tests/ivshmem-test.c

   1 /*
   2  * QTest testcase for ivshmem
   3  *
   4  * Copyright (c) 2014 SUSE LINUX Products GmbH
   5  * Copyright (c) 2015 Red Hat, Inc.
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   8  * See the COPYING file in the top-level directory.
   9  */
  10
  11 #include "qemu/osdep.h"
  12 #include <glib/gstdio.h>
  13 #include "contrib/ivshmem-server/ivshmem-server.h"
  14 #include "libqos/pci-pc.h"
  15 #include "libqtest.h"
  16 #include "qemu-common.h"
  17
  18 #define TMPSHMSIZE (1 << 20)
  19 static char *tmpshm;
  20 static void *tmpshmem;
  21 static char *tmpdir;
  22 static char *tmpserver;
  23
  24 static void save_fn(QPCIDevice *dev, int devfn, void *data)
  25 {
  26     QPCIDevice **pdev = (QPCIDevice **) data;
  27
  28     *pdev = dev;
  29 }
  30
  31 static 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
  42 typedef struct _IVState {
  43     QTestState *qtest;
  44     void *reg_base, *mem_base;
  45     QPCIBus *pcibus;
  46     QPCIDevice *dev;
  47 } IVState;
  48
  49 enum Reg {
  50     INTRMASK = 0,
  51     INTRSTATUS = 4,
  52     IVPOSITION = 8,
  53     DOORBELL = 12,
  54 };
  55
  56 static const char* reg2str(enum Reg reg) {
  57     switch (reg) {
  58     case INTRMASK:
  59         return "IntrMask";
  60     case INTRSTATUS:
  61         return "IntrStatus";
  62     case IVPOSITION:
  63         return "IVPosition";
  64     case DOORBELL:
  65         return "DoorBell";
  66     default:
  67         return NULL;
  68     }
  69 }
  70
  71 static inline unsigned in_reg(IVState *s, enum Reg reg)
  72 {
  73     const char *name = reg2str(reg);
  74     QTestState *qtest = global_qtest;
  75     unsigned res;
  76
  77     global_qtest = s->qtest;
  78     res = qpci_io_readl(s->dev, s->reg_base + reg);
  79     g_test_message("*%s -> %x\n", name, res);
  80     global_qtest = qtest;
  81
  82     return res;
  83 }
  84
  85 static inline void out_reg(IVState *s, enum Reg reg, unsigned v)
  86 {
  87     const char *name = reg2str(reg);
  88     QTestState *qtest = global_qtest;
  89
  90     global_qtest = s->qtest;
  91     g_test_message("%x -> *%s\n", v, name);
  92     qpci_io_writel(s->dev, s->reg_base + reg, v);
  93     global_qtest = qtest;
  94 }
  95
  96 static void cleanup_vm(IVState *s)
  97 {
  98     g_free(s->dev);
  99     qpci_free_pc(s->pcibus);
 100     qtest_quit(s->qtest);
 101 }
 102
 103 static void setup_vm_cmd(IVState *s, const char *cmd, bool msix)
 104 {
 105     uint64_t barsize;
 106
 107     s->qtest = qtest_start(cmd);
 108     s->pcibus = qpci_init_pc();
 109     s->dev = get_device(s->pcibus);
 110
 111     s->reg_base = qpci_iomap(s->dev, 0, &barsize);
 112     g_assert_nonnull(s->reg_base);
 113     g_assert_cmpuint(barsize, ==, 256);
 114
 115     if (msix) {
 116         qpci_msix_enable(s->dev);
 117     }
 118
 119     s->mem_base = qpci_iomap(s->dev, 2, &barsize);
 120     g_assert_nonnull(s->mem_base);
 121     g_assert_cmpuint(barsize, ==, TMPSHMSIZE);
 122
 123     qpci_device_enable(s->dev);
 124 }
 125
 126 static void setup_vm(IVState *s)
 127 {
 128     char *cmd = g_strdup_printf("-object memory-backend-file"
 129                                 ",id=mb1,size=1M,share,mem-path=/dev/shm%s"
 130                                 " -device ivshmem-plain,memdev=mb1", tmpshm);
 131
 132     setup_vm_cmd(s, cmd, false);
 133
 134     g_free(cmd);
 135 }
 136
 137 static void test_ivshmem_single(void)
 138 {
 139     IVState state, *s;
 140     uint32_t data[1024];
 141     int i;
 142
 143     setup_vm(&state);
 144     s = &state;
 145
 146     /* initial state of readable registers */
 147     g_assert_cmpuint(in_reg(s, INTRMASK), ==, 0);
 148     g_assert_cmpuint(in_reg(s, INTRSTATUS), ==, 0);
