The following table shows the revision history for this document.
| Section | Revision Summary |
|---|---|
| 08/04/2026 Version 1.4 | |
| Timestamping and Synchronization | Added. No technical content. |
| PPS | Added. |
| Configuration Parameters | Added boot_image parameter. |
| Updating the Firmware from the Host OS | Retitled. No technical content updates. |
| Updating the Firmware Using PLDM | Added. |
| 07/24/2026 Version 1.3 | |
| Configuring Auto-Negotiation | Removed notice that auto-negotiation is not yet mature. |
| 07/01/2026 Version 1.2 | |
| General updates | Rearranged content:
|
| X4522 SFP56 Adapter Port Modes | Added details for speeds and encodings. |
| X4542 QSFP56 Adapter Port Modes | Added details for speeds and encodings. |
| Status LEDs | Updated for flashing LED. |
| Firmware Variants | Added. |
| Configuring Jumbo Frames | Added that jumbo frames might be silently dropped on Express datapath. |
| Linux ethtool Statistics | Added missing X4 statistics, removed non-X4 statistics. |
| Virtualization with KVM and SR-IOV | Added. |
| 01/20/2026 Version 1.1 | |
| X4542 Single 4 × 25 GbE Port | Added figure showing disabled cage. |
| Reconfiguring the Adapter | Restructured and updated to add amdsfboot. |
| Updating the Firmware from the Host OS | Restructured and updated to add amdsfupdate. |
| Linux ethtool Statistics | Updated description of port_rx_dp_di_dropped_packets. Added note about CRC counters. |
| References | Added Cabling Guide. |
| 10/24/2025 Version 1.0 | |
| Initial release. | N/A |