__uml_vfio_cfgspace_read
return __uml_vfio_cfgspace_read(dev, offset, size);
pos = __uml_vfio_cfgspace_read(dev, PCI_CAPABILITY_LIST, sizeof(pos));
ent = __uml_vfio_cfgspace_read(dev, pos, sizeof(ent));
tbl = __uml_vfio_cfgspace_read(dev, off + PCI_MSIX_TABLE, sizeof(tbl));
flags = __uml_vfio_cfgspace_read(dev, off + PCI_MSIX_FLAGS, sizeof(flags));