hw/spapr_vio.c

   1 /*
   2  * QEMU sPAPR VIO code
   3  *
   4  * Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com>
   5  * Based on the s390 virtio bus code:
   6  * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include "hw.h"
  23 #include "sysemu.h"
  24 #include "boards.h"
  25 #include "monitor.h"
  26 #include "loader.h"
  27 #include "elf.h"
  28 #include "hw/sysbus.h"
  29 #include "kvm.h"
  30 #include "device_tree.h"
  31 #include "kvm_ppc.h"
  32
  33 #include "hw/spapr.h"
  34 #include "hw/spapr_vio.h"
  35
  36 #ifdef CONFIG_FDT
  37 #include <libfdt.h>
  38 #endif /* CONFIG_FDT */
  39
  40 /* #define DEBUG_SPAPR */
  41 /* #define DEBUG_TCE */
  42
  43 #ifdef DEBUG_SPAPR
  44 #define dprintf(fmt, ...) \
  45     do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  46 #else
  47 #define dprintf(fmt, ...) \
  48     do { } while (0)
  49 #endif
  50
  51 static struct BusInfo spapr_vio_bus_info = {
  52     .name       = "spapr-vio",
  53     .size       = sizeof(VIOsPAPRBus),
  54 };
  55
  56 VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg)
  57 {
  58     DeviceState *qdev;
  59     VIOsPAPRDevice *dev = NULL;
  60
  61     QLIST_FOREACH(qdev, &bus->bus.children, sibling) {
  62         dev = (VIOsPAPRDevice *)qdev;
  63         if (dev->reg == reg) {
  64             break;
  65         }
  66     }
  67
  68     return dev;
  69 }
  70
  71 #ifdef CONFIG_FDT
  72 static int vio_make_devnode(VIOsPAPRDevice *dev,
  73                             void *fdt)
  74 {
  75     VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)dev->qdev.info;
  76     int vdevice_off, node_off;
  77     int ret;
  78
  79     vdevice_off = fdt_path_offset(fdt, "/vdevice");
  80     if (vdevice_off < 0) {
  81         return vdevice_off;
  82     }
  83
  84     node_off = fdt_add_subnode(fdt, vdevice_off, dev->qdev.id);
  85     if (node_off < 0) {
  86         return node_off;
  87     }
  88
  89     ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg);
  90     if (ret < 0) {
  91         return ret;
  92     }
  93
  94     if (info->dt_type) {
  95         ret = fdt_setprop_string(fdt, node_off, "device_type",
  96                                  info->dt_type);
  97         if (ret < 0) {
  98             return ret;
  99         }
 100     }
 101
 102     if (info->dt_compatible) {
 103         ret = fdt_setprop_string(fdt, node_off, "compatible",
 104                                  info->dt_compatible);
 105         if (ret < 0) {
 106             return ret;
 107         }
 108     }
 109
 110     if (dev->qirq) {
 111         uint32_t ints_prop[] = {cpu_to_be32(dev->vio_irq_num), 0};
 112
 113         ret = fdt_setprop(fdt, node_off, "interrupts", ints_prop,
 114                           sizeof(ints_prop));
 115         if (ret < 0) {
 116             return ret;
 117         }
 118     }
 119
 120     if (dev->rtce_window_size) {
 121         uint32_t dma_prop[] = {cpu_to_be32(dev->reg),
 122                                0, 0,
 123                                0, cpu_to_be32(dev->rtce_window_size)};
 124
 125         ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-address-cells", 2);
 126         if (ret < 0) {
 127             return ret;
 128         }
 129
 130         ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-size-cells", 2);
 131         if (ret < 0) {
 132             return ret;
 133         }
 134
 135         ret = fdt_setprop(fdt, node_off, "ibm,my-dma-window", dma_prop,
 136                           sizeof(dma_prop));
 137         if (ret < 0) {
