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 struct ucode_update_params *params) 80 { 81 int devfd; 82 const char *dev, *path; 83 const uint32_t *fw_image; 84 int have_ext_table; 85 uint32_t sum; 86 unsigned int i; 87 size_t payload_size; 88 const intel_fw_header_t *fw_header; 89 const intel_cpu_signature_t *ext_table; 90 const 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 const void *fw_data; 96 size_t data_size, total_size; 97 cpuctl_msr_args_t msrargs = { 98 .msr = MSR_BIOS_SIGN, 99 .data = 0, 100 }; 101 cpuctl_cpuid_args_t idargs = { 102 .level = 1, /* Signature. */ 103 }; 104 cpuctl_update_args_t args; 105 int error; 106 107 dev = params->dev_path; 108 path = params->fw_path; 109 devfd = params->devfd; 110 fw_image = params->fwimage; 111 112 assert(path); 113 assert(dev); 114 115 ext_table = NULL; 116 ext_header = NULL; 117 118 error = ioctl(devfd, CPUCTL_WRMSR, &msrargs); 119 if (error < 0) { 120 WARN(0, "ioctl(%s)", dev); 121 goto fail; 122 } 123 error = ioctl(devfd, CPUCTL_CPUID, &idargs); 124 if (error < 0) { 125 WARN(0, "ioctl(%s)", dev); 126 goto fail; 127 } 128 signature = idargs.data[0]; 129 msrargs.msr = MSR_IA32_PLATFORM_ID; 130 error = ioctl(devfd, CPUCTL_RDMSR, &msrargs); 131 if (error < 0) { 132 WARN(0, "ioctl(%s)", dev); 133 goto fail; 134 } 135 136 /* 137 * MSR_IA32_PLATFORM_ID contains flag in BCD in bits 52-50. 138 */ 139 flags = 1 << ((msrargs.data >> 50) & 7); 140 msrargs.msr = MSR_BIOS_SIGN; 141 error = ioctl(devfd, CPUCTL_RDMSR, &msrargs); 142 if (error < 0) { 143 WARN(0, "ioctl(%s)", dev); 144 goto fail; 145 } 146 revision = msrargs.data >> 32; /* Revision in the high dword. */ 147 WARNX(2, "found cpu type %#x family %#x model %#x stepping %#x.", 148 (signature >> 12) & 0x03, (signature >> 8) & 0x0f, 149 (signature >> 4) & 0x0f, (signature >> 0) & 0x0f); 150 /* 151 * Open firmware image. 152 */ 153 if (params->fwsize < sizeof(*fw_header)) { 154 WARNX(2, "file too short: %s", path); 155 goto fail; 156 } 157 158 fw_header = (const intel_fw_header_t *)fw_image; 159 if (fw_header->header_version != INTEL_HEADER_VERSION || 160 fw_header->loader_revision != INTEL_LOADER_REVISION) { 161 WARNX(2, "%s is not a valid intel firmware: version mismatch", 162 path); 163 goto fail; 164 } 165 /* 166 * According to spec, if data_size == 0, then size of ucode = 2000. 167 */ 168 if (fw_header->data_size == 0) 169 data_size = DEFAULT_UCODE_SIZE; 170 else 171 data_size = fw_header->data_size; 172 if (fw_header->total_size == 0) 173 total_size = data_size + sizeof(*fw_header); 174 else 175 total_size = fw_header->total_size; 176 if (total_size > params->fwsize) { 177 WARNX(2, "file too short: %s", path); 178 goto fail; 179 } 180 payload_size = data_size + sizeof(*fw_header); 181 182 /* 183 * Check the primary checksum. 184 */ 185 sum = 0; 186 for (i = 0; i < (payload_size / sizeof(uint32_t)); i++) 187 sum += *((const uint32_t *)fw_image + i); 188 if (sum != 0) { 189 WARNX(2, "%s: update data checksum invalid", path); 190 goto fail; 191 } 192 193 /* 194 * Check if there is an extended signature table. 195 */ 196 ext_size = total_size - payload_size; 197 have_ext_table = 0; 198 199 if (ext_size > (signed)sizeof(*ext_header)) { 200 ext_header = (const intel_ext_header_t *) 201 ((const char *)fw_image + payload_size); 202 ext_table = (const intel_cpu_signature_t *)(ext_header + 1); 203 204 /* 205 * Check the extended table size. 206 */ 207 ext_table_size = sizeof(*ext_header) + 208 ext_header->sig_count * sizeof(*ext_table); 209 if (ext_table_size + payload_size > total_size) { 210 WARNX(2, "%s: broken extended signature table", path); 211 goto no_table; 212 } 213 214 /* 215 * Check the extended table signature. 216 */ 217 sum = 0; 218 for (i = 0; i < (ext_table_size / sizeof(uint32_t)); i++) 219 sum += *((const uint32_t *)ext_header + i); 220 if (sum != 0) { 221 WARNX(2, 222 "%s: extended signature table checksum invalid", 223 path); 224 goto no_table; 225 } 226 have_ext_table = 1; 227 } 228 229 no_table: 230 fw_data = fw_header + 1; /* Pointer to the update data. */ 231 232 /* 233 * Check if the given image is ok for this cpu. 234 */ 235 if (signature == fw_header->cpu_signature && 236 (flags & fw_header->cpu_flags) != 0) 237 goto matched; 238 else if (have_ext_table != 0) { 239 for (i = 0; i < ext_header->sig_count; i++) { 240 sig = ext_table[i].cpu_signature; 241 if (signature == sig && 242 (flags & ext_table[i].cpu_flags) != 0) 243 goto matched; 244 } 245 } 246 goto fail; 247 248 matched: 249 if (revision >= fw_header->revision) { 250 WARNX(1, "skipping %s of rev %#x: up to date", 251 path, fw_header->revision); 252 goto fail; 253 } 254 fprintf(stderr, "%s: updating cpu %s from rev %#x to rev %#x... ", 255 path, dev, revision, fw_header->revision); 256 args.data = __DECONST(void *, fw_data); 257 args.size = data_size; 258 error = ioctl(devfd, CPUCTL_UPDATE, &args); 259 if (error < 0) { 260 error = errno; 261 fprintf(stderr, "failed.\n"); 262 errno = error; 263 WARN(0, "ioctl()"); 264 goto fail; 265 } 266 fprintf(stderr, "done.\n"); 267 268 fail: 269 return; 270 } 271