From: "Michael S. Tsirkin" <mst@redhat.com>
To: Jason Wang <jasowang@redhat.com>
Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
intel-gfx@lists.freedesktop.org,
intel-gvt-dev@lists.freedesktop.org, kwankhede@nvidia.com,
alex.williamson@redhat.com, tiwei.bie@intel.com,
virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org, cohuck@redhat.com,
maxime.coquelin@redhat.com, cunming.liang@intel.com,
zhihong.wang@intel.com, rob.miller@broadcom.com,
xiao.w.wang@intel.com, haotian.wang@sifive.com,
zhenyuw@linux.intel.com, zhi.a.wang@intel.com,
jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com,
rodrigo.vivi@intel.com, airlied@linux.ie, daniel@ffwll.ch,
farman@linux.ibm.com, pasic@linux.ibm.com, sebott@linux.ibm.com,
oberpar@linux.ibm.com, heiko.carstens@de.ibm.com,
gor@linux.ibm.com, borntraeger@de.ibm.com,
akrowiak@linux.ibm.com, pmorel@linux.ibm.com,
freude@linux.ibm.com, lingshan.zhu@intel.com, idos@mellanox.com,
eperezma@redhat.com, lulu@redhat.com
Subject: Re: [RFC PATCH V2 0/6] mdev based hardware virtio offloading support
Date: Mon, 23 Sep 2019 08:21:34 -0400 [thread overview]
Message-ID: <20190923074913-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <20190920082050.19352-1-jasowang@redhat.com>
On Fri, Sep 20, 2019 at 04:20:44PM +0800, Jason Wang wrote:
> Hi all:
>
> There are hardware that can do virtio datapath offloading while having
> its own control path. This path tries to implement a mdev based
> unified API to support using kernel virtio driver to drive those
> devices. This is done by introducing a new mdev transport for virtio
> (virtio_mdev) and register itself as a new kind of mdev driver. Then
> it provides a unified way for kernel virtio driver to talk with mdev
> device implementation.
This is actually simple enough that I'm inclined to just
put this into linux-next.
This mixes virtio and vfio so the code can thinkably
be merged through either tree.
Alex, any strong opinions on any of this?
> Though the series only contain kernel driver support, the goal is to
> make the transport generic enough to support userspace drivers. This
> means vhost-mdev[1] could be built on top as well by resuing the
> transport.
>
> A sample driver is also implemented which simulate a virito-net
> loopback ethernet device on top of vringh + workqueue. This could be
> used as a reference implementation for real hardware driver.
>
> Consider mdev framework only support VFIO device and driver right now,
> this series also extend it to support other types. This is done
> through introducing class id to the device and pairing it with
> id_talbe claimed by the driver. On top, this seris also decouple
> device specific parents ops out of the common ones.
>
> Pktgen test was done with virito-net + mvnet loop back device.
>
> Please review.
>
> Changes from V1:
>
> - rename device id to class id
> - add docs for class id and device specific ops (device_ops)
> - split device_ops into seperate headers
> - drop the mdev_set_dma_ops()
> - use device_ops to implement the transport API, then it's not a part
> of UAPI any more
> - use GFP_ATOMIC in mvnet sample device and other tweaks
> - set_vring_base/get_vring_base support for mvnet device
>
> Jason Wang (6):
> mdev: class id support
> mdev: introduce device specific ops
> mdev: introduce virtio device and its device ops
> virtio: introudce a mdev based transport
> vringh: fix copy direction of vringh_iov_push_kern()
> docs: Sample driver to demonstrate how to implement virtio-mdev
