Commit 5c0ebbd3 authored by Tomasz Jeznach's avatar Tomasz Jeznach Committed by Joerg Roedel
Browse files

iommu/riscv: Add RISC-V IOMMU platform device driver 

Introduce platform device driver for implementation of RISC-V IOMMU
architected hardware.

Hardware interface definition located in file iommu-bits.h is based on
ratified RISC-V IOMMU Architecture Specification version 1.0.0.

This patch implements platform device initialization, early check and
configuration of the IOMMU interfaces and enables global pass-through
address translation mode (iommu_mode == BARE), without registering
hardware instance in the IOMMU subsystem.

Link: https://github.com/riscv-non-isa/riscv-iommu


Co-developed-by: default avatarNick Kossifidis <mick@ics.forth.gr>
Signed-off-by: default avatarNick Kossifidis <mick@ics.forth.gr>
Co-developed-by: default avatarSebastien Boeuf <seb@rivosinc.com>
Signed-off-by: default avatarSebastien Boeuf <seb@rivosinc.com>
Reviewed-by: default avatarLu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: default avatarTomasz Jeznach <tjeznach@rivosinc.com>
Acked-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
Link: https://lore.kernel.org/r/2f2e4530c0ee4a81385efa90f1da932f5179f3fb.1729059707.git.tjeznach@rivosinc.com


Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 14d050cd

MAINTAINERS

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@@ -19895,7 +19895,9 @@ M: Tomasz Jeznach <tjeznach@rivosinc.com> 
L:	iommu@lists.linux.dev

L:	linux-riscv@lists.infradead.org

S:	Maintained

T:	git git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux.git

F:	Documentation/devicetree/bindings/iommu/riscv,iommu.yaml

F:	drivers/iommu/riscv/









RISC-V MICROCHIP FPGA SUPPORT









M:	Conor Dooley <conor.dooley@microchip.com>

























drivers/iommu/Kconfig



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@@ -195,6 +195,7 @@ config MSM_IOMMU







source "drivers/iommu/amd/Kconfig"









source "drivers/iommu/intel/Kconfig"









source "drivers/iommu/iommufd/Kconfig"









source "drivers/iommu/riscv/Kconfig"



















config IRQ_REMAP









	bool "Support for Interrupt Remapping"
































drivers/iommu/Makefile



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# SPDX-License-Identifier: GPL-2.0









obj-y += amd/ intel/ arm/ iommufd/









obj-y += amd/ intel/ arm/ iommufd/ riscv/









obj-$(CONFIG_IOMMU_API) += iommu.o









obj-$(CONFIG_IOMMU_API) += iommu-traces.o









obj-$(CONFIG_IOMMU_API) += iommu-sysfs.o
































drivers/iommu/riscv/Kconfig
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# SPDX-License-Identifier: GPL-2.0-only









# RISC-V IOMMU support



















config RISCV_IOMMU









	bool "RISC-V IOMMU Support"









	depends on RISCV && 64BIT









	default y









	select IOMMU_API









	help









	  Support for implementations of the RISC-V IOMMU architecture that









	  complements the RISC-V MMU capabilities, providing similar address









	  translation and protection functions for accesses from I/O devices.



















	  Say Y here if your SoC includes an IOMMU device implementing









	  the RISC-V IOMMU architecture.
























drivers/iommu/riscv/Makefile
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# SPDX-License-Identifier: GPL-2.0-only









obj-$(CONFIG_RISCV_IOMMU) += iommu.o iommu-platform.o