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linux-7.2.3/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"
+	default RISCV
+	depends on GENERIC_MSI_IRQ
+	depends on (RISCV || COMPILE_TEST) && 64BIT
+	select IOMMU_API
+	select GENERIC_PT
+	select IOMMU_PT
+	select IOMMU_PT_RISCV64
+	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.
+
+config RISCV_IOMMU_PCI
+	def_bool y if RISCV_IOMMU && PCI_MSI
+	help
+	  Support for the PCIe implementation of RISC-V IOMMU architecture.