[PATCH 1/2] efi: add more helper functions to write EFI variables

[Sascha Hauer]

On Wed, Dec 06, 2023 at 02:11:44PM +0100, Michael Olbrich wrote:
> Signed-off-by: Michael Olbrich <m.olbrich at pengutronix.de>
> ---
>  common/efi/payload/init.c | 38 ++++++++++++++++++++++++++++++++++++++
>  1 file changed, 38 insertions(+)

Applied, thanks

Sascha

> 
> diff --git a/common/efi/payload/init.c b/common/efi/payload/init.c
> index b990b54b2678..19be7ff07fb6 100644
> --- a/common/efi/payload/init.c
> +++ b/common/efi/payload/init.c
> @@ -107,6 +107,44 @@ int efi_set_variable_usec(char *name, efi_guid_t *vendor, uint64_t usec)
>  				(strlen(buf)+1) * sizeof(wchar_t));
>  }
>  
> +static int efi_set_variable_printf(char *name, efi_guid_t *vendor, const char *fmt, ...)
> +{
> +	va_list args;
> +	char *buf;
> +	wchar_t *buf16;
> +
> +	va_start(args, fmt);
> +	buf = xvasprintf(fmt, args);
> +	va_end(args);
> +	buf16 = xstrdup_char_to_wchar(buf);
> +
> +	return efi_set_variable(name, vendor,
> +				EFI_VARIABLE_BOOTSERVICE_ACCESS |
> +				EFI_VARIABLE_RUNTIME_ACCESS, buf16,
> +				(strlen(buf)+1) * sizeof(wchar_t));
> +	free(buf);
> +	free(buf16);
> +}
> +
> +static int efi_set_variable_uint64_le(char *name, efi_guid_t *vendor, uint64_t value)
> +{
> +	uint8_t buf[8];
> +
> +	buf[0] = (uint8_t)(value >> 0U & 0xFF);
> +	buf[1] = (uint8_t)(value >> 8U & 0xFF);
> +	buf[2] = (uint8_t)(value >> 16U & 0xFF);
> +	buf[3] = (uint8_t)(value >> 24U & 0xFF);
> +	buf[4] = (uint8_t)(value >> 32U & 0xFF);
> +	buf[5] = (uint8_t)(value >> 40U & 0xFF);
> +	buf[6] = (uint8_t)(value >> 48U & 0xFF);
> +	buf[7] = (uint8_t)(value >> 56U & 0xFF);
> +
> +	return efi_set_variable(name, vendor,
> +				EFI_VARIABLE_BOOTSERVICE_ACCESS |
> +				EFI_VARIABLE_RUNTIME_ACCESS, buf,
> +				sizeof(buf));
> +}
> +
>  struct efi_boot {
>  	u32 attributes;
>  	u16 file_path_len;
> -- 
> 2.39.2
> 
> 
> 

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