KVM Archive on lore.kernel.org
 help / color / Atom feed
From: Jason Gunthorpe <jgg@mellanox.com>
To: Jason Wang <jasowang@redhat.com>
Cc: "mst@redhat.com" <mst@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>,
	"kuba@kernel.org" <kuba@kernel.org>
Subject: Re: [PATCH 5/5] vdpasim: vDPA device simulator
Date: Fri, 17 Jan 2020 14:10:24 +0000
Message-ID: <20200117141021.GW20978@mellanox.com> (raw)
In-Reply-To: <aea2bff8-82c8-2c0f-19ee-e86db73e199f@redhat.com>

On Fri, Jan 17, 2020 at 05:32:39PM +0800, Jason Wang wrote:
> 
> On 2020/1/16 下午11:47, Jason Gunthorpe wrote:
> > On Thu, Jan 16, 2020 at 08:42:31PM +0800, Jason Wang wrote:
> > > This patch implements a software vDPA networking device. The datapath
> > > is implemented through vringh and workqueue. The device has an on-chip
> > > IOMMU which translates IOVA to PA. For kernel virtio drivers, vDPA
> > > simulator driver provides dma_ops. For vhost driers, set_map() methods
> > > of vdpa_config_ops is implemented to accept mappings from vhost.
> > > 
> > > A sysfs based management interface is implemented, devices are
> > > created and removed through:
> > > 
> > > /sys/devices/virtual/vdpa_simulator/netdev/{create|remove}
> > This is very gross, creating a class just to get a create/remove and
> > then not using the class for anything else? Yuk.
> 
> 
> It includes more information, e.g the devices and the link from vdpa_sim
> device and vdpa device.

I feel like regardless of how the device is created there should be a
consistent virtio centric management for post-creation tasks, such as
introspection and destruction

A virto struct device should already have back pointers to it's parent
device, which should be enough to discover the vdpa_sim, none of the
extra sysfs munging should be needed.

> > > Netlink based lifecycle management could be implemented for vDPA
> > > simulator as well.
> > This is just begging for a netlink based approach.
> > 
> > Certainly netlink driven removal should be an agreeable standard for
> > all devices, I think.
> 
> 
> Well, I think Parav had some proposals during the discussion of mdev
> approach. But I'm not sure if he had any RFC codes for me to integrate it
> into vdpasim.
>
> Or do you want me to propose the netlink API? If yes, would you prefer to a
> new virtio dedicated one or be a subset of devlink?

Well, lets see what feed back Parav has

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
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 [this message]
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

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200117141021.GW20978@mellanox.com \
    --to=jgg@mellanox.com \
    --cc=aadam@redhat.com \
    --cc=cunming.liang@intel.com \
    --cc=eperezma@redhat.com \
    --cc=hanand@xilinx.com \
    --cc=haotian.wang@sifive.com \
    --cc=hch@infradead.org \
    --cc=jakub.kicinski@netronome.com \
    --cc=jasowang@redhat.com \
    --cc=jiri@mellanox.com \
    --cc=kevin.tian@intel.com \
    --cc=kuba@kernel.org \
    --cc=kvm@vger.kernel.org \
    --cc=lingshan.zhu@intel.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=lulu@redhat.com \
    --cc=maxime.coquelin@redhat.com \
    --cc=mhabets@solarflare.com \
    --cc=mst@redhat.com \
    --cc=netdev@vger.kernel.org \
    --cc=parav@mellanox.com \
    --cc=rdunlap@infradead.org \
    --cc=rob.miller@broadcom.com \
    --cc=shahafs@mellanox.com \
    --cc=stefanha@redhat.com \
    --cc=tiwei.bie@intel.com \
    --cc=virtualization@lists.linux-foundation.org \
    --cc=xiao.w.wang@intel.com \
    --cc=zhihong.wang@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

KVM Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/kvm/0 kvm/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 kvm kvm/ https://lore.kernel.org/kvm \
		kvm@vger.kernel.org
	public-inbox-index kvm

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.kvm


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git