1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2006, 2008 Stanislav Sedov <stas@FreeBSD.org>. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 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. 15 * 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. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <assert.h> 32 #include <stdio.h> 33 #include <stdlib.h> 34 #include <string.h> 35 #include <unistd.h> 36 #include <fcntl.h> 37 #include <err.h> 38 #include <errno.h> 39 40 #include <sys/types.h> 41 #include <sys/stat.h> 42 #include <sys/mman.h> 43 #include <sys/ioctl.h> 44 #include <sys/ioccom.h> 45 #include <sys/cpuctl.h> 46 47 #include <machine/cpufunc.h> 48 #include <machine/specialreg.h> 49 50 #include "cpucontrol.h" 51 #include "intel.h" 52 53 #define DEFAULT_UCODE_SIZE 2000 /* Size of update data if not specified. */ 54 55 int 56 intel_probe(int fd) 57 { 58 char vendor[13]; 59 int error; 60 cpuctl_cpuid_args_t idargs = { 61 .level = 0, 62 }; 63 64 error = ioctl(fd, CPUCTL_CPUID, &idargs); 65 if (error < 0) { 66 WARN(0, "ioctl()"); 67 return (1); 68 } 69 ((uint32_t *)vendor)[0] = idargs.data[1]; 70 ((uint32_t *)vendor)[1] = idargs.data[3]; 71 ((uint32_t *)vendor)[2] = idargs.data[2]; 72 vendor[12] = '\0'; 73 if (strncmp(vendor, INTEL_VENDOR_ID, sizeof(INTEL_VENDOR_ID)) != 0) 74 return (1); 75 return (0); 76 } 77 78 void 79 intel_update(const char *dev, const char *path) 80 { 81 int fd, devfd; 82 struct stat st; 83 uint32_t *fw_image; 84 int have_ext_table; 85 uint32_t sum; 86 unsigned int i; 87 size_t payload_size; 88 intel_fw_header_t *fw_header; 89 intel_cpu_signature_t *ext_table; 90 intel_ext_header_t *ext_header; 91 uint32_t sig, signature, flags; 92 int32_t revision; 93 ssize_t ext_size; 94 size_t ext_table_size; 95 void *fw_data; 96 size_t data_size, total_size; 97 cpuctl_msr_args_t msrargs = { 98 .msr = MSR_IA32_PLATFORM_ID, 99 }; 100 cpuctl_cpuid_args_t idargs = { 101 .level = 1, /* Signature. */ 102 }; 103 cpuctl_update_args_t args; 104 int error; 105 106 assert(path); 107 assert(dev); 108 109 fd = -1; 110 fw_image = MAP_FAILED; 111 ext_table = NULL; 112 ext_header = NULL; 113 devfd = open(dev, O_RDWR); 114 if (devfd < 0) { 115 WARN(0, "could not open %s for writing", dev); 116 return; 117 } 118 error = ioctl(devfd, CPUCTL_CPUID, &idargs); 119 if (error < 0) { 120 WARN(0, "ioctl(%s)", dev); 121 goto fail; 122 } 123 signature = idargs.data[0]; 124 error = ioctl(devfd, CPUCTL_RDMSR, &msrargs); 125 if (error < 0) { 126 WARN(0, "ioctl(%s)", dev); 127 goto fail; 128 } 129 130 /* 131 * MSR_IA32_PLATFORM_ID contains flag in BCD in bits 52-50. 132 */ 133 flags = 1 << ((msrargs.data >> 50) & 7); 134 msrargs.msr = MSR_BIOS_SIGN; 135 error = ioctl(devfd, CPUCTL_RDMSR, &msrargs); 136 if (error < 0) { 137 WARN(0, "ioctl(%s)", dev); 138 goto fail; 139 } 140 revision = msrargs.data >> 32; /* Revision in the high dword. */ 141 WARNX(2, "found cpu type %#x family %#x model %#x stepping %#x.", 142 (signature >> 12) & 0x03, (signature >> 8) & 0x0f, 143 (signature >> 4) & 0x0f, (signature >> 0) & 0x0f); 144 /* 145 * Open firmware image. 146 */ 147 fd = open(path, O_RDONLY, 0); 148 if (fd < 0) { 149 WARN(0, "open(%s)", path); 150 goto fail; 151 } 152 error = fstat(fd, &st); 153 if (error != 0) { 154 WARN(0, "fstat(%s)", path); 155 goto fail; 156 } 157 if (st.st_size < 0 || (unsigned)st.st_size < sizeof(*fw_header)) { 158 WARNX(2, "file too short: %s", path); 159 goto fail; 160 } 161 162 /* 163 * mmap the whole image. 