Merge tag 'iommu-updates-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU updates from Joerg Roedel:
 "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)"

* tag 'iommu-updates-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (42 commits)
  iommu: Decouple iommu_map_sg from CPU page size
  iommu/vt-d: Fix an off-by-one bug in __domain_mapping()
  pci, ACPI, iommu: Enhance pci_root to support DMAR device hotplug
  iommu/vt-d: Enhance intel-iommu driver to support DMAR unit hotplug
  iommu/vt-d: Enhance error recovery in function intel_enable_irq_remapping()
  iommu/vt-d: Enhance intel_irq_remapping driver to support DMAR unit hotplug
  iommu/vt-d: Search for ACPI _DSM method for DMAR hotplug
  iommu/vt-d: Implement DMAR unit hotplug framework
  iommu/vt-d: Dynamically allocate and free seq_id for DMAR units
  iommu/vt-d: Introduce helper function dmar_walk_resources()
  iommu/arm-smmu: add support for DOMAIN_ATTR_NESTING attribute
  iommu/arm-smmu: Play nice on non-ARM/SMMU systems
  iommu/amd: remove compiler warning due to IOMMU_CAP_NOEXEC
  iommu/arm-smmu: add IOMMU_CAP_NOEXEC to the ARM SMMU driver
  iommu: add capability IOMMU_CAP_NOEXEC
  iommu/arm-smmu: change IOMMU_EXEC to IOMMU_NOEXEC
  iommu/amd: Fix accounting of device_state
  x86/vt-d: Fix incorrect bit operations in setting values
  iommu/rockchip: Allow to compile with COMPILE_TEST
  iommu/ipmmu-vmsa: Return proper error if devm_request_irq fails
  ...

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