linux-kernel - Re: x86/amd late microcode thread loading slows down boot

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Message-ID: <20241107153036.GCZyzdHEwm9-LPQOzY@fat_crate.local>
Date: Thu, 7 Nov 2024 16:30:36 +0100
From: Borislav Petkov <bp@...en8.de>
To: Andrew Cooper <andrew.cooper3@...rix.com>
Cc: thomas.de_schampheleire@...ia.com, linux-kernel@...r.kernel.org,
	x86@...nel.org
Subject: Re: x86/amd late microcode thread loading slows down boot

On Wed, Nov 06, 2024 at 06:50:12PM +0000, Andrew Cooper wrote:
> I recognise those symptoms.
> 
> https://xenbits.xen.org/gitweb/?p=xen.git;a=commitdiff;h=f19a199281a23725beb73bef61eb8964d8e225ce
> 
> We found it in Xen in 2019, and were instructed by AMD to insert a TLB
> flush immediately after patchloading.

Thanks for saving me some wild goose chasing...

Thomas, do you want a diff to try?

Thx.

-- 
Regards/Gruss,
    Boris.

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