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>

diff --git a/MAINTAINERS b/MAINTAINERS
index 474bcb6..469d03b 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -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)

diff --cc drivers/iommu/Kconfig
Simple merge

diff --cc drivers/iommu/Makefile
Simple merge

diff --cc drivers/iommu/arm-smmu-v3.c
Simple merge