Unsupported Request Handling During Enumeration (Rootport)

If an unsupported request (UR) or configuration request retry status (CRS) is received for a configuration request, the PCIe Controller does not assert the SLVERR if the AXI features control register's SLVERRCTRL bit is set to 1. The returned data is:

• UR—32'hFFFF_FFFF
• CRS—32'hFFFF_0001