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=-10.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 EEFE1C47095 for ; Wed, 9 Jun 2021 09:29:20 +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 8C55A6120F for ; Wed, 9 Jun 2021 09:29:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8C55A6120F 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=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:From:References:Cc:To:Subject:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=CHOj8Gp81YITPOQOqxFKYjzLUIaTsoqiABXfRPMsKCA=; b=bmLNQiW0Hftfk3RKfRmeLYWKn5 dU/NbkpIXQ6nnO5OTVSkDcfFpn5OWsPtdkKSbaZh/M7zlNfGaWWjTFUo131KJmo5wGVHJ9vGNSSIX rAy/gfk5bmMUKZNHICzjovq1HYhNdNijrT7Uy4NZjXfbfvOSAuyJmTbWEvCdgp8XCVQYb6jjz8aQn 2ebLI6dk6qgfFBzwjqJMVtT9MvyfUxgRmiXPgWoFGv+J2KgUmCFxxTtfPCzYssy27j2DeItUv6a3t EeO8sIO+j90cyga9e99vjPzx7x4AgmwNMJsC40lvOfA9Q3WiPWep7RvKcWLweDgEEeZZ37m/AyGHe 7ARxevcw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lquUM-00CfMf-60; Wed, 09 Jun 2021 09:27:08 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lqu1B-00CW37-Hu for linux-arm-kernel@lists.infradead.org; Wed, 09 Jun 2021 08:56:59 +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 1DAD811FB; Wed, 9 Jun 2021 01:56:51 -0700 (PDT) Received: from [192.168.1.179] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 8AA293F719; Wed, 9 Jun 2021 01:56:48 -0700 (PDT) Subject: Re: [PATCH v14 2/8] arm64: Handle MTE tags zeroing in __alloc_zeroed_user_highpage() To: Catalin Marinas Cc: Marc Zyngier , Will Deacon , James Morse , Julien Thierry , Suzuki K Poulose , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Dave Martin , Mark Rutland , Thomas Gleixner , qemu-devel@nongnu.org, Juan Quintela , "Dr. David Alan Gilbert" , Richard Henderson , Peter Maydell , Haibo Xu , Andrew Jones References: <20210607110816.25762-1-steven.price@arm.com> <20210607110816.25762-3-steven.price@arm.com> <20210607170714.GA17957@arm.com> From: Steven Price Message-ID: <7a3f14de-211b-94f9-6886-393d233193d5@arm.com> Date: Wed, 9 Jun 2021 09:56:43 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <20210607170714.GA17957@arm.com> Content-Language: en-GB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210609_015657_692255_85A513DE X-CRM114-Status: GOOD ( 15.35 ) 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: , 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 07/06/2021 18:07, Catalin Marinas wrote: > On Mon, Jun 07, 2021 at 12:08:10PM +0100, Steven Price wrote: >> From: Catalin Marinas >> >> Currently, on an anonymous page fault, the kernel allocates a zeroed >> page and maps it in user space. If the mapping is tagged (PROT_MTE), >> set_pte_at() additionally clears the tags under a spinlock to avoid a >> race on the page->flags. In order to optimise the lock, clear the page >> tags on allocation in __alloc_zeroed_user_highpage() if the vma flags >> have VM_MTE set. >> >> Signed-off-by: Catalin Marinas >> Signed-off-by: Steven Price > > I think you can drop this patch now that Peter's series has been queued > via the arm64 tree: > > https://lore.kernel.org/r/20210602235230.3928842-4-pcc@google.com > Thanks for the heads up - I hadn't seen that land. I'll drop this patch from the next posting. Steve _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel