1 files changed, 99 insertions, 0 deletions
diff --git a/tools/power/cpupower/utils/cpupower-set.c b/tools/power/cpupower/utils/cpupower-set.c
new file mode 100644
index 000000000..532f46b9a
--- /dev/null
+++ b/tools/power/cpupower/utils/cpupower-set.c
@@ -0,0 +1,99 @@
+/*
+ *  (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 "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;
+
+	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))
+			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;
+}