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

[Etienne Carriere <etienne.carriere@linaro.org>]

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
+
 /*
  * Some Global Platform error codes which has a meaning if the
  * TEE_GEN_CAP_GP bit is returned by the driver in
@@ -135,8 +154,8 @@ struct tee_param {
 /**
  * struct tee_open_session_arg - extra arguments for tee_open_session()
  * @uuid:	[in] UUID of the Trusted Application
- * @clnt_uuid:	[in] Normally zeroes
- * @clnt_login:	[in] Normally 0
+ * @clnt_uuid:	[in] UUID of client, zeroes for PUBLIC/REE_KERNEL
+ * @clnt_login:	[in] Class of client TEE_LOGIN_*
  * @session:	[out] Session id
  * @ret:	[out] return value
  * @ret_origin:	[out] origin of the return value
-- 
2.17.1