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authorRob Clark <robdclark@gmail.com>2017-08-09 17:43:04 +0300
committerJoerg Roedel <jroedel@suse.de>2017-08-15 18:34:49 +0300
commit0ae349a0f33fb040a2bc228fdc6d60111455feab (patch)
tree19a43227771e950ff70ae121a913d94e57fb57be /drivers/iommu/Kconfig
parent2b03774bae5f95091dac125a492caad71644b6db (diff)
downloadlinux-0ae349a0f33fb040a2bc228fdc6d60111455feab.tar.xz
iommu/qcom: Add qcom_iommu
An iommu driver for Qualcomm "B" family devices which do implement the ARM SMMU spec, but not in a way that is compatible with how the arm-smmu driver is designed. It seems SMMU_SCR1.GASRAE=1 so the global register space is not accessible. This means it needs to get configuration from devicetree instead of setting it up dynamically. In the end, other than register definitions, there is not much code to share with arm-smmu (other than what has already been refactored out into the pgtable helpers). Signed-off-by: Rob Clark <robdclark@gmail.com> Tested-by: Riku Voipio <riku.voipio@linaro.org> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/Kconfig')
-rw-r--r--drivers/iommu/Kconfig10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index f73ff28f77e2..92f5fd2e0e4b 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -367,4 +367,14 @@ config MTK_IOMMU_V1
if unsure, say N here.
+config QCOM_IOMMU
+ # Note: iommu drivers cannot (yet?) be built as modules
+ bool "Qualcomm IOMMU Support"
+ depends on ARCH_QCOM || COMPILE_TEST
+ select IOMMU_API
+ select IOMMU_IO_PGTABLE_LPAE
+ select ARM_DMA_USE_IOMMU
+ help
+ Support for IOMMU on certain Qualcomm SoCs.
+
endif # IOMMU_SUPPORT