1 # Copyright (c) 2020 Cisco and/or its affiliates.
2 # Licensed under the Apache License, Version 2.0 (the "License");
3 # you may not use this file except in compliance with the License.
4 # You may obtain a copy of the License at:
6 # http://www.apache.org/licenses/LICENSE-2.0
8 # Unless required by applicable law or agreed to in writing, software
9 # distributed under the License is distributed on an "AS IS" BASIS,
10 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 # See the License for the specific language governing permissions and
12 # limitations under the License.
14 """QEMU utilities library."""
19 from string import Template
20 from time import sleep
22 from robot.api import logger
24 from resources.libraries.python.Constants import Constants
25 from resources.libraries.python.DpdkUtil import DpdkUtil
26 from resources.libraries.python.DUTSetup import DUTSetup
27 from resources.libraries.python.OptionString import OptionString
28 from resources.libraries.python.ssh import exec_cmd, exec_cmd_no_error
29 from resources.libraries.python.topology import NodeType, Topology
30 from resources.libraries.python.VppConfigGenerator import VppConfigGenerator
32 __all__ = [u"QemuUtils"]
38 # Use one instance of class per tests.
39 ROBOT_LIBRARY_SCOPE = u"TEST CASE"
42 self, node, qemu_id=1, smp=1, mem=512, vnf=None,
43 img=Constants.QEMU_VM_IMAGE):
44 """Initialize QemuUtil class.
46 :param node: Node to run QEMU on.
47 :param qemu_id: QEMU identifier.
48 :param smp: Number of virtual SMP units (cores).
49 :param mem: Amount of memory.
50 :param vnf: Network function workload.
51 :param img: QEMU disk image or kernel image path.
61 self._arch = Topology.get_node_arch(self._node)
64 # Architecture specific options
65 if self._arch == u"aarch64":
66 dpdk_target = u"arm64-armv8a"
67 self._opt[u"machine_args"] = \
68 u"virt,accel=kvm,usb=off,mem-merge=off,gic-version=3"
69 self._opt[u"console"] = u"ttyAMA0"
71 dpdk_target = u"x86_64-native"
72 self._opt[u"machine_args"] = u"pc,accel=kvm,usb=off,mem-merge=off"
73 self._opt[u"console"] = u"ttyS0"
74 self._testpmd_path = f"{Constants.QEMU_VM_DPDK}/" \
75 f"{dpdk_target}-linux-gcc/app"
77 u"host": node[u"host"],
79 u"port": 10021 + qemu_id,
80 u"serial": 4555 + qemu_id,
85 if node[u"port"] != 22:
86 self._vm_info[u"host_port"] = node[u"port"]
87 self._vm_info[u"host_username"] = node[u"username"]
88 self._vm_info[u"host_password"] = node[u"password"]
90 self._opt[u"qemu_id"] = qemu_id
91 self._opt[u"mem"] = int(mem)
92 self._opt[u"smp"] = int(smp)
93 self._opt[u"img"] = img
94 self._opt[u"vnf"] = vnf
97 self._temp[u"log"] = f"/tmp/serial_{qemu_id}.log"
98 self._temp[u"pidfile"] = f"/run/qemu_{qemu_id}.pid"
99 if img == Constants.QEMU_VM_IMAGE:
100 self._temp[u"qmp"] = f"/run/qmp_{qemu_id}.sock"
101 self._temp[u"qga"] = f"/run/qga_{qemu_id}.sock"
102 elif img == Constants.QEMU_VM_KERNEL:
103 self._opt[u"img"], _ = exec_cmd_no_error(
104 node, f"ls -1 {Constants.QEMU_VM_KERNEL}* | tail -1",
105 message=u"Qemu Kernel VM image not found!"
107 self._temp[u"ini"] = f"/etc/vm_init_{qemu_id}.conf"
108 self._opt[u"initrd"], _ = exec_cmd_no_error(
109 node, f"ls -1 {Constants.QEMU_VM_KERNEL_INITRD}* | tail -1",
110 message=u"Qemu Kernel initrd image not found!"
113 raise RuntimeError(f"QEMU: Unknown VM image option: {img}")
114 # Computed parameters for QEMU command line.
115 self._params = OptionString(prefix=u"-")
117 def add_default_params(self):
118 """Set default QEMU command line parameters."""
