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=-0.3 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 E7D22C433DF for ; Thu, 21 May 2020 12:41:54 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 A9C802070A for ; Thu, 21 May 2020 12:41:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="i2Ww6kFv" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A9C802070A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:49992 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jbkWH-0000dD-S4 for qemu-devel@archiver.kernel.org; Thu, 21 May 2020 08:41:53 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50044) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jbkV5-0007yM-5P for qemu-devel@nongnu.org; Thu, 21 May 2020 08:40:39 -0400 Received: from mail-wm1-x341.google.com ([2a00:1450:4864:20::341]:54494) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jbkV4-0003wc-7y for qemu-devel@nongnu.org; Thu, 21 May 2020 08:40:38 -0400 Received: by mail-wm1-x341.google.com with SMTP id h4so5446857wmb.4 for ; Thu, 21 May 2020 05:40:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=Hvt6RTJwycdAI9QOA3z60jUzhhWLiWgiROjYhBDE4m4=; b=i2Ww6kFvEkPqK8rC/FZYkrE0Gw7QtkY6Oa/jHjypaNG3mh4x4SvBtilpwJulWT/+6v R0BODbE7SQA5Ij5Hs7ZpBd/z8TlczEiYgI5k8Dy8PCx+0mrz4yQQj/zU4lwcrQQr8blK UA3XEQhSJqWSKCg8OWjB20C66qoyDqKybdHmL7feDxTeM93v3cL++P2NJ3rYgxp8QLNp vJSJEQLMG6HTHuOXi/iTjOgZfd3UlpgodhrkGyPr16xLJEgf6f2b3PSHJLr5EOe5JKKr 7/kOit/WY5sc6JkYJnEGo4cUqa53aPY5d5YdHIwQAiX3J6OPscvOJ7J/BeBuopR4oZLQ RoxA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=Hvt6RTJwycdAI9QOA3z60jUzhhWLiWgiROjYhBDE4m4=; b=QqJVjIsY39CiBU63Sa/u3GIpcSd3yaxyGmX/qjSj27zFdGJxHjHSelLmsbX4N1j7De s7zshoeEL5ufDxuGE/uUmaNIcED49cc+0vQEm2gwQ7TEawoAv5MLMTBq2drjH812Lg+0 hsZ24H04KQOy61P59KhQrmY8mAiJeg/8E1ylxlm97pAz2sUerIS8EA0IxVSqVvF1+EIX tSW+eWuMRvbqq6NMs5ZAWEaaAtRoNetsNJe61Ie+fRrEVdUHvc77MjIHiNwUafVGbvOK 6CfXZ8HN+7vnlmqG+UTYHXx6KMY4uxKHirMv9kfGlcCwl1pT1raVQp/icb7ieE/b/0wS NgwQ== X-Gm-Message-State: AOAM531+plwVgvCfewGE1sguriujWCtbpVFC2+n3dEpdR92LlLULEopG ifOnA9oc4f1tbp1L1npEPls= X-Google-Smtp-Source: ABdhPJyordx60K/PcwjmRMf2Z2ocOTc05AKjFirDBIKKIs2w9FNcHR423gCFXYxtD1gXrgn7aS7zqA== X-Received: by 2002:a7b:c4cc:: with SMTP id g12mr8638009wmk.168.1590064835367; Thu, 21 May 2020 05:40:35 -0700 (PDT) Received: from localhost ([51.15.41.238]) by smtp.gmail.com with ESMTPSA id a21sm6258163wmm.7.2020.05.21.05.40.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 May 2020 05:40:34 -0700 (PDT) Date: Thu, 21 May 2020 13:40:32 +0100 From: Stefan Hajnoczi To: Cindy Lu Subject: Re: [RFC v2 5/9] vhost-vdpa: implement vhost-vdpa backend Message-ID: <20200521124032.GH251811@stefanha-x1.localdomain> References: <20200508163218.22592-1-lulu@redhat.com> <20200508163218.22592-6-lulu@redhat.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="7J16OGEJ/mt06A90" Content-Disposition: inline In-Reply-To: <20200508163218.22592-6-lulu@redhat.com> Received-SPF: pass client-ip=2a00:1450:4864:20::341; envelope-from=stefanha@gmail.com; helo=mail-wm1-x341.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: rdunlap@infradead.org, mst@redhat.com, mhabets@solarflare.com, qemu-devel@nongnu.org, rob.miller@broadcom.com, saugatm@xilinx.com, armbru@redhat.com, hch@infradead.org, eperezma@redhat.com, jgg@mellanox.com, jasowang@redhat.com, shahafs@mellanox.com, kevin.tian@intel.com, parav@mellanox.com, vmireyno@marvell.com, cunming.liang@intel.com, gdawar@xilinx.com, jiri@mellanox.com, xiao.w.wang@intel.com, stefanha@redhat.com, zhihong.wang@intel.com, maxime.coquelin@redhat.com, Tiwei Bie , aadam@redhat.com, cohuck@redhat.com, hanand@xilinx.com, lingshan.zhu@intel.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --7J16OGEJ/mt06A90 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, May 09, 2020 at 12:32:14AM +0800, Cindy Lu wrote: > From: Tiwei Bie >=20 > Currently we have 2 types of vhost backends in QEMU: vhost kernel and > vhost-user. The above patch provides a generic device for vDPA purpose, > this vDPA device exposes to user space a non-vendor-specific configuration > interface for setting up a vhost HW accelerator, this patch set introduces > a third vhost backend called vhost-vdpa based on the vDPA interface. >=20 > Vhost-vdpa usage: >=20 > qemu-system-x86_64 -cpu host -enable-kvm \ > ...... > -netdev type=3Dvhost-vdpa,vhostdev=3D/dev/vhost-vdpa-id,id=3Dvhost-vdpa= 0 \ > -device virtio-net-pci,netdev=3Dvhost-vdpa0,page-per-vq=3Don \ I haven't looked at vDPA in depth. What is different here compared to the existing vhost-backend.c kernel backend? It seems to be making the same ioctls calls so I wonder if it makes sense to share the vhost-backend.c kernel code? Stefan --7J16OGEJ/mt06A90 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEhpWov9P5fNqsNXdanKSrs4Grc8gFAl7GdsAACgkQnKSrs4Gr c8jcBwf9GAzuGtYjtsoN0bsUmhqqVAE3se29unITj71yhW2TD22rVlAXxi+3rs9i ZSq+FIhaxh6FqzYQONFAlgmBMhcfmyPDvmtkF1/IOkWDWi+iHLm7llF0yEMq3U7O np63fQrF2JPTUrp6xzEFEcyHRwuRwoOFz0DylVcVpwjSAfj23gu+uq19JBs7HsLl U2OvcTWD3mt0u/DMqY1tSDU+UQ31EGyskoPdLySImU8BhB7kCbFhVubkH9ECBxQ0 WF/nhZ1iPU/U++muk2t77rYL+J53ot+SCMCBT8ueYXOTyx0tJa0rokWiuMAZz00Z DauAPVEG01dPgGpQnLruAqPyZgVSyA== =0uyc -----END PGP SIGNATURE----- --7J16OGEJ/mt06A90--