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-rw-r--r--tools/power/cpupower/utils/cpupower.c237
1 files changed, 237 insertions, 0 deletions
diff --git a/tools/power/cpupower/utils/cpupower.c b/tools/power/cpupower/utils/cpupower.c
new file mode 100644
index 000000000..8e3d08042
--- /dev/null
+++ b/tools/power/cpupower/utils/cpupower.c
@@ -0,0 +1,237 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * (C) 2010,2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
+ *
+ * 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 <sched.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/utsname.h>
+
+#include "builtin.h"
+#include "helpers/helpers.h"
+#include "helpers/bitmask.h"
+
+#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;
+int base_cpu;
+/* Affected cpus chosen by -c/--cpu param */
+struct bitmask *cpus_chosen;
+
+#ifdef DEBUG
+int be_verbose;
+#endif
+
+static void print_help(void);
+
+struct cmd_struct {
+ const char *cmd;
+ int (*main)(int, const char **);
+ int needs_root;
+};
+
+static struct cmd_struct commands[] = {
+ { "frequency-info", cmd_freq_info, 0 },
+ { "frequency-set", cmd_freq_set, 1 },
+ { "idle-info", cmd_idle_info, 0 },
+ { "idle-set", cmd_idle_set, 1 },
+ { "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;
+ struct stat statbuf;
+ struct utsname uts;
+ char pathname[32];
+
+ 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";
+ }
+
+ base_cpu = sched_getcpu();
+ if (base_cpu < 0) {
+ fprintf(stderr, _("No valid cpus found.\n"));
+ return EXIT_FAILURE;
+ }
+
+ get_cpu_info(&cpupower_cpu_info);
+ run_as_root = !geteuid();
+ if (run_as_root) {
+ ret = uname(&uts);
+ sprintf(pathname, "/dev/cpu/%d/msr", base_cpu);
+ if (!ret && !strcmp(uts.machine, "x86_64") &&
+ stat(pathname, &statbuf) != 0) {
+ if (system("modprobe msr") == -1)
+ fprintf(stderr, _("MSR access not available.\n"));
+ }
+ }
+
+ 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;
+}