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Message-Id: <20180117165458.13330-6-mathieu.desnoyers@efficios.com>
Date: Wed, 17 Jan 2018 11:54:52 -0500
From: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To: Ingo Molnar <mingo@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Thomas Gleixner <tglx@...utronix.de>
Cc: linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
Andy Lutomirski <luto@...nel.org>,
"Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
Boqun Feng <boqun.feng@...il.com>,
Andrew Hunter <ahh@...gle.com>,
Maged Michael <maged.michael@...il.com>,
Avi Kivity <avi@...lladb.com>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
Michael Ellerman <mpe@...erman.id.au>,
Dave Watson <davejwatson@...com>,
"H . Peter Anvin" <hpa@...or.com>,
Andrea Parri <parri.andrea@...il.com>,
Russell King <linux@...linux.org.uk>,
Greg Hackmann <ghackmann@...gle.com>,
Will Deacon <will.deacon@....com>,
David Sehr <sehr@...gle.com>,
Linus Torvalds <torvalds@...ux-foundation.org>, x86@...nel.org,
Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Alan Stern <stern@...land.harvard.edu>,
Alice Ferrazzi <alice.ferrazzi@...il.com>,
Paul Elder <paul.elder@...t.edu>,
linux-kselftest@...r.kernel.org, linux-arch@...r.kernel.org
Subject: [PATCH for 4.16 05/11] membarrier: selftest: Test global expedited cmd (v2)
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@...icios.com>
Acked-by: Shuah Khan <shuahkh@....samsung.com>
CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC: Peter Zijlstra <peterz@...radead.org>
CC: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
CC: Boqun Feng <boqun.feng@...il.com>
CC: Andrew Hunter <ahh@...gle.com>
CC: Maged Michael <maged.michael@...il.com>
CC: Avi Kivity <avi@...lladb.com>
CC: Benjamin Herrenschmidt <benh@...nel.crashing.org>
CC: Paul Mackerras <paulus@...ba.org>
CC: Michael Ellerman <mpe@...erman.id.au>
CC: Dave Watson <davejwatson@...com>
CC: Alan Stern <stern@...land.harvard.edu>
CC: Will Deacon <will.deacon@....com>
CC: Andy Lutomirski <luto@...nel.org>
CC: Alice Ferrazzi <alice.ferrazzi@...il.com>
CC: Paul Elder <paul.elder@...t.edu>
CC: linux-kselftest@...r.kernel.org
CC: linux-arch@...r.kernel.org
---
Changes since v1:
- Rename SHARED to GLOBAL.
---
.../testing/selftests/membarrier/membarrier_test.c | 59 ++++++++++++++++++++--
1 file changed, 54 insertions(+), 5 deletions(-)
diff --git a/tools/testing/selftests/membarrier/membarrier_test.c b/tools/testing/selftests/membarrier/membarrier_test.c
index e6ee73d01fa1..eec39a0e1f77 100644
--- 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;
--
2.11.0
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