membarrier/selftest: Test global expedited command

Test the new MEMBARRIER_CMD_GLOBAL_EXPEDITED and
MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED commands.

Adapt to the MEMBARRIER_CMD_SHARED -> MEMBARRIER_CMD_GLOBAL rename.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Shuah Khan <shuahkh@osg.samsung.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Alice Ferrazzi <alice.ferrazzi@gmail.com>
Cc: Andrea Parri <parri.andrea@gmail.com>
Cc: Andrew Hunter <ahh@google.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Avi Kivity <avi@scylladb.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Dave Watson <davejwatson@fb.com>
Cc: David Sehr <sehr@google.com>
Cc: Greg Hackmann <ghackmann@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Maged Michael <maged.michael@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Elder <paul.elder@pitt.edu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-api@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Link: http://lkml.kernel.org/r/20180129202020.8515-6-mathieu.desnoyers@efficios.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/tools/testing/selftests/membarrier/membarrier_test.c b/tools/testing/selftests/membarrier/membarrier_test.c
index e6ee73d..eec39a0 100644 (file)
--- a/tools/testing/selftests/membarrier/membarrier_test.c
+++ b/tools/testing/selftests/membarrier/membarrier_test.c
@@ -59,10 +59,10 @@ static int test_membarrier_flags_fail(void)
        return 0;
 }
 
-static int test_membarrier_shared_success(void)
+static int test_membarrier_global_success(void)
 {
-       int cmd = MEMBARRIER_CMD_SHARED, flags = 0;
-       const char *test_name = "sys membarrier MEMBARRIER_CMD_SHARED";
+       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(
@@ -132,6 +132,40 @@ static int test_membarrier_private_expedited_success(void)
        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;
@@ -142,7 +176,7 @@ static int test_membarrier(void)
        status = test_membarrier_flags_fail();
        if (status)
                return status;
-       status = test_membarrier_shared_success();
+       status = test_membarrier_global_success();
        if (status)
                return status;
        status = test_membarrier_private_expedited_fail();
@@ -154,6 +188,19 @@ static int test_membarrier(void)
        status = test_membarrier_private_expedited_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;
 }
 
@@ -173,8 +220,10 @@ static int test_membarrier_query(void)
                }
                ksft_exit_fail_msg("sys_membarrier() failed\n");
        }
-       if (!(ret & MEMBARRIER_CMD_SHARED))
+       if (!(ret & MEMBARRIER_CMD_GLOBAL)) {
+               ksft_test_result_fail("sys_membarrier() CMD_GLOBAL query failed\n");
                ksft_exit_fail_msg("sys_membarrier is not supported.\n");
+       }
 
        ksft_test_result_pass("sys_membarrier available\n");
        return 0;