 138             return ret;
 139         }
 140     }
 141
 142     if (info->devnode) {
 143         ret = (info->devnode)(dev, fdt, node_off);
 144         if (ret < 0) {
 145             return ret;
 146         }
 147     }
 148
 149     return node_off;
 150 }
 151 #endif /* CONFIG_FDT */
 152
 153 /*
 154  * RTCE handling
 155  */
 156
 157 static void rtce_init(VIOsPAPRDevice *dev)
 158 {
 159     size_t size = (dev->rtce_window_size >> SPAPR_VIO_TCE_PAGE_SHIFT)
 160         * sizeof(VIOsPAPR_RTCE);
 161
 162     if (size) {
 163         dev->rtce_table = qemu_mallocz(size);
 164     }
 165 }
 166
 167 static target_ulong h_put_tce(CPUState *env, sPAPREnvironment *spapr,
 168                               target_ulong opcode, target_ulong *args)
 169 {
 170     target_ulong liobn = args[0];
 171     target_ulong ioba = args[1];
 172     target_ulong tce = args[2];
 173     VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, liobn);
 174     VIOsPAPR_RTCE *rtce;
 175
 176     if (!dev) {
 177         hcall_dprintf("spapr_vio_put_tce on non-existent LIOBN "
 178                       TARGET_FMT_lx "\n", liobn);
 179         return H_PARAMETER;
 180     }
 181
 182     ioba &= ~(SPAPR_VIO_TCE_PAGE_SIZE - 1);
 183
 184 #ifdef DEBUG_TCE
 185     fprintf(stderr, "spapr_vio_put_tce on %s  ioba 0x" TARGET_FMT_lx
 186             "  TCE 0x" TARGET_FMT_lx "\n", dev->qdev.id, ioba, tce);
 187 #endif
 188
 189     if (ioba >= dev->rtce_window_size) {
 190         hcall_dprintf("spapr_vio_put_tce on out-of-boards IOBA 0x"
 191                       TARGET_FMT_lx "\n", ioba);
 192         return H_PARAMETER;
 193     }
 194
 195     rtce = dev->rtce_table + (ioba >> SPAPR_VIO_TCE_PAGE_SHIFT);
 196     rtce->tce = tce;
 197
 198     return H_SUCCESS;
 199 }
 200
 201 int spapr_vio_check_tces(VIOsPAPRDevice *dev, target_ulong ioba,
 202                          target_ulong len, enum VIOsPAPR_TCEAccess access)
 203 {
 204     int start, end, i;
 205
 206     start = ioba >> SPAPR_VIO_TCE_PAGE_SHIFT;
 207     end = (ioba + len - 1) >> SPAPR_VIO_TCE_PAGE_SHIFT;
 208
 209     for (i = start; i <= end; i++) {
 210         if ((dev->rtce_table[i].tce & access) != access) {
 211 #ifdef DEBUG_TCE
 212             fprintf(stderr, "FAIL on %d\n", i);
 213 #endif
 214             return -1;
 215         }
 216     }
 217
 218     return 0;
 219 }
 220
 221 int spapr_tce_dma_write(VIOsPAPRDevice *dev, uint64_t taddr, const void *buf,
 222                         uint32_t size)
 223 {
 224 #ifdef DEBUG_TCE
 225     fprintf(stderr, "spapr_tce_dma_write taddr=0x%llx size=0x%x\n",
 226             (unsigned long long)taddr, size);
 227 #endif
 228
 229     /* Check for bypass */
 230     if (dev->flags & VIO_PAPR_FLAG_DMA_BYPASS) {
 231         cpu_physical_memory_write(taddr, buf, size);
 232         return 0;
 233     }
 234
 235     while (size) {
 236         uint64_t tce;
 237         uint32_t lsize;
 238         uint64_t txaddr;
 239
 240         /* Check if we are in bound */
 241         if (taddr >= dev->rtce_window_size) {
 242 #ifdef DEBUG_TCE
 243             fprintf(stderr, "spapr_tce_dma_write out of bounds\n");
 244 #endif
 245             return H_DEST_PARM;
 246         }
 247         tce = dev->rtce_table[taddr >> SPAPR_VIO_TCE_PAGE_SHIFT].tce;
 248
 249         /* How much til end of page ? */
 250         lsize = MIN(size, ((~taddr) & SPAPR_VIO_TCE_PAGE_MASK) + 1);
 251
 252         /* Check TCE */
 253         if (!(tce & 2)) {
 254             return H_DEST_PARM;
 255         }
 256
 257         /* Translate */
