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: 14012383 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9D310C28B2F for ; Tue, 11 Mar 2025 17:09:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=X+UQEszhhyx5orvv0upRMEVuQLmNZT576sheEcGpELI=; b=XKhwyxyIftW1ajvMS0Cgj2Vp7g m0xPFlcLTERkdhmH98JkVvEQiA9z6CD2qvlnwxr1LBUQqivplHUk9HwgVytBklvCydjbcZzvKe+/N 2L44eHZyCJby88i08vZVZ6iFTCIDFoHtWa1gMJyAjES0nmG8Wcr4QQfRQzlhuIV5ir5gEI6zV3Hca TQTvVM+yVKXaEDUF38kNYwkdrSz7fDaMpVAbBL6ZyFxs9XkOFrryznR2+dLHR5hOmszjP2GNZOAo0 zpvBBHPhfL2PzmcRyLTB4R1G1rvbmT9QusC4Q9zSulvcG6nmgBOuZdSLge5OC5SiqnCHY+1AvxG/i MtImVINQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1ts366-00000006PSM-0fQe; Tue, 11 Mar 2025 17:08:54 +0000 Received: from galois.linutronix.de ([193.142.43.55]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1ts32o-00000006OTp-2HUw for linux-arm-kernel@lists.infradead.org; Tue, 11 Mar 2025 17:05:32 +0000 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: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250311_100530_731383_35E15B94 X-CRM114-Status: UNSURE ( 9.99 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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.