Specify PCI bus and slot for net iface

Signed-off-by: Tomasz Madycki <tomasz.madycki@gmail.com>

README.md

@@ -639,6 +639,8 @@ starts with `libvirt__` string. Here is a list of those options:
   info](http://www.linux-kvm.org/page/Multiqueue)
 * `:autostart` - Automatic startup of network by the libvirt daemon.
   If not specified the default is 'false'.
+* `:bus` - The bus of the PCI device. Both :bus and :slot have to be defined.
+* `:slot` - The slot of the PCI device. Both :bus and :slot have to be defined.
 
 When the option `:libvirt__dhcp_enabled` is to to 'false' it shouldn't matter
 whether the virtual network contains a DHCP server or not and vagrant-libvirt

lib/vagrant-libvirt/action/create_network_interfaces.rb

@@ -77,6 +77,8 @@ module VagrantPlugins
             @driver_queues = iface_configuration.fetch(:driver_queues, false)
             @device_name = iface_configuration.fetch(:iface_name, false)
             @mtu = iface_configuration.fetch(:mtu, nil)
+            @pci_bus = iface_configuration.fetch(:bus, nil)
+            @pci_slot = iface_configuration.fetch(:slot, nil)
             template_name = 'interface'
             # Configuration for public interfaces which use the macvtap driver
             if iface_configuration[:iface_type] == :public_network
@@ -146,7 +148,9 @@ module VagrantPlugins
                                     @model_type,
                                     @mtu,
                                     driver_options,
-                                    @udp_tunnel)
+                                    @udp_tunnel,
+                                    @pci_bus,
+                                    @pci_slot)
                     else
                       to_xml(template_name)
                     end
@@ -237,7 +241,7 @@ module VagrantPlugins
 
         def interface_xml(type, source_options, mac, device_name,
                           iface_number, model_type, mtu, driver_options,
-                          udp_tunnel={})
+                          udp_tunnel={}, pci_bus, pci_slot)
           Nokogiri::XML::Builder.new do |xml|
             xml.interface(type: type || 'network') do
               xml.source(source_options) do
@@ -249,6 +253,7 @@ module VagrantPlugins
               xml.model(type: model_type.to_s)
               xml.mtu(size: Integer(mtu)) if mtu
               xml.driver(driver_options)
+              xml.address(type: 'pci', bus: pci_bus, slot: pci_slot) if pci_bus and pci_slot
             end
           end.to_xml(
             save_with: Nokogiri::XML::Node::SaveOptions::NO_DECLARATION |

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

@@ -20,4 +20,7 @@
   <% if @ovs %>
   <virtualport type='openvswitch'/>
   <% end %>
+  <% if @pci_bus and @pci_slot %>
+  <address type='pci' bus='<%=@pci_bus%>' slot='<%=@pci_slot%>' />
+  <% end %>
 </interface>