| # 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_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 |
| portion of the 64-bit IOVA space. |
| |
| Selected automatically by an IOMMU driver that uses this format. |
| |
| config IOMMU_PT_KUNIT_TEST |
| tristate "IOMMU Page Table KUnit Test" if !KUNIT_ALL_TESTS |
| depends on KUNIT |
| depends on IOMMU_PT_AMDV1 || !IOMMU_PT_AMDV1 |
| depends on IOMMU_PT_X86_64 || !IOMMU_PT_X86_64 |
| depends on IOMMU_PT_VTDSS || !IOMMU_PT_VTDSS |
| default KUNIT_ALL_TESTS |
| help |
| Enable kunit tests for GENERIC_PT and IOMMU_PT that covers all the |
| enabled page table formats. The test covers most of the GENERIC_PT |
| functions provided by the page table format, as well as covering the |
| iommu_domain related functions. |
| |
| endif |
| endif |