119 self._params.add(u"daemonize")
120 self._params.add(u"nodefaults")
121 self._params.add_with_value(
122 u"name", f"vnf{self._opt.get(u'qemu_id')},debug-threads=on"
124 self._params.add(u"no-user-config")
125 self._params.add(u"nographic")
126 self._params.add(u"enable-kvm")
127 self._params.add_with_value(u"pidfile", self._temp.get(u"pidfile"))
128 self._params.add_with_value(u"cpu", u"host")
130 self._params.add_with_value(u"machine", self._opt.get(u"machine_args"))
131 self._params.add_with_value(
132 u"smp", f"{self._opt.get(u'smp')},sockets=1,"
133 f"cores={self._opt.get(u'smp')},threads=1"
135 self._params.add_with_value(
136 u"object", f"memory-backend-file,id=mem,"
137 f"size={self._opt.get(u'mem')}M,mem-path=/dev/hugepages,share=on"
139 self._params.add_with_value(u"m", f"{self._opt.get(u'mem')}M")
140 self._params.add_with_value(u"numa", u"node,memdev=mem")
141 self._params.add_with_value(u"balloon", u"none")
143 def add_net_user(self):
144 """Set managment port forwarding."""
145 self._params.add_with_value(
146 u"netdev", f"user,id=mgmt,net=172.16.255.0/24,"
147 f"hostfwd=tcp::{self._vm_info[u'port']}-:22"
149 self._params.add_with_value(
150 u"device", f"virtio-net,netdev=mgmt"
153 def add_qmp_qga(self):
154 """Set QMP, QGA management."""
155 self._params.add_with_value(
156 u"chardev", f"socket,path={self._temp.get(u'qga')},"
157 f"server,nowait,id=qga0"
159 self._params.add_with_value(u"device", u"isa-serial,chardev=qga0")
160 self._params.add_with_value(
161 u"qmp", f"unix:{self._temp.get(u'qmp')},server,nowait"
164 def add_serial(self):
165 """Set serial to file redirect."""
166 self._params.add_with_value(
167 u"chardev", f"socket,host=127.0.0.1,"
168 f"port={self._vm_info[u'serial']},id=gnc0,server,nowait")
169 self._params.add_with_value(u"device", u"isa-serial,chardev=gnc0")
170 self._params.add_with_value(
171 u"serial", f"file:{self._temp.get(u'log')}"
174 def add_drive_cdrom(self, drive_file, index=None):
177 :param drive_file: Path to drive image.
178 :param index: Drive index.
179 :type drive_file: str
182 index = f"index={index}," if index else u""
183 self._params.add_with_value(
184 u"drive", f"file={drive_file},{index}media=cdrom"
187 def add_drive(self, drive_file, drive_format):
188 """Set drive with custom format.
190 :param drive_file: Path to drive image.
191 :param drive_format: Drive image format.
192 :type drive_file: str
193 :type drive_format: str
195 self._params.add_with_value(
196 u"drive", f"file={drive_file},format={drive_format},"
197 u"cache=none,if=virtio,file.locking=off"
200 def add_kernelvm_params(self):
201 """Set KernelVM QEMU parameters."""
202 self._params.add_with_value(
203 u"serial", f"file:{self._temp.get(u'log')}"
205 self._params.add_with_value(
206 u"fsdev", u"local,id=root9p,path=/,security_model=none"
208 self._params.add_with_value(
209 u"device", u"virtio-9p-pci,fsdev=root9p,mount_tag=virtioroot"
211 self._params.add_with_value(u"kernel", f"{self._opt.get(u'img')}")
212 self._params.add_with_value(u"initrd", f"{self._opt.get(u'initrd')}")
213 self._params.add_with_value(
214 u"append", f"'ro rootfstype=9p rootflags=trans=virtio "
215 f"root=virtioroot console={self._opt.get(u'console')} "
216 f"tsc=reliable hugepages=512 "
217 f"init={self._temp.get(u'ini')} fastboot'"
220 def add_vhost_user_if(
221 self, socket, server=True, jumbo_frames=False, queue_size=None,
222 queues=1, csum=False, gso=False):
223 """Add Vhost-user interface.
225 :param socket: Path of the unix socket.
226 :param server: If True the socket shall be a listening socket.
227 :param jumbo_frames: Set True if jumbo frames are used in the test.
228 :param queue_size: Vring queue size.
229 :param queues: Number of queues.
230 :param csum: Checksum offloading.
231 :param gso: Generic segmentation offloading.
