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qemu/include/hw/firmware/smbios.h
Vincent Bernat 05dfb447a4 hw/smbios: support for type 41 (onboard devices extended information) 
Type 41 defines the attributes of devices that are onboard. The
original intent was to imply the BIOS had some level of control over
the enablement of the associated devices.

If network devices are present in this table, by default, udev will
name the corresponding interfaces enoX, X being the instance number.
Without such information, udev will fallback to using the PCI ID and
this usually gives ens3 or ens4. This can be a bit annoying as the
name of the network card may depend on the order of options and may
change if a new PCI device is added earlier on the commande line.
Being able to provide SMBIOS type 41 entry ensure the name of the
interface won't change and helps the user guess the right name without
booting a first time.

This can be invoked with:

    $QEMU -netdev user,id=internet
          -device virtio-net-pci,mac=50:54:00:00:00:42,netdev=internet,id=internet-dev \
          -smbios type=41,designation='Onboard LAN',instance=1,kind=ethernet,pcidev=internet-dev

The PCI segment is assumed to be 0. This should hold true for most
cases.

    $ dmidecode -t 41
    # dmidecode 3.3
    Getting SMBIOS data from sysfs.
    SMBIOS 2.8 present.

    Handle 0x2900, DMI type 41, 11 bytes
    Onboard Device
            Reference Designation: Onboard LAN
            Type: Ethernet
            Status: Enabled
            Type Instance: 1
            Bus Address: 0000:00:09.0

    $ ip -brief a
    lo               UNKNOWN        127.0.0.1/8 ::1/128
    eno1             UP             10.0.2.14/24 fec0::5254:ff:fe00:42/64 fe80::5254:ff:fe00:42/64

Signed-off-by: Vincent Bernat <vincent@bernat.ch>
Message-Id: <20210401171138.62970-1-vincent@bernat.ch>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-05-14 10:26:18 -04:00

