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 98BFCCA9EC3 for ; Thu, 31 Oct 2019 07:57:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 730C72080F for ; Thu, 31 Oct 2019 07:57:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726951AbfJaH5s (ORCPT ); Thu, 31 Oct 2019 03:57:48 -0400 Received: from mga06.intel.com ([134.134.136.31]:64655 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726769AbfJaH5r (ORCPT ); Thu, 31 Oct 2019 03:57:47 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 31 Oct 2019 00:57:47 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,250,1569308400"; d="scan'208";a="206036015" Received: from lingshan-mobl5.ccr.corp.intel.com (HELO [10.238.129.48]) ([10.238.129.48]) by FMSMGA003.fm.intel.com with ESMTP; 31 Oct 2019 00:57:39 -0700 Subject: Re: [PATCH V6 6/6] docs: sample driver to demonstrate how to implement virtio-mdev framework To: Christoph Hellwig , Jason Wang Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, kwankhede@nvidia.com, alex.williamson@redhat.com, mst@redhat.com, tiwei.bie@intel.com, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, cohuck@redhat.com, maxime.coquelin@redhat.com, cunming.liang@intel.com, zhihong.wang@intel.com, rob.miller@broadcom.com, xiao.w.wang@intel.com, haotian.wang@sifive.com, zhenyuw@linux.intel.com, zhi.a.wang@intel.com, jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, rodrigo.vivi@intel.com, airlied@linux.ie, daniel@ffwll.ch, farman@linux.ibm.com, pasic@linux.ibm.com, sebott@linux.ibm.com, oberpar@linux.ibm.com, heiko.carstens@de.ibm.com, gor@linux.ibm.com, borntraeger@de.ibm.com, akrowiak@linux.ibm.com, freude@linux.ibm.com, idos@mellanox.com, eperezma@redhat.com, lulu@redhat.com, parav@mellanox.com, christophe.de.dinechin@gmail.com, kevin.tian@intel.com, stefanha@redhat.com References: <20191030064444.21166-1-jasowang@redhat.com> <20191030064444.21166-7-jasowang@redhat.com> <20191030212312.GA4251@infradead.org> From: "Zhu, Lingshan" Message-ID: <1592d723-a580-8614-3fb4-88560a06cdc1@intel.com> Date: Thu, 31 Oct 2019 15:57:38 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.1.2 MIME-Version: 1.0 In-Reply-To: <20191030212312.GA4251@infradead.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/31/2019 5:23 AM, Christoph Hellwig wrote: > On Wed, Oct 30, 2019 at 02:44:44PM +0800, Jason Wang wrote: >> This sample driver creates mdev device that simulate virtio net device >> over virtio mdev transport. The device is implemented through vringh >> and workqueue. A device specific dma ops is to make sure HVA is used >> directly as the IOVA. This should be sufficient for kernel virtio >> driver to work. >> >> Only 'virtio' type is supported right now. I plan to add 'vhost' type >> on top which requires some virtual IOMMU implemented in this sample >> driver. > Can we please submit a real driver for it? A more or less useless > sample driver doesn't really qualify for our normal kernel requirements > that infrastructure should have a real user. Hello Christoph, I am working on a real hardware driver for it, it's called IFC, I have posted RFC V1 and will post RFC V2 soon. Thanks, BR Zhu Lingshan