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kselftest/arm64: mte: Skip the hugetlb tests if MTE not supported on such mappings

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While the kselftest was added at the same time with the kernel support
for MTE on hugetlb mappings, the tests may be run on older kernels. Skip
the tests if PROT_MTE is not supported on MAP_HUGETLB mappings.

Fixes: 27879e8cb6 ("selftests: arm64: add hugetlb mte tests")
Cc: Yang Shi <yang@os.amperecomputing.com>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Reviewed-by: Yang Shi <yang@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20250221093331.2184245-3-catalin.marinas@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Catalin Marinas 2025-02-21 09:33:31 +00:00
parent 7ae95109c6
commit 306219d59b
1 changed files with 11 additions and 0 deletions
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11
tools/testing/selftests/arm64/mte/check_hugetlb_options.c
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@ -227,6 +227,8 @@ static int check_child_hugetlb_memory_mapping(int mem_type, int mode, int mappin
int main(int argc, char *argv[])
{
int err;
void *map_ptr;
unsigned long map_size;
err = mte_default_setup();
if (err)
@ -243,6 +245,15 @@ int main(int argc, char *argv[])
return KSFT_FAIL;
}
/* Check if MTE supports hugetlb mappings */
map_size = default_huge_page_size();
map_ptr = mmap(NULL, map_size, PROT_READ | PROT_MTE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB, -1, 0);
if (map_ptr == MAP_FAILED)
ksft_exit_skip("PROT_MTE not supported with MAP_HUGETLB mappings\n");
else
munmap(map_ptr, map_size);
/* Set test plan */
ksft_set_plan(12);