Thomas Richter | 93115d3 | 2019-01-17 10:37:17 -0300 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * Copyright IBM Corp. 2019 |
| 4 | * Author(s): Thomas Richter <tmricht@linux.ibm.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License (version 2 only) |
| 8 | * as published by the Free Software Foundation. |
| 9 | * |
| 10 | * Architecture specific trace_event function. Save event's bc000 raw data |
| 11 | * to file. File name is aux.ctr.## where ## stands for the CPU number the |
| 12 | * sample was taken from. |
| 13 | */ |
| 14 | |
| 15 | #include <unistd.h> |
| 16 | #include <stdio.h> |
| 17 | #include <string.h> |
| 18 | #include <inttypes.h> |
| 19 | |
| 20 | #include <sys/stat.h> |
| 21 | #include <linux/compiler.h> |
| 22 | #include <asm/byteorder.h> |
| 23 | |
| 24 | #include "debug.h" |
Thomas Richter | 93115d3 | 2019-01-17 10:37:17 -0300 | [diff] [blame] | 25 | #include "session.h" |
| 26 | #include "evlist.h" |
Thomas Richter | 93115d3 | 2019-01-17 10:37:17 -0300 | [diff] [blame] | 27 | #include "color.h" |
| 28 | #include "sample-raw.h" |
| 29 | #include "s390-cpumcf-kernel.h" |
Thomas Richter | 3e4a1c5 | 2019-01-17 10:30:02 +0100 | [diff] [blame] | 30 | #include "pmu-events/pmu-events.h" |
Thomas Richter | 93115d3 | 2019-01-17 10:37:17 -0300 | [diff] [blame] | 31 | |
| 32 | static size_t ctrset_size(struct cf_ctrset_entry *set) |
| 33 | { |
| 34 | return sizeof(*set) + set->ctr * sizeof(u64); |
| 35 | } |
| 36 | |
| 37 | static bool ctrset_valid(struct cf_ctrset_entry *set) |
| 38 | { |
| 39 | return set->def == S390_CPUMCF_DIAG_DEF; |
| 40 | } |
| 41 | |
| 42 | /* CPU Measurement Counter Facility raw data is a byte stream. It is 8 byte |
| 43 | * aligned and might have trailing padding bytes. |
| 44 | * Display the raw data on screen. |
| 45 | */ |
| 46 | static bool s390_cpumcfdg_testctr(struct perf_sample *sample) |
| 47 | { |
| 48 | size_t len = sample->raw_size, offset = 0; |
| 49 | unsigned char *buf = sample->raw_data; |
| 50 | struct cf_trailer_entry *te; |
| 51 | struct cf_ctrset_entry *cep, ce; |
| 52 | |
| 53 | if (!len) |
| 54 | return false; |
| 55 | while (offset < len) { |
| 56 | cep = (struct cf_ctrset_entry *)(buf + offset); |
| 57 | ce.def = be16_to_cpu(cep->def); |
| 58 | ce.set = be16_to_cpu(cep->set); |
| 59 | ce.ctr = be16_to_cpu(cep->ctr); |
| 60 | ce.res1 = be16_to_cpu(cep->res1); |
| 61 | |
| 62 | if (!ctrset_valid(&ce) || offset + ctrset_size(&ce) > len) { |
| 63 | /* Raw data for counter sets are always multiple of 8 |
| 64 | * bytes. Prepending a 4 bytes size field to the |
| 65 | * raw data block in the sample causes the perf tool |
| 66 | * to append 4 padding bytes to make the raw data part |
| 67 | * of the sample a multiple of eight bytes again. |
| 68 | * |
| 69 | * If the last entry (trailer) is 4 bytes off the raw |
| 70 | * area data end, all is good. |
| 71 | */ |
| 72 | if (len - offset - sizeof(*te) == 4) |
| 73 | break; |
| 74 | pr_err("Invalid counter set entry at %zd\n", offset); |
| 75 | return false; |
| 76 | } |
| 77 | offset += ctrset_size(&ce); |
| 78 | } |
| 79 | return true; |
| 80 | } |
| 81 | |
| 82 | /* Dump event bc000 on screen, already tested on correctness. */ |
