linux-kernel - Re: [PATCH v2] scripts/x86/intel: Add a script to update the minimum ucode revisions

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Message-ID: <aaed72a9-8dc8-4744-96ae-ac3db9fb4d01@intel.com>
Date: Fri, 22 Aug 2025 11:03:10 -0700
From: Sohil Mehta <sohil.mehta@...el.com>
To: Borislav Petkov <bp@...en8.de>
CC: Dave Hansen <dave.hansen@...ux.intel.com>, <x86@...nel.org>, "Thomas
 Gleixner" <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "H . Peter
 Anvin" <hpa@...or.com>, Peter Zijlstra <peterz@...radead.org>, Josh Poimboeuf
	<jpoimboe@...nel.org>, Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>, "Dave
 Hansen" <dave.hansen@...el.com>, Nikolay Borisov <nik.borisov@...e.com>,
	Andrew Cooper <andrew.cooper3@...rix.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] scripts/x86/intel: Add a script to update the minimum
 ucode revisions

On 8/22/2025 3:09 AM, Borislav Petkov wrote:

> What I don't see in this commit message is the "why". Why should
> this be in the kernel?
> 

Currently, we have a static list of microcode revisions that determine
old_microcode. So, it needs to be periodically updated as and when new
microcode releases are made. Also, some folks might want to have a
custom enforcement of the minimum microcode revisions (be it stricter or
relaxed).

The script makes it easier to update intel-ucode-defs.h by generating
output in the specific format it needs. Having this live in the kernel
makes it easier to find whenever needed and also be in sync with the
header format if it ever changes.

If you agree, I can update the commit message to include the why.