powerpc/util/header.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 #include <sys/types.h>
0003 #include <errno.h>
0004 #include <unistd.h>
0005 #include <stdio.h>
0006 #include <stdlib.h>
0007 #include <string.h>
0008 #include <linux/stringify.h>
0009 #include "header.h"
0010 #include "utils_header.h"
0011 #include "metricgroup.h"
0012 #include <api/fs/fs.h>
0013
0014 int
0015 get_cpuid(char *buffer, size_t sz)
0016 {
0017     unsigned long pvr;
0018     int nb;
0019
0020     pvr = mfspr(SPRN_PVR);
0021
0022     nb = scnprintf(buffer, sz, "%lu,%lu$", PVR_VER(pvr), PVR_REV(pvr));
0023
0024     /* look for end marker to ensure the entire data fit */
0025     if (strchr(buffer, '$')) {
0026         buffer[nb-1] = '\0';
0027         return 0;
0028     }
0029     return ENOBUFS;
0030 }
0031
0032 char *
0033 get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
0034 {
0035     char *bufp;
0036
0037     if (asprintf(&bufp, "%.8lx", mfspr(SPRN_PVR)) < 0)
0038         bufp = NULL;
0039
0040     return bufp;
0041 }
0042
0043 int arch_get_runtimeparam(const struct pmu_event *pe)
0044 {
0045     int count;
0046     char path[PATH_MAX] = "/devices/hv_24x7/interface/";
0047
0048     atoi(pe->aggr_mode) == PerChip ? strcat(path, "sockets") : strcat(path, "coresperchip");
0049     return sysfs__read_int(path, &count) < 0 ? 1 : count;
0050 }