On Tue, Dec 15, 2009 at 01:21:38PM -0600, Anthony Liguori wrote: > Gerd Hoffmann wrote: >> On 12/15/09 03:37, Anthony Liguori wrote: >>> Okay, I think I've figured out how this is supposed to work. With these >>> two patches to SeaBIOS and the patch to qemu, I can run: >>> >>> qemu -net nic,model=rtl8139 -net nic,model=virtio -net nic,model=e1000 >>> -boot menu=on >>> >>> And all three option roms load. I can also select which NIC I want to >>> boot from using the F12 menu. This works by not actually loading the >>> option roms in the 1M space, but instead making them mappable through >>> the PCI devices. With PMM and DDIM, the result is that we only have to >>> copy in 2K for each option rom which means we can support up to 48 >>> unique option roms. That should be plenty for now. >>> >>> These patches are very rough but I'll clean them up tomorrow. I'm not >>> sure the best way to integrate with the rom infrastructure since we no >>> longer have a physical address to map to. Any suggestions Gerd? >> >> Is this needed in the first place? > > Only if we care about 'info roms' working. Problem is roms is very > centric now to roms at a static guest physical location. In this case, > the rom lives in hardware and is mapped into physical memory based on > what the guest does. > > Regards, > > Anthony Liguori
I also think it is very important to have roms sent during migration, otherwise things break if we migrate in the middle of accessing roms. -- MST
