softmmu/qtest.c

   1 /*
   2  * Test Server
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #include "qemu/osdep.h"
  15 #include "qapi/error.h"
  16 #include "cpu.h"
  17 #include "sysemu/qtest.h"
  18 #include "sysemu/runstate.h"
  19 #include "chardev/char-fe.h"
  20 #include "exec/ioport.h"
  21 #include "exec/memory.h"
  22 #include "hw/irq.h"
  23 #include "qemu/accel.h"
  24 #include "sysemu/cpu-timers.h"
  25 #include "qemu/config-file.h"
  26 #include "qemu/option.h"
  27 #include "qemu/error-report.h"
  28 #include "qemu/module.h"
  29 #include "qemu/cutils.h"
  30 #include "qapi/qmp/qerror.h"
  31 #include "qom/object_interfaces.h"
  32 #include CONFIG_DEVICES
  33 #ifdef CONFIG_PSERIES
  34 #include "hw/ppc/spapr_rtas.h"
  35 #endif
  36
  37 #define MAX_IRQ 256
  38
  39 #define TYPE_QTEST "qtest"
  40
  41 OBJECT_DECLARE_SIMPLE_TYPE(QTest, QTEST)
  42
  43 struct QTest {
  44     Object parent;
  45
  46     bool has_machine_link;
  47     char *chr_name;
  48     Chardev *chr;
  49     CharBackend qtest_chr;
  50     char *log;
  51 };
  52
  53 bool qtest_allowed;
  54
  55 static DeviceState *irq_intercept_dev;
  56 static FILE *qtest_log_fp;
  57 static QTest *qtest;
  58 static GString *inbuf;
  59 static int irq_levels[MAX_IRQ];
  60 static qemu_timeval start_time;
  61 static bool qtest_opened;
  62 static void (*qtest_server_send)(void*, const char*);
  63 static void *qtest_server_send_opaque;
  64
  65 #define FMT_timeval "%ld.%06ld"
  66
  67 /**
  68  * DOC: QTest Protocol
  69  *
  70  * Line based protocol, request/response based.  Server can send async messages
  71  * so clients should always handle many async messages before the response
  72  * comes in.
  73  *
  74  * Valid requests
  75  * ^^^^^^^^^^^^^^
  76  *
  77  * Clock management:
  78  * """""""""""""""""
  79  *
  80  * The qtest client is completely in charge of the QEMU_CLOCK_VIRTUAL.  qtest commands
  81  * let you adjust the value of the clock (monotonically).  All the commands
  82  * return the current value of the clock in nanoseconds.
  83  *
  84  * .. code-block:: none
  85  *
  86  *  > clock_step
  87  *  < OK VALUE
  88  *
  89  * Advance the clock to the next deadline.  Useful when waiting for
  90  * asynchronous events.
  91  *
  92  * .. code-block:: none
  93  *
  94  *  > clock_step NS
  95  *  < OK VALUE
  96  *
  97  * Advance the clock by NS nanoseconds.
  98  *
  99  * .. code-block:: none
 100  *
 101  *  > clock_set NS
 102  *  < OK VALUE
 103  *
 104  * Advance the clock to NS nanoseconds (do nothing if it's already past).
 105  *
 106  * PIO and memory access:
 107  * """"""""""""""""""""""
 108  *
 109  * .. code-block:: none
 110  *
 111  *  > outb ADDR VALUE
 112  *  < OK
 113  *
 114  * .. code-block:: none
 115  *
 116  *  > outw ADDR VALUE
 117  *  < OK
 118  *
 119  * .. code-block:: none
 120  *
 121  *  > outl ADDR VALUE
 122  *  < OK
 123  *
 124  * .. code-block:: none
 125  *
 126  *  > inb ADDR
 127  *  < OK VALUE
 128  *
 129  * .. code-block:: none
 130  *
 131  *  > inw ADDR
 132  *  < OK VALUE
 133  *
 134  * .. code-block:: none
 135  *
 136  *  > inl ADDR
 137  *  < OK VALUE
 138  *
 139  * .. code-block:: none
 140  *
 141  *  > writeb ADDR VALUE
 142  *  < OK
 143  *
 144  * .. code-block:: none
 145  *
 146  *  > writew ADDR VALUE
 147  *  < OK
 148  *
 149  * .. code-block:: none
 150  *
 151  *  > writel ADDR VALUE
 152  *  < OK
 153  *
 154  * .. code-block:: none
 155  *
 156  *  > writeq ADDR VALUE
 157  *  < OK
 158  *
 159  * .. code-block:: none
 160  *
 161  *  > readb ADDR
 162  *  < OK VALUE
 163  *
 164  * .. code-block:: none
 165  *
 166  *  > readw ADDR
 167  *  < OK VALUE
 168  *
 169  * .. code-block:: none
 170  *
 171  *  > readl ADDR
 172  *  < OK VALUE
 173  *
 174  * .. code-block:: none
 175  *
 176  *  > readq ADDR
 177  *  < OK VALUE
 178  *
 179  * .. code-block:: none
 180  *
 181  *  > read ADDR SIZE
 182  *  < OK DATA
 183  *
 184  * .. code-block:: none
 185  *
 186  *  > write ADDR SIZE DATA
 187  *  < OK
 188  *
 189  * .. code-block:: none
 190  *
 191  *  > b64read ADDR SIZE
 192  *  < OK B64_DATA
 193  *
 194  * .. code-block:: none
 195  *
 196  *  > b64write ADDR SIZE B64_DATA
 197  *  < OK
 198  *
 199  * .. code-block:: none
 200  *
 201  *  > memset ADDR SIZE VALUE
 202  *  < OK
 203  *
 204  * ADDR, SIZE, VALUE are all integers parsed with strtoul() with a base of 0.
