236 lines
6.8 KiB
C
236 lines
6.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright IBM Corp. 2019
|
|
* Author(s): Thomas Richter <tmricht@linux.ibm.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License (version 2 only)
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* Architecture specific trace_event function. Save event's bc000 raw data
|
|
* to file. File name is aux.ctr.## where ## stands for the CPU number the
|
|
* sample was taken from.
|
|
*/
|
|
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <inttypes.h>
|
|
|
|
#include <sys/stat.h>
|
|
#include <linux/compiler.h>
|
|
#include <asm/byteorder.h>
|
|
|
|
#include "debug.h"
|
|
#include "session.h"
|
|
#include "evlist.h"
|
|
#include "color.h"
|
|
#include "sample-raw.h"
|
|
#include "s390-cpumcf-kernel.h"
|
|
#include "pmu-events/pmu-events.h"
|
|
#include "util/sample.h"
|
|
|
|
static size_t ctrset_size(struct cf_ctrset_entry *set)
|
|
{
|
|
return sizeof(*set) + set->ctr * sizeof(u64);
|
|
}
|
|
|
|
static bool ctrset_valid(struct cf_ctrset_entry *set)
|
|
{
|
|
return set->def == S390_CPUMCF_DIAG_DEF;
|
|
}
|
|
|
|
/* CPU Measurement Counter Facility raw data is a byte stream. It is 8 byte
|
|
* aligned and might have trailing padding bytes.
|
|
* Display the raw data on screen.
|
|
*/
|
|
static bool s390_cpumcfdg_testctr(struct perf_sample *sample)
|
|
{
|
|
size_t len = sample->raw_size, offset = 0;
|
|
unsigned char *buf = sample->raw_data;
|
|
struct cf_trailer_entry *te;
|
|
struct cf_ctrset_entry *cep, ce;
|
|
|
|
if (!len)
|
|
return false;
|
|
while (offset < len) {
|
|
cep = (struct cf_ctrset_entry *)(buf + offset);
|
|
ce.def = be16_to_cpu(cep->def);
|
|
ce.set = be16_to_cpu(cep->set);
|
|
ce.ctr = be16_to_cpu(cep->ctr);
|
|
ce.res1 = be16_to_cpu(cep->res1);
|
|
|
|
if (!ctrset_valid(&ce) || offset + ctrset_size(&ce) > len) {
|
|
/* Raw data for counter sets are always multiple of 8
|
|
* bytes. Prepending a 4 bytes size field to the
|
|
* raw data block in the sample causes the perf tool
|
|
* to append 4 padding bytes to make the raw data part
|
|
* of the sample a multiple of eight bytes again.
|
|
*
|
|
* If the last entry (trailer) is 4 bytes off the raw
|
|
* area data end, all is good.
|
|
*/
|
|
if (len - offset - sizeof(*te) == 4)
|
|
break;
|
|
pr_err("Invalid counter set entry at %zd\n", offset);
|
|
return false;
|
|
}
|
|
offset += ctrset_size(&ce);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/* Dump event bc000 on screen, already tested on correctness. */
|
|
static void s390_cpumcfdg_dumptrail(const char *color, size_t offset,
|
|
struct cf_trailer_entry *tep)
|
|
{
|
|
struct cf_trailer_entry te;
|
|
|
|
te.flags = be64_to_cpu(tep->flags);
|
|
te.cfvn = be16_to_cpu(tep->cfvn);
|
|
te.csvn = be16_to_cpu(tep->csvn);
|
|
te.cpu_speed = be32_to_cpu(tep->cpu_speed);
|
|
te.timestamp = be64_to_cpu(tep->timestamp);
|
|
te.progusage1 = be64_to_cpu(tep->progusage1);
|
|
te.progusage2 = be64_to_cpu(tep->progusage2);
|
|
te.progusage3 = be64_to_cpu(tep->progusage3);
|
|
te.tod_base = be64_to_cpu(tep->tod_base);
|
|
te.mach_type = be16_to_cpu(tep->mach_type);
|
|
te.res1 = be16_to_cpu(tep->res1);
|
|
te.res2 = be32_to_cpu(tep->res2);
|
|
|
|
color_fprintf(stdout, color, " [%#08zx] Trailer:%c%c%c%c%c"
|
|
" Cfvn:%d Csvn:%d Speed:%d TOD:%#llx\n",
|
|
offset, te.clock_base ? 'T' : ' ',
|
|
te.speed ? 'S' : ' ', te.mtda ? 'M' : ' ',
|
|
te.caca ? 'C' : ' ', te.lcda ? 'L' : ' ',
|
|
te.cfvn, te.csvn, te.cpu_speed, te.timestamp);
|
|
color_fprintf(stdout, color, "\t\t1:%lx 2:%lx 3:%lx TOD-Base:%#llx"
|
|
" Type:%x\n\n",
|
|
te.progusage1, te.progusage2, te.progusage3,
|
|
te.tod_base, te.mach_type);
|
|
}
|
|
|
|
/* Return starting number of a counter set */
