[SeaBIOS] [PATCH] pci: improve io address space allocation

[H. Peter Anvin]

On 01/23/2014 07:03 AM, Gerd Hoffmann wrote:
> This patch improves the io address space allocation.  It adds a check
> that the region above 0xc000 which is traditionally used for pci io
> is actually big enougth.  If it isn't it tries the larger window at
> 0x1000.  If that is to small too it errors out.
> 
> When creating guests with multiple pci-pci bridges (and devices with
> io regions behind them) the 0xc000 -> 0xffff region quickly becomes
> too small.
> 
> While being at it document the io address space layout used by
> qemu/seabios.
> 

Silly question: why not just allocate from the top down?

	-hpa