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Subject[tip: sched/urgent] selftests, sched/membarrier: Add multi-threaded test
The following commit has been merged into the sched/urgent branch of tip:

Commit-ID: 19a4ff534bb09686f53800564cb977bad2177c00
Gitweb: https://git.kernel.org/tip/19a4ff534bb09686f53800564cb977bad2177c00
Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
AuthorDate: Thu, 19 Sep 2019 13:37:03 -04:00
Committer: Ingo Molnar <mingo@kernel.org>
CommitterDate: Wed, 25 Sep 2019 17:42:31 +02:00

selftests, sched/membarrier: Add multi-threaded test

membarrier commands cover very different code paths if they are in
a single-threaded vs multi-threaded process. Therefore, exercise both
scenarios in the kernel selftests to increase coverage of this selftest.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Kirill Tkhai <tkhai@yandex.ru>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King - ARM Linux admin <linux@armlinux.org.uk>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20190919173705.2181-6-mathieu.desnoyers@efficios.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
tools/testing/selftests/membarrier/.gitignore | 3 +-
tools/testing/selftests/membarrier/Makefile | 5 +-
tools/testing/selftests/membarrier/membarrier_test.c | 313 +---------------------------------------------------------------------
tools/testing/selftests/membarrier/membarrier_test_impl.h | 317 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
tools/testing/selftests/membarrier/membarrier_test_multi_thread.c | 73 ++++++++++++++++-
tools/testing/selftests/membarrier/membarrier_test_single_thread.c | 24 +++++-
6 files changed, 419 insertions(+), 316 deletions(-)
delete mode 100644 tools/testing/selftests/membarrier/membarrier_test.c
create mode 100644 tools/testing/selftests/membarrier/membarrier_test_impl.h
create mode 100644 tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
create mode 100644 tools/testing/selftests/membarrier/membarrier_test_single_thread.c

diff --git a/tools/testing/selftests/membarrier/.gitignore b/tools/testing/selftests/membarrier/.gitignore
index 020c44f..f2f7ec0 100644
--- a/tools/testing/selftests/membarrier/.gitignore
+++ b/tools/testing/selftests/membarrier/.gitignore
@@ -1 +1,2 @@
-membarrier_test
+membarrier_test_multi_thread
+membarrier_test_single_thread
diff --git a/tools/testing/selftests/membarrier/Makefile b/tools/testing/selftests/membarrier/Makefile
index 97e3bdf..34d1c81 100644
--- a/tools/testing/selftests/membarrier/Makefile
+++ b/tools/testing/selftests/membarrier/Makefile
@@ -1,7 +1,8 @@
# SPDX-License-Identifier: GPL-2.0-only
CFLAGS += -g -I../../../../usr/include/
+LDLIBS += -lpthread

-TEST_GEN_PROGS := membarrier_test
+TEST_GEN_PROGS := membarrier_test_single_thread \
+ membarrier_test_multi_thread

include ../lib.mk
-
diff --git a/tools/testing/selftests/membarrier/membarrier_test.c b/tools/testing/selftests/membarrier/membarrier_test.c
deleted file mode 100644
index 70b4ddb..0000000
--- a/tools/testing/selftests/membarrier/membarrier_test.c
+++ /dev/null
@@ -1,313 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#define _GNU_SOURCE
-#include <linux/membarrier.h>
-#include <syscall.h>
-#include <stdio.h>
-#include <errno.h>
-#include <string.h>
-
-#include "../kselftest.h"
-
-static int sys_membarrier(int cmd, int flags)
-{
- return syscall(__NR_membarrier, cmd, flags);
-}
-
-static int test_membarrier_cmd_fail(void)
-{
- int cmd = -1, flags = 0;
- const char *test_name = "sys membarrier invalid command";
-
- if (sys_membarrier(cmd, flags) != -1) {
- ksft_exit_fail_msg(
- "%s test: command = %d, flags = %d. Should fail, but passed\n",
