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From: Jason Gunthorpe <jgg@mellanox.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"virtualization@lists.linux-foundation.org" 
	<virtualization@lists.linux-foundation.org>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"tiwei.bie@intel.com" <tiwei.bie@intel.com>,
	"maxime.coquelin@redhat.com" <maxime.coquelin@redhat.com>,
	"cunming.liang@intel.com" <cunming.liang@intel.com>,
	"zhihong.wang@intel.com" <zhihong.wang@intel.com>,
	"rob.miller@broadcom.com" <rob.miller@broadcom.com>,
	"xiao.w.wang@intel.com" <xiao.w.wang@intel.com>,
	"haotian.wang@sifive.com" <haotian.wang@sifive.com>,
	"lingshan.zhu@intel.com" <lingshan.zhu@intel.com>,
	"eperezma@redhat.com" <eperezma@redhat.com>,
	"lulu@redhat.com" <lulu@redhat.com>,
	Parav Pandit <parav@mellanox.com>,
	"kevin.tian@intel.com" <kevin.tian@intel.com>,
	"stefanha@redhat.com" <stefanha@redhat.com>,
	"rdunlap@infradead.org" <rdunlap@infradead.org>,
	"hch@infradead.org" <hch@infradead.org>,
	"aadam@redhat.com" <aadam@redhat.com>,
	"jakub.kicinski@netronome.com" <jakub.kicinski@netronome.com>,
	Jiri Pirko <jiri@mellanox.com>,
	Shahaf Shuler <shahafs@mellanox.com>,
	"hanand@xilinx.com" <hanand@xilinx.com>,
	"mhabets@solarflare.com" <mhabets@solarflare.com>
Subject: Re: [PATCH 3/5] vDPA: introduce vDPA bus
Date: Tue, 21 Jan 2020 14:12:05 +0000
Message-ID: <20200121141200.GC12330@mellanox.com> (raw)
In-Reply-To: <20200120164916-mutt-send-email-mst@kernel.org>

On Mon, Jan 20, 2020 at 04:56:06PM -0500, Michael S. Tsirkin wrote:
> > For vfio? vfio is the only thing I am aware doing
> > that, and this is not vfio..
> 
> vfio is not doing anything. anyone can use a combination
> of unbind and driver_override to attach a driver to a device.
> 
> It's not a great interface but it's there without any code,
> and it will stay there without maintainance overhead
> if we later add a nicer one.

Well, it is not a great interface, and it is only really used in
normal cases by vfio.

I don't think it is a good idea to design new subsystems with that
idea in mind, particularly since detatching the vdpa driver would not
trigger destruction of the underlying dynamic resource (ie the SF).

We need a way to trigger that destruction..

Jason 

  reply index

Thread overview: 76+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-16 12:42 [PATCH 0/5] vDPA support Jason Wang
2020-01-16 12:42 ` [PATCH 1/5] vhost: factor out IOTLB Jason Wang
2020-01-17  4:14   ` Randy Dunlap
2020-01-17  9:34     ` Jason Wang
2020-01-18  0:01   ` kbuild test robot
2020-01-18  0:40   ` kbuild test robot
2020-01-16 12:42 ` [PATCH 2/5] vringh: IOTLB support Jason Wang
2020-01-17 21:54   ` kbuild test robot
2020-01-17 22:33   ` kbuild test robot
2020-01-16 12:42 ` [PATCH 3/5] vDPA: introduce vDPA bus Jason Wang
2020-01-16 15:22   ` Jason Gunthorpe
2020-01-17  3:03     ` Jason Wang
2020-01-17 13:54       ` Jason Gunthorpe
2020-01-20  7:50         ` Jason Wang
2020-01-20 12:17         ` Michael S. Tsirkin
2020-01-20 17:50           ` Jason Gunthorpe
2020-01-20 21:56             ` Michael S. Tsirkin
2020-01-21 14:12               ` Jason Gunthorpe [this message]
2020-01-21 14:15                 ` Michael S. Tsirkin
2020-01-21 14:16                   ` Jason Gunthorpe
2020-01-21  8:40       ` Tian, Kevin
2020-01-21  9:41         ` Jason Wang
2020-01-17  4:16   ` Randy Dunlap
2020-01-17  9:34     ` Jason Wang
2020-01-17 12:13   ` Michael S. Tsirkin
2020-01-17 13:52     ` Jason Wang
     [not found]       ` <CAJPjb1+fG9L3=iKbV4Vn13VwaeDZZdcfBPvarogF_Nzhk+FnKg@mail.gmail.com>
2020-01-19  9:07         ` Shahaf Shuler
2020-01-19  9:59           ` Michael S. Tsirkin
2020-01-20  8:44             ` Jason Wang
2020-01-20 12:09               ` Michael S. Tsirkin
2020-01-21  3:32                 ` Jason Wang
2020-01-20  8:43           ` Jason Wang
2020-01-20 17:49             ` Jason Gunthorpe
2020-01-20 20:51               ` Shahaf Shuler
2020-01-20 21:25                 ` Michael S. Tsirkin
2020-01-20 21:47                   ` Shahaf Shuler
2020-01-20 21:59                     ` Michael S. Tsirkin
2020-01-21  6:01                       ` Shahaf Shuler
2020-01-21  7:57                         ` Jason Wang
2020-01-21 14:07                   ` Jason Gunthorpe
2020-01-21 14:16                     ` Michael S. Tsirkin
2020-01-20 21:48               ` Michael S. Tsirkin
2020-01-21  4:00               ` Jason Wang
2020-01-21  5:47                 ` Michael S. Tsirkin
2020-01-21  8:00                   ` Jason Wang
2020-01-21  8:15                     ` Michael S. Tsirkin
2020-01-21  8:35                       ` Jason Wang
2020-01-21 11:09                         ` Shahaf Shuler
2020-01-22  6:36                           ` Jason Wang
2020-01-21 14:05                       ` Jason Gunthorpe
2020-01-21 14:17                         ` Michael S. Tsirkin
2020-01-22  6:18                           ` Jason Wang
2020-01-20  8:19         ` Jason Wang
2020-01-16 12:42 ` [PATCH 4/5] virtio: introduce a vDPA based transport Jason Wang
2020-01-16 15:38   ` Jason Gunthorpe
2020-01-17  9:32     ` Jason Wang
2020-01-17 14:00       ` Jason Gunthorpe
2020-01-20  7:52         ` Jason Wang
2020-01-17  4:10   ` Randy Dunlap
2020-01-16 12:42 ` [PATCH 5/5] vdpasim: vDPA device simulator Jason Wang
2020-01-16 15:47   ` Jason Gunthorpe
2020-01-17  9:32     ` Jason Wang
2020-01-17 14:10       ` Jason Gunthorpe
2020-01-20  8:01         ` Jason Wang
2020-02-04  4:19         ` Jason Wang
2020-01-17  4:12   ` Randy Dunlap
2020-01-17  9:35     ` Jason Wang
2020-01-18 18:18   ` kbuild test robot
2020-01-28  3:32   ` Dan Carpenter
2020-02-04  4:07     ` Jason Wang
2020-02-04  8:21   ` Zhu Lingshan
2020-02-04  8:28     ` Jason Wang
2020-02-04 12:52       ` Jason Gunthorpe
2020-02-05  3:14         ` Jason Wang
2020-01-21  8:44 ` [PATCH 0/5] vDPA support Tian, Kevin
2020-01-21  9:39   ` Jason Wang

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