1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 #include <assert.h> 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <unistd.h> 34 #include <fcntl.h> 35 #include <err.h> 36 #include <errno.h> 37 38 #include <sys/types.h> 39 #include <sys/stat.h> 40 #include <sys/mman.h> 41 #include <sys/ioctl.h> 42 #include <sys/ioccom.h> 43 #include <sys/cpuctl.h> 44 45 #include <machine/cpufunc.h> 46 #include <machine/specialreg.h> 47 48 #include "cpucontrol.h" 49 #include "intel.h" 50 51 #define DEFAULT_UCODE_SIZE 2000 /* Size of update data if not specified. */ 52 53 int 54 intel_probe(int fd) 55 { 56 char vendor[13]; 57 int error; 58 cpuctl_cpuid_args_t idargs = { 59 .level = 0, 60 }; 61 62 error = ioctl(fd, CPUCTL_CPUID, &idargs); 63 if (error < 0) { 64 WARN(0, "ioctl()"); 65 return (1); 66 } 67 ((uint32_t *)vendor)[0] = idargs.data[1]; 68 ((uint32_t *)vendor)[1] = idargs.data[3]; 69 ((uint32_t *)vendor)[2] = idargs.data[2]; 70 vendor[12] = '\0'; 71 if (strncmp(vendor, INTEL_VENDOR_ID, sizeof(INTEL_VENDOR_ID)) != 0) 72 return (1); 73 return (0); 74 } 75 76 void 77 intel_update(const struct ucode_update_params *params) 78 { 79 int devfd; 80 const char *dev, *path; 81 const uint32_t *fw_image; 82 int have_ext_table; 83 uint32_t sum; 84 unsigned int i; 85 size_t payload_size; 86 const intel_fw_header_t *fw_header; 87 const intel_cpu_signature_t *ext_table; 88 const intel_ext_header_t *ext_header; 89 uint32_t sig, signature, flags; 90 int32_t revision; 91 ssize_t ext_size; 92 size_t ext_table_size; 93 const void *fw_data; 94 size_t data_size, total_size; 95 cpuctl_msr_args_t msrargs = { 96 .msr = MSR_BIOS_SIGN, 97 .data = 0, 98 }; 99 cpuctl_cpuid_args_t idargs = { 100 .level = 1, /* Signature. */ 101 }; 102 cpuctl_update_args_t args; 103 int error; 104 105 dev = params->dev_path; 106 path = params->fw_path; 107 devfd = params->devfd; 108 fw_image = params->fwimage; 109 110 assert(path); 111 assert(dev); 112 113 ext_table = NULL; 114 ext_header = NULL; 115 116 error = ioctl(devfd, CPUCTL_WRMSR, &msrargs); 117 if (error < 0) { 118 WARN(0, "ioctl(%s)", dev); 119 goto fail; 120 } 121 error = ioctl(devfd, CPUCTL_CPUID, &idargs); 122 if (error < 0) { 123 WARN(0, "ioctl(%s)", dev); 124 goto fail; 125 } 126 signature = idargs.data[0]; 127 msrargs.msr = MSR_IA32_PLATFORM_ID; 128 error = ioctl(devfd, CPUCTL_RDMSR, &msrargs); 129 if (error < 0) { 130 WARN(0, "ioctl(%s)", dev); 131 goto fail; 132 } 133 134 /* 135 * MSR_IA32_PLATFORM_ID contains flag in BCD in bits 52-50. 136 */ 137 flags = 1 << ((msrargs.data >> 50) & 7); 138 msrargs.msr = MSR_BIOS_SIGN; 139 error = ioctl(devfd, CPUCTL_RDMSR, &msrargs); 140 if (error < 0) { 141 WARN(0, "ioctl(%s)", dev); 142 goto fail; 143 } 144 revision = msrargs.data >> 32; /* Revision in the high dword. */ 145 WARNX(2, "found cpu type %#x family %#x model %#x stepping %#x.", 146 (signature >> 12) & 0x03, (signature >> 8) & 0x0f, 147 (signature >> 4) & 0x0f, (signature >> 0) & 0x0f); 148 /* 149 * Open firmware image. 