pamu_config_ppaace(9)

✨ pamu_config_ppaace ✨

ok so bestie, welcome to the Kernel API Manual 💖 this is a kernel API page, which means it's a (9) — very much main character territory, no cap. we're talking about pamu_config_ppaace, and yes, that name is a mouthful, but by the end you're gonna be obsessed with it fr fr 🎀

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🌸 NAME 🌸

pamu_config_ppaace — Sets up PPAACE entry for specified liodn 💅

like, it literally sets up a PPAACE entry. for a specified liodn. iconic behavior, honestly.

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🦋 SYNOPSIS 🦋

int pamu_config_ppaace (int liodn , u32 omi , u32 stashid , int prot );

four arguments, returns an int, that's the whole vibe check and it passes 🔥

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🎀 ARGUMENTS 🎀

• liodn — Logical IO device number ✨ this is the liodn you're setting the PPAACE entry up for, iykyk
• omi — Operation mapping index 🌈 and here's the important lil' caveat: if ~omi == 0 then omi not defined — so watch that bit, bestie
• stashid — cache stash id for associated cpu 🍓 and same kind of deal: if ~stashid == 0 then stashid not defined 👀
• prot — window permissions 🫶 that's your perms, periodt

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💜 DESCRIPTION 💜

so what does it do? Returns 0 upon success else error code < 0 returned 🌟

that's it, that's the description — a clean success/error situation. 0 means slay, anything less than 0 means 😭 so check your return value, always, ngl.

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💀 SEE ALSO 💀

go look at these, they're all in the same friend group:

• Kernel file ./drivers/iommu/fsl_pamu.c 📁
• pamu_get_ppaace(9)
• pamu_enable_liodn(9)
• pamu_disable_liodn(9)
• get_ome_index(9)
• get_stash_id(9)

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and that's the whole page, bestie 🧚💖

shoutout to ./drivers/iommu for hosting this legend, dated October 2026 — go forth and configure your PPAACE entries responsibly 👑🌈⭐