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=-5.4 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,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 1E73DC433E6 for ; Mon, 18 Jan 2021 15:43:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E10CE206DC for ; Mon, 18 Jan 2021 15:43:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393537AbhARPl4 (ORCPT ); Mon, 18 Jan 2021 10:41:56 -0500 Received: from foss.arm.com ([217.140.110.172]:38116 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2392507AbhARPh7 (ORCPT ); Mon, 18 Jan 2021 10:37:59 -0500 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 CA3EC1FB; Mon, 18 Jan 2021 07:37:09 -0800 (PST) Received: from [10.37.8.29] (unknown [10.37.8.29]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4AB043F68F; Mon, 18 Jan 2021 07:37:07 -0800 (PST) Subject: Re: [PATCH v3 3/4] arm64: mte: Enable async tag check fault From: Vincenzo Frascino To: Catalin Marinas Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, Will Deacon , Dmitry Vyukov , Andrey Ryabinin , Alexander Potapenko , Marco Elver , Evgenii Stepanov , Branislav Rankov , Andrey Konovalov References: <20210115120043.50023-1-vincenzo.frascino@arm.com> <20210115120043.50023-4-vincenzo.frascino@arm.com> <20210118125715.GA4483@gaia> Message-ID: <330506b9-b7e9-8fda-889a-0827229e1a3d@arm.com> Date: Mon, 18 Jan 2021 15:40:55 +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-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1/18/21 1:37 PM, Vincenzo Frascino wrote: >> If a speculated load is allowed to update this reg, we'd probably need an >> ISB+DSB (I don't think it does, something to check with the architects). >> > I will check this with the architects and let you know. I spoke to the architects and no speculative load can update TFSR_EL1. -- Regards, Vincenzo 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=-5.6 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 8BCB7C433E0 for ; Mon, 18 Jan 2021 15:38:40 +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 4099821D7F for ; Mon, 18 Jan 2021 15:38:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4099821D7F 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:References: To:From:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=jBMzFg/mgAefgHpWAJb3TDvKotxOGyR9tt42nNz0WSc=; b=vfzxrE+UIW2Permj4n2nAXNdb hQSR6lLMyinQ0H4d9a288S++NBmLz8y7I3lnSbstGFxuRlg9g+vEtwGomDQmI/LCfLIYPNO3874qS ApgYVP8PRvTrxiww3OPUAid2fOMtd5iRVGX1LVI909GSF6whKgNqa1F3dbHbTIN4//WxeNaWGyutb VZ9kNLcRrj0DoRwnBWgIGrfN/UkYd3E8Cejbpq4vPivQRIwxFSNxbGqS26ExqkMOlK2zw/wY3hznS gBPB5AM1/n+VLtpKYEXcMrBNzSpEexAeGhFSP4IceenJ2rn6I0/QX+kbmFTTrZObIl0tTHv3nv7GQ ObfBTAahg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l1Waf-0006dj-Hr; Mon, 18 Jan 2021 15:37:13 +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 1l1Wac-0006cu-Do for linux-arm-kernel@lists.infradead.org; Mon, 18 Jan 2021 15:37:11 +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 CA3EC1FB; Mon, 18 Jan 2021 07:37:09 -0800 (PST) Received: from [10.37.8.29] (unknown [10.37.8.29]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4AB043F68F; Mon, 18 Jan 2021 07:37:07 -0800 (PST) Subject: Re: [PATCH v3 3/4] arm64: mte: Enable async tag check fault From: Vincenzo Frascino To: Catalin Marinas References: <20210115120043.50023-1-vincenzo.frascino@arm.com> <20210115120043.50023-4-vincenzo.frascino@arm.com> <20210118125715.GA4483@gaia> Message-ID: <330506b9-b7e9-8fda-889a-0827229e1a3d@arm.com> Date: Mon, 18 Jan 2021 15:40:55 +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-20210118_103710_502790_F4B4B090 X-CRM114-Status: UNSURE ( 9.95 ) X-CRM114-Notice: Please train this message. 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 , Andrey Konovalov , Evgenii Stepanov , linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, Alexander Potapenko , linux-arm-kernel@lists.infradead.org, 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 1/18/21 1:37 PM, Vincenzo Frascino wrote: >> If a speculated load is allowed to update this reg, we'd probably need an >> ISB+DSB (I don't think it does, something to check with the architects). >> > I will check this with the architects and let you know. I spoke to the architects and no speculative load can update TFSR_EL1. -- Regards, Vincenzo _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel