF-3cqr; Wed, 09 Jul 2025 20:32:36 -0400 Message-ID: <20250710003236.710679622@kernel.org> User-Agent: quilt/0.68 Date: Wed, 09 Jul 2025 20:32:04 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Nam Cao , Alexandre Ghiti Subject: [for-next][PATCH 08/12] riscv: mm: Add page fault trace points References: <20250710003156.209859354@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 From: Nam Cao Add page fault trace points, which are useful to implement RV monitor that watches page faults. Signed-off-by: Nam Cao Acked-by: Alexandre Ghiti Signed-off-by: Steven Rostedt (Google) --- 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 #include +#define CREATE_TRACE_POINTS +#include + #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