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[0/4] RISC-V: Add ACPI support for IOMMU

Message ID 20250514055723.1328557-1-sunilvl@ventanamicro.com
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Series RISC-V: Add ACPI support for IOMMU | expand

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Sunil V L May 14, 2025, 5:57 a.m. UTC 
This series adds support for RISC-V IOMMU on ACPI based platforms.
RISC-V IO Mapping Table (RIMT) is a new static ACPI table [1] introduced
to communicate IOMMU information to the OS.

The first patch in the series is a ACPICA patch which is already
available in linux-next but included in this series for completeness
only.

[1] - https://github.com/riscv-non-isa/riscv-acpi-rimt/releases/download/v1.0/rimt-spec.pdf

Sunil V L (4):
  ACPICA: actbl2: Add definitions for RIMT
  ACPI: RISC-V: Add support for RIMT
  ACPI: scan: Add support for RISC-V in acpi_iommu_configure_id()
  iommu/riscv: Add ACPI support

 MAINTAINERS                          |   1 +
 arch/riscv/Kconfig                   |   1 +
 drivers/acpi/Kconfig                 |   4 +
 drivers/acpi/riscv/Kconfig           |   8 +
 drivers/acpi/riscv/Makefile          |   1 +
 drivers/acpi/riscv/init.c            |   2 +
 drivers/acpi/riscv/init.h            |   1 +
 drivers/acpi/riscv/rimt.c            | 537 +++++++++++++++++++++++++++
 drivers/acpi/scan.c                  |   9 +-
 drivers/iommu/riscv/iommu-platform.c |  17 +-
 drivers/iommu/riscv/iommu.c          |  10 +
 include/acpi/actbl2.h                |  83 +++++
 include/linux/acpi_rimt.h            |  21 ++
 13 files changed, 692 insertions(+), 3 deletions(-)
 create mode 100644 drivers/acpi/riscv/Kconfig
 create mode 100644 drivers/acpi/riscv/rimt.c
 create mode 100644 include/linux/acpi_rimt.h