|
|
static int get_counterset_start(int setnr)
|
|
{
|
|
switch (setnr) {
|
|
case CPUMF_CTR_SET_BASIC: /* Basic counter set */
|
|
return 0;
|
|
case CPUMF_CTR_SET_USER: /* Problem state counter set */
|
|
return 32;
|
|
case CPUMF_CTR_SET_CRYPTO: /* Crypto counter set */
|
|
return 64;
|
|
case CPUMF_CTR_SET_EXT: /* Extended counter set */
|
|
return 128;
|
|
case CPUMF_CTR_SET_MT_DIAG: /* Diagnostic counter set */
|
|
return 448;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
struct get_counter_name_data {
|
|
int wanted;
|
|
const char *result;
|
|
};
|
|
|
|
static int get_counter_name_callback(const struct pmu_event *evp,
|
|
const struct pmu_events_table *table __maybe_unused,
|
|
void *vdata)
|
|
{
|
|
struct get_counter_name_data *data = vdata;
|
|
int rc, event_nr;
|
|
|
|
if (evp->name == NULL || evp->event == NULL)
|
|
return 0;
|
|
rc = sscanf(evp->event, "event=%x", &event_nr);
|
|
if (rc == 1 && event_nr == data->wanted) {
|
|
data->result = evp->name;
|
|
return 1; /* Terminate the search. */
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Scan the PMU table and extract the logical name of a counter from the
|
|
* PMU events table. Input is the counter set and counter number with in the
|
|
* set. Construct the event number and use this as key. If they match return
|
|
* the name of this counter.
|
|
* If no match is found a NULL pointer is returned.
|
|
*/
|
|
static const char *get_counter_name(int set, int nr, const struct pmu_events_table *table)
|
|
{
|
|
struct get_counter_name_data data = {
|
|
.wanted = get_counterset_start(set) + nr,
|
|
.result = NULL,
|
|
};
|
|
|
|
if (!table)
|
|
return NULL;
|
|
|
|
pmu_events_table_for_each_event(table, get_counter_name_callback, &data);
|
|
return data.result;
|
|
}
|
|
|
|
static void s390_cpumcfdg_dump(struct perf_sample *sample)
|
|
{
|
|
size_t i, len = sample->raw_size, offset = 0;
|
|
unsigned char *buf = sample->raw_data;
|
|
const char *color = PERF_COLOR_BLUE;
|
|
struct cf_ctrset_entry *cep, ce;
|
|
const struct pmu_events_table *table;
|
|
u64 *p;
|
|
|
|
table = pmu_events_table__find();
|
|
while (offset < len) {
|
|
cep = (struct cf_ctrset_entry *)(buf + offset);
|
|
|
|
ce.def = be16_to_cpu(cep->def);
|
|
ce.set = be16_to_cpu(cep->set);
|
|
ce.ctr = be16_to_cpu(cep->ctr);
|
|
ce.res1 = be16_to_cpu(cep->res1);
|
|
|
|
if (!ctrset_valid(&ce)) { /* Print trailer */
|
|
s390_cpumcfdg_dumptrail(color, offset,
|
|
(struct cf_trailer_entry *)cep);
|
|
return;
|
|
}
|
|
|
|
color_fprintf(stdout, color, " [%#08zx] Counterset:%d"
|
|
" Counters:%d\n", offset, ce.set, ce.ctr);
|
|
for (i = 0, p = (u64 *)(cep + 1); i < ce.ctr; ++i, ++p) {
|
|
const char *ev_name = get_counter_name(ce.set, i, table);
|
|
|
|
color_fprintf(stdout, color,
|
|
"\tCounter:%03d %s Value:%#018lx\n", i,
|
|
ev_name ?: "<unknown>", be64_to_cpu(*p));
|
|
}
|
|
offset += ctrset_size(&ce);
|
|
}
|
|
}
|
|
|
|
/* S390 specific trace event function. Check for PERF_RECORD_SAMPLE events
|
|
* and if the event was triggered by a counter set diagnostic event display
|
|
* its raw data.
|
|
* The function is only invoked when the dump flag -D is set.
|
|
*/
|
|
void evlist__s390_sample_raw(struct evlist *evlist, union perf_event *event, struct perf_sample *sample)
|
|
{
|
|
struct evsel *ev_bc000;
|
|
|
|
if (event->header.type != PERF_RECORD_SAMPLE)
|
|
return;
|
|
|
|
ev_bc000 = evlist__event2evsel(evlist, event);
|
|
if (ev_bc000 == NULL ||
|
|
ev_bc000->core.attr.config != PERF_EVENT_CPUM_CF_DIAG)
|
|
return;
|
|
|
|
/* Display raw data on screen */
|
|
if (!s390_cpumcfdg_testctr(sample)) {
|
|
pr_err("Invalid counter set data encountered\n");
|
|
return;
|
|
}
|
|
s390_cpumcfdg_dump(sample);
|
|
}
|