VirtualBox: added support for "virtio" ISO interface.

builder/virtualbox/common/step_attach_isos.go

@@ -80,6 +80,10 @@ func (s *StepAttachISOs) Run(ctx context.Context, state multistep.StateBag) mult
 				controllerName = "SATA Controller"
 				port = "1"
 				device = "0"
+			} else if s.ISOInterface == "virtio" {
+				controllerName = "VirtIO Controller"
+				port = "1"
+				device = "0"
 			}
 			ui.Message("Mounting boot ISO...")
 		case "guest_additions":
@@ -90,6 +94,10 @@ func (s *StepAttachISOs) Run(ctx context.Context, state multistep.StateBag) mult
 				controllerName = "SATA Controller"
 				port = "2"
 				device = "0"
+			} else if s.GuestAdditionsInterface == "virtio" {
+				controllerName = "VirtIO Controller"
+				port = "2"
+				device = "0"
 			}
 			ui.Message("Mounting guest additions ISO...")
 		case "cd_files":
@@ -100,7 +108,11 @@ func (s *StepAttachISOs) Run(ctx context.Context, state multistep.StateBag) mult
 				controllerName = "SATA Controller"
 				port = "3"
 				device = "0"
-			}
+			} else if s.ISOInterface == "virtio" {
+				controllerName = "VirtIO Controller"
+				port = "3"
+				device = "0"
+         }
 			ui.Message("Mounting cd_files ISO...")
 		}
 

builder/virtualbox/iso/builder.go

@@ -211,9 +211,9 @@ func (b *Builder) Prepare(raws ...interface{}) ([]string, []string, error) {
 			errs, errors.New("nvme_port_count cannot be greater than 255"))
 	}
 
-	if b.config.ISOInterface != "ide" && b.config.ISOInterface != "sata" {
+	if b.config.ISOInterface != "ide" && b.config.ISOInterface != "sata" && b.config.ISOInterface != "virtio" {
 		errs = packersdk.MultiErrorAppend(
-			errs, errors.New("iso_interface can only be ide or sata"))
+			errs, errors.New("iso_interface can only be ide, sata or virtio"))
 	}
 
 	// Warnings

builder/virtualbox/iso/step_create_disk.go

@@ -66,15 +66,20 @@ func (s *stepCreateDisk) Run(ctx context.Context, state multistep.StateBag) mult
 		}
 	}
 
-	if config.HardDriveInterface == "scsi" {
-		if err := driver.CreateSCSIController(vmName, "SCSI Controller"); err != nil {
+	// Add a VirtIO controller if we were asked to use VirtIO. We still attach
+	// the VirtIO controller above because some other things (disks) require
+	// that.
+	if config.HardDriveInterface == "virtio" || config.ISOInterface == "virtio" {
+		if err := driver.CreateVirtIOController(vmName, "VirtIO Controller"); err != nil {
 			err := fmt.Errorf("Error creating disk controller: %s", err)
 			state.Put("error", err)
 			ui.Error(err.Error())
 			return multistep.ActionHalt
 		}
-	} else if config.HardDriveInterface == "virtio" {
-		if err := driver.CreateVirtIOController(vmName, "VirtIO Controller"); err != nil {
+	}
+
+	if config.HardDriveInterface == "scsi" {
+		if err := driver.CreateSCSIController(vmName, "SCSI Controller"); err != nil {
 			err := fmt.Errorf("Error creating disk controller: %s", err)
 			state.Put("error", err)
 			ui.Error(err.Error())