/* * SMBIOS Support * * Copyright (C) 2009 Hewlett-Packard Development Company, L.P. * * Authors: * Alex Williamson <alex.williamson@hp.com> * * This work is licensed under the terms of the GNU GPL, version 2. See * the COPYING file in the top-level directory. * * Contributions after 2012-01-13 are licensed under the terms of the * GNU GPL, version 2 or (at your option) any later version. */ #include "qemu/error-report.h" #include "sysemu/sysemu.h" #include "hw/i386/smbios.h" #include "hw/loader.h" /* * Structures shared with the BIOS */ struct smbios_header { uint16_t length; uint8_t type; } QEMU_PACKED; struct smbios_field { struct smbios_header header; uint8_t type; uint16_t offset; uint8_t data[]; } QEMU_PACKED; struct smbios_table { struct smbios_header header; uint8_t data[]; } QEMU_PACKED; #define SMBIOS_FIELD_ENTRY 0 #define SMBIOS_TABLE_ENTRY 1 static uint8_t *smbios_entries; static size_t smbios_entries_len; static int smbios_type4_count = 0; static void smbios_validate_table(void) { if (smbios_type4_count && smbios_type4_count != smp_cpus) { error_report("Number of SMBIOS Type 4 tables must match cpu count"); exit(1); } } uint8_t *smbios_get_table(size_t *length) { smbios_validate_table(); *length = smbios_entries_len; return smbios_entries; } /* * To avoid unresolvable overlaps in data, don't allow both * tables and fields for the same smbios type. */ static void smbios_check_collision(int type, int entry) { uint16_t *num_entries = (uint16_t *)smbios_entries; struct smbios_header *header; char *p; int i; if (!num_entries) return; p = (char *)(num_entries + 1); for (i = 0; i < *num_entries; i++) { header = (struct smbios_header *)p; if (entry == SMBIOS_TABLE_ENTRY && header->type == SMBIOS_FIELD_ENTRY) { struct smbios_field *field = (void *)header; if (type == field->type) { error_report("SMBIOS type %d field already defined, " "cannot add table", type); exit(1); } } else if (entry == SMBIOS_FIELD_ENTRY && header->type == SMBIOS_TABLE_ENTRY) { struct smbios_structure_header *table = (void *)(header + 1); if (type == table->type) { error_report("SMBIOS type %d table already defined, " "cannot add field", type); exit(1); } } p += le16_to_cpu(header->length); } } void smbios_add_field(int type, int offset, const void *data, size_t len) { struct smbios_field *field; smbios_check_collision(type, SMBIOS_FIELD_ENTRY); if (!smbios_entries) { smbios_entries_len = sizeof(uint16_t); smbios_entries = g_malloc0(smbios_entries_len); } smbios_entries = g_realloc(smbios_entries, smbios_entries_len + sizeof(*field) + len); field = (struct smbios_field *)(smbios_entries + smbios_entries_len); field->header.type = SMBIOS_FIELD_ENTRY; field->header.length = cpu_to_le16(sizeof(*field) + len); field->type = type; field->offset = cpu_to_le16(offset); memcpy(field->data, data, len); smbios_entries_len += sizeof(*field) + len; (*(uint16_t *)smbios_entries) = cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1); } static void smbios_build_type_0_fields(const char *t) { char buf[1024]; unsigned char major, minor; if (get_param_value(buf, sizeof(buf), "vendor", t)) smbios_add_field(0, offsetof(struct smbios_type_0, vendor_str), buf, strlen(buf) + 1); if (get_param_value(buf, sizeof(buf), "version", t)) smbios_add_field(0, offsetof(struct smbios_type_0, bios_version_str), buf, strlen(buf) + 1); if (get_param_value(buf, sizeof(buf), "date", t)) smbios_add_field(0, offsetof(struct smbios_type_0, bios_release_date_str), buf, strlen(buf) + 1); if (get_param_value(buf, sizeof(buf), "release", t)) { if (sscanf(buf, "%hhu.%hhu", &major, &minor) != 2) { error_report("Invalid release"); exit(1); } smbios_add_field(0, offsetof(struct smbios_type_0, system_bios_major_release), &major, 1); smbios_add_field(0, offsetof(struct smbios_type_0, system_bios_minor_release), &minor, 1); } } static void smbios_build_type_1_fields(const char *t) { char buf[1024]; if (get_param_value(buf, sizeof(buf), "manufacturer", t)) smbios_add_field(1, offsetof(struct smbios_type_1, manufacturer_str), buf, strlen(buf) + 1); if (get_param_value(buf, sizeof(buf), "product", t)) smbios_add_field(1, offsetof(struct smbios_type_1, product_name_str), buf, strlen(buf) + 1); if (get_param_value(buf, sizeof(buf), "version", t)) smbios_add_field(1, offsetof(struct smbios_type_1, version_str), buf, strlen(buf) + 1); if (get_param_value(buf, sizeof(buf), "serial", t)) smbios_add_field(1, offsetof(struct smbios_type_1, serial_number_str), buf, strlen(buf) + 1); if (get_param_value(buf, sizeof(buf), "uuid", t)) { if (qemu_uuid_parse(buf, qemu_uuid) != 0) { error_report("Invalid UUID"); exit(1); } } if (get_param_value(buf, sizeof(buf), "sku", t)) smbios_add_field(1, offsetof(struct smbios_type_1, sku_number_str), buf, strlen(buf) + 1); if (get_param_value(buf, sizeof(buf), "family", t)) smbios_add_field(1, offsetof(struct smbios_type_1, family_str), buf, strlen(buf) + 1); } int smbios_entry_add(const char *t) { char buf[1024]; if (get_param_value(buf, sizeof(buf), "file", t)) { struct smbios_structure_header *header; struct smbios_table *table; int size = get_image_size(buf); if (size == -1 || size < sizeof(struct smbios_structure_header)) { error_report("Cannot read SMBIOS file %s", buf); exit(1); } if (!smbios_entries) { smbios_entries_len = sizeof(uint16_t); smbios_entries = g_malloc0(smbios_entries_len); } smbios_entries = g_realloc(smbios_entries, smbios_entries_len + sizeof(*table) + size); table = (struct smbios_table *)(smbios_entries + smbios_entries_len); table->header.type = SMBIOS_TABLE_ENTRY; table->header.length = cpu_to_le16(sizeof(*table) + size); if (load_image(buf, table->data) != size) { error_report("Failed to load SMBIOS file %s", buf); exit(1); } header = (struct smbios_structure_header *)(table->data); smbios_check_collision(header->type, SMBIOS_TABLE_ENTRY); if (header->type == 4) { smbios_type4_count++; } smbios_entries_len += sizeof(*table) + size; (*(uint16_t *)smbios_entries) = cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1); return 0; } if (get_param_value(buf, sizeof(buf), "type", t)) { unsigned long type = strtoul(buf, NULL, 0); switch (type) { case 0: smbios_build_type_0_fields(t); return 0; case 1: smbios_build_type_1_fields(t); return 0; default: error_report("Don't know how to build fields for SMBIOS type %ld", type); exit(1); } } error_report("Must specify type= or file="); return -1; }