iommu_alloc_pages_sz(9)

💖 iommu_alloc_pages_sz(9) 💖

okay so bestie, welcome to the Kernel API Manual — yes that's the manual name, we're fancy here — and today's main character is iommu_alloc_pages_sz, a little function that's out here handing you pages like it's Oprah. 🎀

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✨ NAME ✨

iommu_alloc_pages_sz — the way it allocates a zeroed page of a given size from a specific NUMA node. that's it, that's the whole vibe. ✨

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🌸 SYNOPSIS 🌸

void * iommu_alloc_pages_sz (gfp_t gfp , size_t size );

literally just two arguments, no cap. look at her go 🫶

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🦋 ARGUMENTS 🦋

• gfp — the buddy allocator flags, iykyk. this is you telling the allocator how you want the memory served. 👑
• size — the memory size to allocate, and heads up bestie, this is rounded up to a power of 2. so don't come crying to me if you asked for something weird and got a nicer number back. 💅

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🧚 DESCRIPTION 🧚

it returns the virtual address of the allocated page. that's the tea. you give it flags and a size, you get back a virtual address, periodt. 💖

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🔥 SEE ALSO 🔥

• the kernel file ./drivers/iommu/iommu-pages.h
• struct ioptdesc(9)
• iommu_pages_list_add(9)
• iommu_pages_list_splice(9)
• iommu_pages_list_empty(9)

like, go read them, they're all in the same friend group fr fr 🫶

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ngl this one's short and sweet — no dangerous behaviour flagged in the source, no environment variables, no exit statuses, just vibes and a virtual address. 💜

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mwah, that's a wrap! this page lives under ./drivers/iommu and it's dated October 2026, so mark your calendar bestie 🗓️💅 — signed, sealed, delivered, and slaying ✨🎀🦋