- test_name, cmd, flags);
- }
- if (errno != EINVAL) {
- ksft_exit_fail_msg(
- "%s test: flags = %d. Should return (%d: \"%s\"), but returned (%d: \"%s\").\n",
- test_name, flags, EINVAL, strerror(EINVAL),
- errno, strerror(errno));
- }
-
- ksft_test_result_pass(
- "%s test: command = %d, flags = %d, errno = %d. Failed as expected\n",
- test_name, cmd, flags, errno);
- return 0;
-}
-
-static int test_membarrier_flags_fail(void)
-{
- int cmd = MEMBARRIER_CMD_QUERY, flags = 1;
- const char *test_name = "sys membarrier MEMBARRIER_CMD_QUERY invalid flags";
-
- if (sys_membarrier(cmd, flags) != -1) {
- ksft_exit_fail_msg(
- "%s test: flags = %d. Should fail, but passed\n",
- test_name, flags);
- }
- if (errno != EINVAL) {
- ksft_exit_fail_msg(
- "%s test: flags = %d. Should return (%d: \"%s\"), but returned (%d: \"%s\").\n",
- test_name, flags, EINVAL, strerror(EINVAL),
- errno, strerror(errno));
- }
-
- ksft_test_result_pass(
- "%s test: flags = %d, errno = %d. Failed as expected\n",
- test_name, flags, errno);
- return 0;
-}
-
-static int test_membarrier_global_success(void)
-{
- int cmd = MEMBARRIER_CMD_GLOBAL, flags = 0;
- const char *test_name = "sys membarrier MEMBARRIER_CMD_GLOBAL";
-
- if (sys_membarrier(cmd, flags) != 0) {
- ksft_exit_fail_msg(
- "%s test: flags = %d, errno = %d\n",
- test_name, flags, errno);
- }
-
- ksft_test_result_pass(
- "%s test: flags = %d\n", test_name, flags);
- return 0;
-}
-
-static int test_membarrier_private_expedited_fail(void)
-{
- int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
- const char *test_name = "sys membarrier MEMBARRIER_CMD_PRIVATE_EXPEDITED not registered failure";
-
- if (sys_membarrier(cmd, flags) != -1) {
- ksft_exit_fail_msg(
- "%s test: flags = %d. Should fail, but passed\n",
- test_name, flags);
- }
- if (errno != EPERM) {
- ksft_exit_fail_msg(
- "%s test: flags = %d. Should return (%d: \"%s\"), but returned (%d: \"%s\").\n",
- test_name, flags, EPERM, strerror(EPERM),
- errno, strerror(errno));
- }
-
- ksft_test_result_pass(
- "%s test: flags = %d, errno = %d\n",
- test_name, flags, errno);
- return 0;
-}
-
-static int test_membarrier_register_private_expedited_success(void)
-{
- int cmd = MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED, flags = 0;
- const char *test_name = "sys membarrier MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED";
-
- if (sys_membarrier(cmd, flags) != 0) {
- ksft_exit_fail_msg(
- "%s test: flags = %d, errno = %d\n",
- test_name, flags, errno);
- }
-
- ksft_test_result_pass(
- "%s test: flags = %d\n",
- test_name, flags);
- return 0;
-}
-
-static int test_membarrier_private_expedited_success(void)
-{
- int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
- const char *test_name = "sys membarrier MEMBARRIER_CMD_PRIVATE_EXPEDITED";
-
- if (sys_membarrier(cmd, flags) != 0) {
- ksft_exit_fail_msg(
- "%s test: flags = %d, errno = %d\n",
- test_name, flags, errno);
- }
-
- ksft_test_result_pass(
- "%s test: flags = %d\n",
- test_name, flags);
- return 0;
-}
-
-static int test_membarrier_private_expedited_sync_core_fail(void)
-{
- int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE, flags = 0;
- const char *test_name = "sys membarrier MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE not registered failure";
-
- if (sys_membarrier(cmd, flags) != -1) {
- ksft_exit_fail_msg(
- "%s test: flags = %d. Should fail, but passed\n",
- test_name, flags);
- }
- if (errno != EPERM) {
- ksft_exit_fail_msg(
- "%s test: flags = %d. Should return (%d: \"%s\"), but returned (%d: \"%s\").\n",
- test_name, flags, EPERM, strerror(EPERM),
- errno, strerror(errno));
- }
-
