39fcfb911c
EBB (Event Based Branches) are currently only available on POWER8, so we should skip them on other CPUs. I've found that at least one test loops forever on 970MP (cycles_with_freeze_test). Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> [mpe: Minor change log editing, add skip to cpu_event_vs_ebb_test] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
64 lines
1.1 KiB
C
64 lines
1.1 KiB
C
/*
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* Copyright 2014, Michael Ellerman, IBM Corp.
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* Licensed under GPLv2.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <setjmp.h>
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#include <signal.h>
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#include "ebb.h"
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/* Test that things work sanely if we have no handler */
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static int no_handler_test(void)
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{
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struct event event;
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u64 val;
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int i;
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SKIP_IF(!ebb_is_supported());
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event_init_named(&event, 0x1001e, "cycles");
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event_leader_ebb_init(&event);
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event.attr.exclude_kernel = 1;
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event.attr.exclude_hv = 1;
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event.attr.exclude_idle = 1;
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FAIL_IF(event_open(&event));
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FAIL_IF(ebb_event_enable(&event));
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val = mfspr(SPRN_EBBHR);
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FAIL_IF(val != 0);
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/* Make sure it overflows quickly */
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sample_period = 1000;
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mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
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/* Spin to make sure the event has time to overflow */
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for (i = 0; i < 1000; i++)
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mb();
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dump_ebb_state();
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/* We expect to see the PMU frozen & PMAO set */
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val = mfspr(SPRN_MMCR0);
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FAIL_IF(val != 0x0000000080000080);
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event_close(&event);
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dump_ebb_state();
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/* The real test is that we never took an EBB at 0x0 */
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return 0;
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}
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int main(void)
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{
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return test_harness(no_handler_test,"no_handler_test");
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}
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