cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

evswitch.c (1466B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2// Copyright (C) 2019, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
      3
      4#include "evswitch.h"
      5#include "evlist.h"
      6
      7bool evswitch__discard(struct evswitch *evswitch, struct evsel *evsel)
      8{
      9	if (evswitch->on && evswitch->discarding) {
     10		if (evswitch->on != evsel)
     11			return true;
     12
     13		evswitch->discarding = false;
     14
     15		if (!evswitch->show_on_off_events)
     16			return true;
     17
     18		return false;
     19	}
     20
     21	if (evswitch->off && !evswitch->discarding) {
     22		if (evswitch->off != evsel)
     23			return false;
     24
     25		evswitch->discarding = true;
     26
     27		if (!evswitch->show_on_off_events)
     28			return true;
     29	}
     30
     31	return false;
     32}
     33
     34static int evswitch__fprintf_enoent(FILE *fp, const char *evtype, const char *evname)
     35{
     36	int printed = fprintf(fp, "ERROR: switch-%s event not found (%s)\n", evtype, evname);
     37
     38	return printed += fprintf(fp, "HINT:  use 'perf evlist' to see the available event names\n");
     39}
     40
     41int evswitch__init(struct evswitch *evswitch, struct evlist *evlist, FILE *fp)
     42{
     43	if (evswitch->on_name) {
     44		evswitch->on = evlist__find_evsel_by_str(evlist, evswitch->on_name);
     45		if (evswitch->on == NULL) {
     46			evswitch__fprintf_enoent(fp, "on", evswitch->on_name);
     47			return -ENOENT;
     48		}
     49		evswitch->discarding = true;
     50	}
     51
     52	if (evswitch->off_name) {
     53		evswitch->off = evlist__find_evsel_by_str(evlist, evswitch->off_name);
     54		if (evswitch->off == NULL) {
     55			evswitch__fprintf_enoent(fp, "off", evswitch->off_name);
     56			return -ENOENT;
     57		}
     58	}
     59
     60	return 0;
     61}