2 * Copyright 2014, Michael Ellerman, IBM Corp.
3 * Licensed under GPLv2.
10 #include <sys/types.h>
18 * Tests a cpu event vs an EBB - in that order. The EBB should force the cpu
22 static int setup_cpu_event(struct event
*event
, int cpu
)
24 event_init_named(event
, 0x400FA, "PM_RUN_INST_CMPL");
26 event
->attr
.exclude_kernel
= 1;
27 event
->attr
.exclude_hv
= 1;
28 event
->attr
.exclude_idle
= 1;
30 SKIP_IF(require_paranoia_below(1));
31 FAIL_IF(event_open_with_cpu(event
, cpu
));
32 FAIL_IF(event_enable(event
));
37 int cpu_event_vs_ebb(void)
39 union pipe read_pipe
, write_pipe
;
44 SKIP_IF(!ebb_is_supported());
46 cpu
= pick_online_cpu();
48 FAIL_IF(bind_to_cpu(cpu
));
50 FAIL_IF(pipe(read_pipe
.fds
) == -1);
51 FAIL_IF(pipe(write_pipe
.fds
) == -1);
55 /* NB order of pipes looks reversed */
56 exit(ebb_child(write_pipe
, read_pipe
));
59 /* We setup the cpu event first */
60 rc
= setup_cpu_event(&event
, cpu
);
62 kill_child_and_wait(pid
);
66 /* Signal the child to install its EBB event and wait */
67 if (sync_with_child(read_pipe
, write_pipe
))
68 /* If it fails, wait for it to exit */
71 /* Signal the child to run */
72 FAIL_IF(sync_with_child(read_pipe
, write_pipe
));
75 /* We expect the child to succeed */
76 FAIL_IF(wait_for_child(pid
));
78 FAIL_IF(event_disable(&event
));
79 FAIL_IF(event_read(&event
));
83 /* The cpu event may have run */
90 return test_harness(cpu_event_vs_ebb
, "cpu_event_vs_ebb");
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