On 08/21/10 16:20, Kevin O'Connor wrote:
On Fri, Aug 20, 2010 at 09:39:10AM -0500, Anthony Liguori wrote:
On 08/20/2010 09:09 AM, Gerd Hoffmann wrote:
Been there, tried that. It isn't *that* easy. The PCI ID in the
option rom header doesn't match the PCI ID of the emulated lsi, so
seabios refuses to load it from the rom bar.
Heh, I was wondering why it didn't work unless I put rombar=0 :-)
Is this fixable in a reasonable way or does PCI ID in the option rom
represent a much newer device that would trigger issues with guest
drivers?
The PCI spec requires that the PCI IDs match - this is done so that a
single rom can store multiple optionroms.
One could place the optionrom in fw_cfg with a "file" name of
"pciXXXX,YYYY.rom". SeaBIOS will then deploy that rom for every
device that has the given vendor/devid. (It wont require matching PCI
IDs ids in the rom.)
Yea, this is exactly what "rombar=0" (property for pci devices) does:
load the rom via fw_cfg instead of using the pci option rom bar ;)
cheers,
Gerd
