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11#include "qemu/osdep.h"
12#include <glib/gstdio.h>
13#include "contrib/ivshmem-server/ivshmem-server.h"
14#include "libqos/libqos-pc.h"
15#include "libqos/libqos-spapr.h"
16#include "libqtest.h"
17
18#define TMPSHMSIZE (1 << 20)
19static char *tmpshm;
20static void *tmpshmem;
21static char *tmpdir;
22static char *tmpserver;
23
24static void save_fn(QPCIDevice *dev, int devfn, void *data)
25{
26 QPCIDevice **pdev = (QPCIDevice **) data;
27
28 *pdev = dev;
29}
30
31static QPCIDevice *get_device(QPCIBus *pcibus)
32{
33 QPCIDevice *dev;
34
35 dev = NULL;
36 qpci_device_foreach(pcibus, 0x1af4, 0x1110, save_fn, &dev);
37 g_assert(dev != NULL);
38
39 return dev;
40}
41
42typedef struct _IVState {
43 QOSState *qs;
44 QPCIBar reg_bar, mem_bar;
45 QPCIDevice *dev;
46} IVState;
47
48enum Reg {
49 INTRMASK = 0,
50 INTRSTATUS = 4,
51 IVPOSITION = 8,
52 DOORBELL = 12,
53};
54
55static const char* reg2str(enum Reg reg) {
56 switch (reg) {
57 case INTRMASK:
58 return "IntrMask";
59 case INTRSTATUS:
60 return "IntrStatus";
61 case IVPOSITION:
62 return "IVPosition";
63 case DOORBELL:
64 return "DoorBell";
65 default:
66 return NULL;
67 }
68}
69
70static inline unsigned in_reg(IVState *s, enum Reg reg)
71{
72 const char *name = reg2str(reg);
73 unsigned res;
74
75 res = qpci_io_readl(s->dev, s->reg_bar, reg);
76 g_test_message("*%s -> %x", name, res);
77
78 return res;
79}
80
81static inline void out_reg(IVState *s, enum Reg reg, unsigned v)
82{
83 const char *name = reg2str(reg);
84
85 g_test_message("%x -> *%s", v, name);
86 qpci_io_writel(s->dev, s->reg_bar, reg, v);
87}
88
89static inline void read_mem(IVState *s, uint64_t off, void *buf, size_t len)
90{
91 qpci_memread(s->dev, s->mem_bar, off, buf, len);
92}
93
94static inline void write_mem(IVState *s, uint64_t off,
95 const void *buf, size_t len)
96{
97 qpci_memwrite(s->dev, s->mem_bar, off, buf, len);
98}
99
100static void cleanup_vm(IVState *s)
101{
102 g_free(s->dev);
103 qtest_shutdown(s->qs);
104}
105
106static void setup_vm_cmd(IVState *s, const char *cmd, bool msix)
107{
108 uint64_t barsize;
109 const char *arch = qtest_get_arch();
110
111 if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
112 s->qs = qtest_pc_boot("%s", cmd);
113 } else if (strcmp(arch, "ppc64") == 0) {
114 s->qs = qtest_spapr_boot("%s", cmd);
115 } else {
116 g_printerr("ivshmem-test tests are only available on x86 or ppc64\n");
117 exit(EXIT_FAILURE);
118 }
119 s->dev = get_device(s->qs->pcibus);
120
121 s->reg_bar = qpci_iomap(s->dev, 0, &barsize);
122 g_assert_cmpuint(barsize, ==, 256);
123
124 if (msix) {
125 qpci_msix_enable(s->dev);
126 }
127
128 s->mem_bar = qpci_iomap(s->dev, 2, &barsize);
129 g_assert_cmpuint(barsize, ==, TMPSHMSIZE);
130
131 qpci_device_enable(s->dev);
132}
133
134static void setup_vm(IVState *s)
135{
136 char *cmd = g_strdup_printf("-object memory-backend-file"
137 ",id=mb1,size=1M,share=on,mem-path=/dev/shm%s"
