cpuctl.c revision 1.20.2.1
1 /* $NetBSD: cpuctl.c,v 1.20.2.1 2015/01/16 08:30:50 snj Exp $ */ 2 3 /*- 4 * Copyright (c) 2007, 2008, 2009, 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 #include <sys/cdefs.h> 34 __RCSID("$NetBSD: cpuctl.c,v 1.20.2.1 2015/01/16 08:30:50 snj Exp $"); 35 #endif /* not lint */ 36 37 #include <sys/param.h> 38 #include <sys/ioctl.h> 39 #include <sys/uio.h> 40 #include <sys/cpuio.h> 41 42 #include <err.h> 43 #include <errno.h> 44 #include <fcntl.h> 45 #include <paths.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <stdarg.h> 49 #include <string.h> 50 #include <unistd.h> 51 #include <util.h> 52 #include <time.h> 53 #include <sched.h> 54 55 #include "cpuctl.h" 56 57 static u_int getcpuid(char **); 58 __dead static void usage(void); 59 60 static void cpu_identify(char **); 61 static void cpu_list(char **); 62 static void cpu_offline(char **); 63 static void cpu_online(char **); 64 static void cpu_intr(char **); 65 static void cpu_nointr(char **); 66 static void cpu_ucode(char **); 67 68 static struct cmdtab { 69 const char *label; 70 int takesargs; 71 int argsoptional; 72 void (*func)(char **); 73 } const cpu_cmdtab[] = { 74 { "identify", 1, 0, cpu_identify }, 75 { "list", 0, 0, cpu_list }, 76 { "offline", 1, 0, cpu_offline }, 77 { "online", 1, 0, cpu_online }, 78 { "intr", 1, 0, cpu_intr }, 79 { "nointr", 1, 0, cpu_nointr }, 80 { "ucode", 1, 1, cpu_ucode }, 81 { NULL, 0, 0, NULL }, 82 }; 83 84 static int fd; 85 int verbose; 86 87 int 88 main(int argc, char **argv) 89 { 90 const struct cmdtab *ct; 91 int ch; 92 93 while ((ch = getopt(argc, argv, "v")) != -1) 94 switch (ch) { 95 case 'v': 96 verbose = 1; 97 break; 98 default: 99 usage(); 100 } 101 argc -= optind; 102 argv += optind; 103 if (argc < 1) 104 usage(); 105 106 if ((fd = open(_PATH_CPUCTL, O_RDWR)) < 0) 107 err(EXIT_FAILURE, _PATH_CPUCTL); 108 109 for (ct = cpu_cmdtab; ct->label != NULL; ct++) { 110 if (strcmp(argv[0], ct->label) == 0) { 111 if (!ct->argsoptional && 112 ((ct->takesargs == 0) ^ (argv[1] == NULL))) 113 { 114 usage(); 115 } 116 (*ct->func)(argv + 1); 117 break; 118 } 119 } 120 121 if (ct->label == NULL) 122 errx(EXIT_FAILURE, "unknown command ``%s''", argv[0]); 123 124 close(fd); 125 exit(EXIT_SUCCESS); 126 /* NOTREACHED */ 127 } 128 129 static void 130 usage(void) 131 { 132 const char *progname = getprogname(); 133 134 fprintf(stderr, "usage: %s identify cpuno\n", progname); 135 fprintf(stderr, " %s list\n", progname); 136 fprintf(stderr, " %s offline cpuno\n", progname); 137 fprintf(stderr, " %s online cpuno\n", progname); 138 fprintf(stderr, " %s intr cpuno\n", progname); 139 fprintf(stderr, " %s nointr cpuno\n", progname); 140 fprintf(stderr, " %s ucode [file]\n", progname); 141 exit(EXIT_FAILURE); 142 /* NOTREACHED */ 143 } 144 145 static void 146 cpu_online(char **argv) 147 { 148 cpustate_t cs; 149 150 cs.cs_id = getcpuid(argv); 151 if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0) 152 err(EXIT_FAILURE, "IOC_CPU_GETSTATE"); 153 cs.cs_online = true; 154 if (ioctl(fd, IOC_CPU_SETSTATE, &cs) < 0) 155 err(EXIT_FAILURE, "IOC_CPU_SETSTATE"); 156 } 157 158 static void 159 cpu_offline(char **argv) 160 { 161 cpustate_t cs; 162 163 cs.cs_id = getcpuid(argv); 164 if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0) 165 err(EXIT_FAILURE, "IOC_CPU_GETSTATE"); 166 cs.cs_online = false; 167 if (ioctl(fd, IOC_CPU_SETSTATE, &cs) < 0) 168 err(EXIT_FAILURE, "IOC_CPU_SETSTATE"); 169 } 170 171 static void 172 cpu_intr(char **argv) 173 { 174 cpustate_t cs; 175 176 cs.cs_id = getcpuid(argv); 177 if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0) 178 err(EXIT_FAILURE, "IOC_CPU_GETSTATE"); 179 cs.cs_intr = true; 180 if (ioctl(fd, IOC_CPU_SETSTATE, &cs) < 0) 181 err(EXIT_FAILURE, "IOC_CPU_SETSTATE"); 182 } 183 184 static void 185 cpu_nointr(char **argv) 186 { 187 cpustate_t cs; 188 189 cs.cs_id = getcpuid(argv); 190 if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0) 191 err(EXIT_FAILURE, "IOC_CPU_GETSTATE"); 