2 * Copyright 2014, Michael Ellerman, IBM Corp.
3 * Licensed under GPLv2.
10 #include <sys/types.h>
18 * Tests a pinned per-task event vs an EBB - in that order. The pinned per-task
19 * event should prevent the EBB event from being enabled.
22 static int setup_child_event(struct event *event, pid_t child_pid)
24 event_init_named(event, 0x400FA, "PM_RUN_INST_CMPL");
26 event->attr.pinned = 1;
28 event->attr.exclude_kernel = 1;
29 event->attr.exclude_hv = 1;
30 event->attr.exclude_idle = 1;
32 FAIL_IF(event_open_with_pid(event, child_pid));
33 FAIL_IF(event_enable(event));
38 int task_event_pinned_vs_ebb(void)
40 union pipe read_pipe, write_pipe;
45 SKIP_IF(!ebb_is_supported());
47 FAIL_IF(pipe(read_pipe.fds) == -1);
48 FAIL_IF(pipe(write_pipe.fds) == -1);
52 /* NB order of pipes looks reversed */
53 exit(ebb_child(write_pipe, read_pipe));
56 /* We setup the task event first */
57 rc = setup_child_event(&event, pid);
59 kill_child_and_wait(pid);
63 /* Signal the child to install its EBB event and wait */
64 if (sync_with_child(read_pipe, write_pipe))
65 /* If it fails, wait for it to exit */
68 /* Signal the child to run */
69 FAIL_IF(sync_with_child(read_pipe, write_pipe));
72 /* We expect it to fail to read the event */
73 FAIL_IF(wait_for_child(pid) != 2);
74 FAIL_IF(event_disable(&event));
75 FAIL_IF(event_read(&event));
79 FAIL_IF(event.result.value == 0);
81 * For reasons I don't understand enabled is usually just slightly
82 * lower than running. Would be good to confirm why.
84 FAIL_IF(event.result.enabled == 0);
85 FAIL_IF(event.result.running == 0);
92 return test_harness(task_event_pinned_vs_ebb, "task_event_pinned_vs_ebb");