DMA Restricted Pool
configname: CONFIG_DMA_RESTRICTED_POOL
Linux Kernel Configuration
└─>Library routines
└─>DMA Restricted Pool
In linux kernel since version 5.2 (release Date: 2019-07-07)
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".
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".