192 cs.cs_intr = false; 193 if (ioctl(fd, IOC_CPU_SETSTATE, &cs) < 0) { 194 if (errno == EOPNOTSUPP) { 195 warnx("interrupt control not supported on " 196 "this platform"); 197 } else 198 err(EXIT_FAILURE, "IOC_CPU_SETSTATE"); 199 } 200 } 201 202 static void 203 cpu_ucode(char **argv) 204 { 205 int error; 206 struct cpu_ucode uc; 207 208 if (argv[0] != NULL) 209 strlcpy(uc.fwname, argv[0], sizeof(uc.fwname)); 210 else 211 memset(uc.fwname, '\0', sizeof(uc.fwname)); 212 213 error = ioctl(fd, IOC_CPU_UCODE_APPLY, &uc); 214 if (error < 0) { 215 if (uc.fwname[0]) 216 err(EXIT_FAILURE, "%s", uc.fwname); 217 else 218 err(EXIT_FAILURE, "IOC_CPU_UCODE_APPLY"); 219 } 220 } 221 222 223 static void 224 cpu_identify(char **argv) 225 { 226 char name[32]; 227 unsigned int id, np; 228 cpuset_t *cpuset; 229 struct cpu_ucode ucode; 230 char ucbuf[16]; 231 232 np = sysconf(_SC_NPROCESSORS_CONF); 233 id = getcpuid(argv); 234 snprintf(name, sizeof(name), "cpu%u", id); 235 236 if (np != 1) { 237 cpuset = cpuset_create(); 238 if (cpuset == NULL) 239 err(EXIT_FAILURE, "cpuset_create"); 240 cpuset_zero(cpuset); 241 cpuset_set(id, cpuset); 242 if (_sched_setaffinity(0, 0, cpuset_size(cpuset), cpuset) < 0) { 243 if (errno == EPERM) { 244 printf("Cannot bind to target CPU. Output " 245 "may not accurately describe the target.\n" 246 "Run as root to allow binding.\n\n"); 247 } else { 248 err(EXIT_FAILURE, "_sched_setaffinity"); 249 } 250 } 251 cpuset_destroy(cpuset); 252 } 253 identifycpu(name); 254 255 if (ioctl(fd, IOC_CPU_UCODE_GET_VERSION, &ucode) < 0) 256 ucode.version = (uint64_t)-1; 257 if (ucode.version == (uint64_t)-1) 258 strcpy(ucbuf, "?"); 259 else 260 snprintf(ucbuf, sizeof(ucbuf), "0x%"PRIx64, 261 ucode.version); 262 263 printf("%s: UCode version: %s\n", name, ucbuf); 264 } 265 266 static u_int 267 getcpuid(char **argv) 268 { 269 char *argp; 270 u_int id; 271 long np; 272 273 id = (u_int)strtoul(argv[0], &argp, 0); 274 if (*argp != '\0') 275 usage(); 276 277 np = sysconf(_SC_NPROCESSORS_CONF); 278 if (id >= (u_long)np) 279 errx(EXIT_FAILURE, "Invalid CPU number"); 280 281 return id; 282 } 283 284 static void 285 cpu_list(char **argv) 286 { 287 const char *state, *intr; 288 cpustate_t cs; 289 u_int cnt, i; 290 time_t lastmod; 291 char ibuf[16], *ts; 292 293 if (ioctl(fd, IOC_CPU_GETCOUNT, &cnt) < 0) 294 err(EXIT_FAILURE, "IOC_CPU_GETCOUNT"); 295 296 printf( 297 "Num HwId Unbound LWPs Interrupts Last change #Intr\n" 298 "---- ---- ------------ ---------- ------------------------ -----\n"); 299 300 for (i = 0; i < cnt; i++) { 301 cs.cs_id = i; 302 if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0) 303 err(EXIT_FAILURE, "IOC_CPU_GETSTATE"); 304 if (ioctl(fd, IOC_CPU_MAPID, &cs.cs_id) < 0) 305 err(EXIT_FAILURE, "IOC_CPU_MAPID"); 306 if (cs.cs_online) 307 state = "online"; 308 else 309 state = "offline"; 310 if (cs.cs_intr) 311 intr = "intr"; 312 else 313 intr = "nointr"; 314 if (cs.cs_intrcnt == 0) 315 strcpy(ibuf, "?"); 316 else 317 snprintf(ibuf, sizeof(ibuf), "%d", cs.cs_intrcnt - 1); 318 319 lastmod = (time_t)cs.cs_lastmod | 320 ((time_t)cs.cs_lastmodhi << 32); 321 ts = asctime(localtime(&lastmod)); 322 ts[strlen(ts) - 1] = '\0'; 323 printf("%-4d %-4x %-12s %-10s %s %-5s\n", 324 i, cs.cs_hwid, state, 325 intr, ts, ibuf); 326 } 327 } 328 329 int 330 aprint_normal(const char *fmt, ...) 331 { 332 va_list ap; 333 int rv; 334 335 va_start(ap, fmt); 336 rv = vfprintf(stdout, fmt, ap); 337 va_end(ap); 338 339 return rv; 340 } 341 __strong_alias(aprint_verbose,aprint_normal) 342 __strong_alias(aprint_error,aprint_normal) 343 344 int 345 aprint_normal_dev(const char *dev, const char *fmt, ...) 346 { 347 va_list ap; 348 int rv; 349 350 printf("%s: ", dev); 351 va_start(ap, fmt); 352 rv = vfprintf(stdout, fmt, ap); 353 va_end(ap); 354 355 return rv; 356 } 357 __strong_alias(aprint_verbose_dev,aprint_normal_dev) 358 __strong_alias(aprint_error_dev,aprint_normal_dev) 359
Indexes created Mon Oct 27 04:09:48 GMT 2025