STRUCT IOMMU_DIRTY_BITMAP(9)

💖 struct iommu_dirty_bitmap(9) 💖

okay so bestie, this is a page from the Kernel API Manual and it's literally just the shape of one struct — a little two-field bundle of joy that keeps track of dirty IOVA bitmap state. no cap, that's the whole vibe. it's giving "small but crucial" and we're obsessed 🎀

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✨ NAME ✨

struct iommu_dirty_bitmap — Dirty IOVA bitmap state 💅

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🦋 SYNOPSIS 🦋

struct iommu_dirty_bitmap {
    struct iova_bitmap *bitmap;
    struct iommu_iotlb_gather *gather;
};

look at her. two pointers, zero drama, main character energy ✨

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🌸 Members 🌸

so there's exactly two members and each one is doing its own iconic thing:

• bitmap — the IOVA bitmap, periodt. that's the actual dirty-tracking bitmap living in this struct 🗺️
• gather — range information for a pending IOTLB flush 🔥 like, the scoop on which range still needs flushing. it's not flushed yet, it's pending, iykyk.

ngl both of these are pointers, so this struct is lowkey just a cute little pair of references holding hands 🫶

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👑 SEE ALSO 👑

bestie, the cross-reference section is stacked. like, genuinely a whole friend group. every single one of these, no skipping 🙈

• Kernel file ./include/linux/iommu.h
• struct iommu_fault_page_request(9)
• struct iommu_fault(9)
• enum iommu_page_response_code(9)
• struct iommu_page_response(9)
• struct iopf_queue(9)
• struct iommu_resv_region(9)
• struct iommu_iotlb_gather(9)
• struct iommu_dirty_ops(9)
• struct iommu_user_data(9)
• struct iommu_user_data_array(9)
• __iommu_copy_struct_from_user(9)
• iommu_copy_struct_from_user(9)
• __iommu_copy_struct_from_user_array(9)
• iommu_copy_struct_from_user_array(9)
• iommu_copy_struct_from_full_user_array(9)
• __iommu_copy_struct_to_user(9)
• iommu_copy_struct_to_user(9)
• struct iommu_ops(9)
• struct iommu_domain_ops(9)
• struct iommu_device(9)
• struct iommu_fault_param(9)
• struct dev_iommu(9)
• iommu_iotlb_gather_is_disjoint(9)
• iommu_iotlb_gather_add_range(9)
• iommu_iotlb_gather_add_page(9)
• struct iommu_fwspec(9)
• struct iommu_sva(9)
• iommu_map_sgtable(9)

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okay that's the whole page, you ate that 💅✨ this one lives in ./include/linux and it's dated October 2026 — so yeah, hydrating, staying informed, reading your kernel headers. slay 🧚💜