cpuctl.c revision 1.26
1 /* $NetBSD: cpuctl.c,v 1.26 2015/11/16 02:02:41 mrg 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 1.26 2015/11/16 02:02:41 mrg 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 #include <stdbool.h> 55 56 #include "cpuctl.h" 57 58 static u_int getcpuid(char **); 59 __dead static void usage(void); 60 61 static void cpu_identify(char **); 62 static void cpu_list(char **); 63 static void cpu_offline(char **); 64 static void cpu_online(char **); 65 static void cpu_intr(char **); 66 static void cpu_nointr(char **); 67 static void cpu_ucode(char **); 68 69 static struct cmdtab { 70 const char *label; 71 bool takesargs; 72 bool argsoptional; 73 void (*func)(char **); 74 } const cpu_cmdtab[] = { 75 { "identify", true, false, cpu_identify }, 76 { "list", false, false, cpu_list }, 77 { "offline", true, false, cpu_offline }, 78 { "online", true, false, cpu_online }, 79 { "intr", true, false, cpu_intr }, 80 { "nointr", true, false, cpu_nointr }, 81 { "ucode", true, true, cpu_ucode }, 82 { NULL, false, false, NULL }, 83 }; 84 85 static int fd; 86 int verbose; 87 88 int 89 main(int argc, char **argv) 90 { 91 const struct cmdtab *ct; 92 int ch; 93 94 while ((ch = getopt(argc, argv, "v")) != -1) 95 switch (ch) { 96 case 'v': 97 verbose = 1; 98 break; 99 default: 100 usage(); 101 } 102 argc -= optind; 103 argv += optind; 104 if (argc < 1) 105 usage(); 106 107 if ((fd = open(_PATH_CPUCTL, O_RDWR)) < 0) 108 err(EXIT_FAILURE, _PATH_CPUCTL); 109 110 for (ct = cpu_cmdtab; ct->label != NULL; ct++) { 111 if (strcmp(argv[0], ct->label) == 0) { 112 if (!ct->argsoptional && 113 ((ct->takesargs == 0) ^ (argv[1] == NULL))) 114 { 115 usage(); 116 } 117 (*ct->func)(argv + 1); 118 break; 119 } 120 } 121 122 if (ct->label == NULL) 123 errx(EXIT_FAILURE, "unknown command ``%s''", argv[0]); 124 125 close(fd); 126 exit(EXIT_SUCCESS); 127 /* NOTREACHED */ 128 } 129 130 static void 131 usage(void) 132 { 133 const char *progname = getprogname(); 134 135 fprintf(stderr, "usage: %s identify cpuno\n", progname); 136 fprintf(stderr, " %s list\n", progname); 137 fprintf(stderr, " %s offline cpuno\n", progname); 138 fprintf(stderr, " %s online cpuno\n", progname); 139 fprintf(stderr, " %s intr cpuno\n", progname); 140 fprintf(stderr, " %s nointr cpuno\n", progname); 141 fprintf(stderr, " %s ucode [cpuno] [file]\n", progname); 142 exit(EXIT_FAILURE); 143 /* NOTREACHED */ 144 } 145 146 static void 147 cpu_online(char **argv) 148 { 149 cpustate_t cs; 150 151 cs.cs_id = getcpuid(argv); 152 if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0) 153 err(EXIT_FAILURE, "IOC_CPU_GETSTATE"); 154 cs.cs_online = true; 155 if (ioctl(fd, IOC_CPU_SETSTATE, &cs) < 0) 156 err(EXIT_FAILURE, "IOC_CPU_SETSTATE"); 157 } 158 159 static void 160 cpu_offline(char **argv) 161 { 162 cpustate_t cs; 163 164 cs.cs_id = getcpuid(argv); 165 if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0) 166 err(EXIT_FAILURE, "IOC_CPU_GETSTATE"); 167 cs.cs_online = false; 168 if (ioctl(fd, IOC_CPU_SETSTATE, &cs) < 0) 169 err(EXIT_FAILURE, "IOC_CPU_SETSTATE"); 170 } 171 172 static void 173 cpu_intr(char **argv) 174 { 175 cpustate_t cs; 176 177 cs.cs_id = getcpuid(argv); 178 if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0) 179 err(EXIT_FAILURE, "IOC_CPU_GETSTATE"); 180 cs.cs_intr = true; 181 if (ioctl(fd, IOC_CPU_SETSTATE, &cs) < 0) 182 err(EXIT_FAILURE, "IOC_CPU_SETSTATE"); 183 } 184 185 static void 186 cpu_nointr(char **argv) 187 { 188 cpustate_t cs; 189 190 cs.cs_id = getcpuid(argv); 191 if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0) 192 err(EXIT_FAILURE, "IOC_CPU_GETSTATE"); 193 cs.cs_intr = false; 194 if (ioctl(fd, IOC_CPU_SETSTATE, &cs) < 0) { 195 if (errno == EOPNOTSUPP) { 196 warnx("interrupt control not supported on " 197 "this platform"); 198 } else 199 err(EXIT_FAILURE, "IOC_CPU_SETSTATE"); 200 } 201 } 202 203 static void 204 cpu_ucode(char **argv) 205 { 206 int error; 207 struct cpu_ucode uc; 208 unsigned long