iommu_insert_resv_region(9)

💖 NAME 💖

okay so bestie, meet iommu_insert_resv_region(9) from the Kernel API Manual — it inserts a new region in the list of reserved regions. literally that's the whole job. slay.

✨ SYNOPSIS ✨

int iommu_insert_resv_region (struct iommu_resv_region *new , struct
list_head *regions );

🎀 ARGUMENTS 🎀

• new — the new region to insert. it's the fresh little region in question.
• regions — list of regions. the guest list it gets added to.

🌸 DESCRIPTION 🌸

here's the vibe: elements are sorted by start address, and overlapping segments of the same type are merged. periodt.

👑 SEE ALSO 👑

Kernel file ./drivers/iommu/iommu.c, plus all these iconic pals:

• iommu_device_register(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_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)

that's the tea, bestie 💅 — from the Kernel API Manual, source ./drivers/iommu, dated October 2026. mwah 🦋