PCI passthru: tools changes (generic and vt-d)

I have added CONFIG_PASSTHROUGH in ioemu/Makefile.target and
ioemu/hw/pc.c in attached vtd_tools2.patch.  This should turn off
libpci usage by default until user specifically enables it.

This can be safely check-in without breaking builds for people who do
not care about pass-through devices.  I will try to think of a better
way to enable this.

Signed-off-by: Allen Kay <allen.m.kay@intel.com>
Signed-off-by: Guy Zana <guy@neocleus.com>

tools/python/xen/xend/XendConfig.py

@@ -127,7 +127,7 @@ XENAPI_PLATFORM_CFG = [ 'acpi', 'apic', 'boot', 'device_model', 'display',
                         'nographic', 'pae', 'rtc_timeoffset', 'serial', 'sdl',
                         'soundhw','stdvga', 'usb', 'usbdevice', 'vnc',
                         'vncconsole', 'vncdisplay', 'vnclisten',
-                        'vncpasswd', 'vncunused', 'xauthority']
+                        'vncpasswd', 'vncunused', 'xauthority', 'pci']
 
 # Xen API console 'other_config' keys.
 XENAPI_CONSOLE_OTHER_CFG = ['vncunused', 'vncdisplay', 'vnclisten',
@@ -168,6 +168,7 @@ XENAPI_CFG_TYPES = {
     'tools_version': dict,
     'other_config': dict,
     'security_label': str,
+    'pci': str,
 }
 
 # List of legacy configuration keys that have no equivalent in the

tools/python/xen/xend/image.py

@@ -309,7 +309,7 @@ class HVMImageHandler(ImageHandler):
     def parseDeviceModelArgs(self, vmConfig):
         dmargs = [ 'boot', 'fda', 'fdb', 'soundhw',
                    'localtime', 'serial', 'stdvga', 'isa',
-                   'acpi', 'usb', 'usbdevice', 'keymap' ]
+                   'acpi', 'usb', 'usbdevice', 'keymap', 'pci' ]
         
         ret = ['-vcpus', str(self.vm.getVCpuCount())]
 

tools/python/xen/xm/create.py

@@ -721,7 +721,7 @@ def configure_hvm(config_image, vals):
              'localtime', 'serial', 'stdvga', 'isa', 'nographic', 'soundhw',
              'vnc', 'vncdisplay', 'vncunused', 'vncconsole', 'vnclisten',
              'sdl', 'display', 'xauthority', 'rtc_timeoffset', 'monitor',
-             'acpi', 'apic', 'usb', 'usbdevice', 'keymap' ]
+             'acpi', 'apic', 'usb', 'usbdevice', 'keymap', 'pci' ]
     for a in args:
         if a in vals.__dict__ and vals.__dict__[a] is not None:
             config_image.append([a, vals.__dict__[a]])