Re: [PATCH v4 0/6] Add support for ACPI VIOT

[Jean-Philippe Brucker <jean-philippe@linaro.org>]

Hi Rafael,

On Thu, Jun 10, 2021 at 09:51:27AM +0200, Jean-Philippe Brucker wrote:
> 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 v3 [1] I fixed a build bug for !CONFIG_IOMMU_API. Joerg offered to
> take this series through the IOMMU tree, which requires Acks for patches
> 1-3.

I was wondering if you could take a look at patches 1-3, otherwise we'll
miss the mark for 5.14 since I won't be able to resend next week. The
series adds support for virtio-iommu on QEMU and cloud hypervisor.

Thanks,
Jean

> 
> 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/20210602154444.1077006-1-jean-philippe@linaro.org/
> [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 (6):
>   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/dma: Simplify calls 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    | 129 ++-----------
>  drivers/acpi/bus.c           |   2 +
>  drivers/acpi/scan.c          |  78 +++++++-
>  drivers/acpi/viot.c          | 364 +++++++++++++++++++++++++++++++++++
>  drivers/iommu/amd/iommu.c    |   9 +-
>  drivers/iommu/dma-iommu.c    |  17 +-
>  drivers/iommu/intel/iommu.c  |  10 +-
>  drivers/iommu/virtio-iommu.c |   8 +
>  MAINTAINERS                  |   8 +
>  20 files changed, 580 insertions(+), 150 deletions(-)
>  create mode 100644 include/linux/acpi_viot.h
>  create mode 100644 drivers/acpi/arm64/dma.c
>  create mode 100644 drivers/acpi/viot.c
> 
> -- 
> 2.31.1
>