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=256 "
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._vhost_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._vhost_id},"
247 f"chardev=char{self._vhost_id},queues={queues}"
249 mac = f"52:54:00:00:{self._opt.get(u'qemu_id'):02x}:" \
250 f"{self._vhost_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._vhost_id},mac={mac},"
255 f"addr={self._vhost_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._vhost_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.
274 self._params.add_with_value(u"device", f"vfio-pci,host={pci}")
276 def create_kernelvm_config_vpp(self, **kwargs):
277 """Create QEMU VPP config files.
279 :param kwargs: Key-value pairs to replace content of VPP configuration
283 startup = f"/etc/vpp/vm_startup_{self._opt.get(u'qemu_id')}.conf"
284 running = f"/etc/vpp/vm_running_{self._opt.get(u'qemu_id')}.exec"
286 self._temp[u"startup"] = startup
287 self._temp[u"running"] = running
288 self._opt[u"vnf_bin"] = f"/usr/bin/vpp -c {startup}"
290 # Create VPP startup configuration.
291 vpp_config = VppConfigGenerator()
292 vpp_config.set_node(self._node)
293 vpp_config.add_unix_nodaemon()
294 vpp_config.add_unix_cli_listen()
295 vpp_config.add_unix_exec(running)
296 vpp_config.add_socksvr()
297 vpp_config.add_statseg_per_node_counters(value=u"on")
298 vpp_config.add_buffers_per_numa(107520)
299 vpp_config.add_heapsize(u"1G")
300 vpp_config.add_ip_heap_size(u"1G")
301 vpp_config.add_statseg_size(u"1G")
302 vpp_config.add_cpu_main_core(u"0")
303 if self._opt.get(u"smp") > 1:
304 vpp_config.add_cpu_corelist_workers(f"1-{self._opt.get(u'smp')-1}")
305 vpp_config.add_plugin(u"disable", u"default")
306 vpp_config.add_plugin(u"enable", u"ping_plugin.so")
307 if "2vfpt" in self._opt.get(u'vnf'):
308 vpp_config.add_plugin(u"enable", u"avf_plugin.so")
309 if "vhost" in self._opt.get(u'vnf'):
310 vpp_config.add_plugin(u"enable", u"dpdk_plugin.so")
311 vpp_config.add_dpdk_dev(u"0000:00:06.0", u"0000:00:07.0")
312 vpp_config.add_dpdk_dev_default_rxq(kwargs[u"queues"])
313 vpp_config.add_dpdk_log_level(u"debug")
314 if not kwargs[u"jumbo_frames"]:
315 vpp_config.add_dpdk_no_multi_seg()
316 vpp_config.add_dpdk_no_tx_checksum_offload()
317 if "ipsec" in self._opt.get(u'vnf'):
318 vpp_config.add_plugin(u"enable", u"crypto_native_plugin.so")
319 vpp_config.add_plugin(u"enable", u"crypto_ipsecmb_plugin.so")
320 vpp_config.add_plugin(u"enable", u"crypto_openssl_plugin.so")
321 if "nat" in self._opt.get(u'vnf'):
322 vpp_config.add_nat(value=u"endpoint-dependent")
323 vpp_config.add_nat_max_translations_per_thread(value=655360)
324 vpp_config.add_plugin(u"enable", u"nat_plugin.so")
325 vpp_config.write_config(startup)
327 # Create VPP running configuration.
328 template = f"{Constants.RESOURCES_TPL_VM}/{self._opt.get(u'vnf')}.exec"
329 exec_cmd_no_error(self._node, f"rm -f {running}", sudo=True)
331 with open(template, u"rt") as src_file:
332 src = Template(src_file.read())
334 self._node, f"echo '{src.safe_substitute(**kwargs)}' | "
335 f"sudo tee {running}"
338 def create_kernelvm_config_testpmd_io(self, **kwargs):
339 """Create QEMU testpmd-io command line.
341 :param kwargs: Key-value pairs to construct command line parameters.
