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

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Message-ID: <YK/q4RyKhoqFM2nJ@zn.tnic>
Date:   Thu, 27 May 2021 20:54:25 +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 Thu, May 27, 2021 at 01:49:42PM +0200, Thomas Gleixner wrote:
> Also if disabling this entry is causing the BIOS/SMM gunk to go south, then
> disabling CONFIG_X86_THERMAL_VECTOR should have the same effect.

Well, I believe the latter was practically impossible:

config X86_THERMAL_VECTOR
	def_bool y
	depends on X86 && CPU_SUP_INTEL && X86_LOCAL_APIC

so *if* the machine was sporting thermal SMI, then it very much needed
that code in intel_init_thermal() to unstuck the cores. At least it
looks that way...

-- 
Regards/Gruss,
    Boris.

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