Re: [PATCH v2 0/6] Add support for ACPI VIOT

["Michael S. Tsirkin" <mst@redhat.com>]

On Fri, Apr 23, 2021 at 01:38:31PM +0200, Jean-Philippe Brucker wrote:
> Add a driver for the ACPI VIOT table, which provides topology
> information for para-virtual platforms. Enable virtio-iommu on
> non-devicetree platforms, including x86.

Acked-by: Michael S. Tsirkin <mst@redhat.com>

Mostly ACPI stuff so I assume it's best to merge through that tree.

> Since v1 [1]:
> * The VIOT header definitions have been picked for v5.13
> * Share more code with IORT. Patches 1 and 2 extract the common code
>   from IORT.
> * Simplify the VIOT driver. Use the existing fwnode infrastructure
>   instead of adding hooks to the IOMMU driver.
> 
> You can find a QEMU implementation at [2], with extra support for
> testing all VIOT nodes including MMIO-based endpoints and IOMMU. This
> series, based on linux-next, is at [3]
> 
> [1] https://lore.kernel.org/linux-iommu/20210316191652.3401335-1-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          |  60 +++++-
>  drivers/acpi/viot.c          | 350 +++++++++++++++++++++++++++++++++++
>  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, 548 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