1 /* 2 * Copyright 2014, Michael Ellerman, IBM Corp. 3 * Licensed under GPLv2. 4 */ 5 6 #include <stdio.h> 7 #include <stdlib.h> 8 #include <setjmp.h> 9 #include <signal.h> 10 11 #include "ebb.h" 12 13 14 /* Test that things work sanely if we have no handler */ 15 16 static int no_handler_test(void) 17 { 18 struct event event; 19 u64 val; 20 int i; 21 22 event_init_named(&event, 0x1001e, "cycles"); 23 event_leader_ebb_init(&event); 24 25 event.attr.exclude_kernel = 1; 26 event.attr.exclude_hv = 1; 27 event.attr.exclude_idle = 1; 28 29 FAIL_IF(event_open(&event)); 30 FAIL_IF(ebb_event_enable(&event)); 31 32 val = mfspr(SPRN_EBBHR); 33 FAIL_IF(val != 0); 34 35 /* Make sure it overflows quickly */ 36 sample_period = 1000; 37 mtspr(SPRN_PMC1, pmc_sample_period(sample_period)); 38 39 /* Spin to make sure the event has time to overflow */ 40 for (i = 0; i < 1000; i++) 41 mb(); 42 43 dump_ebb_state(); 44 45 /* We expect to see the PMU frozen & PMAO set */ 46 val = mfspr(SPRN_MMCR0); 47 FAIL_IF(val != 0x0000000080000080); 48 49 event_close(&event); 50 51 dump_ebb_state(); 52 53 /* The real test is that we never took an EBB at 0x0 */ 54 55 return 0; 56 } 57 58 int main(void) 59 { 60 return test_harness(no_handler_test,"no_handler_test"); 61 } 62