1*9ee241f1SMadhavan Srinivasan // SPDX-License-Identifier: GPL-2.0-only
2*9ee241f1SMadhavan Srinivasan /*
3*9ee241f1SMadhavan Srinivasan * Copyright 2022, Madhavan Srinivasan, IBM Corp.
4*9ee241f1SMadhavan Srinivasan */
5*9ee241f1SMadhavan Srinivasan
6*9ee241f1SMadhavan Srinivasan #include <signal.h>
7*9ee241f1SMadhavan Srinivasan #include <stdio.h>
8*9ee241f1SMadhavan Srinivasan #include <stdlib.h>
9*9ee241f1SMadhavan Srinivasan #include <sys/types.h>
10*9ee241f1SMadhavan Srinivasan
11*9ee241f1SMadhavan Srinivasan #include "../event.h"
12*9ee241f1SMadhavan Srinivasan #include "misc.h"
13*9ee241f1SMadhavan Srinivasan #include "utils.h"
14*9ee241f1SMadhavan Srinivasan
15*9ee241f1SMadhavan Srinivasan extern void thirty_two_instruction_loop(int loops);
16*9ee241f1SMadhavan Srinivasan
17*9ee241f1SMadhavan Srinivasan static bool is_hv;
18*9ee241f1SMadhavan Srinivasan
sig_usr2_handler(int signum,siginfo_t * info,void * data)19*9ee241f1SMadhavan Srinivasan static void sig_usr2_handler(int signum, siginfo_t *info, void *data)
20*9ee241f1SMadhavan Srinivasan {
21*9ee241f1SMadhavan Srinivasan ucontext_t *uctx = data;
22*9ee241f1SMadhavan Srinivasan
23*9ee241f1SMadhavan Srinivasan is_hv = !!(uctx->uc_mcontext.gp_regs[PT_MSR] & MSR_HV);
24*9ee241f1SMadhavan Srinivasan }
25*9ee241f1SMadhavan Srinivasan
26*9ee241f1SMadhavan Srinivasan /*
27*9ee241f1SMadhavan Srinivasan * A perf sampling test for mmcr2
28*9ee241f1SMadhavan Srinivasan * fields : fcs, fch.
29*9ee241f1SMadhavan Srinivasan */
mmcr2_fcs_fch(void)30*9ee241f1SMadhavan Srinivasan static int mmcr2_fcs_fch(void)
31*9ee241f1SMadhavan Srinivasan {
32*9ee241f1SMadhavan Srinivasan struct sigaction sigact = {
33*9ee241f1SMadhavan Srinivasan .sa_sigaction = sig_usr2_handler,
34*9ee241f1SMadhavan Srinivasan .sa_flags = SA_SIGINFO
35*9ee241f1SMadhavan Srinivasan };
36*9ee241f1SMadhavan Srinivasan struct event event;
37*9ee241f1SMadhavan Srinivasan u64 *intr_regs;
38*9ee241f1SMadhavan Srinivasan
39*9ee241f1SMadhavan Srinivasan FAIL_IF(sigaction(SIGUSR2, &sigact, NULL));
40*9ee241f1SMadhavan Srinivasan FAIL_IF(kill(getpid(), SIGUSR2));
41*9ee241f1SMadhavan Srinivasan
42*9ee241f1SMadhavan Srinivasan /* Check for platform support for the test */
43*9ee241f1SMadhavan Srinivasan SKIP_IF(check_pvr_for_sampling_tests());
44*9ee241f1SMadhavan Srinivasan
45*9ee241f1SMadhavan Srinivasan /* Init the event for the sampling test */
46*9ee241f1SMadhavan Srinivasan event_init_sampling(&event, 0x1001e);
47*9ee241f1SMadhavan Srinivasan event.attr.sample_regs_intr = platform_extended_mask;
48*9ee241f1SMadhavan Srinivasan event.attr.exclude_kernel = 1;
49*9ee241f1SMadhavan Srinivasan FAIL_IF(event_open(&event));
50*9ee241f1SMadhavan Srinivasan event.mmap_buffer = event_sample_buf_mmap(event.fd, 1);
51*9ee241f1SMadhavan Srinivasan
52*9ee241f1SMadhavan Srinivasan FAIL_IF(event_enable(&event));
53*9ee241f1SMadhavan Srinivasan
54*9ee241f1SMadhavan Srinivasan /* workload to make the event overflow */
55*9ee241f1SMadhavan Srinivasan thirty_two_instruction_loop(10000);
56*9ee241f1SMadhavan Srinivasan
57*9ee241f1SMadhavan Srinivasan FAIL_IF(event_disable(&event));
58*9ee241f1SMadhavan Srinivasan
59*9ee241f1SMadhavan Srinivasan /* Check for sample count */
60*9ee241f1SMadhavan Srinivasan FAIL_IF(!collect_samples(event.mmap_buffer));
61*9ee241f1SMadhavan Srinivasan
62*9ee241f1SMadhavan Srinivasan intr_regs = get_intr_regs(&event, event.mmap_buffer);
63*9ee241f1SMadhavan Srinivasan
64*9ee241f1SMadhavan Srinivasan /* Check for intr_regs */
65*9ee241f1SMadhavan Srinivasan FAIL_IF(!intr_regs);
66*9ee241f1SMadhavan Srinivasan
67*9ee241f1SMadhavan Srinivasan /*
68*9ee241f1SMadhavan Srinivasan * Verify that fcs and fch field of MMCR2 match
69*9ee241f1SMadhavan Srinivasan * with corresponding modifier fields.
70*9ee241f1SMadhavan Srinivasan */
71*9ee241f1SMadhavan Srinivasan if (is_hv)
72*9ee241f1SMadhavan Srinivasan FAIL_IF(event.attr.exclude_kernel !=
73*9ee241f1SMadhavan Srinivasan get_mmcr2_fch(get_reg_value(intr_regs, "MMCR2"), 1));
74*9ee241f1SMadhavan Srinivasan else
75*9ee241f1SMadhavan Srinivasan FAIL_IF(event.attr.exclude_kernel !=
76*9ee241f1SMadhavan Srinivasan get_mmcr2_fcs(get_reg_value(intr_regs, "MMCR2"), 1));
77*9ee241f1SMadhavan Srinivasan
78*9ee241f1SMadhavan Srinivasan event_close(&event);
79*9ee241f1SMadhavan Srinivasan return 0;
80*9ee241f1SMadhavan Srinivasan }
81*9ee241f1SMadhavan Srinivasan
main(void)82*9ee241f1SMadhavan Srinivasan int main(void)
83*9ee241f1SMadhavan Srinivasan {
84*9ee241f1SMadhavan Srinivasan return test_harness(mmcr2_fcs_fch, "mmcr2_fcs_fch");
85*9ee241f1SMadhavan Srinivasan }
86