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=-2.2 required=3.0 tests=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 E40E5C3A59D for ; Fri, 16 Aug 2019 17:59:48 +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 BB42320665 for ; Fri, 16 Aug 2019 17:59:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BB42320665 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de 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 93F04CAA; Fri, 16 Aug 2019 17:59:48 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 4D95AC2C for ; Fri, 16 Aug 2019 17:59:47 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id D0BACE5 for ; Fri, 16 Aug 2019 17:59:46 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 94E9A68B05; Fri, 16 Aug 2019 19:59:42 +0200 (CEST) Date: Fri, 16 Aug 2019 19:59:42 +0200 From: Christoph Hellwig To: Will Deacon Subject: Re: [PATCH 6/6] arm64: document the choice of page attributes for pgprot_dmacoherent Message-ID: <20190816175942.GA4879@lst.de> References: <20190816070754.15653-1-hch@lst.de> <20190816070754.15653-7-hch@lst.de> <20190816173118.4rbbzuogfamfa554@willie-the-truck> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190816173118.4rbbzuogfamfa554@willie-the-truck> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: Shawn Anastasio , linux-m68k@lists.linux-m68k.org, Catalin Marinas , 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 , James Hogan , Guan Xuetao , Christoph Hellwig , linux-arm-kernel@lists.infradead.org, Robin Murphy 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 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. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu