linux-kernel - Re: [PATCH] x86/thermal: Fix LVT thermal setup for SMI delivery mode

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Date:   Fri, 28 May 2021 13:19:20 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Borislav Petkov <bp@...e.de>, James Feeney <james@...ealm.net>,
        linux-smp@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
        lkml <linux-kernel@...r.kernel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        x86-ml <x86@...nel.org>
Subject: Re: [PATCH] x86/thermal: Fix LVT thermal setup for SMI delivery mode

On Fri, May 28, 2021 at 10:23:42AM +0200, Thomas Gleixner wrote:
> So you could disable CPU_SUP_INTEL ... Should still boot with reduced
> functionality.

*If* you disable it and *if* that intel_init_thermal() is really there
to unstick those cores, then you might not even boot successfully.

> What a mess...

When is it not when SMM is involved?

That stinking goo underneath the OS needs to be open sourced so that we
can replace it with something small and sane. BIOS morons will never
learn not to fiddle with architectural components.

-- 
Regards/Gruss,
    Boris.

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