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=-2.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,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 3A944C33CB1 for ; Thu, 16 Jan 2020 10:48:02 +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 0C8DA205F4 for ; Thu, 16 Jan 2020 10:48:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="qnhq1jPh"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="y36CublJ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0C8DA205F4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=isrMgq2KE4LjtD5J2H0wPlhrDueLcUIrBIB7FvmXMP0=; b=qnhq1jPhNmWcrN 5YGHcQHCgJvF9O6MdLdeZWTmPb48EaoaBxWTUXUYRCan2VffFoJElt0DcdcFr3RvDfS0KSoumuDnm dA6lKYiZIkfNzOKxNWux+DFkJ66wOMl/06PGSM0y4DcKiuw3Ioj00VRKfP/UDQLHGajkc3oJ+U39b 8fMdL0paHcy2fCT7RlwVy389s7wpq+EMUUe2npCgM3nqLZIKFTW0cZAyiI5vGhaj3sKTmZOlZbCsj XSU98/LRDcBZcrmvOzP6eAalrWA4yQWXdWKdmvTJDbmTUE/r78UmT9C0BZe7wjyoD7Y4tAAfwQYtU n4EtpHzJwiVQq2lQPr9Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1is2gy-0002KI-Cz; Thu, 16 Jan 2020 10:48:00 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1is2gq-0002Iw-Fb for linux-arm-kernel@lists.infradead.org; Thu, 16 Jan 2020 10:47:58 +0000 Received: from willie-the-truck (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0B05E205F4; Thu, 16 Jan 2020 10:47:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579171671; bh=UdGMbdry9FO+CwnA8duoUtdCiqKW74vOro3QldKWGEI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=y36CublJYdb+gAUpr1THN6gtFzA+rYFet1+/+lybPdjg6sLMXpBBL6D3u6KwwNEyM Ty1MZot+GXFlhVjv0StXKTYDaTI0MCSBXpgiY25epD02ZX4JtS46YkvuFR1CDQSq84 Ev3zkc60gd+jqw8BGBDcuH7pHwVmB8/64mcreyL0= Date: Thu, 16 Jan 2020 10:47:46 +0000 From: Will Deacon To: Marc Zyngier Subject: Re: [PATCH v5 0/3] arm64: Workaround for Cortex-A55 erratum 1530923 Message-ID: <20200116104746.GB14761@willie-the-truck> References: <20191216115631.17804-1-steven.price@arm.com> <20200114164543.GD2579@willie-the-truck> <3292551ef07b2c5354d48faedad849ff@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <3292551ef07b2c5354d48faedad849ff@kernel.org> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200116_024752_543032_D23F1AC3 X-CRM114-Status: GOOD ( 16.71 ) 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: Catalin Marinas , kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Steven Price Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Jan 16, 2020 at 07:28:49AM +0000, Marc Zyngier wrote: > On 2020-01-14 16:45, Will Deacon wrote: > > On Mon, Dec 16, 2019 at 11:56:28AM +0000, Steven Price wrote: > > > Version 5 is a rebasing of version 4 (no changes). > > > > > > This series enables a workaround for Cortex-A55 erratum 1530923. The > > > erratum potentially allows TLB entries to be allocated as a result > > > of a > > > speculative AT instruction. This may happen in the middle of a guest > > > world switch while the relevant VMSA configuration is in an > > > inconsistent > > > state, leading to erroneous content being allocated into TLBs. > > > > > > There are existing workarounds for similar issues, 1165522 is > > > effectively the same, and 1319367/1319537 is similar but without VHE > > > support. Rather than add to the selection of errata, the first patch > > > renames 1165522 to WORKAROUND_SPECULATIVE_AT which can be reused (in > > > the > > > final patch) for 1530923. > > > > > > The workaround for errata 1319367 and 1319537 although similar cannot > > > use VHE (not available on those CPUs) so cannot share the workaround. > > > However, to keep some sense of symmetry the workaround is renamed to > > > SPECULATIVE_AT_NVHE. > > > > > > Changes since v4: > > > * Rebased to v5.5-rc1 > > > > Looks fine to me. Marc, are you ok with me queueing this via arm64 > > (that's > > where the existing workarounds came from), or would you prefer to take > > them > > via kvm-arm? > > Please go ahead and take it (with my ack) via the arm64 tree. Will do, thanks! Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel