On Mon, Aug 24, 2009 at 09:19:05PM +0300, Gleb Natapov wrote:
> > > It is obviously wrong thing to do from assigned devices POV.
> >
> > Thats not entirely clear to me. So what happens if a guest with PIC
> > assigned device resets with a pending IRR? The host interrupt line will
> > be kept disabled, even though the guest is able to process further
> > interrupts?
> The host interrupt line will be enabled (assigned device ack notifier
> does this) without clearing interrupt condition in assigned device
> (guest hasn't acked irq so how can we be sure it ran device's irq
> handler?). Host will hang.
>
Actually, on the second thought, it will not hang. Next time host
interrupt handler runs it will disable interrupt once again.
--
Gleb.
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