Re: [PATCH v2 0/2] x86/cpuidle: Cannon Lake adjustments

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 02/04/2020 09:22, Jan Beulich wrote:
> As requested in reply to v1, this is now a pair of patches with
> the expectation that only patch 1 would be acked and go in.
>
> 1: drop Cannon Lake support
> 2: support Cannon Lake (again)

Dropping Cannon Lake support is only of any incremental benefit if we
drop it from everywhere, and I didn't mean to block this single patch on it.

Consider either A-by.

However, it would be helpful to consider what we could do for better
KCONFIG-able CPU support.

Some downstreams have a separate build for each platform, and some go as
far as cramming Xen into the boot SPI ROM, so space saving is a very
important aspect.

On a different front, being able to compile out support for CPUs without
VMX unrestricted mode, or without CMPXCHG16B would be helpful.

I would certainly like to get CONFIG_{INTEL,AMD} usable even if only so
randconfig can help keep our interfaces clean.

~Andrew