hwaddr memory_region_section_get_iotlb(CPUState *cpu,
                                       MemoryRegionSection *section)
{
    AddressSpaceDispatch *d = flatview_to_dispatch(section->fv);
    return section - d->map.sections;
}
hwaddr memory_region_section_get_iotlb(CPUState *cpu,
                                       MemoryRegionSection *section)
{
    AddressSpaceDispatch *d = flatview_to_dispatch(section->fv);
    return section - d->map.sections;
}