RE: [PATCH V3 00/10] vhost-vDPA multiqueue

[Zhang, Chen]

> -----Original Message-----
> From: Qemu-devel <qemu-devel-
> bounces+chen.zhang=intel.com@nongnu.org> On Behalf Of Jason Wang
> Sent: Tuesday, September 7, 2021 5:03 PM
> To: mst@redhat.com; jasowang@redhat.com; qemu-devel@nongnu.org
> Cc: eperezma@redhat.com; elic@nvidia.com; gdawar@xilinx.com; Zhu,
> Lingshan <lingshan.zhu@intel.com>; lulu@redhat.com
> Subject: [PATCH V3 00/10] vhost-vDPA multiqueue
> 
> Hi All:
> 
> This patch implements the multiqueue support for vhost-vDPA. The most
> important requirement si the control virtqueue support. The virtio-net and

Typo:
 S/si/is


> vhost-net core are tweak to support control virtqueue as if what data queue
> pairs are done: a dedicated vhost_net device which is coupled with the
> NetClientState is intrdouced so most of the existing vhost codes could be
> reused with minor changes. This means the control virtqueue will bypass the
> Qemu. With the control virtqueue, vhost-vDPA are extend to support
> creating and destroying multiqueue queue pairs plus the control virtqueue.
> 
> For the future, if we want to support live migration, we can either do shadow
> cvq on top or introduce new interfaces for reporting device states.
> 
> Tests are done via the vp_vdpa driver in L1 guest.
> 
> Changes since V2:
> 
> - rebase to qemu master
> - use "queue_pairs" instead of "qps"
> - typo fixes
> 
> Changes since V1:
> 
> - start and stop vhost devices when all queues were setup
> - fix the case when driver doesn't support MQ but device support
> - correctly set the batching capability to avoid a map/unmap storm
> - various other tweaks
> 
> Jason Wang (10):
>   vhost-vdpa: open device fd in net_init_vhost_vdpa()
>   vhost-vdpa: classify one time request
>   vhost-vdpa: prepare for the multiqueue support
>   vhost-vdpa: let net_vhost_vdpa_init() returns NetClientState *
>   net: introduce control client
>   vhost-net: control virtqueue support
>   virtio-net: use "queue_pairs" instead of "queues" when possible
>   vhost: record the last virtqueue index for the virtio device
>   virtio-net: vhost control virtqueue support
>   vhost-vdpa: multiqueue support
> 
>  hw/net/vhost_net.c             |  55 ++++++++---
>  hw/net/virtio-net.c            | 165 ++++++++++++++++++---------------
>  hw/virtio/vhost-vdpa.c         |  56 +++++++++--
>  include/hw/virtio/vhost-vdpa.h |   1 +
>  include/hw/virtio/vhost.h      |   2 +
>  include/hw/virtio/virtio-net.h |   5 +-
>  include/net/net.h              |   5 +
>  include/net/vhost_net.h        |   6 +-
>  net/net.c                      |  24 ++++-
>  net/vhost-vdpa.c               | 127 ++++++++++++++++++++++---
>  10 files changed, 328 insertions(+), 118 deletions(-)
> 
> --
> 2.25.1
>