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// 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 "utils_header.h"
#include "metricgroup.h"
#include <api/fs/fs.h>
#include <sys/auxv.h>
static bool is_compat_mode(void)
{
u64 base_platform = getauxval(AT_BASE_PLATFORM);
u64 platform = getauxval(AT_PLATFORM);
if (!strcmp((char *)platform, (char *)base_platform))
return false;
return true;
}
int
get_cpuid(char *buffer, size_t sz, struct perf_cpu cpu __maybe_unused)
{
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_cpu cpu __maybe_unused)
{
char *bufp;
unsigned long pvr;
/*
* IBM Power System supports compatible mode. That is
* Nth generation platform can support previous generation
* OS in a mode called compatibile mode. For ex. LPAR can be
* booted in a Power9 mode when the system is a Power10.
*
* In the compatible mode, care must be taken when generating
* PVR value. When read, PVR will be of the AT_BASE_PLATFORM
* To support generic events, return 0x00ffffff as pvr when
* booted in compat mode. Based on this pvr value, json will
* pick events from pmu-events/arch/powerpc/compat
*/
if (!is_compat_mode())
pvr = mfspr(SPRN_PVR);
else
pvr = 0x00ffffff;
if (asprintf(&bufp, "0x%.8lx", pvr) < 0)
bufp = NULL;
return bufp;
}
int arch_get_runtimeparam(const struct pmu_metric *pm)
{
int count;
char path[PATH_MAX] = "/devices/hv_24x7/interface/";
strcat(path, pm->aggr_mode == PerChip ? "sockets" : "coresperchip");
return sysfs__read_int(path, &count) < 0 ? 1 : count;
}
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