Allow KVM hiding with the kvm_hidden attr

lib/vagrant-libvirt/action/create_domain.rb

@@ -57,6 +57,7 @@ module VagrantPlugins
           @video_type = config.video_type
           @video_vram = config.video_vram
           @keymap = config.keymap
+          @kvm_hidden = config.kvm_hidden
 
           # Boot order
           @boot_order = config.boot_order

lib/vagrant-libvirt/config.rb

@@ -78,6 +78,7 @@ module VagrantPlugins
       attr_accessor :video_type
       attr_accessor :video_vram
       attr_accessor :keymap
+      attr_accessor :kvm_hidden
 
       # Sets the max number of NICs that can be created
       # Default set to 8. Don't change the default unless you know
@@ -140,6 +141,7 @@ module VagrantPlugins
         @video_type        = UNSET_VALUE
         @video_vram        = UNSET_VALUE
         @keymap            = UNSET_VALUE
+        @kvm_hidden        = UNSET_VALUE
 
         @nic_adapter_count = UNSET_VALUE
 
@@ -401,6 +403,7 @@ module VagrantPlugins
         @video_type = 'cirrus' if @video_type == UNSET_VALUE
         @video_vram = 9216 if @video_vram == UNSET_VALUE
         @keymap = 'en-us' if @keymap == UNSET_VALUE
+        @kvm_hidden = false if @kvm_hidden == UNSET_VALUE
         @nic_adapter_count = 8 if @nic_adapter_count == UNSET_VALUE
 
         # Boot order

lib/vagrant-libvirt/templates/domain.xml.erb

@@ -44,6 +44,11 @@
     <acpi/>
     <apic/>
     <pae/>
+    <% if @kvm_hidden %>
+      <kvm>
+        <hidden state='on'/>
+      </kvm>
+    <% end %>
   </features>
   <clock offset='utc'/>
   <devices>