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

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Message-ID: <13fe104b-d83b-4d6d-a348-1103d402540d@kernel.dk>
Date: Wed, 16 Oct 2024 20:34:09 -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>,
 "regressions@...ts.linux.dev" <regressions@...ts.linux.dev>
Subject: Re: AMD zen microcode updates breaks boot

On 10/10/24 7:50 AM, Jens Axboe wrote:
> On 10/10/24 7:46 AM, Borislav Petkov wrote:
>> On Wed, Oct 09, 2024 at 05:04:23AM -0600, Jens Axboe wrote:
>>> Yep, 0xaa00215
>>
>> Found something: I'm not handling the stepping properly, below is a big diff
>> along with debug printks. Can you pls run it and send me dmesg. I'm assuming
>> the box will boot with it.
> 
> Sure will give it a spin. The box is tied up with testing for now, but
> I should be able to run this later today and send you the output.

And then I totally forgot... Got it done now, but it still just hangs
after loading the kernel. No output.

-- 
Jens Axboe