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_2 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 6BD61C33CA4 for ; Fri, 10 Jan 2020 10:08:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4C2692082E for ; Fri, 10 Jan 2020 10:08:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727489AbgAJKIW convert rfc822-to-8bit (ORCPT ); Fri, 10 Jan 2020 05:08:22 -0500 Received: from lhrrgout.huawei.com ([185.176.76.210]:2249 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727540AbgAJKIW (ORCPT ); Fri, 10 Jan 2020 05:08:22 -0500 Received: from lhreml701-cah.china.huawei.com (unknown [172.18.7.106]) by Forcepoint Email with ESMTP id 0506D60485352686A595; Fri, 10 Jan 2020 10:08:21 +0000 (GMT) Received: from lhreml710-chm.china.huawei.com (10.201.108.61) by lhreml701-cah.china.huawei.com (10.201.108.42) with Microsoft SMTP Server (TLS) id 14.3.408.0; Fri, 10 Jan 2020 10:08:20 +0000 Received: from localhost (10.202.226.57) by lhreml710-chm.china.huawei.com (10.201.108.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Fri, 10 Jan 2020 10:08:20 +0000 Date: Fri, 10 Jan 2020 10:08:18 +0000 From: Jonathan Cameron To: zhangfei CC: Greg Kroah-Hartman , Arnd Bergmann , Herbert Xu , , jean-philippe , "Jerome Glisse" , , , , Wangzhou , "haojian . zhuang" , , , , , , Dave Jiang Subject: Re: [PATCH v10 0/4] Add uacce module for Accelerator Message-ID: <20200110100818.0000151a@Huawei.com> In-Reply-To: <9b87edca-dd4e-3fe2-5acd-11f7381593ed@linaro.org> References: <1576465697-27946-1-git-send-email-zhangfei.gao@linaro.org> <20200109174952.000051e1@Huawei.com> <9b87edca-dd4e-3fe2-5acd-11f7381593ed@linaro.org> Organization: Huawei Technologies Research and Development (UK) Ltd. X-Mailer: Claws Mail 3.17.4 (GTK+ 2.24.32; i686-w64-mingw32) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8BIT X-Originating-IP: [10.202.226.57] X-ClientProxiedBy: lhreml725-chm.china.huawei.com (10.201.108.76) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 10 Jan 2020 15:03:25 +0800 zhangfei wrote: > On 2020/1/10 上午1:49, Jonathan Cameron wrote: > > On Mon, 16 Dec 2019 11:08:13 +0800 > > Zhangfei Gao wrote: > > > >> Uacce (Unified/User-space-access-intended Accelerator Framework) targets to > >> provide Shared Virtual Addressing (SVA) between accelerators and processes. > >> So accelerator can access any data structure of the main cpu. > >> This differs from the data sharing between cpu and io device, which share > >> data content rather than address. > >> Because of unified address, hardware and user space of process can share > >> the same virtual address in the communication. > >> > >> Uacce is intended to be used with Jean Philippe Brucker's SVA > >> patchset[1], which enables IO side page fault and PASID support. > >> We have keep verifying with Jean's sva patchset [2] > >> We also keep verifying with Eric's SMMUv3 Nested Stage patches [3] > > Hi Zhangfei Gao, > > > > Just to check my understanding... > > > > This patch set is not dependent on either 2 or 3? > > > > To use it on our hardware, we need 2, but the interfaces used are already > > upstream, so this could move forwards in parallel. > > > > > Yes, > patch 1, 2 is for uacce. > patch 3, 4 is an example using uacce, which happen to be crypto. Sorry, I wasn't clear enough. Question is whether we need Jean's sva patch set [2] to merge this? > > Thanks