cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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multi_counter_test.c (2070B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Copyright 2014, Michael Ellerman, IBM Corp.
      4 */
      5
      6#include <stdio.h>
      7#include <stdlib.h>
      8#include <sys/ioctl.h>
      9
     10#include "ebb.h"
     11
     12
     13/*
     14 * Test counting multiple events using EBBs.
     15 */
     16int multi_counter(void)
     17{
     18	struct event events[6];
     19	int i, group_fd;
     20
     21	SKIP_IF(!ebb_is_supported());
     22
     23	event_init_named(&events[0], 0x1001C, "PM_CMPLU_STALL_THRD");
     24	event_init_named(&events[1], 0x2D016, "PM_CMPLU_STALL_FXU");
     25	event_init_named(&events[2], 0x30006, "PM_CMPLU_STALL_OTHER_CMPL");
     26	event_init_named(&events[3], 0x4000A, "PM_CMPLU_STALL");
     27	event_init_named(&events[4], 0x600f4, "PM_RUN_CYC");
     28	event_init_named(&events[5], 0x500fa, "PM_RUN_INST_CMPL");
     29
     30	event_leader_ebb_init(&events[0]);
     31	for (i = 1; i < 6; i++)
     32		event_ebb_init(&events[i]);
     33
     34	group_fd = -1;
     35	for (i = 0; i < 6; i++) {
     36		events[i].attr.exclude_kernel = 1;
     37		events[i].attr.exclude_hv = 1;
     38		events[i].attr.exclude_idle = 1;
     39
     40		FAIL_IF(event_open_with_group(&events[i], group_fd));
     41		if (group_fd == -1)
     42			group_fd = events[0].fd;
     43	}
     44
     45	ebb_enable_pmc_counting(1);
     46	ebb_enable_pmc_counting(2);
     47	ebb_enable_pmc_counting(3);
     48	ebb_enable_pmc_counting(4);
     49	ebb_enable_pmc_counting(5);
     50	ebb_enable_pmc_counting(6);
     51	setup_ebb_handler(standard_ebb_callee);
     52
     53	FAIL_IF(ioctl(events[0].fd, PERF_EVENT_IOC_ENABLE, PERF_IOC_FLAG_GROUP));
     54	FAIL_IF(event_read(&events[0]));
     55
     56	ebb_global_enable();
     57
     58	mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
     59	mtspr(SPRN_PMC2, pmc_sample_period(sample_period));
     60	mtspr(SPRN_PMC3, pmc_sample_period(sample_period));
     61	mtspr(SPRN_PMC4, pmc_sample_period(sample_period));
     62	mtspr(SPRN_PMC5, pmc_sample_period(sample_period));
     63	mtspr(SPRN_PMC6, pmc_sample_period(sample_period));
     64
     65	while (ebb_state.stats.ebb_count < 50) {
     66		FAIL_IF(core_busy_loop());
     67		FAIL_IF(ebb_check_mmcr0());
     68	}
     69
     70	ebb_global_disable();
     71	ebb_freeze_pmcs();
     72
     73	dump_ebb_state();
     74
     75	for (i = 0; i < 6; i++)
     76		event_close(&events[i]);
     77
     78	FAIL_IF(ebb_state.stats.ebb_count == 0);
     79
     80	return 0;
     81}
     82
     83int main(void)
     84{
     85	return test_harness(multi_counter, "multi_counter");
     86}