diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2025-11-04 14:30:08 -0400 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2025-11-05 09:07:13 +0100 |
| commit | e5359dcc617a2174d834bab4083340196615d8bd (patch) | |
| tree | 82a45fc71cd65323634e630e283ff3d3d323ed2e /include | |
| parent | 1dd4187f53c35165262691795109879e37ddca62 (diff) | |
iommupt: Add a mock pagetable format for iommufd selftest to use
The iommufd self test uses an xarray to store the pfns and their orders to
emulate a page table. Slightly modify the amdv1 page table to create a
real page table that has similar properties:
- 2k base granule to simulate something like a 4k page table on a 64K
PAGE_SIZE ARM system
- Contiguous page support for every PFN order
- Dirty tracking
AMDv1 is the closest format, as it is the only one that already supports
every page size. Tweak it to have only 5 levels and an 11 bit base granule
and compile it separately as a format variant.
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Samiullah Khawaja <skhawaja@google.com>
Tested-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>
Tested-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/generic_pt/iommu.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/generic_pt/iommu.h b/include/linux/generic_pt/iommu.h index 03a906fbe12a..848a5fb76272 100644 --- a/include/linux/generic_pt/iommu.h +++ b/include/linux/generic_pt/iommu.h @@ -237,6 +237,12 @@ struct pt_iommu_amdv1_hw_info { IOMMU_FORMAT(amdv1, amdpt); +/* amdv1_mock is used by the iommufd selftest */ +#define pt_iommu_amdv1_mock pt_iommu_amdv1 +#define pt_iommu_amdv1_mock_cfg pt_iommu_amdv1_cfg +struct pt_iommu_amdv1_mock_hw_info; +IOMMU_PROTOTYPES(amdv1_mock); + #undef IOMMU_PROTOTYPES #undef IOMMU_FORMAT #endif |