Re: [RFC] ich9:cpuhp: add support for cpu hot-unplug with SMI broadcast enabled

[Ankur Arora]

On 2020-11-30 8:58 a.m., Laszlo Ersek wrote:
> On 11/28/20 00:48, Ankur Arora wrote:
>
> > It is possible that there are CPUs with bits for both is_inserting and
> > is_removing. In that case QemuCpuhpCollectApicIds() would put them in the
> > PluggedApicIds array and the unplug eventually happens in the next
> > firmware invocation.
> >
> > If a CPU has both is_inserting and fw_remove set, the firmware processes
> > the
> > hotplug in that invocation and the unplug happens whenever the OSPM
> > triggers
> > the firmware next.
>
> If these corner cases will actually work (I'm somewhat doubtful), that
> will be really great.

Heh, yeah. That's a big if. I'll see if I can hit it in my testing.

Thanks
Ankur