 258         txaddr = (tce & ~SPAPR_VIO_TCE_PAGE_MASK) |
 259             (taddr & SPAPR_VIO_TCE_PAGE_MASK);
 260
 261 #ifdef DEBUG_TCE
 262         fprintf(stderr, " -> write to txaddr=0x%llx, size=0x%x\n",
 263                 (unsigned long long)txaddr, lsize);
 264 #endif
 265
 266         /* Do it */
 267         cpu_physical_memory_write(txaddr, buf, lsize);
 268         buf += lsize;
 269         taddr += lsize;
 270         size -= lsize;
 271     }
 272     return 0;
 273 }
 274
 275 int spapr_tce_dma_zero(VIOsPAPRDevice *dev, uint64_t taddr, uint32_t size)
 276 {
 277     /* FIXME: allocating a temp buffer is nasty, but just stepping
 278      * through writing zeroes is awkward.  This will do for now. */
 279     uint8_t zeroes[size];
 280
 281 #ifdef DEBUG_TCE
 282     fprintf(stderr, "spapr_tce_dma_zero taddr=0x%llx size=0x%x\n",
 283             (unsigned long long)taddr, size);
 284 #endif
 285
 286     memset(zeroes, 0, size);
 287     return spapr_tce_dma_write(dev, taddr, zeroes, size);
 288 }
 289
 290 void stb_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint8_t val)
 291 {
 292     spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
 293 }
 294
 295 void sth_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint16_t val)
 296 {
 297     val = tswap16(val);
 298     spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
 299 }
 300
 301
 302 void stw_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint32_t val)
 303 {
 304     val = tswap32(val);
 305     spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
 306 }
 307
 308 void stq_tce(VIOsPAPRDevice *dev, uint64_t taddr, uint64_t val)
 309 {
 310     val = tswap64(val);
 311     spapr_tce_dma_write(dev, taddr, &val, sizeof(val));
 312 }
 313
 314 int spapr_tce_dma_read(VIOsPAPRDevice *dev, uint64_t taddr, void *buf,
 315                        uint32_t size)
 316 {
 317 #ifdef DEBUG_TCE
 318     fprintf(stderr, "spapr_tce_dma_write taddr=0x%llx size=0x%x\n",
 319             (unsigned long long)taddr, size);
 320 #endif
 321
 322     /* Check for bypass */
 323     if (dev->flags & VIO_PAPR_FLAG_DMA_BYPASS) {
 324         cpu_physical_memory_read(taddr, buf, size);
 325         return 0;
 326     }
 327
 328     while (size) {
 329         uint64_t tce;
 330         uint32_t lsize;
 331         uint64_t txaddr;
 332
 333         /* Check if we are in bound */
 334         if (taddr >= dev->rtce_window_size) {
 335 #ifdef DEBUG_TCE
 336             fprintf(stderr, "spapr_tce_dma_read out of bounds\n");
 337 #endif
 338             return H_DEST_PARM;
 339         }
 340         tce = dev->rtce_table[taddr >> SPAPR_VIO_TCE_PAGE_SHIFT].tce;
 341
 342         /* How much til end of page ? */
 343         lsize = MIN(size, ((~taddr) & SPAPR_VIO_TCE_PAGE_MASK) + 1);
 344
 345         /* Check TCE */
 346         if (!(tce & 1)) {
 347             return H_DEST_PARM;
 348         }
 349
 350         /* Translate */
 351         txaddr = (tce & ~SPAPR_VIO_TCE_PAGE_MASK) |
 352             (taddr & SPAPR_VIO_TCE_PAGE_MASK);
 353
 354 #ifdef DEBUG_TCE
 355         fprintf(stderr, " -> write to txaddr=0x%llx, size=0x%x\n",
 356                 (unsigned long long)txaddr, lsize);
 357 #endif
 358         /* Do it */
 359         cpu_physical_memory_read(txaddr, buf, lsize);
 360         buf += lsize;
 361         taddr += lsize;
 362         size -= lsize;
 363     }
 364     return H_SUCCESS;
 365 }
 366
 367 uint64_t ldq_tce(VIOsPAPRDevice *dev, uint64_t taddr)
 368 {
 369     uint64_t val;
 370
 371     spapr_tce_dma_read(dev, taddr, &val, sizeof(val));
