[Qemu-devel] [PATCH v4.1] Add optionrom compatible with fw_cfg DMA version

[Richard W.M. Jones]

This is an updated version of Marc Marí's Linux DMA patch, based on
version 4 from:

https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg05891.html

All I have done for my "4.1" version is:

 - Modify it so it compiles against the latest qemu.  There was
   a change to how fw_cfg.h is split (6f061ea10f28c) which broke
   the patch.

 - Run checkpatch and fix several problems.

 - Test it.

This patch greatly and transparently improves boot time of the
libguestfs appliance on x86, and so I'd like to see it integrated
upstream.

Rich.