Re: [PATCH v2 01/10] x86/Kconfig: enable X86_X2APIC by default and improve help text

[Thomas Gleixner]

On Wed, Oct 26 2022 at 20:38, Borislav Petkov wrote:
> On Sun, Sep 11, 2022 at 10:47:02AM +0200, Mateusz Jończyk wrote:
>> As many current platforms (most modern Intel CPUs and QEMU) have x2APIC
>> present, enable CONFIG_X86_X2APIC by default as it gives performance
>> and functionality benefits.
>
> Can we do that without any detriment to older systems which don't have
> x2APIC?

Can we please adjust to reality and do:

    X86_X2APIC
    bool
    default y if X86_64 && (IRQ_REMAP || HYPERVISOR_GUEST)

There is zero reason for having a knob.

Thanks,

        tglx