- ksft_test_result_pass(
- "%s test: flags = %d, errno = %d\n",
- test_name, flags, errno);
- return 0;
-}
-
-static int test_membarrier_register_private_expedited_sync_core_success(void)
-{
- int cmd = MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE, flags = 0;
- const char *test_name = "sys membarrier MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE";
-
- if (sys_membarrier(cmd, flags) != 0) {
- ksft_exit_fail_msg(
- "%s test: flags = %d, errno = %d\n",
- test_name, flags, errno);
- }
-
- ksft_test_result_pass(
- "%s test: flags = %d\n",
- test_name, flags);
- return 0;
-}
-
-static int test_membarrier_private_expedited_sync_core_success(void)
-{
- int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
- const char *test_name = "sys membarrier MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE";
-
- if (sys_membarrier(cmd, flags) != 0) {
- ksft_exit_fail_msg(
- "%s test: flags = %d, errno = %d\n",
- test_name, flags, errno);
- }
-
- ksft_test_result_pass(
- "%s test: flags = %d\n",
- test_name, flags);
- return 0;
-}
-
-static int test_membarrier_register_global_expedited_success(void)
-{
- int cmd = MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED, flags = 0;
- const char *test_name = "sys membarrier MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED";
-
- if (sys_membarrier(cmd, flags) != 0) {
- ksft_exit_fail_msg(
- "%s test: flags = %d, errno = %d\n",
- test_name, flags, errno);
- }
-
- ksft_test_result_pass(
- "%s test: flags = %d\n",
- test_name, flags);
- return 0;
-}
-
-static int test_membarrier_global_expedited_success(void)
-{
- int cmd = MEMBARRIER_CMD_GLOBAL_EXPEDITED, flags = 0;
- const char *test_name = "sys membarrier MEMBARRIER_CMD_GLOBAL_EXPEDITED";
-
- if (sys_membarrier(cmd, flags) != 0) {
- ksft_exit_fail_msg(
- "%s test: flags = %d, errno = %d\n",
- test_name, flags, errno);
- }
-
- ksft_test_result_pass(
- "%s test: flags = %d\n",
- test_name, flags);
- return 0;
-}
-
-static int test_membarrier(void)
-{
- int status;
-
- status = test_membarrier_cmd_fail();
- if (status)
- return status;
- status = test_membarrier_flags_fail();
- if (status)
- return status;
- status = test_membarrier_global_success();
- if (status)
- return status;
- status = test_membarrier_private_expedited_fail();
- if (status)
- return status;
- status = test_membarrier_register_private_expedited_success();
- if (status)
- return status;
- status = test_membarrier_private_expedited_success();
- if (status)
- return status;
- status = sys_membarrier(MEMBARRIER_CMD_QUERY, 0);
- if (status < 0) {
- ksft_test_result_fail("sys_membarrier() failed\n");
- return status;
- }
- if (status & MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE) {
- status = test_membarrier_private_expedited_sync_core_fail();
- if (status)
- return status;
- status = test_membarrier_register_private_expedited_sync_core_success();
- if (status)
- return status;
- status = test_membarrier_private_expedited_sync_core_success();
- if (status)
- return status;
- }
- /*
- * It is valid to send a global membarrier from a non-registered
- * process.
- */
- status = test_membarrier_global_expedited_success();
- if (status)
- return status;
- status = test_membarrier_register_global_expedited_success();
- if (status)
- return status;
- status = test_membarrier_global_expedited_success();
- if (status)
- return status;
- return 0;
-}
-
-static int test_membarrier_query(void)
-{
- int flags = 0, ret;
-
- ret = sys_membarrier(MEMBARRIER_CMD_QUERY, flags);
- if (ret < 0) {
- if (errno == ENOSYS) {
- /*
- * It is valid to build a kernel with
- * CONFIG_MEMBARRIER=n. However, this skips the tests.
