From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 34924C433E0 for ; Fri, 22 Jan 2021 11:22:08 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CFFCB22DBF for ; Fri, 22 Jan 2021 11:22:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CFFCB22DBF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=/AboAjAvvv85z04Lm0LNyNHuX7ECH8ESMwG8ZO/KPog=; b=UxQUe3VleH7BbwxNf15B1vBc5 gbSSjSyCZmJkTGLUWBgLdG8sTjs/obzFJy4OT0Nvp/WpnzDDIyL0Fnb3lQD+bDNRl3we9iXAYVTrD fJe1NPREGzUKclh2+w7USAH8iubJt8KedM3Ot3A77QEC/RwuKHKaqfvjskry3gIjw3dQKWsozwkON YB+3tENVJXn8upeKpo0bi9ii0DXDBjY86BQlNS+Iq5RO7k7TYQ3CwsixjZtQnfxGkG2Yu3mc6BupY Td1uAWmlrFY32JUSRN/4G78feJtlrnJz94rywv0eH3Smww4OIA3tp5AUEp1cd+1w4wRUz2seEOFqL +27qm+8rA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l2uUi-0004zm-8J; Fri, 22 Jan 2021 11:20:48 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l2uUf-0004yo-OB for linux-arm-kernel@lists.infradead.org; Fri, 22 Jan 2021 11:20:46 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C691911D4; Fri, 22 Jan 2021 03:20:39 -0800 (PST) Received: from [10.37.8.28] (unknown [10.37.8.28]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id D45203F719; Fri, 22 Jan 2021 03:20:37 -0800 (PST) Subject: Re: [PATCH v5 4/6] arm64: mte: Enable async tag check fault To: Andrey Konovalov References: <20210121163943.9889-1-vincenzo.frascino@arm.com> <20210121163943.9889-5-vincenzo.frascino@arm.com> From: Vincenzo Frascino Message-ID: <04eba2be-641b-ee23-7fa0-436c33168cd8@arm.com> Date: Fri, 22 Jan 2021 11:24:28 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210122_062045_874309_F4E8FFA0 X-CRM114-Status: GOOD ( 12.96 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Branislav Rankov , Marco Elver , Catalin Marinas , Evgenii Stepanov , LKML , kasan-dev , Alexander Potapenko , Linux ARM , Andrey Ryabinin , Will Deacon , Dmitry Vyukov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 1/21/21 5:38 PM, Andrey Konovalov wrote: >> + if (unlikely(tfsr_el1 & SYS_TFSR_EL1_TF1)) { >> + /* >> + * Note: isb() is not required after this direct write >> + * because there is no indirect read subsequent to it >> + * (per ARM DDI 0487F.c table D13-1). >> + */ >> + write_sysreg_s(0, SYS_TFSR_EL1); >> + >> + kasan_report_async(); > Do we need a static bool reported like in do_tag_recovery() here? > I would say not because async mode does not get disabled after the first fault. -- Regards, Vincenzo _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel