[PATCH v5 05/12] tee: increase TEE_MAX_ARG_SIZE to 4096

[Sumit Garg]

On Mon, May 26, 2025 at 11:56:50PM -0700, Amirreza Zarrabi wrote:
> Increase TEE_MAX_ARG_SIZE to accommodate worst-case scenarios where
> additional buffer space is required to pass all arguments to TEE.
> This change is necessary for upcoming support for Qualcomm TEE, which
> requires a larger buffer for argument marshaling.
> 
> Signed-off-by: Amirreza Zarrabi <amirreza.zarrabi at oss.qualcomm.com>
> ---
>  include/uapi/linux/tee.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Sumit Garg <sumit.garg at oss.qualcomm.com>

-Sumit

> 
> diff --git a/include/uapi/linux/tee.h b/include/uapi/linux/tee.h
> index 441d97add53f..71a365afb89b 100644
> --- a/include/uapi/linux/tee.h
> +++ b/include/uapi/linux/tee.h
> @@ -42,7 +42,7 @@
>  #define TEE_IOC_MAGIC	0xa4
>  #define TEE_IOC_BASE	0
>  
> -#define TEE_MAX_ARG_SIZE	1024
> +#define TEE_MAX_ARG_SIZE	4096
>  
>  #define TEE_GEN_CAP_GP		(1 << 0)/* GlobalPlatform compliant TEE */
>  #define TEE_GEN_CAP_PRIVILEGED	(1 << 1)/* Privileged device (for supplicant) */
> 
> -- 
> 2.34.1
> 
>