KVM guest interrupts, traps, and, exceptions

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Hi Avi,

I'm continuing my journey through the KVM API documentation and I'm now scratching my head on how interrupts, traps, and exceptions are supported by the API. I see KVM_CREATE_IRQCHIP and KVM_IRQ_LINE but I'm unable to work out how the host is notified of such events. For example, if the guest does

  int $0x10

is there some KVM_EXIT "exit reason" like we have for IO? Is there some other mechanism for that? As I haven't yet set up anything related to IRQs I can see the host just deadlock on user interrupts.

			Pekka
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