[RFC 1/8] boot: EFI boot manager does not depend on BootOrder

[Simon Glass]

Hi Heinrich,

On Mon, 21 Apr 2025 at 10:26, Heinrich Schuchardt
<heinrich.schuchardt at canonical.com> wrote:
>
> The EFI boot manager bootmeth does not require variable BootOrder to be
> preexisting. It creates this variable.
>
> Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
> ---
>  boot/bootmeth_efi_mgr.c | 21 +++------------------
>  1 file changed, 3 insertions(+), 18 deletions(-)
>
> diff --git a/boot/bootmeth_efi_mgr.c b/boot/bootmeth_efi_mgr.c
> index 42b8863815e..1669cbed5bd 100644
> --- a/boot/bootmeth_efi_mgr.c
> +++ b/boot/bootmeth_efi_mgr.c
> @@ -47,30 +47,15 @@ static int efi_mgr_check(struct udevice *dev, struct bootflow_iter *iter)
>
>  static int efi_mgr_read_bootflow(struct udevice *dev, struct bootflow *bflow)
>  {
> -       struct efi_mgr_priv *priv = dev_get_priv(dev);
> -       efi_status_t ret;
> -       efi_uintn_t size;
> -       u16 *bootorder;
> -
> -       if (priv->fake_dev) {
> -               bflow->state = BOOTFLOWST_READY;
> -               return 0;
> -       }
> +       int ret
>
>         ret = efi_init_obj_list();
>         if (ret)
>                 return log_msg_ret("init", ret);
>
> -       /* Enable this method if the "BootOrder" UEFI exists. */
> -       bootorder = efi_get_var(u"BootOrder", &efi_global_variable_guid,
> -                               &size);
> -       if (bootorder) {
> -               free(bootorder);
> -               bflow->state = BOOTFLOWST_READY;
> -               return 0;
> -       }
> +       bflow->state = BOOTFLOWST_READY;
>
> -       return -EINVAL;
> +       return 0;
>  }
>
>  static int efi_mgr_read_file(struct udevice *dev, struct bootflow *bflow,
> --
> 2.48.1
>

How do we know if the board is using EFI bootmgr? My understanding was
that this was a way to find out?

Regards,
Simon