 372     return tswap64(val);
 373 }
 374
 375 /*
 376  * CRQ handling
 377  */
 378 static target_ulong h_reg_crq(CPUState *env, sPAPREnvironment *spapr,
 379                               target_ulong opcode, target_ulong *args)
 380 {
 381     target_ulong reg = args[0];
 382     target_ulong queue_addr = args[1];
 383     target_ulong queue_len = args[2];
 384     VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
 385
 386     if (!dev) {
 387         hcall_dprintf("h_reg_crq on non-existent unit 0x"
 388                       TARGET_FMT_lx "\n", reg);
 389         return H_PARAMETER;
 390     }
 391
 392     /* We can't grok a queue size bigger than 256M for now */
 393     if (queue_len < 0x1000 || queue_len > 0x10000000) {
 394         hcall_dprintf("h_reg_crq, queue size too small or too big (0x%llx)\n",
 395                       (unsigned long long)queue_len);
 396         return H_PARAMETER;
 397     }
 398
 399     /* Check queue alignment */
 400     if (queue_addr & 0xfff) {
 401         hcall_dprintf("h_reg_crq, queue not aligned (0x%llx)\n",
 402                       (unsigned long long)queue_addr);
 403         return H_PARAMETER;
 404     }
 405
 406     /* Check if device supports CRQs */
 407     if (!dev->crq.SendFunc) {
 408         return H_NOT_FOUND;
 409     }
 410
 411
 412     /* Already a queue ? */
 413     if (dev->crq.qsize) {
 414         return H_RESOURCE;
 415     }
 416     dev->crq.qladdr = queue_addr;
 417     dev->crq.qsize = queue_len;
 418     dev->crq.qnext = 0;
 419
 420     dprintf("CRQ for dev 0x" TARGET_FMT_lx " registered at 0x"
 421             TARGET_FMT_lx "/0x" TARGET_FMT_lx "\n",
 422             reg, queue_addr, queue_len);
 423     return H_SUCCESS;
 424 }
 425
 426 static target_ulong h_free_crq(CPUState *env, sPAPREnvironment *spapr,
 427                                target_ulong opcode, target_ulong *args)
 428 {
 429     target_ulong reg = args[0];
 430     VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
 431
 432     if (!dev) {
 433         hcall_dprintf("h_free_crq on non-existent unit 0x"
 434                       TARGET_FMT_lx "\n", reg);
 435         return H_PARAMETER;
 436     }
 437
 438     dev->crq.qladdr = 0;
 439     dev->crq.qsize = 0;
 440     dev->crq.qnext = 0;
 441
 442     dprintf("CRQ for dev 0x" TARGET_FMT_lx " freed\n", reg);
 443
 444     return H_SUCCESS;
 445 }
 446
 447 static target_ulong h_send_crq(CPUState *env, sPAPREnvironment *spapr,
 448                                target_ulong opcode, target_ulong *args)
 449 {
 450     target_ulong reg = args[0];
 451     target_ulong msg_hi = args[1];
 452     target_ulong msg_lo = args[2];
 453     VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
 454     uint64_t crq_mangle[2];
 455
 456     if (!dev) {
 457         hcall_dprintf("h_send_crq on non-existent unit 0x"
 458                       TARGET_FMT_lx "\n", reg);
 459         return H_PARAMETER;
 460     }
 461     crq_mangle[0] = cpu_to_be64(msg_hi);
 462     crq_mangle[1] = cpu_to_be64(msg_lo);
 463
 464     if (dev->crq.SendFunc) {
 465         return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle);
 466     }
 467
 468     return H_HARDWARE;
 469 }
 470
 471 static target_ulong h_enable_crq(CPUState *env, sPAPREnvironment *spapr,
 472                                  target_ulong opcode, target_ulong *args)
 473 {
 474     target_ulong reg = args[0];
 475     VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
 476
 477     if (!dev) {
 478         hcall_dprintf("h_enable_crq on non-existent unit 0x"
