[PATCH] x86: efi_loader: Ensure the SMBIOS tables are sent via EFI

[Ilias Apalodimas]

Hi Simon

On Sat, 5 Apr 2025 at 23:46, Simon Glass <sjg at chromium.org> wrote:
>
> The EFI-loader code has not been fully converted to use bloblist, so
> relies on the SMBIOS-table address being set in global_data.

Can you explain a bit more what this means? The SMBIOS tables for EFI
are supposed to be on EFI allocated memory

>
> Set this up in write_tables() so that the SMBIOS tables are actually
> available.
>
> Enable the command for x86 QEMU so that the SMBIOS tests actually run.
>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> Fixes: 83ce35d6ebb ("emulation: Use bloblist to hold tables")
> Reported-by: Niklas Sombert <niklas.sombert at uni-duesseldorf.de>
> ---
>
>  arch/x86/lib/tables.c            | 2 ++
>  board/emulation/qemu-x86/Kconfig | 1 +
>  lib/efi_loader/efi_smbios.c      | 1 +
>  3 files changed, 4 insertions(+)
>
> diff --git a/arch/x86/lib/tables.c b/arch/x86/lib/tables.c
> index ec52992209f..d7f183f95dc 100644
> --- a/arch/x86/lib/tables.c
> +++ b/arch/x86/lib/tables.c
> @@ -126,6 +126,8 @@ int write_tables(void)
>                         use_high = true;
>                         if (!gd->arch.table_start_high)
>                                 gd->arch.table_start_high = rom_addr;
> +                       if (table->tag == BLOBLISTT_SMBIOS_TABLES)
> +                               gd_set_smbios_start(rom_addr);
>                 }
>                 rom_table_end = table->write(rom_addr);
>                 if (!rom_table_end) {
> diff --git a/board/emulation/qemu-x86/Kconfig b/board/emulation/qemu-x86/Kconfig
> index b2a4e0891a4..c1564fba7cd 100644
> --- a/board/emulation/qemu-x86/Kconfig
> +++ b/board/emulation/qemu-x86/Kconfig
> @@ -23,5 +23,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy
>         imply VIRTIO_PCI
>         imply VIRTIO_NET
>         imply VIRTIO_BLK
> +       imply CMD_SMBIOS
>
>  endif
> diff --git a/lib/efi_loader/efi_smbios.c b/lib/efi_loader/efi_smbios.c
> index 8d2ef6deb51..5275e966dfe 100644
> --- a/lib/efi_loader/efi_smbios.c
> +++ b/lib/efi_loader/efi_smbios.c
> @@ -35,6 +35,7 @@ efi_status_t efi_smbios_register(void)
>         void *buf;
>
>         addr = gd_smbios_start();
> +       printf("register %lx\n", addr);

I don't think this print is useful at all, why isn't the log_err()
right below enough?

>         if (!addr) {
>                 log_err("No SMBIOS tables to install\n");
>                 return EFI_NOT_FOUND;
> --
> 2.43.0
>

Thanks
/Ilias