tools/perf/arch/powerpc/util/header.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <sys/types.h>
   3 #include <errno.h>
   4 #include <unistd.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <linux/stringify.h>
   9 #include "header.h"
  10 #include "utils_header.h"
  11 #include "metricgroup.h"
  12 #include <api/fs/fs.h>
  13
  14 int
  15 get_cpuid(char *buffer, size_t sz)
  16 {
  17         unsigned long pvr;
  18         int nb;
  19
  20         pvr = mfspr(SPRN_PVR);
  21
  22         nb = scnprintf(buffer, sz, "%lu,%lu$", PVR_VER(pvr), PVR_REV(pvr));
  23
  24         /* look for end marker to ensure the entire data fit */
  25         if (strchr(buffer, '$')) {
  26                 buffer[nb-1] = '\0';
  27                 return 0;
  28         }
  29         return ENOBUFS;
  30 }
  31
  32 char *
  33 get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
  34 {
  35         char *bufp;
  36
  37         if (asprintf(&bufp, "%.8lx", mfspr(SPRN_PVR)) < 0)
  38                 bufp = NULL;
  39
  40         return bufp;
  41 }
  42
  43 int arch_get_runtimeparam(struct pmu_event *pe)
  44 {
  45         int count;
  46         char path[PATH_MAX] = "/devices/hv_24x7/interface/";
  47
  48         atoi(pe->aggr_mode) == PerChip ? strcat(path, "sockets") : strcat(path, "coresperchip");
  49         return sysfs__read_int(path, &count) < 0 ? 1 : count;
  50 }