linux-kernel - Re: Old microcode CPU matching issue - x86/microcode/intel: Refresh the revisions that determine old

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Message-ID: <86580b33-8ab2-4fb9-9166-77e751a20944@intel.com>
Date: Fri, 21 Nov 2025 12:26:54 -0800
From: Sohil Mehta <sohil.mehta@...el.com>
To: Dave Hansen <dave.hansen@...el.com>, Jon Kohler <jon@...anix.com>
CC: Dave Hansen <dave.hansen@...ux.intel.com>, "x86@...nel.org"
	<x86@...nel.org>, Borislav Petkov <bp@...en8.de>, 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>,
	Nikolay Borisov <nik.borisov@...e.com>, Alex Murray
	<alex.murray@...onical.com>, Andrew Cooper <andrew.cooper3@...rix.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Old microcode CPU matching issue - x86/microcode/intel: Refresh
 the revisions that determine old_microcode

On 11/20/2025 4:39 PM, Dave Hansen wrote:
> Any additional testing or eyeballs on the code would be appreciated.

I tried out the updated patches on an SPR system. With some made up
entries the old_microcode flagging worked as expected.