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Commit 50d8bce9 authored by Patrick Daly's avatar Patrick Daly
Browse files

ARM64: Kconfig: Ensure Kconfig option is selectable 



The ARM64_DMA_USE_IOMMU option was not selectable from the menuconfig
gui since it was not listed under a menu. Fix this.

Change-Id: Ieabc85fde23da8b2a7e32326f6c5fe3f48bc8a72
Signed-off-by: default avatarPatrick Daly <pdaly@codeaurora.org>
parent 169b18a3

arch/arm64/Kconfig

+31 −26
Original line number Diff line number Diff line
@@ -221,32 +221,6 @@ config NEED_SG_DMA_LENGTH 
config SMP

	def_bool y



config ARM64_DMA_USE_IOMMU

	bool

	select ARM_HAS_SG_CHAIN

	select NEED_SG_DMA_LENGTH



if ARM64_DMA_USE_IOMMU



config ARM64_DMA_IOMMU_ALIGNMENT

	int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"

	range 4 9

	default 8

	help

	  DMA mapping framework by default aligns all buffers to the smallest

	  PAGE_SIZE order which is greater than or equal to the requested buffer

	  size. This works well for buffers up to a few hundreds kilobytes, but

	  for larger buffers it just a waste of address space. Drivers which has

	  relatively small addressing window (like 64Mib) might run out of

	  virtual space with just a few allocations.



	  With this parameter you can specify the maximum PAGE_SIZE order for

	  DMA IOMMU buffers. Larger buffers will be aligned only to this

	  specified order. The order is expressed as a power of two multiplied

	  by the PAGE_SIZE.



endif



config SWIOTLB

	def_bool y
@@ -688,6 +662,37 @@ config ARCH_HAS_CACHE_LINE_SIZE 


source "mm/Kconfig"



config ARM64_DMA_USE_IOMMU

	bool "ARM64 DMA iommu integration"

	select ARM_HAS_SG_CHAIN

	select NEED_SG_DMA_LENGTH

	help

	  Enable using iommu through the standard dma apis.

	  dma_alloc_coherent() will allocate scatter-gather memory

	  which is made virtually contiguous via iommu.

	  Enable if system contains IOMMU hardware.



if ARM64_DMA_USE_IOMMU



config ARM64_DMA_IOMMU_ALIGNMENT

	int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"

	range 4 9

	default 8

	help

	  DMA mapping framework by default aligns all buffers to the smallest

	  PAGE_SIZE order which is greater than or equal to the requested buffer

	  size. This works well for buffers up to a few hundreds kilobytes, but

	  for larger buffers it just a waste of address space. Drivers which has

	  relatively small addressing window (like 64Mib) might run out of

	  virtual space with just a few allocations.



	  With this parameter you can specify the maximum PAGE_SIZE order for

	  DMA IOMMU buffers. Larger buffers will be aligned only to this

	  specified order. The order is expressed as a power of two multiplied

	  by the PAGE_SIZE.



endif



config SECCOMP

	bool "Enable seccomp to safely compute untrusted bytecode"

	---help---