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.h>
  13 #include <glib/gstdio.h>
  14 #include <sys/mman.h>
  15 #include "contrib/ivshmem-server/ivshmem-server.h"
  16 #include "libqos/pci-pc.h"
  17 #include "libqtest.h"
  18 #include "qemu-common.h"
  19
  20 #define TMPSHMSIZE (1 << 20)
  21 static char *tmpshm;
  22 static void *tmpshmem;
  23 static char *tmpdir;
  24 static char *tmpserver;
  25
  26 static void save_fn(QPCIDevice *dev, int devfn, void *data)
  27 {
  28     QPCIDevice **pdev = (QPCIDevice **) data;
  29
  30     *pdev = dev;
  31 }
  32
  33 static QPCIDevice *get_device(QPCIBus *pcibus)
  34 {
  35     QPCIDevice *dev;
  36
  37     dev = NULL;
  38     qpci_device_foreach(pcibus, 0x1af4, 0x1110, save_fn, &dev);
  39     g_assert(dev != NULL);
  40
  41     return dev;
  42 }
  43
  44 typedef struct _IVState {
  45     QTestState *qtest;
  46     void *reg_base, *mem_base;
  47     QPCIBus *pcibus;
  48     QPCIDevice *dev;
  49 } IVState;
  50
  51 enum Reg {
  52     INTRMASK = 0,
  53     INTRSTATUS = 4,
  54     IVPOSITION = 8,
  55     DOORBELL = 12,
  56 };
  57
  58 static const char* reg2str(enum Reg reg) {
  59     switch (reg) {
  60     case INTRMASK:
  61         return "IntrMask";
  62     case INTRSTATUS:
  63         return "IntrStatus";
  64     case IVPOSITION:
  65         return "IVPosition";
  66     case DOORBELL:
  67         return "DoorBell";
  68     default:
  69         return NULL;
  70     }
  71 }
  72
  73 static inline unsigned in_reg(IVState *s, enum Reg reg)
  74 {
  75     const char *name = reg2str(reg);
  76     QTestState *qtest = global_qtest;
  77     unsigned res;
  78
  79     global_qtest = s->qtest;
  80     res = qpci_io_readl(s->dev, s->reg_base + reg);
  81     g_test_message("*%s -> %x\n", name, res);
  82     global_qtest = qtest;
  83
  84     return res;
  85 }
  86
  87 static inline void out_reg(IVState *s, enum Reg reg, unsigned v)
  88 {
  89     const char *name = reg2str(reg);
  90     QTestState *qtest = global_qtest;
  91
  92     global_qtest = s->qtest;
  93     g_test_message("%x -> *%s\n", v, name);
  94     qpci_io_writel(s->dev, s->reg_base + reg, v);
  95     global_qtest = qtest;
  96 }
  97
  98 static void cleanup_vm(IVState *s)
  99 {
 100     g_free(s->dev);
 101     qpci_free_pc(s->pcibus);
 102     qtest_quit(s->qtest);
 103 }
 104
 105 static void setup_vm_cmd(IVState *s, const char *cmd, bool msix)
 106 {
 107     uint64_t barsize;
 108
 109     s->qtest = qtest_start(cmd);
 110     s->pcibus = qpci_init_pc();
 111     s->dev = get_device(s->pcibus);
 112
 113     s->reg_base = qpci_iomap(s->dev, 0, &barsize);
 114     g_assert_nonnull(s->reg_base);
 115     g_assert_cmpuint(barsize, ==, 256);
 116
 117     if (msix) {
 118         qpci_msix_enable(s->dev);
 119     }
 120
 121     s->mem_base = qpci_iomap(s->dev, 2, &barsize);
 122     g_assert_nonnull(s->mem_base);
 123     g_assert_cmpuint(barsize, ==, TMPSHMSIZE);
 124
 125     qpci_device_enable(s->dev);
 126 }
 127
 128 static void setup_vm(IVState *s)
 129 {
 130     char *cmd = g_strdup_printf("-device ivshmem,shm=%s,size=1M", 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,size=1M,chardev=chr0,vectors=%d,msi=%s",
 288                                 tmpserver, nvectors, msi ? "true" : "false");
 289
 290     setup_vm_cmd(s, cmd, msi);
 291
 292     g_free(cmd);
 293 }
 294
