Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com> --- model/vmhostdevs.py | 96 +++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 93 insertions(+), 3 deletions(-) diff --git a/model/vmhostdevs.py b/model/vmhostdevs.py index 7051324..f643b6e 100644 --- a/model/vmhostdevs.py +++ b/model/vmhostdevs.py @@ -97,6 +97,24 @@ class VMHostDevsModel(object): return self.task.lookup(taskid) + def _get_pci_devices_xml(self, pci_infos, slot, driver): + hostdevs = '' + # all devices included in the xml will be sorted in reverse (the + # function 0 will be the last one) and will include the guest + # address details + for dev_info in sorted(pci_infos, + key=itemgetter('function'), + reverse=True): + + has_multif_flag = True if dev_info['function'] == 0 else False + + dev_info['detach_driver'] = driver + hostdevs += self._get_pci_device_xml(dev_info, + slot, + has_multif_flag) + + return '<devices>%s</devices>' % hostdevs + def _get_pci_device_xml(self, dev_info, slot, is_multifunction): if 'detach_driver' not in dev_info: dev_info['detach_driver'] = 'kvm' @@ -122,6 +140,13 @@ class VMHostDevsModel(object): function=str(dev_info['function']), multifunction='on') + else: + multi = E.address(type='pci', + domain='0', + bus='0', + slot=str(slot), + function=str(dev_info['function'])) + host_dev = E.hostdev(source, driver, multi, mode='subsystem', type='pci', managed='yes') @@ -168,7 +193,7 @@ class VMHostDevsModel(object): if free < slot: return free - return free+1 + return free + 1 def _attach_pci_device(self, cb, params): cb('Attaching PCI device') @@ -198,8 +223,7 @@ class VMHostDevsModel(object): pci_infos = [dev_model.lookup(dev_name) for dev_name in group_names] pci_infos.append(dev_info) - is_multifunction = len(pci_infos) > 1 and \ - DOM_STATE_MAP[dom.info()[0]] == "shutoff" + is_multifunction = len(pci_infos) > 1 pci_infos = sorted(pci_infos, key=itemgetter('name')) # does not allow hot-plug of 3D graphic cards @@ -234,8 +258,32 @@ class VMHostDevsModel(object): slot = 0 if is_multifunction: + # search for the first available slot in guest xml slot = self._available_slot(dom) + with RollbackContext() as rollback: + # multifunction hotplug is a special case where all functions + # must be attached together within one xml file, the same does + # not happen to multifunction coldplug - where each function is + # attached individually + if DOM_STATE_MAP[dom.info()[0]] != 'shutoff' and is_multifunction: + xmlstr = self._get_pci_devices_xml(pci_infos, slot, driver) + + try: + dom.attachDeviceFlags(xmlstr, device_flags) + + except libvirt.libvirtError: + wok_log.error( + 'Failed to attach mutifunction device VM %s: \n%s', + vmid, xmlstr) + raise + + rollback.prependDefer(dom.detachDeviceFlags, xmlstr, + device_flags) + rollback.commitAll() + cb('OK', True) + return + for pci_info in pci_infos: pci_info['detach_driver'] = driver cb('Reading source device XML') @@ -486,6 +534,14 @@ class VMHostDevModel(object): raise InvalidOperation('KCHVMHDEV0006E', {'name': dev_info['name']}) + if self._hotunplug_multifunction_pci(dom, hostdev, dev_name): + if is_3D_device: + cb('Updating MMIO from VM...') + devsmodel = VMHostDevsModel(conn=self.conn) + devsmodel.update_mmio_guest(vmid, False) + cb('OK', True) + return + for e in hostdev: if DeviceModel.deduce_dev_name(e, self.conn) == dev_name: xmlstr = etree.tostring(e) @@ -506,6 +562,40 @@ class VMHostDevModel(object): cb('OK', True) + def _get_devices_same_addr(self, hostdev, domain, bus, slot): + devices = [] + for device in hostdev: + if device.attrib['type'] != 'pci': + continue + + address = device.source.address + if int(address.attrib['domain'], 16) != domain or \ + int(address.attrib['bus'], 16) != bus or \ + int(address.attrib['slot'], 16) != slot: + continue + + devices.append(etree.tostring(device)) + + return devices + + def _hotunplug_multifunction_pci(self, dom, hostdev, dev_name): + domain, bus, slot, _ = dev_name.split('_')[1:] + # get all devices attached to the guest in the same domain+bus+slot + # that the one we are going to detach because they must be detached + # together + devices = self._get_devices_same_addr(hostdev, + int(domain, 16), + int(bus, 16), + int(slot, 16)) + if len(devices) <= 1: + return False + + devices_xml = '<devices>%s</devices>' % ''.join(devices) + dom.detachDeviceFlags(devices_xml, + get_vm_config_flag(dom, mode='all')) + + return True + def _delete_affected_pci_devices(self, dom, dev_name, pci_devs): dev_model = DeviceModel(conn=self.conn) try: -- 2.7.4