Re: [tip:x86/platform] x86/PCI/mmcfg: Switch to ECAM config mode if possible

From: Thomas Gleixner
Date: Fri Jun 30 2017 - 10:31:48 EST


On Thu, 29 Jun 2017, Andi Kleen wrote:
> > Would this patch actually void the commit:
>
> Yes it does. My origina; patches were opt-in for this reason, but Thomas doesn't
> believe in historical or other people's experience.

I did not realize that particular wreckage.

> But MCFG problems were a long time ago and noone uses these systems anymore,
> so perhaps he is right.

The obvious solution to this is to force type 1 for older machines, i.e. <=
K8. Some day we should stop supporting 15+ years old crap just because we
can.

Thanks,

tglx