A question about Irq injection

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Hi,

I am new to KVM code, and got a question in regards to Irq injection in vcpu_enter_guest in x86.c . I don't quite understand why inject_pending_event is called before making sure there is an Irq open window. And it seems to be executed once again after an Irq window exit because of the KVM_REQ_EVENT request made in handle_interrupt_window.

Any help would be much appreciated, though the question can silly to you guys. Thanks!--
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