Re: [patches] [patch 3/5] x86: Add PCI extended config space access for AMD Barcelona
From: Andi Kleen
Date: Mon Sep 03 2007 - 06:16:38 EST
> But it is needed for some devices for full functionality.
Examples? I can only think of PCI express error reporting, which
few drivers implement anyways and isn't really a show stopper
if it doesn't work. Besides I would be surprised if it even works
on the cheap desktop boards which have MCFG less BIOS.
> E.g. for perfmon (family 0x10/extended inerrupts) extended config space
> access is a prerequisite.
How so?
>
> IMHO it is best to try to use MMCONFIG if it's working and to use
> a fallback (e.g. CF8 ECS access for family 0x10) if available.
We only put in workarounds if there is a serious problem otherwise (e.g. not
booting etc.). I just don't see this here.
-Andi
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/