CONFIG_DMA_RESTRICTED_POOL: DMA Restricted Pool

General informations

The Linux kernel configuration item CONFIG_DMA_RESTRICTED_POOL:

• prompt: DMA Restricted Pool
• type: bool
• depends on: CONFIG_OF && CONFIG_OF_RESERVED_MEM && CONFIG_SWIOTLB
• defined in kernel/dma/Kconfig
• found in Linux kernels: 5.15–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

This enables support for restricted DMA pools which provide a level of DMA memory protection on systems with limited hardware protection capabilities, such as those lacking an IOMMU.

For more information see <Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt> and <kernel/dma/swiotlb.c>. If unsure, say "n".

Hardware

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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