On Fri, Aug 27, 2010 at 12:44:41PM +0300, Avi Kivity wrote:
> >Thinking about the implications: Independent of virtualization, this
> >means that no code code can in any way rely on the STI shadow if there
> >are NMIs present that could "consume" it. Because after return from
> >those NMIs, interrupts could then be injected on the instruction that
> >was originally under the shadow.
> >
>
> Wow. Maybe we should request an interrupt window instead when
> blocked-by-STI is active instead of clearing it.
>
Wow indeed. We can remember blocked by sti state before injecting NMI
and request nmi window open exit. When we get nmi window open exit we
can restore blocked by sti flag.
--
Gleb.
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