1 /* 2 * SMBIOS Support 3 * 4 * Copyright (C) 2009 Hewlett-Packard Development Company, L.P. 5 * 6 * Authors: 7 * Alex Williamson <alex.williamson (at) hp.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2. See 10 * the COPYING file in the top-level directory. 11 * 12 */ 13 14 #include "sysemu.h" 15 #include "smbios.h" 16 17 /* 18 * Structures shared with the BIOS 19 */ 20 struct smbios_header { 21 uint16_t length; 22 uint8_t type; 23 } __attribute__((__packed__)); 24 25 struct smbios_field { 26 struct smbios_header header; 27 uint8_t type; 28 uint16_t offset; 29 uint8_t data[]; 30 } __attribute__((__packed__)); 31 32 struct smbios_table { 33 struct smbios_header header; 34 uint8_t data[]; 35 } __attribute__((__packed__)); 36 37 #define SMBIOS_FIELD_ENTRY 0 38 #define SMBIOS_TABLE_ENTRY 1 39 40 41 static uint8_t *smbios_entries; 42 static size_t smbios_entries_len; 43 44 uint8_t *smbios_get_table(size_t *length) 45 { 46 *length = smbios_entries_len; 47 return smbios_entries; 48 } 49 50 /* 51 * To avoid unresolvable overlaps in data, don't allow both 52 * tables and fields for the same smbios type. 53 */ 54 static void smbios_check_collision(int type, int entry) 55 { 56 uint16_t *num_entries = (uint16_t *)smbios_entries; 57 struct smbios_header *header; 58 char *p; 59 int i; 60 61 if (!num_entries) 62 return; 63 64 p = (char *)(num_entries + 1); 65 66 for (i = 0; i < *num_entries; i++) { 67 header = (struct smbios_header *)p; 68 if (entry == SMBIOS_TABLE_ENTRY && header->type == SMBIOS_FIELD_ENTRY) { 69 struct smbios_field *field = (void *)header; 70 if (type == field->type) { 71 fprintf(stderr, "SMBIOS type %d field already defined, " 72 "cannot add table\n", type); 73 exit(1); 74 } 75 } else if (entry == SMBIOS_FIELD_ENTRY && 76 header->type == SMBIOS_TABLE_ENTRY) { 77 struct smbios_structure_header *table = (void *)(header + 1); 78 if (type == table->type) { 79 fprintf(stderr, "SMBIOS type %d table already defined, " 80 "cannot add field\n", type); 81 exit(1); 82 } 83 } 84 p += le16_to_cpu(header->length); 85 } 86 } 87 88 void smbios_add_field(int type, int offset, int len, void *data) 89 { 90 struct smbios_field *field; 91 92 smbios_check_collision(type, SMBIOS_FIELD_ENTRY); 93 94 if (!smbios_entries) { 95 smbios_entries_len = sizeof(uint16_t); 96 smbios_entries = qemu_mallocz(smbios_entries_len); 97 } 98 smbios_entries = qemu_realloc(smbios_entries, smbios_entries_len + 99 sizeof(*field) + len); 100 field = (struct smbios_field *)(smbios_entries + smbios_entries_len); 101 field->header.type = SMBIOS_FIELD_ENTRY; 102 field->header.length = cpu_to_le16(sizeof(*field) + len); 103 104 field->type = type; 105 field->offset = cpu_to_le16(offset); 106 memcpy(field->data, data, len); 107 108 smbios_entries_len += sizeof(*field) + len; 109 (*(uint16_t *)smbios_entries) = 110 cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1); 111 } 112 113 static void smbios_build_type_0_fields(const char *t) 114 { 115 char buf[1024]; 116 117 if (get_param_value(buf, sizeof(buf), "vendor", t)) 118 smbios_add_field(0, offsetof(struct smbios_type_0, vendor_str), 119 strlen(buf) + 1, buf); 120 if (get_param_value(buf, sizeof(buf), "version", t)) 121 smbios_add_field(0, offsetof(struct smbios_type_0, bios_version_str), 122 strlen(buf) + 1, buf); 123 if (get_param_value(buf, sizeof(buf), "date", t)) 124 smbios_add_field(0, offsetof(struct smbios_type_0, 125 bios_release_date_str), 126 strlen(buf) + 1, buf); 127 if (get_param_value(buf, sizeof(buf), "release", t)) { 128 int major, minor; 129 sscanf(buf, "%d.