RE: [PATCH v2 2/3] KVM: PPC: epapr: Add idle hcall support for host

[Yoder Stuart-B08248 <B08248@xxxxxxxxxxxxx>]

> >> Hrm. This will return on signal. So if the guest sends an idle hcall,
> >> then user space gets a random signal, we'll continue executing the
> >> guest CPU, getting us out of idle even though the guest didn't expect it, since the guest
> really wants to get an interrupt after the idle hcall.
> >
> > Is that a problem though?   Won't it be just like a spurious interrupt where
> > the guest would wake up, see that there is nothing to do, and then
> > go idle again?   What is your concern here?
> 
> We would have changed state by enabling interrupts in the asm code.

What do you mean here, could you elaborate?

Stuart


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