From: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Date: Wed, 15 Feb 2023 13:05:59 +0000 (+0200)
Subject: selftests/resctrl: Allow ->setup() to return errors
X-Git-Tag: v6.1.37~1915
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bceef0c7f6ed635aec972d221f2c7827f5cb548b;p=platform%2Fkernel%2Flinux-starfive.git

selftests/resctrl: Allow ->setup() to return errors

[ Upstream commit fa10366cc6f4cc862871f8938426d85c2481f084 ]

resctrl_val() assumes ->setup() always returns either 0 to continue
tests or < 0 in case of the normal termination of tests after x runs.
The latter overlaps with normal error returns.

Define END_OF_TESTS (=1) to differentiate the normal termination of
tests and return errors as negative values. Alter callers of ->setup()
to handle errors properly.

Fixes: 790bf585b0ee ("selftests/resctrl: Add Cache Allocation Technology (CAT) selftest")
Fixes: ecdbb911f22d ("selftests/resctrl: Add MBM test")
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/tools/testing/selftests/resctrl/cache.c b/tools/testing/selftests/resctrl/cache.c
index 68ff856..0485863 100644
--- a/tools/testing/selftests/resctrl/cache.c
+++ b/tools/testing/selftests/resctrl/cache.c
@@ -244,10 +244,12 @@ int cat_val(struct resctrl_val_param *param)
 	while (1) {
 		if (!strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR))) {
 			ret = param->setup(1, param);
-			if (ret) {
+			if (ret == END_OF_TESTS) {
 				ret = 0;
 				break;
 			}
+			if (ret < 0)
+				break;
 			ret = reset_enable_llc_perf(bm_pid, param->cpu_no);
 			if (ret)
 				break;
diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/selftests/resctrl/cat_test.c
index 1c5e90c..2d3c7c7 100644
--- a/tools/testing/selftests/resctrl/cat_test.c
+++ b/tools/testing/selftests/resctrl/cat_test.c
@@ -40,7 +40,7 @@ static int cat_setup(int num, ...)
 
 	/* Run NUM_OF_RUNS times */
 	if (p->num_of_runs >= NUM_OF_RUNS)
-		return -1;
+		return END_OF_TESTS;
 
 	if (p->num_of_runs == 0) {
 		sprintf(schemata, "%lx", p->mask);
diff --git a/tools/testing/selftests/resctrl/cmt_test.c b/tools/testing/selftests/resctrl/cmt_test.c
index 8968e36..3b0454e 100644
--- a/tools/testing/selftests/resctrl/cmt_test.c
+++ b/tools/testing/selftests/resctrl/cmt_test.c
@@ -32,7 +32,7 @@ static int cmt_setup(int num, ...)
 
 	/* Run NUM_OF_RUNS times */
 	if (p->num_of_runs >= NUM_OF_RUNS)
-		return -1;
+		return END_OF_TESTS;
 
 	p->num_of_runs++;
 
diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c
index 1a1bdb6..f32289a 100644
--- a/tools/testing/selftests/resctrl/mba_test.c
+++ b/tools/testing/selftests/resctrl/mba_test.c
@@ -41,7 +41,7 @@ static int mba_setup(int num, ...)
 		return 0;
 
 	if (allocation < ALLOCATION_MIN || allocation > ALLOCATION_MAX)
-		return -1;
+		return END_OF_TESTS;
 
 	sprintf(allocation_str, "%d", allocation);
 
diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c
index 8392e5c..2801876 100644
--- a/tools/testing/selftests/resctrl/mbm_test.c
+++ b/tools/testing/selftests/resctrl/mbm_test.c
@@ -95,7 +95,7 @@ static int mbm_setup(int num, ...)
 
 	/* Run NUM_OF_RUNS times */
 	if (num_of_runs++ >= NUM_OF_RUNS)
-		return -1;
+		return END_OF_TESTS;
 
 	va_start(param, num);
 	p = va_arg(param, struct resctrl_val_param *);
diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h
index f0ded31..f44fa2d 100644
--- a/tools/testing/selftests/resctrl/resctrl.h
+++ b/tools/testing/selftests/resctrl/resctrl.h
@@ -37,6 +37,8 @@
 #define ARCH_INTEL     1
 #define ARCH_AMD       2
 
+#define END_OF_TESTS	1
+
 #define PARENT_EXIT(err_msg)			\
 	do {					\
 		perror(err_msg);		\
diff --git a/tools/testing/selftests/resctrl/resctrl_val.c b/tools/testing/selftests/resctrl/resctrl_val.c
index 787546a..0086424 100644
--- a/tools/testing/selftests/resctrl/resctrl_val.c
+++ b/tools/testing/selftests/resctrl/resctrl_val.c
@@ -735,10 +735,12 @@ int resctrl_val(char **benchmark_cmd, struct resctrl_val_param *param)
 	/* Test runs until the callback setup() tells the test to stop. */
 	while (1) {
 		ret = param->setup(1, param);
-		if (ret) {
+		if (ret == END_OF_TESTS) {
 			ret = 0;
 			break;
 		}
+		if (ret < 0)
+			break;
 
 		if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR)) ||
 		    !strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR))) {