iopt_unmap_iova(9)

💅 iopt_unmap_iova(9) 💅

okay bestie, welcome to this Kernel API Manual page 🫶 we’re talking about iopt_unmap_iova, and yes, she’s here to remove a range of iova. iconic behavior.

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✨ NAME ✨

iopt_unmap_iova — Remove a range of iova 💖

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🌸 SYNOPSIS 🌸

int iopt_unmap_iova (struct io_pagetable *iopt , unsigned long iova ,
       unsigned long length , unsigned long *unmapped );

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🎀 ARGUMENTS 🎀

• iopt — the io_pagetable to act on, bestie 🪄
• iova — Starting iova to unmap 📍
• length — Number of bytes to unmap 📏
• unmapped — Return number of bytes unmapped 🔁

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🦋 DESCRIPTION 🦋

okay so the requested range has to be a superset of the existing ranges. like, it’s giving “cover the whole vibe or don’t come” ✨

Splitting/truncating IOVA mappings is not allowed, periodt 💀 no cap.

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👑 SEE ALSO 👑

• Kernel file: ./drivers/iommu/iommufd/io_pagetable.c 🧚
• iopt_map_user_pages(9)
• iopt_map_file_pages(9)
• iopt_unfill_domain(9)
• iopt_fill_domain(9)
• iopt_area_split(9)

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fr fr, this page’s source/version is ./drivers/iommu/iommufd, and it’s dated October 2026 🎀💜 slay, go read the kernel file if you need more iykyk energy ⭐