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Date: Fri, 22 Mar 2024 20:30:22 +0200
From: Ard Biesheuvel <ardb@...nel.org>
To: Clayton Craft <clayton@...ftyguy.net>
Cc: Hans de Goede <hdegoede@...hat.com>, x86@...nel.org, linux-kernel@...r.kernel.org, 
	linux-efi@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>, 
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, 
	Dave Hansen <dave.hansen@...ux.intel.com>, regressions@...ts.linux.dev
Subject: Re: x86_64 32-bit EFI mixed mode boot broken

On Fri, 22 Mar 2024 at 19:57, Clayton Craft <clayton@...ftyguy.net> wrote:
>
> March 22, 2024 at 9:51 AM, "Ard Biesheuvel" <ardb@...nel.org> wrote:
>
>
> > > As I mentioned initially, I bisected my failure to e2ab9eab32. Does that give
> > >
> > >  any hint about what might be the problem?
> > >
> >
> > Not at all, unfortunately. What we might try is to back out the
> >
> > changes step by step. I can prepare a branch for you if you like.
>
>
> Yeah sure, if you don't mind! I'd be happy to test changes in a branch to try and figure out what is causing this.
>

I have pushed a branch below that reverts the patch you identified in
4 separate steps. Could you please check which step makes your system
boot again?

https://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git/log/?h=efi-clayton

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