234 :type jumbo_frames: bool
235 :type queue_size: int
241 self._params.add_with_value(
242 u"chardev", f"socket,id=char{self._nic_id},"
243 f"path={socket}{u',server' if server is True else u''}"
245 self._params.add_with_value(
246 u"netdev", f"vhost-user,id=vhost{self._nic_id},"
247 f"chardev=char{self._nic_id},queues={queues}"
249 mac = f"52:54:00:00:{self._opt.get(u'qemu_id'):02x}:" \
250 f"{self._nic_id:02x}"
251 queue_size = f"rx_queue_size={queue_size},tx_queue_size={queue_size}" \
252 if queue_size else u""
253 self._params.add_with_value(
254 u"device", f"virtio-net-pci,netdev=vhost{self._nic_id},mac={mac},"
255 f"addr={self._nic_id+5}.0,mq=on,vectors={2 * queues + 2},"
256 f"csum={u'on' if csum else u'off'},gso={u'on' if gso else u'off'},"
257 f"guest_tso4=off,guest_tso6=off,guest_ecn=off,"
261 # Add interface MAC and socket to the node dict.
262 if_data = {u"mac_address": mac, u"socket": socket}
263 if_name = f"vhost{self._nic_id}"
264 self._vm_info[u"interfaces"][if_name] = if_data
265 # Add socket to temporary file list.
266 self._temp[if_name] = socket
268 def add_vfio_pci_if(self, pci):
269 """Add VFIO PCI interface.
271 :param pci: PCI address of interface.
275 self._params.add_with_value(
276 u"device", f"vfio-pci,host={pci},addr={self._nic_id+5}.0"
279 def create_kernelvm_config_vpp(self, **kwargs):
280 """Create QEMU VPP config files.
282 :param kwargs: Key-value pairs to replace content of VPP configuration
286 startup = f"/etc/vpp/vm_startup_{self._opt.get(u'qemu_id')}.conf"
287 running = f"/etc/vpp/vm_running_{self._opt.get(u'qemu_id')}.exec"
289 self._temp[u"startup"] = startup
290 self._temp[u"running"] = running
291 self._opt[u"vnf_bin"] = f"/usr/bin/vpp -c {startup}"
293 # Create VPP startup configuration.
294 vpp_config = VppConfigGenerator()
295 vpp_config.set_node(self._node)
296 vpp_config.add_unix_nodaemon()
297 vpp_config.add_unix_cli_listen()
298 vpp_config.add_unix_exec(running)
299 vpp_config.add_socksvr()
300 vpp_config.add_main_heap_size(u"512M")
301 vpp_config.add_main_heap_page_size(u"2M")
302 vpp_config.add_statseg_size(u"512M")
303 vpp_config.add_statseg_page_size(u"2M")
304 vpp_config.add_statseg_per_node_counters(u"on")
305 vpp_config.add_buffers_per_numa(107520)
306 vpp_config.add_cpu_main_core(u"0")
307 if self._opt.get(u"smp") > 1:
308 vpp_config.add_cpu_corelist_workers(f"1-{self._opt.get(u'smp')-1}")
309 vpp_config.add_plugin(u"disable", u"default")
310 vpp_config.add_plugin(u"enable", u"ping_plugin.so")
311 if "2vfpt" in self._opt.get(u'vnf'):
312 vpp_config.add_plugin(u"enable", u"avf_plugin.so")
313 if "vhost" in self._opt.get(u'vnf'):
314 vpp_config.add_plugin(u"enable", u"dpdk_plugin.so")
315 vpp_config.add_dpdk_dev(u"0000:00:06.0", u"0000:00:07.0")
316 vpp_config.add_dpdk_dev_default_rxq(kwargs[u"queues"])
317 vpp_config.add_dpdk_log_level(u"debug")
318 if not kwargs[u"jumbo_frames"]:
319 vpp_config.add_dpdk_no_multi_seg()
320 vpp_config.add_dpdk_no_tx_checksum_offload()
321 if "ipsec" in self._opt.get(u'vnf'):
322 vpp_config.add_plugin(u"enable", u"crypto_native_plugin.so")
323 vpp_config.add_plugin(u"enable", u"crypto_ipsecmb_plugin.so")
324 vpp_config.add_plugin(u"enable", u"crypto_openssl_plugin.so")
325 if "nat" in self._opt.get(u'vnf'):
326 vpp_config.add_nat(value=u"endpoint-dependent")
327 vpp_config.add_plugin(u"enable", u"nat_plugin.so")
328 vpp_config.write_config(startup)
330 # Create VPP running configuration.