150 */ 151 if (params->fwsize < sizeof(*fw_header)) { 152 WARNX(2, "file too short: %s", path); 153 goto fail; 154 } 155 156 fw_header = (const intel_fw_header_t *)fw_image; 157 if (fw_header->header_version != INTEL_HEADER_VERSION || 158 fw_header->loader_revision != INTEL_LOADER_REVISION) { 159 WARNX(2, "%s is not a valid intel firmware: version mismatch", 160 path); 161 goto fail; 162 } 163 /* 164 * According to spec, if data_size == 0, then size of ucode = 2000. 165 */ 166 if (fw_header->data_size == 0) 167 data_size = DEFAULT_UCODE_SIZE; 168 else 169 data_size = fw_header->data_size; 170 if (fw_header->total_size == 0) 171 total_size = data_size + sizeof(*fw_header); 172 else 173 total_size = fw_header->total_size; 174 if (total_size > params->fwsize) { 175 WARNX(2, "file too short: %s", path); 176 goto fail; 177 } 178 payload_size = data_size + sizeof(*fw_header); 179 180 /* 181 * Check the primary checksum. 182 */ 183 sum = 0; 184 for (i = 0; i < (payload_size / sizeof(uint32_t)); i++) 185 sum += *((const uint32_t *)fw_image + i); 186 if (sum != 0) { 187 WARNX(2, "%s: update data checksum invalid", path); 188 goto fail; 189 } 190 191 /* 192 * Check if there is an extended signature table. 193 */ 194 ext_size = total_size - payload_size; 195 have_ext_table = 0; 196 197 if (ext_size > (signed)sizeof(*ext_header)) { 198 ext_header = (const intel_ext_header_t *) 199 ((const char *)fw_image + payload_size); 200 ext_table = (const intel_cpu_signature_t *)(ext_header + 1); 201 202 /* 203 * Check the extended table size. 204 */ 205 ext_table_size = sizeof(*ext_header) + 206 ext_header->sig_count * sizeof(*ext_table); 207 if (ext_table_size + payload_size > total_size) { 208 WARNX(2, "%s: broken extended signature table", path); 209 goto no_table; 210 } 211 212 /* 213 * Check the extended table signature. 214 */ 215 sum = 0; 216 for (i = 0; i < (ext_table_size / sizeof(uint32_t)); i++) 217 sum += *((const uint32_t *)ext_header + i); 218 if (sum != 0) { 219 WARNX(2, 220 "%s: extended signature table checksum invalid", 221 path); 222 goto no_table; 223 } 224 have_ext_table = 1; 225 } 226 227 no_table: 228 fw_data = fw_header + 1; /* Pointer to the update data. */ 229 230 /* 231 * Check if the given image is ok for this cpu. 232 */ 233 if (signature == fw_header->cpu_signature && 234 (flags & fw_header->cpu_flags) != 0) 235 goto matched; 236 else if (have_ext_table != 0) { 237 for (i = 0; i < ext_header->sig_count; i++) { 238 sig = ext_table[i].cpu_signature; 239 if (signature == sig && 240 (flags & ext_table[i].cpu_flags) != 0) 241 goto matched; 242 } 243 } 244 goto fail; 245 246 matched: 247 if (revision >= fw_header->revision) { 248 WARNX(1, "skipping %s of rev %#x: up to date", 249 path, fw_header->revision); 250 goto fail; 251 } 252 fprintf(stderr, "%s: updating cpu %s from rev %#x to rev %#x... ", 253 path, dev, revision, fw_header->revision); 254 args.data = __DECONST(void *, fw_data); 255 args.size = data_size; 256 error = ioctl(devfd, CPUCTL_UPDATE, &args); 257 if (error < 0) { 258 error = errno; 259 fprintf(stderr, "failed.\n"); 260 errno = error; 261 WARN(0, "ioctl()"); 262 goto fail; 263 } 264 fprintf(stderr, "done.\n"); 265 266 fail: 267 return; 268 } 269