KVM_FAST_MMIO_BUS
ret = kvm_io_bus_write(vcpu, KVM_FAST_MMIO_BUS, (gpa_t) gpa, 0,
!kvm_io_bus_write(vcpu, KVM_FAST_MMIO_BUS, gpa, 0, NULL)) {
if (!kvm_io_bus_write(vcpu, KVM_FAST_MMIO_BUS, gpa, 0, NULL)) {
!kvm_io_bus_write(vcpu, KVM_FAST_MMIO_BUS, gpa, 0, NULL)) {
ret = kvm_assign_ioeventfd_idx(kvm, KVM_FAST_MMIO_BUS, args);
kvm_deassign_ioeventfd_idx(kvm, KVM_FAST_MMIO_BUS, args);