Re: [Patch 1/1] x86 pci: Add option to not assign BAR's if not alreadyassigned

From: H. Peter Anvin
Date: Thu May 13 2010 - 16:09:51 EST


On 05/13/2010 01:02 PM, Bjorn Helgaas wrote:
>
> Yep, that's definitely a problem, and I don't have a good solution.
>
> HP (and probably SGI) had a nice hardware solution for ia64 --
> address translation across the host bridge, so each bridge could
> have its own 64K I/O space. But I don't see that coming in the
> x86 PC arena.
>

I would agree, that is unlikely (not that I have any information on this
subject, mind you.) Much more likely would be a bridge extension
capability for finer-grained I/O space routing.

-hpa
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