linux-kernel - Re: [tip: x86/microcode] x86/cpu: Help users notice when running old Intel microcode

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Message-ID: <aAc3hCVAnNLVo-Xh@gmail.com>
Date: Tue, 22 Apr 2025 08:30:28 +0200
From: Ingo Molnar <mingo@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: linux-tip-commits@...r.kernel.org,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org
Subject: Re: [tip: x86/microcode] x86/cpu: Help users notice when running old
 Intel microcode


* tip-bot2 for Dave Hansen <tip-bot2@...utronix.de> wrote:

> The following commit has been merged into the x86/microcode branch of tip:
> 
> Commit-ID:     377781ebaa7c35ab3e91af29074d5f39100372f2
> Gitweb:        https://git.kernel.org/tip/377781ebaa7c35ab3e91af29074d5f39100372f2
> Author:        Dave Hansen <dave.hansen@...ux.intel.com>
> AuthorDate:    Mon, 21 Apr 2025 12:56:59 -07:00
> Committer:     Dave Hansen <dave.hansen@...ux.intel.com>
> CommitterDate: Mon, 21 Apr 2025 12:59:29 -07:00
> 
> x86/cpu: Help users notice when running old Intel microcode
> 
> Changes from v4:
>  - Update list from commit: 8ac9378 microcode-20241112 Release
> 
> Changes from v3:
>  - Update changelog and documentation to clarify behavior when
>    microcode is updated at runtime.
> 
> Changes from v2:
>  - Make cpu_latest_microcode[] static
>  - Add a pr_info() when the CPU is not in the microcode version list
> 
> Changes from v1:
>  - Flesh out changelog
>  - Add Documentation/
>  - add_taint() and pr_warn() in addition to vulnerabilities/ file
>  - Add checks for running under VMMs. Do not taint and
>    report vulnerability as unknown.

These should not be part of a commit log.

> From: Dave Hansen <dave.hansen@...ux.intel.com>

> +	/* Give new microocode a pass: */
> +	if (boot_cpu_data.microcode >= m->driver_data)
> +		return false;

Typo:

  s/microocode
   /microcode

I've amended the commit in tip:x86/microcode accordingly, please let me 
know if this version is fine to you too:

  9127865b15eb ("x86/cpu: Help users notice when running old Intel microcode")

Thanks,

	Ingo