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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED 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 847F7C5DF63 for ; Wed, 6 Nov 2019 14:17:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5695620869 for ; Wed, 6 Nov 2019 14:17:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="K5C8nkI5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731852AbfKFORE (ORCPT ); Wed, 6 Nov 2019 09:17:04 -0500 Received: from us-smtp-1.mimecast.com ([207.211.31.81]:35729 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730577AbfKFORE (ORCPT ); Wed, 6 Nov 2019 09:17:04 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1573049823; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ER/WquWBpU7PunGVOI/swL9aOZ32qLf8hTv9Vd0HUN0=; b=K5C8nkI56OkAcoj9twh1LjAQV4fRlomAPzQEvTMAkaZJMTjsIC3gGXhwOERomTqWE9zDd4 2fYmRhI6Kb/dAWuaHtBlrkqUvXaxiPxvAttKWCLkDpaH1sNEQx8nVltqBrUdej2IO+3/zK lhJF7todK2to4K7dbs5zChnSCptTpGc= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-23-I-KaKfnbOz6RjNvb_LV7Ig-1; Wed, 06 Nov 2019 09:16:59 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A78B3477; Wed, 6 Nov 2019 14:16:55 +0000 (UTC) Received: from gondolin (dhcp-192-218.str.redhat.com [10.33.192.218]) by smtp.corp.redhat.com (Postfix) with ESMTP id BD5815D70D; Wed, 6 Nov 2019 14:16:37 +0000 (UTC) Date: Wed, 6 Nov 2019 15:16:35 +0100 From: Cornelia Huck To: 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, 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, lingshan.zhu@intel.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 Subject: Re: [PATCH V10 0/6] mdev based hardware virtio offloading support Message-ID: <20191106151635.0d1cb3bc.cohuck@redhat.com> In-Reply-To: <20191106133531.693-1-jasowang@redhat.com> References: <20191106133531.693-1-jasowang@redhat.com> Organization: Red Hat GmbH MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-MC-Unique: I-KaKfnbOz6RjNvb_LV7Ig-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Wed, 6 Nov 2019 21:35:25 +0800 Jason Wang wrote: > Hi all: >=20 > There are hardwares that can do virtio datapath offloading while > having its own control path. This path tries to implement a mdev based > unified API to support using kernel virtio driver to drive those > devices. This is done by introducing a new mdev transport for virtio > (virtio_mdev) and register itself as a new kind of mdev driver. Then > it provides a unified way for kernel virtio driver to talk with mdev > device implementation. >=20 > Though the series only contains kernel driver support, the goal is to > make the transport generic enough to support userspace drivers. This > means vhost-mdev[1] could be built on top as well by resuing the > transport. >=20 > A sample driver is also implemented which simulate a virito-net > loopback ethernet device on top of vringh + workqueue. This could be > used as a reference implementation for real hardware driver. >=20 > Also a real IFC VF driver was also posted here[2] which is a good > reference for vendors who is interested in their own virtio datapath > offloading product. >=20 > Consider mdev framework only support VFIO device and driver right now, > this series also extend it to support other types. This is done > through introducing class id to the device and pairing it with > id_talbe claimed by the driver. On top, this seris also decouple > device specific ops out of the common ones for implementing class > specific operations over mdev bus. >=20 > Pktgen test was done with virito-net + mvnet loop back device. >=20 > Please review. All looking good to me now. >=20 > [1] https://lkml.org/lkml/2019/11/5/424 > [2] https://lkml.org/lkml/2019/11/5/227