Re: linux-firmware and CPU microcodes

[Michael Tremer <michael.tremer@ipfire.org>]

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Hello Peter,

> On 30 Apr 2022, at 09:41, Peter Müller <peter.mueller(a)ipfire.org> wrote:
> 
> Hello development folks,
> 
> while working on the linux-firmware update for Core Update 168 yesterday, I realised it
> comes with CPU microcodes for Intel and AMD as well (which kind of makes sense for a bundled
> conglomerate of firmware, I guess).

I cannot find any microcode for Intel processors in Linux firmware. That comes entirely out of the intel microcode package that we ship.

AMD however is part of linux-firmware:

  https://git.ipfire.org/?p=thirdparty/linux-firmware.git;a=tree;f=amd-ucode;h=eacd0a5d489f0c953461a5d5023e7ed448c43529;hb=refs/heads/main

> This means that either the CPU microcodes in linux-firmware or the dedicated LFS files
> for Intel and AMD microcode is redundant. Can we just drop the latter? Or did I overlook
> something?

So in my opinion, we will need to ship both.

Please remember to re-generate the initramdisks because they contain a copy of the microcode.

-Michael

> 
> Thanks, and best regards,
> Peter Müller