Re: [Qemu-devel] [PATCH 01/18] smbios: Add a function to directly add an entry

[Anthony Liguori <anthony@codemonkey.ws>]

minyard@acm.org writes:

> From: Corey Minyard <cminyard@mvista.com>
>
> There was no way to directly add a table entry to the SMBIOS table,
> even though the BIOS supports this.  So add a function to do this.
> This is in preparation for the IPMI handler adding it's SMBIOS table
> entry.
>
> Signed-off-by: Corey Minyard <cminyard@mvista.com>

I don't expect that hardware ever adds SMBIOS entries.  Rather, the BIOS
adds the entries by probing the hardware.

So I think you should solve this in SeaBIOS, instead of trying to do it
in QEMU.  I think that also solves the problem you have with
pre-firmware init.

Regards,

Anthony Liguori

> ---
>  hw/smbios.c |   27 +++++++++++++++++++++++++++
>  hw/smbios.h |   15 ++++++++-------
>  2 files changed, 35 insertions(+), 7 deletions(-)
>
> diff --git a/hw/smbios.c b/hw/smbios.c
> index c57237d..c0c1be1 100644
> --- a/hw/smbios.c
> +++ b/hw/smbios.c
> @@ -178,6 +178,33 @@ static void smbios_build_type_1_fields(const char *t)
>                           strlen(buf) + 1, buf);
>  }
>  
> +int smbios_table_entry_add(struct smbios_structure_header *entry)
> +{
> +    struct smbios_table *table;
> +    struct smbios_structure_header *header;
> +    unsigned int size = entry->length;
> +
> +    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(*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);
> +
> +    header = (struct smbios_structure_header *)(table->data);
> +    memcpy(header, entry, size);
> +
> +    smbios_check_collision(header->type, SMBIOS_TABLE_ENTRY);
> +
> +    smbios_entries_len += sizeof(*table) + size;
> +    (*(uint16_t *)smbios_entries) =
> +        cpu_to_le16(le16_to_cpu(*(uint16_t *)smbios_entries) + 1);
> +    return 0;
> +}
> +
>  int smbios_entry_add(const char *t)
>  {
>      char buf[1024];
> diff --git a/hw/smbios.h b/hw/smbios.h
> index 94e3641..6431a15 100644
> --- a/hw/smbios.h
> +++ b/hw/smbios.h
> @@ -13,21 +13,22 @@
>   *
>   */
>  
> +/* This goes at the beginning of every SMBIOS structure. */
> +struct smbios_structure_header {
> +    uint8_t type;
> +    uint8_t length;
> +    uint16_t handle;
> +} QEMU_PACKED;
> +
>  int smbios_entry_add(const char *t);
>  void smbios_add_field(int type, int offset, int len, void *data);
>  uint8_t *smbios_get_table(size_t *length);
> +int smbios_table_entry_add(struct smbios_structure_header *entry);
>  
>  /*
>   * SMBIOS spec defined tables
>   */
>  
> -/* 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;
> -- 
> 1.7.4.1