// SPDX-License-Identifier: GPL-2.0
|
#include <sys/types.h>
|
#include <errno.h>
|
#include <unistd.h>
|
#include <stdio.h>
|
#include <stdlib.h>
|
#include <string.h>
|
#include <linux/stringify.h>
|
#include "header.h"
|
#include "util.h"
|
|
#define mfspr(rn) ({unsigned long rval; \
|
asm volatile("mfspr %0," __stringify(rn) \
|
: "=r" (rval)); rval; })
|
|
#define SPRN_PVR 0x11F /* Processor Version Register */
|
#define PVR_VER(pvr) (((pvr) >> 16) & 0xFFFF) /* Version field */
|
#define PVR_REV(pvr) (((pvr) >> 0) & 0xFFFF) /* Revison field */
|
|
int
|
get_cpuid(char *buffer, size_t sz)
|
{
|
unsigned long pvr;
|
int nb;
|
|
pvr = mfspr(SPRN_PVR);
|
|
nb = scnprintf(buffer, sz, "%lu,%lu$", PVR_VER(pvr), PVR_REV(pvr));
|
|
/* look for end marker to ensure the entire data fit */
|
if (strchr(buffer, '$')) {
|
buffer[nb-1] = '\0';
|
return 0;
|
}
|
return ENOBUFS;
|
}
|
|
char *
|
get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
|
{
|
char *bufp;
|
|
if (asprintf(&bufp, "%.8lx", mfspr(SPRN_PVR)) < 0)
|
bufp = NULL;
|
|
return bufp;
|
}
|
