On Wed, Nov 06, 2019 at 12:03:12PM -0700, Alex Williamson wrote: > On Wed, 6 Nov 2019 11:56:46 +0800 > Jason Wang <jasowang@xxxxxxxxxx> wrote: > > > On 2019/11/6 上午1:58, Alex Williamson wrote: > > > On Tue, 5 Nov 2019 17:32:34 +0800 > > > Jason Wang <jasowang@xxxxxxxxxx> wrote: > > > > > >> Hi all: > > >> > > >> There are hardwares 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. > > >> > > >> Though the series only contains 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. > > >> > > >> Also a real ICF VF driver was also posted here[2] which is a good > > >> reference for vendors who is interested in their own virtio datapath > > >> offloading product. > > >> > > >> 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. > > >> > > >> [1] https://lkml.org/lkml/2019/10/31/440 > > >> [2] https://lkml.org/lkml/2019/10/15/1226 > > >> > > >> Changes from V7: > > >> - drop {set|get}_mdev_features for virtio > > >> - typo and comment style fixes > > > > > > Seems we're nearly there, all the remaining comments are relatively > > > superficial, though I would appreciate a v9 addressing them as well as > > > the checkpatch warnings: > > > > > > https://patchwork.freedesktop.org/series/68977/ > > > > > > Will do. > > > > Btw, do you plan to merge vhost-mdev patch on top? Or you prefer it to > > go through Michael's vhost tree? > > I can include it if you wish. The mdev changes are isolated enough in > that patch that I wouldn't presume it, but clearly it would require > less merge coordination to drop it in my tree. Let me know. Thanks, > > Alex I'm fine with merging through your tree. If you do, feel free to include Acked-by: Michael S. Tsirkin <mst@xxxxxxxxxx> -- MST
