[U-Boot] [PATCH 1/1] efi_loader: variables PlatformLang and PlatformLangCodes

[AKASHI Takahiro <takahiro.akashi@linaro.org>]

On Fri, Apr 05, 2019 at 03:33:54AM +0200, Heinrich Schuchardt wrote:
> Since TianoCore EDK2 commit d65f2cea36d1 ("ShellPkg/CommandLib: Locate
> proper UnicodeCollation instance") in edk2 the UEFI Shell crashes if EFI
> variable PlatformLang is not defined.
> 
> As this variable is anyway prescribed in the UEFI 2.7 spec let's define it
> to L"en-US". Use the same value for PlatformLangCodes that defines the list
> of all supported languages.
> 
> Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
> ---
>  lib/efi_loader/efi_setup.c | 27 +++++++++++++++++++++++++++
>  1 file changed, 27 insertions(+)
> 
> diff --git a/lib/efi_loader/efi_setup.c b/lib/efi_loader/efi_setup.c
> index 8266d06c2e..e431c1c053 100644
> --- a/lib/efi_loader/efi_setup.c
> +++ b/lib/efi_loader/efi_setup.c
> @@ -10,6 +10,9 @@
> 
>  #define OBJ_LIST_NOT_INITIALIZED 1
> 
> +/* Language code for American English according to RFC 4646 */
> +#define EN_US L"en-US"
> +
>  static efi_status_t efi_obj_list_initialized = OBJ_LIST_NOT_INITIALIZED;
> 
>  /* Initialize and populate EFI object list */
> @@ -24,6 +27,30 @@ efi_status_t efi_init_obj_list(void)
>  	 */
>  	efi_save_gd();
> 
> +	/*
> +	 * Variable PlatformLang defines the language that the machine has been
> +	 * configured for.
> +	 */
> +	ret = EFI_CALL(efi_set_variable(L"PlatformLang",
> +					&efi_global_variable_guid,
> +					EFI_VARIABLE_BOOTSERVICE_ACCESS |
> +					EFI_VARIABLE_RUNTIME_ACCESS,
> +					sizeof(EN_US), EN_US));
> +	if (ret != EFI_SUCCESS)
> +		goto out;
> +
> +	/*
> +	 * Variable PlatformLangCodes defines the language codes that the
> +	 * machine can support.
> +	 */
> +	ret = EFI_CALL(efi_set_variable(L"PlatformLangCodes",
> +					&efi_global_variable_guid,
> +					EFI_VARIABLE_BOOTSERVICE_ACCESS |
> +					EFI_VARIABLE_RUNTIME_ACCESS,
> +					sizeof(EN_US), EN_US));
> +	if (ret != EFI_SUCCESS)
> +		goto out;

I don't think that it is a good idea to make a hard-coding like this
in init code. Instead, we should add some kind of framework so that
initial (default) variables can be configured.

-Takahiro Akashi


>  	/* Initialize once only */
>  	if (efi_obj_list_initialized != OBJ_LIST_NOT_INITIALIZED)
>  		return efi_obj_list_initialized;
> --
> 2.20.1
>