138 " -device ivshmem-plain,memdev=mb1", tmpshm);
139
140 setup_vm_cmd(s, cmd, false);
141
142 g_free(cmd);
143}
144
145static void test_ivshmem_single(void)
146{
147 IVState state, *s;
148 uint32_t data[1024];
149 int i;
150
151 setup_vm(&state);
152 s = &state;
153
154
155 g_assert_cmpuint(in_reg(s, INTRMASK), ==, 0);
156 g_assert_cmpuint(in_reg(s, INTRSTATUS), ==, 0);
157 g_assert_cmpuint(in_reg(s, IVPOSITION), ==, 0);
158
159
160 out_reg(s, INTRMASK, 0xffffffff);
161 g_assert_cmpuint(in_reg(s, INTRMASK), ==, 0xffffffff);
162 out_reg(s, INTRSTATUS, 1);
163
164 g_assert_cmpuint(in_reg(s, INTRSTATUS), ==, 1);
165
166 g_assert_cmpuint(in_reg(s, INTRSTATUS), ==, 0);
167
168
169
170 out_reg(s, IVPOSITION, 1);
171 in_reg(s, DOORBELL);
172
173
174 out_reg(s, DOORBELL, 8 << 16);
175
176
177 for (i = 0; i < G_N_ELEMENTS(data); i++) {
178 data[i] = i;
179 }
180 write_mem(s, 0, data, sizeof(data));
181
182
183 for (i = 0; i < G_N_ELEMENTS(data); i++) {
184 g_assert_cmpuint(((uint32_t *)tmpshmem)[i], ==, i);
185 }
186
187
188 memset(data, 0, sizeof(data));
189 read_mem(s, 0, data, sizeof(data));
190 for (i = 0; i < G_N_ELEMENTS(data); i++) {
191 g_assert_cmpuint(data[i], ==, i);
192 }
193
194 cleanup_vm(s);
195}
196
197static void test_ivshmem_pair(void)
198{
199 IVState state1, state2, *s1, *s2;
200 char *data;
201 int i;
202
203 setup_vm(&state1);
204 s1 = &state1;
205 setup_vm(&state2);
206 s2 = &state2;
207
208 data = g_malloc0(TMPSHMSIZE);
209
210
211 memset(tmpshmem, 0x42, TMPSHMSIZE);
212 read_mem(s1, 0, data, TMPSHMSIZE);
213 for (i = 0; i < TMPSHMSIZE; i++) {
214 g_assert_cmpuint(data[i], ==, 0x42);
215 }
216 read_mem(s2, 0, data, TMPSHMSIZE);
217 for (i = 0; i < TMPSHMSIZE; i++) {
218 g_assert_cmpuint(data[i], ==, 0x42);
219 }
220
221
222 memset(data, 0x43, TMPSHMSIZE);
223 write_mem(s1, 0, data, TMPSHMSIZE);
224 memset(data, 0, TMPSHMSIZE);
225 read_mem(s2, 0, data, TMPSHMSIZE);
226 for (i = 0; i < TMPSHMSIZE; i++) {
227 g_assert_cmpuint(data[i], ==, 0x43);
228 }
229
230
231 memset(data, 0x44, TMPSHMSIZE);
232 write_mem(s2, 0, data, TMPSHMSIZE);
233 memset(data, 0, TMPSHMSIZE);
234 read_mem(s1, 0, data, TMPSHMSIZE);
235 for (i = 0; i < TMPSHMSIZE; i++) {
236 g_assert_cmpuint(data[i], ==, 0x44);
237 }
238
239 cleanup_vm(s1);
240 cleanup_vm(s2);
241 g_free(data);
242}
243
244typedef struct ServerThread {
245 GThread *thread;
246 IvshmemServer *server;
247 int pipe[2];
248} ServerThread;
249
250static void *server_thread(void *data)
251{
252 ServerThread *t = data;
253 IvshmemServer *server = t->server;
254
255 while (true) {
256 fd_set fds;
257 int maxfd, ret;
258
259 FD_ZERO(&fds);
260 FD_SET(t->pipe[0], &fds);
261 maxfd = t->pipe[0] + 1;
262
263 ivshmem_server_get_fds(server, &fds, &maxfd);
264
265 ret = select(maxfd, &fds, NULL, NULL, NULL);
266
267 if (ret < 0) {
268 if (errno == EINTR) {
269 continue;
270 }
271
272 g_critical("select error: %s\n", strerror(errno));
273 break;
274 }
275 if (ret == 0) {
276 continue;
277 }
278
279 if (FD_ISSET(t->pipe[0], &fds)) {
280 break;
281 }
282
283 if (ivshmem_server_handle_fds(server, &fds, maxfd) < 0) {
284 g_critical("ivshmem_server_handle_fds() failed\n");
285 break;
286 }
287 }
288
289 return NULL;
290}
291
292static void setup_vm_with_server(IVState *s, int nvectors)
293{
294 char *cmd;
295
296 cmd = g_strdup_printf("-chardev socket,id=chr0,path=%s "
297 "-device ivshmem-doorbell,chardev=chr0,vectors=%d",
298 tmpserver, nvectors);
299
300 setup_vm_cmd(s, cmd, true);
301
302 g_free(cmd);
303}
304
305static void test_ivshmem_server(void)
306{
307 g_autoptr(GError) err = NULL;
308 IVState state1, state2, *s1, *s2;
309 ServerThread thread;
310 IvshmemServer server;
311 int ret, vm1, vm2;
312 int nvectors = 2;
313 guint64 end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
314
315 ret = ivshmem_server_init(&server, tmpserver, tmpshm, true,
316 TMPSHMSIZE, nvectors,
317 g_test_verbose());
318 g_assert_cmpint(ret, ==, 0);
319
320 ret = ivshmem_server_start(&server);
321 g_assert_cmpint(ret, ==, 0);
322
323 thread.server = &server;
324 g_unix_open_pipe(thread.pipe, FD_CLOEXEC, &err);
325 g_assert_no_error(err);
326 thread.thread = g_thread_new("ivshmem-server", server_thread, &thread);
327 g_assert(thread.thread != NULL);
328
329 setup_vm_with_server(&state1, nvectors);
330 s1 = &state1;
331 setup_vm_with_server(&state2, nvectors);
332 s2 = &state2;
333
334
335 vm1 = in_reg(s1, IVPOSITION);
336 vm2 = in_reg(s2, IVPOSITION);
337 g_assert_cmpint(vm1, >=, 0);
338 g_assert_cmpint(vm2, >=, 0);
339 g_assert_cmpint(vm1, !=, vm2);
340
341
342 ret = qpci_msix_table_size(s1->dev);
343 g_assert_cmpuint(ret, ==, nvectors);
344
345
346
347
348 ret = qpci_msix_pending(s1->dev, 0);
349 g_assert_cmpuint(ret, ==, 0);
350 out_reg(s2, DOORBELL, vm1 << 16);
351 do {
352 g_usleep(10000);
353 ret = qpci_msix_pending(s1->dev, 0);
354 } while (ret == 0 && g_get_monotonic_time() < end_time);
355 g_assert_cmpuint(ret, !=, 0);
356
357
358 ret = qpci_msix_pending(s2->dev, 1);
359 g_assert_cmpuint(ret, ==, 0);
360 out_reg(s1, DOORBELL, vm2 << 16 | 1);
361 do {
362 g_usleep(10000);
363 ret = qpci_msix_pending(s2->dev, 1);
364 } while (ret == 0 && g_get_monotonic_time() < end_time);
365 g_assert_cmpuint(ret, !=, 0);
366
367 cleanup_vm(s2);
368 cleanup_vm(s1);
369
370 if (qemu_write_full(thread.pipe[1], "q", 1) != 1) {
371 g_error("qemu_write_full: %s", g_strerror(errno));
372 }
373
374 g_thread_join(thread.thread);
375
376 ivshmem_server_close(&server);
377 close(thread.pipe[1]);
378 close(thread.pipe[0]);
379}
380
381static void test_ivshmem_hotplug_q35(void)
382{
383 QTestState *qts = qtest_init("-object memory-backend-ram,size=1M,id=mb1 "
384 "-device pcie-root-port,id=p1 "
385 "-device pcie-pci-bridge,bus=p1,id=b1 "
386 "-machine q35");
387
388 qtest_qmp_device_add(qts, "ivshmem-plain", "iv1",
389 "{'memdev': 'mb1', 'bus': 'b1'}");
390 qtest_qmp_device_del_send(qts, "iv1");
