root / hw / smbios.c @ 8d13fcc0
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/*
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* SMBIOS Support
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*
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* Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
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*
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* Authors:
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* Alex Williamson <alex.williamson@hp.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include "sysemu.h" |
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#include "smbios.h" |
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/*
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* Structures shared with the BIOS
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*/
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struct smbios_header {
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uint16_t length; |
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uint8_t type; |
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} __attribute__((__packed__)); |
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struct smbios_field {
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struct smbios_header header;
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uint8_t type; |
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uint16_t offset; |
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uint8_t data[]; |
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} __attribute__((__packed__)); |
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struct smbios_table {
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struct smbios_header header;
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uint8_t data[]; |
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} __attribute__((__packed__)); |
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#define SMBIOS_FIELD_ENTRY 0 |
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#define SMBIOS_TABLE_ENTRY 1 |
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static uint8_t *smbios_entries;
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static size_t smbios_entries_len;
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uint8_t *smbios_get_table(size_t *length) |
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{ |
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*length = smbios_entries_len; |
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return smbios_entries;
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} |
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/*
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* To avoid unresolvable overlaps in data, don't allow both
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* tables and fields for the same smbios type.
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*/
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static void smbios_check_collision(int type, int entry) |
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{ |
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uint16_t *num_entries = (uint16_t *)smbios_entries; |
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struct smbios_header *header;
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char *p;
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int i;
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if (!num_entries)
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return;
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p = (char *)(num_entries + 1); |
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for (i = 0; i < *num_entries; i++) { |
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header = (struct smbios_header *)p;
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if (entry == SMBIOS_TABLE_ENTRY && header->type == SMBIOS_FIELD_ENTRY) {
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struct smbios_field *field = (void *)header; |
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if (type == field->type) {
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fprintf(stderr, "SMBIOS type %d field already defined, "
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"cannot add table\n", type);
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exit(1);
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} |
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} else if (entry == SMBIOS_FIELD_ENTRY && |
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header->type == SMBIOS_TABLE_ENTRY) { |
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struct smbios_structure_header *table = (void *)(header + 1); |
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if (type == table->type) {
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fprintf(stderr, "SMBIOS type %d table already defined, "
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"cannot add field\n", type);
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exit(1);
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} |
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} |
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p += le16_to_cpu(header->length); |
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} |
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} |
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void smbios_add_field(int type, int offset, int len, void *data) |
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{ |
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struct smbios_field *field;
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smbios_check_collision(type, SMBIOS_FIELD_ENTRY); |
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if (!smbios_entries) {
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smbios_entries_len = sizeof(uint16_t);
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smbios_entries = qemu_mallocz(smbios_entries_len); |
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} |
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smbios_entries = qemu_realloc(smbios_entries, smbios_entries_len + |
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sizeof(*field) + len);
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field = (struct smbios_field *)(smbios_entries + smbios_entries_len);
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field->header.type = SMBIOS_FIELD_ENTRY; |
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field->header.length = cpu_to_le16(sizeof(*field) + len);
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field->type = type; |
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field->offset = cpu_to_le16(offset); |
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memcpy(field->data, data, len); |
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smbios_entries_len += sizeof(*field) + len;
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(*(uint16_t *)smbios_entries) = |
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cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1);
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} |
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static void smbios_build_type_0_fields(const char *t) |
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{ |
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char buf[1024]; |
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if (get_param_value(buf, sizeof(buf), "vendor", t)) |
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smbios_add_field(0, offsetof(struct smbios_type_0, vendor_str), |
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strlen(buf) + 1, buf);
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if (get_param_value(buf, sizeof(buf), "version", t)) |
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smbios_add_field(0, offsetof(struct smbios_type_0, bios_version_str), |