 479                       TARGET_FMT_lx "\n", reg);
 480         return H_PARAMETER;
 481     }
 482
 483     return 0;
 484 }
 485
 486 /* Returns negative error, 0 success, or positive: queue full */
 487 int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq)
 488 {
 489     int rc;
 490     uint8_t byte;
 491
 492     if (!dev->crq.qsize) {
 493         fprintf(stderr, "spapr_vio_send_creq on uninitialized queue\n");
 494         return -1;
 495     }
 496
 497     /* Maybe do a fast path for KVM just writing to the pages */
 498     rc = spapr_tce_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1);
 499     if (rc) {
 500         return rc;
 501     }
 502     if (byte != 0) {
 503         return 1;
 504     }
 505
 506     rc = spapr_tce_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8,
 507                              &crq[8], 8);
 508     if (rc) {
 509         return rc;
 510     }
 511
 512     kvmppc_eieio();
 513
 514     rc = spapr_tce_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8);
 515     if (rc) {
 516         return rc;
 517     }
 518
 519     dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize;
 520
 521     if (dev->signal_state & 1) {
 522         qemu_irq_pulse(dev->qirq);
 523     }
 524
 525     return 0;
 526 }
 527
 528 /* "quiesce" handling */
 529
 530 static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev)
 531 {
 532     dev->flags &= ~VIO_PAPR_FLAG_DMA_BYPASS;
 533
 534     if (dev->rtce_table) {
 535         size_t size = (dev->rtce_window_size >> SPAPR_VIO_TCE_PAGE_SHIFT)
 536             * sizeof(VIOsPAPR_RTCE);
 537         memset(dev->rtce_table, 0, size);
 538     }
 539
 540     dev->crq.qladdr = 0;
 541     dev->crq.qsize = 0;
 542     dev->crq.qnext = 0;
 543 }
 544
 545 static void rtas_set_tce_bypass(sPAPREnvironment *spapr, uint32_t token,
 546                                 uint32_t nargs, target_ulong args,
 547                                 uint32_t nret, target_ulong rets)
 548 {
 549     VIOsPAPRBus *bus = spapr->vio_bus;
 550     VIOsPAPRDevice *dev;
 551     uint32_t unit, enable;
 552
 553     if (nargs != 2) {
 554         rtas_st(rets, 0, -3);
 555         return;
 556     }
 557     unit = rtas_ld(args, 0);
 558     enable = rtas_ld(args, 1);
 559     dev = spapr_vio_find_by_reg(bus, unit);
 560     if (!dev) {
 561         rtas_st(rets, 0, -3);
 562         return;
 563     }
 564     if (enable) {
 565         dev->flags |= VIO_PAPR_FLAG_DMA_BYPASS;
 566     } else {
 567         dev->flags &= ~VIO_PAPR_FLAG_DMA_BYPASS;
 568     }
 569
 570     rtas_st(rets, 0, 0);
 571 }
 572
 573 static void rtas_quiesce(sPAPREnvironment *spapr, uint32_t token,
 574                          uint32_t nargs, target_ulong args,
 575                          uint32_t nret, target_ulong rets)
 576 {
 577     VIOsPAPRBus *bus = spapr->vio_bus;
 578     DeviceState *qdev;
 579     VIOsPAPRDevice *dev = NULL;
 580
 581     if (nargs != 0) {
 582         rtas_st(rets, 0, -3);
 583         return;
 584     }
 585
 586     QLIST_FOREACH(qdev, &bus->bus.children, sibling) {
 587         dev = (VIOsPAPRDevice *)qdev;
 588         spapr_vio_quiesce_one(dev);
 589     }
 590
 591     rtas_st(rets, 0, 0);
 592 }
 593
 594 static int spapr_vio_busdev_init(DeviceState *qdev, DeviceInfo *qinfo)
 595 {
 596     VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)qinfo;
 597     VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev;
 598     char *id;
 599
 600     if (asprintf(&id, "%s@%x", info->dt_name, dev->reg) < 0) {
 601         return -1;
 602     }
 603
