TF-A: Add HASH_ALG default value to defaults.mk
This patch adds default value of 'sha256' for HASH_ALG
build flag to 'make_helpers\defaults.mk', according to
'docs\getting_started\build-options.rst'.
This fixes Measured Boot driver error when TF-A uses
default HASH_ALG value and TPM_HASH_ALG is set to
sha384 or sha512.
Change-Id: Id0aa34b54807de0adaf88e5f7d7032577c22f365
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk
index 7220a5d..bc4982d 100644
--- a/make_helpers/defaults.mk
+++ b/make_helpers/defaults.mk
@@ -1,5 +1,5 @@
#
-# Copyright (c) 2016-2020, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2016-2020, ARM Limited. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
@@ -150,6 +150,10 @@
# by lower ELs.
HANDLE_EA_EL3_FIRST := 0
+# Secure hash algorithm flag, accepts 3 values: sha256, sha384 and sha512.
+# The default value is sha256.
+HASH_ALG := sha256
+
# Whether system coherency is managed in hardware, without explicit software
# operations.
HW_ASSISTED_COHERENCY := 0