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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"
25#include "session.h"
26#include "evlist.h"
27#include "color.h"
28#include "sample-raw.h"
29#include "s390-cpumcf-kernel.h"
30#include "pmu-events/pmu-events.h"
31
32static size_t ctrset_size(struct cf_ctrset_entry *set)
33{
34 return sizeof(*set) + set->ctr * sizeof(u64);
35}
36
37static 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 */
46static 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. */
83static 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
113/* Return starting number of a counter set */
114static 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 */
138static 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
156static 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;
162 struct pmu_events_map *map;
163 struct perf_pmu pmu;
164 u64 *p;
165
166 memset(&pmu, 0, sizeof(pmu));
167 map = perf_pmu__find_map(&pmu);
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);
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
187 color_fprintf(stdout, color,
188 "\tCounter:%03d %s Value:%#018lx\n", i,
189 ev_name ?: "<unknown>", be64_to_cpu(*p));
190 }
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 */
200void perf_evlist__s390_sample_raw(struct evlist *evlist, union perf_event *event,
201 struct perf_sample *sample)
202{
203 struct evsel *ev_bc000;
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 ||
210 ev_bc000->core.attr.config != PERF_EVENT_CPUM_CF_DIAG)
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}
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"
25#include "session.h"
26#include "evlist.h"
27#include "color.h"
28#include "sample-raw.h"
29#include "s390-cpumcf-kernel.h"
30#include "pmu-events/pmu-events.h"
31#include "util/sample.h"
32
33static size_t ctrset_size(struct cf_ctrset_entry *set)
34{
35 return sizeof(*set) + set->ctr * sizeof(u64);
36}
37
38static bool ctrset_valid(struct cf_ctrset_entry *set)
39{
40 return set->def == S390_CPUMCF_DIAG_DEF;
41}
42
43/* CPU Measurement Counter Facility raw data is a byte stream. It is 8 byte
44 * aligned and might have trailing padding bytes.
45 * Display the raw data on screen.
46 */
47static bool s390_cpumcfdg_testctr(struct perf_sample *sample)
48{
49 size_t len = sample->raw_size, offset = 0;
50 unsigned char *buf = sample->raw_data;
51 struct cf_trailer_entry *te;
52 struct cf_ctrset_entry *cep, ce;
53
54 if (!len)
55 return false;
56 while (offset < len) {
57 cep = (struct cf_ctrset_entry *)(buf + offset);
58 ce.def = be16_to_cpu(cep->def);
59 ce.set = be16_to_cpu(cep->set);
60 ce.ctr = be16_to_cpu(cep->ctr);
61 ce.res1 = be16_to_cpu(cep->res1);
62
63 if (!ctrset_valid(&ce) || offset + ctrset_size(&ce) > len) {
64 /* Raw data for counter sets are always multiple of 8
65 * bytes. Prepending a 4 bytes size field to the
66 * raw data block in the sample causes the perf tool
67 * to append 4 padding bytes to make the raw data part
68 * of the sample a multiple of eight bytes again.
69 *
70 * If the last entry (trailer) is 4 bytes off the raw
71 * area data end, all is good.
72 */
73 if (len - offset - sizeof(*te) == 4)
74 break;
75 pr_err("Invalid counter set entry at %zd\n", offset);
76 return false;
77 }
78 offset += ctrset_size(&ce);
79 }
80 return true;
81}
82
83/* Dump event bc000 on screen, already tested on correctness. */
84static void s390_cpumcfdg_dumptrail(const char *color, size_t offset,
85 struct cf_trailer_entry *tep)
86{
87 struct cf_trailer_entry te;
88
89 te.flags = be64_to_cpu(tep->flags);
90 te.cfvn = be16_to_cpu(tep->cfvn);
91 te.csvn = be16_to_cpu(tep->csvn);
92 te.cpu_speed = be32_to_cpu(tep->cpu_speed);
93 te.timestamp = be64_to_cpu(tep->timestamp);
94 te.progusage1 = be64_to_cpu(tep->progusage1);
95 te.progusage2 = be64_to_cpu(tep->progusage2);
96 te.progusage3 = be64_to_cpu(tep->progusage3);
97 te.tod_base = be64_to_cpu(tep->tod_base);
98 te.mach_type = be16_to_cpu(tep->mach_type);
99 te.res1 = be16_to_cpu(tep->res1);
100 te.res2 = be32_to_cpu(tep->res2);
101
102 color_fprintf(stdout, color, " [%#08zx] Trailer:%c%c%c%c%c"
