Anthony Liguori wrote:
Michael S. Tsirkin wrote:
I think it's stable-0.12 material because it's badly broken right now
I thought the rule was no guest visible changes in stable series?
Yeah, good point, so we need to figure out something for 0.12.0.
Sebastian's suggestion of loading roms from 0xc0000 first and then from
PCI devices is a good one, but I think the problem with that is that the
roms don't necessarily have to be contiguous in that space. For
instance, the lower bios portions are technically in the rom area which
leaves a big gap in the middle.
I don't think i get your objection - mind to explain it a little bit?
My suggestion was like this:
PCI pc and -option-rom rom1.bin -option-rom rom2.bin
Qemu will map rom1.bin to PC_ROM_MIN_OPTION (0xc8000) and map rom2.bin
to 0xd0000. Either qemu will map vga bios to PC_ROM_MIN_VGA (0xc0000) or
SeaBIOS will map it there (with pci 3.0 it could map it somewhere else, but i
doubt thats
a good idea). In case the vga bios size is below 0x8000, some rom space is
lost. SeaBIOS
will scan the option rom space starting at PC_ROM_MIN_OPTION and adjust its
RomEnd in
case a rom is found. Then it will start the pci scan and map pci option roms
after RomEnd.
- Sebastian