 205  * For 'memset' a zero size is permitted and does nothing.
 206  *
 207  * DATA is an arbitrarily long hex number prefixed with '0x'.  If it's smaller
 208  * than the expected size, the value will be zero filled at the end of the data
 209  * sequence.
 210  *
 211  * B64_DATA is an arbitrarily long base64 encoded string.
 212  * If the sizes do not match, the data will be truncated.
 213  *
 214  * IRQ management:
 215  * """""""""""""""
 216  *
 217  * .. code-block:: none
 218  *
 219  *  > irq_intercept_in QOM-PATH
 220  *  < OK
 221  *
 222  * .. code-block:: none
 223  *
 224  *  > irq_intercept_out QOM-PATH
 225  *  < OK
 226  *
 227  * Attach to the gpio-in (resp. gpio-out) pins exported by the device at
 228  * QOM-PATH.  When the pin is triggered, one of the following async messages
 229  * will be printed to the qtest stream::
 230  *
 231  *  IRQ raise NUM
 232  *  IRQ lower NUM
 233  *
 234  * where NUM is an IRQ number.  For the PC, interrupts can be intercepted
 235  * simply with "irq_intercept_in ioapic" (note that IRQ0 comes out with
 236  * NUM=0 even though it is remapped to GSI 2).
 237  *
 238  * Setting interrupt level:
 239  * """"""""""""""""""""""""
 240  *
 241  * .. code-block:: none
 242  *
 243  *  > set_irq_in QOM-PATH NAME NUM LEVEL
 244  *  < OK
 245  *
 246  * where NAME is the name of the irq/gpio list, NUM is an IRQ number and
 247  * LEVEL is an signed integer IRQ level.
 248  *
 249  * Forcibly set the given interrupt pin to the given level.
 250  *
 251  */
 252
 253 static int hex2nib(char ch)
 254 {
 255     if (ch >= '0' && ch <= '9') {
 256         return ch - '0';
 257     } else if (ch >= 'a' && ch <= 'f') {
 258         return 10 + (ch - 'a');
 259     } else if (ch >= 'A' && ch <= 'F') {
 260         return 10 + (ch - 'A');
 261     } else {
 262         return -1;
 263     }
 264 }
 265
 266 static void qtest_get_time(qemu_timeval *tv)
 267 {
 268     qemu_gettimeofday(tv);
 269     tv->tv_sec -= start_time.tv_sec;
 270     tv->tv_usec -= start_time.tv_usec;
 271     if (tv->tv_usec < 0) {
 272         tv->tv_usec += 1000000;
 273         tv->tv_sec -= 1;
 274     }
 275 }
 276
 277 static void qtest_send_prefix(CharBackend *chr)
 278 {
 279     qemu_timeval tv;
 280
 281     if (!qtest_log_fp || !qtest_opened) {
 282         return;
 283     }
 284
 285     qtest_get_time(&tv);
 286     fprintf(qtest_log_fp, "[S +" FMT_timeval "] ",
 287             (long) tv.tv_sec, (long) tv.tv_usec);
 288 }
 289
 290 static void GCC_FMT_ATTR(1, 2) qtest_log_send(const char *fmt, ...)
 291 {
 292     va_list ap;
 293
 294     if (!qtest_log_fp || !qtest_opened) {
 295         return;
 296     }
 297
 298     qtest_send_prefix(NULL);
 299
 300     va_start(ap, fmt);
 301     vfprintf(qtest_log_fp, fmt, ap);
 302     va_end(ap);
 303 }
 304
 305 static void qtest_server_char_be_send(void *opaque, const char *str)
 306 {
 307     size_t len = strlen(str);
 308     CharBackend* chr = (CharBackend *)opaque;
 309     qemu_chr_fe_write_all(chr, (uint8_t *)str, len);
 310     if (qtest_log_fp && qtest_opened) {
 311         fprintf(qtest_log_fp, "%s", str);
 312     }
 313 }
 314
 315 static void qtest_send(CharBackend *chr, const char *str)
 316 {
 317     qtest_server_send(qtest_server_send_opaque, str);
 318 }
 319
 320 static void GCC_FMT_ATTR(2, 3) qtest_sendf(CharBackend *chr,
 321                                            const char *fmt, ...)
