pci: add pci option support for XenAPI sever

Allow the per-device options for passthrough pci devices
This patch is for XenAPI server

A new key-value pair element of 'pci' named 'pci_opt' is added
to xml config file

Signed-off-by: Qing He <qing.he@intel.com>

tools/python/xen/xend/XendConfig.py

@@ -1247,6 +1247,11 @@ class XendConfig(dict):
                         'PPCI': ppci_uuid,
                         'hotplug_slot': pci_dev.get('vslot', 0)
                     }
+
+                    dpci_opts = pci_dev.get('opts')
+                    if dpci_opts and len(dpci_opts) > 0:
+                        dpci_record['options'] = dpci_opts
+
                     XendDPCI(dpci_uuid, dpci_record)
 
                 target['devices'][pci_devs_uuid] = (dev_type,
@@ -1762,6 +1767,11 @@ class XendConfig(dict):
                         'PPCI': ppci_uuid,
                         'hotplug_slot': pci_dev.get('vslot', 0)
                     }
+
+                    dpci_opts = pci_dev.get('opts')
+                    if dpci_opts and len(dpci_opts) > 0:
+                        dpci_record['options'] = dpci_opts
+
                     XendDPCI(dpci_uuid, dpci_record)
 
                 self['devices'][dev_uuid] = (dev_type,

tools/python/xen/xend/XendDPCI.py

@@ -41,7 +41,8 @@ class XendDPCI(XendBase):
                   'virtual_name',
                   'VM',
                   'PPCI',
-                  'hotplug_slot']
+                  'hotplug_slot',
+                  'options']
         return XendBase.getAttrRO() + attrRO
 
     def getAttrRW(self):
@@ -119,6 +120,8 @@ class XendDPCI(XendBase):
         self.VM = record['VM']
         self.PPCI = record['PPCI']
         self.hotplug_slot = record['hotplug_slot']
+        if 'options' in record.keys():
+            self.options = record['options']
 
     def destroy(self):
         xendom = XendDomain.instance()
@@ -152,3 +155,5 @@ class XendDPCI(XendBase):
     def get_hotplug_slot(self):
         return self.hotplug_slot
 
+    def get_options(self):
+        return self.options

tools/python/xen/xend/XendDomainInfo.py

@@ -3538,6 +3538,11 @@ class XendDomainInfo:
 
         dpci_uuid = uuid.createString()
 
+        dpci_opts = []
+        opts_dict = xenapi_pci.get('options')
+        for k in opts_dict.keys():
+            dpci_opts.append([k, opts_dict[k]])
+
         # Convert xenapi to sxp
         ppci = XendAPIStore.get(xenapi_pci.get('PPCI'), 'PPCI')
 
@@ -3549,6 +3554,7 @@ class XendDomainInfo:
                     ['slot', '0x%02x' % ppci.get_slot()],
                     ['func', '0x%1x' % ppci.get_func()],
                     ['vslt', '0x%02x' % xenapi_pci.get('hotplug_slot')],
+                    ['opts', dpci_opts],
                     ['uuid', dpci_uuid]
                 ],
                 ['state', 'Initialising']

tools/python/xen/xm/create.dtd

@@ -82,11 +82,12 @@
 <!ELEMENT vtpm   (name*)>
 <!ATTLIST vtpm   backend         CDATA #REQUIRED>
 
-<!ELEMENT pci    EMPTY>
+<!ELEMENT pci    (pci_opt*)>
 <!ATTLIST pci    domain          CDATA #REQUIRED
                  bus             CDATA #REQUIRED
                  slot            CDATA #REQUIRED
                  func            CDATA #REQUIRED
+                 opts_str        CDATA #IMPLIED
                  vslt            CDATA #IMPLIED>
 
 <!ELEMENT vscsi  EMPTY>
@@ -138,6 +139,10 @@
 <!ATTLIST vcpu_param key   CDATA #REQUIRED
                      value CDATA #REQUIRED>
 
+<!ELEMENT pci_opt    EMPTY>
+<!ATTLIST pci_opt    key   CDATA #REQUIRED
+                     value CDATA #REQUIRED>
+
 <!ELEMENT other_config EMPTY>
 <!ATTLIST other_config key   CDATA #REQUIRED
                        value CDATA #REQUIRED>

tools/python/xen/xm/main.py

@@ -2499,7 +2499,8 @@ def xm_pci_attach(args):
         dpci_record = {
             "VM":           get_single_vm(dom),
             "PPCI":         target_ref,
-            "hotplug_slot": vslt
+            "hotplug_slot": vslt,
+            "options":      dict([k, v] for k, v in config_pci_opts)
         }
         server.xenapi.DPCI.create(dpci_record)
 

tools/python/xen/xm/xenapi_create.py

@@ -533,7 +533,10 @@ class xenapi_create:
             "PPCI":
                 target_ref,
             "hotplug_slot":
-                int(pci.attributes["func"].value, 16)
+                int(pci.attributes["func"].value, 16),
+            "options":
+                get_child_nodes_as_dict(pci,
+                  "pci_opt", "key", "value")
         }
 
         return server.xenapi.DPCI.create(dpci_record)
@@ -931,6 +934,12 @@ class sxp2xml:
                     = get_child_by_name(dev_sxp, "func", "0")
                 pci.attributes["vslt"] \
                     = get_child_by_name(dev_sxp, "vslt", "0")
+                for opt in get_child_by_name(dev_sxp, "opts", ""):
+                    if len(opt) > 0:
+                        pci_opt = document.createElement("pci_opt")
+                        pci_opt.attributes["key"] = opt[0]
+                        pci_opt.attributes["value"] = opt[1]
+                        pci.appendChild(pci_opt)
 
                 pcis.append(pci)