Add stall support to the SMMUv3, along with a common I/O Page Fault handler. Changes since v9 [1]: * Style changes suggested by Jonathan * Fixes to patch 10 pointed out by Robin * In patch 10, don't register the mm fault handler when enabling IOMMU_DEV_FEAT_IOPF, because that feature only indicates that a device driver wants to use PRI or stall. After enabling it, drivers may register their own IOPF handler (see discussion on v9 patch 03). Instead register the mm handler when enabling IOMMU_DEV_FEAT_SVA. [1] 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 | 347 +++++++++++-- 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, 1018 insertions(+), 73 deletions(-) create mode 100644 drivers/iommu/io-pgfault.c -- 2.30.0
