// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2014, Michael Ellerman, IBM Corp.
 */

#include <stdio.h>
#include <stdlib.h>
#include <setjmp.h>
#include <signal.h>

#include "ebb.h"


/* Test that things work sanely if we have no handler */

static int no_handler_test(void)
{
        struct event event;
        u64 val;
        int i;

        SKIP_IF(!ebb_is_supported());

        event_init_named(&event, 0x1001e, "cycles");
        event_leader_ebb_init(&event);

        event.attr.exclude_kernel = 1;
        event.attr.exclude_hv = 1;
        event.attr.exclude_idle = 1;

        FAIL_IF(event_open(&event));
        FAIL_IF(ebb_event_enable(&event));

        val = mfspr(SPRN_EBBHR);
        FAIL_IF(val != 0);

        /* Make sure it overflows quickly */
        sample_period = 1000;
        mtspr(SPRN_PMC1, pmc_sample_period(sample_period));

        /* Spin to make sure the event has time to overflow */
        for (i = 0; i < 1000; i++)
                mb();

        dump_ebb_state();

        /* We expect to see the PMU frozen & PMAO set */
        val = mfspr(SPRN_MMCR0);
        FAIL_IF(val != 0x0000000080000080);

        event_close(&event);

        /* The real test is that we never took an EBB at 0x0 */

        return 0;
}

int main(void)
{
        return test_harness(no_handler_test,"no_handler_test");
}