From patchwork Tue Mar 11 17:05:08 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nam Cao X-Patchwork-Id: 14012368 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 1374D2627F7; Tue, 11 Mar 2025 17:05:30 +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=1741712732; cv=none; b=eFKdh6RoviHo8M3uCO4J3YE/6Rg0qXhgDaQcGd9dtjVc6SQsrkx3ITIR6ulLxtkf4i6imgIeV2tLdydoiyMN0Bf+tEjkWF8AwgxWvbI1AgMBJRaPH46u0DQSjMBaPcGyzvbVSx5k1USEMWa7sLKn5hL6EDGeXkpW4WE5oBPt/xs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741712732; c=relaxed/simple; bh=D+9wO9dNN3EYV0lv+fWUQwBnCRPK8BfN8oSeYBiKgwM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=mOgFeblupDtQRuDiA5n5Uj/hQci/bpW966SJFq8lLewjWQXNCJT2KmbrBcpvdqjc5OL+SYnin4PkJxxnKMLAuop2CxFZAOUTvDRAeZKDnLplVvPn2+Q8e6ofGRGXJUWk7BScDXdHF0PkCeXA/ldwNiRwat/4XBlye5H3h1zqoI8= 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=JX/apJ6A; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=ODNxZbHi; 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="JX/apJ6A"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="ODNxZbHi" From: Nam Cao DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1741712729; 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=JX/apJ6Aq294GtNFtWBDY1h21N4G6n7nl2fRrE9E/WmEtZxy+1i5wRJW8fYrOGeb/ne36d uQyhzCAFSVA8hju3+hF3tRS7+rgin2pLZGjVSDhwCthQwHeWkP94K3AMXQr30P6IXeGEoa HL+sMqICIQQxBDqXfSGX25QYqhvWFEoLWeVJl/IC0C8wgIZg3YZ0s7s04N0bNsCr5khmwA idNvJOGBJNBa4ZLsrbTQFgZusuVtFEtS1XUSl/2ZafM190I9RobcPkPLgtscKhI8uNquBy 1Q0kgD4cDtgg9dIhW0IWmM2gYavNzTvAjCtXXlABbhsFlKDWfR9LtFJ3HA+sVw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1741712729; 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=ODNxZbHikYX6l09olaUFn80cowWI3Hts4RadOge3WcTBvX7pReRC+rR5OK+shtOPsdb7wH KpNeVsKUza8mjmDw== To: Steven Rostedt , Gabriele Monaco , john.ogness@linutronix.de, linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Nam Cao , Catalin Marinas , Will Deacon , linux-arm-kernel@lists.infradead.org Subject: [PATCH 07/10] arm64: mm: Add page fault trace points Date: Tue, 11 Mar 2025 18:05:08 +0100 Message-Id: In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 +#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; + 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.