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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7C716C4332F for ; Wed, 13 Apr 2022 16:29:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235045AbiDMQcN (ORCPT ); Wed, 13 Apr 2022 12:32:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55178 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231166AbiDMQcM (ORCPT ); Wed, 13 Apr 2022 12:32:12 -0400 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D01E93FBF2; Wed, 13 Apr 2022 09:29:50 -0700 (PDT) Received: by verein.lst.de (Postfix, from userid 2407) id 8A25968AFE; Wed, 13 Apr 2022 18:29:46 +0200 (CEST) Date: Wed, 13 Apr 2022 18:29:46 +0200 From: Christoph Hellwig To: Jason Gunthorpe Cc: Christoph Hellwig , Alexander Gordeev , David Airlie , Tony Krowiak , Alex Williamson , Christian Borntraeger , Cornelia Huck , Jonathan Corbet , Daniel Vetter , dri-devel@lists.freedesktop.org, Eric Farman , Harald Freudenberger , Vasily Gorbik , Heiko Carstens , intel-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, Jani Nikula , Jason Herne , Joonas Lahtinen , kvm@vger.kernel.org, Kirti Wankhede , linux-doc@vger.kernel.org, linux-s390@vger.kernel.org, Matthew Rosato , Peter Oberparleiter , Halil Pasic , Rodrigo Vivi , Sven Schnelle , Tvrtko Ursulin , Vineeth Vijayan , Zhenyu Wang , Zhi Wang , "Tian, Kevin" , "Liu, Yi L" Subject: Re: [PATCH 1/9] vfio: Make vfio_(un)register_notifier accept a vfio_device Message-ID: <20220413162946.GB31053@lst.de> References: <0-v1-a8faf768d202+125dd-vfio_mdev_no_group_jgg@nvidia.com> <1-v1-a8faf768d202+125dd-vfio_mdev_no_group_jgg@nvidia.com> <20220413055524.GB32092@lst.de> <20220413113952.GN2120790@nvidia.com> <20220413160601.GA29631@lst.de> <20220413161814.GS2120790@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220413161814.GS2120790@nvidia.com> User-Agent: Mutt/1.5.17 (2007-11-01) Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org On Wed, Apr 13, 2022 at 01:18:14PM -0300, Jason Gunthorpe wrote: > Yeah, I was thinking about that too, but on the other hand I think it > is completely wrong that gvt requires kvm at all. A vfio_device is not > supposed to be tightly linked to KVM - the only exception possibly > being s390.. So i915/gvt uses it for: - poking into the KVM GFN translations - using the KVM page track notifier No idea how these could be solved in a more generic way. 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 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 60E9EC433F5 for ; Wed, 13 Apr 2022 16:29:51 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EA37310E121; Wed, 13 Apr 2022 16:29:50 +0000 (UTC) Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3A87A10E121; Wed, 13 Apr 2022 16:29:50 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 8A25968AFE; Wed, 13 Apr 2022 18:29:46 +0200 (CEST) Date: Wed, 13 Apr 2022 18:29:46 +0200 From: Christoph Hellwig To: Jason Gunthorpe Message-ID: <20220413162946.GB31053@lst.de> References: <0-v1-a8faf768d202+125dd-vfio_mdev_no_group_jgg@nvidia.com> <1-v1-a8faf768d202+125dd-vfio_mdev_no_group_jgg@nvidia.com> <20220413055524.GB32092@lst.de> <20220413113952.GN2120790@nvidia.com> <20220413160601.GA29631@lst.de> <20220413161814.GS2120790@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220413161814.GS2120790@nvidia.com> User-Agent: Mutt/1.5.17 (2007-11-01) Subject: Re: [Intel-gfx] [PATCH 1/9] vfio: Make vfio_(un)register_notifier accept a vfio_device X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, linux-doc@vger.kernel.org, David Airlie , dri-devel@lists.freedesktop.org, Kirti Wankhede , Vineeth Vijayan , Alexander Gordeev , Christoph Hellwig , linux-s390@vger.kernel.org, "Liu, Yi L" , Matthew Rosato , Jonathan Corbet , Halil Pasic , Christian Borntraeger , intel-gfx@lists.freedesktop.org, Jason Herne , Eric Farman , Vasily Gorbik , Heiko Carstens , Harald Freudenberger , Rodrigo Vivi , intel-gvt-dev@lists.freedesktop.org, Tony Krowiak , Cornelia Huck , Peter Oberparleiter , Sven Schnelle Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Wed, Apr 13, 2022 at 01:18:14PM -0300, Jason Gunthorpe wrote: > Yeah, I was thinking about that too, but on the other hand I think it > is completely wrong that gvt requires kvm at all. A vfio_device is not > supposed to be tightly linked to KVM - the only exception possibly > being s390.. So i915/gvt uses it for: - poking into the KVM GFN translations - using the KVM page track notifier No idea how these could be solved in a more generic way.