flush_iotlb_page(9)

💅 flush_iotlb_page(9) — like, the Kernel API Manual moment 🎀

okay bestie, gather round, because this one's a tiny little function with main-character energy ✨ It's flush_iotlb_page, and it lives in the Kernel API Manual, and it does exactly one thing but it does it flawlessly.

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✨ NAME ✨

flush_iotlb_page — clear an iommu tlb entry 🧹💖

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🌸 SYNOPSIS 🌸

void flush_iotlb_page (struct omap_iommu *obj , u32 da );

no cap, that's the whole signature. two args, zero drama, void return because it gives nothing back and expects nothing in return. iconic behavior honestly 👑

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🦋 ARGUMENTS 🦋

• obj — the target iommu. like, the one you're talking to. your iommu bestie 🫶
• da — the iommu device virtual address. this is the address in question. the moment. the vibe check target 📍

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💜 DESCRIPTION 💜

so what it does: it clears an iommu tlb entry which includes 'da' address. periodt. 🔥

that's it. that's the function. any tlb entry that covers the da address you handed it? gone. cleared. not me clearing tlb entries on a friday night 💀✨

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🌈 SEE ALSO 🌈

the whole friend group, fr fr — start with the kernel file ./drivers/iommu/omap-iommu.c, then go meet everybody else:

• to_omap_domain(9)
• omap_iommu_save_ctx(9)
• omap_iommu_restore_ctx(9)
• load_iotlb_entry(9)
• flush_iotlb_all(9)
• omap_iopgtable_store_entry(9)
• iopgtable_lookup_entry(9)
• iopgtable_clear_entry(9)
• omap_iommu_attach(9)
• omap_iommu_detach(9)
• omap_iommu_domain_deactivate(9)
• omap_iommu_domain_activate(9)
• omap_iommu_runtime_suspend(9)
• omap_iommu_runtime_resume(9)
• omap_iommu_prepare(9)

like a whole squad of iommu functions, and they all ate 💅

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ngl bestie, this is straight from ./drivers/iommu and it's dated October 2026 — so go read it and tell me it's not the cutest kernel page you've ever seen 🌸🍓

k bye, love u, go flush some tlb entries 💖🧚⭐