 149     g_assert_cmpuint(in_reg(s, IVPOSITION), ==, 0);
 150
 151     /* trigger interrupt via registers */
 152     out_reg(s, INTRMASK, 0xffffffff);
 153     g_assert_cmpuint(in_reg(s, INTRMASK), ==, 0xffffffff);
 154     out_reg(s, INTRSTATUS, 1);
 155     /* check interrupt status */
 156     g_assert_cmpuint(in_reg(s, INTRSTATUS), ==, 1);
 157     /* reading clears */
 158     g_assert_cmpuint(in_reg(s, INTRSTATUS), ==, 0);
 159     /* TODO intercept actual interrupt (needs qtest work) */
 160
 161     /* invalid register access */
 162     out_reg(s, IVPOSITION, 1);
 163     in_reg(s, DOORBELL);
 164
 165     /* ring the (non-functional) doorbell */
 166     out_reg(s, DOORBELL, 8 << 16);
 167
 168     /* write shared memory */
 169     for (i = 0; i < G_N_ELEMENTS(data); i++) {
 170         data[i] = i;
 171     }
 172     qtest_memwrite(s->qtest, (uintptr_t)s->mem_base, data, sizeof(data));
 173
 174     /* verify write */
 175     for (i = 0; i < G_N_ELEMENTS(data); i++) {
 176         g_assert_cmpuint(((uint32_t *)tmpshmem)[i], ==, i);
 177     }
 178
 179     /* read it back and verify read */
 180     memset(data, 0, sizeof(data));
 181     qtest_memread(s->qtest, (uintptr_t)s->mem_base, data, sizeof(data));
 182     for (i = 0; i < G_N_ELEMENTS(data); i++) {
 183         g_assert_cmpuint(data[i], ==, i);
 184     }
 185
 186     cleanup_vm(s);
 187 }
 188
 189 static void test_ivshmem_pair(void)
 190 {
 191     IVState state1, state2, *s1, *s2;
 192     char *data;
 193     int i;
 194
 195     setup_vm(&state1);
 196     s1 = &state1;
 197     setup_vm(&state2);
 198     s2 = &state2;
 199
 200     data = g_malloc0(TMPSHMSIZE);
 201
 202     /* host write, guest 1 & 2 read */
 203     memset(tmpshmem, 0x42, TMPSHMSIZE);
 204     qtest_memread(s1->qtest, (uintptr_t)s1->mem_base, data, TMPSHMSIZE);
 205     for (i = 0; i < TMPSHMSIZE; i++) {
 206         g_assert_cmpuint(data[i], ==, 0x42);
 207     }
 208     qtest_memread(s2->qtest, (uintptr_t)s2->mem_base, data, TMPSHMSIZE);
 209     for (i = 0; i < TMPSHMSIZE; i++) {
 210         g_assert_cmpuint(data[i], ==, 0x42);
 211     }
 212
 213     /* guest 1 write, guest 2 read */
 214     memset(data, 0x43, TMPSHMSIZE);
 215     qtest_memwrite(s1->qtest, (uintptr_t)s1->mem_base, data, TMPSHMSIZE);
 216     memset(data, 0, TMPSHMSIZE);
 217     qtest_memread(s2->qtest, (uintptr_t)s2->mem_base, data, TMPSHMSIZE);
 218     for (i = 0; i < TMPSHMSIZE; i++) {
 219         g_assert_cmpuint(data[i], ==, 0x43);
 220     }
 221
 222     /* guest 2 write, guest 1 read */
 223     memset(data, 0x44, TMPSHMSIZE);
 224     qtest_memwrite(s2->qtest, (uintptr_t)s2->mem_base, data, TMPSHMSIZE);
 225     memset(data, 0, TMPSHMSIZE);
 226     qtest_memread(s1->qtest, (uintptr_t)s2->mem_base, data, TMPSHMSIZE);
 227     for (i = 0; i < TMPSHMSIZE; i++) {
 228         g_assert_cmpuint(data[i], ==, 0x44);
 229     }
 230
 231     cleanup_vm(s1);
 232     cleanup_vm(s2);
 233     g_free(data);
 234 }
 235
 236 typedef struct ServerThread {
 237     GThread *thread;
 238     IvshmemServer *server;
 239     int pipe[2]; /* to handle quit */
 240 } ServerThread;
 241
 242 static void *server_thread(void *data)
 243 {
 244     ServerThread *t = data;
 245     IvshmemServer *server = t->server;
 246
 247     while (true) {
 248         fd_set fds;
 249         int maxfd, ret;
 250
 251         FD_ZERO(&fds);
 252         FD_SET(t->pipe[0], &fds);
 253         maxfd = t->pipe[0] + 1;
 254
 255         ivshmem_server_get_fds(server, &fds, &maxfd);
 256
 257         ret = select(maxfd, &fds, NULL, NULL, NULL);
 258
 259         if (ret < 0) {
 260             if (errno == EINTR) {
 261                 continue;
 262             }
