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=HEADER_FROM_DIFFERENT_DOMAINS, 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 D1721C41514 for ; Wed, 24 Jul 2019 17:55:55 +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 9472721852 for ; Wed, 24 Jul 2019 17:55:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9472721852 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 50F42EBE; Wed, 24 Jul 2019 17:55:55 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 41BC0EBD for ; Wed, 24 Jul 2019 17:55:54 +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 B6580FE for ; Wed, 24 Jul 2019 17:55:53 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 4813E68B20; Wed, 24 Jul 2019 19:55:51 +0200 (CEST) Date: Wed, 24 Jul 2019 19:55:51 +0200 From: Christoph Hellwig To: Nicolas Saenz Julienne Subject: Re: [PATCH 2/2] arm: use swiotlb for bounce buffer on LPAE configs Message-ID: <20190724175551.GA13073@lst.de> References: <20190709142011.24984-1-hch@lst.de> <20190709142011.24984-3-hch@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Cc: Vignesh Raghavendra , Konrad Rzeszutek Wilk , linux-kernel@vger.kernel.org, Russell King - ARM Linux admin , iommu@lists.linux-foundation.org, Christoph Hellwig , linux-arm-kernel@lists.infradead.org, Roger Quadros 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 Wed, Jul 24, 2019 at 07:23:50PM +0200, Nicolas Saenz Julienne wrote: > Out of curiosity, what is the reason stopping us from using dma-direct/swiotlb > instead of arm_dma_ops altogether? Nothing fundamental. We just need to do a very careful piecemeal migration as the arm code handles a ot of interesting corner case and we need to ensure we don't break that. I have various WIP patches for the easier bits and we can work from there. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu