[linux-block.git] / tools / perf / arch / powerpc / util / header.c

// 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)
{
	unsigned long base_platform = getauxval(AT_BASE_PLATFORM);
	unsigned long 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;
}
Commit	Line	Data
	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	#include <sys/auxv.h>
	14
	15	static bool is_compat_mode(void)
	16	{
	17	unsigned long base_platform = getauxval(AT_BASE_PLATFORM);
	18	unsigned long platform = getauxval(AT_PLATFORM);
	19
	20	if (!strcmp((char )platform, (char )base_platform))
	21	return false;
	22
	23	return true;
	24	}
	25
	26	int
	27	get_cpuid(char *buffer, size_t sz, struct perf_cpu cpu __maybe_unused)
	28	{
	29	unsigned long pvr;
	30	int nb;
	31
	32	pvr = mfspr(SPRN_PVR);
	33
	34	nb = scnprintf(buffer, sz, "%lu,%lu$", PVR_VER(pvr), PVR_REV(pvr));
	35
	36	/* look for end marker to ensure the entire data fit */
	37	if (strchr(buffer, '$')) {
	38	buffer[nb-1] = '\0';
	39	return 0;
	40	}
	41	return ENOBUFS;
	42	}
	43
	44	char *
	45	get_cpuid_str(struct perf_cpu cpu __maybe_unused)
	46	{
	47	char *bufp;
	48	unsigned long pvr;
	49
	50	/*
	51	* IBM Power System supports compatible mode. That is
	52	* Nth generation platform can support previous generation
	53	* OS in a mode called compatibile mode. For ex. LPAR can be
	54	* booted in a Power9 mode when the system is a Power10.
	55	*
	56	* In the compatible mode, care must be taken when generating
	57	* PVR value. When read, PVR will be of the AT_BASE_PLATFORM
	58	* To support generic events, return 0x00ffffff as pvr when
	59	* booted in compat mode. Based on this pvr value, json will
	60	* pick events from pmu-events/arch/powerpc/compat
	61	*/
	62	if (!is_compat_mode())
	63	pvr = mfspr(SPRN_PVR);
	64	else
	65	pvr = 0x00ffffff;
	66
	67	if (asprintf(&bufp, "0x%.8lx", pvr) < 0)
	68	bufp = NULL;
	69
	70	return bufp;
	71	}
	72
	73	int arch_get_runtimeparam(const struct pmu_metric *pm)
	74	{
	75	int count;
	76	char path[PATH_MAX] = "/devices/hv_24x7/interface/";
	77
	78	strcat(path, pm->aggr_mode == PerChip ? "sockets" : "coresperchip");
	79	return sysfs__read_int(path, &count) < 0 ? 1 : count;
	80	}