 263
 264             g_critical("select error: %s\n", strerror(errno));
 265             break;
 266         }
 267         if (ret == 0) {
 268             continue;
 269         }
 270
 271         if (FD_ISSET(t->pipe[0], &fds)) {
 272             break;
 273         }
 274
 275         if (ivshmem_server_handle_fds(server, &fds, maxfd) < 0) {
 276             g_critical("ivshmem_server_handle_fds() failed\n");
 277             break;
 278         }
 279     }
 280
 281     return NULL;
 282 }
 283
 284 static void setup_vm_with_server(IVState *s, int nvectors, bool msi)
 285 {
 286     char *cmd = g_strdup_printf("-chardev socket,id=chr0,path=%s,nowait "
 287                                 "-device ivshmem%s,chardev=chr0,vectors=%d",
 288                                 tmpserver,
 289                                 msi ? "-doorbell" : ",size=1M,msi=off",
 290                                 nvectors);
 291
 292     setup_vm_cmd(s, cmd, msi);
 293
 294     g_free(cmd);
 295 }
 296
 297 static void test_ivshmem_server(bool msi)
 298 {
 299     IVState state1, state2, *s1, *s2;
 300     ServerThread thread;
 301     IvshmemServer server;
 302     int ret, vm1, vm2;
 303     int nvectors = 2;
 304     guint64 end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 305
 306     ret = ivshmem_server_init(&server, tmpserver, tmpshm, true,
 307                               TMPSHMSIZE, nvectors,
 308                               g_test_verbose());
 309     g_assert_cmpint(ret, ==, 0);
 310
 311     ret = ivshmem_server_start(&server);
 312     g_assert_cmpint(ret, ==, 0);
 313
 314     thread.server = &server;
 315     ret = pipe(thread.pipe);
 316     g_assert_cmpint(ret, ==, 0);
 317     thread.thread = g_thread_new("ivshmem-server", server_thread, &thread);
 318     g_assert(thread.thread != NULL);
 319
 320     setup_vm_with_server(&state1, nvectors, msi);
 321     s1 = &state1;
 322     setup_vm_with_server(&state2, nvectors, msi);
 323     s2 = &state2;
 324
 325     /* check got different VM ids */
 326     vm1 = in_reg(s1, IVPOSITION);
 327     vm2 = in_reg(s2, IVPOSITION);
 328     g_assert_cmpint(vm1, >=, 0);
 329     g_assert_cmpint(vm2, >=, 0);
 330     g_assert_cmpint(vm1, !=, vm2);
 331
 332     /* check number of MSI-X vectors */
 333     global_qtest = s1->qtest;
 334     if (msi) {
 335         ret = qpci_msix_table_size(s1->dev);
 336         g_assert_cmpuint(ret, ==, nvectors);
 337     }
 338
 339     /* TODO test behavior before MSI-X is enabled */
 340
 341     /* ping vm2 -> vm1 on vector 0 */
 342     if (msi) {
 343         ret = qpci_msix_pending(s1->dev, 0);
 344         g_assert_cmpuint(ret, ==, 0);
 345     } else {
 346         g_assert_cmpuint(in_reg(s1, INTRSTATUS), ==, 0);
 347     }
 348     out_reg(s2, DOORBELL, vm1 << 16);
 349     do {
 350         g_usleep(10000);
 351         ret = msi ? qpci_msix_pending(s1->dev, 0) : in_reg(s1, INTRSTATUS);
 352     } while (ret == 0 && g_get_monotonic_time() < end_time);
 353     g_assert_cmpuint(ret, !=, 0);
 354
 355     /* ping vm1 -> vm2 on vector 1 */
 356     global_qtest = s2->qtest;
 357     if (msi) {
 358         ret = qpci_msix_pending(s2->dev, 1);
 359         g_assert_cmpuint(ret, ==, 0);
 360     } else {
 361         g_assert_cmpuint(in_reg(s2, INTRSTATUS), ==, 0);
 362     }
 363     out_reg(s1, DOORBELL, vm2 << 16 | 1);
 364     do {
 365         g_usleep(10000);
 366         ret = msi ? qpci_msix_pending(s2->dev, 1) : in_reg(s2, INTRSTATUS);
 367     } while (ret == 0 && g_get_monotonic_time() < end_time);
 368     g_assert_cmpuint(ret, !=, 0);
 369
 370     cleanup_vm(s2);
 371     cleanup_vm(s1);
 372
 373     if (qemu_write_full(thread.pipe[1], "q", 1) != 1) {
