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=DKIM_INVALID,DKIM_SIGNED, 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 B6DB9C3A59D for ; Fri, 16 Aug 2019 18:05:30 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (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 7FCC321743 for ; Fri, 16 Aug 2019 18:05:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="yclaVWCY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7FCC321743 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 5CC3DC7D; Fri, 16 Aug 2019 18:05:30 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 78736C75 for ; Fri, 16 Aug 2019 18:05:29 +0000 (UTC) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 31F36786 for ; Fri, 16 Aug 2019 18:05:28 +0000 (UTC) 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 7830C20665; Fri, 16 Aug 2019 18:05:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565978727; bh=ATa8fe0CxhAbQASCjl6IYhzQjKdSYeQNhdmBcA2ZRlU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=yclaVWCYpQyvh9OaGQPrYfiMYsvcW/o5PkOIV7eQUmhstIzpx2ZZ0sSjiKcxqnMgv 7z+Jikxzq4/ZIHpHnEO2nuFXbcvpn1v46HdwXjYNwayNZxp8x1aicBOflxg1CSeLTk vayH5O/ix+LVeWKI9G785+H8RXwq5z7rEAqzMsfo= Date: Fri, 16 Aug 2019 19:05:22 +0100 From: Will Deacon To: Christoph Hellwig Subject: Re: [PATCH 6/6] arm64: document the choice of page attributes for pgprot_dmacoherent Message-ID: <20190816180522.gocqeayajlbu4gzp@willie-the-truck> References: <20190816070754.15653-1-hch@lst.de> <20190816070754.15653-7-hch@lst.de> <20190816173118.4rbbzuogfamfa554@willie-the-truck> <20190816175942.GA4879@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190816175942.GA4879@lst.de> User-Agent: NeoMutt/20170113 (1.7.2) Cc: Shawn Anastasio , linux-m68k@lists.linux-m68k.org, Guan Xuetao , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Russell King , linux-mips@vger.kernel.org, iommu@lists.linux-foundation.org, Geert Uytterhoeven , Paul Burton , Catalin Marinas , James Hogan , Robin Murphy , linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org On Fri, Aug 16, 2019 at 07:59:42PM +0200, Christoph Hellwig wrote: > On Fri, Aug 16, 2019 at 06:31:18PM +0100, Will Deacon wrote: > > Mind if I tweak the second sentence to be: > > > > This is different from "Device-nGnR[nE]" memory which is intended for MMIO > > and thus forbids speculation, preserves access size, requires strict > > alignment and can also force write responses to come from the endpoint. > > > > ? It's a small change, but it better fits with the arm64 terminology > > ("strongly ordered" is no longer used in the architecture). > > > > If you're happy with that, I can make the change and queue this patch > > for 5.4. > > I'm fine with the change, but you really need this series as base, > as there is no pgprot_dmacoherent before the series. So I think I'll > have to queue it up if we want it for 5.4, and I'll need a few more > reviews for the other patches in this series first. Ah, I didn't think about the contextual stuff. In which case, with my change in wording: Acked-by: Will Deacon and feel free to route it with the rest. Thanks, Will _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu