From nobody Thu Dec 18 15:08:28 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 AD322267B15; Wed, 23 Apr 2025 06:50:46 +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=1745391049; cv=none; b=CeRDAdhnchORpI+lg/YP2PB1asL5TAjpOeQuhd2sMBzkWFqjcKjKhcWlsp14Nx2RksBnqy/ceI3r+rpMTKf/INjzVxadIVip7K3oYK4JnuOXOESrzDy+8E3Eodu0hnhdLtOwB2nG/lLoFJxkOMH+gTCmGdLsxHh0BZOihSNGB3Q= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745391049; c=relaxed/simple; bh=eX5oXC+HBcw1mu0TCAHq5i0a+I/QmsXUI8/vYm8odp4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ib9HoV0rd9ftMXod+JGDMgXitb991fZifGOjUjc4QCyMbsIMvUOudIZ/UekJrvdRMiN4e0dpqibsFjpzEs1swR8A+QOMumtvoB5k5yfABzfIdvaRHDoHLVY5YD+JEPyGNR5DBZjbS6OFUgx+WFgIc15k5yCw+JLsleADB/tJHjM= 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=fWFGa6B/; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=66lJ4fMn; 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="fWFGa6B/"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="66lJ4fMn" From: Nam Cao DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1745391040; 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=fWFGa6B/J/hJ7ThfApnt5/XFzcFknjNvDhRv47jaGvXCeNSsS/ZCsw9slPqCZ42soxwCug /iO6yCxJCuOXOFAk8RYdGBmp6BIcMCU3Qd8CYtoKzv6lH8YsRx7Y60+AZp7uE5uiEzeKDt dmZFU1ndg3pt9CLkE6qSiNcdJL5cfkxJmEguLhf0pNakL1kBUS8gHDBj62wgjGWGz/AouB zHYE0pvK7/5wFvW41WlO38wNRu/zzbhlcbnBQ0qBBZFYsGh9t9+G2FhWQnjXHX6+i+GMuM Ax3fOiQgSOBy1TMV/z8qVkwnHYTRaXY39Cf7HM8gi/LF6jiu6JyBGB2Pp3DI3Q== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1745391040; 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=66lJ4fMnVjS/5kJQh27nJyjJvPogmJXIyulDJU/ikxccrZ5i+hECSCawRsxVbnIzGb7IAj Hl4LG8qObw1Qe0DA== To: Steven Rostedt , Gabriele Monaco , linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: john.ogness@linutronix.de, Nam Cao , Alexandre Ghiti , Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-riscv@lists.infradead.org Subject: [PATCH v4 18/22] riscv: mm: Add page fault trace points Date: Wed, 23 Apr 2025 08:50:13 +0200 Message-Id: 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