hw/i386/smbios.c

   1 /*
   2  * SMBIOS Support
   3  *
   4  * Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
   5  * Copyright (C) 2013 Red Hat, Inc.
   6  *
   7  * Authors:
   8  *  Alex Williamson <alex.williamson@hp.com>
   9  *  Markus Armbruster <armbru@redhat.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2.  See
  12  * the COPYING file in the top-level directory.
  13  *
  14  * Contributions after 2012-01-13 are licensed under the terms of the
  15  * GNU GPL, version 2 or (at your option) any later version.
  16  */
  17
  18 #include "qemu/config-file.h"
  19 #include "qemu/error-report.h"
  20 #include "sysemu/sysemu.h"
  21 #include "hw/i386/smbios.h"
  22 #include "hw/loader.h"
  23
  24 /*
  25  * Structures shared with the BIOS
  26  */
  27 struct smbios_header {
  28     uint16_t length;
  29     uint8_t type;
  30 } QEMU_PACKED;
  31
  32 struct smbios_field {
  33     struct smbios_header header;
  34     uint8_t type;
  35     uint16_t offset;
  36     uint8_t data[];
  37 } QEMU_PACKED;
  38
  39 struct smbios_table {
  40     struct smbios_header header;
  41     uint8_t data[];
  42 } QEMU_PACKED;
  43
  44 #define SMBIOS_FIELD_ENTRY 0
  45 #define SMBIOS_TABLE_ENTRY 1
  46
  47 static uint8_t *smbios_entries;
  48 static size_t smbios_entries_len;
  49 static int smbios_type4_count = 0;
  50 static bool smbios_immutable;
  51
  52 static struct {
  53     bool seen;
  54     int headertype;
  55     Location loc;
  56 } first_opt[2];
  57
  58 static struct {
  59     const char *vendor, *version, *date;
  60     bool have_major_minor;
  61     uint8_t major, minor;
  62 } type0;
  63
  64 static struct {
  65     const char *manufacturer, *product, *version, *serial, *sku, *family;
  66     /* uuid is in qemu_uuid[] */
  67 } type1;
  68
  69 static QemuOptsList qemu_smbios_opts = {
  70     .name = "smbios",
  71     .head = QTAILQ_HEAD_INITIALIZER(qemu_smbios_opts.head),
  72     .desc = {
  73         /*
  74          * no elements => accept any params
  75          * validation will happen later
  76          */
  77         { /* end of list */ }
  78     }
  79 };
  80
  81 static const QemuOptDesc qemu_smbios_file_opts[] = {
  82     {
  83         .name = "file",
  84         .type = QEMU_OPT_STRING,
  85         .help = "binary file containing an SMBIOS element",
  86     },
  87     { /* end of list */ }
  88 };
  89
  90 static const QemuOptDesc qemu_smbios_type0_opts[] = {
  91     {
  92         .name = "type",
  93         .type = QEMU_OPT_NUMBER,
  94         .help = "SMBIOS element type",
  95     },{
  96         .name = "vendor",
  97         .type = QEMU_OPT_STRING,
  98         .help = "vendor name",
  99     },{
 100         .name = "version",
 101         .type = QEMU_OPT_STRING,
 102         .help = "version number",
 103     },{
 104         .name = "date",
 105         .type = QEMU_OPT_STRING,
 106         .help = "release date",
 107     },{
 108         .name = "release",
 109         .type = QEMU_OPT_STRING,
 110         .help = "revision number",
 111     },
 112     { /* end of list */ }
 113 };
 114
 115 static const QemuOptDesc qemu_smbios_type1_opts[] = {
 116     {
 117         .name = "type",
 118         .type = QEMU_OPT_NUMBER,
 119         .help = "SMBIOS element type",
 120     },{
 121         .name = "manufacturer",
 122         .type = QEMU_OPT_STRING,
 123         .help = "manufacturer name",
 124     },{
 125         .name = "product",
 126         .type = QEMU_OPT_STRING,
 127         .help = "product name",
 128     },{
 129         .name = "version",
 130         .type = QEMU_OPT_STRING,
 131         .help = "version number",
 132     },{
 133         .name = "serial",
 134         .type = QEMU_OPT_STRING,
 135         .help = "serial number",
 136     },{
 137         .name = "uuid",
 138         .type = QEMU_OPT_STRING,
 139         .help = "UUID",
 140     },{
 141         .name = "sku",
 142         .type = QEMU_OPT_STRING,
 143         .help = "SKU number",
 144     },{
 145         .name = "family",
 146         .type = QEMU_OPT_STRING,
 147         .help = "family name",
 148     },
 149     { /* end of list */ }
 150 };
 151
 152 static void smbios_register_config(void)
 153 {
 154     qemu_add_opts(&qemu_smbios_opts);
 155 }
 156
 157 machine_init(smbios_register_config);
 158
 159 static void smbios_validate_table(void)
 160 {
 161     if (smbios_type4_count && smbios_type4_count != smp_cpus) {
 162         error_report("Number of SMBIOS Type 4 tables must match cpu count");
 163         exit(1);
 164     }
 165 }
 166
 167 /*
 168  * To avoid unresolvable overlaps in data, don't allow both
 169  * tables and fields for the same smbios type.
