refactor(rss)!: remove PLAT_RSS_NOT_SUPPORTED build option

Removed the PLAT_RSS_NOT_SUPPORTED build option, which was initially
introduced for building the Base AEM FVP platform platform with RSS.
However, we now have a well-defined TC2 platform with RSS, making it
unnecessary to keep this flag.

Note -
Theoretically this is a breaking change. Other platforms could be
using the PLAT_RSS_NOT_SUPPORTED build option. Among upstream platforms,
only the Base AEM FVP uses it right now but we don't know about
downstream platforms.

Change-Id: I931905a4c6ac1ebe3895ab6e0287d0fa07721707
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>

Makefile

@@ -1191,7 +1191,6 @@ $(eval $(call assert_booleans,\
 	NS_TIMER_SWITCH \
 	OVERRIDE_LIBC \
 	PL011_GENERIC_UART \
-	PLAT_RSS_NOT_SUPPORTED \
 	PROGRAMMABLE_RESET_ADDRESS \
 	PSCI_EXTENDED_STATE_ID \
 	PSCI_OS_INIT_MODE \
@@ -1354,7 +1353,6 @@ $(eval $(call add_defines,\
 	NS_TIMER_SWITCH \
 	PL011_GENERIC_UART \
 	PLAT_${PLAT} \
-	PLAT_RSS_NOT_SUPPORTED \
 	PROGRAMMABLE_RESET_ADDRESS \
 	PSCI_EXTENDED_STATE_ID \
 	PSCI_OS_INIT_MODE \

docs/getting_started/build-options.rst

@@ -1167,11 +1167,6 @@ Common build options
   if FEAT_TRF is implemented. This flag can take the values 0 to 2, to align
   with the ``FEATURE_DETECTION`` mechanism. This flag is disabled by default.
 
-- ``PLAT_RSS_NOT_SUPPORTED``: Boolean option to enable the usage of the PSA
-  APIs on platforms that doesn't support RSS (providing Arm CCA HES
-  functionalities). When enabled (``1``), a mocked version of the APIs are used.
-  The default value is 0.
-
 - ``CONDITIONAL_CMO``: Boolean option to enable call to platform-defined routine
   ``plat_can_cmo`` which will return zero if cache management operations should
   be skipped and non-zero otherwise. By default, this option is disabled which

lib/psa/measured_boot.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, Arm Limited. All rights reserved.
+ * Copyright (c) 2022-2023, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -61,7 +61,6 @@ static void log_measurement(uint8_t index,
 	INFO(" - locking     : %s\n", lock_measurement ? "true" : "false");
 }
 
-#if !PLAT_RSS_NOT_SUPPORTED
 psa_status_t
 rss_measured_boot_extend_measurement(uint8_t index,
 				     const uint8_t *signer_id,
@@ -175,47 +174,3 @@ psa_status_t rss_measured_boot_read_measurement(uint8_t index,
 
 	return status;
 }
-
-#else /* !PLAT_RSS_NOT_SUPPORTED */
-
-psa_status_t
-rss_measured_boot_extend_measurement(uint8_t index,
-				     const uint8_t *signer_id,
-				     size_t signer_id_size,
-				     const uint8_t *version,
-				     size_t version_size,
-				     uint32_t measurement_algo,
-				     const uint8_t *sw_type,
-				     size_t sw_type_size,
-				     const uint8_t *measurement_value,
-				     size_t measurement_value_size,
-				     bool lock_measurement)
-{
-	log_measurement(index, signer_id, signer_id_size,
-			version, version_size, sw_type, sw_type_size,
-			measurement_algo, measurement_value,
-			measurement_value_size, lock_measurement);
-
-	return PSA_SUCCESS;
-}
-
-psa_status_t rss_measured_boot_read_measurement(uint8_t index,
-					uint8_t *signer_id,
-					size_t signer_id_size,
-					size_t *signer_id_len,
-					uint8_t *version,
-					size_t version_size,
-					size_t *version_len,
-					uint32_t *measurement_algo,
-					uint8_t *sw_type,
-					size_t sw_type_size,
-					size_t *sw_type_len,
-					uint8_t *measurement_value,
-					size_t measurement_value_size,
-					size_t *measurement_value_len,
-					bool *is_locked)
-{
-	return PSA_SUCCESS;
-}
-
-#endif /* !PLAT_RSS_NOT_SUPPORTED */

make_helpers/defaults.mk

@@ -347,9 +347,6 @@ NR_OF_IMAGES_IN_FW_BANK		:= 1
 # Disable Firmware update support by default
 PSA_FWU_SUPPORT			:= 0
 
-# By default, disable the mocking of RSS provided services
-PLAT_RSS_NOT_SUPPORTED		:= 0
-
 # Dynamic Root of Trust for Measurement support
 DRTM_SUPPORT			:= 0