palacios/src/palacios/vmm_dev_mgr.c

   1 /*
   2  * This file is part of the Palacios Virtual Machine Monitor developed
   3  * by the V3VEE Project with funding from the United States National
   4  * Science Foundation and the Department of Energy.
   5  *
   6  * The V3VEE Project is a joint project between Northwestern University
   7  * and the University of New Mexico.  You can find out more at
   8  * http://www.v3vee.org
   9  *
  10  * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
  11  * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
  12  * All rights reserved.
  13  *
  14  * Author: Jack Lange <jarusl@cs.northwestern.edu>
  15  *
  16  * This is free software.  You are permitted to use,
  17  * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
  18  */
  19
  20 #include <palacios/vmm_dev_mgr.h>
  21 #include <palacios/vm_guest.h>
  22 #include <palacios/vmm.h>
  23 #include <palacios/vmm_decoder.h>
  24
  25 #ifdef V3_CONFIG_CHECKPOINT
  26 #include <palacios/vmm_checkpoint.h>
  27
  28 #define V3_MAX_DEVICE_NAME 32
  29
  30 #endif
  31
  32
  33 #ifndef V3_CONFIG_DEBUG_DEV_MGR
  34 #undef PrintDebug
  35 #define PrintDebug(fmt, args...)
  36 #endif
  37
  38
  39 static struct hashtable * master_dev_table = NULL;
  40
  41 static uint_t dev_hash_fn(addr_t key) {
  42     char * name = (char *)key;
  43     return v3_hash_buffer((uchar_t *)name, strlen(name));
  44 }
  45
  46 static int dev_eq_fn(addr_t key1, addr_t key2) {
  47     char * name1 = (char *)key1;
  48     char * name2 = (char *)key2;
  49
  50     return (strcmp(name1, name2) == 0);
  51 }
  52
  53
  54 int V3_init_devices() {
  55     extern struct v3_device_info __start__v3_devices[];
  56     extern struct v3_device_info __stop__v3_devices[];
  57     struct v3_device_info * tmp_dev =  __start__v3_devices;
  58     int i = 0;
  59
  60 #ifdef V3_CONFIG_DEBUG_DEV_MGR
  61     {
  62         int num_devices = (__stop__v3_devices - __start__v3_devices) / sizeof(struct v3_device_info);
  63         PrintDebug(VM_NONE, VCORE_NONE, "%d Virtual devices registered with Palacios\n", num_devices);
  64     }
  65 #endif
  66
  67     PrintDebug(VM_NONE, VCORE_NONE, "Start addres=%p, Stop address=%p\n", __start__v3_devices, __stop__v3_devices);
  68
  69     master_dev_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
  70
  71
  72
  73     while (tmp_dev != __stop__v3_devices) {
  74         V3_Print(VM_NONE, VCORE_NONE, "Registering Device: %s\n", tmp_dev->name);
  75
  76         if (v3_htable_search(master_dev_table, (addr_t)(tmp_dev->name))) {
  77             PrintError(VM_NONE, VCORE_NONE, "Multiple instance of device (%s)\n", tmp_dev->name);
  78             return -1;
  79         }
  80
  81         if (v3_htable_insert(master_dev_table,
  82                              (addr_t)(tmp_dev->name),
  83                              (addr_t)(tmp_dev->init)) == 0) {
  84             PrintError(VM_NONE, VCORE_NONE, "Could not add device %s to master list\n", tmp_dev->name);
  85             return -1;
  86         }
  87
  88         tmp_dev = &(__start__v3_devices[++i]);
  89     }
  90
  91
  92     return 0;
  93 }
  94
  95
  96 int V3_deinit_devices() {
  97     if (master_dev_table) {
  98         v3_free_htable(master_dev_table, 0, 0);
  99         master_dev_table=0;
 100     }
 101     return 0;
 102 }
 103
 104
 105 int v3_init_dev_mgr(struct v3_vm_info * vm) {
 106     struct vmm_dev_mgr * mgr = &(vm->dev_mgr);
 107
 108     INIT_LIST_HEAD(&(mgr->dev_list));
 109     mgr->num_devs = 0;
 110
