HOST2GUC_SELF_CFG(9)

HOST2GUC_SELF_CFG 💅

Okay so this page is from the Kernel API Manual, and it’s literally the HOST2GUC_SELF_CFG message. This message is used by Host KMD to setup of the GuC Self Config KLVs_. It must be sent as an MMIO HXG Message_ — no cap. 🫶

✨ Request vibes ✨

Bits / Description 💅

• Row 0
  • Bits 31: ORIGIN = GUC_HXG_ORIGIN_HOST_
  • Bits 30:28: TYPE = GUC_HXG_TYPE_REQUEST_
  • Bits 27:16: DATA0 = MBZ
  • Bits 15:0: ACTION = GUC_ACTION_HOST2GUC_SELF_CFG = 0x0508
• Row 1
  • Bits 31:16: KLV_KEY — KLV key, see GuC Self Config KLVs_.
  • Bits 15:0: KLV_LEN — KLV length
    • 32 bit KLV = 1
    • 64 bit KLV = 2
• Row 2
  • Bits 31:0: VALUE32 — Bits 31-0 of the KLV value
• Row 3
  • Bits 31:0: VALUE64 — Bits 63-32 of the KLV value (KLV_LEN = 2)

✨ Response vibes ✨

Bits / Description 💅

• Row 0
  • Bits 31: ORIGIN = GUC_HXG_ORIGIN_GUC_
  • Bits 30:28: TYPE = GUC_HXG_TYPE_RESPONSE_SUCCESS_
  • Bits 27:0: DATA0 = NUM - 1 if KLV was parsed, 0 if not recognized

👀 SEE ALSO 👀

• Kernel file ./drivers/gpu/drm/xe/abi/guc_actions_abi.h
• HOST2GUC_CONTROL_CTB(9)

source/version vibes: the kernel docs path is ./drivers/gpu/drm/xe/abi, the date is October 2026, and the page tag is HOST2GUC_SELF_CFG(9) — periodt. 💖✨