 170  */
 171 static void smbios_check_collision(int type, int entry)
 172 {
 173     if (type < ARRAY_SIZE(first_opt)) {
 174         if (first_opt[type].seen) {
 175             if (first_opt[type].headertype != entry) {
 176                 error_report("Can't mix file= and type= for same type");
 177                 loc_push_restore(&first_opt[type].loc);
 178                 error_report("This is the conflicting setting");
 179                 loc_pop(&first_opt[type].loc);
 180                 exit(1);
 181             }
 182         } else {
 183             first_opt[type].seen = true;
 184             first_opt[type].headertype = entry;
 185             loc_save(&first_opt[type].loc);
 186         }
 187     }
 188 }
 189
 190 static void smbios_add_field(int type, int offset, const void *data, size_t len)
 191 {
 192     struct smbios_field *field;
 193
 194     if (!smbios_entries) {
 195         smbios_entries_len = sizeof(uint16_t);
 196         smbios_entries = g_malloc0(smbios_entries_len);
 197     }
 198     smbios_entries = g_realloc(smbios_entries, smbios_entries_len +
 199                                                   sizeof(*field) + len);
 200     field = (struct smbios_field *)(smbios_entries + smbios_entries_len);
 201     field->header.type = SMBIOS_FIELD_ENTRY;
 202     field->header.length = cpu_to_le16(sizeof(*field) + len);
 203
 204     field->type = type;
 205     field->offset = cpu_to_le16(offset);
 206     memcpy(field->data, data, len);
 207
 208     smbios_entries_len += sizeof(*field) + len;
 209     (*(uint16_t *)smbios_entries) =
 210             cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1);
 211 }
 212
 213 static void smbios_maybe_add_str(int type, int offset, const char *data)
 214 {
 215     if (data) {
 216         smbios_add_field(type, offset, data, strlen(data) + 1);
 217     }
 218 }
 219
 220 static void smbios_build_type_0_fields(void)
 221 {
 222     smbios_maybe_add_str(0, offsetof(struct smbios_type_0, vendor_str),
 223                          type0.vendor);
 224     smbios_maybe_add_str(0, offsetof(struct smbios_type_0, bios_version_str),
 225                          type0.version);
 226     smbios_maybe_add_str(0, offsetof(struct smbios_type_0,
 227                                      bios_release_date_str),
 228                          type0.date);
 229     if (type0.have_major_minor) {
 230         smbios_add_field(0, offsetof(struct smbios_type_0,
 231                                      system_bios_major_release),
 232                          &type0.major, 1);
 233         smbios_add_field(0, offsetof(struct smbios_type_0,
 234                                      system_bios_minor_release),
 235                          &type0.minor, 1);
 236     }
 237 }
 238
 239 static void smbios_build_type_1_fields(void)
 240 {
 241     smbios_maybe_add_str(1, offsetof(struct smbios_type_1, manufacturer_str),
 242                          type1.manufacturer);
 243     smbios_maybe_add_str(1, offsetof(struct smbios_type_1, product_name_str),
 244                          type1.product);
 245     smbios_maybe_add_str(1, offsetof(struct smbios_type_1, version_str),
 246                          type1.version);
 247     smbios_maybe_add_str(1, offsetof(struct smbios_type_1, serial_number_str),
 248                          type1.serial);
 249     smbios_maybe_add_str(1, offsetof(struct smbios_type_1, sku_number_str),
 250                          type1.sku);
 251     smbios_maybe_add_str(1, offsetof(struct smbios_type_1, family_str),
 252                          type1.family);
 253     if (qemu_uuid_set) {
 254         smbios_add_field(1, offsetof(struct smbios_type_1, uuid),
 255                          qemu_uuid, 16);
 256     }
 257 }
 258
 259 uint8_t *smbios_get_table(size_t *length)
 260 {
 261     if (!smbios_immutable) {
 262         smbios_build_type_0_fields();
 263         smbios_build_type_1_fields();
 264         smbios_validate_table();
 265         smbios_immutable = true;
 266     }
 267     *length = smbios_entries_len;
 268     return smbios_entries;
 269 }
 270
 271 static void save_opt(const char **dest, QemuOpts *opts, const char *name)
 272 {
 273     const char *val = qemu_opt_get(opts, name);
 274
 275     if (val) {