 295 static void test_ivshmem_server(bool msi)
 296 {
 297     IVState state1, state2, *s1, *s2;
 298     ServerThread thread;
 299     IvshmemServer server;
 300     int ret, vm1, vm2;
 301     int nvectors = 2;
 302     guint64 end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
 303
 304     memset(tmpshmem, 0x42, TMPSHMSIZE);
 305     ret = ivshmem_server_init(&server, tmpserver, tmpshm, true,
 306                               TMPSHMSIZE, nvectors,
 307                               g_test_verbose());
 308     g_assert_cmpint(ret, ==, 0);
 309
 310     ret = ivshmem_server_start(&server);
 311     g_assert_cmpint(ret, ==, 0);
 312
 313     setup_vm_with_server(&state1, nvectors, msi);
 314     s1 = &state1;
 315     setup_vm_with_server(&state2, nvectors, msi);
 316     s2 = &state2;
 317
 318     g_assert_cmpuint(in_reg(s1, IVPOSITION), ==, 0xffffffff);
 319     g_assert_cmpuint(in_reg(s2, IVPOSITION), ==, 0xffffffff);
 320
 321     g_assert_cmpuint(qtest_readb(s1->qtest, (uintptr_t)s1->mem_base), ==, 0x00);
 322
 323     thread.server = &server;
 324     ret = pipe(thread.pipe);
 325     g_assert_cmpint(ret, ==, 0);
 326     thread.thread = g_thread_new("ivshmem-server", server_thread, &thread);
 327     g_assert(thread.thread != NULL);
 328
 329     /* waiting until mapping is done */
 330     while (g_get_monotonic_time() < end_time) {
 331         g_usleep(1000);
 332
 333         if (qtest_readb(s1->qtest, (uintptr_t)s1->mem_base) == 0x42 &&
 334             qtest_readb(s2->qtest, (uintptr_t)s2->mem_base) == 0x42) {
 335             break;
 336         }
 337     }
 338
 339     /* check got different VM ids */
 340     vm1 = in_reg(s1, IVPOSITION);
 341     vm2 = in_reg(s2, IVPOSITION);
 342     g_assert_cmpuint(vm1, !=, vm2);
 343
 344     global_qtest = s1->qtest;
 345     if (msi) {
 346         ret = qpci_msix_table_size(s1->dev);
 347         g_assert_cmpuint(ret, ==, nvectors);
 348     }
 349
 350     /* ping vm2 -> vm1 */
 351     if (msi) {
 352         ret = qpci_msix_pending(s1->dev, 0);
 353         g_assert_cmpuint(ret, ==, 0);
 354     } else {
 355         out_reg(s1, INTRSTATUS, 0);
 356     }
 357     out_reg(s2, DOORBELL, vm1 << 16);
 358     do {
 359         g_usleep(10000);
 360         ret = msi ? qpci_msix_pending(s1->dev, 0) : in_reg(s1, INTRSTATUS);
 361     } while (ret == 0 && g_get_monotonic_time() < end_time);
 362     g_assert_cmpuint(ret, !=, 0);
 363
 364     /* ping vm1 -> vm2 */
 365     global_qtest = s2->qtest;
 366     if (msi) {
 367         ret = qpci_msix_pending(s2->dev, 0);
 368         g_assert_cmpuint(ret, ==, 0);
 369     } else {
 370         out_reg(s2, INTRSTATUS, 0);
 371     }
 372     out_reg(s1, DOORBELL, vm2 << 16);
 373     do {
 374         g_usleep(10000);
 375         ret = msi ? qpci_msix_pending(s2->dev, 0) : in_reg(s2, INTRSTATUS);
 376     } while (ret == 0 && g_get_monotonic_time() < end_time);
 377     g_assert_cmpuint(ret, !=, 0);
 378
 379     cleanup_vm(s2);
 380     cleanup_vm(s1);
 381
 382     if (qemu_write_full(thread.pipe[1], "q", 1) != 1) {
 383         g_error("qemu_write_full: %s", g_strerror(errno));
 384     }
 385
 386     g_thread_join(thread.thread);
 387
 388     ivshmem_server_close(&server);
 389     close(thread.pipe[1]);
 390     close(thread.pipe[0]);
 391 }
 392
 393 static void test_ivshmem_server_msi(void)
 394 {
 395     test_ivshmem_server(true);
 396 }
 397
