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| author | Rob Clark <robdclark@gmail.com> | 2017-08-09 10:43:04 -0400 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2017-08-15 17:34:49 +0200 |
| commit | 0ae349a0f33fb040a2bc228fdc6d60111455feab (patch) | |
| tree | 19a43227771e950ff70ae121a913d94e57fb57be /drivers/iommu/Kconfig | |
| parent | 2b03774bae5f95091dac125a492caad71644b6db (diff) | |
| download | lwn-0ae349a0f33fb040a2bc228fdc6d60111455feab.tar.gz lwn-0ae349a0f33fb040a2bc228fdc6d60111455feab.zip | |
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/Kconfig | 10 |
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 |