391
392 qtest_quit(qts);
393}
394
395#define PCI_SLOT_HP 0x06
396
397static void test_ivshmem_hotplug(void)
398{
399 QTestState *qts;
400 const char *arch = qtest_get_arch();
401
402 if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
403 qts = qtest_init("-object memory-backend-ram,size=1M,id=mb1"
404 " -machine pc");
405 } else {
406 qts = qtest_init("-object memory-backend-ram,size=1M,id=mb1");
407 }
408
409 qtest_qmp_device_add(qts, "ivshmem-plain", "iv1",
410 "{'addr': %s, 'memdev': 'mb1'}",
411 stringify(PCI_SLOT_HP));
412 if (strcmp(arch, "ppc64") != 0) {
413 qpci_unplug_acpi_device_test(qts, "iv1", PCI_SLOT_HP);
414 }
415
416 qtest_quit(qts);
417}
418
419static void test_ivshmem_memdev(void)
420{
421 IVState state;
422
423
424 setup_vm_cmd(&state, "-object memory-backend-ram,size=1M,id=mb1"
425 " -device ivshmem-plain,memdev=mb1", false);
426
427 cleanup_vm(&state);
428}
429
430static void cleanup(void)
431{
432 if (tmpshmem) {
433 munmap(tmpshmem, TMPSHMSIZE);
434 tmpshmem = NULL;
435 }
436
437 if (tmpshm) {
438 shm_unlink(tmpshm);
439 g_free(tmpshm);
440 tmpshm = NULL;
441 }
442
443 if (tmpserver) {
444 g_unlink(tmpserver);
445 g_free(tmpserver);
446 tmpserver = NULL;
447 }
448
449 if (tmpdir) {
450 g_rmdir(tmpdir);
451 tmpdir = NULL;
452 }
453}
454
455static void abrt_handler(void *data)
456{
457 cleanup();
458}
459
460static gchar *mktempshm(int size, int *fd)
461{
462 while (true) {
463 gchar *name;
464
465 name = g_strdup_printf("/qtest-%u-%u", getpid(), g_test_rand_int());
466 *fd = shm_open(name, O_CREAT|O_RDWR|O_EXCL,
467 S_IRWXU|S_IRWXG|S_IRWXO);
468 if (*fd > 0) {
469 g_assert(ftruncate(*fd, size) == 0);
470 return name;
471 }
472
473 g_free(name);
474
475 if (errno != EEXIST) {
476 perror("shm_open");
477 return NULL;
478 }
479 }
480}
481
482int main(int argc, char **argv)
483{
484 int ret, fd;
485 gchar dir[] = "/tmp/ivshmem-test.XXXXXX";
486 const char *arch = qtest_get_arch();
487
488 g_test_init(&argc, &argv, NULL);
489
490 qtest_add_abrt_handler(abrt_handler, NULL);
491
492 tmpshm = mktempshm(TMPSHMSIZE, &fd);
493 if (!tmpshm) {
494 goto out;
495 }
496 tmpshmem = mmap(0, TMPSHMSIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
497 g_assert(tmpshmem != MAP_FAILED);
498
499 if (g_mkdtemp(dir) == NULL) {
500 g_error("g_mkdtemp: %s", g_strerror(errno));
501 }
502 tmpdir = dir;
503 tmpserver = g_strconcat(tmpdir, "/server", NULL);
504
505 qtest_add_func("/ivshmem/single", test_ivshmem_single);
506 qtest_add_func("/ivshmem/hotplug", test_ivshmem_hotplug);
507 qtest_add_func("/ivshmem/memdev", test_ivshmem_memdev);
508 if (g_test_slow()) {
509 qtest_add_func("/ivshmem/pair", test_ivshmem_pair);
510 qtest_add_func("/ivshmem/server", test_ivshmem_server);
511 }
512 if (!strcmp(arch, "x86_64") && qtest_has_machine("q35")) {
513 qtest_add_func("/ivshmem/hotplug-q35", test_ivshmem_hotplug_q35);
514 }
515
516out:
517 ret = g_test_run();
518 cleanup();
519 return ret;
520}
521
