Re: [Xen-devel] Interrupt synchronisation and HVM

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 25/7/08 08:02, "James Harper" <james.harper@xxxxxxxxxxxxxxxx> wrote:

> Just to clarify, if I have masked the interrupts via
> HVM_PARAM_CALLBACK_IRQ = 0, it is safe to do nothing when the interrupt
> occurs right? I don't need to unset the 'pending' bits or anything?

Yes, as soon as HVM_PARAM_CALLBACK_IRQ=0 the 'interrupt wire' is
de-asserted. You only get a single spurious interrupt if the wire status was
latched by the PIC or IO-APIC before you cleared HVM_PARAM_CALLBACK_IRQ.

 -- Keir



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