- */
- ksft_exit_skip(
- "sys membarrier (CONFIG_MEMBARRIER) is disabled.\n");
- }
- ksft_exit_fail_msg("sys_membarrier() failed\n");
- }
- if (!(ret & MEMBARRIER_CMD_GLOBAL))
- ksft_exit_skip(
- "sys_membarrier unsupported: CMD_GLOBAL not found.\n");
-
- ksft_test_result_pass("sys_membarrier available\n");
- return 0;
-}
-
-int main(int argc, char **argv)
-{
- ksft_print_header();
- ksft_set_plan(13);
-
- test_membarrier_query();
- test_membarrier();
-
- return ksft_exit_pass();
-}
diff --git a/tools/testing/selftests/membarrier/membarrier_test_impl.h b/tools/testing/selftests/membarrier/membarrier_test_impl.h
new file mode 100644
index 0000000..186be69
--- /dev/null
+++ b/tools/testing/selftests/membarrier/membarrier_test_impl.h
@@ -0,0 +1,317 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#define _GNU_SOURCE
+#include <linux/membarrier.h>
+#include <syscall.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <pthread.h>
+
+#include "../kselftest.h"
+
+static int sys_membarrier(int cmd, int flags)
+{
+ return syscall(__NR_membarrier, cmd, flags);
+}
+
+static int test_membarrier_cmd_fail(void)
+{
+ int cmd = -1, flags = 0;
+ const char *test_name = "sys membarrier invalid command";
+
+ if (sys_membarrier(cmd, flags) != -1) {
+ ksft_exit_fail_msg(
+ "%s test: command = %d, flags = %d. Should fail, but passed\n",
+ test_name, cmd, flags);
+ }
+ if (errno != EINVAL) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d. Should return (%d: \"%s\"), but returned (%d: \"%s\").\n",
+ test_name, flags, EINVAL, strerror(EINVAL),
+ errno, strerror(errno));
+ }
+
+ ksft_test_result_pass(
+ "%s test: command = %d, flags = %d, errno = %d. Failed as expected\n",
+ test_name, cmd, flags, errno);
+ return 0;
+}
+
+static int test_membarrier_flags_fail(void)
+{
+ int cmd = MEMBARRIER_CMD_QUERY, flags = 1;
+ const char *test_name = "sys membarrier MEMBARRIER_CMD_QUERY invalid flags";
+
+ if (sys_membarrier(cmd, flags) != -1) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d. Should fail, but passed\n",
+ test_name, flags);
+ }
+ if (errno != EINVAL) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d. Should return (%d: \"%s\"), but returned (%d: \"%s\").\n",
+ test_name, flags, EINVAL, strerror(EINVAL),
+ errno, strerror(errno));
+ }
+
+ ksft_test_result_pass(
+ "%s test: flags = %d, errno = %d. Failed as expected\n",
+ test_name, flags, errno);
+ return 0;
+}
+
+static int test_membarrier_global_success(void)
+{
+ int cmd = MEMBARRIER_CMD_GLOBAL, flags = 0;
+ const char *test_name = "sys membarrier MEMBARRIER_CMD_GLOBAL";
+
+ if (sys_membarrier(cmd, flags) != 0) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d, errno = %d\n",
+ test_name, flags, errno);
+ }
+
+ ksft_test_result_pass(
+ "%s test: flags = %d\n", test_name, flags);
+ return 0;
+}
+
+static int test_membarrier_private_expedited_fail(void)
+{
+ int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
+ const char *test_name = "sys membarrier MEMBARRIER_CMD_PRIVATE_EXPEDITED not registered failure";
+
+ if (sys_membarrier(cmd, flags) != -1) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d. Should fail, but passed\n",
+ test_name, flags);
+ }
+ if (errno != EPERM) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d. Should return (%d: \"%s\"), but returned (%d: \"%s\").\n",
+ test_name, flags, EPERM, strerror(EPERM),
+ errno, strerror(errno));
+ }
+
+ ksft_test_result_pass(
+ "%s test: flags = %d, errno = %d\n",
+ test_name, flags, errno);
+ return 0;
+}
+
+static int test_membarrier_register_private_expedited_success(void)
+{
+ int cmd = MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED, flags = 0;
+ const char *test_name = "sys membarrier MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED";
+
+ if (sys_membarrier(cmd, flags) != 0) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d, errno = %d\n",
+ test_name, flags, errno);
+ }
+
+ ksft_test_result_pass(
+ "%s test: flags = %d\n",
+ test_name, flags);
+ return 0;
+}
+
+static int test_membarrier_private_expedited_success(void)
+{
+ int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
+ const char *test_name = "sys membarrier MEMBARRIER_CMD_PRIVATE_EXPEDITED";
+
+ if (sys_membarrier(cmd, flags) != 0) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d, errno = %d\n",
