From nobody Wed Oct 8 00:42:30 2025 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 4739A30749D; Fri, 4 Jul 2025 13:20:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751635245; cv=none; b=oTZthLbv33Sjcq1woGcgKGSdHXEICFXsH4ey74SlO9sNR3UoM9jioyZLqZse+xCr7rqOP6HD3VF5Iwa8hTODjgDRuvBGqj4y+9sqEu4Q8fk2Fkkt6Migxl5pxnvgkO8yinRtzDLaPd0e+Lb7PHuyQkJZ41SddZ+UTxC0bKgciOQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751635245; c=relaxed/simple; bh=FWBQX1/asfPTUJ186TDblgFmvHyPG/sEa71kKq0O6D4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=dOhOvS5AwVdd8BDsEIPt4YdDOHwUot6kPvt4GusWLjfpiYURSO3OGRA+ans0ebybAPVRmDB5uj3ByiFHR+TLvIf0SXDKWtQ4eXaCqt54Nju5rkEMZvUaRDK2bmSwp4Tt1ZBwJBhxgA5VY5Xr5W41erd+TVfJPmlfIcFkgBe42wc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=BdZMuLx8; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=FgxC8+w9; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="BdZMuLx8"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="FgxC8+w9" From: Nam Cao DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1751635240; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=EE8nze+dHV488yKI++rzQSjed2WDi861RqnjmSmBFVc=; b=BdZMuLx8cSXRL5EOMJAQ26EuaXJpzQsttckmE06bw/HAGjLRF9iAwRN9fxNaPyQv838kvm 5Vlrh8g9JUuXPAsH/U7dKI6XTkpskUBziil2Rvn+FBPZWw5sBD8mzUh9ZDdiJDYl6bGjyQ eXzCzt7uOIObnj9t2YGxaN1tMNMdXPoSlzL7+4MTWxe6BDWgUTctzrk1y/HVPCaEgoaJJN s4XfOnZDLldBcLE1MM3NvzPTvDdFlDAgPpr9gcDJJ+gR88uv96UgcmJv7CTJAw9sUx+k2R iAYqNh6/10UXPCWDHYjJzAZlZc76QSKYyIBSgGAW9zrU+Gacp/Jz4mksLIBWLg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1751635240; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=EE8nze+dHV488yKI++rzQSjed2WDi861RqnjmSmBFVc=; b=FgxC8+w9z4RUHzTPkrnkogGgx03o6FFPgAURnK5rWK+Y/OBBxXCKWrHbsqZ6ruZvye7UDX N5/YM3gzDoHZZWBA== To: Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Gabriele Monaco , john.ogness@linutronix.de, Nam Cao , Alexandre Ghiti , Palmer Dabbelt , Paul Walmsley , Albert Ou , linux-riscv@lists.infradead.org Subject: [PATCH v11 17/21] riscv: mm: Add page fault trace points Date: Fri, 4 Jul 2025 15:20:09 +0200 Message-Id: <97604a88be30e672e40a0ddf02a1d5a623ed8c97.1751634289.git.namcao@linutronix.de> In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 Acked-by: Palmer Dabbelt --- Cc: Paul Walmsley Cc: Albert Ou Cc: linux-riscv@lists.infradead.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 #include =20 +#define CREATE_TRACE_POINTS +#include + #include "../kernel/head.h" =20 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; =20 + 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. --=20 2.39.5