[PATCH v5 0/5] Add support for ACPI VIOT
Jean-Philippe Brucker
jean-philippe at linaro.org
Fri Jun 18 08:20:55 PDT 2021
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/
[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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