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=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 F2B91C433FF for ; Thu, 1 Aug 2019 12:13:26 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id C6F9D20838 for ; Thu, 1 Aug 2019 12:13:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="PnrvR/Wd" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C6F9D20838 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-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=bombadil.20170209; h=Sender:Content-Type: Content-Transfer-Encoding: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=G6WSVg8zisqFJlOiM1eYZT8c/gMoc2ECGvttfVj79FU=; b=PnrvR/WdggdKaU+DhFhP82EDG DsK2hRI+bY0jzBHZvpPMnbhbeB/x4Af8XeY/e5qfU2IOVFgWcEbZcUTZMwCQAuDsg6JsZ3gTJdEZw pWZmV15MzygXb95JiXEUi1aMPo0DAAune9Trx7OPQ/4m71FA/jOW3eKr4rmNTvafQGsEC2Q3aaQPq Mp8nxmflkkTAMMpjmZRumpOIuGe+hLUDTIjFwmRDVpCcj2Ki2NjQ4o7TshgLRyhuHn/woTeRbzAI6 Mp56JNrkNv5WQAV0S8QWYgpmbCX/d7r35QUm7U7Hz/OB7nYEg9u/VgfTtcYIFg8DUQF3pk2Z+ewxl 5pNa3pm5Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1ht9xQ-000472-4K; Thu, 01 Aug 2019 12:13:20 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1ht9vz-0002EP-2P for linux-arm-kernel@lists.infradead.org; Thu, 01 Aug 2019 12:11:52 +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 B3A191570; Thu, 1 Aug 2019 05:11:47 -0700 (PDT) Received: from [10.1.194.48] (e123572-lin.cambridge.arm.com [10.1.194.48]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 3A4393F575; Thu, 1 Aug 2019 05:11:42 -0700 (PDT) Subject: Re: [PATCH v19 00/15] arm64: untag user pointers passed to the kernel To: Dave Hansen , Andrey Konovalov , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org References: <8c618cc9-ae68-9769-c5bb-67f1295abc4e@intel.com> From: Kevin Brodsky Message-ID: <13b4cf53-3ecb-f7e7-b504-d77af15d77aa@arm.com> Date: Thu, 1 Aug 2019 13:11:40 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <8c618cc9-ae68-9769-c5bb-67f1295abc4e@intel.com> Content-Language: en-GB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190801_051151_209122_8417A1DF X-CRM114-Status: GOOD ( 13.18 ) 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: Mark Rutland , Szabolcs Nagy , Catalin Marinas , Will Deacon , Kostya Serebryany , Khalid Aziz , Felix Kuehling , Vincenzo Frascino , Jacob Bramley , Leon Romanovsky , Christoph Hellwig , Jason Gunthorpe , Dave Martin , Evgeniy Stepanov , Kees Cook , Ruben Ayrapetyan , Ramana Radhakrishnan , Alex Williamson , Mauro Carvalho Chehab , Dmitry Vyukov , Greg Kroah-Hartman , Yishai Hadas , Jens Wiklander , Lee Smith , Alexander Deucher , Andrew Morton , enh , Robin Murphy , Christian Koenig , Luc Van Oostenryck Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 31/07/2019 17:50, Dave Hansen wrote: > On 7/23/19 10:58 AM, Andrey Konovalov wrote: >> The mmap and mremap (only new_addr) syscalls do not currently accept >> tagged addresses. Architectures may interpret the tag as a background >> colour for the corresponding vma. > What the heck is a "background colour"? :) Good point, this is some jargon that we started using for MTE, the idea being that the kernel could set a tag value (specified during mmap()) as "background colour" for anonymous pages allocated in that range. Anyway, this patch series is not about MTE. Andrey, for v20 (if any), I think it's best to drop this last sentence to avoid any confusion. Kevin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel