From nobody Tue Oct 7 14:06:26 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 2405A242D89; Wed, 9 Jul 2025 19:21:47 +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=1752088909; cv=none; b=lxOqosXottYUYWgAMwWDqgtCI1J43qEYk/NKq6kEy5DsInK00+7MMoM0CbaegWk/63GT/KjI4tgU5LM+RWwmAxd38Q7QlAvzRgkuiVTW0d15cpotceURCXuoELgMgC8qzSel3rV2B3zeibfh4NmvG1cixG+akSYr/7qH2Nqshec= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752088909; c=relaxed/simple; bh=eX5oXC+HBcw1mu0TCAHq5i0a+I/QmsXUI8/vYm8odp4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=bEzU7SDS3JFlgIE/Tw2JJwHqbvhsBKmo9g3rnlBAip+AtECXHKjyzX7ca3yUcKByaI/Ii3ekl2gRGLpcNKkxSGm12oEoMDni0Jg8cLcL3E/0gA+Qapq524183LOtvg/rJgRItvZDgR4KzDqhxsk4AVfPNqyI6ssK9emRRENVWhI= 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=wa8z0sAu; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=TyMHXPJv; 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="wa8z0sAu"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="TyMHXPJv" From: Nam Cao DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1752088905; 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=GRN84yAGCbJ9jXd7YMFr0fN4dU5tvyZpKeky5D5bT9k=; b=wa8z0sAuK1tiGbDfapoO96J/FGkwok40iUnS56I0IB64jgisRzbeikXEc1zqh4Oc0kwPmX brR8UwfHYy1wi1EbqV5d3vKZ0CTye/y1HM96qSqH9n52DRerNKgM62IJVNoIGmdYyFo6+p le93w1R7/BZ86gP+pSLbTfkBtgeZeFwJm15emhC+hsh4E0pzUF89/AJPYhzMHd1iz4NLvj 0xQdfut08GvXYwbe+p11xHbZLmiL6trAAlros8pfGYfmQ8JY/Dl14kJYU/Dm1rHrcRcsbP Jk+SyGCo+3A3kIbCRm+FVB9LXecMoZmmNo5kJTLMMWDCbd0n/wBqsh2d6T0uyw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1752088905; 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=GRN84yAGCbJ9jXd7YMFr0fN4dU5tvyZpKeky5D5bT9k=; b=TyMHXPJvN47f4ZgztQwm6plU2xf6yUgtDfxc+6KRAQOwhrs+Uov4WT3BdZxDaN4YQ1Sbex woLTrV73fwWuZPAw== To: Steven Rostedt , John Ogness , Masami Hiramatsu , Mathieu Desnoyers , Gabriele Monaco , linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Nam Cao , Alexandre Ghiti , Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-riscv@lists.infradead.org Subject: [PATCH v13 08/12] riscv: mm: Add page fault trace points Date: Wed, 9 Jul 2025 21:21:19 +0200 Message-Id: <4cf34e53b16dde872369bab76bb019685d262a9e.1752088709.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 --- Cc: Paul Walmsley Cc: Palmer Dabbelt 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