xe_guc_ct_enable(9)

📦 version 7.3.1, in nixpkgs unstable

💅 xe_guc_ct_enable(9) — the Kernel API Manual page bestie 💅

Okay so first things first, this is from the Kernel API Manual, and the whole entire page is about xe_guc_ct_enable — yes that's a lot of letters, we'll get through it together 🫶

✨ NAME ✨

xe_guc_ct_enable — literally just: Enable GuC CT. That's the whole vibe. Short, sweet, iconic 👑

🌸 SYNOPSIS 🌸

int xe_guc_ct_enable (struct xe_guc_ct *ct );

That's it. One function, one argument, returns an int. Clean. Minimal. Main character energy fr fr.

🎀 ARGUMENTS 🎀

  • ct — the xe_guc_ct. Yep. That's the description. It's a struct xe_guc_ct * and it's the thing you're enabling. No notes, no cap 💀

🦋 DESCRIPTION 🦋

Okay so what does this thing actually do? Two whole jobs, bestie:

  • It enables GuC CT, bringing it to an empty state 🧹
  • Then it issues a CT register MMIO command 📡

That's the tea. Empty state first, then the MMIO command gets issued. Slay ✨

⭐ RETURN ⭐

  • 0 — success, we ate 🍓
  • a negative errno — on failure 😭 check that errno value, it's telling you something

👑 SEE ALSO 👑

Everything's here in ./drivers/gpu/drm/xe/xe_guc_ct.c — the source file, the mothership, the blueprint 💜 And also all these sibling functions, go say hi to them:

Like, look at that family tree. Gorgeous 🌈

One (1) tiny thing: the manpage source line here literally wraps Kernel file ./drivers/gpu/drm/xe/xe_guc_ct.c onto the list right before GuC CTB Blob(9), so that's exactly how we're rolling with it 💖

Okay that's the page!! Signing off from ./drivers/gpu/drm/xe, this is the October 2026 edition of the Kernel API Manual — stay hydrated, read your errno values, and remember: a negative return is not a personality flaw, it's data 🧚💜

📦 where this page comes from