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