[Qemu-devel] [PATCH 0/7] virtio-serial: Don't copy guest buf to host, flow control

[Amit Shah <amit.shah@redhat.com>]

Hello,

This series is now separated from the chardev flow control series.
The virtio-serial code now does not copy over data from the guest to
the host.  It instead keeps track of how far we are in consuming the
data and maintains this state.

For flow control, when a user of the virtio-serial port signals it has
consumed less data than given, port throttling is enabled.  The
consumer can then later disable throttling and we can re-start sending
the data from where we left off.

Finally, new fields introduced are added to the save/restore section
to preserve state across live migrations.

Please apply.

Amit Shah (7):
  virtio-console: Factor out common init between console and generic
    ports
  virtio-console: Remove unnecessary braces
  virtio-serial-bus: separate out discard logic in a separate function
  virtio-serial: Don't copy over guest buffer to host
  virtio-serial: Let virtio-serial-bus know if all data was consumed
  virtio-serial: Add support for flow control
  virtio-serial: save/restore new fields in port struct

 hw/virtio-console.c    |   38 +++++++--------
 hw/virtio-serial-bus.c |  123 +++++++++++++++++++++++++++++++++++++++---------
 hw/virtio-serial.h     |   24 ++++++++-
 3 files changed, 139 insertions(+), 46 deletions(-)

-- 
1.7.3.4