Re: [discuss] Re: Please pull x86-64 bug fixes

[Arjan van de Ven <arjan@infradead.org>]

On Thu, 2006-10-05 at 15:45 -0700, Linus Torvalds wrote:
> 
> On Thu, 5 Oct 2006, Jeff Garzik wrote:
> 
> > Andi Kleen wrote:
> > > If the choice is between a secret NDA only card with dubious
> > > functionality and booting on lots of modern boards I know what to choose.
> > 
> > That's a strawman argument.  There is no need to choose.  You can clearly boot
> > on lots of modern boards with mmconfig just fine.  We just need to narrow down
> > which ones.
> 
> Jeff, _that_ is the strawman argument.
> 
> The thing is, nobody has been able to so far come up with a way to narrow 
> down which ones.
> 
> I think Andi's response was quite on the mark: if you have a patch to 
> narrow it down, please share. Until then, the fact is, we don't know 
> _how_, and you're barking up the wrong tree.


we can do a tiny bit better than the current code; some chipsets have
the address of the MMIO region stored in their config space; so we can
get to that using the old method and validate the acpi code with that.

I'm (in the background) working on collecting which chipsets have this;
it seems that at least several Intel ones do.