1 # Copyright 2015 Intel Corporation.
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
15 """Automation of QEMU hypervisor for launching vhost-user enabled guests.
20 from conf import settings as S
21 from conf import get_test_param
22 from vnfs.qemu.qemu import IVnfQemu
24 class QemuDpdkVhostUser(IVnfQemu):
26 Control an instance of QEMU with vHost user guest communication.
30 Initialisation function.
32 super(QemuDpdkVhostUser, self).__init__()
33 self._logger = logging.getLogger(__name__)
36 guest_nic_queues = int(get_test_param('guest_nic_queues', 0))
38 override_list = [guest_nic_queues] * (self._number + 1)
39 S.setValue('GUEST_NIC_QUEUES', override_list)
40 if int(S.getValue('GUEST_NIC_QUEUES')[self._number]):
41 queue_str = ',queues={}'.format(S.getValue('GUEST_NIC_QUEUES')[self._number])
42 mq_vector_str = ',mq=on,vectors={}'.format(
43 int(S.getValue('GUEST_NIC_QUEUES')[self._number]) * 2 + 2)
45 queue_str, mq_vector_str = '', ''
47 # Guest merge buffer setting
48 if S.getValue('GUEST_NIC_MERGE_BUFFERS_DISABLE')[self._number]:
49 merge_buff = 'mrg_rxbuf=off,'
53 # calculate index of first interface, i.e. check how many
54 # interfaces has been created for previous VMs, where 1st NIC
55 # of 1st VM has index 0
56 start_index = sum(S.getValue('GUEST_NICS_NR')[:self._number])
58 # setup requested number of interfaces
59 for nic in range(len(self._nics)):
60 index = start_index + nic
62 net = 'net' + str(index + 1)
64 self._cmd += ['-chardev',
65 'socket,id=char' + ifi +
66 ',path=' + S.getValue('TOOLS')['ovs_var_tmp'] +
67 'dpdkvhostuser' + ifi,
69 'type=vhost-user,id=' + net +
70 ',chardev=char' + ifi + ',vhostforce' + queue_str,
72 'virtio-net-pci,mac=' +
73 self._nics[nic]['mac'] +
74 ',netdev=' + net + ',csum=off,' + merge_buff +
76 'guest_tso4=off,guest_tso6=off,guest_ecn=off' +