81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <sys/types.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <linux/stringify.h>
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#include "header.h"
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#include "utils_header.h"
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#include "metricgroup.h"
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#include <api/fs/fs.h>
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#include <sys/auxv.h>
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static bool is_compat_mode(void)
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{
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u64 base_platform = getauxval(AT_BASE_PLATFORM);
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u64 platform = getauxval(AT_PLATFORM);
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if (!strcmp((char *)platform, (char *)base_platform))
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return false;
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return true;
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}
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int
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get_cpuid(char *buffer, size_t sz, struct perf_cpu cpu __maybe_unused)
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{
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unsigned long pvr;
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int nb;
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pvr = mfspr(SPRN_PVR);
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nb = scnprintf(buffer, sz, "%lu,%lu$", PVR_VER(pvr), PVR_REV(pvr));
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/* look for end marker to ensure the entire data fit */
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if (strchr(buffer, '$')) {
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buffer[nb-1] = '\0';
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return 0;
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}
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return ENOBUFS;
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}
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char *
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get_cpuid_str(struct perf_cpu cpu __maybe_unused)
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{
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char *bufp;
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unsigned long pvr;
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/*
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* IBM Power System supports compatible mode. That is
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* Nth generation platform can support previous generation
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* OS in a mode called compatibile mode. For ex. LPAR can be
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* booted in a Power9 mode when the system is a Power10.
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*
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* In the compatible mode, care must be taken when generating
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* PVR value. When read, PVR will be of the AT_BASE_PLATFORM
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* To support generic events, return 0x00ffffff as pvr when
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* booted in compat mode. Based on this pvr value, json will
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* pick events from pmu-events/arch/powerpc/compat
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*/
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if (!is_compat_mode())
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pvr = mfspr(SPRN_PVR);
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else
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pvr = 0x00ffffff;
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if (asprintf(&bufp, "0x%.8lx", pvr) < 0)
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bufp = NULL;
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return bufp;
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}
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int arch_get_runtimeparam(const struct pmu_metric *pm)
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{
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int count;
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char path[PATH_MAX] = "/devices/hv_24x7/interface/";
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strcat(path, pm->aggr_mode == PerChip ? "sockets" : "coresperchip");
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return sysfs__read_int(path, &count) < 0 ? 1 : count;
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}
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