feat(smccc): add FEAT_TWED to ARCH_FEATURE_AVAILABILITY
FEAT_TWED (Delayed Trapping of WFE) is an ARMv8.6 feature that is
advertised in the ID_AA64MMFR1_EL1 ID register and controlled by a bit
in the SCR_EL3 register.
On cores implementing that feature we should announce it in the
ARCH_FEATURE_AVAILABILITY SMCCC call, so that users of that interface
can correctly assess the availability of the delayed trap.
Change-Id: I2b185f7eb9d58e45472983204db0305511372477
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/include/services/arm_arch_svc.h b/include/services/arm_arch_svc.h
index efa3668..49f87f9 100644
--- a/include/services/arm_arch_svc.h
+++ b/include/services/arm_arch_svc.h
@@ -95,6 +95,12 @@
#define SCR_FEAT_AMUv1p1 (0)
#endif
+#if ENABLE_FEAT_TWED
+#define SCR_FEAT_TWED SCR_TWEDEn_BIT
+#else
+#define SCR_FEAT_TWED (0)
+#endif
+
#if ENABLE_FEAT_ECV
#define SCR_FEAT_ECV SCR_ECVEN_BIT
#else
@@ -182,6 +188,7 @@
SCR_FEAT_HCX | \
SCR_FEAT_LS64_ACCDATA | \
SCR_FEAT_AMUv1p1 | \
+ SCR_FEAT_TWED | \
SCR_FEAT_ECV | \
SCR_FEAT_FGT | \
SCR_FEAT_MTE2 | \