KVM_CAP_SPLIT_IRQCHIP
case KVM_CAP_SPLIT_IRQCHIP:
case KVM_CAP_SPLIT_IRQCHIP: {
if (r && errno == ENOTTY && kvm_has_cap(KVM_CAP_SPLIT_IRQCHIP))
vm_enable_cap(vm, KVM_CAP_SPLIT_IRQCHIP, 24);