GUC KLV(9)

🌸 GuC KLV 🌸

okay bestie, this is GuC KLV(9) from the Kernel API Manual, and the whole page is basically a bit-layout vibe check. No cap, every field matters. 💅

The table is giving Bits and Description columns, and here’s exactly what’s in them:

• entry 0 — the first chunk
  • bits 31:16 — KEY — KLV key identifier
    • GuC Self Config KLVs
    • GuC Opt In Feature KLVs
    • GuC Scheduling Policies KLVs
    • GuC VGT Policy KLVs
    • GuC VF Configuration KLVs
    • GuC Reserved KLVs
  • bits 15:0 — LEN — length of VALUE (in 32bit dwords)
• entry 1, bits 31:0 — VALUE — actual value of the KLV (format depends on KEY)
• ...
• entry n, bits 31:0 — VALUE — actual value of the KLV (format depends on KEY)

Like, that’s the whole layout — KEY and LEN in entry 0, then the VALUE dwords from 1 through n. Slay. ✨

👀 SEE ALSO 👀

• Kernel file ./drivers/gpu/drm/xe/abi/guc_klvs_abi.h
• GuC Global Config KLVs(9)
• GuC Self Config KLVs(9)
• GuC Opt In Feature KLVs(9)
• GuC Scheduling Policies KLVs(9)
• GuC VGT Policy KLVs(9)
• GuC VF Configuration KLVs(9)
• GuC Reserved KLVs(9)

source/version check, bestie: this page lives under ./drivers/gpu/drm/xe/abi, dated October 2026. mwah 💖