iommu_group_add_device(9)

💖 NAME 💖

okay so bestie, welcome to iommu_group_add_device(9) from the Kernel API Manual 💅 — and the whole vibe is literally adding a device to an iommu group. No cap. 🦋

✨ SYNOPSIS ✨

int iommu_group_add_device (struct iommu_group *group , struct device
       *dev );

🎀 ARGUMENTS 🎀

• group — the group you're adding the device into, and bestie, a reference should be held. 👑
• dev — the device. that's it, that's the argument. 💅

🌸 DESCRIPTION 🌸

okay so an iommu driver calls this function to add a device into a group. The way that adding a device increments the group reference count? iconic. It literally goes up. ✨

👑 SEE ALSO 👑

Kernel file: ./drivers/iommu/iommu.c — plus the whole little friend group, no cap:

• 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_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_group_claim_dma_owner(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)

mwah 💋 cute little footer sign-off: source/version is ./drivers/iommu, date is October 2026, and the page is iommu_group_add_device(9). byeee, go add that device bestie 🫶