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 508E0C433F5 for ; Wed, 13 Apr 2022 16:06:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236771AbiDMQI1 (ORCPT ); Wed, 13 Apr 2022 12:08:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36390 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235176AbiDMQI1 (ORCPT ); Wed, 13 Apr 2022 12:08:27 -0400 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D09F96472D; Wed, 13 Apr 2022 09:06:05 -0700 (PDT) Received: by verein.lst.de (Postfix, from userid 2407) id 720B768BEB; Wed, 13 Apr 2022 18:06:01 +0200 (CEST) Date: Wed, 13 Apr 2022 18:06:01 +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: <20220413160601.GA29631@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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220413113952.GN2120790@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 08:39:52AM -0300, Jason Gunthorpe wrote: > I already looked into that for a while, it is a real mess too because > of how the notifiers are used by the current drivers, eg gvt assumes > the notifier is called during its open_device callback to setup its > kvm. gvt very much expects kvm to be set before open and thus get the cachup notifier, yes. And given that this is how qemu uses the ioctl I think we can actually simplify this further and require vfio_group_set_kvm to be called before open for s390/ap as well and do away with this whole mess. > For this series I prefer to leave it alone Ok, let's do it one step at a time. 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 D6EACC433EF for ; Wed, 13 Apr 2022 16:06:07 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 43B8910E436; Wed, 13 Apr 2022 16:06:07 +0000 (UTC) Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2FC4B10E401; Wed, 13 Apr 2022 16:06:05 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 720B768BEB; Wed, 13 Apr 2022 18:06:01 +0200 (CEST) Date: Wed, 13 Apr 2022 18:06:01 +0200 From: Christoph Hellwig To: Jason Gunthorpe Message-ID: <20220413160601.GA29631@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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220413113952.GN2120790@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 08:39:52AM -0300, Jason Gunthorpe wrote: > I already looked into that for a while, it is a real mess too because > of how the notifiers are used by the current drivers, eg gvt assumes > the notifier is called during its open_device callback to setup its > kvm. gvt very much expects kvm to be set before open and thus get the cachup notifier, yes. And given that this is how qemu uses the ioctl I think we can actually simplify this further and require vfio_group_set_kvm to be called before open for s390/ap as well and do away with this whole mess. > For this series I prefer to leave it alone Ok, let's do it one step at a time.