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iommu/dart: Add DART iommu driver

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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: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Signed-off-by: Sven Peter <sven@svenpeter.dev>
Link: https://lore.kernel.org/r/20210803121651.61594-4-sven@svenpeter.dev
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Sven Peter
2021-08-03 14:16:51 +02:00
committed by Joerg Roedel
parent 9d9cafb45c
commit 46d1fb072e
4 changed files with 939 additions and 0 deletions
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14
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"