 322 {
 323     va_list ap;
 324     gchar *buffer;
 325
 326     va_start(ap, fmt);
 327     buffer = g_strdup_vprintf(fmt, ap);
 328     qtest_send(chr, buffer);
 329     g_free(buffer);
 330     va_end(ap);
 331 }
 332
 333 static void qtest_irq_handler(void *opaque, int n, int level)
 334 {
 335     qemu_irq old_irq = *(qemu_irq *)opaque;
 336     qemu_set_irq(old_irq, level);
 337
 338     if (irq_levels[n] != level) {
 339         CharBackend *chr = &qtest->qtest_chr;
 340         irq_levels[n] = level;
 341         qtest_send_prefix(chr);
 342         qtest_sendf(chr, "IRQ %s %d\n",
 343                     level ? "raise" : "lower", n);
 344     }
 345 }
 346
 347 static int64_t qtest_clock_counter;
 348
 349 int64_t qtest_get_virtual_clock(void)
 350 {
 351     return qatomic_read_i64(&qtest_clock_counter);
 352 }
 353
 354 static void qtest_set_virtual_clock(int64_t count)
 355 {
 356     qatomic_set_i64(&qtest_clock_counter, count);
 357 }
 358
 359 static void qtest_clock_warp(int64_t dest)
 360 {
 361     int64_t clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
 362     AioContext *aio_context;
 363     assert(qtest_enabled());
 364     aio_context = qemu_get_aio_context();
 365     while (clock < dest) {
 366         int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL,
 367                                                       QEMU_TIMER_ATTR_ALL);
 368         int64_t warp = qemu_soonest_timeout(dest - clock, deadline);
 369
 370         qtest_set_virtual_clock(qtest_get_virtual_clock() + warp);
 371
 372         qemu_clock_run_timers(QEMU_CLOCK_VIRTUAL);
 373         timerlist_run_timers(aio_context->tlg.tl[QEMU_CLOCK_VIRTUAL]);
 374         clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
 375     }
 376     qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
 377 }
 378
 379 static void qtest_process_command(CharBackend *chr, gchar **words)
 380 {
 381     const gchar *command;
 382
 383     g_assert(words);
 384
 385     command = words[0];
 386
 387     if (qtest_log_fp) {
 388         qemu_timeval tv;
 389         int i;
 390
 391         qtest_get_time(&tv);
 392         fprintf(qtest_log_fp, "[R +" FMT_timeval "]",
 393                 (long) tv.tv_sec, (long) tv.tv_usec);
 394         for (i = 0; words[i]; i++) {
 395             fprintf(qtest_log_fp, " %s", words[i]);
 396         }
 397         fprintf(qtest_log_fp, "\n");
 398     }
 399
 400     g_assert(command);
 401     if (strcmp(words[0], "irq_intercept_out") == 0
 402         || strcmp(words[0], "irq_intercept_in") == 0) {
 403         DeviceState *dev;
 404         NamedGPIOList *ngl;
 405
 406         g_assert(words[1]);
 407         dev = DEVICE(object_resolve_path(words[1], NULL));
 408         if (!dev) {
 409             qtest_send_prefix(chr);
 410             qtest_send(chr, "FAIL Unknown device\n");
 411             return;
 412         }
 413
 414         if (irq_intercept_dev) {
 415             qtest_send_prefix(chr);
 416             if (irq_intercept_dev != dev) {
 417                 qtest_send(chr, "FAIL IRQ intercept already enabled\n");
 418             } else {
 419                 qtest_send(chr, "OK\n");
 420             }
 421             return;
 422         }
 423
 424         QLIST_FOREACH(ngl, &dev->gpios, node) {
 425             /* We don't support intercept of named GPIOs yet */
 426             if (ngl->name) {
 427                 continue;
 428             }
 429             if (words[0][14] == 'o') {
 430                 int i;
 431                 for (i = 0; i < ngl->num_out; ++i) {
 432                     qemu_irq *disconnected = g_new0(qemu_irq, 1);
 433                     qemu_irq icpt = qemu_allocate_irq(qtest_irq_handler,
 434                                                       disconnected, i);
 435
 436                     *disconnected = qdev_intercept_gpio_out(dev, icpt,
 437                                                             ngl->name, i);
 438                 }
 439             } else {
 440                 qemu_irq_intercept_in(ngl->in, qtest_irq_handler,
 441                                       ngl->num_in);
 442             }
 443         }
 444         irq_intercept_dev = dev;
 445         qtest_send_prefix(chr);
 446         qtest_send(chr, "OK\n");
