[Qemu-devel] Re: [SeaBIOS] [PATCH 0/8] option rom loading overhaul.

[Gerd Hoffmann]

On 12/18/09 15:35, Anthony Liguori wrote:

> I know this series carries a good bit of risk but I'd like to bring it
> in 0.12.0. Because this has a guest visible change to the PCI devices,
> we cannot carry it in stable-0.12 post release and I think the
> functionality it brings it's very important.

The guest visible change automatically raises the question:
Do we need to do something for -M pc-0.11?  Like loading the pci roms 
via fw_cfg too so the guest doesn't see the new pci rom bar?

Oh, and while thinking about compatibility issues:  What about 
migration?  I think we have to save rom_offset in case $pcidevice has a 
rom bar, otherwise your roms are gone after migration.  Which you 
wouldn't notice until reboot though.

Is 0.11 -> 0.12 migration supposed to work?  That could become quite 
nasty too.  But maybe that is impossible anyway due to the switch to 
seabios?

cheers,
  Gerd