[<prev] [next>] [day] [month] [year] [list]
Message-Id: <20240718052504.356517-1-dev.jain@arm.com>
Date: Thu, 18 Jul 2024 10:55:04 +0530
From: Dev Jain <dev.jain@....com>
To: akpm@...ux-foundation.org,
shuah@...nel.org
Cc: linux-kernel@...r.kernel.org,
linux-kselftest@...r.kernel.org,
linux-mm@...ck.org,
Anshuman.Khandual@....com,
ryan.roberts@....com,
broonie@...nel.org,
Dev Jain <dev.jain@....com>
Subject: [PATCH v2] selftests/mm: Skip test for non-LPA2 and non-LVA systems
Post my improvement of the test:
https://lore.kernel.org/all/20240522070435.773918-3-dev.jain@arm.com/
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.
v1->v2:
- Guard with ifdeffery to prevent compiler warning on other arches
Signed-off-by: Dev Jain <dev.jain@....com>
Reviewed-by: Ryan Roberts <ryan.roberts@....com>
---
The patch applies on linux-next.
tools/testing/selftests/mm/va_high_addr_switch.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/mm/va_high_addr_switch.c b/tools/testing/selftests/mm/va_high_addr_switch.c
index fa7eabfaf841..896b3f73fc53 100644
--- a/tools/testing/selftests/mm/va_high_addr_switch.c
+++ b/tools/testing/selftests/mm/va_high_addr_switch.c
@@ -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
--
2.34.1
Powered by blists - more mailing lists