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selftests/mm: skip test for non-LPA2 and non-LVA systems

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Post my improvement of the test in e4a4ba4154 ("selftests/mm:
va_high_addr_switch: dynamically initialize testcases to enable LPA2
testing"):

The test begins to fail on 4k and 16k pages, on non-LPA2 systems.  To
reduce noise in the CI systems, let us skip the test when higher address
space is not implemented.

Link: https://lkml.kernel.org/r/20240718052504.356517-1-dev.jain@arm.com
Fixes: e4a4ba4154 ("selftests/mm: va_high_addr_switch: dynamically initialize testcases to enable LPA2 testing")
Signed-off-by: Dev Jain <dev.jain@arm.com>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Dev Jain 2024-07-18 10:55:04 +05:30 committed by Andrew Morton
parent 66eca1021a
commit f556acc2fa
1 changed files with 15 additions and 1 deletions
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16
tools/testing/selftests/mm/va_high_addr_switch.c
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@ -293,6 +293,20 @@ static int run_test(struct testcase *test, int count)
return ret;
}
#ifdef __aarch64__
/* Check if userspace VA > 48 bits */
static int high_address_present(void)
{
void *ptr = mmap((void *)(1UL << 50), 1, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
if (ptr == MAP_FAILED)
return 0;
munmap(ptr, 1);
return 1;
}
#endif
static int supported_arch(void)
{
#if defined(__powerpc64__)
@ -300,7 +314,7 @@ static int supported_arch(void)
#elif defined(__x86_64__)
return 1;
#elif defined(__aarch64__)
return 1;
return high_address_present();
#else
return 0;
#endif