EXT_IRQ_EXTERNAL_CALL
if (register_external_irq(EXT_IRQ_EXTERNAL_CALL, do_ext_call_interrupt))
case EXT_IRQ_EXTERNAL_CALL:
vcpu->arch.sie_block->eic = EXT_IRQ_EXTERNAL_CALL;
rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,