kernel/linux.git/drivers/acpi/riscv/init.h, branch linux-7.0.yLinux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=linux-7.0.y2025-09-05T13:06:03+00:00ACPI: RISC-V: Add support for RIMT2025-09-05T13:06:03+00:00Sunil V Lsunilvl@ventanamicro.com2025-08-18T04:58:05+00:00urn:sha1:8f77295525825086cb43675cd1a4f3716b119d7f
RISC-V IO Mapping Table (RIMT) is a static ACPI table to communicate
IOMMU information to the OS. The spec is available at [1].
The changes at high level are,
a) Initialize data structures required for IOMMU/device
configuration using the data from RIMT. Provide APIs required
for device configuration.
b) Provide an API for IOMMU drivers to register the
fwnode with RIMT data structures. This API will create a
fwnode for PCIe IOMMU.
[1] - https://github.com/riscv-non-isa/riscv-acpi-rimt
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20250818045807.763922-2-sunilvl@ventanamicro.com
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
ACPI: RISC-V: Initialize GSI mapping structures2024-08-27T13:48:35+00:00Sunil V Lsunilvl@ventanamicro.com2024-08-12T00:59:23+00:00urn:sha1:e77b8dc02a1ca227e84c61e6af085d350e3b3611
RISC-V has PLIC and APLIC in MADT as well as namespace devices.
Initialize the list of those structures using MADT and namespace devices
to create mapping between the ACPI handle and the GSI ranges. This will
be used later to add dependencies.
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://patch.msgid.link/20240812005929.113499-12-sunilvl@ventanamicro.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>