[PATCH v5 0/3] RISC-V: Add ACPI support for IOMMU

From: Sunil V L <sunilvl@ventanamicro.com>
To: linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
	linux-acpi@vger.kernel.org, iommu@lists.linux.dev
Cc: Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Alexandre Ghiti <alex@ghiti.fr>,
	"Rafael J . Wysocki" <rafael@kernel.org>,
	Len Brown <lenb@kernel.org>,
	Tomasz Jeznach <tjeznach@rivosinc.com>,
	Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
	Robin Murphy <robin.murphy@arm.com>,
	Atish Kumar Patra <atishp@rivosinc.com>,
	Anup Patel <apatel@ventanamicro.com>,
	Andrew Jones <ajones@ventanamicro.com>,
	Sunil V L <sunilvl@ventanamicro.com>
Subject: [PATCH v5 0/3] RISC-V: Add ACPI support for IOMMU
Date: Wed, 16 Jul 2025 16:10:56 +0530	[thread overview]
Message-ID: <20250716104059.3539482-1-sunilvl@ventanamicro.com> (raw)

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.

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

Changes since v4:
	1) Rebased to 6.16-rc6
	2) Addressed Anup's feedback on formatting.
	3) Added RB tag from Will and Anup.

Changes since v3:
	1) Rebased to 6.16-rc5
	2) Addressed Drew's feedback on v3.
		a) Reordered calling rimt_iommu_configure_id().
		b) Removed unnecessary inline.
		c) Added pr_fmt.
		d) Removed redundant rimt_iommu_configure_id() stub.
	3) Added Drew's RB tag in PATCH 3.

Changes since v2:
	1) Rebased to 6.16-rc4
	2) Removed Anup's SOB and link tags added by mistake in v2.

Changes since v1:
	1) Rebased to v6.16-rc1.
	2) Dropped ACPICA patch since it is already available in 6.16-rc1.
	3) Added Rafael's ACK.
	4) Fixed few issues found by bots.

Sunil V L (3):
  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           |   7 +
 drivers/acpi/riscv/Makefile          |   1 +
 drivers/acpi/riscv/init.c            |   2 +
 drivers/acpi/riscv/init.h            |   1 +
 drivers/acpi/riscv/rimt.c            | 520 +++++++++++++++++++++++++++
 drivers/acpi/scan.c                  |   4 +
 drivers/iommu/riscv/iommu-platform.c |  17 +-
 drivers/iommu/riscv/iommu.c          |  10 +
 include/linux/acpi_rimt.h            |  28 ++
 12 files changed, 595 insertions(+), 1 deletion(-)
 create mode 100644 drivers/acpi/riscv/Kconfig
 create mode 100644 drivers/acpi/riscv/rimt.c
 create mode 100644 include/linux/acpi_rimt.h

-- 
2.43.0