linux-kernel - Re: AMD zen microcode updates breaks boot

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Message-ID: <5fe1e264-c285-4988-b1e3-46771d07172b@kernel.dk>
Date: Sat, 28 Sep 2024 05:31:36 -0600
From: Jens Axboe <axboe@...nel.dk>
To: Borislav Petkov <bp@...en8.de>
Cc: Thomas Gleixner <tglx@...utronix.de>,
 the arch/x86 maintainers <x86@...nel.org>,
 LKML <linux-kernel@...r.kernel.org>
Subject: Re: AMD zen microcode updates breaks boot

On 9/28/24 12:10 AM, Borislav Petkov wrote:
> On Fri, Sep 27, 2024 at 09:17:46AM -0600, Jens Axboe wrote:
>> which seems plausible. And indeed, reverting that commit (and its fixup)
>> on top of current -git does indeed solve it.
> 
> Can you send full dmesg from that kernel with the patch reverted and
> also upload somewhere

Here's dmesg on the kernel I booted yesterday, which is -git (and some
other branches) and the two patches reverted:

https://kernel.dk/r7625.dmesg.gz

> /lib/firmware/amd-ucode/microcode_amd_fam19h.bin

https://kernel.dk/microcode_amd_fam19h.bin

This is from:

axboe@...25 ~> apt show amd64-microcode
Package: amd64-microcode
Version: 3.20240820.1

as the box is running debian testing/unstable.

-- 
Jens Axboe