iommu_group_claim_dma_owner(9)

okay bestie, welcome to the Kernel API Manual page for iommu_group_claim_dma_owner(9) 💅✨ this is the whole vibe: setting DMA ownership of a group, no cap.

💖 NAME 💖

iommu_group_claim_dma_owner — set the DMA ownership of a group, periodt.

✨ SYNOPSIS ✨

int iommu_group_claim_dma_owner (struct iommu_group *group , void *owner );

🎀 ARGUMENTS 🎀

• group — the group. that's it, that's the group 🫶
• owner — a caller-specified pointer; it's used for exclusive ownership. iykyk 💅

🦋 DESCRIPTION 🦋

okay so here's the tea: this interface is here to support backward compatibility for vfio, which manages the dma ownership at the iommu_group level. that's the whole reason it exists, bestie.

🚨 real talk: new invocations on this interface should be prohibited. and only a single owner may exist for a group — one group, one owner, no sharing, periodt 👑

💜 SEE ALSO 💜

the whole squad of related references 💖:

• Kernel file ./drivers/iommu/iommu.c
• iommu_device_register(9)
• iommu_insert_resv_region(9)
• iommu_group_alloc(9)
• iommu_group_get_iommudata(9)
• iommu_group_set_iommudata(9)
• iommu_group_set_name(9)
• iommu_group_add_device(9)
• iommu_group_remove_device(9)
• iommu_group_mutex_assert(9)
• iommu_group_for_each_dev(9)
• iommu_group_get(9)
• iommu_group_ref_get(9)
• iommu_group_put(9)
• iommu_group_id(9)
• device_iommu_capable(9)
• iommu_group_has_isolated_msi(9)
• iommu_set_fault_handler(9)
• iommu_paging_domain_alloc_flags(9)
• iommu_attach_device(9)
• iommu_get_domain_for_dev(9)
• iommu_driver_get_domain_for_dev(9)
• iommu_attach_group(9)
• iommu_unmap(9)
• iommu_unmap_fast(9)
• report_iommu_fault(9)
• iommu_get_resv_regions(9)
• iommu_put_resv_regions(9)
• iommu_setup_default_domain(9)
• iommu_device_use_default_domain(9)
• iommu_device_unuse_default_domain(9)
• iommu_device_claim_dma_owner(9)
• iommu_group_release_dma_owner(9)
• iommu_device_release_dma_owner(9)
• iommu_group_dma_owner_claimed(9)
• iommu_replace_device_pasid(9)
• iommu_attach_handle_get(9)
• iommu_attach_group_handle(9)
• iommu_detach_group_handle(9)
• iommu_replace_group_handle(9)
• pci_dev_reset_iommu_prepare(9)
• pci_dev_reset_iommu_done(9)
• iommu_dma_prepare_msi(9)

byeee bestie 💜 this page is signed off from source/version ./drivers/iommu, dated October 2026 — stay iconic 🫶✨