Re: [PATCH] KVM: x86: Synchronize APIC State with QEMU when irqchip=split

[David Woodhouse]

On Wed, 2025-08-13 at 17:30 +0800, hugo lee wrote:
> 
> Sorry for the misleading, what I was going to say is
> do only cpu_synchroniza_state() in this new userspace exit reason
> and do nothing on the PIT.
> So QEMU will ignore the PIT as the guests do.
> 
> The resample is great and needed, but the synchronization
> makes more sense to me on this question.

So if the guest doesn't actually quiesce the PIT, QEMU will *still*
keep waking up to waggle the PIT output pin, it's just that QEMU won't
bother telling the kernel about it?

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