RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Liu, Jinsong writes ("RE: [Xen-devel] [PATCH] Fix hvm vcpu hotplug bug"):
> Per my understanding, sci-gpe logic is like
> [diagram]
>
> Currently qemu-xen didn't have 'gep event x OR gpe event y --> sci'
> logic, it should add this logic level.

Yes, thanks, I'd understood that.  But:

> To clear the interrupt:
> 1). gpe_sts x & gpe_en x --> low gpe event x

I think you mean "gpe_sts goes low" ?  Since your diagram is in terms
of levels and I guess "sts" is the actual interrupt source, and
"sts_en" is the interrupt enable flag.

So in real hardware, what makes gpe_sts go low ?

Ian.

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