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Subject[RFC PATCH for 4.15 23/24] membarrier: selftest: Test private expedited sync core cmd
Date
Test the new MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE and
MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE commands.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
CC: Shuah Khan <shuahkh@osg.samsung.com>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: Peter Zijlstra <peterz@infradead.org>
CC: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
CC: Boqun Feng <boqun.feng@gmail.com>
CC: Andrew Hunter <ahh@google.com>
CC: Maged Michael <maged.michael@gmail.com>
CC: Avi Kivity <avi@scylladb.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
CC: Michael Ellerman <mpe@ellerman.id.au>
CC: Dave Watson <davejwatson@fb.com>
CC: Alan Stern <stern@rowland.harvard.edu>
CC: Will Deacon <will.deacon@arm.com>
CC: Andy Lutomirski <luto@kernel.org>
CC: Alice Ferrazzi <alice.ferrazzi@gmail.com>
CC: Paul Elder <paul.elder@pitt.edu>
CC: linux-kselftest@vger.kernel.org
CC: linux-arch@vger.kernel.org
---
.../testing/selftests/membarrier/membarrier_test.c | 73 ++++++++++++++++++++++
1 file changed, 73 insertions(+)

diff --git a/tools/testing/selftests/membarrier/membarrier_test.c b/tools/testing/selftests/membarrier/membarrier_test.c
index bb9c58072c5c..d9ab8b6ee52e 100644
--- a/tools/testing/selftests/membarrier/membarrier_test.c
+++ b/tools/testing/selftests/membarrier/membarrier_test.c
@@ -132,6 +132,63 @@ static int test_membarrier_private_expedited_success(void)
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_shared_expedited_success(void)
{
int cmd = MEMBARRIER_CMD_REGISTER_SHARED_EXPEDITED, flags = 0;
@@ -188,6 +245,22 @@ static int test_membarrier(void)
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 shared membarrier from a non-registered
* process.
--
2.11.0
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