Re: [PATCH] x86: Bypass legacy PIC and PIT on ACPI hardware reduced platform

From: Rafael J. Wysocki
Date: Wed Mar 04 2015 - 09:14:30 EST

On Wednesday, March 04, 2015 03:05:55 PM Borislav Petkov wrote:
> On Wed, Mar 04, 2015 at 03:16:07PM +0100, Rafael J. Wysocki wrote:
> > Sort of. What we need is a "do not touch PIC/PIT" bit for the code that
> > tries to fall back to them in some cases (which may appear to work if
> > the hardware is physically there, but it may confuse the platform).
> Can "some cases" detection be nicely put into a x86_platform
> platform-specific method?

I guess so.

The problem is that we just do that fallback unconditionally today which
evidently doesn't always work.

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