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/*
* 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.
*
*/
#include "sysemu.h"
#include "smbios.h"
#include "loader.h"
/*
* Structures shared with the BIOS
*/
struct smbios_header {
uint16_t length;
uint8_t type;
} __attribute__((__packed__));
struct smbios_field {
struct smbios_header header;
uint8_t type;
uint16_t offset;
uint8_t data[];
} __attribute__((__packed__));
struct smbios_table {
struct smbios_header header;
uint8_t data[];
} __attribute__((__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) {
fprintf(stderr,
"Number of SMBIOS Type 4 tables must match cpu count.\n");
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) {
fprintf(stderr, "SMBIOS type %d field already defined, "
"cannot add table\n", 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) {
fprintf(stderr, "SMBIOS type %d table already defined, "
"cannot add field\n", type);
exit(1);
}
}
p += le16_to_cpu(header->length);
}
}
void smbios_add_field(int type, int offset, int len, void *data)
{
struct smbios_field *field;
smbios_check_collision(type, SMBIOS_FIELD_ENTRY);
if (!smbios_entries) {
smbios_entries_len = sizeof(uint16_t);
smbios_entries = qemu_mallocz(smbios_entries_len);
}
smbios_entries = qemu_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];
if (get_param_value(buf, sizeof(buf), "vendor", t))
smbios_add_field(0, offsetof(struct smbios_type_0, vendor_str),
strlen(buf) + 1, buf);
if (get_param_value(buf, sizeof(buf), "version", t))
smbios_add_field(0, offsetof(struct smbios_type_0, bios_version_str),
strlen(buf) + 1, buf);
if (get_param_value(buf, sizeof(buf), "date", t))
smbios_add_field(0, offsetof(struct smbios_type_0,
bios_release_date_str),
strlen(buf) + 1, buf);
if (get_param_value(buf, sizeof(buf), "release", t)) {
int major, minor;
sscanf(buf, "%d.%d", &major, &minor);
smbios_add_field(0, offsetof(struct smbios_type_0,
system_bios_major_release), 1, &major);
smbios_add_field(0, offsetof(struct smbios_type_0,
system_bios_minor_release), 1, &minor);
}
}
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),
strlen(buf) + 1, buf);
if (get_param_value(buf, sizeof(buf), "product", t))
smbios_add_field(1, offsetof(struct smbios_type_1, product_name_str),
strlen(buf) + 1, buf);
if (get_param_value(buf, sizeof(buf), "version", t))
smbios_add_field(1, offsetof(struct smbios_type_1, version_str),
strlen(buf) + 1, buf);
if (get_param_value(buf, sizeof(buf), "serial", t))
smbios_add_field(1, offsetof(struct smbios_type_1, serial_number_str),
strlen(buf) + 1, buf);
if (get_param_value(buf, sizeof(buf), "uuid", t)) {
if (qemu_uuid_parse(buf, qemu_uuid) != 0) {
fprintf(stderr, "Invalid SMBIOS UUID string\n");
exit(1);
}
}
if (get_param_value(buf, sizeof(buf), "sku", t))
smbios_add_field(1, offsetof(struct smbios_type_1, sku_number_str),
strlen(buf) + 1, buf);
if (get_param_value(buf, sizeof(buf), "family", t))
smbios_add_field(1, offsetof(struct smbios_type_1, family_str),
strlen(buf) + 1, buf);
}
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)) {
fprintf(stderr, "Cannot read smbios file %s\n", buf);
exit(1);
}
if (!smbios_entries) {
smbios_entries_len = sizeof(uint16_t);
smbios_entries = qemu_mallocz(smbios_entries_len);
}
smbios_entries = qemu_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) {
fprintf(stderr, "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:
fprintf(stderr, "Don't know how to build fields for SMBIOS type "
"%ld\n", type);
exit(1);
}
}
fprintf(stderr, "smbios: must specify type= or file=\n");
return -1;
}
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