mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2025-02-14 20:30:37 +07:00
54e32dc0f8
The cpuid string will not be same on all CPUs on heterogeneous platforms like ARM's big.LITTLE, adding provision(using pmu->cpus) to find cpuid string from associated CPUs of PMU CORE device. Also optimise arguments to function pmu_add_cpu_aliases. Signed-off-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com> Acked-by: Will Deacon <will.deacon@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Jayachandran C <jnair@caviumnetworks.com> Cc: Jonathan Cameron <jonathan.cameron@huawei.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Robert Richter <robert.richter@cavium.com> Cc: Shaokun Zhang <zhangshaokun@hisilicon.com> Link: http://lkml.kernel.org/r/20171016183222.25750-2-ganapatrao.kulkarni@cavium.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
47 lines
1003 B
C
47 lines
1003 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <sys/types.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 -1;
|
|
}
|
|
|
|
char *
|
|
get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
|
|
{
|
|
char *bufp;
|
|
|
|
if (asprintf(&bufp, "%.8lx", mfspr(SPRN_PVR)) < 0)
|
|
bufp = NULL;
|
|
|
|
return bufp;
|
|
}
|