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Subject: Re: Re: some kernel exceptions
From: Florian Bezdeka <florian.bezdeka@siemens.com>
To: Yxian Yao <yxianyao@126.com>
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Date: Wed, 28 Dec 2022 09:54:27 +0100
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On Wed, 2022-12-28 at 13:34 +0800, Yxian Yao wrote:
>=20
> Hi Florian,
> > >=20
> > > [    0.214734] ACPI: x2apic entry ignored
> >=20
> > CONFIG_X86_X2APIC is enabled in your kernel configuration?
> Yes, it's OK now after CONFIG_X86_X2APIC is enabled.

Great. Thanks for reporting back.

This means that at least HP stopped testing their firmware without
x2apic support in the OS. There should be "fallbacks" available on the
platform but for some reason Linux never reaches the point where it
would/could enable them.

Maybe recent Linux versions handle that case better but the firmware
still has to provide correct values in the hardware description (ACPI
tables on x86).

>=20
> Thanks.
>=20