feat(rng_trap): add tests for FEAT_RNG_TRAP
Added 2 tests that expect a trap to be triggered when a read is
performed on:
1. RNDR register
2. RNDRRS register
The result will be a panic signal and the whole system will halt,
as there is no handler set for such trap.
Signed-off-by: Juan Pablo Conde <juanpablo.conde@arm.com>
Change-Id: Ia979e60a106b394cc09dfdf94115354fb72142d1
diff --git a/include/lib/aarch64/arch_features.h b/include/lib/aarch64/arch_features.h
index 46d12c9..1d90138 100644
--- a/include/lib/aarch64/arch_features.h
+++ b/include/lib/aarch64/arch_features.h
@@ -166,4 +166,11 @@
ID_AA64ISAR2_WFXT_MASK) == ID_AA64ISAR2_WFXT_SUPPORTED);
}
+static inline bool is_feat_rng_trap_present(void)
+{
+ return (((read_id_aa64pfr1_el1() >> ID_AA64PFR1_EL1_RNDR_TRAP_SHIFT) &
+ ID_AA64PFR1_EL1_RNDR_TRAP_MASK)
+ == ID_AA64PFR1_EL1_RNG_TRAP_SUPPORTED);
+}
+
#endif /* ARCH_FEATURES_H */