linux - linux

	Commit message (Collapse)	Author	Age	Files	Lines
*	iommu/arm-smmu: Delete an unnecessary check before the function call ↵	Markus Elfring	2015-06-29	1	-2/+1
\| \| \| \| \| \| \| \| \| \| \| \| \|	"free_io_pgtable_ops" The free_io_pgtable_ops() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
*	iommu/arm-smmu: Add initial driver support for ARM SMMUv3 devices	Will Deacon	2015-05-29	1	-0/+2670
	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>