 447     } else if (strcmp(words[0], "set_irq_in") == 0) {
 448         DeviceState *dev;
 449         qemu_irq irq;
 450         char *name;
 451         int ret;
 452         int num;
 453         int level;
 454
 455         g_assert(words[1] && words[2] && words[3] && words[4]);
 456
 457         dev = DEVICE(object_resolve_path(words[1], NULL));
 458         if (!dev) {
 459             qtest_send_prefix(chr);
 460             qtest_send(chr, "FAIL Unknown device\n");
 461             return;
 462         }
 463
 464         if (strcmp(words[2], "unnamed-gpio-in") == 0) {
 465             name = NULL;
 466         } else {
 467             name = words[2];
 468         }
 469
 470         ret = qemu_strtoi(words[3], NULL, 0, &num);
 471         g_assert(!ret);
 472         ret = qemu_strtoi(words[4], NULL, 0, &level);
 473         g_assert(!ret);
 474
 475         irq = qdev_get_gpio_in_named(dev, name, num);
 476
 477         qemu_set_irq(irq, level);
 478         qtest_send_prefix(chr);
 479         qtest_send(chr, "OK\n");
 480     } else if (strcmp(words[0], "outb") == 0 ||
 481                strcmp(words[0], "outw") == 0 ||
 482                strcmp(words[0], "outl") == 0) {
 483         unsigned long addr;
 484         unsigned long value;
 485         int ret;
 486
 487         g_assert(words[1] && words[2]);
 488         ret = qemu_strtoul(words[1], NULL, 0, &addr);
 489         g_assert(ret == 0);
 490         ret = qemu_strtoul(words[2], NULL, 0, &value);
 491         g_assert(ret == 0);
 492         g_assert(addr <= 0xffff);
 493
 494         if (words[0][3] == 'b') {
 495             cpu_outb(addr, value);
 496         } else if (words[0][3] == 'w') {
 497             cpu_outw(addr, value);
 498         } else if (words[0][3] == 'l') {
 499             cpu_outl(addr, value);
 500         }
 501         qtest_send_prefix(chr);
 502         qtest_send(chr, "OK\n");
 503     } else if (strcmp(words[0], "inb") == 0 ||
 504         strcmp(words[0], "inw") == 0 ||
 505         strcmp(words[0], "inl") == 0) {
 506         unsigned long addr;
 507         uint32_t value = -1U;
 508         int ret;
 509
 510         g_assert(words[1]);
 511         ret = qemu_strtoul(words[1], NULL, 0, &addr);
 512         g_assert(ret == 0);
 513         g_assert(addr <= 0xffff);
 514
 515         if (words[0][2] == 'b') {
 516             value = cpu_inb(addr);
 517         } else if (words[0][2] == 'w') {
 518             value = cpu_inw(addr);
 519         } else if (words[0][2] == 'l') {
 520             value = cpu_inl(addr);
 521         }
 522         qtest_send_prefix(chr);
 523         qtest_sendf(chr, "OK 0x%04x\n", value);
 524     } else if (strcmp(words[0], "writeb") == 0 ||
 525                strcmp(words[0], "writew") == 0 ||
 526                strcmp(words[0], "writel") == 0 ||
 527                strcmp(words[0], "writeq") == 0) {
 528         uint64_t addr;
 529         uint64_t value;
 530         int ret;
 531
 532         g_assert(words[1] && words[2]);
 533         ret = qemu_strtou64(words[1], NULL, 0, &addr);
 534         g_assert(ret == 0);
 535         ret = qemu_strtou64(words[2], NULL, 0, &value);
 536         g_assert(ret == 0);
 537
 538         if (words[0][5] == 'b') {
 539             uint8_t data = value;
 540             address_space_write(first_cpu->as, addr, MEMTXATTRS_UNSPECIFIED,
 541                                 &data, 1);
 542         } else if (words[0][5] == 'w') {
 543             uint16_t data = value;
 544             tswap16s(&data);
 545             address_space_write(first_cpu->as, addr, MEMTXATTRS_UNSPECIFIED,
 546                                 &data, 2);
 547         } else if (words[0][5] == 'l') {
 548             uint32_t data = value;
 549             tswap32s(&data);
 550             address_space_write(first_cpu->as, addr, MEMTXATTRS_UNSPECIFIED,
 551                                 &data, 4);
 552         } else if (words[0][5] == 'q') {
 553             uint64_t data = value;
 554             tswap64s(&data);
 555             address_space_write(first_cpu->as, addr, MEMTXATTRS_UNSPECIFIED,
 556                                 &data, 8);
 557         }
 558         qtest_send_prefix(chr);
 559         qtest_send(chr, "OK\n");
 560     } else if (strcmp(words[0], "readb") == 0 ||
 561                strcmp(words[0], "readw") == 0 ||
 562                strcmp(words[0], "readl") == 0 ||
 563                strcmp(words[0], "readq") == 0) {
 564         uint64_t addr;
 565         uint64_t value = UINT64_C(-1);
 566         int ret;
 567
 568         g_assert(words[1]);
 569         ret = qemu_strtou64(words[1], NULL, 0, &addr);
 570         g_assert(ret == 0);
 571
 572         if (words[0][4] == 'b') {
 573             uint8_t data;
 574             address_space_read(first_cpu->as, addr, MEMTXATTRS_UNSPECIFIED,
 575                                &data, 1);
 576             value = data;
 577         } else if (words[0][4] == 'w') {
 578             uint16_t data;
 579             address_space_read(first_cpu->as, addr, MEMTXATTRS_UNSPECIFIED,
 580                                &data, 2);
 581             value = tswap16(data);
 582         } else if (words[0][4] == 'l') {
 583             uint32_t data;
 584             address_space_read(first_cpu->as, addr, MEMTXATTRS_UNSPECIFIED,
 585                                &data, 4);
 586             value = tswap32(data);
 587         } else if (words[0][4] == 'q') {
 588             address_space_read(first_cpu->as, addr, MEMTXATTRS_UNSPECIFIED,
 589                                &value, 8);
 590             tswap64s(&value);
 591         }
 592         qtest_send_prefix(chr);
 593         qtest_sendf(chr, "OK 0x%016" PRIx64 "\n", value);
 594     } else if (strcmp(words[0], "read") == 0) {
 595         uint64_t addr, len, i;
 596         uint8_t *data;
 597         char *enc;
 598         int ret;
 599
 600         g_assert(words[1] && words[2]);
 601         ret = qemu_strtou64(words[1], NULL, 0, &addr);
 602         g_assert(ret == 0);
 603         ret = qemu_strtou64(words[2], NULL, 0, &len);
 604         g_assert(ret == 0);
 605         /* We'd send garbage to libqtest if len is 0 */
 606         g_assert(len);
 607
 608         data = g_malloc(len);
 609         address_space_read(first_cpu->as, addr, MEMTXATTRS_UNSPECIFIED, data,
 610                            len);
 611
 612         enc = g_malloc(2 * len + 1);
 613         for (i = 0; i < len; i++) {
 614             sprintf(&enc[i * 2], "%02x", data[i]);
 615         }
 616
 617         qtest_send_prefix(chr);
 618         qtest_sendf(chr, "OK 0x%s\n", enc);
 619
 620         g_free(data);
 621         g_free(enc);
 622     } else if (strcmp(words[0], "b64read") == 0) {
 623         uint64_t addr, len;
 624         uint8_t *data;
 625         gchar *b64_data;
 626         int ret;
 627
 628         g_assert(words[1] && words[2]);
 629         ret = qemu_strtou64(words[1], NULL, 0, &addr);
 630         g_assert(ret == 0);
 631         ret = qemu_strtou64(words[2], NULL, 0, &len);
 632         g_assert(ret == 0);
 633
 634         data = g_malloc(len);
 635         address_space_read(first_cpu->as, addr, MEMTXATTRS_UNSPECIFIED, data,
 636                            len);
 637         b64_data = g_base64_encode(data, len);
 638         qtest_send_prefix(chr);
 639         qtest_sendf(chr, "OK %s\n", b64_data);
 640
 641         g_free(data);
 642         g_free(b64_data);
 643     } else if (strcmp(words[0], "write") == 0) {
 644         uint64_t addr, len, i;
 645         uint8_t *data;
 646         size_t data_len;
 647         int ret;
 648
 649         g_assert(words[1] && words[2] && words[3]);
 650         ret = qemu_strtou64(words[1], NULL, 0, &addr);
 651         g_assert(ret == 0);
 652         ret = qemu_strtou64(words[2], NULL, 0, &len);
 653         g_assert(ret == 0);
 654
 655         data_len = strlen(words[3]);
 656         if (data_len < 3) {
 657             qtest_send(chr, "ERR invalid argument size\n");
 658             return;
 659         }
 660
 661         data = g_malloc(len);
 662         for (i = 0; i < len; i++) {
 663             if ((i * 2 + 4) <= data_len) {
 664                 data[i] = hex2nib(words[3][i * 2 + 2]) << 4;
 665                 data[i] |= hex2nib(words[3][i * 2 + 3]);
 666             } else {
 667                 data[i] = 0;
 668             }
 669         }
 670         address_space_write(first_cpu->as, addr, MEMTXATTRS_UNSPECIFIED, data,
 671                             len);
 672         g_free(data);
 673
