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

[H. Peter Anvin]

On 05/14/2010 04:33 PM, Jesse Barnes wrote:
> 
> As for BIOS coordination for dynamic reallocation, yeah there'd be some
> of that.  I think the basic principles would be:
>   1) use BIOS allocations wherever possible
>   2) get an accurate list of available resources from the BIOS for
>      potential remapping later
>   3) allocate resources for BARs and devices as late as possible (e.g.
>      at driver bind time) to avoid allocating more than we need
> 
> But that's a good chunk of work, and as we've seen, PCs in particular
> are really sensitive to having resources moved around too much, so step
> (2) is probably the hardest part.
> 

The real problem that I see, as outlined before, has nothing to do with
the BIOS, but rather the interdependencies between resources.

	-hpa

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