iommu/arm: Add support for ARM Ltd. System MMU architecture
This patch adds support for SMMUs implementing the ARM System MMU
architecture versions 1 or 2. Both arm and arm64 are supported, although
the v7s descriptor format is not used.
Cc: Rob Herring <robherring2@gmail.com>
Cc: Andreas Herrmann <andreas.herrmann@calxeda.com>
Cc: Olav Haugan <ohaugan@codeaurora.org>
Cc: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Andreas Herrmann <andreas.herrmann@calxeda.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index c332fb9..957cfd4 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -261,4 +261,17 @@
default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
+config ARM_SMMU
+ bool "ARM Ltd. System MMU (SMMU) Support"
+ depends on ARM64 || (ARM_LPAE && OF)
+ select IOMMU_API
+ select ARM_DMA_USE_IOMMU if ARM
+ help
+ Support for implementations of the ARM System MMU architecture
+ versions 1 and 2. The driver supports both v7l and v8l table
+ formats with 4k and 64k page sizes.
+
+ Say Y here if your SoC includes an IOMMU device implementing
+ the ARM SMMU architecture.
+
endif # IOMMU_SUPPORT