Re: [Qemu-devel] [BUG] [Seabios] PCI 64bit BARs on Win2008 - unable to start the device. (ACPI lacks the _DSM method)

[Alexey Korolev]

Hi,
> > It shouldn't be that hard to add the latter though.  seabios needs two
> > more pci_region_type (PCI_REGION_TYPE_MEM_64 and
> > PCI_REGION_TYPE_PREFMEM_64) to track and map 64bit bars separately.  And
> > a address space window where it can map 64bit bars to.
> Right. This is a thing I'm thinking about now. I seems that the 
> specifying 0x0 address in 64bit BARS is a bad idea. At least older 
> versions of Linux just hang as soon as requested range does not fit in 
> first 4GB.
> So the only option would be specifying the particular address range. 
> It seems this works for everything - yet.
I wonder if there any particular reason to separate prefetchable a 
non-prefetchable memory regions in pciinit? Extra two more regions would 
make code more complex.

Regards,
Alexey