[PATCH v2 1/2] tee: define session login identifiers

[Jens Wiklander <jens.wiklander@linaro.org>]

On Wed, May 19, 2021 at 4:27 PM Etienne Carriere
<etienne.carriere@linaro.org> wrote:
>
> Define identifiers for clnt_login field in struct tee_open_session_arg
> based in GlobalPlatform Device TEE IDs and on the REE_KERNEL identifier
> extension from OP-TEE OS.
>
> Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
> ---
> Changes since v1:
> - Rename macros to TEE_LOGIN_* and use same inline description as made
>   in Linux kernel source tree.
> ---
>  include/tee.h | 23 +++++++++++++++++++++--
>  1 file changed, 21 insertions(+), 2 deletions(-)
>
> diff --git a/include/tee.h b/include/tee.h
> index 99367b258e..d56530653c 100644
> --- a/include/tee.h
> +++ b/include/tee.h
> @@ -31,6 +31,25 @@
>  #define TEE_PARAM_ATTR_MASK                    (TEE_PARAM_ATTR_TYPE_MASK | \
>                                                  TEE_PARAM_ATTR_META)
>
> +/*
> + * Global Platform login identifiers for tee_open_session_arg::clnt_login
> + */
> +#define TEE_LOGIN_PUBLIC                  0x00000000
> +#define TEE_LOGIN_USER                    0x00000001
> +#define TEE_LOGIN_GROUP                   0x00000002
> +#define TEE_LOGIN_APPLICATION             0x00000004
> +#define TEE_LOGIN_APPLICATION_USER        0x00000005
> +#define TEE_LOGIN_APPLICATION_GROUP       0x00000006
> +/*
> + * Disallow user-space to use GP implementation specific login
> + * method range (0x80000000 - 0xBFFFFFFF). This range is rather
> + * being reserved for REE kernel clients or TEE implementation.
> + */
> +#define TEE_LOGIN_REE_KERNEL_MIN          0x80000000
> +#define TEE_LOGIN_REE_KERNEL_MAX          0xBFFFFFFF
> +/* Private login method for REE kernel clients */
> +#define TEE_LOGIN_REE_KERNEL              0x80000000
> +

I might be a bit odd to talk about user-space in U-Boot, but I suppose
it's still good to know how this is supposed to work later in the
kernel too.

What do others think?

Cheers,
Jens