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/*
* SMBIOS legacy support
*
* Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
* Copyright (C) 2013 Red Hat, Inc.
*
* Authors:
* Alex Williamson <alex.williamson@hp.com>
* Markus Armbruster <armbru@redhat.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/osdep.h"
#include "qemu/bswap.h"
#include "hw/firmware/smbios.h"
#include "system/system.h"
#include "qapi/error.h"
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;
GArray *usr_blobs_sizes;
void smbios_add_usr_blob_size(size_t size)
{
if (!usr_blobs_sizes) {
usr_blobs_sizes = g_array_new(false, false, sizeof(size_t));
}
g_array_append_val(usr_blobs_sizes, size);
}
static void smbios_add_field(int type, int offset, const void *data, size_t len)
{
struct smbios_field *field;
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_maybe_add_str(int type, int offset, const char *data)
{
if (data) {
smbios_add_field(type, offset, data, strlen(data) + 1);
}
}
static void smbios_build_type_0_fields(void)
{
smbios_maybe_add_str(0, offsetof(struct smbios_type_0, vendor_str),
smbios_type0.vendor);
smbios_maybe_add_str(0, offsetof(struct smbios_type_0, bios_version_str),
smbios_type0.version);
smbios_maybe_add_str(0, offsetof(struct smbios_type_0,
bios_release_date_str),
smbios_type0.date);
if (smbios_type0.have_major_minor) {
smbios_add_field(0, offsetof(struct smbios_type_0,
system_bios_major_release),
&smbios_type0.major, 1);
smbios_add_field(0, offsetof(struct smbios_type_0,
system_bios_minor_release),
&smbios_type0.minor, 1);
}
}
static void smbios_build_type_1_fields(void)
{
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, manufacturer_str),
smbios_type1.manufacturer);
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, product_name_str),
smbios_type1.product);
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, version_str),
smbios_type1.version);
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, serial_number_str),
smbios_type1.serial);
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, sku_number_str),
smbios_type1.sku);
smbios_maybe_add_str(1, offsetof(struct smbios_type_1, family_str),
smbios_type1.family);
if (qemu_uuid_set) {
/*
* We don't encode the UUID in the "wire format" here because this
* function is for legacy mode and needs to keep the guest ABI, and
* because we don't know what's the SMBIOS version advertised by the
* BIOS.
*/
smbios_add_field(1, offsetof(struct smbios_type_1, uuid),
&qemu_uuid, 16);
}
}
uint8_t *smbios_get_table_legacy(size_t *length, Error **errp)
{
int i;
size_t usr_offset;
/* complain if fields were given for types > 1 */
if (find_next_bit(smbios_have_fields_bitmap,
SMBIOS_MAX_TYPE + 1, 2) < SMBIOS_MAX_TYPE + 1) {
error_setg(errp, "can't process fields for smbios "
"types > 1 on machine versions < 2.1!");
goto err_exit;
}
if (test_bit(4, smbios_have_binfile_bitmap)) {
error_setg(errp, "can't process table for smbios "
"type 4 on machine versions < 2.1!");
goto err_exit;
}
g_free(smbios_entries);
smbios_entries_len = sizeof(uint16_t);
smbios_entries = g_malloc0(smbios_entries_len);
/*
* build a set of legacy smbios_table entries using user provided blobs
*/
for (i = 0, usr_offset = 0; usr_blobs_sizes && i < usr_blobs_sizes->len;
i++)
{
struct smbios_table *table;
struct smbios_structure_header *header;
size_t size = g_array_index(usr_blobs_sizes, size_t, i);
header = (struct smbios_structure_header *)(usr_blobs + usr_offset);
smbios_entries = g_realloc(smbios_entries, smbios_entries_len +
size + sizeof(*table));
table = (struct smbios_table *)(smbios_entries + smbios_entries_len);
table->header.type = SMBIOS_TABLE_ENTRY;
table->header.length = cpu_to_le16(sizeof(*table) + size);
memcpy(table->data, header, size);
smbios_entries_len += sizeof(*table) + size;
/*
* update number of entries in the blob,
* see SeaBIOS: qemu_cfg_legacy():QEMU_CFG_SMBIOS_ENTRIES
*/
(*(uint16_t *)smbios_entries) =
cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1);
usr_offset += size;
}
smbios_build_type_0_fields();
smbios_build_type_1_fields();
if (!smbios_validate_table(SMBIOS_ENTRY_POINT_TYPE_32, errp)) {
goto err_exit;
}
*length = smbios_entries_len;
return smbios_entries;
err_exit:
g_free(smbios_entries);
return NULL;
}
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