KVM: VMX: refactor IRQ and NMI window enabling
do_interrupt_requests and vmx_intr_assist go different way for achieving the same: enabling the nmi/irq window start notification. Unify their code over enable_{irq|nmi}_window, get rid of a redundant call to enable_intr_window instead of direct enable_nmi_window invocation and unroll enable_intr_window for both in-kernel and user space irq injection accordingly. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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