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// SPDX-License-Identifier: GPL-2.0-only
/*
* (C) 2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <getopt.h>
#include <sys/utsname.h>
#include "helpers/helpers.h"
#include "helpers/sysfs.h"
#include "helpers/bitmask.h"
static struct option set_opts[] = {
{"perf-bias", required_argument, NULL, 'b'},
{ },
};
static void print_wrong_arg_exit(void)
{
printf(_("invalid or unknown argument\n"));
exit(EXIT_FAILURE);
}
int cmd_set(int argc, char **argv)
{
extern char *optarg;
extern int optind, opterr, optopt;
unsigned int cpu;
struct utsname uts;
union {
struct {
int perf_bias:1;
};
int params;
} params;
int perf_bias = 0;
int ret = 0;
ret = uname(&uts);
if (!ret && (!strcmp(uts.machine, "ppc64le") ||
!strcmp(uts.machine, "ppc64"))) {
fprintf(stderr, _("Subcommand not supported on POWER.\n"));
return ret;
}
setlocale(LC_ALL, "");
textdomain(PACKAGE);
params.params = 0;
/* parameter parsing */
while ((ret = getopt_long(argc, argv, "b:",
set_opts, NULL)) != -1) {
switch (ret) {
case 'b':
if (params.perf_bias)
print_wrong_arg_exit();
perf_bias = atoi(optarg);
if (perf_bias < 0 || perf_bias > 15) {
printf(_("--perf-bias param out "
"of range [0-%d]\n"), 15);
print_wrong_arg_exit();
}
params.perf_bias = 1;
break;
default:
print_wrong_arg_exit();
}
}
if (!params.params)
print_wrong_arg_exit();
/* Default is: set all CPUs */
if (bitmask_isallclear(cpus_chosen))
bitmask_setall(cpus_chosen);
/* loop over CPUs */
for (cpu = bitmask_first(cpus_chosen);
cpu <= bitmask_last(cpus_chosen); cpu++) {
if (!bitmask_isbitset(cpus_chosen, cpu))
continue;
if (sysfs_is_cpu_online(cpu) != 1){
fprintf(stderr, _("Cannot set values on CPU %d:"), cpu);
fprintf(stderr, _(" *is offline\n"));
continue;
}
if (params.perf_bias) {
ret = msr_intel_set_perf_bias(cpu, perf_bias);
if (ret) {
fprintf(stderr, _("Error setting perf-bias "
"value on CPU %d\n"), cpu);
break;
}
}
}
return ret;
}
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