iommu/arm-smmu: Add initial driver support for ARM SMMUv3 devices

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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>

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Will Deacon 2015-05-27 17:25:59 +01:00 • committed by Joerg Roedel

parent a73e528ab1

commit 48ec83bcbc

4 changed files with 2686 additions and 1 deletions

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3

MAINTAINERS

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13

drivers/iommu/Kconfig

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drivers/iommu/Makefile

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2670

drivers/iommu/arm-smmu-v3.c

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