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strlen(buf) + 1, buf);
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if (get_param_value(buf, sizeof(buf), "date", t)) |
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smbios_add_field(0, offsetof(struct smbios_type_0, |
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bios_release_date_str), |
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strlen(buf) + 1, buf);
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if (get_param_value(buf, sizeof(buf), "release", t)) { |
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int major, minor;
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sscanf(buf, "%d.%d", &major, &minor);
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smbios_add_field(0, offsetof(struct smbios_type_0, |
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system_bios_major_release), 1, &major);
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smbios_add_field(0, offsetof(struct smbios_type_0, |
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system_bios_minor_release), 1, &minor);
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} |
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} |
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static void smbios_build_type_1_fields(const char *t) |
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{ |
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char buf[1024]; |
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if (get_param_value(buf, sizeof(buf), "manufacturer", t)) |
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smbios_add_field(1, offsetof(struct smbios_type_1, manufacturer_str), |
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strlen(buf) + 1, buf);
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if (get_param_value(buf, sizeof(buf), "product", t)) |
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smbios_add_field(1, offsetof(struct smbios_type_1, product_name_str), |
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strlen(buf) + 1, buf);
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if (get_param_value(buf, sizeof(buf), "version", t)) |
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smbios_add_field(1, offsetof(struct smbios_type_1, version_str), |
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strlen(buf) + 1, buf);
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if (get_param_value(buf, sizeof(buf), "serial", t)) |
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smbios_add_field(1, offsetof(struct smbios_type_1, serial_number_str), |
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strlen(buf) + 1, buf);
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if (get_param_value(buf, sizeof(buf), "uuid", t)) { |
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if (qemu_uuid_parse(buf, qemu_uuid) != 0) { |
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fprintf(stderr, "Invalid SMBIOS UUID string\n");
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exit(1);
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} |
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} |
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if (get_param_value(buf, sizeof(buf), "sku", t)) |
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smbios_add_field(1, offsetof(struct smbios_type_1, sku_number_str), |
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strlen(buf) + 1, buf);
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if (get_param_value(buf, sizeof(buf), "family", t)) |
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smbios_add_field(1, offsetof(struct smbios_type_1, family_str), |
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strlen(buf) + 1, buf);
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} |
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int smbios_entry_add(const char *t) |
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{ |
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char buf[1024]; |
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if (get_param_value(buf, sizeof(buf), "file", t)) { |
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struct smbios_structure_header *header;
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struct smbios_table *table;
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int size = get_image_size(buf);
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if (size < sizeof(struct smbios_structure_header)) { |
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fprintf(stderr, "Cannot read smbios file %s", buf);
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exit(1);
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} |
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if (!smbios_entries) {
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smbios_entries_len = sizeof(uint16_t);
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smbios_entries = qemu_mallocz(smbios_entries_len); |
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} |
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smbios_entries = qemu_realloc(smbios_entries, smbios_entries_len + |
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sizeof(*table) + size);
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table = (struct smbios_table *)(smbios_entries + smbios_entries_len);
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table->header.type = SMBIOS_TABLE_ENTRY; |
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table->header.length = cpu_to_le16(sizeof(*table) + size);
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if (load_image(buf, table->data) != size) {
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fprintf(stderr, "Failed to load smbios file %s", buf);
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exit(1);
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} |
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header = (struct smbios_structure_header *)(table->data);
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smbios_check_collision(header->type, SMBIOS_TABLE_ENTRY); |
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smbios_entries_len += sizeof(*table) + size;
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(*(uint16_t *)smbios_entries) = |
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cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1);
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return 0; |
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} |
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if (get_param_value(buf, sizeof(buf), "type", t)) { |
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unsigned long type = strtoul(buf, NULL, 0); |
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switch (type) {
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case 0: |
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smbios_build_type_0_fields(t); |
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return 0; |
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case 1: |
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smbios_build_type_1_fields(t); |
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return 0; |
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default:
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fprintf(stderr, "Don't know how to build fields for SMBIOS type "
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"%ld\n", type);
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exit(1);
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} |
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} |
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fprintf(stderr, "smbios: must specify type= or file=\n");
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return -1; |
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} |