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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>
This commit is contained in:
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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@ -1634,11 +1634,12 @@ F: drivers/i2c/busses/i2c-cadence.c
F: drivers/mmc/host/sdhci-of-arasan.c
F: drivers/edac/synopsys_edac.c
ARM SMMU DRIVER
ARM SMMU DRIVERS
M: Will Deacon <will.deacon@arm.com>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Maintained
F: drivers/iommu/arm-smmu.c
F: drivers/iommu/arm-smmu-v3.c
F: drivers/iommu/io-pgtable-arm.c
ARM64 PORT (AARCH64 ARCHITECTURE)

13
drivers/iommu/Kconfig
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@ -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

1
drivers/iommu/Makefile
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@ -9,6 +9,7 @@ obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o msm_iommu_dev.o
obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o amd_iommu_init.o
obj-$(CONFIG_AMD_IOMMU_V2) += amd_iommu_v2.o
obj-$(CONFIG_ARM_SMMU) += arm-smmu.o
obj-$(CONFIG_ARM_SMMU_V3) += arm-smmu-v3.o
obj-$(CONFIG_DMAR_TABLE) += dmar.o
obj-$(CONFIG_INTEL_IOMMU) += intel-iommu.o
obj-$(CONFIG_IPMMU_VMSA) += ipmmu-vmsa.o

2670
drivers/iommu/arm-smmu-v3.c Normal file
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