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iommu_pt: add kunit config for 32-bit VA (amdv1_cfg_1)

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Add test coverage for small VAs (32‑bit) starting at level 2 by enabling
the AMDv1 KUnit configuration. This limits level expansion because the
starting level can accommodate only the maximum virtual address requested.

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Ankit Soni <Ankit.Soni@amd.com>
Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Ankit Soni 2026-04-13 14:45:20 +00:00 committed by Joerg Roedel
parent 5240dab55b
commit d9f759704b
2 changed files with 4 additions and 2 deletions
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1
drivers/iommu/generic_pt/fmt/amdv1.h
View File

@ -404,6 +404,7 @@ amdv1pt_iommu_fmt_hw_info(struct pt_iommu_amdv1 *table,
static const struct pt_iommu_amdv1_cfg amdv1_kunit_fmt_cfgs[] = {
/* Matches what io_pgtable does */
[0] = { .starting_level = 2 },
[1] = { .starting_level = 2, .common.hw_max_vasz_lg2 = 32 },
};
#define kunit_fmt_cfgs amdv1_kunit_fmt_cfgs
enum { KUNIT_FMT_FEATURES = 0 };

5
drivers/iommu/generic_pt/kunit_iommu_pt.h
View File

@ -112,8 +112,9 @@ static void test_increase_level(struct kunit *test)
if (IS_32BIT)
kunit_skip(test, "Unable to test on 32bit");
KUNIT_ASSERT_GT(test, common->max_vasz_lg2,
pt_top_range(common).max_vasz_lg2);
if (common->max_vasz_lg2 <= pt_top_range(common).max_vasz_lg2)
kunit_skip(test,
"max_vasz_lg2 fits in starting level, no growth possible");
/* Add every possible level to the max */
while (common->max_vasz_lg2 != pt_top_range(common).max_vasz_lg2) {