hl_mmu_hr_init(9)

📦 version 7.3.1, in nixpkgs unstable

💅 hl_mmu_hr_init — kernel API manual, bestie edition 🎀

okay so we're in the <pink>Kernel API Manual</pink> today and the star of the show is hl_mmu_hr_init(9) — yes she's a 9, yes she's iconic, no we're not intimidated ✨

🌸 NAME 🌸

hl_mmu_hr_init — literally just initializes the MMU module. that's it, that's the whole job, and she does it flawlessly 💅

🦋 SYNOPSIS 🦋

int hl_mmu_hr_init (struct hl_device *hdev , struct hl_mmu_hr_priv
*hr_priv , u32 hop_table_size , u64 pgt_size );

like look at that signature. four args. gorgeous. no notes 👑

💖 ARGUMENTS 💖

  • hdev — the habanalabs device structure. the whole device vibe, the main character fr fr.
  • hr_priv — MMU HR private data. it's giving private, it's giving data, we respect her privacy 🙈.
  • hop_table_size — HOP table size. yes, HOP. lowercase energy, uppercase importance 🐇.
  • pgt_size — the memory size allocated for the page table. how much room the page table gets to ~thrive~ 📏✨

🌈 DESCRIPTION 🌈

so what does she return? return 0 on success otherwise non-zero error code — classic, iconic, no cap 💀. zero means we ate, nonzero means ngl something went sideways.

this function does the following (and she does it all, because she's that girl):

  • Create a pool of pages for pgt_infos. a whole lil pool 🏊‍♀️💖
  • Create a shadow table for pgt. shadow table!! mysterious, dramatic, lowkey obsessed 🕶️✨

🫶 SEE ALSO 🫶

the kernel file lives right here, go say hi:

./drivers/accel/habanalabs/common/mmu/mmu.c

and the whole friend group, all of them, every single one, no skipping (i would never):

bestie real talk: she returns 0 on success and a non-zero error code otherwise — check it, don't ignore it, that's the vibe check 🚨💀

sign-off time 🎀 this page came from ./drivers/accel/habanalabs/com... and it's dated October 2026 — yes, the future, because she's ahead of her time ⭐💜 slay, periodt, bye bestie 🦋💖

📦 where this page comes from