[SeaBIOS] [Qemu-devel] [RFC] map 64-bit PCI devices after all possible RAM

Igor Mammedov imammedo at redhat.com
Thu Oct 10 15:50:54 CEST 2013

On Thu, 10 Oct 2013 15:21:55 +0200
Gerd Hoffmann <kraxel at redhat.com> wrote:

>   Hi,
> > > Guess we can just go with Igor's approach then.  "etc/mem64-end" is a
> > > pretty bad name to say "please map 64bit pci bars here" though.
> > reasoning bind was to tell BIOS where RAM ends and let it decide what
> > to do with this information.
> > 
> > But we could do other way around and use "etc/pci-info" that was
> > proposed earlier by Michael, it is already committed into QEMU and
> > provides start/end of 32/64-bit PCI windows in QEMU view.
> > We could use pci-info.w64.start as base for 64-bit bars.
> We need only the single value from pci-info, I'd suggest to drop
> pci-info in favor of a file you can read using romfile_loadint.
Ok, then would "etc/pcimem64-start" be suitable or maybe you have a

while at it, could we safely rip out "etc/pci-info" from QEMU?
It is disabled by pc_compat_1_6() in 1.6 but will appear in 1.7 again
if we don't remove it.

> cheers,
>   Gerd

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