[Qemu-devel] [PATCHv3 00/12] vhost-net: upstream integration

["Michael S. Tsirkin" <mst@redhat.com>]

Here's a patchset with vhost support for upstream qemu,
rabed to latest bits.

Note that irqchip/MSI is no longer required for vhost, but you should
not expect performance gains from vhost unless in-kernel irqchip is
enabled (which is not in upstream qemu now), and unless guest enables
MSI.  A follow-up patchset against qemu-kvm will add irqchip support.

Only virtio-pci is currently supported: I'm interested in supporting
syborg/s390 as well, and tried to make APIs generic to make this
possible.

Also missing is packet socket backend.

Cc'd, you did review of these internally, I would be thankful
for review/ack upstream.

Changes from v2:
  Addressed style comments
  Detect mapping changes and abort
  Unmap ring on cleanup

Changes from v1:
  Addressed style comments
  Migration fixes.
  Gracefully fail with non-tap backends.

Michael S. Tsirkin (12):
  tap: add interface to get device fd
  kvm: add API to set ioeventfd
  notifier: event notifier implementation
  virtio: add notifier support
  virtio: add APIs for queue fields
  virtio: add set_status callback
  virtio: move typedef to qemu-common
  virtio-pci: fill in notifier support
  vhost: vhost net support
  tap: add vhost/vhostfd options
  tap: add API to retrieve vhost net header
  virtio-net: vhost net support

 Makefile.target      |    3 +
 configure            |   36 +++
 hw/notifier.c        |   62 +++++
 hw/notifier.h        |   16 ++
 hw/s390-virtio-bus.c |    4 +-
 hw/syborg_virtio.c   |    2 +-
 hw/vhost.c           |  706 ++++++++++++++++++++++++++++++++++++++++++++++++++
 hw/vhost.h           |   48 ++++
 hw/vhost_net.c       |  198 ++++++++++++++
 hw/vhost_net.h       |   19 ++
 hw/virtio-net.c      |   71 +++++-
 hw/virtio-pci.c      |   67 +++++-
 hw/virtio.c          |   81 ++++++-
 hw/virtio.h          |   28 ++-
 kvm-all.c            |   22 ++
 kvm.h                |   16 ++
 net.c                |    8 +
 net/tap.c            |   43 +++
 net/tap.h            |    5 +
 qemu-common.h        |    2 +
 qemu-options.hx      |    4 +-
 21 files changed, 1431 insertions(+), 10 deletions(-)
 create mode 100644 hw/notifier.c
 create mode 100644 hw/notifier.h
 create mode 100644 hw/vhost.c
 create mode 100644 hw/vhost.h
 create mode 100644 hw/vhost_net.c
 create mode 100644 hw/vhost_net.h