> framework
>
> .../driver-api/vfio-mediated-device.rst | 11 +-
> drivers/gpu/drm/i915/gvt/kvmgt.c | 17 +-
> drivers/s390/cio/vfio_ccw_ops.c | 17 +-
> drivers/s390/crypto/vfio_ap_ops.c | 14 +-
> drivers/vfio/mdev/Kconfig | 7 +
> drivers/vfio/mdev/Makefile | 1 +
> drivers/vfio/mdev/mdev_core.c | 21 +-
> drivers/vfio/mdev/mdev_driver.c | 14 +
> drivers/vfio/mdev/mdev_private.h | 1 +
> drivers/vfio/mdev/vfio_mdev.c | 37 +-
> drivers/vfio/mdev/virtio_mdev.c | 418 +++++++++++
> drivers/vhost/vringh.c | 8 +-
> include/linux/mdev.h | 46 +-
> include/linux/mod_devicetable.h | 8 +
> include/linux/vfio_mdev.h | 50 ++
> include/linux/virtio_mdev.h | 141 ++++
> samples/Kconfig | 7 +
> samples/vfio-mdev/Makefile | 1 +
> samples/vfio-mdev/mbochs.c | 19 +-
> samples/vfio-mdev/mdpy.c | 19 +-
> samples/vfio-mdev/mtty.c | 17 +-
> samples/vfio-mdev/mvnet.c | 688 ++++++++++++++++++
> 22 files changed, 1473 insertions(+), 89 deletions(-)
> create mode 100644 drivers/vfio/mdev/virtio_mdev.c
> create mode 100644 include/linux/vfio_mdev.h
> create mode 100644 include/linux/virtio_mdev.h
> create mode 100644 samples/vfio-mdev/mvnet.c
>
> --
> 2.19.1
prev parent reply other threads:[~2019-09-23 12:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-20 8:20 [RFC PATCH V2 0/6] mdev based hardware virtio offloading support Jason Wang
2019-09-20 8:20 ` [RFC PATCH V2 1/6] mdev: class id support Jason Wang
2019-09-20 8:20 ` [RFC PATCH V2 2/6] mdev: introduce device specific ops Jason Wang
2019-09-20 8:20 ` [RFC PATCH V2 3/6] mdev: introduce virtio device and its device ops Jason Wang
2019-09-20 8:20 ` [RFC PATCH V2 4/6] virtio: introudce a mdev based transport Jason Wang
2019-09-20 8:20 ` [RFC PATCH V2 5/6] vringh: fix copy direction of vringh_iov_push_kern() Jason Wang
2019-09-20 8:20 ` [RFC PATCH V2 6/6] docs: Sample driver to demonstrate how to implement virtio-mdev framework Jason Wang
2019-09-23 1:06 ` [RFC PATCH V2 0/6] mdev based hardware virtio offloading support Jason Wang
2019-09-23 12:21 ` Michael S. Tsirkin [this message]
Reply instructions:
You may reply publicly 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=20190923074913-mutt-send-email-mst@kernel.org \
--to=mst@redhat.com \
--cc=airlied@linux.ie \
--cc=akrowiak@linux.ibm.com \
--cc=alex.williamson@redhat.com \
--cc=borntraeger@de.ibm.com \
--cc=cohuck@redhat.com \
--cc=cunming.liang@intel.com \
--cc=daniel@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=eperezma@redhat.com \
--cc=farman@linux.ibm.com \
--cc=freude@linux.ibm.com \
--cc=gor@linux.ibm.com \
--cc=haotian.wang@sifive.com \
--cc=heiko.carstens@de.ibm.com \
--cc=idos@mellanox.com \
--cc=intel-gfx@lists.freedesktop.org \
--cc=intel-gvt-dev@lists.freedesktop.org \
--cc=jani.nikula@linux.intel.com \
--cc=jasowang@redhat.com \
--cc=joonas.lahtinen@linux.intel.com \
--cc=kvm@vger.kernel.org \
--cc=kwankhede@nvidia.com \
--cc=lingshan.zhu@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-s390@vger.kernel.org \
--cc=lulu@redhat.com \
--cc=maxime.coquelin@redhat.com \
--cc=netdev@vger.kernel.org \
--cc=oberpar@linux.ibm.com \
--cc=pasic@linux.ibm.com \
--cc=pmorel@linux.ibm.com \
--cc=rob.miller@broadcom.com \
--cc=rodrigo.vivi@intel.com \
--cc=sebott@linux.ibm.com \
--cc=tiwei.bie@intel.com \
--cc=virtualization@lists.linux-foundation.org \
--cc=xiao.w.wang@intel.com \
--cc=zhenyuw@linux.intel.com \
--cc=zhi.a.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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).