Merge branch 'master' into for-next

Fast-forward merge with Linus to be able to merge patches
based on more recent version of the tree.

1 files changed, 214 insertions, 0 deletions

diff --git a/tools/power/cpupower/utils/cpupower.c b/tools/power/cpupower/utils/cpupower.c
new file mode 100644
index 000000000000..52bee591c1c5
--- /dev/null
+++ b/tools/power/cpupower/utils/cpupower.c
@@ -0,0 +1,214 @@
+/*
+ *  (C) 2010,2011       Thomas Renninger <trenn@suse.de>, Novell Inc.
+ *
+ *  Licensed under the terms of the GNU GPL License version 2.
+ *
+ *  Ideas taken over from the perf userspace tool (included in the Linus
+ *  kernel git repo): subcommand builtins and param parsing.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "builtin.h"
+#include "helpers/helpers.h"
+#include "helpers/bitmask.h"
+
+struct cmd_struct {
+	const char *cmd;
+	int (*main)(int, const char **);
+	int needs_root;
+};
+
+#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
+
+static int cmd_help(int argc, const char **argv);
+
+/* Global cpu_info object available for all binaries
+ * Info only retrieved from CPU 0
+ *
+ * Values will be zero/unknown on non X86 archs
+ */
+struct cpupower_cpu_info cpupower_cpu_info;
+int run_as_root;
+/* Affected cpus chosen by -c/--cpu param */
+struct bitmask *cpus_chosen;
+
+#ifdef DEBUG
+int be_verbose;
+#endif
+
+static void print_help(void);
+
+static struct cmd_struct commands[] = {
+	{ "frequency-info",	cmd_freq_info,	0	},
+	{ "frequency-set",	cmd_freq_set,	1	},
+	{ "idle-info",		cmd_idle_info,	0	},
+	{ "set",		cmd_set,	1	},
+	{ "info",		cmd_info,	0	},
+	{ "monitor",		cmd_monitor,	0	},
+	{ "help",		cmd_help,	0	},
+	/*	{ "bench",	cmd_bench,	1	}, */
+};
+
+static void print_help(void)
+{
+	unsigned int i;
+
+#ifdef DEBUG
+	printf(_("Usage:\tcpupower [-d|--debug] [-c|--cpu cpulist ] <command> [<args>]\n"));
+#else
+	printf(_("Usage:\tcpupower [-c|--cpu cpulist ] <command> [<args>]\n"));
+#endif
+	printf(_("Supported commands are:\n"));
+	for (i = 0; i < ARRAY_SIZE(commands); i++)
+		printf("\t%s\n", commands[i].cmd);
+	printf(_("\nNot all commands can make use of the -c cpulist option.\n"));
+	printf(_("\nUse 'cpupower help <command>' for getting help for above commands.\n"));
+}
+
+static int print_man_page(const char *subpage)
+{
+	int len;
+	char *page;
+
+	len = 10; /* enough for "cpupower-" */
+	if (subpage != NULL)
+		len += strlen(subpage);
+
+	page = malloc(len);
+	if (!page)
+		return -ENOMEM;
+
+	sprintf(page, "cpupower");
+	if ((subpage != NULL) && strcmp(subpage, "help")) {
+		strcat(page, "-");
+		strcat(page, subpage);
+	}
+
+	execlp("man", "man", page, NULL);
+
+	/* should not be reached */
+	return -EINVAL;
+}
+
+static int cmd_help(int argc, const char **argv)
+{
+	if (argc > 1) {
+		print_man_page(argv[1]); /* exits within execlp() */
+		return EXIT_FAILURE;
+	}
+
+	print_help();
+	return EXIT_SUCCESS;
+}
+
+static void print_version(void)
+{
+	printf(PACKAGE " " VERSION "\n");
+	printf(_("Report errors and bugs to %s, please.\n"), PACKAGE_BUGREPORT);
+}
+
+static void handle_options(int *argc, const char ***argv)
+{
+	int ret, x, new_argc = 0;
+
+	if (*argc < 1)
+		return;
+
+	for (x = 0;  x < *argc && ((*argv)[x])[0] == '-'; x++) {
+		const char *param = (*argv)[x];
+		if (!strcmp(param, "-h") || !strcmp(param, "--help")) {
+			print_help();
+			exit(EXIT_SUCCESS);
+		} else if (!strcmp(param, "-c") || !strcmp(param, "--cpu")) {
+			if (*argc < 2) {
+				print_help();
+				exit(EXIT_FAILURE);
+			}
+			if (!strcmp((*argv)[x+1], "all"))
+				bitmask_setall(cpus_chosen);
+			else {
+				ret = bitmask_parselist(
+						(*argv)[x+1], cpus_chosen);
+				if (ret < 0) {
+					fprintf(stderr, _("Error parsing cpu "
+							  "list\n"));
+					exit(EXIT_FAILURE);
+				}
+			}
+			x += 1;
+			/* Cut out param: cpupower -c 1 info -> cpupower info */
+			new_argc += 2;
+			continue;
+		} else if (!strcmp(param, "-v") ||
+			!strcmp(param, "--version")) {
+			print_version();
+			exit(EXIT_SUCCESS);
+#ifdef DEBUG
+		} else if (!strcmp(param, "-d") || !strcmp(param, "--debug")) {
+			be_verbose = 1;
+			new_argc++;
+			continue;
+#endif
+		} else {
+			fprintf(stderr, "Unknown option: %s\n", param);
+			print_help();
+			exit(EXIT_FAILURE);
+		}
+	}
+	*argc -= new_argc;
+	*argv += new_argc;
+}
+
+int main(int argc, const char *argv[])
+{
+	const char *cmd;
+	unsigned int i, ret;
+
+	cpus_chosen = bitmask_alloc(sysconf(_SC_NPROCESSORS_CONF));
+
+	argc--;
+	argv += 1;
+
+	handle_options(&argc, &argv);
+
+	cmd = argv[0];
+
+	if (argc < 1) {
+		print_help();
+		return EXIT_FAILURE;
+	}
+
+	setlocale(LC_ALL, "");
+	textdomain(PACKAGE);
+
+	/* Turn "perf cmd --help" into "perf help cmd" */
+	if (argc > 1 && !strcmp(argv[1], "--help")) {
+		argv[1] = argv[0];
+		argv[0] = cmd = "help";
+	}
+
+	get_cpu_info(0, &cpupower_cpu_info);
+	run_as_root = !getuid();
+
+	for (i = 0; i < ARRAY_SIZE(commands); i++) {
+		struct cmd_struct *p = commands + i;
+		if (strcmp(p->cmd, cmd))
+			continue;
+		if (!run_as_root && p->needs_root) {
+			fprintf(stderr, _("Subcommand %s needs root "
+					  "privileges\n"), cmd);
+			return EXIT_FAILURE;
+		}
+		ret = p->main(argc, argv);
+		if (cpus_chosen)
+			bitmask_free(cpus_chosen);
+		return ret;
+	}
+	print_help();
+	return EXIT_FAILURE;
+}