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#ifndef QEMU_SMBIOS_H
#define QEMU_SMBIOS_H
/*
* 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.
*
*/
#define SMBIOS_MAX_TYPE 127
/* memory area description, used by type 19 table */
struct smbios_phys_mem_area {
uint64_t address;
uint64_t length;
};
/*
* SMBIOS spec defined tables
*/
typedef enum SmbiosEntryPointType {
SMBIOS_ENTRY_POINT_21,
SMBIOS_ENTRY_POINT_30,
} SmbiosEntryPointType;
/* SMBIOS Entry Point
* There are two types of entry points defined in the SMBIOS specification
* (see below). BIOS must place the entry point(s) at a 16-byte-aligned
* address between 0xf0000 and 0xfffff. Note that either entry point type
* can be used in a 64-bit target system, except that SMBIOS 2.1 entry point
* only allows the SMBIOS struct table to reside below 4GB address space.
*/
/* SMBIOS 2.1 (32-bit) Entry Point
* - introduced since SMBIOS 2.1
* - supports structure table below 4GB only
*/
struct smbios_21_entry_point {
uint8_t anchor_string[4];
uint8_t checksum;
uint8_t length;
uint8_t smbios_major_version;
uint8_t smbios_minor_version;
uint16_t max_structure_size;
uint8_t entry_point_revision;
uint8_t formatted_area[5];
uint8_t intermediate_anchor_string[5];
uint8_t intermediate_checksum;
uint16_t structure_table_length;
uint32_t structure_table_address;
uint16_t number_of_structures;
uint8_t smbios_bcd_revision;
} QEMU_PACKED;
/* SMBIOS 3.0 (64-bit) Entry Point
* - introduced since SMBIOS 3.0
* - supports structure table at 64-bit address space
*/
struct smbios_30_entry_point {
uint8_t anchor_string[5];
uint8_t checksum;
uint8_t length;
uint8_t smbios_major_version;
uint8_t smbios_minor_version;
uint8_t smbios_doc_rev;
uint8_t entry_point_revision;
uint8_t reserved;
uint32_t structure_table_max_size;
uint64_t structure_table_address;
} QEMU_PACKED;
typedef union {
struct smbios_21_entry_point ep21;
struct smbios_30_entry_point ep30;
} QEMU_PACKED SmbiosEntryPoint;
/* This goes at the beginning of every SMBIOS structure. */
struct smbios_structure_header {
uint8_t type;
uint8_t length;
uint16_t handle;
} QEMU_PACKED;
/* SMBIOS type 0 - BIOS Information */
struct smbios_type_0 {
struct smbios_structure_header header;
uint8_t vendor_str;
uint8_t bios_version_str;
uint16_t bios_starting_address_segment;
uint8_t bios_release_date_str;
uint8_t bios_rom_size;
uint64_t bios_characteristics;
uint8_t bios_characteristics_extension_bytes[2];
uint8_t system_bios_major_release;
uint8_t system_bios_minor_release;
uint8_t embedded_controller_major_release;
uint8_t embedded_controller_minor_release;
} QEMU_PACKED;
/* UUID encoding. The time_* fields are little-endian, as specified by SMBIOS
* version 2.6.
*/
struct smbios_uuid {
uint32_t time_low;
uint16_t time_mid;
uint16_t time_hi_and_version;
uint8_t clock_seq_hi_and_reserved;
uint8_t clock_seq_low;
uint8_t node[6];
} QEMU_PACKED;
/* SMBIOS type 1 - System Information */
struct smbios_type_1 {
struct smbios_structure_header header;
uint8_t manufacturer_str;
uint8_t product_name_str;
uint8_t version_str;
uint8_t serial_number_str;
struct smbios_uuid uuid;
uint8_t wake_up_type;
uint8_t sku_number_str;
uint8_t family_str;
} QEMU_PACKED;
/* SMBIOS type 2 - Base Board */
struct smbios_type_2 {
struct smbios_structure_header header;
uint8_t manufacturer_str;
uint8_t product_str;
uint8_t version_str;
uint8_t serial_number_str;
uint8_t asset_tag_number_str;
uint8_t feature_flags;
uint8_t location_str;
uint16_t chassis_handle;
uint8_t board_type;
uint8_t contained_element_count;
/* contained elements follow */
} QEMU_PACKED;
/* SMBIOS type 3 - System Enclosure (v2.7) */
struct smbios_type_3 {
struct smbios_structure_header header;
uint8_t manufacturer_str;
uint8_t type;
uint8_t version_str;
uint8_t serial_number_str;
uint8_t asset_tag_number_str;
uint8_t boot_up_state;
uint8_t power_supply_state;
uint8_t thermal_state;
uint8_t security_status;
uint32_t oem_defined;
uint8_t height;
uint8_t number_of_power_cords;
uint8_t contained_element_count;
uint8_t contained_element_record_length;
uint8_t sku_number_str;
/* contained elements follow */
} QEMU_PACKED;
/* SMBIOS type 4 - Processor Information (v2.6) */
struct smbios_type_4 {
struct smbios_structure_header header;
uint8_t socket_designation_str;
uint8_t processor_type;
uint8_t processor_family;
uint8_t processor_manufacturer_str;
uint32_t processor_id[2];
uint8_t processor_version_str;
uint8_t voltage;
uint16_t external_clock;
uint16_t max_speed;
uint16_t current_speed;
uint8_t status;
uint8_t processor_upgrade;
uint16_t l1_cache_handle;
uint16_t l2_cache_handle;
uint16_t l3_cache_handle;
uint8_t serial_number_str;
uint8_t asset_tag_number_str;
uint8_t part_number_str;
uint8_t core_count;
uint8_t core_enabled;
uint8_t thread_count;
uint16_t processor_characteristics;
uint16_t processor_family2;
} QEMU_PACKED;
/* SMBIOS type 11 - OEM strings */
struct smbios_type_11 {
struct smbios_structure_header header;
uint8_t count;
} QEMU_PACKED;
/* SMBIOS type 16 - Physical Memory Array (v2.7) */
struct smbios_type_16 {
struct smbios_structure_header header;
uint8_t location;
uint8_t use;
uint8_t error_correction;
uint32_t maximum_capacity;
uint16_t memory_error_information_handle;
uint16_t number_of_memory_devices;
uint64_t extended_maximum_capacity;
} QEMU_PACKED;
/* SMBIOS type 17 - Memory Device (v2.8) */
struct smbios_type_17 {
struct smbios_structure_header header;
uint16_t physical_memory_array_handle;
uint16_t memory_error_information_handle;
uint16_t total_width;
uint16_t data_width;
uint16_t size;
uint8_t form_factor;
uint8_t device_set;
uint8_t device_locator_str;
uint8_t bank_locator_str;
uint8_t memory_type;
uint16_t type_detail;
uint16_t speed;
uint8_t manufacturer_str;
uint8_t serial_number_str;
uint8_t asset_tag_number_str;
uint8_t part_number_str;
uint8_t attributes;
uint32_t extended_size;
uint16_t configured_clock_speed;
uint16_t minimum_voltage;
uint16_t maximum_voltage;
uint16_t configured_voltage;
} QEMU_PACKED;
/* SMBIOS type 19 - Memory Array Mapped Address (v2.7) */
struct smbios_type_19 {
struct smbios_structure_header header;
uint32_t starting_address;
uint32_t ending_address;
uint16_t memory_array_handle;
uint8_t partition_width;
uint64_t extended_starting_address;
uint64_t extended_ending_address;
} QEMU_PACKED;
/* SMBIOS type 32 - System Boot Information */
struct smbios_type_32 {
struct smbios_structure_header header;
uint8_t reserved[6];
uint8_t boot_status;
} QEMU_PACKED;
/* SMBIOS type 41 - Onboard Devices Extended Information */
struct smbios_type_41 {
struct smbios_structure_header header;
uint8_t reference_designation_str;
uint8_t device_type;
uint8_t device_type_instance;
uint16_t segment_group_number;
uint8_t bus_number;
uint8_t device_number;
} QEMU_PACKED;
/* SMBIOS type 127 -- End-of-table */
struct smbios_type_127 {
struct smbios_structure_header header;
} QEMU_PACKED;
void smbios_entry_add(QemuOpts *opts, Error **errp);
void smbios_set_cpuid(uint32_t version, uint32_t features);
void smbios_set_defaults(const char *manufacturer, const char *product,
const char *version, bool legacy_mode,
bool uuid_encoded, SmbiosEntryPointType ep_type);
uint8_t *smbios_get_table_legacy(MachineState *ms, size_t *length);
void smbios_get_tables(MachineState *ms,
const struct smbios_phys_mem_area *mem_array,
const unsigned int mem_array_size,
uint8_t **tables, size_t *tables_len,
uint8_t **anchor, size_t *anchor_len,
Error **errp);
#endif /* QEMU_SMBIOS_H */
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