Re: [PATCH v4 4/7] tee: Export uuidv5 generation for TEE backends

[Amirreza Zarrabi]

On 10/6/2026 10:33 PM, Harshal Dev wrote:
> Export the uuidv5() function defined in the TEE core to all TEE backends.
> This enables the TEE backend drivers to generate a UUID for identifying
> and registering their secure services on the TEE bus.
> 
> Reviewed-by: Sumit Garg <sumit.garg@xxxxxxxxxxxxxxxx>
> Signed-off-by: Harshal Dev <harshal.dev@xxxxxxxxxxxxxxxx>
> ---
>  drivers/tee/tee_core.c   |  9 +++++----
>  include/linux/tee_core.h | 15 +++++++++++++++
>  2 files changed, 20 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c
> index a03a3d645dd1..2cfd302d1393 100644
> --- a/drivers/tee/tee_core.c
> +++ b/drivers/tee/tee_core.c
> @@ -135,7 +135,7 @@ static int tee_release(struct inode *inode, struct file *filp)
>  }
>  
>  /**
> - * uuid_v5() - Calculate UUIDv5
> + * tee_generate_uuid_v5() - Calculate UUIDv5
>   * @uuid: Resulting UUID
>   * @ns: Name space ID for UUIDv5 function
>   * @name: Name for UUIDv5 function
> @@ -146,8 +146,8 @@ static int tee_release(struct inode *inode, struct file *filp)
>   * This implements section (for SHA-1):
>   * 4.3.  Algorithm for Creating a Name-Based UUID
>   */
> -static void uuid_v5(uuid_t *uuid, const uuid_t *ns, const void *name,
> -		    size_t size)
> +void tee_generate_uuid_v5(uuid_t *uuid, const uuid_t *ns, const void *name,
> +			  size_t size)
>  {
>  	unsigned char hash[SHA1_DIGEST_SIZE];
>  	struct sha1_ctx ctx;
> @@ -163,6 +163,7 @@ static void uuid_v5(uuid_t *uuid, const uuid_t *ns, const void *name,
>  	uuid->b[6] = (hash[6] & 0x0F) | 0x50;
>  	uuid->b[8] = (hash[8] & 0x3F) | 0x80;
>  }
> +EXPORT_SYMBOL_GPL(tee_generate_uuid_v5);
>  
>  int tee_session_calc_client_uuid(uuid_t *uuid, u32 connection_method,
>  				 const u8 connection_data[TEE_IOCTL_UUID_LEN])
> @@ -228,7 +229,7 @@ int tee_session_calc_client_uuid(uuid_t *uuid, u32 connection_method,
>  		goto out_free_name;
>  	}
>  
> -	uuid_v5(uuid, &tee_client_uuid_ns, name, name_len);
> +	tee_generate_uuid_v5(uuid, &tee_client_uuid_ns, name, name_len);
>  out_free_name:
>  	kfree(name);
>  
> diff --git a/include/linux/tee_core.h b/include/linux/tee_core.h
> index bcb5418d6fdc..a3f4f88b8423 100644
> --- a/include/linux/tee_core.h
> +++ b/include/linux/tee_core.h
> @@ -272,6 +272,21 @@ void tee_device_set_dev_groups(struct tee_device *teedev,
>  int tee_session_calc_client_uuid(uuid_t *uuid, u32 connection_method,
>  				 const u8 connection_data[TEE_IOCTL_UUID_LEN]);
>  
> +/**
> + * tee_generate_uuid_v5() - Calculate UUIDv5
> + * @uuid: Resulting UUID
> + * @ns: Name space ID for UUIDv5 function
> + * @name: Name for UUIDv5 function
> + * @size: Size of name
> + *
> + * UUIDv5 is specific in RFC 4122.
> + *
> + * This implements section (for SHA-1):
> + * 4.3.  Algorithm for Creating a Name-Based UUID
> + */

I think the functions in the header do not need to replicate the docs from c files.
If you want you can remove it. Otherwise,

Reviewed-by: Amirreza Zarrabi <amirreza.zarrabi@xxxxxxxxxxxxxxxx>

- Amir

> +void tee_generate_uuid_v5(uuid_t *uuid, const uuid_t *ns, const void *name,
> +			  size_t size);
> +
>  /**
>   * struct tee_shm_pool - shared memory pool
>   * @ops:		operations
>