Merge tag 'iommu-updates-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git...

Pull IOMMU updates from Joerg Roedel:
 "This update comes with:

   - Support for lockless operation in the ARM io-pgtable code.

     This is an important step to solve the scalability problems in the
     common dma-iommu code for ARM

   - Some Errata workarounds for ARM SMMU implemenations

   - Rewrite of the deferred IO/TLB flush code in the AMD IOMMU driver.

     The code suffered from very high flush rates, with the new
     implementation the flush rate is down to ~1% of what it was before

   - Support for amd_iommu=off when booting with kexec.

     The problem here was that the IOMMU driver bailed out early without
     disabling the iommu hardware, if it was enabled in the old kernel

   - The Rockchip IOMMU driver is now available on ARM64

   - Align the return value of the iommu_ops->device_group call-backs to
     not miss error values

   - Preempt-disable optimizations in the Intel VT-d and common IOVA
     code to help Linux-RT

   - Various other small cleanups and fixes"

* tag 'iommu-updates-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (60 commits)
  iommu/vt-d: Constify intel_dma_ops
  iommu: Warn once when device_group callback returns NULL
  iommu/omap: Return ERR_PTR in device_group call-back
  iommu: Return ERR_PTR() values from device_group call-backs
  iommu/s390: Use iommu_group_get_for_dev() in s390_iommu_add_device()
  iommu/vt-d: Don't disable preemption while accessing deferred_flush()
  iommu/iova: Don't disable preempt around this_cpu_ptr()
  iommu/arm-smmu-v3: Add workaround for Cavium ThunderX2 erratum #126
  iommu/arm-smmu-v3: Enable ACPI based HiSilicon CMD_PREFETCH quirk(erratum 161010701)
  iommu/arm-smmu-v3: Add workaround for Cavium ThunderX2 erratum #74
  ACPI/IORT: Fixup SMMUv3 resource size for Cavium ThunderX2 SMMUv3 model
  iommu/arm-smmu-v3, acpi: Add temporary Cavium SMMU-V3 IORT model number definitions
  iommu/io-pgtable-arm: Use dma_wmb() instead of wmb() when publishing table
  iommu/io-pgtable: depend on !GENERIC_ATOMIC64 when using COMPILE_TEST with LPAE
  iommu/arm-smmu-v3: Remove io-pgtable spinlock
  iommu/arm-smmu: Remove io-pgtable spinlock
  iommu/io-pgtable-arm-v7s: Support lockless operation
  iommu/io-pgtable-arm: Support lockless operation
  iommu/io-pgtable: Introduce explicit coherency
  iommu/io-pgtable-arm-v7s: Refactor split_blk_unmap
  ...

diff --cc Documentation/arm64/silicon-errata.txt
index f5f93dc,8564795..66e8ce1
--- 1/Documentation/arm64/silicon-errata.txt
--- 2/Documentation/arm64/silicon-errata.txt
+++ b/Documentation/arm64/silicon-errata.txt
@@@ -61,8 -61,9 +61,10 @@@ stable kernels
  | Cavium         | ThunderX ITS    | #23144          | CAVIUM_ERRATUM_23144        |
  | Cavium         | ThunderX GICv3  | #23154          | CAVIUM_ERRATUM_23154        |
  | Cavium         | ThunderX Core   | #27456          | CAVIUM_ERRATUM_27456        |
- | Cavium         | ThunderX SMMUv2 | #27704          | N/A                         |
 +| Cavium         | ThunderX Core   | #30115          | CAVIUM_ERRATUM_30115        |
+ | Cavium         | ThunderX SMMUv2 | #27704          | N/A                         |
+ | Cavium         | ThunderX2 SMMUv3| #74             | N/A                         |
+ | Cavium         | ThunderX2 SMMUv3| #126            | N/A                         |
  |                |                 |                 |                             |
  | Freescale/NXP  | LS2080A/LS1043A | A-008585        | FSL_ERRATUM_A008585         |
  |                |                 |                 |                             |

diff --cc drivers/acpi/arm64/iort.c
Simple merge

diff --cc drivers/iommu/amd_iommu.c
Simple merge

diff --cc drivers/iommu/dma-iommu.c
Simple merge

diff --cc drivers/iommu/intel-iommu.c
Simple merge

diff --cc drivers/iommu/intel_irq_remapping.c
Simple merge