tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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(void)
44{
45 int count;
46 return sysfs__read_int("/devices/hv_24x7/interface/sockets", &count) < 0 ? 1 : count;
47}