tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_repeat_test.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2022, Athira Rajeev, IBM Corp.
   4  */
   5
   6 #include <stdio.h>
   7 #include "../event.h"
   8 #include "../sampling_tests/misc.h"
   9
  10 /* The processor's L1 data cache was reloaded */
  11 #define EventCode1 0x21C040
  12 #define EventCode2 0x22C040
  13
  14 /*
  15  * Testcase for group constraint check
  16  * when using events with same PMC.
  17  * Multiple events in a group shouldn't
  18  * ask for same PMC. If so it should fail.
  19  */
  20
  21 static int group_constraint_repeat(void)
  22 {
  23         struct event event, leader;
  24
  25         /* Check for platform support for the test */
  26         SKIP_IF(platform_check_for_tests());
  27
  28         /*
  29          * Two events in a group using same PMC
  30          * should fail to get scheduled. Usei same PMC2
  31          * for leader and sibling event which is expected
  32          * to fail.
  33          */
  34         event_init(&leader, EventCode1);
  35         FAIL_IF(event_open(&leader));
  36
  37         event_init(&event, EventCode1);
  38
  39         /* Expected to fail since sibling event is requesting same PMC as leader */
  40         FAIL_IF(!event_open_with_group(&event, leader.fd));
  41
  42         event_init(&event, EventCode2);
  43
  44         /* Expected to pass since sibling event is requesting different PMC */
  45         FAIL_IF(event_open_with_group(&event, leader.fd));
  46
  47         event_close(&leader);
  48         event_close(&event);
  49
  50         return 0;
  51 }
  52
  53 int main(void)
  54 {
  55         return test_harness(group_constraint_repeat, "group_constraint_repeat");
  56 }