1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2022, Kajol Jain, IBM Corp.
4 */
5
6 #include <stdio.h>
7 #include <stdlib.h>
8
9 #include "../event.h"
10 #include "misc.h"
11 #include "utils.h"
12
13 extern void thirty_two_instruction_loop_with_ll_sc(u64 loops, u64 *ll_sc_target);
14
15 /* The data cache was reloaded from local core's L3 due to a demand load */
16 #define EventCode 0x1340000001c040
17
18 /*
19 * A perf sampling test for mmcr3
20 * fields.
21 */
mmcr3_src(void)22 static int mmcr3_src(void)
23 {
24 struct event event;
25 u64 *intr_regs;
26 u64 dummy;
27
28 /* Check for platform support for the test */
29 SKIP_IF(check_pvr_for_sampling_tests());
30 SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
31
32 /* Init the event for the sampling test */
33 event_init_sampling(&event, EventCode);
34 event.attr.sample_regs_intr = platform_extended_mask;
35 FAIL_IF(event_open(&event));
36 event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);
37
38 FAIL_IF(event_enable(&event));
39
40 /* workload to make event overflow */
41 thirty_two_instruction_loop_with_ll_sc(1000000, &dummy);
42
43 FAIL_IF(event_disable(&event));
44
45 /* Check for sample count */
46 FAIL_IF(!collect_samples(event.mmap_buffer));
47
48 intr_regs = get_intr_regs(&event, event.mmap_buffer);
49
50 /* Check for intr_regs */
51 FAIL_IF(!intr_regs);
52
53 /*
54 * Verify that src field of MMCR3 match with
55 * corresponding event code field
56 */
57 FAIL_IF(EV_CODE_EXTRACT(event.attr.config, mmcr3_src) !=
58 get_mmcr3_src(get_reg_value(intr_regs, "MMCR3"), 1));
59
60 event_close(&event);
61 return 0;
62 }
63
main(void)64 int main(void)
65 {
66 return test_harness(mmcr3_src, "mmcr3_src");
67 }
68