Add a driver for the ACPI VIOT table, which provides topology
information for para-virtual IOMMUs. Enable virtio-iommu on
non-devicetree platforms, including x86.

Since v4 [1]:
* Fixes (comments, wrong argument, unused variable)
* Removed patch 5 that wrongly moved set_dma_ops(dev, NULL) into dma-iommu.
  The simplification of limit parameters for x86 callers is now in patch 4.
* Release ACPI table after parsing
* Added review and tested tags, thanks for all the feedback!

You can find a QEMU implementation at [2], with extra support for
testing all VIOT nodes including MMIO-based endpoints and IOMMU.
This series is at [3].

[1] https://lore.kernel.org/linux-iommu/20210610075130.67517-1-jean-philippe@linaro.org/ (local)
[2] https://jpbrucker.net/git/qemu/log/?h=virtio-iommu/acpi
[3] https://jpbrucker.net/git/linux/log/?h=virtio-iommu/acpi

Jean-Philippe Brucker (5):
  ACPI: arm64: Move DMA setup operations out of IORT
  ACPI: Move IOMMU setup code out of IORT
  ACPI: Add driver for the VIOT table
  iommu/dma: Pass address limit rather than size to
    iommu_setup_dma_ops()
  iommu/virtio: Enable x86 support

 drivers/acpi/Kconfig         |   3 +
 drivers/iommu/Kconfig        |   4 +-
 drivers/acpi/Makefile        |   2 +
 drivers/acpi/arm64/Makefile  |   1 +
 include/acpi/acpi_bus.h      |   3 +
 include/linux/acpi.h         |   3 +
 include/linux/acpi_iort.h    |  14 +-
 include/linux/acpi_viot.h    |  19 ++
 include/linux/dma-iommu.h    |   4 +-
 arch/arm64/mm/dma-mapping.c  |   2 +-
 drivers/acpi/arm64/dma.c     |  50 +++++
 drivers/acpi/arm64/iort.c    | 128 ++----------
 drivers/acpi/bus.c           |   2 +
 drivers/acpi/scan.c          |  78 +++++++-
 drivers/acpi/viot.c          | 366 +++++++++++++++++++++++++++++++++++
 drivers/iommu/amd/iommu.c    |   2 +-
 drivers/iommu/dma-iommu.c    |  13 +-
 drivers/iommu/intel/iommu.c  |   5 +-
 drivers/iommu/virtio-iommu.c |  11 ++
 MAINTAINERS                  |   8 +
 20 files changed, 581 insertions(+), 137 deletions(-)
 create mode 100644 include/linux/acpi_viot.h
 create mode 100644 drivers/acpi/arm64/dma.c
 create mode 100644 drivers/acpi/viot.c

-- 
2.32.0


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