Core: change iovec return type to psa_status_t
- Change the return type of the iovec veneer functions to psa_status_t.
- Modify TF-M core to forward any return value from secure functions
that use iovec API to the caller.
- Update Core test services to use negative return values for
error, and zero or positive values for successful secure function
execution.
Change-Id: I5b42a194b955fd003c90d6dfd654ab55be483d20
Signed-off-by: Mate Toth-Pal <mate.toth-pal@arm.com>
diff --git a/interface/include/tfm_api.h b/interface/include/tfm_api.h
index 8dbf57c..be36e2e 100644
--- a/interface/include/tfm_api.h
+++ b/interface/include/tfm_api.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2017-2018, Arm Limited. All rights reserved.
+ * Copyright (c) 2017-2019, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*
@@ -41,11 +41,13 @@
/* FixMe: sort out DEBUG compile option and limit return value options
* on external interfaces */
-/* Note:
+/* For secure functions using prorietary signatures
* TFM will only return values recognized and parsed by TFM core.
* Service return codes are not automatically passed on to REE.
* Any non-zero return value is interpreted as an error that may trigger
* TEE error handling flow.
+ * For secure functions using the veneers in secure_fw/ns_callable/tfm_veneers.c
+ * (iovec API) this limitation does not apply.
*/
enum tfm_status_e
{