[Qemu-devel] [PATCH 0/6] virtio/vhost cross-endian cleanup

[Greg Kurz]

This series brings some improvements to the cross-endian support in the
virtio and vhost code:
- use qemu_set_vnet_be() and qemu_set_vnet_le() directly from virtio-net,
  so that backend cross-endian capabilities benefit to both emulated and
  vhost accelerated devices
- optimize virtio_access_is_big_endian() for little-endian targets
- various cleanups

These patches had already been posted last year as two separate series:

https://lists.nongnu.org/archive/html/qemu-devel/2015-11/msg04166.html
https://lists.nongnu.org/archive/html/qemu-devel/2015-12/msg02827.html

I could not observe performance changes between guest and host on x86 with
an emulated virtio-net device.

---

Greg Kurz (6):
      virtio-net: use the backend cross-endian capabilities
      Revert "vhost-net: tell tap backend about the vnet endianness"
      virtio: drop the virtio_needs_swap() helper
      virtio: move cross-endian helper to vhost
      vhost: move virtio 1.0 check to cross-endian helper
      virtio: optimize virtio_access_is_big_endian() for little-endian targets


 hw/net/vhost_net.c                |   33 +------------------------------
 hw/net/virtio-net.c               |   40 +++++++++++++++++++++++++++++++++++--
 hw/virtio/vhost.c                 |   22 +++++++++++++++++---
 include/hw/virtio/virtio-access.h |   25 +++--------------------
 include/hw/virtio/virtio-net.h    |    1 +
 5 files changed, 61 insertions(+), 60 deletions(-)