iommu_debugfs_setup(9)

✨ iommu_debugfs_setup 💅

okay so bestie, welcome to the iommu_debugfs_setup(9) page — it's from the Kernel API Manual and it's honestly a little one-function wonder, so let's get into it 🎀

🌸 NAME 🌸

iommu_debugfs_setup — literally just creates the top-level iommu directory in debugfs, that's the whole job 🫶

✨ SYNOPSIS ✨

void iommu_debugfs_setup (void );

🦋 ARGUMENTS 🦋

• void — no arguments, bestie. zero. none. it takes nothing and it slays 💅

👑 DESCRIPTION 👑

So here's the vibe: this function gives you the base enablement for using debugfs to expose internal data of an IOMMU driver. When you call it, it creates the /sys/kernel/debug/iommu directory — that's it, that's the moment ✨

Also, and this is important, it will emit a strong warning at boot time to indicate that this feature is enabled. So yeah, expect to be loudly informed 🙈

This function is called from iommu_init. After that, drivers may then use iommu_debugfs_dir to instantiate a vendor-specific directory, and that's the one they use to expose internal data. iykyk 🧚

🌈 SEE ALSO 🌈

• Kernel file ./drivers/iommu/iommu-debugfs.c — go read it, it's giving source of truth 💖

and that's the whole page, fr fr 🌸 — this cutie came out of ./drivers/iommu, dated October 2026, and it's filed under iommu_debugfs_setup(9). periodt 💜