[UNIKRAFT/LWIP PATCH v5 0/5] Xen netfront support

[Simon Kuenzer <simon.kuenzer@xxxxxxxxx>]

The current changes are required for supporting netfront devices in
Unikraft. The patches basically add support for aligned packet buffer
allocations as required by netfront devices.

Changes since v4:
 - Remove code alternatives related to ETH_PAD_SIZE != 0
 - Use `struct uk_netdev_info` within `lwip_data` instead
   of individual fields
 - Add a TODO comment about per queue allocators

Changes since v3:
 Due to drastic changes of the Unikraft base,
 this is a rewrite of this patch series at v3.
 It applies:
 - Use ioalign field from uknetdev
 - Use aligned netbuf allocation helpers from lib/uknetdev
 - Make use of uknetdev scratch pad for device local fields

Changes since v2:
 - Use nb_align field for queue infos
 - First patch of v3 was already upstreamed

Costin Lupu (1):
  cc.h: Disable Ethernet frame padding

Simon Kuenzer (4):
  uknetdev: Per device `lwip_data` to callbacks
  uknetdev: Per device RX and TX headroom
  netbuf: Aligned buffers with `lwip_alloc_netbuf()`
  uknetdev: Retrieve `ioalign` from device

 Config.uk         |   2 +-
 include/arch/cc.h |   7 ++-
 netbuf.c          |  26 +++-------
 netbuf.h          |   2 +-
 uknetdev.c        | 123 ++++++++++++++++++++++------------------------
 5 files changed, 72 insertions(+), 88 deletions(-)

-- 
2.20.1