+ test_name, flags, errno);
+ }
+
+ ksft_test_result_pass(
+ "%s test: flags = %d\n",
+ test_name, flags);
+ return 0;
+}
+
+static int test_membarrier_private_expedited_sync_core_fail(void)
+{
+ int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE, flags = 0;
+ const char *test_name = "sys membarrier MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE not registered failure";
+
+ if (sys_membarrier(cmd, flags) != -1) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d. Should fail, but passed\n",
+ test_name, flags);
+ }
+ if (errno != EPERM) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d. Should return (%d: \"%s\"), but returned (%d: \"%s\").\n",
+ test_name, flags, EPERM, strerror(EPERM),
+ errno, strerror(errno));
+ }
+
+ ksft_test_result_pass(
+ "%s test: flags = %d, errno = %d\n",
+ test_name, flags, errno);
+ return 0;
+}
+
+static int test_membarrier_register_private_expedited_sync_core_success(void)
+{
+ int cmd = MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE, flags = 0;
+ const char *test_name = "sys membarrier MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE";
+
+ if (sys_membarrier(cmd, flags) != 0) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d, errno = %d\n",
+ test_name, flags, errno);
+ }
+
+ ksft_test_result_pass(
+ "%s test: flags = %d\n",
+ test_name, flags);
+ return 0;
+}
+
+static int test_membarrier_private_expedited_sync_core_success(void)
+{
+ int cmd = MEMBARRIER_CMD_PRIVATE_EXPEDITED, flags = 0;
+ const char *test_name = "sys membarrier MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE";
+
+ if (sys_membarrier(cmd, flags) != 0) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d, errno = %d\n",
+ test_name, flags, errno);
+ }
+
+ ksft_test_result_pass(
+ "%s test: flags = %d\n",
+ test_name, flags);
+ return 0;
+}
+
+static int test_membarrier_register_global_expedited_success(void)
+{
+ int cmd = MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED, flags = 0;
+ const char *test_name = "sys membarrier MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED";
+
+ if (sys_membarrier(cmd, flags) != 0) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d, errno = %d\n",
+ test_name, flags, errno);
+ }
+
+ ksft_test_result_pass(
+ "%s test: flags = %d\n",
+ test_name, flags);
+ return 0;
+}
+
+static int test_membarrier_global_expedited_success(void)
+{
+ int cmd = MEMBARRIER_CMD_GLOBAL_EXPEDITED, flags = 0;
+ const char *test_name = "sys membarrier MEMBARRIER_CMD_GLOBAL_EXPEDITED";
+
+ if (sys_membarrier(cmd, flags) != 0) {
+ ksft_exit_fail_msg(
+ "%s test: flags = %d, errno = %d\n",
+ test_name, flags, errno);
+ }
+
+ ksft_test_result_pass(
+ "%s test: flags = %d\n",
+ test_name, flags);
+ return 0;
+}
+
+static int test_membarrier_fail(void)
+{
+ int status;
+
+ status = test_membarrier_cmd_fail();
+ if (status)
+ return status;
+ status = test_membarrier_flags_fail();
+ if (status)
+ return status;
+ status = test_membarrier_private_expedited_fail();
+ if (status)
+ return status;
+ status = sys_membarrier(MEMBARRIER_CMD_QUERY, 0);
+ if (status < 0) {
+ ksft_test_result_fail("sys_membarrier() failed\n");
+ return status;
+ }
+ if (status & MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE) {
+ status = test_membarrier_private_expedited_sync_core_fail();
+ if (status)
+ return status;
+ }
+ return 0;
+}
+
+static int test_membarrier_success(void)
+{
+ int status;
+
+ status = test_membarrier_global_success();
+ if (status)
+ return status;
+ status = test_membarrier_register_private_expedited_success();
+ if (status)
+ return status;
+ status = test_membarrier_private_expedited_success();
+ if (status)
+ return status;
+ status = sys_membarrier(MEMBARRIER_CMD_QUERY, 0);
+ if (status < 0) {
+ ksft_test_result_fail("sys_membarrier() failed\n");
+ return status;
+ }
+ if (status & MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE) {
+ status = test_membarrier_register_private_expedited_sync_core_success();
+ if (status)
+ return status;
+ status = test_membarrier_private_expedited_sync_core_success();
+ if (status)
+ return status;
+ }
+ /*
+ * It is valid to send a global membarrier from a non-registered
+ * process.
