xe_device_asid_to_vm(9)

📦 version 7.3.1, in nixpkgs unstable

💅 xe_device_asid_to_vm(9) 💅

okay so bestie, welcome to the Kernel API Manual — this one is xe_device_asid_to_vm, and it lives in the 9 section (that's the kernel-functions girlies, iykyk). it's short, it's sweet, and it does exactly one thing. let's get into it ✨

🌸 NAME 🌸

xe_device_asid_to_vm — Find VM from ASID 🎀

like, that's the whole vibe. ASID in, VM out. no cap.

🦋 SYNOPSIS 🦋

struct xe_vm * xe_device_asid_to_vm (struct xe_device *xe , u32 asid );

look at her. one function, two arguments, returns a pointer. clean, minimal, iconic. 💅

🎀 ARGUMENTS 🎀

  • xe — the xe_device. yes literally. it's the xe device. she's the main character of the whole file and you're just passing her through 🫶
  • asid — the Address space ID, typed as a u32. this is the little number you're handing over so the function knows which VM you're looking for 🔍

✨ DESCRIPTION ✨

okay so here's what she does: she finds a VM from an ASID — and then, and this is the important part bestie, she takes a reference to that VM which the caller must drop. 😭

read that again. the caller must drop it. that reference is yours now. it's your responsibility. it's your child. if you don't drop it, that's a leak and that's not slay of you. ngl, this is the kind of thing that comes back to haunt you at 3am. 👑

and — reclaim safe. that's it, that's the note. she's reclaim safe fr fr. 🧚

🔥 RETURN 🔥

  • VM on success — yay!! you got her 💖
  • ERR_PTR on failure — the classic kernel sad-girl return value. check it with IS_ERR() before you go dereferencing anything, please, i'm begging 🙈

👑 SEE ALSO 👑

the whole friend group, in order, no one left out:

that's the whole group chat tagged in the post. go read them, they're all lowkey serving 📚💜

quick vibe check reminder: grab the VM, drop the reference, check for ERR_PTR. that's the whole assignment. periodt. 💀

and that's the page, bestie!! this one comes to you from the source tree at ./drivers/gpu/drm/xe, dated October 2026 — so happy reading, and may all your references be dropped on time 🌈💖🎀🦋

📦 where this page comes from