 674         qtest_send_prefix(chr);
 675         qtest_send(chr, "OK\n");
 676     } else if (strcmp(words[0], "memset") == 0) {
 677         uint64_t addr, len;
 678         uint8_t *data;
 679         unsigned long pattern;
 680         int ret;
 681
 682         g_assert(words[1] && words[2] && words[3]);
 683         ret = qemu_strtou64(words[1], NULL, 0, &addr);
 684         g_assert(ret == 0);
 685         ret = qemu_strtou64(words[2], NULL, 0, &len);
 686         g_assert(ret == 0);
 687         ret = qemu_strtoul(words[3], NULL, 0, &pattern);
 688         g_assert(ret == 0);
 689
 690         if (len) {
 691             data = g_malloc(len);
 692             memset(data, pattern, len);
 693             address_space_write(first_cpu->as, addr, MEMTXATTRS_UNSPECIFIED,
 694                                 data, len);
 695             g_free(data);
 696         }
 697
 698         qtest_send_prefix(chr);
 699         qtest_send(chr, "OK\n");
 700     }  else if (strcmp(words[0], "b64write") == 0) {
 701         uint64_t addr, len;
 702         uint8_t *data;
 703         size_t data_len;
 704         gsize out_len;
 705         int ret;
 706
 707         g_assert(words[1] && words[2] && words[3]);
 708         ret = qemu_strtou64(words[1], NULL, 0, &addr);
 709         g_assert(ret == 0);
 710         ret = qemu_strtou64(words[2], NULL, 0, &len);
 711         g_assert(ret == 0);
 712
 713         data_len = strlen(words[3]);
 714         if (data_len < 3) {
 715             qtest_send(chr, "ERR invalid argument size\n");
 716             return;
 717         }
 718
 719         data = g_base64_decode_inplace(words[3], &out_len);
 720         if (out_len != len) {
 721             qtest_log_send("b64write: data length mismatch (told %"PRIu64", "
 722                            "found %zu)\n",
 723                            len, out_len);
 724             out_len = MIN(out_len, len);
 725         }
 726
 727         address_space_write(first_cpu->as, addr, MEMTXATTRS_UNSPECIFIED, data,
 728                             len);
 729
 730         qtest_send_prefix(chr);
 731         qtest_send(chr, "OK\n");
 732     } else if (strcmp(words[0], "endianness") == 0) {
 733         qtest_send_prefix(chr);
 734 #if defined(TARGET_WORDS_BIGENDIAN)
 735         qtest_sendf(chr, "OK big\n");
 736 #else
 737         qtest_sendf(chr, "OK little\n");
 738 #endif
 739 #ifdef CONFIG_PSERIES
 740     } else if (strcmp(words[0], "rtas") == 0) {
 741         uint64_t res, args, ret;
 742         unsigned long nargs, nret;
 743         int rc;
 744
 745         rc = qemu_strtoul(words[2], NULL, 0, &nargs);
 746         g_assert(rc == 0);
 747         rc = qemu_strtou64(words[3], NULL, 0, &args);
 748         g_assert(rc == 0);
 749         rc = qemu_strtoul(words[4], NULL, 0, &nret);
 750         g_assert(rc == 0);
 751         rc = qemu_strtou64(words[5], NULL, 0, &ret);
 752         g_assert(rc == 0);
 753         res = qtest_rtas_call(words[1], nargs, args, nret, ret);
 754
 755         qtest_send_prefix(chr);
 756         qtest_sendf(chr, "OK %"PRIu64"\n", res);
 757 #endif
 758     } else if (qtest_enabled() && strcmp(words[0], "clock_step") == 0) {
 759         int64_t ns;
 760
 761         if (words[1]) {
 762             int ret = qemu_strtoi64(words[1], NULL, 0, &ns);
 763             g_assert(ret == 0);
 764         } else {
 765             ns = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL,
 766                                             QEMU_TIMER_ATTR_ALL);
 767         }
 768         qtest_clock_warp(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + ns);
 769         qtest_send_prefix(chr);
 770         qtest_sendf(chr, "OK %"PRIi64"\n",
 771                     (int64_t)qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
 772     } else if (strcmp(words[0], "module_load") == 0) {
 773         g_assert(words[1] && words[2]);
 774
 775         qtest_send_prefix(chr);
 776         if (module_load_one(words[1], words[2], false)) {
 777             qtest_sendf(chr, "OK\n");
 778         } else {
 779             qtest_sendf(chr, "FAIL\n");
 780         }
 781     } else if (qtest_enabled() && strcmp(words[0], "clock_set") == 0) {
 782         int64_t ns;
 783         int ret;
 784
 785         g_assert(words[1]);
 786         ret = qemu_strtoi64(words[1], NULL, 0, &ns);
 787         g_assert(ret == 0);
 788         qtest_clock_warp(ns);
 789         qtest_send_prefix(chr);
 790         qtest_sendf(chr, "OK %"PRIi64"\n",
 791                     (int64_t)qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
 792     } else {
 793         qtest_send_prefix(chr);
 794         qtest_sendf(chr, "FAIL Unknown command '%s'\n", words[0]);
 795     }
 796 }
 797
 798 static void qtest_process_inbuf(CharBackend *chr, GString *inbuf)
 799 {
 800     char *end;
 801
 802     while ((end = strchr(inbuf->str, '\n')) != NULL) {
 803         size_t offset;
 804         GString *cmd;
 805         gchar **words;
 806
 807         offset = end - inbuf->str;
 808
 809         cmd = g_string_new_len(inbuf->str, offset);
 810         g_string_erase(inbuf, 0, offset + 1);
 811
 812         words = g_strsplit(cmd->str, " ", 0);
 813         qtest_process_command(chr, words);
 814         g_strfreev(words);
 815
 816         g_string_free(cmd, TRUE);
 817     }
 818 }
 819
 820 static void qtest_read(void *opaque, const uint8_t *buf, int size)
 821 {
 822     CharBackend *chr = opaque;
 823
 824     g_string_append_len(inbuf, (const gchar *)buf, size);
 825     qtest_process_inbuf(chr, inbuf);
 826 }
 827
 828 static int qtest_can_read(void *opaque)
 829 {
 830     return 1024;
 831 }
 832
 833 static void qtest_event(void *opaque, QEMUChrEvent event)
 834 {
 835     int i;
 836
 837     switch (event) {
 838     case CHR_EVENT_OPENED:
 839         /*
 840          * We used to call qemu_system_reset() here, hoping we could
 841          * use the same process for multiple tests that way.  Never
 842          * used.  Injects an extra reset even when it's not used, and
 843          * that can mess up tests, e.g. -boot once.
 844          */
 845         for (i = 0; i < ARRAY_SIZE(irq_levels); i++) {
 846             irq_levels[i] = 0;
 847         }
 848         qemu_gettimeofday(&start_time);
 849         qtest_opened = true;
 850         if (qtest_log_fp) {
 851             fprintf(qtest_log_fp, "[I " FMT_timeval "] OPENED\n",
 852                     (long) start_time.tv_sec, (long) start_time.tv_usec);
 853         }
 854         break;
 855     case CHR_EVENT_CLOSED:
 856         qtest_opened = false;
 857         if (qtest_log_fp) {
 858             qemu_timeval tv;
 859             qtest_get_time(&tv);
 860             fprintf(qtest_log_fp, "[I +" FMT_timeval "] CLOSED\n",
 861                     (long) tv.tv_sec, (long) tv.tv_usec);
 862         }
 863         break;
 864     default:
 865         break;
 866     }
 867 }
 868
 869 void qtest_server_init(const char *qtest_chrdev, const char *qtest_log, Error **errp)
 870 {
 871     ERRP_GUARD();
 872     Chardev *chr;
 873     Object *qtest;
 874
 875     chr = qemu_chr_new("qtest", qtest_chrdev, NULL);
 876     if (chr == NULL) {
 877         error_setg(errp, "Failed to initialize device for qtest: \"%s\"",
 878                    qtest_chrdev);
 879         return;
 880     }
 881
 882     qtest = object_new(TYPE_QTEST);
 883     object_property_set_str(qtest, "chardev", "qtest", &error_abort);
 884     if (qtest_log) {
 885         object_property_set_str(qtest, "log", qtest_log, &error_abort);
 886     }
 887     object_property_add_child(qdev_get_machine(), "qtest", qtest);
 888     user_creatable_complete(USER_CREATABLE(qtest), errp);
 889     if (*errp) {
 890         object_unparent(qtest);
 891     }
 892     object_unref(OBJECT(chr));
 893     object_unref(qtest);
 894 }
 895
 896 static bool qtest_server_start(QTest *q, Error **errp)
 897 {
 898     Chardev *chr = q->chr;
 899     const char *qtest_log = q->log;
 900
 901     if (qtest_log) {
 902         if (strcmp(qtest_log, "none") != 0) {
 903             qtest_log_fp = fopen(qtest_log, "w+");
 904         }
 905     } else {
 906         qtest_log_fp = stderr;
 907     }
 908
 909     if (!qemu_chr_fe_init(&q->qtest_chr, chr, errp)) {
 910         return false;
 911     }
 912     qemu_chr_fe_set_handlers(&q->qtest_chr, qtest_can_read, qtest_read,
 913                              qtest_event, NULL, &q->qtest_chr, NULL, true);
 914     qemu_chr_fe_set_echo(&q->qtest_chr, true);
 915
 916     inbuf = g_string_new("");
 917
 918     if (!qtest_server_send) {
