1# SPDX-License-Identifier: GPL-2.0-only 2 3menuconfig GENERIC_PT 4 bool "Generic Radix Page Table" if COMPILE_TEST 5 help 6 Generic library for building radix tree page tables. 7 8 Generic PT provides a set of HW page table formats and a common 9 set of APIs to work with them. 10 11if GENERIC_PT 12config DEBUG_GENERIC_PT 13 bool "Extra debugging checks for GENERIC_PT" 14 help 15 Enable extra run time debugging checks for GENERIC_PT code. This 16 incurs a runtime cost and should not be enabled for production 17 kernels. 18 19 The kunit tests require this to be enabled to get full coverage. 20 21config IOMMU_PT 22 tristate "IOMMU Page Tables" 23 select IOMMU_API 24 depends on IOMMU_SUPPORT 25 depends on GENERIC_PT 26 help 27 Generic library for building IOMMU page tables 28 29 IOMMU_PT provides an implementation of the page table operations 30 related to struct iommu_domain using GENERIC_PT. It provides a single 31 implementation of the page table operations that can be shared by 32 multiple drivers. 33 34if IOMMU_PT 35config IOMMU_PT_AMDV1 36 tristate "IOMMU page table for 64-bit AMD IOMMU v1" 37 depends on !GENERIC_ATOMIC64 # for cmpxchg64 38 help 39 iommu_domain implementation for the AMD v1 page table. AMDv1 is the 40 "host" page table. It supports granular page sizes of almost every 41 power of 2 and decodes the full 64-bit IOVA space. 42 43 Selected automatically by an IOMMU driver that uses this format. 44 45config IOMMU_PT_VTDSS 46 tristate "IOMMU page table for Intel VT-d Second Stage" 47 depends on !GENERIC_ATOMIC64 # for cmpxchg64 48 help 49 iommu_domain implementation for the Intel VT-d's 64 bit 3/4/5 50 level Second Stage page table. It is similar to the X86_64 format with 51 4K/2M/1G page sizes. 52 53 Selected automatically by an IOMMU driver that uses this format. 54 55config IOMMU_PT_X86_64 56 tristate "IOMMU page table for x86 64-bit, 4/5 levels" 57 depends on !GENERIC_ATOMIC64 # for cmpxchg64 58 help 59 iommu_domain implementation for the x86 64-bit 4/5 level page table. 60 It supports 4K/2M/1G page sizes and can decode a sign-extended 61 portion of the 64-bit IOVA space. 62 63 Selected automatically by an IOMMU driver that uses this format. 64 65config IOMMU_PT_KUNIT_TEST 66 tristate "IOMMU Page Table KUnit Test" if !KUNIT_ALL_TESTS 67 depends on KUNIT 68 depends on IOMMU_PT_AMDV1 || !IOMMU_PT_AMDV1 69 depends on IOMMU_PT_X86_64 || !IOMMU_PT_X86_64 70 depends on IOMMU_PT_VTDSS || !IOMMU_PT_VTDSS 71 default KUNIT_ALL_TESTS 72 help 73 Enable kunit tests for GENERIC_PT and IOMMU_PT that covers all the 74 enabled page table formats. The test covers most of the GENERIC_PT 75 functions provided by the page table format, as well as covering the 76 iommu_domain related functions. 77 78endif 79endif 80