331 template = f"{Constants.RESOURCES_TPL}/vm/{self._opt.get(u'vnf')}.exec"
332 exec_cmd_no_error(self._node, f"rm -f {running}", sudo=True)
334 with open(template, u"rt") as src_file:
335 src = Template(src_file.read())
337 self._node, f"echo '{src.safe_substitute(**kwargs)}' | "
338 f"sudo tee {running}"
341 def create_kernelvm_config_testpmd_io(self, **kwargs):
342 """Create QEMU testpmd-io command line.
344 :param kwargs: Key-value pairs to construct command line parameters.
347 pmd_max_pkt_len = u"9200" if kwargs[u"jumbo_frames"] else u"1518"
348 testpmd_cmd = DpdkUtil.get_testpmd_cmdline(
349 eal_corelist=f"0-{self._opt.get(u'smp') - 1}",
351 eal_pci_whitelist0=u"0000:00:06.0",
352 eal_pci_whitelist1=u"0000:00:07.0",
358 pmd_max_pkt_len=pmd_max_pkt_len,
359 pmd_mbuf_size=u"16384",
360 pmd_rxq=kwargs[u"queues"],
361 pmd_txq=kwargs[u"queues"],
362 pmd_tx_offloads='0x0',
363 pmd_nb_cores=str(self._opt.get(u"smp") - 1)
366 self._opt[u"vnf_bin"] = f"{self._testpmd_path}/{testpmd_cmd}"
368 def create_kernelvm_config_testpmd_mac(self, **kwargs):
369 """Create QEMU testpmd-mac command line.
371 :param kwargs: Key-value pairs to construct command line parameters.
374 pmd_max_pkt_len = u"9200" if kwargs[u"jumbo_frames"] else u"1518"
375 testpmd_cmd = DpdkUtil.get_testpmd_cmdline(
376 eal_corelist=f"0-{self._opt.get(u'smp') - 1}",
378 eal_pci_whitelist0=u"0000:00:06.0",
379 eal_pci_whitelist1=u"0000:00:07.0",
385 pmd_max_pkt_len=pmd_max_pkt_len,
386 pmd_mbuf_size=u"16384",
387 pmd_eth_peer_0=f"0,{kwargs[u'vif1_mac']}",
388 pmd_eth_peer_1=f"1,{kwargs[u'vif2_mac']}",
389 pmd_rxq=kwargs[u"queues"],
390 pmd_txq=kwargs[u"queues"],
391 pmd_tx_offloads=u"0x0",
392 pmd_nb_cores=str(self._opt.get(u"smp") - 1)
395 self._opt[u"vnf_bin"] = f"{self._testpmd_path}/{testpmd_cmd}"
397 def create_kernelvm_init(self, **kwargs):
398 """Create QEMU init script.
400 :param kwargs: Key-value pairs to replace content of init startup file.
403 template = f"{Constants.RESOURCES_TPL}/vm/init.sh"
404 init = self._temp.get(u"ini")
405 exec_cmd_no_error(self._node, f"rm -f {init}", sudo=True)
407 with open(template, u"rt") as src_file:
408 src = Template(src_file.read())
410 self._node, f"echo '{src.safe_substitute(**kwargs)}' | "
413 exec_cmd_no_error(self._node, f"chmod +x {init}", sudo=True)
415 def configure_kernelvm_vnf(self, **kwargs):
416 """Create KernelVM VNF configurations.
418 :param kwargs: Key-value pairs for templating configs.
421 if u"vpp" in self._opt.get(u"vnf"):
422 self.create_kernelvm_config_vpp(**kwargs)
423 self.create_kernelvm_init(vnf_bin=self._opt.get(u"vnf_bin"))
424 elif u"testpmd_io" in self._opt.get(u"vnf"):
425 self.create_kernelvm_config_testpmd_io(**kwargs)
426 self.create_kernelvm_init(vnf_bin=self._opt.get(u"vnf_bin"))
427 elif u"testpmd_mac" in self._opt.get(u"vnf"):
428 self.create_kernelvm_config_testpmd_mac(**kwargs)
429 self.create_kernelvm_init(vnf_bin=self._opt.get(u"vnf_bin"))
431 raise RuntimeError(u"QEMU: Unsupported VNF!")
433 def get_qemu_pids(self):
434 """Get QEMU CPU pids.
436 :returns: List of QEMU CPU pids.
