Re: [PATCH v4] KVM: x86: Add x2APIC "features" to control EOI broadcast suppression

[David Woodhouse]

On Fri, 2025-12-12 at 08:27 +0000, Khushit Shah wrote:
> 
> 
> > On 12 Dec 2025, at 1:49 PM, David Woodhouse <dwmw2@xxxxxxxxxxxxx> wrote:
> > 
> > On Fri, 2025-12-12 at 08:16 +0000, Khushit Shah wrote:
> > > I thought the earlier discussion preferred
> > > kvm_lapic_ignore_suppress_eoi_broadcast(), but
> > > I’m not tied to it.
> > 
> > I think some of that earlier discussion was 'informed' by me typing
> > code into my mailer, and managing to type an example whose name implied
> > the exact opposite of what the code actually returned. :)
> > 
> 
> Got it :), How about kvm_lapic_respect_suppress_eoi_broadcast()? It avoids the 
> double-negative and keeps the semantics clear.

Sure. That gives us fairly clear separate helpers (in a .h file) which
control whether we *advertise* it, and whether we really *do* it.

With them giving consistent 'true' and 'false' for 'ENABLE' and
'DISABLE' modes respectively, and being *inconsistent* for the 'QUIRK'
mode.

You could even use the same switch() structure for both, with only the
default: case being different, to make it crystal clear what's going
on.

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