[SeaBIOS] QEMU fw_cfg DMA interface

[Gerd Hoffmann]

  Hi,

> > The command line I used is:
> > 
> > x86_64-softmmu/qemu-system-x86_64 --enable-kvm \
> >     -kernel /boot/vmlinuz-4.0.7-300.fc22.x86_64 \
> >     -L pc-bios/optionrom/ \
> >     -bios roms/seabios/out/bios.bin -nographic
> 
> Thanks.  One thing that immediately pops up is that even though
> "-nographic" is used, it looks like QEMU still emulates a VGA device
> and that device has an option rom that takes several milliseconds to
> init the display hardware.  Adding "-device VGA,romfile=" to the qemu
> command line will further reduce the boot time by avoiding this
> hardware init delay.

Same goes for the NIC btw.

cheers,
  Gerd