Re: [PATCH] ACPI: processor_idle: Skip dummy wait for processors based on the Zen microarchitecture

[Borislav Petkov]

On Wed, Sep 21, 2022 at 05:00:35PM +0200, Peter Zijlstra wrote:
> On Wed, Sep 21, 2022 at 12:06:38PM +0530, K Prateek Nayak wrote:
> > Processors based on the Zen microarchitecture support IOPORT based deeper
> > C-states. 
> 
> I've just gotta ask; why the heck are you using IO port based idle
> states in 2022 ?!?! You have have MWAIT, right?

They have both. And both is Intel technology. And as I'm sure you
know AMD can't do their own thing - they kinda have to follow Intel.
Unfortunately.

Are you saying modern Intel chipsets don't do IO-based C-states anymore?

-- 
Regards/Gruss,
    Boris.

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