VFIO_GET_API_VERSION(9)

💖 VFIO_GET_API_VERSION(9) 💖

okay bestie, welcome to the Kernel API Manual, section 9 — today's main character is VFIO_GET_API_VERSION, and honestly? she's a vibe. tiny page, huge energy. let's get into it 🫶

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✨ NAME ✨

VFIO_GET_API_VERSION — it's literally just _IO(VFIO_TYPE, VFIO_BASE + 0), no cap. that's the whole name. that's her. 💅

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🌸 SYNOPSIS 🌸

VFIO_GET_API_VERSION

yes that's it. she's lowkey a one-liner icon and we respect it 👑

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🦋 DESCRIPTION 🦋

so what does she do? she reports the version of the VFIO API — like, the whole API, not just a lil corner of it.

and here's why that matters: having a version number means that later, if the kernel devs ever need to add or change features in ways that are incompatible, they can bump the entire API version instead of quietly breaking everything. it's giving future-proofing. it's giving "we planned ahead so you don't wake up to a broken driver." main character foresight, honestly. ⭐

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🎀 RETURN 🎀

what comes back is VFIO_API_VERSION 💖

and the availability situation? Always. like, always always. fr fr. 🌈

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💜 SEE ALSO 💜

go read the kernel file ./include/uapi/linux/vfio.h — that's the source of truth, iykyk 📖

then go say hi to the whole friend group:

• VFIO_CHECK_EXTENSION(9)
• VFIO_SET_IOMMU(9)
• VFIO_GROUP_SET_CONTAINER(9)
• VFIO_GROUP_UNSET_CONTAINER(9)
• VFIO_GROUP_GET_DEVICE_FD(9)
• struct vfio_region_gfx_edid(9)
• VFIO_DEVICE_RESET(9)
• VFIO_DEVICE_GET_GFX_DMABUF(9)
• VFIO_IOMMU_SPAPR_UNREGISTER_MEMORY(9)

literal legends, every single one 🙈🔥

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okay that's the whole page, bestie — short, sweet, and absolutely ate 💀✨

sign-off time: this cutie lives over in ./include/uapi/linux, dated October 2026, and she's filed under VFIO_GET_API_VERSION(9). mwah 💋🎀