439 command = f"grep -rwl 'CPU' /proc/$(sudo cat " \
440 f"{self._temp.get(u'pidfile')})/task/*/comm "
441 command += r"| xargs dirname | sed -e 's/\/.*\///g' | uniq"
443 stdout, _ = exec_cmd_no_error(self._node, command)
444 return stdout.splitlines()
446 def qemu_set_affinity(self, *host_cpus):
447 """Set qemu affinity by getting thread PIDs via QMP and taskset to list
448 of CPU cores. Function tries to execute 3 times to avoid race condition
449 in getting thread PIDs.
451 :param host_cpus: List of CPU cores.
452 :type host_cpus: list
456 qemu_cpus = self.get_qemu_pids()
458 if len(qemu_cpus) != len(host_cpus):
461 for qemu_cpu, host_cpu in zip(qemu_cpus, host_cpus):
462 command = f"taskset -pc {host_cpu} {qemu_cpu}"
463 message = f"QEMU: Set affinity failed " \
464 f"on {self._node[u'host']}!"
466 self._node, command, sudo=True, message=message
469 except (RuntimeError, ValueError):
474 raise RuntimeError(u"Failed to set Qemu threads affinity!")
476 def qemu_set_scheduler_policy(self):
477 """Set scheduler policy to SCHED_RR with priority 1 for all Qemu CPU
480 :raises RuntimeError: Set scheduler policy failed.
483 qemu_cpus = self.get_qemu_pids()
485 for qemu_cpu in qemu_cpus:
486 command = f"chrt -r -p 1 {qemu_cpu}"
487 message = f"QEMU: Set SCHED_RR failed on {self._node[u'host']}"
489 self._node, command, sudo=True, message=message
491 except (RuntimeError, ValueError):
495 def _qemu_qmp_exec(self, cmd):
496 """Execute QMP command.
498 QMP is JSON based protocol which allows to control QEMU instance.
500 :param cmd: QMP command to execute.
502 :returns: Command output in python representation of JSON format. The
503 { "return": {} } response is QMP's success response. An error
504 response will contain the "error" keyword instead of "return".
506 # To enter command mode, the qmp_capabilities command must be issued.
507 command = f"echo \"{{{{ \\\"execute\\\": " \
508 f"\\\"qmp_capabilities\\\" }}}}" \
509 f"{{{{ \\\"execute\\\": \\\"{cmd}\\\" }}}}\" | " \
510 f"sudo -S socat - UNIX-CONNECT:{self._temp.get(u'qmp')}"
511 message = f"QMP execute '{cmd}' failed on {self._node[u'host']}"
513 stdout, _ = exec_cmd_no_error(
514 self._node, command, sudo=False, message=message
517 # Skip capabilities negotiation messages.
518 out_list = stdout.splitlines()
519 if len(out_list) < 3:
520 raise RuntimeError(f"Invalid QMP output on {self._node[u'host']}")
521 return json.loads(out_list[2])
523 def _qemu_qga_flush(self):
524 """Flush the QGA parser state."""
525 command = f"(printf \"\xFF\"; sleep 1) | sudo -S socat " \
526 f"- UNIX-CONNECT:{self._temp.get(u'qga')}"
527 message = f"QGA flush failed on {self._node[u'host']}"
528 stdout, _ = exec_cmd_no_error(
529 self._node, command, sudo=False, message=message
532 return json.loads(stdout.split(u"\n", 1)[0]) if stdout else dict()
534 def _qemu_qga_exec(self, cmd):
535 """Execute QGA command.
537 QGA provide access to a system-level agent via standard QMP commands.
539 :param cmd: QGA command to execute.
542 command = f"(echo \"{{{{ \\\"execute\\\": " \
543 f"\\\"{cmd}\\\" }}}}\"; sleep 1) | " \
544 f"sudo -S socat - UNIX-CONNECT:{self._temp.get(u'qga')}"
545 message = f"QGA execute '{cmd}' failed on {self._node[u'host']}"
546 stdout, _ = exec_cmd_no_error(
547 self._node, command, sudo=False, message=message
550 return json.loads(stdout.split(u"\n", 1)[0]) if stdout else dict()
552 def _wait_until_vm_boot(self):
553 """Wait until QEMU VM is booted."""
555 getattr(self, f'_wait_{self._opt["vnf"]}')()
556 except AttributeError:
559 def _wait_default(self, retries=60):
560 """Wait until QEMU with VPP is booted.
