selftests/powerpc/pmu: Add selftest for group constraint check for radix_scope_qual...

Testcase for group constraint check for radix_scope_qual field which is
used to program Monitor Mode Control Register (MMCR1) bit 18. All events
in the group should match radix_scope_qual bit, otherwise event_open for
the group should fail. Testcase uses "0x14242" (PM_DATA_RADIX_PROCESS_L2_PTE_FROM_L2)
with radix_scope_qual bit set for power10.

Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220610134113.62991-21-atrajeev@linux.vnet.ibm.com

diff --git a/tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile b/tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile
index ace100e..5b61fb0 100644 (file)
--- a/tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile
+++ b/tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile
@@ -2,7 +2,7 @@
 CFLAGS += -m64
 
 TEST_GEN_PROGS := group_constraint_pmc56_test group_pmc56_exclude_constraints_test group_constraint_pmc_count_test \
-       group_constraint_repeat_test
+       group_constraint_repeat_test group_constraint_radix_scope_qual_test
 
 top_srcdir = ../../../../../..
 include ../../../lib.mk

diff --git a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_radix_scope_qual_test.c b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_radix_scope_qual_test.c
new file mode 100644 (file)
index 0000000..9225618
--- /dev/null
+++ b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_radix_scope_qual_test.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2022, Athira Rajeev, IBM Corp.
+ */
+
+#include <stdio.h>
+#include "../event.h"
+#include "../sampling_tests/misc.h"
+
+/* PM_DATA_RADIX_PROCESS_L2_PTE_FROM_L2 */
+#define EventCode_1 0x14242
+/* PM_DATA_RADIX_PROCESS_L2_PTE_FROM_L3 */
+#define EventCode_2 0x24242
+
+/*
+ * Testcase for group constraint check for radix_scope_qual
+ * field which is used to program Monitor Mode Control
+ * egister (MMCR1)  bit 18.
+ * All events in the group should match radix_scope_qual,
+ * bits otherwise event_open for the group should fail.
+ */
+
+static int group_constraint_radix_scope_qual(void)
+{
+       struct event event, leader;
+
+       /*
+        * Check for platform support for the test.
+        * This test is aplicable on power10 only.
+        */
+       SKIP_IF(platform_check_for_tests());
+       SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
+
+       /* Init the events for the group contraint check for radix_scope_qual bits */
+       event_init(&leader, EventCode_1);
+       FAIL_IF(event_open(&leader));
+
+       event_init(&event, 0x200fc);
+
+       /* Expected to fail as sibling event doesn't request same radix_scope_qual bits as leader */
+       FAIL_IF(!event_open_with_group(&event, leader.fd));
+
+       event_init(&event, EventCode_2);
+       /* Expected to pass as sibling event request same radix_scope_qual bits as leader */
+       FAIL_IF(event_open_with_group(&event, leader.fd));
+
+       event_close(&leader);
+       event_close(&event);
+       return 0;
+}
+
+int main(void)
+{
+       return test_harness(group_constraint_radix_scope_qual,
+                           "group_constraint_radix_scope_qual");
+}