invalid_event_code_test.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright 2022, Athira Rajeev, IBM Corp.
 4 */
 5
 6#include <stdio.h>
 7#include <sys/prctl.h>
 8#include <limits.h>
 9#include "../event.h"
10#include "../sampling_tests/misc.h"
11
12/* The data cache was reloaded from local core's L3 due to a demand load */
13#define EventCode_1 0x1340000001c040
14/* PM_DATA_RADIX_PROCESS_L2_PTE_FROM_L2 */
15#define EventCode_2 0x14242
16/* Event code with IFM, EBB, BHRB bits set in event code */
17#define EventCode_3 0xf00000000000001e
18
19/*
20 * Some of the bits in the event code is
21 * reserved for specific platforms.
22 * Event code bits 52-59 are reserved in power9,
23 * whereas in ISA v3.1, these are used for programming
24 * Monitor Mode Control Register 3 (MMCR3).
25 * Bit 9 in event code is reserved in power9,
26 * whereas it is used for programming "radix_scope_qual"
27 * bit 18 in Monitor Mode Control Register 1 (MMCR1).
28 *
29 * Testcase to ensure that using reserved bits in
30 * event code should cause event_open to fail.
31 */
32
33static int invalid_event_code(void)
34{
35	struct event event;
36
37	/* Check for platform support for the test */
38	SKIP_IF(platform_check_for_tests());
39
40	/*
41	 * Events using MMCR3 bits and radix scope qual bits
42	 * should fail in power9 and should succeed in power10 ( ISA v3.1 )
43	 * Init the events and check for pass/fail in event open.
44	 */
45	if (have_hwcap2(PPC_FEATURE2_ARCH_3_1)) {
46		event_init(&event, EventCode_1);
47		FAIL_IF(event_open(&event));
48		event_close(&event);
49
50		event_init(&event, EventCode_2);
51		FAIL_IF(event_open(&event));
52		event_close(&event);
53	} else {
54		event_init(&event, EventCode_1);
55		FAIL_IF(!event_open(&event));
56
57		event_init(&event, EventCode_2);
58		FAIL_IF(!event_open(&event));
59	}
60
61	return 0;
62}
63
64int main(void)
65{
66	return test_harness(invalid_event_code, "invalid_event_code");
67}