 604     dev->qdev.id = id;
 605
 606     rtce_init(dev);
 607
 608     return info->init(dev);
 609 }
 610
 611 void spapr_vio_bus_register_withprop(VIOsPAPRDeviceInfo *info)
 612 {
 613     info->qdev.init = spapr_vio_busdev_init;
 614     info->qdev.bus_info = &spapr_vio_bus_info;
 615
 616     assert(info->qdev.size >= sizeof(VIOsPAPRDevice));
 617     qdev_register(&info->qdev);
 618 }
 619
 620 static target_ulong h_vio_signal(CPUState *env, sPAPREnvironment *spapr,
 621                                  target_ulong opcode,
 622                                  target_ulong *args)
 623 {
 624     target_ulong reg = args[0];
 625     target_ulong mode = args[1];
 626     VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
 627     VIOsPAPRDeviceInfo *info;
 628
 629     if (!dev) {
 630         return H_PARAMETER;
 631     }
 632
 633     info = (VIOsPAPRDeviceInfo *)dev->qdev.info;
 634
 635     if (mode & ~info->signal_mask) {
 636         return H_PARAMETER;
 637     }
 638
 639     dev->signal_state = mode;
 640
 641     return H_SUCCESS;
 642 }
 643
 644 VIOsPAPRBus *spapr_vio_bus_init(void)
 645 {
 646     VIOsPAPRBus *bus;
 647     BusState *qbus;
 648     DeviceState *dev;
 649     DeviceInfo *qinfo;
 650
 651     /* Create bridge device */
 652     dev = qdev_create(NULL, "spapr-vio-bridge");
 653     qdev_init_nofail(dev);
 654
 655     /* Create bus on bridge device */
 656
 657     qbus = qbus_create(&spapr_vio_bus_info, dev, "spapr-vio");
 658     bus = DO_UPCAST(VIOsPAPRBus, bus, qbus);
 659
 660     /* hcall-vio */
 661     spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal);
 662
 663     /* hcall-tce */
 664     spapr_register_hypercall(H_PUT_TCE, h_put_tce);
 665
 666     /* hcall-crq */
 667     spapr_register_hypercall(H_REG_CRQ, h_reg_crq);
 668     spapr_register_hypercall(H_FREE_CRQ, h_free_crq);
 669     spapr_register_hypercall(H_SEND_CRQ, h_send_crq);
 670     spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq);
 671
 672     /* RTAS calls */
 673     spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass);
 674     spapr_rtas_register("quiesce", rtas_quiesce);
 675
 676     for (qinfo = device_info_list; qinfo; qinfo = qinfo->next) {
 677         VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)qinfo;
 678
 679         if (qinfo->bus_info != &spapr_vio_bus_info) {
 680             continue;
 681         }
 682
 683         if (info->hcalls) {
 684             info->hcalls(bus);
 685         }
 686     }
 687
 688     return bus;
 689 }
 690
 691 /* Represents sPAPR hcall VIO devices */
 692
 693 static int spapr_vio_bridge_init(SysBusDevice *dev)
 694 {
 695     /* nothing */
 696     return 0;
 697 }
 698
 699 static SysBusDeviceInfo spapr_vio_bridge_info = {
 700     .init = spapr_vio_bridge_init,
 701     .qdev.name  = "spapr-vio-bridge",
 702     .qdev.size  = sizeof(SysBusDevice),
 703     .qdev.no_user = 1,
 704 };
 705
 706 static void spapr_vio_register_devices(void)
 707 {
 708     sysbus_register_withprop(&spapr_vio_bridge_info);
 709 }
 710
 711 device_init(spapr_vio_register_devices)
 712
 713 #ifdef CONFIG_FDT
 714 int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt)
 715 {
 716     DeviceState *qdev;
 717     int ret = 0;
 718
 719     QLIST_FOREACH(qdev, &bus->bus.children, sibling) {
 720         VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev;
 721
 722         ret = vio_make_devnode(dev, fdt);
 723
 724         if (ret < 0) {
 725             return ret;
 726         }
 727     }
 728
 729     return 0;
 730 }
 731 #endif /* CONFIG_FDT */