title: Xen 4.4: "/usr/lib/xen-4.4/bin/qemu-dm" is not executable
body: <p>I have a Debian server on which runs Xen 4.4. I want to crete a new Windows 7 virtual machine and install it from ISO image. This is the config file which I use for this:</p>
  
  <pre><code>kernel = "/usr/lib/xen-4.4/boot/hvmloader"
  
  builder = 'hvm'
  
  name = "win7"
  uuid = "44dee145-256a-4450-9270-73aebd8b64a5"
  memory = 2048
  vcpus = 1
  on_poweroff = "destroy"
  on_reboot = "restart"
  on_crash = "restart"
  
  disk = [
           'phy:/dev/vg0/win7-demo-disk,hda,w',
           'file:/tmp/Win7.iso,hdc,r,devtype=cdrom',
         ]
  
  vif = [ "mac=00:16:3e:46:e6:fb,bridge=br0" ]
  boot="dc"
  vnc = 1
  vnclisten = "0.0.0.0"
  vncunused = 1
  localtime = 1
  vncpasswd = "XXXXXXXX"
  </code></pre>
  
  <p>I execute this commad: xl create win7.cfg </p>
  
  <p>It prins the following errors:</p>
  
  <pre><code>Parsing config from win7.cfg
  WARNING: ignoring "kernel" directive for HVM guest. Use "firmware_override" instead if you really want a non-default firmware
  libxl: error: libxl_dm.c:1250:libxl__spawn_local_dm: device model /usr/lib/xen-4.4/bin/qemu-dm is not executable: No such file or directory
  libxl: error: libxl_dm.c:1388:device_model_spawn_outcome: (null): spawn failed (rc=-3)
  libxl: error: libxl_create.c:1186:domcreate_devmodel_started: device model did not start: -3
  libxl: error: libxl_dm.c:1484:kill_device_model: unable to find device model pid in /local/domain/395/image/device-model-pid
  libxl: error: libxl.c:1421:libxl__destroy_domid: libxl__destroy_device_model failed for 395
  </code></pre>
  
  <p>In the <strong>/usr/lib/xen-4.4/bin/</strong> directory I do not have <strong>qemu-dm</strong> file. I have read on Debian forun the <strong>qemu-dm</strong> was removed from the Xen 4.4. Previously I have Xen 4.1. For this version the <strong>qemu-dm</strong> exeists and stores in the <strong>/usr/lib/xen-4.4/bin/qemu-dm</strong></p>
  
  <p>How to solve this problem?</p>