 919         qtest_server_set_send_handler(qtest_server_char_be_send, &q->qtest_chr);
 920     }
 921     qtest = q;
 922     return true;
 923 }
 924
 925 void qtest_server_set_send_handler(void (*send)(void*, const char*),
 926                                    void *opaque)
 927 {
 928     qtest_server_send = send;
 929     qtest_server_send_opaque = opaque;
 930 }
 931
 932 bool qtest_driver(void)
 933 {
 934     return qtest && qtest->qtest_chr.chr != NULL;
 935 }
 936
 937 void qtest_server_inproc_recv(void *dummy, const char *buf)
 938 {
 939     static GString *gstr;
 940     if (!gstr) {
 941         gstr = g_string_new(NULL);
 942     }
 943     g_string_append(gstr, buf);
 944     if (gstr->str[gstr->len - 1] == '\n') {
 945         qtest_process_inbuf(NULL, gstr);
 946         g_string_truncate(gstr, 0);
 947     }
 948 }
 949
 950 static void qtest_complete(UserCreatable *uc, Error **errp)
 951 {
 952     QTest *q = QTEST(uc);
 953     if (qtest) {
 954         error_setg(errp, "Only one instance of qtest can be created");
 955         return;
 956     }
 957     if (!q->chr_name) {
 958         error_setg(errp, "No backend specified");
 959         return;
 960     }
 961
 962     if (OBJECT(uc)->parent != qdev_get_machine()) {
 963         q->has_machine_link = true;
 964         object_property_add_const_link(qdev_get_machine(), "qtest", OBJECT(uc));
 965     } else {
 966         /* -qtest was used.  */
 967     }
 968
 969     qtest_server_start(q, errp);
 970 }
 971
 972 static void qtest_unparent(Object *obj)
 973 {
 974     QTest *q = QTEST(obj);
 975
 976     if (qtest == q) {
 977         qemu_chr_fe_disconnect(&q->qtest_chr);
 978         assert(!qtest_opened);
 979         qemu_chr_fe_deinit(&q->qtest_chr, false);
 980         if (qtest_log_fp) {
 981             fclose(qtest_log_fp);
 982             qtest_log_fp = NULL;
 983         }
 984         qtest = NULL;
 985     }
 986
 987     if (q->has_machine_link) {
 988         object_property_del(qdev_get_machine(), "qtest");
 989         q->has_machine_link = false;
 990     }
 991 }
 992
 993 static void qtest_set_log(Object *obj, const char *value, Error **errp)
 994 {
 995     QTest *q = QTEST(obj);
 996
 997     if (qtest == q) {
 998         error_setg(errp, QERR_PERMISSION_DENIED);
 999     } else {
1000         g_free(q->log);
1001         q->log = g_strdup(value);
1002     }
1003 }
1004
1005 static char *qtest_get_log(Object *obj, Error **errp)
1006 {
1007     QTest *q = QTEST(obj);
1008
1009     return g_strdup(q->log);
1010 }
1011
1012 static void qtest_set_chardev(Object *obj, const char *value, Error **errp)
1013 {
1014     QTest *q = QTEST(obj);
1015     Chardev *chr;
1016
1017     if (qtest == q) {
1018         error_setg(errp, QERR_PERMISSION_DENIED);
1019         return;
1020     }
1021
1022     chr = qemu_chr_find(value);
1023     if (!chr) {
1024         error_setg(errp, "Cannot find character device '%s'", value);
1025         return;
1026     }
1027
1028     g_free(q->chr_name);
1029     q->chr_name = g_strdup(value);
1030
1031     if (q->chr) {
1032         object_unref(q->chr);
1033     }
1034     q->chr = chr;
1035     object_ref(chr);
1036 }
1037
1038 static char *qtest_get_chardev(Object *obj, Error **errp)
1039 {
1040     QTest *q = QTEST(obj);
1041
1042     return g_strdup(q->chr_name);
1043 }
1044
1045 static void qtest_class_init(ObjectClass *oc, void *data)
1046 {
1047     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
1048
1049     oc->unparent = qtest_unparent;
1050     ucc->complete = qtest_complete;
1051
1052     object_class_property_add_str(oc, "chardev",
1053                                   qtest_get_chardev, qtest_set_chardev);
1054     object_class_property_add_str(oc, "log",
1055                                   qtest_get_log, qtest_set_log);
1056 }
1057
1058 static const TypeInfo qtest_info = {
1059     .name = TYPE_QTEST,
1060     .parent = TYPE_OBJECT,
1061     .class_init = qtest_class_init,
1062     .instance_size = sizeof(QTest),
1063     .interfaces = (InterfaceInfo[]) {
1064         { TYPE_USER_CREATABLE },
1065         { }
1066     }
1067 };
1068
1069 static void register_types(void)
1070 {
1071     type_register_static(&qtest_info);
1072 }
1073
1074 type_init(register_types);