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

header.c (1019B)

      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
     14int
     15get_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
     32char *
     33get_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
     43int arch_get_runtimeparam(const 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}