arch: AArch64: move GIC implementations to a separate module

This commit moves the GIC-related code to a separate module.
Therefore the implementation of GIC registers can be introduced
to the new module.

Signed-off-by: Henry Wang <Henry.Wang@arm.com>

arch/src/aarch64/gic/gicv3_its.rs

@@ -5,9 +5,9 @@ pub mod kvm {
     use std::sync::Arc;
     use std::{boxed::Box, result};
     type Result<T> = result::Result<T, Error>;
+    use crate::aarch64::gic::gicv3::kvm::KvmGICv3;
     use crate::aarch64::gic::kvm::KvmGICDevice;
     use crate::aarch64::gic::{Error, GICDevice};
-    use crate::aarch64::gicv3::kvm::KvmGICv3;
     use hypervisor::kvm::kvm_bindings;
 
     pub struct KvmGICv3ITS {

arch/src/aarch64/gic/mod.rs

@@ -1,6 +1,10 @@
 // Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 
+mod gicv2;
+mod gicv3;
+mod gicv3_its;
+
 use std::result;
 use std::sync::Arc;
 
@@ -49,9 +53,9 @@ pub trait GICDevice {
 pub mod kvm {
     use super::GICDevice;
     use super::Result;
-    use crate::aarch64::gicv2::kvm::KvmGICv2;
-    use crate::aarch64::gicv3::kvm::KvmGICv3;
-    use crate::aarch64::gicv3_its::kvm::KvmGICv3ITS;
+    use crate::aarch64::gic::gicv2::kvm::KvmGICv2;
+    use crate::aarch64::gic::gicv3::kvm::KvmGICv3;
+    use crate::aarch64::gic::gicv3_its::kvm::KvmGICv3ITS;
     use crate::layout;
     use hypervisor::kvm::kvm_bindings;
     use std::boxed::Box;

arch/src/aarch64/mod.rs

@@ -6,9 +6,6 @@
 pub mod fdt;
 /// Module for the global interrupt controller configuration.
 pub mod gic;
-mod gicv2;
-mod gicv3;
-mod gicv3_its;
 /// Layout for this aarch64 system.
 pub mod layout;
 /// Logic for configuring aarch64 registers.