Commit 46d1fb07 authored by Sven Peter's avatar Sven Peter Committed by Joerg Roedel
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iommu/dart: Add DART iommu driver 



Apple's new SoCs use iommus for almost all peripherals. These Device
Address Resolution Tables must be setup before these peripherals can
act as DMA masters.

Tested-by: default avatarAlyssa Rosenzweig <alyssa@rosenzweig.io>
Signed-off-by: default avatarSven Peter <sven@svenpeter.dev>
Link: https://lore.kernel.org/r/20210803121651.61594-4-sven@svenpeter.dev


Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 9d9cafb4

MAINTAINERS

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@@ -1267,6 +1267,7 @@ M: Sven Peter <sven@svenpeter.dev> 
L:	iommu@lists.linux-foundation.org

S:	Maintained

F:	Documentation/devicetree/bindings/iommu/apple,dart.yaml

F:	drivers/iommu/apple-dart.c









APPLE SMC DRIVER









M:	Henrik Rydberg <rydberg@bitmath.org>
































drivers/iommu/Kconfig



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@@ -290,6 +290,20 @@ config SPAPR_TCE_IOMMU







	  Enables bits of IOMMU API required by VFIO. The iommu_ops









	  is not implemented as it is not necessary for VFIO.



















config APPLE_DART









	tristate "Apple DART IOMMU Support"









	depends on ARM64 || (COMPILE_TEST && !GENERIC_ATOMIC64)









	select IOMMU_API









	select IOMMU_IO_PGTABLE_LPAE









	default ARCH_APPLE









	help









	  Support for Apple DART (Device Address Resolution Table) IOMMUs









	  found in Apple ARM SoCs like the M1.









	  This IOMMU is required for most peripherals using DMA to access









	  the main memory.



















	  Say Y here if you are using an Apple SoC.



















# ARM IOMMU support









config ARM_SMMU









	tristate "ARM Ltd. System MMU (SMMU) Support"
































drivers/iommu/Makefile



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@@ -29,3 +29,4 @@ obj-$(CONFIG_HYPERV_IOMMU) += hyperv-iommu.o







obj-$(CONFIG_VIRTIO_IOMMU) += virtio-iommu.o









obj-$(CONFIG_IOMMU_SVA_LIB) += iommu-sva-lib.o io-pgfault.o









obj-$(CONFIG_SPRD_IOMMU) += sprd-iommu.o









obj-$(CONFIG_APPLE_DART) += apple-dart.o
























drivers/iommu/apple-dart.c
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