344 pmd_max_pkt_len = u"9200" if kwargs[u"jumbo_frames"] else u"1518"
345 testpmd_cmd = DpdkUtil.get_testpmd_cmdline(
346 eal_corelist=f"0-{self._opt.get(u'smp') - 1}",
348 eal_pci_whitelist0=u"0000:00:06.0",
349 eal_pci_whitelist1=u"0000:00:07.0",
355 pmd_max_pkt_len=pmd_max_pkt_len,
356 pmd_mbuf_size=u"16384",
357 pmd_rxq=kwargs[u"queues"],
358 pmd_txq=kwargs[u"queues"],
359 pmd_tx_offloads='0x0',
360 pmd_nb_cores=str(self._opt.get(u"smp") - 1)
363 self._opt[u"vnf_bin"] = f"{self._testpmd_path}/{testpmd_cmd}"
365 def create_kernelvm_config_testpmd_mac(self, **kwargs):
366 """Create QEMU testpmd-mac command line.
368 :param kwargs: Key-value pairs to construct command line parameters.
371 pmd_max_pkt_len = u"9200" if kwargs[u"jumbo_frames"] else u"1518"
372 testpmd_cmd = DpdkUtil.get_testpmd_cmdline(
373 eal_corelist=f"0-{self._opt.get(u'smp') - 1}",
375 eal_pci_whitelist0=u"0000:00:06.0",
376 eal_pci_whitelist1=u"0000:00:07.0",
382 pmd_max_pkt_len=pmd_max_pkt_len,
383 pmd_mbuf_size=u"16384",
384 pmd_eth_peer_0=f"0,{kwargs[u'vif1_mac']}",
385 pmd_eth_peer_1=f"1,{kwargs[u'vif2_mac']}",
386 pmd_rxq=kwargs[u"queues"],
387 pmd_txq=kwargs[u"queues"],
388 pmd_tx_offloads=u"0x0",
389 pmd_nb_cores=str(self._opt.get(u"smp") - 1)
392 self._opt[u"vnf_bin"] = f"{self._testpmd_path}/{testpmd_cmd}"
394 def create_kernelvm_init(self, **kwargs):
395 """Create QEMU init script.
397 :param kwargs: Key-value pairs to replace content of init startup file.
400 template = f"{Constants.RESOURCES_TPL_VM}/init.sh"
401 init = self._temp.get(u"ini")
402 exec_cmd_no_error(self._node, f"rm -f {init}", sudo=True)
404 with open(template, u"rt") as src_file:
405 src = Template(src_file.read())
407 self._node, f"echo '{src.safe_substitute(**kwargs)}' | "
410 exec_cmd_no_error(self._node, f"chmod +x {init}", sudo=True)
412 def configure_kernelvm_vnf(self, **kwargs):
413 """Create KernelVM VNF configurations.
415 :param kwargs: Key-value pairs for templating configs.
418 if u"vpp" in self._opt.get(u"vnf"):
419 self.create_kernelvm_config_vpp(**kwargs)
420 self.create_kernelvm_init(vnf_bin=self._opt.get(u"vnf_bin"))
421 elif u"testpmd_io" in self._opt.get(u"vnf"):
422 self.create_kernelvm_config_testpmd_io(**kwargs)
423 self.create_kernelvm_init(vnf_bin=self._opt.get(u"vnf_bin"))
424 elif u"testpmd_mac" in self._opt.get(u"vnf"):
425 self.create_kernelvm_config_testpmd_mac(**kwargs)
426 self.create_kernelvm_init(vnf_bin=self._opt.get(u"vnf_bin"))
428 raise RuntimeError(u"QEMU: Unsupported VNF!")
430 def get_qemu_pids(self):
431 """Get QEMU CPU pids.
433 :returns: List of QEMU CPU pids.
436 command = f"grep -rwl 'CPU' /proc/$(sudo cat " \
437 f"{self._temp.get(u'pidfile')})/task/*/comm "
438 command += r"| xargs dirname | sed -e 's/\/.*\///g' | uniq"
440 stdout, _ = exec_cmd_no_error(self._node, command)
441 return stdout.splitlines()
443 def qemu_set_affinity(self, *host_cpus):
444 """Set qemu affinity by getting thread PIDs via QMP and taskset to list
445 of CPU cores. Function tries to execute 3 times to avoid race condition
446 in getting thread PIDs.
448 :param host_cpus: List of CPU cores.
449 :type host_cpus: list
453 qemu_cpus = self.get_qemu_pids()
455 if len(qemu_cpus) != len(host_cpus):
458 for qemu_cpu, host_cpu in zip(qemu_cpus, host_cpus):
459 command = f"taskset -pc {host_cpu} {qemu_cpu}"
460 message = f"QEMU: Set affinity failed " \
461 f"on {self._node[u'host']}!"
463 self._node, command, sudo=True, message=message
466 except (RuntimeError, ValueError):
471 raise RuntimeError(u"Failed to set Qemu threads affinity!")
473 def qemu_set_scheduler_policy(self):
474 """Set scheduler policy to SCHED_RR with priority 1 for all Qemu CPU
477 :raises RuntimeError: Set scheduler policy failed.
480 qemu_cpus = self.get_qemu_pids()
482 for qemu_cpu in qemu_cpus:
483 command = f"chrt -r -p 1 {qemu_cpu}"
484 message = f"QEMU: Set SCHED_RR failed on {self._node[u'host']}"
486 self._node, command, sudo=True, message=message
488 except (RuntimeError, ValueError):
492 def _qemu_qmp_exec(self, cmd):
493 """Execute QMP command.
495 QMP is JSON based protocol which allows to control QEMU instance.
497 :param cmd: QMP command to execute.
499 :returns: Command output in python representation of JSON format. The
500 { "return": {} } response is QMP's success response. An error
501 response will contain the "error" keyword instead of "return".
503 # To enter command mode, the qmp_capabilities command must be issued.
504 command = f"echo \"{{{{ \\\"execute\\\": " \
505 f"\\\"qmp_capabilities\\\" }}}}" \
506 f"{{{{ \\\"execute\\\": \\\"{cmd}\\\" }}}}\" | " \
507 f"sudo -S socat - UNIX-CONNECT:{self._temp.get(u'qmp')}"
508 message = f"QMP execute '{cmd}' failed on {self._node[u'host']}"
510 stdout, _ = exec_cmd_no_error(
511 self._node, command, sudo=False, message=message
514 # Skip capabilities negotiation messages.
515 out_list = stdout.splitlines()
516 if len(out_list) < 3:
517 raise RuntimeError(f"Invalid QMP output on {self._node[u'host']}")
518 return json.loads(out_list[2])
520 def _qemu_qga_flush(self):
521 """Flush the QGA parser state."""
522 command = f"(printf \"\xFF\"; sleep 1) | sudo -S socat " \
523 f"- UNIX-CONNECT:{self._temp.get(u'qga')}"
524 message = f"QGA flush failed on {self._node[u'host']}"
525 stdout, _ = exec_cmd_no_error(
526 self._node, command, sudo=False, message=message
529 return json.loads(stdout.split(u"\n", 1)[0]) if stdout else dict()
531 def _qemu_qga_exec(self, cmd):
532 """Execute QGA command.
534 QGA provide access to a system-level agent via standard QMP commands.
536 :param cmd: QGA command to execute.
539 command = f"(echo \"{{{{ \\\"execute\\\": " \
540 f"\\\"{cmd}\\\" }}}}\"; sleep 1) | " \
541 f"sudo -S socat - UNIX-CONNECT:{self._temp.get(u'qga')}"
542 message = f"QGA execute '{cmd}' failed on {self._node[u'host']}"
543 stdout, _ = exec_cmd_no_error(
544 self._node, command, sudo=False, message=message
547 return json.loads(stdout.split(u"\n", 1)[0]) if stdout else dict()
549 def _wait_until_vm_boot(self):
550 """Wait until QEMU VM is booted."""
552 getattr(self, f'_wait_{self._opt["vnf"]}')()
553 except AttributeError:
556 def _wait_default(self, retries=60):
557 """Wait until QEMU with VPP is booted.
559 :param retries: Number of retries.
562 for _ in range(retries):
563 command = f"tail -1 {self._temp.get(u'log')}"
566 stdout, _ = exec_cmd_no_error(self._node, command, sudo=True)
570 if "vpp " in stdout and "built by" in stdout:
572 if u"Press enter to exit" in stdout:
574 if u"reboot: Power down" in stdout:
576 f"QEMU: NF failed to run on {self._node[u'host']}!"
