Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / tools / power / cpupower / utils / cpupower-set.c

diff --git a/kernel/tools/power/cpupower/utils/cpupower-set.c b/kernel/tools/power/cpupower/utils/cpupower-set.c
new file mode 100644 (file)
index 0000000..573c75f
--- /dev/null
+++ b/kernel/tools/power/cpupower/utils/cpupower-set.c
@@ -0,0 +1,95 @@
+/*
+ *  (C) 2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
+ *
+ *  Licensed under the terms of the GNU GPL License version 2.
+ */
+
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <getopt.h>
+
+#include <cpufreq.h>
+#include "helpers/helpers.h"
+#include "helpers/sysfs.h"
+#include "helpers/bitmask.h"
+
+static struct option set_opts[] = {
+       { .name = "perf-bias",  .has_arg = required_argument,   .flag = NULL,   .val = '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;
+
+       union {
+               struct {
+                       int perf_bias:1;
+               };
+               int params;
+       } params;
+       int perf_bias = 0;
+       int ret = 0;
+
+       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) ||
+                   cpufreq_cpu_exists(cpu))
+                       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;
+}