103 " Cfvn:%d Csvn:%d Speed:%d TOD:%#llx\n",
104 offset, te.clock_base ? 'T' : ' ',
105 te.speed ? 'S' : ' ', te.mtda ? 'M' : ' ',
106 te.caca ? 'C' : ' ', te.lcda ? 'L' : ' ',
107 te.cfvn, te.csvn, te.cpu_speed, te.timestamp);
108 color_fprintf(stdout, color, "\t\t1:%lx 2:%lx 3:%lx TOD-Base:%#llx"
109 " Type:%x\n\n",
110 te.progusage1, te.progusage2, te.progusage3,
111 te.tod_base, te.mach_type);
112}
113
114/* Return starting number of a counter set */
115static int get_counterset_start(int setnr)
116{
117 switch (setnr) {
118 case CPUMF_CTR_SET_BASIC: /* Basic counter set */
119 return 0;
120 case CPUMF_CTR_SET_USER: /* Problem state counter set */
121 return 32;
122 case CPUMF_CTR_SET_CRYPTO: /* Crypto counter set */
123 return 64;
124 case CPUMF_CTR_SET_EXT: /* Extended counter set */
125 return 128;
126 case CPUMF_CTR_SET_MT_DIAG: /* Diagnostic counter set */
127 return 448;
128 default:
129 return -1;
130 }
131}
132
133struct get_counter_name_data {
134 int wanted;
135 const char *result;
136};
137
138static int get_counter_name_callback(const struct pmu_event *evp,
139 const struct pmu_events_table *table __maybe_unused,
140 void *vdata)
141{
142 struct get_counter_name_data *data = vdata;
143 int rc, event_nr;
144
145 if (evp->name == NULL || evp->event == NULL)
146 return 0;
147 rc = sscanf(evp->event, "event=%x", &event_nr);
148 if (rc == 1 && event_nr == data->wanted) {
149 data->result = evp->name;
150 return 1; /* Terminate the search. */
151 }
152 return 0;
153}
154
155/* Scan the PMU table and extract the logical name of a counter from the
156 * PMU events table. Input is the counter set and counter number with in the
157 * set. Construct the event number and use this as key. If they match return
158 * the name of this counter.
159 * If no match is found a NULL pointer is returned.
160 */
161static const char *get_counter_name(int set, int nr, const struct pmu_events_table *table)
162{
163 struct get_counter_name_data data = {
164 .wanted = get_counterset_start(set) + nr,
165 .result = NULL,
166 };
167
168 if (!table)
169 return NULL;
170
171 pmu_events_table_for_each_event(table, get_counter_name_callback, &data);
172 return data.result;
173}
174
175static void s390_cpumcfdg_dump(struct perf_sample *sample)
176{
177 size_t i, len = sample->raw_size, offset = 0;
178 unsigned char *buf = sample->raw_data;
179 const char *color = PERF_COLOR_BLUE;
180 struct cf_ctrset_entry *cep, ce;
181 const struct pmu_events_table *table;
182 u64 *p;
183
184 table = pmu_events_table__find();
185 while (offset < len) {
186 cep = (struct cf_ctrset_entry *)(buf + offset);
187
188 ce.def = be16_to_cpu(cep->def);
189 ce.set = be16_to_cpu(cep->set);
190 ce.ctr = be16_to_cpu(cep->ctr);
191 ce.res1 = be16_to_cpu(cep->res1);
192
193 if (!ctrset_valid(&ce)) { /* Print trailer */
194 s390_cpumcfdg_dumptrail(color, offset,
195 (struct cf_trailer_entry *)cep);
196 return;
197 }
198
199 color_fprintf(stdout, color, " [%#08zx] Counterset:%d"
200 " Counters:%d\n", offset, ce.set, ce.ctr);
201 for (i = 0, p = (u64 *)(cep + 1); i < ce.ctr; ++i, ++p) {
202 const char *ev_name = get_counter_name(ce.set, i, table);
203
204 color_fprintf(stdout, color,
205 "\tCounter:%03d %s Value:%#018lx\n", i,
206 ev_name ?: "<unknown>", be64_to_cpu(*p));
207 }
208 offset += ctrset_size(&ce);
209 }
210}
211
212/* S390 specific trace event function. Check for PERF_RECORD_SAMPLE events
213 * and if the event was triggered by a counter set diagnostic event display
214 * its raw data.
215 * The function is only invoked when the dump flag -D is set.
216 */
217void evlist__s390_sample_raw(struct evlist *evlist, union perf_event *event, struct perf_sample *sample)
218{
219 struct evsel *ev_bc000;
220
221 if (event->header.type != PERF_RECORD_SAMPLE)
222 return;
223
224 ev_bc000 = evlist__event2evsel(evlist, event);
225 if (ev_bc000 == NULL ||
226 ev_bc000->core.attr.config != PERF_EVENT_CPUM_CF_DIAG)
227 return;
228
229 /* Display raw data on screen */
230 if (!s390_cpumcfdg_testctr(sample)) {
231 pr_err("Invalid counter set data encountered\n");
232 return;
233 }
234 s390_cpumcfdg_dump(sample);
235}