2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2008-2011 Stanislav Sedov <stas@FreeBSD.org>.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 * This utility provides userland access to the cpuctl(4) pseudo-device
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
46 #include <sys/queue.h>
47 #include <sys/param.h>
48 #include <sys/types.h>
50 #include <sys/ioctl.h>
51 #include <sys/cpuctl.h>
53 #include "cpucontrol.h"
58 int verbosity_level = 0;
60 #define DEFAULT_DATADIR "/usr/local/share/cpucontrol"
74 #define HIGH(val) (uint32_t)(((val) >> 32) & 0xffffffff)
75 #define LOW(val) (uint32_t)((val) & 0xffffffff)
78 * Macros for freeing SLISTs, probably must be in /sys/queue.h
82 SLIST_ENTRY(datadir) next;
84 static SLIST_HEAD(, datadir) datadirs = SLIST_HEAD_INITIALIZER(datadirs);
86 static struct ucode_handler {
88 ucode_update_t *update;
90 { intel_probe, intel_update },
91 { amd10h_probe, amd10h_update },
92 { amd_probe, amd_update },
93 { via_probe, via_update },
95 #define NHANDLERS (sizeof(handlers) / sizeof(*handlers))
97 static void usage(void);
98 static int isdir(const char *path);
99 static int do_cpuid(const char *cmdarg, const char *dev);
100 static int do_cpuid_count(const char *cmdarg, const char *dev);
101 static int do_msr(const char *cmdarg, const char *dev);
102 static int do_update(const char *dev);
103 static void datadir_add(const char *path);
110 name = getprogname();
113 fprintf(stderr, "Usage: %s [-vh] [-d datadir] [-m msr[=value] | "
114 "-i level | -i level,level_type | -e | -u] device\n", name);
119 isdir(const char *path)
124 error = stat(path, &st);
126 WARN(0, "stat(%s)", path);
129 return (st.st_mode & S_IFDIR);
133 do_cpuid(const char *cmdarg, const char *dev)
136 cpuctl_cpuid_args_t args;
140 assert(cmdarg != NULL);
143 level = strtoul(cmdarg, &endptr, 16);
144 if (*cmdarg == '\0' || *endptr != '\0') {
145 WARNX(0, "incorrect operand: %s", cmdarg);
151 * Fill ioctl argument structure.
154 fd = open(dev, O_RDONLY);
156 WARN(0, "error opening %s for reading", dev);
159 error = ioctl(fd, CPUCTL_CPUID, &args);
161 WARN(0, "ioctl(%s, CPUCTL_CPUID)", dev);
165 fprintf(stdout, "cpuid level 0x%x: 0x%.8x 0x%.8x 0x%.8x 0x%.8x\n",
166 level, args.data[0], args.data[1], args.data[2], args.data[3]);
172 do_cpuid_count(const char *cmdarg, const char *dev)
174 char *cmdarg1, *endptr, *endptr1;
175 unsigned int level, level_type;
176 cpuctl_cpuid_count_args_t args;
179 assert(cmdarg != NULL);
182 level = strtoul(cmdarg, &endptr, 16);
183 if (*cmdarg == '\0' || *endptr == '\0') {
184 WARNX(0, "incorrect or missing operand: %s", cmdarg);
188 /* Locate the comma... */
189 cmdarg1 = strstr(endptr, ",");
190 /* ... and skip past it */
192 level_type = strtoul(cmdarg1, &endptr1, 16);
193 if (*cmdarg1 == '\0' || *endptr1 != '\0') {
194 WARNX(0, "incorrect or missing operand: %s", cmdarg);
200 * Fill ioctl argument structure.
203 args.level_type = level_type;
204 fd = open(dev, O_RDONLY);
206 WARN(0, "error opening %s for reading", dev);
209 error = ioctl(fd, CPUCTL_CPUID_COUNT, &args);
211 WARN(0, "ioctl(%s, CPUCTL_CPUID_COUNT)", dev);
215 fprintf(stdout, "cpuid level 0x%x, level_type 0x%x: 0x%.8x 0x%.8x "
216 "0x%.8x 0x%.8x\n", level, level_type, args.data[0], args.data[1],
217 args.data[2], args.data[3]);
223 do_msr(const char *cmdarg, const char *dev)
226 cpuctl_msr_args_t args;
229 unsigned long command;
230 int do_invert = 0, op;
232 const char *command_name;
236 assert(cmdarg != NULL);
238 len = strlen(cmdarg);
240 WARNX(0, "MSR register expected");
246 * Parse command string.
