Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / tools / perf / util / s390-sample-raw.c
blobcfcf8d534d767052d9da236156c1814f5d2d2a27
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright IBM Corp. 2019
4 * Author(s): Thomas Richter <tmricht@linux.ibm.com>
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.
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.
15 #include <unistd.h>
16 #include <stdio.h>
17 #include <string.h>
18 #include <inttypes.h>
20 #include <sys/stat.h>
21 #include <linux/compiler.h>
22 #include <asm/byteorder.h>
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"
32 static size_t ctrset_size(struct cf_ctrset_entry *set)
34 return sizeof(*set) + set->ctr * sizeof(u64);
37 static bool ctrset_valid(struct cf_ctrset_entry *set)
39 return set->def == S390_CPUMCF_DIAG_DEF;
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.
46 static bool s390_cpumcfdg_testctr(struct perf_sample *sample)
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;
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);
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.
69 * If the last entry (trailer) is 4 bytes off the raw
70 * area data end, all is good.
72 if (len - offset - sizeof(*te) == 4)
73 break;
74 pr_err("Invalid counter set entry at %zd\n", offset);
75 return false;
77 offset += ctrset_size(&ce);
79 return true;
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)
86 struct cf_trailer_entry te;
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);
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);
113 /* Return starting number of a counter set */
114 static int get_counterset_start(int setnr)
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;
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.
138 static const char *get_counter_name(int set, int nr, struct pmu_events_map *map)
140 int rc, event_nr, wanted = get_counterset_start(set) + nr;
142 if (map) {
143 struct pmu_event *evp = map->table;
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;
153 return NULL;
156 static void s390_cpumcfdg_dump(struct perf_sample *sample)
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;
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);
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);
176 if (!ctrset_valid(&ce)) { /* Print trailer */
177 s390_cpumcfdg_dumptrail(color, offset,
178 (struct cf_trailer_entry *)cep);
179 return;
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);
187 color_fprintf(stdout, color,
188 "\tCounter:%03d %s Value:%#018lx\n", i,
189 ev_name ?: "<unknown>", be64_to_cpu(*p));
191 offset += ctrset_size(&ce);
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.
200 void evlist__s390_sample_raw(struct evlist *evlist, union perf_event *event, struct perf_sample *sample)
202 struct evsel *ev_bc000;
204 if (event->header.type != PERF_RECORD_SAMPLE)
205 return;
207 ev_bc000 = evlist__event2evsel(evlist, event);
208 if (ev_bc000 == NULL ||
209 ev_bc000->core.attr.config != PERF_EVENT_CPUM_CF_DIAG)
210 return;
212 /* Display raw data on screen */
213 if (!s390_cpumcfdg_testctr(sample)) {
214 pr_err("Invalid counter set data encountered\n");
215 return;
217 s390_cpumcfdg_dump(sample);