linux-kernel - Re: [PATCH] x86/microcode: Fix crashes on early 486 CPUs due to usage of 'cpuid'.

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Message-Id: <20250405130306.ca9822c1f27db119cc973603@ombertech.com>
Date: Sat, 5 Apr 2025 13:03:06 +1100
From: Kevin Koster <lkml@...ertech.com>
To: Oerg866 <oerg866@...glemail.com>
Cc: linux-kernel@...r.kernel.org, Borislav Petkov <bp@...en8.de>, Thomas
 Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Dave Hansen
 <dave.hansen@...ux.intel.com>, x86@...nel.org, "H. Peter Anvin"
 <hpa@...or.com>
Subject: Re: [PATCH] x86/microcode: Fix crashes on early 486 CPUs due to
 usage of 'cpuid'.

On Sat, 19 Oct 2024 08:29:04 +0200
Oerg866 <oerg866@...glemail.com> wrote:

> Starting with v6.7-rc1, the kernel was no longer able to boot on early
> i486-class CPUs.

Thanks for this patch! It solves my problem with kernel 6.12.11
rebooting at start-up on 486 CPUs, which had me puzzled. (tested on
AM486DX2-66 and CX486DX4-100)

Is there a reason why the patch wasn't accepted? I've proposed using it
for the Tiny Core Linux distro's x86 kernel builds, which target 486DX
and later CPUs.