arch-arm: Add have_crypto System parameter

This patch adds the have_crypto ArmSystem parameter for enabling crypto
extension. This is done by modifying the AArch32/AArch64 ID registers
at startup time.

Change-Id: I6eefb7e6f6354802a14ea639ad53b75f8e1e11c5
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/13252
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>

src/arch/arm/system.hh

@@ -88,6 +88,11 @@ class ArmSystem : public System
      */
     const bool _haveVirtualization;
 
+    /**
+     * True if this system implements the Crypto Extension
+     */
+    const bool _haveCrypto;
+
     /**
      * Pointer to the Generic Timer wrapper.
      */
@@ -177,6 +182,11 @@ class ArmSystem : public System
       */
     bool haveVirtualization() const { return _haveVirtualization; }
 
+    /** Returns true if this system implements the Crypto
+      * Extension
+      */
+    bool haveCrypto() const { return _haveCrypto; }
+
     /** Sets the pointer to the Generic Timer. */
     void setGenericTimer(GenericTimer *generic_timer)
     {