From nobody Mon Feb 9 20:36:48 2026 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 7352C2980DC; Fri, 11 Apr 2025 07:38:14 +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=1744357096; cv=none; b=RQdPP+YOCKf0NGMKiPNxzEprnqgMjYOniS/qTKMYzj/WtoVl8yvzRAAfU0HyKTPd0I378FZYfvmgReCIselhm/sOY4gxYE+sp/Vli21cO4Ch/Z4TP9VD8uzQMQJDjd035IUY3VKdafU8q5mDQp4kHBjhds4kV2aWmurRx5qmYFQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744357096; c=relaxed/simple; bh=D+9wO9dNN3EYV0lv+fWUQwBnCRPK8BfN8oSeYBiKgwM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=T+Y32EVvAhPjOcnKXIQ+x0M8YXqxe5GfqjyF9VELU8WBn2Z39BsQf2HKHaQQ8aNcspiZ68HveGwGLdqTRYwfH5C5FgBMW4rB8Xr+/loD6um1tfsk5UzO1kzFFIb5UHtWHbYt5V52sUj9j53QoOd8ClPHSg1mHjLqmdX8XP8TZso= 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=f4DJbwmz; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=q7ZNzw7K; 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="f4DJbwmz"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="q7ZNzw7K" From: Nam Cao DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1744357092; 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=X+UQEszhhyx5orvv0upRMEVuQLmNZT576sheEcGpELI=; b=f4DJbwmzrkW7mPK9AHeAMNkaHKQb6i9D8wE+SjlI+6clttDzOXS+BH/xxNfaZnijDwvdOt o7eAVGZ+a1CE4f/4FkFqOxnwC9JVHPkMXqvimm41ko07kwtSwv6CcXwyYcRUMcuWrB4yO1 WDpXcU36HnTCzuCfTd19Z/x6xdlaWhad04mswouMPSJHfhCHiPJBAOTNMdJvQdlgXiAIKC lgNEG17P4M9QKvyTvrBr2oMMyWGHeolQyB66jng4iaN2IzNfFpgjNA7k07Awn5B9rL9559 klyZS1lhgO3nlRb0g9jCzNmW9t2xoCiDwbTYl1vzuq9M8geXllHaL7D+J0CMjg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1744357092; 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=X+UQEszhhyx5orvv0upRMEVuQLmNZT576sheEcGpELI=; b=q7ZNzw7KLTD8TrmZLui1q3zZXO8wwN74y0sMcI8jWDUU/BiH5Q1vArAYZTTz/JIp9gH6Ok sOiFNeZHbpm2KzDg== To: Steven Rostedt , Gabriele Monaco , linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: john.ogness@linutronix.de, Nam Cao , Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 17/22] arm64: mm: Add page fault trace points Date: Fri, 11 Apr 2025 09:37:33 +0200 Message-Id: <952afa13306026813a5731703d6a86fb48f4ccf8.1744355018.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 which watches page faults. Signed-off-by: Nam Cao --- Cc: Catalin Marinas Cc: Will Deacon Cc: linux-arm-kernel@lists.infradead.org --- arch/arm64/mm/fault.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index ef63651099a9..e3f096b0dffd 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -44,6 +44,9 @@ #include #include =20 +#define CREATE_TRACE_POINTS +#include + struct fault_info { int (*fn)(unsigned long far, unsigned long esr, struct pt_regs *regs); @@ -559,6 +562,11 @@ static int __kprobes do_page_fault(unsigned long far, = unsigned long esr, if (kprobe_page_fault(regs, esr)) return 0; =20 + if (user_mode(regs)) + trace_page_fault_user(addr, regs, esr); + else + trace_page_fault_kernel(addr, regs, esr); + /* * If we're in an interrupt or have no user context, we must not take * the fault. --=20 2.39.5