iommu_attach_group(9)

📦 version 7.3.1, in nixpkgs unstable

💖 iommu_attach_group — bestie's guide to the Kernel API Manual 💖

okay so picture this: you've got an IOMMU domain, you've got an IOMMU group, and they're just standing there not knowing each other. tragic. this little function is the wingman. 🫶

✨ NAME ✨

iommu_attach_group — attach an IOMMU domain to an IOMMU group. that's the whole vibe. matchmaker energy, fr fr. 💅

🌸 SYNOPSIS 🌸

int iommu_attach_group (struct iommu_domain *domain , struct iommu_group
*group );

literally just hand it the two things and let it cook. ✨

🎀 ARGUMENTS 🎀

  • domain — the IOMMU domain you wanna attach. the main character of this operation ngl. 👑
  • group — the IOMMU group that will be attached. the other half of the ship. 🦋

💜 DESCRIPTION 💜

so here's the tea: it returns 0 on success and an error code on failure. like, that's it, that's the contract. no cap. 😭

⚠️ but listen — one thing you actually need to know: EINVAL can be treated as a soft failure. it's not a "everything is doomed" situation, it's more like "this particular configuration of the domain is incompatible with this particular group." 💀

and the iconique part? in that EINVAL case, attaching a different domain to the group may succeed. so don't spiral, just try another one. slay. 🔥

🌈 SEE ALSO 🌈

Kernel file ./drivers/iommu/iommu.c — and bestie, there is a whole friend group here, so buckle up:

and that's the page!! 🧚 this one lives over in ./drivers/iommu, dated October 2026, and yes it's still called iommu_attach_group(9) — go read the whole family, iykyk 💖

📦 where this page comes from