| 83 | static void s390_cpumcfdg_dumptrail(const char *color, size_t offset, |
| 84 | struct cf_trailer_entry *tep) |
| 85 | { |
| 86 | struct cf_trailer_entry te; |
| 87 | |
| 88 | te.flags = be64_to_cpu(tep->flags); |
| 89 | te.cfvn = be16_to_cpu(tep->cfvn); |
| 90 | te.csvn = be16_to_cpu(tep->csvn); |
| 91 | te.cpu_speed = be32_to_cpu(tep->cpu_speed); |
| 92 | te.timestamp = be64_to_cpu(tep->timestamp); |
| 93 | te.progusage1 = be64_to_cpu(tep->progusage1); |
| 94 | te.progusage2 = be64_to_cpu(tep->progusage2); |
| 95 | te.progusage3 = be64_to_cpu(tep->progusage3); |
| 96 | te.tod_base = be64_to_cpu(tep->tod_base); |
| 97 | te.mach_type = be16_to_cpu(tep->mach_type); |
| 98 | te.res1 = be16_to_cpu(tep->res1); |
| 99 | te.res2 = be32_to_cpu(tep->res2); |
| 100 | |
| 101 | color_fprintf(stdout, color, " [%#08zx] Trailer:%c%c%c%c%c" |
| 102 | " Cfvn:%d Csvn:%d Speed:%d TOD:%#llx\n", |
| 103 | offset, te.clock_base ? 'T' : ' ', |
| 104 | te.speed ? 'S' : ' ', te.mtda ? 'M' : ' ', |
| 105 | te.caca ? 'C' : ' ', te.lcda ? 'L' : ' ', |
| 106 | te.cfvn, te.csvn, te.cpu_speed, te.timestamp); |
| 107 | color_fprintf(stdout, color, "\t\t1:%lx 2:%lx 3:%lx TOD-Base:%#llx" |
| 108 | " Type:%x\n\n", |
| 109 | te.progusage1, te.progusage2, te.progusage3, |
| 110 | te.tod_base, te.mach_type); |
| 111 | } |
| 112 | |
Thomas Richter | 3e4a1c5 | 2019-01-17 10:30:02 +0100 | [diff] [blame] | 113 | /* Return starting number of a counter set */ |
| 114 | static int get_counterset_start(int setnr) |
| 115 | { |
| 116 | switch (setnr) { |
| 117 | case CPUMF_CTR_SET_BASIC: /* Basic counter set */ |
| 118 | return 0; |
| 119 | case CPUMF_CTR_SET_USER: /* Problem state counter set */ |
| 120 | return 32; |
| 121 | case CPUMF_CTR_SET_CRYPTO: /* Crypto counter set */ |
| 122 | return 64; |
| 123 | case CPUMF_CTR_SET_EXT: /* Extended counter set */ |
| 124 | return 128; |
| 125 | case CPUMF_CTR_SET_MT_DIAG: /* Diagnostic counter set */ |
| 126 | return 448; |
| 127 | default: |
| 128 | return -1; |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | /* Scan the PMU table and extract the logical name of a counter from the |
| 133 | * PMU events table. Input is the counter set and counter number with in the |
| 134 | * set. Construct the event number and use this as key. If they match return |
| 135 | * the name of this counter. |
| 136 | * If no match is found a NULL pointer is returned. |
| 137 | */ |
| 138 | static const char *get_counter_name(int set, int nr, struct pmu_events_map *map) |
| 139 | { |
| 140 | int rc, event_nr, wanted = get_counterset_start(set) + nr; |
| 141 | |
| 142 | if (map) { |
| 143 | struct pmu_event *evp = map->table; |
| 144 | |
| 145 | for (; evp->name || evp->event || evp->desc; ++evp) { |
| 146 | if (evp->name == NULL || evp->event == NULL) |
| 147 | continue; |
| 148 | rc = sscanf(evp->event, "event=%x", &event_nr); |
| 149 | if (rc == 1 && event_nr == wanted) |
| 150 | return evp->name; |
| 151 | } |
| 152 | } |
| 153 | return NULL; |
| 154 | } |
| 155 | |
Thomas Richter | 93115d3 | 2019-01-17 10:37:17 -0300 | [diff] [blame] | 156 | static void s390_cpumcfdg_dump(struct perf_sample *sample) |
| 157 | { |
| 158 | size_t i, len = sample->raw_size, offset = 0; |
