iommu_group_get_iommudata(9)

🎀 iommu_group_get_iommudata(9) 🎀

okay bestie, welcome to the Kernel API Manual page for iommu_group_get_iommudata(9) — yes, that's the whole title, and yes, we're gonna get through it together. it's giving very specific kernel lore, and honestly? iconic. 💅

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🌸 NAME 🌸

iommu_group_get_iommudata — retrieve the iommu_data registered for a group. yep, that's literally the whole vibe: you got a group, it got some data registered on it, and this function hands it back to you. 🫶

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✨ SYNOPSIS ✨

void * iommu_group_get_iommudata (struct iommu_group *group );

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🫶 ARGUMENTS 🫶

• group — the group. that's it. that's the argument. the group in question, periodt. 💖

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💖 DESCRIPTION 💖

so here's the tea: iommu drivers can store data in the group for use when doing iommu operations. like, they stash their little iommu_data situation in there for later. this function is literally the retrieval hook for that data — it provides a way to retrieve it. no cap.

bestie, important: the caller should hold a group reference. don't be out here skipping that, fr fr. 😭

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🔥 SEE ALSO 🔥

also lowkey check out the kernel file itself — ./drivers/iommu/iommu.c — and all these other pages, iykyk:

• iommu_device_register(9)
• iommu_insert_resv_region(9)
• iommu_group_alloc(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_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)

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okay that's the page, mwah 💋 — signing off from source ./drivers/iommu, dated October 2026, page iommu_group_get_iommudata(9), from the Kernel API Manual. slay, go hold that group reference. 💅✨