id = 0; /* gcc */ 209 char *ep; 210 cpuset_t *cpuset; 211 212 uc.cpu_nr = -1; 213 if (argv[0] != NULL) { 214 id = strtoul(argv[0], &ep, 0); 215 if (id != ULONG_MAX && *ep == '\0') { 216 uc.cpu_nr = id; 217 argv++; 218 } 219 } 220 if (argv[0] != NULL) 221 strlcpy(uc.fwname, argv[0], sizeof(uc.fwname)); 222 else 223 memset(uc.fwname, '\0', sizeof(uc.fwname)); 224 225 error = ucodeupdate_check(fd, &uc); 226 if (error) 227 errx(EXIT_FAILURE, "unsupported"); 228 229 if (uc.cpu_nr == CPU_UCODE_CURRENT_CPU) { 230 cpuset = cpuset_create(); 231 if (cpuset == NULL) 232 err(EXIT_FAILURE, "cpuset_create"); 233 cpuset_zero(cpuset); 234 cpuset_set(id, cpuset); 235 if (_sched_setaffinity(0, 0, cpuset_size(cpuset), cpuset) < 0) { 236 err(EXIT_FAILURE, "_sched_setaffinity"); 237 } 238 cpuset_destroy(cpuset); 239 } 240 error = ioctl(fd, IOC_CPU_UCODE_APPLY, &uc); 241 if (error < 0) { 242 if (uc.fwname[0]) 243 err(EXIT_FAILURE, "%s", uc.fwname); 244 else 245 err(EXIT_FAILURE, "IOC_CPU_UCODE_APPLY"); 246 } 247 } 248 249 250 static void 251 cpu_identify(char **argv) 252 { 253 char name[32]; 254 unsigned int id, np; 255 cpuset_t *cpuset; 256 257 np = sysconf(_SC_NPROCESSORS_CONF); 258 id = getcpuid(argv); 259 snprintf(name, sizeof(name), "cpu%u", id); 260 261 if (np != 1) { 262 cpuset = cpuset_create(); 263 if (cpuset == NULL) 264 err(EXIT_FAILURE, "cpuset_create"); 265 cpuset_zero(cpuset); 266 cpuset_set(id, cpuset); 267 if (_sched_setaffinity(0, 0, cpuset_size(cpuset), cpuset) < 0) { 268 if (errno == EPERM) { 269 printf("Cannot bind to target CPU. Output " 270 "may not accurately describe the target.\n" 271 "Run as root to allow binding.\n\n"); 272 } else { 273 err(EXIT_FAILURE, "_sched_setaffinity"); 274 } 275 } 276 cpuset_destroy(cpuset); 277 } 278 identifycpu(fd, name); 279 } 280 281 static u_int 282 getcpuid(char **argv) 283 { 284 char *argp; 285 u_int id; 286 long np; 287 288 id = (u_int)strtoul(argv[0], &argp, 0); 289 if (*argp != '\0') 290 usage(); 291 292 np = sysconf(_SC_NPROCESSORS_CONF); 293 if (id >= (u_long)np) 294 errx(EXIT_FAILURE, "Invalid CPU number"); 295 296 return id; 297 } 298 299 static void 300 cpu_list(char **argv) 301 { 302 const char *state, *intr; 303 cpustate_t cs; 304 u_int cnt, i; 305 time_t lastmod; 306 char ibuf[16], *ts; 307 308 if (ioctl(fd, IOC_CPU_GETCOUNT, &cnt) < 0) 309 err(EXIT_FAILURE, "IOC_CPU_GETCOUNT"); 310 311 printf( 312 "Num HwId Unbound LWPs Interrupts Last change #Intr\n" 313 "---- ---- ------------ ---------- ------------------------ -----\n"); 314 315 for (i = 0; i < cnt; i++) { 316 cs.cs_id = i; 317 if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0) 318 err(EXIT_FAILURE, "IOC_CPU_GETSTATE"); 319 if (ioctl(fd, IOC_CPU_MAPID, &cs.cs_id) < 0) 320 err(EXIT_FAILURE, "IOC_CPU_MAPID"); 321 if (cs.cs_online) 322 state = "online"; 323 else 324 state = "offline"; 325 if (cs.cs_intr) 326 intr = "intr"; 327 else 328 intr = "nointr"; 329 if (cs.cs_intrcnt == 0) 330 strcpy(ibuf, "?"); 331 else 332 snprintf(ibuf, sizeof(ibuf), "%d", cs.cs_intrcnt - 1); 333 334 lastmod = (time_t)cs.cs_lastmod | 335 ((time_t)cs.cs_lastmodhi << 32); 336 ts = asctime(localtime(&lastmod)); 337 ts[strlen(ts) - 1] = '\0'; 338 printf("%-4d %-4x %-12s %-10s %s %-5s\n", 339 i, cs.cs_hwid, state, 340 intr, ts, ibuf); 341 } 342 } 343 344 int 345 aprint_normal(const char *fmt, ...) 346 { 347 va_list ap; 348 int rv; 349 350 va_start(ap, fmt); 351 rv = vfprintf(stdout, fmt, ap); 352 va_end(ap); 353 354 return rv; 355 } 356 __strong_alias(aprint_verbose,aprint_normal) 357 __strong_alias(aprint_error,aprint_normal) 358 359 int 360 aprint_normal_dev(const char *dev, const char *fmt, ...) 361 { 362 va_list ap; 363 int rv; 364 365 printf("%s: ", dev); 366 va_start(ap, fmt); 367 rv = vfprintf(stdout, fmt, ap); 368 va_end(ap); 369 370 return rv; 371 } 372 __strong_alias(aprint_verbose_dev,aprint_normal_dev) 373 __strong_alias(aprint_error_dev,aprint_normal_dev) 374
Indexes created Thu Oct 02 14:10:14 GMT 2025