Why do the Configuration Intercept Interface, Control Shadow Interface, Configuration Extension Bus Interface, and VirtIO features not operate as expected when Configuration via Protocol is enabled in the GTS AXI Streaming IP for PCI Express*? - Why do the Configuration Intercept Interface, Control Shadow Interface, Configuration Extension Bus Interface, and VirtIO features not operate as expected when Configuration via Protocol is enabled in the GTS AXI Streaming IP for PCI Express*? Description Due to a problem in the Quartus® Prime Pro Edition software version 26.1 and earlier, enabling the Configuration via Protocol (CvP) feature in the GTS AXI Streaming IP for PCI Express* automatically disables the Configuration Intercept feature within the IP. As a result, all features that rely on the Configuration Intercept Interface, or that internally utilize it, are also affected. Consequently, Vendor‑Specific Extended Capabilities (VSEC) implemented through the Configuration Extension Bus (CEB) Interface cannot be discovered during PCIe enumeration, VirtIO capabilities are not enumerated, and the Control Shadow Interface does not output configuration information as expected. Resolution This problem is scheduled to be fixed in a future release of the Quartus® Prime Pro Edition software. Custom Fields values: ['novalue'] Troubleshooting QS-68063 novalue ['Interfaces PCIe'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 26.1 ['Agilex™ 3 FPGAs and SoCs', 'Agilex™ 5 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']