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SubjectRe: [PATCH] x86: Bypass legacy PIC and PIT on ACPI hardware reduced platform
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On Wed, 2015-03-04 at 15:05 +0100, 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?

In some cases they don't belong in x86, ACPI is also used for ARM64.

However

if ( has_8259_pic() )

is trivally 0, 1 or some platform or acpi provided method.




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