562 :param retries: Number of retries.
565 for _ in range(retries):
566 command = f"tail -1 {self._temp.get(u'log')}"
569 stdout, _ = exec_cmd_no_error(self._node, command, sudo=True)
573 if "vpp " in stdout and "built by" in stdout:
575 if u"Press enter to exit" in stdout:
577 if u"reboot: Power down" in stdout:
579 f"QEMU: NF failed to run on {self._node[u'host']}!"
583 f"QEMU: Timeout, VM not booted on {self._node[u'host']}!"
586 def _wait_nestedvm(self, retries=12):
587 """Wait until QEMU with NestedVM is booted.
589 First try to flush qga until there is output.
590 Then ping QEMU guest agent each 5s until VM booted or timeout.
592 :param retries: Number of retries with 5s between trials.
595 for _ in range(retries):
598 out = self._qemu_qga_flush()
600 logger.trace(f"QGA qga flush unexpected output {out}")
601 # Empty output - VM not booted yet
608 f"QEMU: Timeout, VM not booted on {self._node[u'host']}!"
610 for _ in range(retries):
613 out = self._qemu_qga_exec(u"guest-ping")
615 logger.trace(f"QGA guest-ping unexpected output {out}")
616 # Empty output - VM not booted yet.
619 # Non-error return - VM booted.
620 elif out.get(u"return") is not None:
622 # Skip error and wait.
623 elif out.get(u"error") is not None:
626 # If there is an unexpected output from QGA guest-info, try
627 # again until timeout.
628 logger.trace(f"QGA guest-ping unexpected output {out}")
631 f"QEMU: Timeout, VM not booted on {self._node[u'host']}!"
634 def _update_vm_interfaces(self):
635 """Update interface names in VM node dict."""
636 # Send guest-network-get-interfaces command via QGA, output example:
637 # {"return": [{"name": "eth0", "hardware-address": "52:54:00:00:04:01"},
638 # {"name": "eth1", "hardware-address": "52:54:00:00:04:02"}]}.
639 out = self._qemu_qga_exec(u"guest-network-get-interfaces")
640 interfaces = out.get(u"return")
644 f"Get VM interface list failed on {self._node[u'host']}"
646 # Create MAC-name dict.
647 for interface in interfaces:
648 if u"hardware-address" not in interface:
650 mac_name[interface[u"hardware-address"]] = interface[u"name"]
651 # Match interface by MAC and save interface name.
652 for interface in self._vm_info[u"interfaces"].values():
653 mac = interface.get(u"mac_address")
654 if_name = mac_name.get(mac)
656 logger.trace(f"Interface name for MAC {mac} not found")
658 interface[u"name"] = if_name
660 def qemu_start(self):
661 """Start QEMU and wait until VM boot.
663 :returns: VM node info.
666 cmd_opts = OptionString()
667 cmd_opts.add(f"{Constants.QEMU_BIN_PATH}/qemu-system-{self._arch}")
668 cmd_opts.extend(self._params)
669 message = f"QEMU: Start failed on {self._node[u'host']}!"
671 DUTSetup.check_huge_page(
672 self._node, u"/dev/hugepages", int(self._opt.get(u"mem")))
675 self._node, cmd_opts, timeout=300, sudo=True, message=message
677 self._wait_until_vm_boot()
684 """Kill qemu process."""
686 self._node, f"chmod +r {self._temp.get(u'pidfile')}", sudo=True
689 self._node, f"kill -SIGKILL $(cat {self._temp.get(u'pidfile')})",
693 for value in self._temp.values():
694 exec_cmd(self._node, f"cat {value}", sudo=True)
695 exec_cmd(self._node, f"rm -f {value}", sudo=True)
697 def qemu_kill_all(self):
698 """Kill all qemu processes on DUT node if specified."""
699 exec_cmd(self._node, u"pkill -SIGKILL qemu", sudo=True)
701 for value in self._temp.values():
702 exec_cmd(self._node, f"cat {value}", sudo=True)
703 exec_cmd(self._node, f"rm -f {value}", sudo=True)
705 def qemu_version(self):
706 """Return Qemu version.
708 :returns: Qemu version.
711 command = f"{Constants.QEMU_BIN_PATH}/qemu-system-{self._arch} " \
714 stdout, _ = exec_cmd_no_error(self._node, command, sudo=True)
715 return match(r"QEMU emulator version ([\d.]*)", stdout).group(1)