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,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 3CFC8C3A59E for ; Sun, 18 Aug 2019 03:08:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1C8742089C for ; Sun, 18 Aug 2019 03:08:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726469AbfHRDIl (ORCPT ); Sat, 17 Aug 2019 23:08:41 -0400 Received: from mga02.intel.com ([134.134.136.20]:33107 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726217AbfHRDIk (ORCPT ); Sat, 17 Aug 2019 23:08:40 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Aug 2019 20:08:39 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,399,1559545200"; d="scan'208";a="171787363" Received: from allen-box.sh.intel.com (HELO [10.239.159.136]) ([10.239.159.136]) by orsmga008.jf.intel.com with ESMTP; 17 Aug 2019 20:08:34 -0700 Cc: baolu.lu@linux.intel.com, Joerg Roedel , David Woodhouse , Bjorn Helgaas , ashok.raj@intel.com, jacob.jun.pan@intel.com, alan.cox@intel.com, kevin.tian@intel.com, mika.westerberg@linux.intel.com, Ingo Molnar , Greg Kroah-Hartman , pengfei.xu@intel.com, Konrad Rzeszutek Wilk , Marek Szyprowski , Robin Murphy , Jonathan Corbet , Boris Ostrovsky , Juergen Gross , Stefano Stabellini , Steven Rostedt , iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Jacob Pan , Alan Cox , Mika Westerberg Subject: Re: [PATCH v6 5/8] iommu: Add bounce page APIs To: Christoph Hellwig References: <20190730045229.3826-1-baolu.lu@linux.intel.com> <20190730045229.3826-6-baolu.lu@linux.intel.com> <20190814083842.GB22669@8bytes.org> <445624e7-eb57-8089-8eb3-8687a65b1258@linux.intel.com> <20190815154845.GA18327@8bytes.org> <20190816044613.GC4093@lst.de> From: Lu Baolu Message-ID: <1eea1895-5063-ff33-1dd3-50371d03b3c8@linux.intel.com> Date: Sun, 18 Aug 2019 11:07:30 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190816044613.GC4093@lst.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On 8/16/19 12:46 PM, Christoph Hellwig wrote: > On Fri, Aug 16, 2019 at 10:45:13AM +0800, Lu Baolu wrote: >> Okay. I understand that adding these APIs in iommu.c is not a good idea. >> And, I also don't think merging the bounce buffer implementation into >> iommu_map() is feasible since iommu_map() is not DMA API centric. >> >> The bounce buffer implementation will eventually be part of DMA APIs >> defined in dma-iommu.c, but currently those APIs are not ready for x86 >> use yet. So I will put them in iommu/vt-d driver for this time being and >> will move them to dma-iommu.c later. > > I think they are more or less ready actually, we just need more people > reviewing the conversions. Tom just reposted the AMD one which will need > a few more reviews, and he has an older patchset for intel-iommu as well > that could use a some more eyes. > Good progress and thanks for the update. I prefer that we merge this patch series first since it addresses the real thunderbolt vulnerability. Best regards, Lu Baolu