[PATCH v12 00/10] iommu: I/O page faults for SMMUv3

[Jean-Philippe Brucker]

Add stall support to the SMMUv3, along with a common I/O Page Fault
handler.

Since v11 I added a sanity check in arm_smmu_dev_disable_feature(),
patch 10: return -EBUSY if device drivers attempt to disable the IOPF
feature before SVA. That would leak the IOPF param and fault handler.

v11: https://lore.kernel.org/linux-iommu/20210125110650.3232195-1-jean-philippe@linaro.org/
v10: https://lore.kernel.org/linux-iommu/20210121123623.2060416-1-jean-philippe@linaro.org/
v9: https://lore.kernel.org/linux-iommu/20210108145217.2254447-1-jean-philippe@linaro.org/

Jean-Philippe Brucker (10):
  iommu: Fix comment for struct iommu_fwspec
  iommu/arm-smmu-v3: Use device properties for pasid-num-bits
  iommu: Separate IOMMU_DEV_FEAT_IOPF from IOMMU_DEV_FEAT_SVA
  iommu/vt-d: Support IOMMU_DEV_FEAT_IOPF
  uacce: Enable IOMMU_DEV_FEAT_IOPF
  iommu: Add a page fault handler
  iommu/arm-smmu-v3: Maintain a SID->device structure
  dt-bindings: document stall property for IOMMU masters
  ACPI/IORT: Enable stall support for platform devices
  iommu/arm-smmu-v3: Add stall support for platform devices

 drivers/iommu/Makefile                        |   1 +
 .../devicetree/bindings/iommu/iommu.txt       |  18 +
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h   |  56 ++-
 drivers/iommu/iommu-sva-lib.h                 |  53 ++
 include/linux/iommu.h                         |  26 +-
 drivers/acpi/arm64/iort.c                     |  15 +-
 .../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c   |  59 ++-
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c   | 351 +++++++++++--
 drivers/iommu/intel/iommu.c                   |  11 +-
 drivers/iommu/io-pgfault.c                    | 461 ++++++++++++++++++
 drivers/iommu/of_iommu.c                      |   5 -
 drivers/misc/uacce/uacce.c                    |  39 +-
 12 files changed, 1021 insertions(+), 74 deletions(-)
 create mode 100644 drivers/iommu/io-pgfault.c

-- 
2.30.0