| 159 | unsigned char *buf = sample->raw_data; |
| 160 | const char *color = PERF_COLOR_BLUE; |
| 161 | struct cf_ctrset_entry *cep, ce; |
Thomas Richter | 3e4a1c5 | 2019-01-17 10:30:02 +0100 | [diff] [blame] | 162 | struct pmu_events_map *map; |
| 163 | struct perf_pmu pmu; |
Thomas Richter | 93115d3 | 2019-01-17 10:37:17 -0300 | [diff] [blame] | 164 | u64 *p; |
| 165 | |
Thomas Richter | 3e4a1c5 | 2019-01-17 10:30:02 +0100 | [diff] [blame] | 166 | memset(&pmu, 0, sizeof(pmu)); |
| 167 | map = perf_pmu__find_map(&pmu); |
Thomas Richter | 93115d3 | 2019-01-17 10:37:17 -0300 | [diff] [blame] | 168 | while (offset < len) { |
| 169 | cep = (struct cf_ctrset_entry *)(buf + offset); |
| 170 | |
| 171 | ce.def = be16_to_cpu(cep->def); |
| 172 | ce.set = be16_to_cpu(cep->set); |
| 173 | ce.ctr = be16_to_cpu(cep->ctr); |
| 174 | ce.res1 = be16_to_cpu(cep->res1); |
| 175 | |
| 176 | if (!ctrset_valid(&ce)) { /* Print trailer */ |
| 177 | s390_cpumcfdg_dumptrail(color, offset, |
| 178 | (struct cf_trailer_entry *)cep); |
| 179 | return; |
| 180 | } |
| 181 | |
| 182 | color_fprintf(stdout, color, " [%#08zx] Counterset:%d" |
| 183 | " Counters:%d\n", offset, ce.set, ce.ctr); |
Thomas Richter | 3e4a1c5 | 2019-01-17 10:30:02 +0100 | [diff] [blame] | 184 | for (i = 0, p = (u64 *)(cep + 1); i < ce.ctr; ++i, ++p) { |
| 185 | const char *ev_name = get_counter_name(ce.set, i, map); |
| 186 | |
Thomas Richter | 93115d3 | 2019-01-17 10:37:17 -0300 | [diff] [blame] | 187 | color_fprintf(stdout, color, |
Thomas Richter | 3e4a1c5 | 2019-01-17 10:30:02 +0100 | [diff] [blame] | 188 | "\tCounter:%03d %s Value:%#018lx\n", i, |
| 189 | ev_name ?: "<unknown>", be64_to_cpu(*p)); |
| 190 | } |
Thomas Richter | 93115d3 | 2019-01-17 10:37:17 -0300 | [diff] [blame] | 191 | offset += ctrset_size(&ce); |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | /* S390 specific trace event function. Check for PERF_RECORD_SAMPLE events |
| 196 | * and if the event was triggered by a counter set diagnostic event display |
| 197 | * its raw data. |
| 198 | * The function is only invoked when the dump flag -D is set. |
| 199 | */ |
Jiri Olsa | 63503db | 2019-07-21 13:23:52 +0200 | [diff] [blame] | 200 | void perf_evlist__s390_sample_raw(struct evlist *evlist, union perf_event *event, |
Thomas Richter | 93115d3 | 2019-01-17 10:37:17 -0300 | [diff] [blame] | 201 | struct perf_sample *sample) |
| 202 | { |
Jiri Olsa | 32dcd02 | 2019-07-21 13:23:51 +0200 | [diff] [blame] | 203 | struct evsel *ev_bc000; |
Thomas Richter | 93115d3 | 2019-01-17 10:37:17 -0300 | [diff] [blame] | 204 | |
| 205 | if (event->header.type != PERF_RECORD_SAMPLE) |
| 206 | return; |
| 207 | |
| 208 | ev_bc000 = perf_evlist__event2evsel(evlist, event); |
| 209 | if (ev_bc000 == NULL || |
Jiri Olsa | 1fc632c | 2019-07-21 13:24:29 +0200 | [diff] [blame] | 210 | ev_bc000->core.attr.config != PERF_EVENT_CPUM_CF_DIAG) |
Thomas Richter | 93115d3 | 2019-01-17 10:37:17 -0300 | [diff] [blame] | 211 | return; |
| 212 | |
| 213 | /* Display raw data on screen */ |
| 214 | if (!s390_cpumcfdg_testctr(sample)) { |
| 215 | pr_err("Invalid counter set data encountered\n"); |
| 216 | return; |
| 217 | } |
| 218 | s390_cpumcfdg_dump(sample); |
| 219 | } |