 374         g_error("qemu_write_full: %s", g_strerror(errno));
 375     }
 376
 377     g_thread_join(thread.thread);
 378
 379     ivshmem_server_close(&server);
 380     close(thread.pipe[1]);
 381     close(thread.pipe[0]);
 382 }
 383
 384 static void test_ivshmem_server_msi(void)
 385 {
 386     test_ivshmem_server(true);
 387 }
 388
 389 static void test_ivshmem_server_irq(void)
 390 {
 391     test_ivshmem_server(false);
 392 }
 393
 394 #define PCI_SLOT_HP             0x06
 395
 396 static void test_ivshmem_hotplug(void)
 397 {
 398     gchar *opts;
 399
 400     qtest_start("");
 401
 402     opts = g_strdup_printf("'shm': '%s', 'size': '1M'", tmpshm);
 403
 404     qpci_plug_device_test("ivshmem", "iv1", PCI_SLOT_HP, opts);
 405     qpci_unplug_acpi_device_test("iv1", PCI_SLOT_HP);
 406
 407     qtest_end();
 408     g_free(opts);
 409 }
 410
 411 static void test_ivshmem_memdev(void)
 412 {
 413     IVState state;
 414
 415     /* just for the sake of checking memory-backend property */
 416     setup_vm_cmd(&state, "-object memory-backend-ram,size=1M,id=mb1"
 417                  " -device ivshmem-plain,memdev=mb1", false);
 418
 419     cleanup_vm(&state);
 420 }
 421
 422 static void cleanup(void)
 423 {
 424     if (tmpshmem) {
 425         munmap(tmpshmem, TMPSHMSIZE);
 426         tmpshmem = NULL;
 427     }
 428
 429     if (tmpshm) {
 430         shm_unlink(tmpshm);
 431         g_free(tmpshm);
 432         tmpshm = NULL;
 433     }
 434
 435     if (tmpserver) {
 436         g_unlink(tmpserver);
 437         g_free(tmpserver);
 438         tmpserver = NULL;
 439     }
 440
 441     if (tmpdir) {
 442         g_rmdir(tmpdir);
 443         tmpdir = NULL;
 444     }
 445 }
 446
 447 static void abrt_handler(void *data)
 448 {
 449     cleanup();
 450 }
 451
 452 static gchar *mktempshm(int size, int *fd)
 453 {
 454     while (true) {
 455         gchar *name;
 456
 457         name = g_strdup_printf("/qtest-%u-%u", getpid(), g_random_int());
 458         *fd = shm_open(name, O_CREAT|O_RDWR|O_EXCL,
 459                        S_IRWXU|S_IRWXG|S_IRWXO);
 460         if (*fd > 0) {
 461             g_assert(ftruncate(*fd, size) == 0);
 462             return name;
 463         }
 464
 465         g_free(name);
 466
 467         if (errno != EEXIST) {
 468             perror("shm_open");
 469             return NULL;
 470         }
 471     }
 472 }
 473
 474 int main(int argc, char **argv)
 475 {
 476     int ret, fd;
 477     gchar dir[] = "/tmp/ivshmem-test.XXXXXX";
 478
 479 #if !GLIB_CHECK_VERSION(2, 31, 0)
 480     if (!g_thread_supported()) {
 481         g_thread_init(NULL);
 482     }
 483 #endif
 484
 485     g_test_init(&argc, &argv, NULL);
 486
 487     qtest_add_abrt_handler(abrt_handler, NULL);
 488     /* shm */
 489     tmpshm = mktempshm(TMPSHMSIZE, &fd);
 490     if (!tmpshm) {
 491         return 0;
 492     }
 493     tmpshmem = mmap(0, TMPSHMSIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
 494     g_assert(tmpshmem != MAP_FAILED);
 495     /* server */
 496     if (mkdtemp(dir) == NULL) {
 497         g_error("mkdtemp: %s", g_strerror(errno));
 498     }
 499     tmpdir = dir;
 500     tmpserver = g_strconcat(tmpdir, "/server", NULL);
 501
 502     qtest_add_func("/ivshmem/single", test_ivshmem_single);
 503     qtest_add_func("/ivshmem/hotplug", test_ivshmem_hotplug);
 504     qtest_add_func("/ivshmem/memdev", test_ivshmem_memdev);
 505     if (g_test_slow()) {
 506         qtest_add_func("/ivshmem/pair", test_ivshmem_pair);
 507         qtest_add_func("/ivshmem/server-msi", test_ivshmem_server_msi);
 508         qtest_add_func("/ivshmem/server-irq", test_ivshmem_server_irq);
 509     }
 510
 511     ret = g_test_run();
 512
 513     cleanup();
 514
 515     return ret;
 516 }