amdgpu_hmm_range_valid(9)

📦 version 7.3.1, in nixpkgs unstable

💅 amdgpu_hmm_range_valid(9) 💅

okay so welcome to the Kernel API Manual, bestie — today's main character is amdgpu_hmm_range_valid, and honestly? she's a vibe check for memory ranges. let's get into it ✨

🌸 NAME 🌸

amdgpu_hmm_range_valid — check if an HMM range is still valid

🎀 SYNOPSIS 🎀

bool amdgpu_hmm_range_valid (struct amdgpu_hmm_range *range );

like, that's the whole call. one arg, one bool back. no cap, it's giving minimalist icon 💅

🫶 ARGUMENTS 🫶

  • range — pointer to the struct amdgpu_hmm_range you wanna validate. that's it, that's the tea 🍓

✨ DESCRIPTION ✨

so what does she actually do? she determines whether the given HMM range range is still valid by checking for invalidations via the MMU notifier sequence 🔥

basically, this is the "did anyone mess with my range while I wasn't looking" check. it's typically used to verify that the range has not been invalidated by concurrent address space updates before it gets accessed. like a little peek around the corner before you walk into the room — very main character energy, very responsible 👑

highkey important if you don't want to be out here touching memory that somebody else already yeeted 😭

💀 RETURN 💀

  • true — the range is valid and can be used safely 🎉
  • false — the range is NULL, or it has been invalidated 🙈

🦋 SEE ALSO 🦋

Kernel file ./drivers/gpu/drm/amd/amdgpu/amdgpu_hmm.c — plus the whole friend group:

they're all linked in the group chat, iykyk 💖

and that's the page, bestie 🧚 this lil slice of kernel lore lives in ./drivers/gpu/drm/amd/amdgpu, and it's stamped October 2026 — so like, future vibes but make it documentation ⭐ slay, go validate some ranges 💜

📦 where this page comes from