[Qemu-devel] [PATCH v3 0/3] dataplane: misaligned buffers support for Windows guests

[Stefan Hajnoczi <stefanha@redhat.com>]

Windows guests do not work with x-data-plane=on because misaligned request
support is missing in hw/dataplane/virtio-blk.c.  This series adds a bounce
buffer when the request is misaligned.  Windows guests now work with
x-data-plane=on.

v3:
 * Use iov/iov_cnt before modifying them in do_rdwr_cmd() [Kevin, Paolo]
 * Keep bounce buffer iovec alive across io_submit() [Stefan]
 * New & improved!  Now tested against Linux in addition to Windows guests. [Paolo]

v2:
 * Use qemu_iovec_from_buffer() on read completion, not qemu_iovec_to_buffer() [Stefan]

Stefan Hajnoczi (3):
  block: make qiov_is_aligned() public
  dataplane: extract virtio-blk read/write processing into do_rdwr_cmd()  dataplane: handle misaligned virtio-blk requests

 block.c                   | 16 +++++++++++
 block/raw-posix.c         | 18 +-----------
 hw/dataplane/virtio-blk.c | 71 +++++++++++++++++++++++++++++++++++++++--------
 include/block/block.h     |  1 +
 4 files changed, 78 insertions(+), 28 deletions(-)

-- 
1.8.0.2