refactor(mte): deprecate CTX_INCLUDE_MTE_REGS
Currently CTX_INCLUDE_MTE_REGS is used for dual purpose,
to enable allocation tags register and to context save and restore
them and also to check if mte feature is available.
To make it more meaningful, remove CTX_INCLUDE_MTE_REGS
and introduce FEAT_MTE. This would enable allocation tags register
when FEAT_MTE is enabled and also supported from platform.
Also arch features can be conditionally enabled disabled based on
arch version from `make_helpers/arch_features.mk`
Change-Id: Ibdd2d43874634ad7ddff93c7edad6044ae1631ed
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
diff --git a/common/feat_detect.c b/common/feat_detect.c
index be22c6e..49b5360 100644
--- a/common/feat_detect.c
+++ b/common/feat_detect.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2022-2023, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2022-2024, Arm Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -70,18 +70,6 @@
#endif
}
-/************************************************
- * Feature : FEAT_MTE (Memory Tagging Extension)
- ***********************************************/
-static void read_feat_mte(void)
-{
-#if (CTX_INCLUDE_MTE_REGS == FEAT_STATE_ALWAYS)
- unsigned int mte = get_armv8_5_mte_support();
-
- feat_detect_panic((mte != MTE_UNIMPLEMENTED), "MTE");
-#endif
-}
-
/****************************************************
* Feature : FEAT_BTI (Branch Target Identification)
***************************************************/
@@ -179,7 +167,8 @@
"TRF", 1, 1);
/* v8.5 features */
- read_feat_mte();
+ check_feature(ENABLE_FEAT_MTE, read_feat_mte_id_field(), "MTE",
+ MTE_IMPLEMENTED_EL0, MTE_IMPLEMENTED_ASY);
check_feature(ENABLE_FEAT_RNG, read_feat_rng_id_field(), "RNG", 1, 1);
read_feat_bti();
read_feat_rng_trap();