cpuctl.c revision 1.24
1 /* $NetBSD: cpuctl.c,v 1.24 2014/11/20 12:49:13 msaitoh 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 1.24 2014/11/20 12:49:13 msaitoh 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[optind]); 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 [cpuno] [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 unsigned long id = 0; /* gcc */ 208 char *ep; 209 cpuset_t *cpuset; 210 211 uc.cpu_nr = -1; 212 if (argv[0] != NULL) { 213 id = strtoul(argv[0], &ep, 0); 214 if (id != ULONG_MAX && *ep == '\0') { 215 uc.cpu_nr = id; 216 argv++; 217 } 218 } 219 if (argv[0] != NULL) 220 strlcpy(uc.fwname, argv[0], sizeof(uc.fwname)); 221 else 222 memset(uc.fwname, '\0', sizeof(uc.fwname)); 223 224 error = ucodeupdate_check(fd, &uc); 225 if (error) 226 errx(EXIT_FAILURE, "unsupported"); 227 228 if (uc.cpu_nr == CPU_UCODE_CURRENT_CPU) { 229 cpuset = cpuset_create(); 230 if (cpuset == NULL) 231 err(EXIT_FAILURE, "cpuset_create"); 232 cpuset_zero(cpuset); 233 cpuset_set(id, cpuset); 234 if (_sched_setaffinity(0, 0, cpuset_size(cpuset), cpuset) < 0) { 235 err(EXIT_FAILURE, "_sched_setaffinity"); 236 } 237 cpuset_destroy(cpuset); 238 } 239 error = ioctl(fd, IOC_CPU_UCODE_APPLY, &uc); 240 if (error < 0) { 241 if (uc.fwname[0]) 242 err(EXIT_FAILURE, "%s", uc.fwname); 243 else 244 err(EXIT_FAILURE, "IOC_CPU_UCODE_APPLY"); 245 } 246 } 247 248 249 static void 250 cpu_identify(char **argv) 251 { 252 char name[32]; 253 unsigned int id, np; 254 cpuset_t *cpuset; 255 256 np = sysconf(_SC_NPROCESSORS_CONF); 257 id = getcpuid(argv); 258 snprintf(name, sizeof(name), "cpu%u", id); 259 260 if (np != 1) { 261 cpuset = cpuset_create(); 262 if (cpuset == NULL) 263 err(EXIT_FAILURE, "cpuset_create"); 264 cpuset_zero(cpuset); 265 cpuset_set(id, cpuset); 266 if (_sched_setaffinity(0, 0, cpuset_size(cpuset), cpuset) < 0) { 267 if (errno == EPERM) { 268 printf("Cannot bind to target CPU. Output " 269 "may not accurately describe the target.\n" 270 "Run as root to allow binding.\n\n"); 271 } else { 272 err(EXIT_FAILURE, "_sched_setaffinity"); 273 } 274 } 275 cpuset_destroy(cpuset); 276 } 277 identifycpu(fd, name); 278 } 279 280 static u_int 281 getcpuid(char **argv) 282 { 283 char *argp; 284 u_int id; 285 long np; 286 287 id = (u_int)strtoul(argv[0], &argp, 0); 288 if (*argp != '\0') 289 usage(); 290 291 np = sysconf(_SC_NPROCESSORS_CONF); 292 if (id >= (u_long)np) 293 errx(EXIT_FAILURE, "Invalid CPU number"); 294 295 return id; 296 } 297 298 static void 299 cpu_list(char **argv) 300 { 301 const char *state, *intr; 302 cpustate_t cs; 303 u_int cnt, i; 304 time_t lastmod; 305 char ibuf[16], *ts; 306 307 if (ioctl(fd, IOC_CPU_GETCOUNT, &cnt) < 0) 308 err(EXIT_FAILURE, "IOC_CPU_GETCOUNT"); 309 310 printf( 311 "Num HwId Unbound LWPs Interrupts Last change #Intr\n" 312 "---- ---- ------------ ---------- ------------------------ -----\n"); 313 314 for (i = 0; i < cnt; i++) { 315 cs.cs_id = i; 316 if (ioctl(fd, IOC_CPU_GETSTATE, &cs) < 0) 317 err(EXIT_FAILURE, "IOC_CPU_GETSTATE"); 318 if (ioctl(fd, IOC_CPU_MAPID, &cs.cs_id) < 0) 319 err(EXIT_FAILURE, "IOC_CPU_MAPID"); 320 if (cs.cs_online) 321 state = "online"; 322 else 323 state = "offline"; 324 if (cs.cs_intr) 325 intr = "intr"; 326 else 327 intr = "nointr"; 328 if (cs.cs_intrcnt == 0) 329 strcpy(ibuf, "?"); 330 else 331 snprintf(ibuf, sizeof(ibuf), "%d", cs.cs_intrcnt - 1); 332 333 lastmod = (time_t)cs.cs_lastmod | 334 ((time_t)cs.cs_lastmodhi << 32); 335 ts = asctime(localtime(&lastmod)); 336 ts[strlen(ts) - 1] = '\0'; 337 printf("%-4d %-4x %-12s %-10s %s %-5s\n", 338 i, cs.cs_hwid, state, 339 intr, ts, ibuf); 340 } 341 } 342 343 int 344 aprint_normal(const char *fmt, ...) 345 { 346 va_list ap; 347 int rv; 348 349 va_start(ap, fmt); 350 rv = vfprintf(stdout, fmt, ap); 351 va_end(ap); 352 353 return rv; 354 } 355 __strong_alias(aprint_verbose,aprint_normal) 356 __strong_alias(aprint_error,aprint_normal) 357 358 int 359 aprint_normal_dev(const char *dev, const char *fmt, ...) 360 { 361 va_list ap; 362 int rv; 363 364 printf("%s: ", dev); 365 va_start(ap, fmt); 366 rv = vfprintf(stdout, fmt, ap); 367 va_end(ap); 368 369 return rv; 370 } 371 __strong_alias(aprint_verbose_dev,aprint_normal_dev) 372 __strong_alias(aprint_error_dev,aprint_normal_dev) 373
Indexes created Thu Oct 02 14:10:14 GMT 2025