%d", &major, &minor); 130 smbios_add_field(0, offsetof(struct smbios_type_0, 131 system_bios_major_release), 1, &major); 132 smbios_add_field(0, offsetof(struct smbios_type_0, 133 system_bios_minor_release), 1, &minor); 134 } 135 } 136 137 static void smbios_build_type_1_fields(const char *t) 138 { 139 char buf[1024]; 140 141 if (get_param_value(buf, sizeof(buf), "manufacturer", t)) 142 smbios_add_field(1, offsetof(struct smbios_type_1, manufacturer_str), 143 strlen(buf) + 1, buf); 144 if (get_param_value(buf, sizeof(buf), "product", t)) 145 smbios_add_field(1, offsetof(struct smbios_type_1, product_name_str), 146 strlen(buf) + 1, buf); 147 if (get_param_value(buf, sizeof(buf), "version", t)) 148 smbios_add_field(1, offsetof(struct smbios_type_1, version_str), 149 strlen(buf) + 1, buf); 150 if (get_param_value(buf, sizeof(buf), "serial", t)) 151 smbios_add_field(1, offsetof(struct smbios_type_1, serial_number_str), 152 strlen(buf) + 1, buf); 153 if (get_param_value(buf, sizeof(buf), "uuid", t)) { 154 if (qemu_uuid_parse(buf, qemu_uuid) != 0) { 155 fprintf(stderr, "Invalid SMBIOS UUID string\n"); 156 exit(1); 157 } 158 } 159 if (get_param_value(buf, sizeof(buf), "sku", t)) 160 smbios_add_field(1, offsetof(struct smbios_type_1, sku_number_str), 161 strlen(buf) + 1, buf); 162 if (get_param_value(buf, sizeof(buf), "family", t)) 163 smbios_add_field(1, offsetof(struct smbios_type_1, family_str), 164 strlen(buf) + 1, buf); 165 } 166 167 int smbios_entry_add(const char *t) 168 { 169 char buf[1024]; 170 171 if (get_param_value(buf, sizeof(buf), "file", t)) { 172 struct smbios_structure_header *header; 173 struct smbios_table *table; 174 int size = get_image_size(buf); 175 176 if (size < sizeof(struct smbios_structure_header)) { 177 fprintf(stderr, "Cannot read smbios file %s", buf); 178 exit(1); 179 } 180 181 if (!smbios_entries) { 182 smbios_entries_len = sizeof(uint16_t); 183 smbios_entries = qemu_mallocz(smbios_entries_len); 184 } 185 186 smbios_entries = qemu_realloc(smbios_entries, smbios_entries_len + 187 sizeof(*table) + size); 188 table = (struct smbios_table *)(smbios_entries + smbios_entries_len); 189 table->header.type = SMBIOS_TABLE_ENTRY; 190 table->header.length = cpu_to_le16(sizeof(*table) + size); 191 192 if (load_image(buf, table->data) != size) { 193 fprintf(stderr, "Failed to load smbios file %s", buf); 194 exit(1); 195 } 196 197 header = (struct smbios_structure_header *)(table->data); 198 smbios_check_collision(header->type, SMBIOS_TABLE_ENTRY); 199 200 smbios_entries_len += sizeof(*table) + size; 201 (*(uint16_t *)smbios_entries) = 202 cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1); 203 return 0; 204 } 205 206 if (get_param_value(buf, sizeof(buf), "type", t)) { 207 unsigned long type = strtoul(buf, NULL, 0); 208 switch (type) { 209 case 0: 210 smbios_build_type_0_fields(t); 211 return 0; 212 case 1: 213 smbios_build_type_1_fields(t); 214 return 0; 215 default: 216 fprintf(stderr, "Don't know how to build fields for SMBIOS type " 217 "%ld\n", type); 218 exit(1); 219 } 220 } 221 222 fprintf(stderr, "smbios: must specify type= or file=\n"); 223 return -1; 224 } 225