164 */ 165 fw_image = (uint32_t *)mmap(NULL, st.st_size, PROT_READ, 166 MAP_PRIVATE, fd, 0); 167 if (fw_image == MAP_FAILED) { 168 WARN(0, "mmap(%s)", path); 169 goto fail; 170 } 171 fw_header = (intel_fw_header_t *)fw_image; 172 if (fw_header->header_version != INTEL_HEADER_VERSION || 173 fw_header->loader_revision != INTEL_LOADER_REVISION) { 174 WARNX(2, "%s is not a valid intel firmware: version mismatch", 175 path); 176 goto fail; 177 } 178 /* 179 * According to spec, if data_size == 0, then size of ucode = 2000. 180 */ 181 if (fw_header->data_size == 0) 182 data_size = DEFAULT_UCODE_SIZE; 183 else 184 data_size = fw_header->data_size; 185 if (fw_header->total_size == 0) 186 total_size = data_size + sizeof(*fw_header); 187 else 188 total_size = fw_header->total_size; 189 if (total_size > (unsigned)st.st_size || st.st_size < 0) { 190 WARNX(2, "file too short: %s", path); 191 goto fail; 192 } 193 payload_size = data_size + sizeof(*fw_header); 194 195 /* 196 * Check the primary checksum. 197 */ 198 sum = 0; 199 for (i = 0; i < (payload_size / sizeof(uint32_t)); i++) 200 sum += *((uint32_t *)fw_image + i); 201 if (sum != 0) { 202 WARNX(2, "%s: update data checksum invalid", path); 203 goto fail; 204 } 205 206 /* 207 * Check if there is an extended signature table. 208 */ 209 ext_size = total_size - payload_size; 210 have_ext_table = 0; 211 212 if (ext_size > (signed)sizeof(*ext_header)) { 213 ext_header = 214 (intel_ext_header_t *)((char *)fw_image + payload_size); 215 ext_table = (intel_cpu_signature_t *)(ext_header + 1); 216 217 /* 218 * Check the extended table size. 219 */ 220 ext_table_size = sizeof(*ext_header) + 221 ext_header->sig_count * sizeof(*ext_table); 222 if (ext_table_size + payload_size > total_size) { 223 WARNX(2, "%s: broken extended signature table", path); 224 goto no_table; 225 } 226 227 /* 228 * Check the extended table signature. 229 */ 230 sum = 0; 231 for (i = 0; i < (ext_table_size / sizeof(uint32_t)); i++) 232 sum += *((uint32_t *)ext_header + i); 233 if (sum != 0) { 234 WARNX(2, 235 "%s: extended signature table checksum invalid", 236 path); 237 goto no_table; 238 } 239 have_ext_table = 1; 240 } 241 242 no_table: 243 fw_data = fw_header + 1; /* Pointer to the update data. */ 244 245 /* 246 * Check if the given image is ok for this cpu. 247 */ 248 if (signature == fw_header->cpu_signature && 249 (flags & fw_header->cpu_flags) != 0) 250 goto matched; 251 else if (have_ext_table != 0) { 252 for (i = 0; i < ext_header->sig_count; i++) { 253 sig = ext_table[i].cpu_signature; 254 if (signature == sig && 255 (flags & ext_table[i].cpu_flags) != 0) 256 goto matched; 257 } 258 } else 259 goto fail; 260 261 matched: 262 if (revision >= fw_header->revision) { 263 WARNX(1, "skipping %s of rev %#x: up to date", 264 path, fw_header->revision); 265 goto fail; 266 } 267 fprintf(stderr, "%s: updating cpu %s from rev %#x to rev %#x... ", 268 path, dev, revision, fw_header->revision); 269 args.data = fw_data; 270 args.size = data_size; 271 error = ioctl(devfd, CPUCTL_UPDATE, &args); 272 if (error < 0) { 273 error = errno; 274 fprintf(stderr, "failed.\n"); 275 errno = error; 276 WARN(0, "ioctl()"); 277 goto fail; 278 } 279 fprintf(stderr, "done.\n"); 280 281 fail: 282 if (fw_image != MAP_FAILED) 283 if (munmap(fw_image, st.st_size) != 0) 284 warn("munmap(%s)", path); 285 if (devfd >= 0) 286 close(devfd); 287 if (fd >= 0) 288 close(fd); 289 } 290