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CONFIG_SWIOTLB: Software IOTLB support

General informations

The Linux kernel configuration item CONFIG_SWIOTLB has multiple definitions:

found in arch/arm/Kconfig

The configuration item CONFIG_SWIOTLB:

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found in arch/arm64/Kconfig

The configuration item CONFIG_SWIOTLB:

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found in arch/ia64/Kconfig

The configuration item CONFIG_SWIOTLB:

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found in arch/mips/cavium-octeon/Kconfig

The configuration item CONFIG_SWIOTLB:

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found in arch/mips/netlogic/Kconfig

The configuration item CONFIG_SWIOTLB:

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found in arch/tile/Kconfig

The configuration item CONFIG_SWIOTLB:

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found in arch/unicore32/mm/Kconfig

The configuration item CONFIG_SWIOTLB:

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found in arch/x86/Kconfig

The configuration item CONFIG_SWIOTLB:

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Support for software bounce buffers used on x86-64 systems which don't have a hardware IOMMU. Using this PCI devices which can only access 32-bits of memory can be used on systems with more than 3 GB of memory. If unsure, say Y.

found in arch/x86_64/Kconfig

The configuration item CONFIG_SWIOTLB:

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Support for software bounce buffers used on x86-64 systems which don't have a hardware IOMMU (e.g. the current generation of Intel's x86-64 CPUs). Using this PCI devices which can only access 32-bits of memory can be used on systems with more than 3 GB of memory. If unsure, say Y.

SWIOTLB support found in arch/powerpc/Kconfig

The configuration item CONFIG_SWIOTLB:

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Support for IO bounce buffering for systems without an IOMMU. This allows us to DMA to the full physical address space on platforms where the size of a physical address is larger than the bus address. Not all platforms support this.

Soft IOMMU Support for All-Memory DMA found in arch/mips/loongson/Kconfig

The configuration item CONFIG_SWIOTLB:

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Software IOTLB support found in arch/x86_64/Kconfig

The configuration item CONFIG_SWIOTLB:

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Hardware

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