[Qemu-devel] [PATCH 00/15] vhost-net: preview

[Michael S. Tsirkin]

Here's a patchset with vhost support for upstream qemu.

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: another team is working on this.


Michael S. Tsirkin (15):
  exec: memory notifiers
  kvm: move kvm_set_phys_mem around
  kvm: move kvm to use memory notifiers
  kvm: add API to set ioeventfd
  notifier: event notifier implementation
  virtio: add notifier support
  virtio: add APIs for queue fields
  virtio: add status change callback
  virtio: move typedef to qemu-common
  virtio-pci: fill in notifier support
  tap: add interface to get device fd
  vhost: vhost net support
  tap: add vhost/vhostfd options
  tap: add API to retrieve vhost net header
  virtio-net: vhost net support

 Makefile.target      |    2 +
 cpu-common.h         |   19 ++
 exec.c               |  110 +++++++++-
 hw/notifier.c        |   50 ++++
 hw/notifier.h        |   16 ++
 hw/s390-virtio-bus.c |    3 +
 hw/syborg_virtio.c   |    2 +
 hw/vhost.c           |  603 ++++++++++++++++++++++++++++++++++++++++++++++++++
 hw/vhost.h           |   44 ++++
 hw/vhost_net.c       |  147 ++++++++++++
 hw/vhost_net.h       |   20 ++
 hw/virtio-net.c      |   67 ++++++-
 hw/virtio-pci.c      |   68 ++++++
 hw/virtio.c          |   52 +++++-
 hw/virtio.h          |   15 +-
 kvm-all.c            |  330 ++++++++++++++++------------
 kvm.h                |   24 ++-
 net.c                |    8 +
 net/tap.c            |   43 ++++
 net/tap.h            |    5 +
 qemu-common.h        |    2 +
 qemu-options.hx      |    4 +-
 22 files changed, 1470 insertions(+), 164 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