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| author | Will Deacon <will.deacon@arm.com> | 2015-05-27 17:25:59 +0100 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2015-05-29 11:12:01 +0200 |
| commit | 48ec83bcbcf5090fcdf74a6168f161d247492979 (patch) | |
| tree | 5251d208da543362a38792d4918aa788b3760eee /drivers/iommu/Kconfig | |
| parent | a73e528ab1499505c29e14091b19cb041e20e038 (diff) | |
| download | lwn-48ec83bcbcf5090fcdf74a6168f161d247492979.tar.gz lwn-48ec83bcbcf5090fcdf74a6168f161d247492979.zip | |
iommu/arm-smmu: Add initial driver support for ARM SMMUv3 devices
Version three of the ARM SMMU architecture introduces significant
changes and improvements over previous versions of the specification,
necessitating a new driver in the Linux kernel.
The main change to the programming interface is that the majority of the
configuration data has been moved from MMIO registers to in-memory data
structures, with communication between the CPU and the SMMU being
mediated via in-memory circular queues.
This patch adds an initial driver for SMMUv3 to Linux. We currently
support pinned stage-1 (DMA) and stage-2 (KVM VFIO) mappings using the
generic IO-pgtable code.
Cc: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/Kconfig')
| -rw-r--r-- | drivers/iommu/Kconfig | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index 1ae4e547b419..40f37a2b4a8a 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -339,6 +339,7 @@ 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. +# ARM IOMMU support config ARM_SMMU bool "ARM Ltd. System MMU (SMMU) Support" depends on (ARM64 || ARM) && MMU @@ -352,4 +353,16 @@ config ARM_SMMU Say Y here if your SoC includes an IOMMU device implementing the ARM SMMU architecture. +config ARM_SMMU_V3 + bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support" + depends on ARM64 && PCI + select IOMMU_API + select IOMMU_IO_PGTABLE_LPAE + help + Support for implementations of the ARM System MMU architecture + version 3 providing translation support to a PCIe root complex. + + Say Y here if your system includes an IOMMU device implementing + the ARM SMMUv3 architecture. + endif # IOMMU_SUPPORT |