iommu_pagin..._alloc_flags(9)

💖 NAME 💖

iommu_paging_domain_alloc_flags — bestie, this is the one that allocates a paging domain ✨

Ok so real talk, this page lives in the Kernel API Manual and it's giving "short but mighty". Let's get into it 🎀

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🌸 SYNOPSIS 🌸

struct iommu_domain * iommu_paging_domain_alloc_flags (struct device
*dev , unsigned int flags );

Look at her. One function, two arguments, zero drama. Iconic 👑

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🦋 ARGUMENTS 🦋

• dev — the device you're allocating this domain for. Like, whose domain is it? This one's. Main character device fr.
• flags — a bitmap of iommufd_hwpt_alloc_flags. Yes bestie, it's a bitmap, so you're passing flags in there, not just a single vibe.

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💅 DESCRIPTION 💅

So what does it do? It allocates a paging domain that's gonna be managed by a kernel driver. That's the whole thing. No cap.

And the return? If it works you get the allocated domain back 🫶. If it fails, you get an ERR pointer — so like, please actually check it with IS_ERR() and don't just rawdog the pointer, iykyk 😭.

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⭐ SEE ALSO ⭐

Buckle up babes, this list is long — but every single one of these is a real one and they all deserve their moment 💜

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_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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✨ And that's the whole page, bestie ✨

This cutie ships from ./drivers/iommu and it's dated October 2026 🗓️ so you know it's fresh. Go forth, allocate those paging domains, and check your ERR pointers 💀💖