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 862D2C76195 for ; Thu, 18 Jul 2019 10:31:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6926520880 for ; Thu, 18 Jul 2019 10:31:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389786AbfGRKbz (ORCPT ); Thu, 18 Jul 2019 06:31:55 -0400 Received: from mx1.redhat.com ([209.132.183.28]:50538 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726482AbfGRKby (ORCPT ); Thu, 18 Jul 2019 06:31:54 -0400 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 mx1.redhat.com (Postfix) with ESMTPS id AB7823084029; Thu, 18 Jul 2019 10:31:54 +0000 (UTC) Received: from [10.72.12.199] (ovpn-12-199.pek2.redhat.com [10.72.12.199]) by smtp.corp.redhat.com (Postfix) with ESMTP id 814325D6A9; Thu, 18 Jul 2019 10:31:42 +0000 (UTC) Subject: Re: [RFC v2] vhost: introduce mdev based hardware vhost backend From: Jason Wang To: Tiwei Bie Cc: Alex Williamson , mst@redhat.com, maxime.coquelin@redhat.com, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, dan.daly@intel.com, cunming.liang@intel.com, zhihong.wang@intel.com, idos@mellanox.com, Rob Miller , Ariel Adam References: <20190703115245.GA22374@___> <64833f91-02cd-7143-f12e-56ab93b2418d@redhat.com> <20190703130817.GA1978@___> <20190704062134.GA21116@___> <20190705084946.67b8f9f5@x1.home> <20190708061625.GA15936@___> <20190709063317.GA29300@___> <9aafdc4d-0203-b96e-c205-043db132eb06@redhat.com> <20190710062233.GA16212@___> <1b49aa84-2c1f-eec2-2809-711e1f2dd7de@redhat.com> Message-ID: <90e6a722-ce7b-2ab3-0d2d-19b2ca09f2d1@redhat.com> Date: Thu, 18 Jul 2019 18:31:36 +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: <1b49aa84-2c1f-eec2-2809-711e1f2dd7de@redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.40]); Thu, 18 Jul 2019 10:31:54 +0000 (UTC) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 2019/7/10 下午3:22, Jason Wang wrote: >> Yeah, that's a major concern. If it's true, is it something >> that's not acceptable? > > > I think not, but I don't know if any other one that care this. > > >> >>> And I do see some new RFC for VFIO to add more DMA API. >> Is there any pointers? > > > I don't remember the details, but it should be something related to > SVA support in recent intel IOMMU. E.g this series: https://www.spinics.net/lists/iommu/msg37146.html Thanks