feat(mte): adds feature detection for MTE_PERM
Adds feature detection for v8.9 feature FEAT_MTE_PERM. Adds respective
ID_AA64PFR2_EL1 definitions and ENABLE_FEAT_MTE_PERM define.
Change-Id: If24b42f1207154e639016b0b840b2d91c6ee13d4
Signed-off-by: Maksims Svecovs <maksims.svecovs@arm.com>
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
diff --git a/include/arch/aarch64/arch_features.h b/include/arch/aarch64/arch_features.h
index 9d71987..9f11f15 100644
--- a/include/arch/aarch64/arch_features.h
+++ b/include/arch/aarch64/arch_features.h
@@ -148,6 +148,11 @@
return ISOLATE_FIELD(read_id_aa64mmfr0_el1(), ID_AA64MMFR0_EL1_FGT);
}
+static unsigned int read_feat_mte_perm_id_field(void)
+{
+ return ISOLATE_FIELD(read_id_aa64pfr2_el1(), ID_AA64PFR2_EL1_MTEPERM);
+}
+
static inline bool is_feat_fgt_supported(void)
{
if (ENABLE_FEAT_FGT == FEAT_STATE_DISABLED) {
@@ -161,6 +166,19 @@
return read_feat_fgt_id_field() != 0U;
}
+static inline bool is_feat_mte_perm_supported(void)
+{
+ if (ENABLE_FEAT_MTE_PERM == FEAT_STATE_DISABLED) {
+ return false;
+ }
+
+ if (ENABLE_FEAT_MTE_PERM == FEAT_STATE_ALWAYS) {
+ return true;
+ }
+
+ return read_feat_mte_perm_id_field() != 0U;
+}
+
static unsigned int read_feat_ecv_id_field(void)
{
return ISOLATE_FIELD(read_id_aa64mmfr0_el1(), ID_AA64MMFR0_EL1_ECV);