cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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counts.c (1523B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include <errno.h>
      3#include <stdlib.h>
      4#include <string.h>
      5#include "evsel.h"
      6#include "counts.h"
      7#include <perf/threadmap.h>
      8#include <linux/zalloc.h>
      9
     10struct perf_counts *perf_counts__new(int ncpus, int nthreads)
     11{
     12	struct perf_counts *counts = zalloc(sizeof(*counts));
     13
     14	if (counts) {
     15		struct xyarray *values;
     16
     17		values = xyarray__new(ncpus, nthreads, sizeof(struct perf_counts_values));
     18		if (!values) {
     19			free(counts);
     20			return NULL;
     21		}
     22
     23		counts->values = values;
     24
     25		values = xyarray__new(ncpus, nthreads, sizeof(bool));
     26		if (!values) {
     27			xyarray__delete(counts->values);
     28			free(counts);
     29			return NULL;
     30		}
     31
     32		counts->loaded = values;
     33	}
     34
     35	return counts;
     36}
     37
     38void perf_counts__delete(struct perf_counts *counts)
     39{
     40	if (counts) {
     41		xyarray__delete(counts->loaded);
     42		xyarray__delete(counts->values);
     43		free(counts);
     44	}
     45}
     46
     47void perf_counts__reset(struct perf_counts *counts)
     48{
     49	xyarray__reset(counts->loaded);
     50	xyarray__reset(counts->values);
     51	memset(&counts->aggr, 0, sizeof(struct perf_counts_values));
     52}
     53
     54void evsel__reset_counts(struct evsel *evsel)
     55{
     56	perf_counts__reset(evsel->counts);
     57}
     58
     59int evsel__alloc_counts(struct evsel *evsel)
     60{
     61	struct perf_cpu_map *cpus = evsel__cpus(evsel);
     62	int nthreads = perf_thread_map__nr(evsel->core.threads);
     63
     64	evsel->counts = perf_counts__new(perf_cpu_map__nr(cpus), nthreads);
     65	return evsel->counts != NULL ? 0 : -ENOMEM;
     66}
     67
     68void evsel__free_counts(struct evsel *evsel)
     69{
     70	perf_counts__delete(evsel->counts);
     71	evsel->counts = NULL;
     72}