IOMMU Updates for Linux v3.19 This time with: * A new IOMMU-API call: iommu_map_sg() to map multiple non-contiguous pages into an IO address space with only one API call. This allows certain optimizations in the IOMMU driver. * DMAR device hotplug in the Intel VT-d driver. It is now possible to hotplug the IOMMU itself. * A new IOMMU driver for the Rockchip ARM platform. * Couple of cleanups and improvements in the OMAP IOMMU driver. * Nesting support for the ARM-SMMU driver. * Various other small cleanups and improvements. Please note that this time some branches were also pulled into other trees, like the DRI and the Tegra tree. The VT-d branch was also pulled into tip/x86/apic. Some patches for the AMD IOMMUv2 driver are not in the IOMMU tree but were merged by Andrew (or finally ended up in the DRI tree).