Fast PCI Express Endpoint Enumeration using Tandem Configuration is not supported. This use case addresses the ability to initially load a fully configurable PCI Express protocol solution from a small external ROM, so as to meet the 100 ms enumeration requirement. Support for Tandem Configuration for the PL PCIE block in Versal ACAP is not currently planned.
Note: Any user design requiring fast PCIe enumeration or configuration through PCIe should use the PCIe controllers in the CPM. Not all Versal ACAP contain this particular resource. For details, see Versal ACAP CPM Mode for PCI Express Product Guide (PG346).