stable v6.6.24 regression: boot fails: bisected to "x86/mpparse: Register APIC address only once"

[Wolfgang Walter <linux@stwm.de>]

Hello,

after upgrading to v6.6.24 from v6.6.23 some old boxes (i686; Intel 
Celeron M) stop to boot:

They hang after:

Decompressing Linux... Parsing ELF... No relocation needed... done.
Booting the kernel (entry_offset: 0x00000000).

After some minutes they reboot.

I bisected this down to

commit bebb5af001dc6cb4f505bb21c4d5e2efbdc112e2
Author: Thomas Gleixner <tglx@linutronix.de>
Date:   Fri Mar 22 19:56:39 2024 +0100

     x86/mpparse: Register APIC address only once

     [ Upstream commit f2208aa12c27bfada3c15c550c03ca81d42dcac2 ]

     The APIC address is registered twice. First during the early 
detection and
     afterwards when actually scanning the table for APIC IDs. The APIC 
and
     topology core warn about the second attempt.

     Restrict it to the early detection call.

     Fixes: 81287ad65da5 ("x86/apic: Sanitize APIC address setup")
     Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
     Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
     Tested-by: Guenter Roeck <linux@roeck-us.net>
     Link: 
https://lore.kernel.org/r/20240322185305.297774848@linutronix.de
     Signed-off-by: Sasha Levin <sashal@kernel.org>


Reverting this commit in v6.6.24 solves the problem.

Regards,
-- 
Wolfgang Walter
Studierendenwerk München Oberbayern
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