[PATCH 3/3] tools/testing/selftests/powerpc: Update the bhrb filter sampling test to test for multiple branch filters

[Athira Rajeev]

For PERF_SAMPLE_BRANCH_STACK sample type, different branch_sample_type,
ie branch filters are supported. The testcase "bhrb_filter_map_test"
tests the valid and invalid filter maps in different powerpc platforms.
Update this testcase to include scenario to cover multiple branch
filters at sametime. Since powerpc doesn't support multiple filters at
sametime, expect failure during perf_event_open.

Reported-by: Disha Goel <disgoel at linux.vnet.ibm.com>
Signed-off-by: Athira Rajeev <atrajeev at linux.vnet.ibm.com>
---
 .../powerpc/pmu/sampling_tests/bhrb_filter_map_test.c    | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/bhrb_filter_map_test.c b/tools/testing/selftests/powerpc/pmu/sampling_tests/bhrb_filter_map_test.c
index 8182647c63c8..605669d4e4cb 100644
--- a/tools/testing/selftests/powerpc/pmu/sampling_tests/bhrb_filter_map_test.c
+++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/bhrb_filter_map_test.c
@@ -96,6 +96,15 @@ static int bhrb_filter_map_test(void)
 		}
 	}
 
+	/*
+	 * Combine filter maps which includes a valid branch filter and an invalid branch
+	 * filter. Example: any ( PERF_SAMPLE_BRANCH_ANY) and save_type
+	 * (PERF_SAMPLE_BRANCH_TYPE_SAVE).
+	 * The perf_event_open should fail in this case.
+	 */
+	event.attr.branch_sample_type = PERF_SAMPLE_BRANCH_ANY | PERF_SAMPLE_BRANCH_TYPE_SAVE;
+	FAIL_IF(!event_open(&event));
+
 	return 0;
 }
 
-- 
2.31.1