linux-kernel - Re: [PATCH v2 01/15] x86/cpu: Move intel-family to arch-independent headers

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Date:   Mon, 11 Oct 2021 22:06:38 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Winiarska, Iwona" <iwona.winiarska@...el.com>
Cc:     "corbet@....net" <corbet@....net>,
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        "Williams, Dan J" <dan.j.williams@...el.com>
Subject: Re: [PATCH v2 01/15] x86/cpu: Move intel-family to arch-independent
 headers

On Mon, Oct 11, 2021 at 07:21:26PM +0000, Winiarska, Iwona wrote:
> Same reason why PECI can't just include arch/x86 directly (we're building for
> ARM, not x86).

Aha.

So what do you need those INTEL_FAM6* defines for?

I see peci_cpu_device_ids[] which are used to match the CPU so at least
that thing must be loading on x86 hardware... reading your 0th message,
it sounds like that peci-cpu thing is loaded on an x86 CPU and it then
exposes those interfaces which a PECI controller accesses.

And then I see in init_core_mask() the single usage of INTEL_FAM6* and
that drivers/hwmon/peci/cputemp.c is a CPU temp monitoring client so
that thing probably runs on x86 too.

Or?

If it does, then you don't need the code move.

But it looks like I'm missing something...

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette