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1 | # Functional test that boots a Linux kernel and checks the console |
2 | # | |
3 | # Copyright IBM Corp. 2023 | |
4 | # | |
5 | # Author: | |
6 | # Pierre Morel <pmorel@linux.ibm.com> | |
7 | # | |
8 | # This work is licensed under the terms of the GNU GPL, version 2 or | |
9 | # later. See the COPYING file in the top-level directory. | |
10 | ||
11 | import os | |
12 | import shutil | |
13 | import time | |
14 | ||
15 | from avocado_qemu import QemuSystemTest | |
16 | from avocado_qemu import exec_command | |
17 | from avocado_qemu import exec_command_and_wait_for_pattern | |
18 | from avocado_qemu import interrupt_interactive_console_until_pattern | |
19 | from avocado_qemu import wait_for_console_pattern | |
20 | from avocado.utils import process | |
21 | from avocado.utils import archive | |
22 | ||
23 | ||
24 | class S390CPUTopology(QemuSystemTest): | |
25 | """ | |
26 | S390x CPU topology consists of 4 topology layers, from bottom to top, | |
27 | the cores, sockets, books and drawers and 2 modifiers attributes, | |
28 | the entitlement and the dedication. | |
29 | See: docs/system/s390x/cpu-topology.rst. | |
30 | ||
31 | S390x CPU topology is setup in different ways: | |
32 | - implicitly from the '-smp' argument by completing each topology | |
33 | level one after the other beginning with drawer 0, book 0 and | |
34 | socket 0. | |
35 | - explicitly from the '-device' argument on the QEMU command line | |
36 | - explicitly by hotplug of a new CPU using QMP or HMP | |
37 | - it is modified by using QMP 'set-cpu-topology' | |
38 | ||
39 | The S390x modifier attribute entitlement depends on the machine | |
40 | polarization, which can be horizontal or vertical. | |
41 | The polarization is changed on a request from the guest. | |
42 | """ | |
43 | timeout = 90 | |
cb042c73 | 44 | event_timeout = 10 |
e5bc49d5 PM |
45 | |
46 | KERNEL_COMMON_COMMAND_LINE = ('printk.time=0 ' | |
47 | 'root=/dev/ram ' | |
48 | 'selinux=0 ' | |
49 | 'rdinit=/bin/sh') | |
50 | ||
51 | def wait_until_booted(self): | |
52 | wait_for_console_pattern(self, 'no job control', | |
53 | failure_message='Kernel panic - not syncing', | |
54 | vm=None) | |
55 | ||
56 | def check_topology(self, c, s, b, d, e, t): | |
57 | res = self.vm.qmp('query-cpus-fast') | |
58 | cpus = res['return'] | |
59 | for cpu in cpus: | |
60 | core = cpu['props']['core-id'] | |
61 | socket = cpu['props']['socket-id'] | |
62 | book = cpu['props']['book-id'] | |
63 | drawer = cpu['props']['drawer-id'] | |
64 | entitlement = cpu.get('entitlement') | |
65 | dedicated = cpu.get('dedicated') | |
66 | if core == c: | |
67 | self.assertEqual(drawer, d) | |
68 | self.assertEqual(book, b) | |
69 | self.assertEqual(socket, s) | |
70 | self.assertEqual(entitlement, e) | |
71 | self.assertEqual(dedicated, t) | |
72 | ||
73 | def kernel_init(self): | |
74 | """ | |
75 | We need a VM that supports CPU topology, | |
76 | currently this only the case when using KVM, not TCG. | |
77 | We need a kernel supporting the CPU topology. | |
78 | We need a minimal root filesystem with a shell. | |
79 | """ | |
80 | self.require_accelerator("kvm") | |
81 | kernel_url = ('https://archives.fedoraproject.org/pub/archive' | |
82 | '/fedora-secondary/releases/35/Server/s390x/os' | |
83 | '/images/kernel.img') | |
84 | kernel_hash = '0d1aaaf303f07cf0160c8c48e56fe638' | |
85 | kernel_path = self.fetch_asset(kernel_url, algorithm='md5', | |
86 | asset_hash=kernel_hash) | |
87 | ||
88 | initrd_url = ('https://archives.fedoraproject.org/pub/archive' | |
89 | '/fedora-secondary/releases/35/Server/s390x/os' | |
90 | '/images/initrd.img') | |
91 | initrd_hash = 'a122057d95725ac030e2ec51df46e172' | |
92 | initrd_path_xz = self.fetch_asset(initrd_url, algorithm='md5', | |
93 | asset_hash=initrd_hash) | |
94 | initrd_path = os.path.join(self.workdir, 'initrd-raw.img') | |
95 | archive.lzma_uncompress(initrd_path_xz, initrd_path) | |
96 | ||
97 | self.vm.set_console() | |
98 | kernel_command_line = self.KERNEL_COMMON_COMMAND_LINE | |
99 | self.vm.add_args('-nographic', | |
100 | '-enable-kvm', | |
101 | '-cpu', 'max,ctop=on', | |
102 | '-m', '512', | |
103 | '-kernel', kernel_path, | |
104 | '-initrd', initrd_path, | |
105 | '-append', kernel_command_line) | |
106 | ||
cb042c73 PM |
107 | def system_init(self): |
108 | self.log.info("System init") | |
109 | exec_command_and_wait_for_pattern(self, | |
110 | """ mount proc -t proc /proc; | |
111 | mount sys -t sysfs /sys; | |
112 | cat /sys/devices/system/cpu/dispatching """, | |
113 | '0') | |
114 | ||
e5bc49d5 PM |
115 | def test_single(self): |
116 | """ | |
117 | This test checks the simplest topology with a single CPU. | |
118 | ||
119 | :avocado: tags=arch:s390x | |
120 | :avocado: tags=machine:s390-ccw-virtio | |
121 | """ | |
122 | self.kernel_init() | |
123 | self.vm.launch() | |
124 | self.wait_until_booted() | |
125 | self.check_topology(0, 0, 0, 0, 'medium', False) | |
126 | ||
127 | def test_default(self): | |
128 | """ | |
129 | This test checks the implicit topology. | |
130 | ||
131 | :avocado: tags=arch:s390x | |
132 | :avocado: tags=machine:s390-ccw-virtio | |
133 | """ | |
134 | self.kernel_init() | |
135 | self.vm.add_args('-smp', | |
136 | '13,drawers=2,books=2,sockets=3,cores=2,maxcpus=24') | |
137 | self.vm.launch() | |
138 | self.wait_until_booted() | |
139 | self.check_topology(0, 0, 0, 0, 'medium', False) | |
140 | self.check_topology(1, 0, 0, 0, 'medium', False) | |
141 | self.check_topology(2, 1, 0, 0, 'medium', False) | |
142 | self.check_topology(3, 1, 0, 0, 'medium', False) | |
143 | self.check_topology(4, 2, 0, 0, 'medium', False) | |
144 | self.check_topology(5, 2, 0, 0, 'medium', False) | |
145 | self.check_topology(6, 0, 1, 0, 'medium', False) | |
146 | self.check_topology(7, 0, 1, 0, 'medium', False) | |
147 | self.check_topology(8, 1, 1, 0, 'medium', False) | |
148 | self.check_topology(9, 1, 1, 0, 'medium', False) | |
149 | self.check_topology(10, 2, 1, 0, 'medium', False) | |
150 | self.check_topology(11, 2, 1, 0, 'medium', False) | |
151 | self.check_topology(12, 0, 0, 1, 'medium', False) | |
152 | ||
153 | def test_move(self): | |
154 | """ | |
155 | This test checks the topology modification by moving a CPU | |
156 | to another socket: CPU 0 is moved from socket 0 to socket 2. | |
157 | ||
158 | :avocado: tags=arch:s390x | |
159 | :avocado: tags=machine:s390-ccw-virtio | |
160 | """ | |
161 | self.kernel_init() | |
162 | self.vm.add_args('-smp', | |
163 | '1,drawers=2,books=2,sockets=3,cores=2,maxcpus=24') | |
164 | self.vm.launch() | |
165 | self.wait_until_booted() | |
166 | ||
167 | self.check_topology(0, 0, 0, 0, 'medium', False) | |
168 | res = self.vm.qmp('set-cpu-topology', | |
169 | {'core-id': 0, 'socket-id': 2, 'entitlement': 'low'}) | |
170 | self.assertEqual(res['return'], {}) | |
171 | self.check_topology(0, 2, 0, 0, 'low', False) | |
172 | ||
173 | def test_dash_device(self): | |
174 | """ | |
175 | This test verifies that a CPU defined with the '-device' | |
176 | command line option finds its right place inside the topology. | |
177 | ||
178 | :avocado: tags=arch:s390x | |
179 | :avocado: tags=machine:s390-ccw-virtio | |
180 | """ | |
181 | self.kernel_init() | |
182 | self.vm.add_args('-smp', | |
183 | '1,drawers=2,books=2,sockets=3,cores=2,maxcpus=24') | |
184 | self.vm.add_args('-device', 'max-s390x-cpu,core-id=10') | |
185 | self.vm.add_args('-device', | |
186 | 'max-s390x-cpu,' | |
187 | 'core-id=1,socket-id=0,book-id=1,drawer-id=1,entitlement=low') | |
188 | self.vm.add_args('-device', | |
189 | 'max-s390x-cpu,' | |
190 | 'core-id=2,socket-id=0,book-id=1,drawer-id=1,entitlement=medium') | |
191 | self.vm.add_args('-device', | |
192 | 'max-s390x-cpu,' | |
193 | 'core-id=3,socket-id=1,book-id=1,drawer-id=1,entitlement=high') | |
194 | self.vm.add_args('-device', | |
195 | 'max-s390x-cpu,' | |
196 | 'core-id=4,socket-id=1,book-id=1,drawer-id=1') | |
197 | self.vm.add_args('-device', | |
198 | 'max-s390x-cpu,' | |
199 | 'core-id=5,socket-id=2,book-id=1,drawer-id=1,dedicated=true') | |
200 | ||
201 | self.vm.launch() | |
202 | self.wait_until_booted() | |
203 | ||
204 | self.check_topology(10, 2, 1, 0, 'medium', False) | |
205 | self.check_topology(1, 0, 1, 1, 'low', False) | |
206 | self.check_topology(2, 0, 1, 1, 'medium', False) | |
207 | self.check_topology(3, 1, 1, 1, 'high', False) | |
208 | self.check_topology(4, 1, 1, 1, 'medium', False) | |
209 | self.check_topology(5, 2, 1, 1, 'high', True) | |
cb042c73 PM |
210 | |
211 | ||
212 | def guest_set_dispatching(self, dispatching): | |
213 | exec_command(self, | |
214 | f'echo {dispatching} > /sys/devices/system/cpu/dispatching') | |
215 | self.vm.event_wait('CPU_POLARIZATION_CHANGE', self.event_timeout) | |
216 | exec_command_and_wait_for_pattern(self, | |
217 | 'cat /sys/devices/system/cpu/dispatching', dispatching) | |
218 | ||
219 | ||
220 | def test_polarization(self): | |
221 | """ | |
222 | This test verifies that QEMU modifies the entitlement change after | |
223 | several guest polarization change requests. | |
224 | ||
225 | :avocado: tags=arch:s390x | |
226 | :avocado: tags=machine:s390-ccw-virtio | |
227 | """ | |
228 | self.kernel_init() | |
229 | self.vm.launch() | |
230 | self.wait_until_booted() | |
231 | ||
232 | self.system_init() | |
233 | res = self.vm.qmp('query-s390x-cpu-polarization') | |
234 | self.assertEqual(res['return']['polarization'], 'horizontal') | |
235 | self.check_topology(0, 0, 0, 0, 'medium', False) | |
236 | ||
237 | self.guest_set_dispatching('1'); | |
238 | res = self.vm.qmp('query-s390x-cpu-polarization') | |
239 | self.assertEqual(res['return']['polarization'], 'vertical') | |
240 | self.check_topology(0, 0, 0, 0, 'medium', False) | |
241 | ||
242 | self.guest_set_dispatching('0'); | |
243 | res = self.vm.qmp('query-s390x-cpu-polarization') | |
244 | self.assertEqual(res['return']['polarization'], 'horizontal') | |
245 | self.check_topology(0, 0, 0, 0, 'medium', False) | |
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246 | |
247 | ||
248 | def check_polarization(self, polarization): | |
249 | #We need to wait for the change to have been propagated to the kernel | |
250 | exec_command_and_wait_for_pattern(self, | |
251 | "\n".join([ | |
252 | "timeout 1 sh -c 'while true", | |
253 | 'do', | |
254 | ' syspath="/sys/devices/system/cpu/cpu0/polarization"', | |
255 | ' polarization="$(cat "$syspath")" || exit', | |
256 | f' if [ "$polarization" = "{polarization}" ]; then', | |
257 | ' exit 0', | |
258 | ' fi', | |
259 | ' sleep 0.01', | |
260 | #searched for strings mustn't show up in command, '' to obfuscate | |
261 | "done' && echo succ''ess || echo fail''ure", | |
262 | ]), | |
263 | "success", "failure") | |
264 | ||
265 | ||
266 | def test_entitlement(self): | |
267 | """ | |
268 | This test verifies that QEMU modifies the entitlement | |
269 | after a guest request and that the guest sees the change. | |
270 | ||
271 | :avocado: tags=arch:s390x | |
272 | :avocado: tags=machine:s390-ccw-virtio | |
273 | """ | |
274 | self.kernel_init() | |
275 | self.vm.launch() | |
276 | self.wait_until_booted() | |
277 | ||
278 | self.system_init() | |
279 | ||
280 | self.check_polarization('horizontal') | |
281 | self.check_topology(0, 0, 0, 0, 'medium', False) | |
282 | ||
283 | self.guest_set_dispatching('1') | |
284 | self.check_polarization('vertical:medium') | |
285 | self.check_topology(0, 0, 0, 0, 'medium', False) | |
286 | ||
287 | res = self.vm.qmp('set-cpu-topology', | |
288 | {'core-id': 0, 'entitlement': 'low'}) | |
289 | self.assertEqual(res['return'], {}) | |
290 | self.check_polarization('vertical:low') | |
291 | self.check_topology(0, 0, 0, 0, 'low', False) | |
292 | ||
293 | res = self.vm.qmp('set-cpu-topology', | |
294 | {'core-id': 0, 'entitlement': 'medium'}) | |
295 | self.assertEqual(res['return'], {}) | |
296 | self.check_polarization('vertical:medium') | |
297 | self.check_topology(0, 0, 0, 0, 'medium', False) | |
298 | ||
299 | res = self.vm.qmp('set-cpu-topology', | |
300 | {'core-id': 0, 'entitlement': 'high'}) | |
301 | self.assertEqual(res['return'], {}) | |
302 | self.check_polarization('vertical:high') | |
303 | self.check_topology(0, 0, 0, 0, 'high', False) | |
304 | ||
305 | self.guest_set_dispatching('0'); | |
306 | self.check_polarization("horizontal") | |
307 | self.check_topology(0, 0, 0, 0, 'high', False) | |
471676bf PM |
308 | |
309 | ||
310 | def test_dedicated(self): | |
311 | """ | |
312 | This test verifies that QEMU adjusts the entitlement correctly when a | |
313 | CPU is made dedicated. | |
314 | QEMU retains the entitlement value when horizontal polarization is in effect. | |
315 | For the guest, the field shows the effective value of the entitlement. | |
316 | ||
317 | :avocado: tags=arch:s390x | |
318 | :avocado: tags=machine:s390-ccw-virtio | |
319 | """ | |
320 | self.kernel_init() | |
321 | self.vm.launch() | |
322 | self.wait_until_booted() | |
323 | ||
324 | self.system_init() | |
325 | ||
326 | self.check_polarization("horizontal") | |
327 | ||
328 | res = self.vm.qmp('set-cpu-topology', | |
329 | {'core-id': 0, 'dedicated': True}) | |
330 | self.assertEqual(res['return'], {}) | |
331 | self.check_topology(0, 0, 0, 0, 'high', True) | |
332 | self.check_polarization("horizontal") | |
333 | ||
334 | self.guest_set_dispatching('1'); | |
335 | self.check_topology(0, 0, 0, 0, 'high', True) | |
336 | self.check_polarization("vertical:high") | |
337 | ||
338 | self.guest_set_dispatching('0'); | |
339 | self.check_topology(0, 0, 0, 0, 'high', True) | |
340 | self.check_polarization("horizontal") | |
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341 | |
342 | ||
343 | def test_socket_full(self): | |
344 | """ | |
345 | This test verifies that QEMU does not accept to overload a socket. | |
346 | The socket-id 0 on book-id 0 already contains CPUs 0 and 1 and can | |
347 | not accept any new CPU while socket-id 0 on book-id 1 is free. | |
348 | ||
349 | :avocado: tags=arch:s390x | |
350 | :avocado: tags=machine:s390-ccw-virtio | |
351 | """ | |
352 | self.kernel_init() | |
353 | self.vm.add_args('-smp', | |
354 | '3,drawers=2,books=2,sockets=3,cores=2,maxcpus=24') | |
355 | self.vm.launch() | |
356 | self.wait_until_booted() | |
357 | ||
358 | self.system_init() | |
359 | ||
360 | res = self.vm.qmp('set-cpu-topology', | |
361 | {'core-id': 2, 'socket-id': 0, 'book-id': 0}) | |
362 | self.assertEqual(res['error']['class'], 'GenericError') | |
363 | ||
364 | res = self.vm.qmp('set-cpu-topology', | |
365 | {'core-id': 2, 'socket-id': 0, 'book-id': 1}) | |
366 | self.assertEqual(res['return'], {}) | |
22ac7809 PM |
367 | |
368 | def test_dedicated_error(self): | |
369 | """ | |
370 | This test verifies that QEMU refuses to lower the entitlement | |
371 | of a dedicated CPU | |
372 | ||
373 | :avocado: tags=arch:s390x | |
374 | :avocado: tags=machine:s390-ccw-virtio | |
375 | """ | |
376 | self.kernel_init() | |
377 | self.vm.launch() | |
378 | self.wait_until_booted() | |
379 | ||
380 | self.system_init() | |
381 | ||
382 | res = self.vm.qmp('set-cpu-topology', | |
383 | {'core-id': 0, 'dedicated': True}) | |
384 | self.assertEqual(res['return'], {}) | |
385 | ||
386 | self.check_topology(0, 0, 0, 0, 'high', True) | |
387 | ||
388 | self.guest_set_dispatching('1'); | |
389 | ||
390 | self.check_topology(0, 0, 0, 0, 'high', True) | |
391 | ||
392 | res = self.vm.qmp('set-cpu-topology', | |
393 | {'core-id': 0, 'entitlement': 'low', 'dedicated': True}) | |
394 | self.assertEqual(res['error']['class'], 'GenericError') | |
395 | ||
396 | res = self.vm.qmp('set-cpu-topology', | |
397 | {'core-id': 0, 'entitlement': 'low'}) | |
398 | self.assertEqual(res['error']['class'], 'GenericError') | |
399 | ||
400 | res = self.vm.qmp('set-cpu-topology', | |
401 | {'core-id': 0, 'entitlement': 'medium', 'dedicated': True}) | |
402 | self.assertEqual(res['error']['class'], 'GenericError') | |
403 | ||
404 | res = self.vm.qmp('set-cpu-topology', | |
405 | {'core-id': 0, 'entitlement': 'medium'}) | |
406 | self.assertEqual(res['error']['class'], 'GenericError') | |
407 | ||
408 | res = self.vm.qmp('set-cpu-topology', | |
409 | {'core-id': 0, 'entitlement': 'low', 'dedicated': False}) | |
410 | self.assertEqual(res['return'], {}) | |
411 | ||
412 | res = self.vm.qmp('set-cpu-topology', | |
413 | {'core-id': 0, 'entitlement': 'medium', 'dedicated': False}) | |
414 | self.assertEqual(res['return'], {}) | |
219922ef PM |
415 | |
416 | def test_move_error(self): | |
417 | """ | |
418 | This test verifies that QEMU refuses to move a CPU to an | |
419 | nonexistent location | |
420 | ||
421 | :avocado: tags=arch:s390x | |
422 | :avocado: tags=machine:s390-ccw-virtio | |
423 | """ | |
424 | self.kernel_init() | |
425 | self.vm.launch() | |
426 | self.wait_until_booted() | |
427 | ||
428 | self.system_init() | |
429 | ||
430 | res = self.vm.qmp('set-cpu-topology', {'core-id': 0, 'drawer-id': 1}) | |
431 | self.assertEqual(res['error']['class'], 'GenericError') | |
432 | ||
433 | res = self.vm.qmp('set-cpu-topology', {'core-id': 0, 'book-id': 1}) | |
434 | self.assertEqual(res['error']['class'], 'GenericError') | |
435 | ||
436 | res = self.vm.qmp('set-cpu-topology', {'core-id': 0, 'socket-id': 1}) | |
437 | self.assertEqual(res['error']['class'], 'GenericError') | |
438 | ||
439 | self.check_topology(0, 0, 0, 0, 'medium', False) |