248 msr = strtoul(cmdarg, &endptr, 16);
267 if (op != OP_READ) { /* Complex operation. */
276 data = strtoull(p, &endptr, 16);
277 if (*p == '\0' || *endptr != '\0') {
278 WARNX(0, "argument required: %s", cmdarg);
284 if (op == OP_INVAL) {
285 WARNX(0, "invalid operator: %s", cmdarg);
291 * Fill ioctl argument structure.
294 if ((do_invert != 0) ^ (op == OP_AND))
300 command = CPUCTL_RDMSR;
301 command_name = "RDMSR";
304 command = CPUCTL_WRMSR;
305 command_name = "WRMSR";
308 command = CPUCTL_MSRSBIT;
309 command_name = "MSRSBIT";
312 command = CPUCTL_MSRCBIT;
313 command_name = "MSRCBIT";
318 fd = open(dev, op == OP_READ ? O_RDONLY : O_WRONLY);
320 WARN(0, "error opening %s for %s", dev,
321 op == OP_READ ? "reading" : "writing");
324 error = ioctl(fd, command, &args);
326 WARN(0, "ioctl(%s, CPUCTL_%s (%lu))", dev, command_name, command);
331 fprintf(stdout, "MSR 0x%x: 0x%.8x 0x%.8x\n", msr,
332 HIGH(args.data), LOW(args.data));
338 do_eval_cpu_features(const char *dev)
344 fd = open(dev, O_RDWR);
346 WARN(0, "error opening %s for writing", dev);
350 error = ioctl(fd, CPUCTL_EVAL_CPU_FEATURES, NULL);
352 WARN(0, "ioctl(%s, CPUCTL_EVAL_CPU_FEATURES)", dev);
359 do_update(const char *dev)
364 struct ucode_handler *handler;
367 struct dirent *direntry;
368 char buf[MAXPATHLEN];
370 fd = open(dev, O_RDONLY);
372 WARN(0, "error opening %s for reading", dev);
377 * Find the appropriate handler for device.
379 for (i = 0; i < NHANDLERS; i++)
380 if (handlers[i].probe(fd) == 0)
383 handler = &handlers[i];
385 WARNX(0, "cannot find the appropriate handler for device");
392 * Process every image in specified data directories.
394 SLIST_FOREACH(dir, &datadirs, next) {
395 dirp = opendir(dir->path);
397 WARNX(1, "skipping directory %s: not accessible", dir->path);
400 while ((direntry = readdir(dirp)) != NULL) {
401 if (direntry->d_namlen == 0)
403 error = snprintf(buf, sizeof(buf), "%s/%s", dir->path,
405 if ((unsigned)error >= sizeof(buf))
406 WARNX(0, "skipping %s, buffer too short",
408 if (isdir(buf) != 0) {
409 WARNX(2, "skipping %s: is a directory", buf);
412 handler->update(dev, buf);
414 error = closedir(dirp);
416 WARN(0, "closedir(%s)", dir->path);
422 * Add new data directory to the search list.
425 datadir_add(const char *path)
427 struct datadir *newdir;
429 newdir = (struct datadir *)malloc(sizeof(*newdir));
431 err(EX_OSERR, "cannot allocate memory");
433 SLIST_INSERT_HEAD(&datadirs, newdir, next);
437 main(int argc, char *argv[])
446 cmdarg = ""; /* To keep gcc3 happy. */
448 while ((c = getopt(argc, argv, "d:ehi:m:nuv")) != -1) {
486 if ((flags & FLAG_N) == 0)
487 datadir_add(DEFAULT_DATADIR);
489 c = flags & (FLAG_E | FLAG_I | FLAG_M | FLAG_U);
492 if (strstr(cmdarg, ",") != NULL)
493 error = do_cpuid_count(cmdarg, dev);
495 error = do_cpuid(cmdarg, dev);
498 error = do_msr(cmdarg, dev);
501 error = do_update(dev);
504 error = do_eval_cpu_features(dev);
507 usage(); /* Only one command can be selected. */
509 return (error == 0 ? 0 : 1);