MMIO HXG MESSAGE(9)

💅 MMIO HXG Message(9)

okay so welcome to the Kernel API Manual, bestie — this is the MMIO HXG Message(9) page, and it's lowkey a short one. The format of the MMIO messages follows the definitions of HXG Message_ — yes, that exact cross-reference, no cap.

The first layout table is headed Bits and Description. The row has 0 and 31:0, and the Description cell is blank — not me forgetting it, it's literally empty in the source 🙈.

• Bits entry: 0
• Next value: 31:0
• Description: (no description text in the source table)

Then comes the embedded message situation, and it's giving:

• ...
• [Embedded `HXG Message`_]
• n
• 31:0

👀 SEE ALSO

• Kernel file ./drivers/gpu/drm/xe/abi/guc_communication_mmio_abi.h — the ABI header path, exactly as written.
• GuC MMIO based communication(9) — another reference for your reading list, periodt.

Source/version: ./drivers/gpu/drm/xe/abi · October 2026 — k bye, stay iconic 🫶💖