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=-5.2 required=3.0 tests=BAYES_00, 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 52530C2D0A3 for ; Tue, 3 Nov 2020 16:55:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F416C20756 for ; Tue, 3 Nov 2020 16:55:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727706AbgKCQzn (ORCPT ); Tue, 3 Nov 2020 11:55:43 -0500 Received: from 8bytes.org ([81.169.241.247]:39290 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727323AbgKCQzm (ORCPT ); Tue, 3 Nov 2020 11:55:42 -0500 Received: by theia.8bytes.org (Postfix, from userid 1000) id 871D45EA; Tue, 3 Nov 2020 17:55:41 +0100 (CET) Date: Tue, 3 Nov 2020 17:55:40 +0100 From: "joro@8bytes.org" To: Jason Gunthorpe Cc: "Tian, Kevin" , Jason Wang , "Liu, Yi L" , "alex.williamson@redhat.com" , "eric.auger@redhat.com" , "baolu.lu@linux.intel.com" , "jacob.jun.pan@linux.intel.com" , "Raj, Ashok" , "Tian, Jun J" , "Sun, Yi Y" , "jean-philippe@linaro.org" , "peterx@redhat.com" , "Wu, Hao" , "stefanha@gmail.com" , "iommu@lists.linux-foundation.org" , "kvm@vger.kernel.org" , "Michael S. Tsirkin" Subject: Re: (proposal) RE: [PATCH v7 00/16] vfio: expose virtual Shared Virtual Addressing to VMs Message-ID: <20201103165539.GN22888@8bytes.org> References: <20201103095208.GA22888@8bytes.org> <20201103125643.GN2620339@nvidia.com> <20201103131852.GE22888@8bytes.org> <20201103132335.GO2620339@nvidia.com> <20201103140318.GL22888@8bytes.org> <20201103140642.GQ2620339@nvidia.com> <20201103143532.GM22888@8bytes.org> <20201103152223.GR2620339@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201103152223.GR2620339@nvidia.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Tue, Nov 03, 2020 at 11:22:23AM -0400, Jason Gunthorpe wrote: > This whole thread was brought up by IDXD which has a SVA driver and > now wants to add a vfio-mdev driver too. SVA devices that want to be > plugged into VMs are going to be common - this architecture that a SVA > driver cannot cover the kvm case seems problematic. Isn't that the same pattern as having separate drivers for VFs and the parent device in SR-IOV? Regards, Joerg