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Wysocki" , Len Brown , Tomasz Jeznach , Joerg Roedel , Will Deacon , Robin Murphy , Sunil V L Subject: [PATCH v6 0/3] RISC-V: Add ACPI support for IOMMU Date: Mon, 18 Aug 2025 10:28:04 +0530 Message-ID: <20250818045807.763922-1-sunilvl@ventanamicro.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 v5: 1) Rebased to 6.17-rc2 2) Fixed incorrect id_out assignment (Reported by Xianliang) 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