[PATCH v8 0/9] iommu: I/O page faults for SMMUv3 - Jean-Philippe Brucker

From: Jean-Philippe Brucker <jean-philippe@linaro.org>
To: joro@8bytes.org, will@kernel.org, lorenzo.pieralisi@arm.com,
	robh+dt@kernel.org
Cc: devicetree@vger.kernel.org, linux-acpi@vger.kernel.org,
	linux-pci@vger.kernel.org, guohanjun@huawei.com,
	rjw@rjwysocki.net, shameerali.kolothum.thodi@huawei.com,
	eric.auger@redhat.com, iommu@lists.linux-foundation.org,
	Jonathan.Cameron@huawei.com, sudeep.holla@arm.com,
	bhelgaas@google.com, zhangfei.gao@linaro.org,
	vivek.gautam@arm.com, baolu.lu@linux.intel.com,
	robin.murphy@arm.com,
	Jean-Philippe Brucker <jean-philippe@linaro.org>,
	linux-arm-kernel@lists.infradead.org, lenb@kernel.org
Subject: [PATCH v8 0/9] iommu: I/O page faults for SMMUv3
Date: Thu, 12 Nov 2020 13:55:12 +0100	[thread overview]
Message-ID: <20201112125519.3987595-1-jean-philippe@linaro.org> (raw)

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

These patches were last sent as part of v7 of the larger SVA series [1].
Main changes since v7:
* Dropped CONFIG_IOMMU_PAGE_FAULT, reuse CONFIG_IOMMU_SVA_LIB instead.
* Extracted devicetree support into patch 4.
* Added patch 5 for ACPI support.
* Dropped event queue flush on unbind(). Since device drivers must
  complete DMA transactions before calling unbind(), there cannot be any
  pending stalled event.
* A few small fixes.

The series depends on "iommu/sva: Add PASID helpers" [2], since it
provides the function to search an mm_struct by PASID.

Has anyone been testing the PRI patches on hardware? I still only have a
software model to test them, so as much as I'd like to cross this off my
list, we could leave out patches 7-9 for now.

[1] https://lore.kernel.org/linux-iommu/20200519175502.2504091-1-jean-philippe@linaro.org/
[2] https://lore.kernel.org/linux-iommu/20201106155048.997886-1-jean-philippe@linaro.org/

Jean-Philippe Brucker (9):
  iommu: Add a page fault handler
  iommu/arm-smmu-v3: Maintain a SID->device structure
  dt-bindings: document stall property for IOMMU masters
  of/iommu: Support dma-can-stall property
  ACPI/IORT: Enable stall support for platform devices
  iommu/arm-smmu-v3: Add stall support for platform devices
  PCI/ATS: Add PRI stubs
  PCI/ATS: Export PRI functions
  iommu/arm-smmu-v3: Add support for PRI

 drivers/iommu/Makefile                        |   1 +
 .../devicetree/bindings/iommu/iommu.txt       |  18 +
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h   |  69 +-
 drivers/iommu/iommu-sva-lib.h                 |  53 ++
 include/linux/iommu.h                         |   4 +
 include/linux/pci-ats.h                       |   7 +
 drivers/acpi/arm64/iort.c                     |   1 +
 .../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c   |  52 +-
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c   | 605 +++++++++++++++---
 drivers/iommu/io-pgfault.c                    | 462 +++++++++++++
 drivers/iommu/of_iommu.c                      |   5 +-
 drivers/pci/ats.c                             |   4 +
 12 files changed, 1191 insertions(+), 90 deletions(-)
 create mode 100644 drivers/iommu/io-pgfault.c

-- 
2.29.1

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