From 46d1fb072e76b161b0fb1ada9e37bf7e4d1f123f Mon Sep 17 00:00:00 2001 From: Sven Peter Date: Tue, 3 Aug 2021 14:16:51 +0200 Subject: 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: Alyssa Rosenzweig Signed-off-by: Sven Peter Link: https://lore.kernel.org/r/20210803121651.61594-4-sven@svenpeter.dev Signed-off-by: Joerg Roedel --- drivers/iommu/Kconfig | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'drivers/iommu/Kconfig') diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index c84da8205be7..dfe81da483e9 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -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" -- cgit v1.2.3