Add missing Copy derives

Add free Copy derives where possible. Add a lint to prevent future
additions of types that do not derive Copy where possible.

Signed-off-by: Carlos López <[email protected]>

Author: 00xc

CHANGELOG.md

@@ -5,6 +5,8 @@
 ## Changed
 - [[#234](https://github.com/rust-vmm/kvm-ioctls/issues/234)] vcpu: export
 reg_size as a public method.
+-[[#243](https://github.com/rust-vmm/kvm-ioctls/pull/243)] derived the `Copy`
+ trait for `IoEventAddress` and `NoDatamatch`.
 
 # v0.15.0
 

src/ioctls/vm.rs

@@ -28,7 +28,7 @@ use vmm_sys_util::ioctl::{ioctl, ioctl_with_mut_ref, ioctl_with_ref, ioctl_with_
 ///
 /// The `IoEventAddress` is used for specifying the type when registering an event
 /// in [register_ioevent](struct.VmFd.html#method.register_ioevent).
-#[derive(Debug)]
+#[derive(Debug, Clone, Copy)]
 pub enum IoEventAddress {
     /// Representation of an programmable I/O address.
     Pio(u64),
@@ -42,7 +42,7 @@ pub enum IoEventAddress {
 /// [`register_ioevent`](struct.VmFd.html#method.register_ioevent)
 /// to disable filtering of events based on the datamatch flag. For details check the
 /// [KVM API documentation](https://www.kernel.org/doc/Documentation/virtual/kvm/api.txt).
-#[derive(Debug)]
+#[derive(Debug, Clone, Copy)]
 pub struct NoDatamatch;
 impl From<NoDatamatch> for u64 {
     fn from(_: NoDatamatch) -> u64 {

src/lib.rs

@@ -5,6 +5,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the THIRD-PARTY file.
 #![deny(missing_docs)]
+#![deny(missing_copy_implementations)]
 
 //! A safe wrapper around the kernel's KVM interface.
 //!