drivers/iommu/generic_pt/Kconfig

Source file repositories/reference/linux-study-clean/drivers/iommu/generic_pt/Kconfig

File Facts

System
Linux kernel
Corpus path
drivers/iommu/generic_pt/Kconfig
Extension
[no extension]
Size
3121 bytes
Lines
91
Domain
Driver Families
Bucket
drivers/iommu
Inferred role
Driver Families: build/configuration rule
Status
atlas-only

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

# SPDX-License-Identifier: GPL-2.0-only

menuconfig GENERIC_PT
	bool "Generic Radix Page Table" if COMPILE_TEST
	help
	  Generic library for building radix tree page tables.

	  Generic PT provides a set of HW page table formats and a common
	  set of APIs to work with them.

if GENERIC_PT
config DEBUG_GENERIC_PT
	bool "Extra debugging checks for GENERIC_PT"
	help
	  Enable extra run time debugging checks for GENERIC_PT code. This
	  incurs a runtime cost and should not be enabled for production
	  kernels.

	  The kunit tests require this to be enabled to get full coverage.

config IOMMU_PT
	tristate "IOMMU Page Tables"
	select IOMMU_API
	depends on IOMMU_SUPPORT
	depends on GENERIC_PT
	help
	  Generic library for building IOMMU page tables

	  IOMMU_PT provides an implementation of the page table operations
	  related to struct iommu_domain using GENERIC_PT. It provides a single
	  implementation of the page table operations that can be shared by
	  multiple drivers.

if IOMMU_PT
config IOMMU_PT_AMDV1
	tristate "IOMMU page table for 64-bit AMD IOMMU v1"
	depends on !GENERIC_ATOMIC64 # for cmpxchg64
	help
	  iommu_domain implementation for the AMD v1 page table. AMDv1 is the
	  "host" page table. It supports granular page sizes of almost every
	  power of 2 and decodes the full 64-bit IOVA space.

	  Selected automatically by an IOMMU driver that uses this format.

config IOMMU_PT_VTDSS
       tristate "IOMMU page table for Intel VT-d Second Stage"
	depends on !GENERIC_ATOMIC64 # for cmpxchg64
	help
	  iommu_domain implementation for the Intel VT-d's 64 bit 3/4/5
	  level Second Stage page table. It is similar to the X86_64 format with
	  4K/2M/1G page sizes.

	  Selected automatically by an IOMMU driver that uses this format.

config IOMMU_PT_RISCV64
       tristate "IOMMU page table for RISC-V 64 bit Sv57/Sv48/Sv39"
	depends on !GENERIC_ATOMIC64 # for cmpxchg64
	help
	  iommu_domain implementation for RISC-V 64 bit 3/4/5 level page table.
	  It supports 4K/2M/1G/512G/256T page sizes and can decode a sign
	  extended portion of the 64 bit IOVA space.

	  Selected automatically by an IOMMU driver that uses this format.

config IOMMU_PT_X86_64
	tristate "IOMMU page table for x86 64-bit, 4/5 levels"
	depends on !GENERIC_ATOMIC64 # for cmpxchg64
	help
	  iommu_domain implementation for the x86 64-bit 4/5 level page table.
	  It supports 4K/2M/1G page sizes and can decode a sign-extended

Annotation

Implementation Notes