242 lines
7.8 KiB
C
242 lines
7.8 KiB
C
/*
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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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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include "sysemu/sysemu.h"
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#include "hw/smbios.h"
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#include "hw/loader.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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} QEMU_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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} QEMU_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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} QEMU_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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static int smbios_type4_count = 0;
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static void smbios_validate_table(void)
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{
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if (smbios_type4_count && smbios_type4_count != smp_cpus) {
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fprintf(stderr,
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"Number of SMBIOS Type 4 tables must match cpu count.\n");
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exit(1);
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}
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}
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uint8_t *smbios_get_table(size_t *length)
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{
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smbios_validate_table();
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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 = g_malloc0(smbios_entries_len);
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}
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smbios_entries = g_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 == -1 || size < sizeof(struct smbios_structure_header)) {
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fprintf(stderr, "Cannot read smbios file %s\n", 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 = g_malloc0(smbios_entries_len);
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}
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smbios_entries = g_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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if (header->type == 4) {
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smbios_type4_count++;
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}
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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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}
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