// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2022, Athira Rajeev, IBM Corp. */ #include <stdio.h> #include <stdlib.h> #include "../event.h" #include "misc.h" #include "utils.h" #define MALLOC_SIZE (0x10000 * 10) /* Ought to be enough .. */ /* The data cache was reloaded from local core's L3 due to a demand load */ #define EventCode 0x21c040 /* * A perf sampling test for mmcr1 * fields : pmcxsel, unit, cache. */ static int mmcr1_sel_unit_cache(void) { struct event event; u64 *intr_regs; char *p; int i; /* Check for platform support for the test */ SKIP_IF(check_pvr_for_sampling_tests()); p = malloc(MALLOC_SIZE); FAIL_IF(!p); /* Init the event for the sampling test */ event_init_sampling(&event, EventCode); event.attr.sample_regs_intr = platform_extended_mask; event.attr.sample_period = 1; FAIL_IF(event_open(&event)); event.mmap_buffer = event_sample_buf_mmap(event.fd, 1); event_enable(&event); /* workload to make the event overflow */ for (i = 0; i < MALLOC_SIZE; i += 0x10000) p[i] = i; event_disable(&event); /* Check for sample count */ FAIL_IF(!collect_samples(event.mmap_buffer)); intr_regs = get_intr_regs(&event, event.mmap_buffer); /* Check for intr_regs */ FAIL_IF(!intr_regs); /* * Verify that pmcxsel, unit and cache field of MMCR1 * match with corresponding event code fields */ FAIL_IF(EV_CODE_EXTRACT(event.attr.config, pmcxsel) != get_mmcr1_pmcxsel(get_reg_value(intr_regs, "MMCR1"), 1)); FAIL_IF(EV_CODE_EXTRACT(event.attr.config, unit) != get_mmcr1_unit(get_reg_value(intr_regs, "MMCR1"), 1)); FAIL_IF(EV_CODE_EXTRACT(event.attr.config, cache) != get_mmcr1_cache(get_reg_value(intr_regs, "MMCR1"), 1)); free(p); event_close(&event); return 0; } int main(void) { FAIL_IF(test_harness(mmcr1_sel_unit_cache, "mmcr1_sel_unit_cache")); }