Archipelago » qemu

/*

 * 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"

/*

 * 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;

}