 276         *dest = val;
 277     }
 278 }
 279
 280 void smbios_entry_add(QemuOpts *opts)
 281 {
 282     Error *local_err = NULL;
 283     const char *val;
 284
 285     assert(!smbios_immutable);
 286     val = qemu_opt_get(opts, "file");
 287     if (val) {
 288         struct smbios_structure_header *header;
 289         struct smbios_table *table;
 290         int size;
 291
 292         qemu_opts_validate(opts, qemu_smbios_file_opts, &local_err);
 293         if (local_err) {
 294             error_report("%s", error_get_pretty(local_err));
 295             exit(1);
 296         }
 297
 298         size = get_image_size(val);
 299         if (size == -1 || size < sizeof(struct smbios_structure_header)) {
 300             error_report("Cannot read SMBIOS file %s", val);
 301             exit(1);
 302         }
 303
 304         if (!smbios_entries) {
 305             smbios_entries_len = sizeof(uint16_t);
 306             smbios_entries = g_malloc0(smbios_entries_len);
 307         }
 308
 309         smbios_entries = g_realloc(smbios_entries, smbios_entries_len +
 310                                                       sizeof(*table) + size);
 311         table = (struct smbios_table *)(smbios_entries + smbios_entries_len);
 312         table->header.type = SMBIOS_TABLE_ENTRY;
 313         table->header.length = cpu_to_le16(sizeof(*table) + size);
 314
 315         if (load_image(val, table->data) != size) {
 316             error_report("Failed to load SMBIOS file %s", val);
 317             exit(1);
 318         }
 319
 320         header = (struct smbios_structure_header *)(table->data);
 321         smbios_check_collision(header->type, SMBIOS_TABLE_ENTRY);
 322         if (header->type == 4) {
 323             smbios_type4_count++;
 324         }
 325
 326         smbios_entries_len += sizeof(*table) + size;
 327         (*(uint16_t *)smbios_entries) =
 328                 cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1);
 329         return;
 330     }
 331
 332     val = qemu_opt_get(opts, "type");
 333     if (val) {
 334         unsigned long type = strtoul(val, NULL, 0);
 335
 336         smbios_check_collision(type, SMBIOS_FIELD_ENTRY);
 337
 338         switch (type) {
 339         case 0:
 340             qemu_opts_validate(opts, qemu_smbios_type0_opts, &local_err);
 341             if (local_err) {
 342                 error_report("%s", error_get_pretty(local_err));
 343                 exit(1);
 344             }
 345             save_opt(&type0.vendor, opts, "vendor");
 346             save_opt(&type0.version, opts, "version");
 347             save_opt(&type0.date, opts, "date");
 348
 349             val = qemu_opt_get(opts, "release");
 350             if (val) {
 351                 if (sscanf(val, "%hhu.%hhu", &type0.major, &type0.minor) != 2) {
 352                     error_report("Invalid release");
 353                     exit(1);
 354                 }
 355                 type0.have_major_minor = true;
 356             }
 357             return;
 358         case 1:
 359             qemu_opts_validate(opts, qemu_smbios_type1_opts, &local_err);
 360             if (local_err) {
 361                 error_report("%s", error_get_pretty(local_err));
 362                 exit(1);
 363             }
 364             save_opt(&type1.manufacturer, opts, "manufacturer");
 365             save_opt(&type1.product, opts, "product");
 366             save_opt(&type1.version, opts, "version");
 367             save_opt(&type1.serial, opts, "serial");
 368             save_opt(&type1.sku, opts, "sku");
 369             save_opt(&type1.family, opts, "family");
 370
 371             val = qemu_opt_get(opts, "uuid");
 372             if (val) {
 373                 if (qemu_uuid_parse(val, qemu_uuid) != 0) {
 374                     error_report("Invalid UUID");
 375                     exit(1);
 376                 }
 377                 qemu_uuid_set = true;
 378             }
 379             return;
 380         default:
 381             error_report("Don't know how to build fields for SMBIOS type %ld",
 382                          type);
 383             exit(1);
 384         }
 385     }
 386
 387     error_report("Must specify type= or file=");
 388     exit(1);
 389 }