selftests/resctrl: Modularize resctrl test suite main() function

Resctrl test suite main() function does the following things
1. Parses command line arguments passed by user
2. Some setup checks
3. Logic that calls into each unit test
4. Print result and clean up after running each unit test

Introduce wrapper functions for steps 3 and 4 to modularize the main()
function. Adding these wrapper functions makes it easier to add any logic
to each individual test.

Please note that this is a preparatory patch for the next one and no
functional changes are intended.

Suggested-by: Reinette Chatre <[e-mail]>
Tested-by: Babu Moger <[e-mail]>
Signed-off-by: Fenghua Yu <[e-mail]>
Signed-off-by: Shuah Khan <[e-mail]>

tools/testing/selftests/resctrl/resctrl_tests.c

···
 	cat_test_cleanup();
 }
 
+static void run_mbm_test(bool has_ben, char **benchmark_cmd, int span,
+			 int cpu_no, char *bw_report)
+{
+	int res;
+
+	ksft_print_msg("Starting MBM BW change ...\n");
+	if (!has_ben)
+		sprintf(benchmark_cmd[5], "%s", MBA_STR);
+	res = mbm_bw_change(span, cpu_no, bw_report, benchmark_cmd);
+	ksft_test_result(!res, "MBM: bw change\n");
+	mbm_test_cleanup();
+}
+
+static void run_mba_test(bool has_ben, char **benchmark_cmd, int span,
+			 int cpu_no, char *bw_report)
+{
+	int res;
+
+	ksft_print_msg("Starting MBA Schemata change ...\n");
+	if (!has_ben)
+		sprintf(benchmark_cmd[1], "%d", span);
+	res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd);
+	ksft_test_result(!res, "MBA: schemata change\n");
+	mba_test_cleanup();
+}
+
+static void run_cmt_test(bool has_ben, char **benchmark_cmd, int cpu_no)
+{
+	int res;
+
+	ksft_print_msg("Starting CMT test ...\n");
+	if (!has_ben)
+		sprintf(benchmark_cmd[5], "%s", CMT_STR);
+	res = cmt_resctrl_val(cpu_no, 5, benchmark_cmd);
+	ksft_test_result(!res, "CMT: test\n");
+	cmt_test_cleanup();
+}
+
+static void run_cat_test(int cpu_no, int no_of_bits)
+{
+	int res;
+
+	ksft_print_msg("Starting CAT test ...\n");
+	res = cat_perf_miss_val(cpu_no, no_of_bits, "L3");
+	ksft_test_result(!res, "CAT: test\n");
+	cat_test_cleanup();
+}
+
 int main(int argc, char **argv)
 {
 	bool has_ben = false, mbm_test = true, mba_test = true, cmt_test = true;
-	int res, c, cpu_no = 1, span = 250, argc_new = argc, i, no_of_bits = 0;
+	int c, cpu_no = 1, span = 250, argc_new = argc, i, no_of_bits = 0;
 	char *benchmark_cmd[BENCHMARK_ARGS], bw_report[64], bm_type[64];
 	char benchmark_cmd_area[BENCHMARK_ARGS][BENCHMARK_ARG_SIZE];
 	int ben_ind, ben_count, tests = 0;
···
 
 	ksft_set_plan(tests ? : 4);
 
-	if (!is_amd && mbm_test) {
-		ksft_print_msg("Starting MBM BW change ...\n");
-		if (!has_ben)
-			sprintf(benchmark_cmd[5], "%s", MBA_STR);
-		res = mbm_bw_change(span, cpu_no, bw_report, benchmark_cmd);
-		ksft_test_result(!res, "MBM: bw change\n");
-		mbm_test_cleanup();
-	}
+	if (!is_amd && mbm_test)
+		run_mbm_test(has_ben, benchmark_cmd, span, cpu_no, bw_report);
 
-	if (!is_amd && mba_test) {
-		ksft_print_msg("Starting MBA Schemata change ...\n");
-		if (!has_ben)
-			sprintf(benchmark_cmd[1], "%d", span);
-		res = mba_schemata_change(cpu_no, bw_report, benchmark_cmd);
-		ksft_test_result(!res, "MBA: schemata change\n");
-		mba_test_cleanup();
-	}
+	if (!is_amd && mba_test)
+		run_mba_test(has_ben, benchmark_cmd, span, cpu_no, bw_report);
 
-	if (cmt_test) {
-		ksft_print_msg("Starting CMT test ...\n");
-		if (!has_ben)
-			sprintf(benchmark_cmd[5], "%s", CMT_STR);
-		res = cmt_resctrl_val(cpu_no, 5, benchmark_cmd);
-		ksft_test_result(!res, "CMT: test\n");
-		cmt_test_cleanup();
-	}
+	if (cmt_test)
+		run_cmt_test(has_ben, benchmark_cmd, cpu_no);
 
-	if (cat_test) {
-		ksft_print_msg("Starting CAT test ...\n");
-		res = cat_perf_miss_val(cpu_no, no_of_bits, "L3");
-		ksft_test_result(!res, "CAT: test\n");
-		cat_test_cleanup();
-	}
+	if (cat_test)
+		run_cat_test(cpu_no, no_of_bits);
 
 	return ksft_exit_pass();
 }