+ */
+ status = test_membarrier_global_expedited_success();
+ if (status)
+ return status;
+ status = test_membarrier_register_global_expedited_success();
+ if (status)
+ return status;
+ status = test_membarrier_global_expedited_success();
+ if (status)
+ return status;
+ return 0;
+}
+
+static int test_membarrier_query(void)
+{
+ int flags = 0, ret;
+
+ ret = sys_membarrier(MEMBARRIER_CMD_QUERY, flags);
+ if (ret < 0) {
+ if (errno == ENOSYS) {
+ /*
+ * It is valid to build a kernel with
+ * CONFIG_MEMBARRIER=n. However, this skips the tests.
+ */
+ ksft_exit_skip(
+ "sys membarrier (CONFIG_MEMBARRIER) is disabled.\n");
+ }
+ ksft_exit_fail_msg("sys_membarrier() failed\n");
+ }
+ if (!(ret & MEMBARRIER_CMD_GLOBAL))
+ ksft_exit_skip(
+ "sys_membarrier unsupported: CMD_GLOBAL not found.\n");
+
+ ksft_test_result_pass("sys_membarrier available\n");
+ return 0;
+}
diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
new file mode 100644
index 0000000..ac5613e
--- /dev/null
+++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0
+#define _GNU_SOURCE
+#include <linux/membarrier.h>
+#include <syscall.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <pthread.h>
+
+#include "membarrier_test_impl.h"
+
+static int thread_ready, thread_quit;
+static pthread_mutex_t test_membarrier_thread_mutex =
+ PTHREAD_MUTEX_INITIALIZER;
+static pthread_cond_t test_membarrier_thread_cond =
+ PTHREAD_COND_INITIALIZER;
+
+void *test_membarrier_thread(void *arg)
+{
+ pthread_mutex_lock(&test_membarrier_thread_mutex);
+ thread_ready = 1;
+ pthread_cond_broadcast(&test_membarrier_thread_cond);
+ pthread_mutex_unlock(&test_membarrier_thread_mutex);
+
+ pthread_mutex_lock(&test_membarrier_thread_mutex);
+ while (!thread_quit)
+ pthread_cond_wait(&test_membarrier_thread_cond,
+ &test_membarrier_thread_mutex);
+ pthread_mutex_unlock(&test_membarrier_thread_mutex);
+
+ return NULL;
+}
+
+static int test_mt_membarrier(void)
+{
+ int i;
+ pthread_t test_thread;
+
+ pthread_create(&test_thread, NULL,
+ test_membarrier_thread, NULL);
+
+ pthread_mutex_lock(&test_membarrier_thread_mutex);
+ while (!thread_ready)
+ pthread_cond_wait(&test_membarrier_thread_cond,
+ &test_membarrier_thread_mutex);
+ pthread_mutex_unlock(&test_membarrier_thread_mutex);
+
+ test_membarrier_fail();
+
+ test_membarrier_success();
+
+ pthread_mutex_lock(&test_membarrier_thread_mutex);
+ thread_quit = 1;
+ pthread_cond_broadcast(&test_membarrier_thread_cond);
+ pthread_mutex_unlock(&test_membarrier_thread_mutex);
+
+ pthread_join(test_thread, NULL);
+
+ return 0;
+}
+
+int main(int argc, char **argv)
+{
+ ksft_print_header();
+ ksft_set_plan(13);
+
+ test_membarrier_query();
+
+ /* Multi-threaded */
+ test_mt_membarrier();
+
+ return ksft_exit_pass();
+}
diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
new file mode 100644
index 0000000..c1c9639
--- /dev/null
+++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0
+#define _GNU_SOURCE
+#include <linux/membarrier.h>
+#include <syscall.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <pthread.h>
+
+#include "membarrier_test_impl.h"
+
+int main(int argc, char **argv)
+{
+ ksft_print_header();
+ ksft_set_plan(13);
+
+ test_membarrier_query();
+
+ test_membarrier_fail();
+
+ test_membarrier_success();
+
+ return ksft_exit_pass();
+}
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