 398 static void test_ivshmem_server_irq(void)
 399 {
 400     test_ivshmem_server(false);
 401 }
 402
 403 #define PCI_SLOT_HP             0x06
 404
 405 static void test_ivshmem_hotplug(void)
 406 {
 407     gchar *opts;
 408
 409     qtest_start("");
 410
 411     opts = g_strdup_printf("'shm': '%s', 'size': '1M'", tmpshm);
 412
 413     qpci_plug_device_test("ivshmem", "iv1", PCI_SLOT_HP, opts);
 414     qpci_unplug_acpi_device_test("iv1", PCI_SLOT_HP);
 415
 416     qtest_end();
 417     g_free(opts);
 418 }
 419
 420 static void test_ivshmem_memdev(void)
 421 {
 422     IVState state;
 423
 424     /* just for the sake of checking memory-backend property */
 425     setup_vm_cmd(&state, "-object memory-backend-ram,size=1M,id=mb1"
 426                  " -device ivshmem,x-memdev=mb1", false);
 427
 428     cleanup_vm(&state);
 429 }
 430
 431 static void cleanup(void)
 432 {
 433     if (tmpshmem) {
 434         munmap(tmpshmem, TMPSHMSIZE);
 435         tmpshmem = NULL;
 436     }
 437
 438     if (tmpshm) {
 439         shm_unlink(tmpshm);
 440         g_free(tmpshm);
 441         tmpshm = NULL;
 442     }
 443
 444     if (tmpserver) {
 445         g_unlink(tmpserver);
 446         g_free(tmpserver);
 447         tmpserver = NULL;
 448     }
 449
 450     if (tmpdir) {
 451         g_rmdir(tmpdir);
 452         tmpdir = NULL;
 453     }
 454 }
 455
 456 static void abrt_handler(void *data)
 457 {
 458     cleanup();
 459 }
 460
 461 static gchar *mktempshm(int size, int *fd)
 462 {
 463     while (true) {
 464         gchar *name;
 465
 466         name = g_strdup_printf("/qtest-%u-%u", getpid(), g_random_int());
 467         *fd = shm_open(name, O_CREAT|O_RDWR|O_EXCL,
 468                        S_IRWXU|S_IRWXG|S_IRWXO);
 469         if (*fd > 0) {
 470             g_assert(ftruncate(*fd, size) == 0);
 471             return name;
 472         }
 473
 474         g_free(name);
 475
 476         if (errno != EEXIST) {
 477             perror("shm_open");
 478             return NULL;
 479         }
 480     }
 481 }
 482
 483 int main(int argc, char **argv)
 484 {
 485     int ret, fd;
 486     gchar dir[] = "/tmp/ivshmem-test.XXXXXX";
 487
 488 #if !GLIB_CHECK_VERSION(2, 31, 0)
 489     if (!g_thread_supported()) {
 490         g_thread_init(NULL);
 491     }
 492 #endif
 493
 494     g_test_init(&argc, &argv, NULL);
 495
 496     qtest_add_abrt_handler(abrt_handler, NULL);
 497     /* shm */
 498     tmpshm = mktempshm(TMPSHMSIZE, &fd);
 499     if (!tmpshm) {
 500         return 0;
 501     }
 502     tmpshmem = mmap(0, TMPSHMSIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
 503     g_assert(tmpshmem != MAP_FAILED);
 504     /* server */
 505     if (mkdtemp(dir) == NULL) {
 506         g_error("mkdtemp: %s", g_strerror(errno));
 507     }
 508     tmpdir = dir;
 509     tmpserver = g_strconcat(tmpdir, "/server", NULL);
 510
 511     qtest_add_func("/ivshmem/single", test_ivshmem_single);
 512     qtest_add_func("/ivshmem/hotplug", test_ivshmem_hotplug);
 513     qtest_add_func("/ivshmem/memdev", test_ivshmem_memdev);
 514     if (g_test_slow()) {
 515         qtest_add_func("/ivshmem/pair", test_ivshmem_pair);
 516         qtest_add_func("/ivshmem/server-msi", test_ivshmem_server_msi);
 517         qtest_add_func("/ivshmem/server-irq", test_ivshmem_server_irq);
 518     }
 519
 520     ret = g_test_run();
 521
 522     cleanup();
 523
 524     return ret;
 525 }