580 f"QEMU: Timeout, VM not booted on {self._node[u'host']}!"
583 def _wait_nestedvm(self, retries=12):
584 """Wait until QEMU with NestedVM is booted.
586 First try to flush qga until there is output.
587 Then ping QEMU guest agent each 5s until VM booted or timeout.
589 :param retries: Number of retries with 5s between trials.
592 for _ in range(retries):
595 out = self._qemu_qga_flush()
597 logger.trace(f"QGA qga flush unexpected output {out}")
598 # Empty output - VM not booted yet
605 f"QEMU: Timeout, VM not booted on {self._node[u'host']}!"
607 for _ in range(retries):
610 out = self._qemu_qga_exec(u"guest-ping")
612 logger.trace(f"QGA guest-ping unexpected output {out}")
613 # Empty output - VM not booted yet.
616 # Non-error return - VM booted.
617 elif out.get(u"return") is not None:
619 # Skip error and wait.
620 elif out.get(u"error") is not None:
623 # If there is an unexpected output from QGA guest-info, try
624 # again until timeout.
625 logger.trace(f"QGA guest-ping unexpected output {out}")
628 f"QEMU: Timeout, VM not booted on {self._node[u'host']}!"
631 def _update_vm_interfaces(self):
632 """Update interface names in VM node dict."""
633 # Send guest-network-get-interfaces command via QGA, output example:
634 # {"return": [{"name": "eth0", "hardware-address": "52:54:00:00:04:01"},
635 # {"name": "eth1", "hardware-address": "52:54:00:00:04:02"}]}.
636 out = self._qemu_qga_exec(u"guest-network-get-interfaces")
637 interfaces = out.get(u"return")
641 f"Get VM interface list failed on {self._node[u'host']}"
643 # Create MAC-name dict.
644 for interface in interfaces:
645 if u"hardware-address" not in interface:
647 mac_name[interface[u"hardware-address"]] = interface[u"name"]
648 # Match interface by MAC and save interface name.
649 for interface in self._vm_info[u"interfaces"].values():
650 mac = interface.get(u"mac_address")
651 if_name = mac_name.get(mac)
653 logger.trace(f"Interface name for MAC {mac} not found")
655 interface[u"name"] = if_name
657 def qemu_start(self):
658 """Start QEMU and wait until VM boot.
660 :returns: VM node info.
663 cmd_opts = OptionString()
664 cmd_opts.add(f"{Constants.QEMU_BIN_PATH}/qemu-system-{self._arch}")
665 cmd_opts.extend(self._params)
666 message = f"QEMU: Start failed on {self._node[u'host']}!"
668 DUTSetup.check_huge_page(
669 self._node, u"/dev/hugepages", int(self._opt.get(u"mem")))
672 self._node, cmd_opts, timeout=300, sudo=True, message=message
674 self._wait_until_vm_boot()
681 """Kill qemu process."""
683 self._node, f"chmod +r {self._temp.get(u'pidfile')}", sudo=True
686 self._node, f"kill -SIGKILL $(cat {self._temp.get(u'pidfile')})",
690 for value in self._temp.values():
691 exec_cmd(self._node, f"cat {value}", sudo=True)
692 exec_cmd(self._node, f"rm -f {value}", sudo=True)
694 def qemu_kill_all(self):
695 """Kill all qemu processes on DUT node if specified."""
696 exec_cmd(self._node, u"pkill -SIGKILL qemu", sudo=True)
698 for value in self._temp.values():
699 exec_cmd(self._node, f"cat {value}", sudo=True)
700 exec_cmd(self._node, f"rm -f {value}", sudo=True)
702 def qemu_version(self):
703 """Return Qemu version.
705 :returns: Qemu version.
708 command = f"{Constants.QEMU_BIN_PATH}/qemu-system-{self._arch} " \
711 stdout, _ = exec_cmd_no_error(self._node, command, sudo=True)
712 return match(r"QEMU emulator version ([\d.]*)", stdout).group(1)