The patch titled
Subject: selftests/mm: skip test for non-LPA2 and non-LVA systems
has been added to the -mm mm-unstable branch. Its filename is
selftests-mm-skip-test-for-non-lpa2-and-non-lva-systems.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-mm-skip-test-for-non-lpa2-and-non-lva-systems.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Dev Jain <dev.jain@xxxxxxx>
Subject: selftests/mm: skip test for non-LPA2 and non-LVA systems
Date: Thu, 18 Jul 2024 10:55:04 +0530
Post my improvement of the test in e4a4ba415419 ("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@xxxxxxx
Fixes: e4a4ba415419 ("selftests/mm: va_high_addr_switch: dynamically initialize testcases to enable LPA2 testing")
Signed-off-by: Dev Jain <dev.jain@xxxxxxx>
Reviewed-by: Ryan Roberts <ryan.roberts@xxxxxxx>
Cc: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Cc: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/mm/va_high_addr_switch.c | 16 ++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
--- a/tools/testing/selftests/mm/va_high_addr_switch.c~selftests-mm-skip-test-for-non-lpa2-and-non-lva-systems
+++ a/tools/testing/selftests/mm/va_high_addr_switch.c
@@ -293,6 +293,20 @@ static int run_test(struct testcase *tes
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
_
Patches currently in -mm which might be from dev.jain@xxxxxxx are
selftests-mm-skip-test-for-non-lpa2-and-non-lva-systems.patch
