On Tue, Oct 19, 2021 at 3:21 PM Michael S. Tsirkin <m...@redhat.com> wrote: > > On Mon, Oct 11, 2021 at 12:28:19PM +0800, Jason Wang wrote: > > Hi All: > > > > This patch implements the multiqueue support for vhost-vDPA. The most > > important requirement si the control virtqueue support. The virtio-net > > and 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. > > > I had to defer this due to rework I picked up. > I pushed an experimental tree - it still has issues but > if you rebase on top of that I can apply.
Will do. For the tree, is it git://git.kernel.org/pub/scm/virt/kvm/mst/qemu.git next? Thanks > > > Tests are done via the vp_vdpa driver in L1 guest. > > > > Changes since V3: > > > > - fix build with vhost disabled > > > > 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-stub.c | 4 +- > > 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 ++++++++++++++++++++++--- > > 11 files changed, 330 insertions(+), 120 deletions(-) > > > > -- > > 2.25.1 >
