__kvm_irqfd
int ret = __kvm_irqfd(vm, gsi, eventfd, flags);
r = __kvm_irqfd(vm1, 11, __eventfd, 0);
r = __kvm_irqfd(vm2, 12, __eventfd, 0);
r = __kvm_irqfd(vm, GSI_BASE_SECONDARY, eventfd, 0);
r = __kvm_irqfd(vm, GSI_BASE_SECONDARY + i, eventfd, KVM_IRQFD_FLAG_DEASSIGN);
r1 = __kvm_irqfd(vm, GSI_BASE_PRIMARY, eventfd, 0);
r2 = __kvm_irqfd(vm, GSI_BASE_PRIMARY + 1, eventfd, 0);