[SeaBIOS] Re: [PATCH v2 4/4] only enable 64bit pci io window when RAM >64G

[Kevin O'Connor]

On Fri, Jun 21, 2024 at 01:37:24PM +0100, John Levon wrote:
> On Fri, Jun 21, 2024 at 02:05:17PM +0200, Gerd Hoffmann wrote:
> > On Wed, Jun 19, 2024 at 11:21:14AM GMT, John Levon wrote:
> > > Older 32-bit Linux VMs (including Ubuntu 16.10) have issues with the
> > > 64-bit pci io window, failing during boot with errors like:
> >
> > Turns out it apparently can't deal with PCI bars mapped above 16TB (aka
> > 44 phys-bits).  Test patch below.
>
> Thanks for the patch, I can confirm this also works with Ubuntu 14.04 (oldest we
> had to hand) as well as a couple of 32-bit Windows VMs. This is a much better
> fix!

Thanks for tracking this down and testing.  I agree this looks like an
improved fix.

-Kevin