[PATCH] selftests/powerpc: Add test of L3 bank handling

[Michael Ellerman <mpe@ellerman.id.au>]

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
 tools/testing/selftests/powerpc/pmu/Makefile       |  2 +-
 tools/testing/selftests/powerpc/pmu/l3_bank_test.c | 48 ++++++++++++++++++++++
 2 files changed, 49 insertions(+), 1 deletion(-)
 create mode 100644 tools/testing/selftests/powerpc/pmu/l3_bank_test.c

diff --git a/tools/testing/selftests/powerpc/pmu/Makefile b/tools/testing/selftests/powerpc/pmu/Makefile
index b9ff0db42c79..8f1aca38c055 100644
--- a/tools/testing/selftests/powerpc/pmu/Makefile
+++ b/tools/testing/selftests/powerpc/pmu/Makefile
@@ -1,7 +1,7 @@
 noarg:
 	$(MAKE) -C ../
 
-PROGS := count_instructions
+PROGS := count_instructions l3_bank_test
 EXTRA_SOURCES := ../harness.c event.c
 
 all: $(PROGS) sub_all
diff --git a/tools/testing/selftests/powerpc/pmu/l3_bank_test.c b/tools/testing/selftests/powerpc/pmu/l3_bank_test.c
new file mode 100644
index 000000000000..77472f31441e
--- /dev/null
+++ b/tools/testing/selftests/powerpc/pmu/l3_bank_test.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2014, Michael Ellerman, IBM Corp.
+ * Licensed under GPLv2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "event.h"
+#include "utils.h"
+
+#define MALLOC_SIZE     (0x10000 * 10)  /* Ought to be enough .. */
+
+/*
+ * Tests that the L3 bank handling is correct. We fixed it in commit e9aaac1.
+ */
+static int l3_bank_test(void)
+{
+	struct event event;
+	char *p;
+	int i;
+
+	p = malloc(MALLOC_SIZE);
+	FAIL_IF(!p);
+
+	event_init(&event, 0x84918F);
+
+	FAIL_IF(event_open(&event));
+
+	for (i = 0; i < MALLOC_SIZE; i += 0x10000)
+		p[i] = i;
+
+	event_read(&event);
+	event_report(&event);
+
+	FAIL_IF(event.result.running == 0);
+	FAIL_IF(event.result.enabled == 0);
+
+	event_close(&event);
+	free(p);
+
+	return 0;
+}
+
+int main(void)
+{
+	return test_harness(l3_bank_test, "l3_bank_test");
+}
-- 
1.9.1