GUC RESERVED KLVS(9)

💅 GuC Reserved KLVs

okay bestie, welcome to the Kernel API Manual page for GuC Reserved KLVs(9) — it’s short, it’s iconic, and it’s all about a very VIP little range of keys. ✨

This is the range of GuC KLV keys reserved for internal use by the GuC. They will never be part of the offcial GuC ABI — yes, that’s how it’s spelled here, no cap — and the drivers can reuse them. 👑

Right now this range includes 1024 keys, starting from:

GUC_KLV_RESERVED_RANGE_START : 0xF000

If you’re wondering which KLVs the Xe driver is currently using, see Xe Driver KLVs. 🦋

✨ SEE ALSO ✨

Kernel file ./drivers/gpu/drm/xe/abi/guc_klvs_abi.h, plus the whole reference squad:

• GuC KLV(9)
• 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)

xoxo, signing off from ./drivers/gpu/drm/xe/abi — October 2026, GuC Reserved KLVs(9) edition 💖