 111     mgr->dev_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
 112
 113     INIT_LIST_HEAD(&(mgr->blk_list));
 114     INIT_LIST_HEAD(&(mgr->net_list));
 115     INIT_LIST_HEAD(&(mgr->char_list));
 116     INIT_LIST_HEAD(&(mgr->cons_list));
 117
 118     mgr->blk_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
 119     mgr->net_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
 120     mgr->char_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
 121     mgr->cons_table = v3_create_htable(0, dev_hash_fn, dev_eq_fn);
 122
 123     mgr->inited = 1;
 124
 125     return 0;
 126 }
 127
 128
 129 int v3_free_vm_devices(struct v3_vm_info * vm) {
 130     struct vmm_dev_mgr * mgr = &(vm->dev_mgr);
 131     struct vm_device * dev;
 132     struct vm_device * tmp;
 133
 134     if (mgr && mgr->num_devs > 0) {
 135         list_for_each_entry_safe(dev, tmp, &(mgr->dev_list), dev_link) {
 136             v3_remove_device(dev);
 137         }
 138     }
 139
 140     return 0;
 141 }
 142
 143 #ifdef V3_CONFIG_CHECKPOINT
 144
 145 int v3_save_vm_devices(struct v3_vm_info * vm, struct v3_chkpt * chkpt) {
 146     struct vmm_dev_mgr * mgr = &(vm->dev_mgr);
 147     struct vm_device * dev;
 148     struct v3_chkpt_ctx * dev_mgr_ctx = NULL;
 149
 150     uint32_t num_saved_devs = 0;
 151     uint32_t table_len = mgr->num_devs * V3_MAX_DEVICE_NAME;
 152     char * name_table = NULL;
 153     uint32_t tbl_offset = 0;
 154
 155     name_table = V3_Malloc(table_len);
 156
 157     if (!name_table) {
 158         PrintError(vm, VCORE_NONE, "Unable to allocate space in device manager save\n");
 159         return -1;
 160     }
 161
 162     memset(name_table, 0, table_len);
 163
 164     dev_mgr_ctx = v3_chkpt_open_ctx(chkpt, "devices");
 165
 166     if (!dev_mgr_ctx) {
 167         PrintError(vm, VCORE_NONE,"Unable to open device manager context\n");
 168         V3_Free(name_table);
 169         return -1;
 170     }
 171
 172     list_for_each_entry(dev, &(mgr->dev_list), dev_link) {
 173         if (dev->ops->save) {
 174             strncpy(name_table + tbl_offset, dev->name, V3_MAX_DEVICE_NAME);
 175             tbl_offset += V3_MAX_DEVICE_NAME;
 176             num_saved_devs++;
 177         }  else {
 178           PrintDebug(vm, VCORE_NONE, "Skipping device %s\n", dev->name);
 179         }
 180     }
 181
 182     if (v3_chkpt_save(dev_mgr_ctx, "num_devs", 4, &num_saved_devs) == -1) {
 183         PrintError(vm, VCORE_NONE,"Unable to store num_devs\n");
 184         v3_chkpt_close_ctx(dev_mgr_ctx);
 185         V3_Free(name_table);
 186         return -1;
 187     }
 188
 189     if (v3_chkpt_save(dev_mgr_ctx, "names", num_saved_devs*V3_MAX_DEVICE_NAME, name_table) == -1) {
 190         PrintError(vm, VCORE_NONE,"Unable to store names of devices\n");
 191         v3_chkpt_close_ctx(dev_mgr_ctx);
 192         V3_Free(name_table);
 193         return -1;
 194     }
 195
 196     v3_chkpt_close_ctx(dev_mgr_ctx);
 197
 198     V3_Free(name_table);
 199
 200     list_for_each_entry(dev, &(mgr->dev_list), dev_link) {
 201
 202       if (dev->ops->save_extended) {
 203
 204         V3_Print(vm, VCORE_NONE,"Saving state for device (%s) using extended interface\n",dev->name);
 205
 206         if (dev->ops->save_extended(chkpt,dev->name,dev->private_data)) {
 207           PrintError(vm, VCORE_NONE,"Unable to save device %s\n",dev->name);
 208           return -1;
 209         }
 210
 211       } else if (dev->ops->save) {
 212
 213         struct v3_chkpt_ctx * dev_ctx = NULL;
 214
 215         V3_Print(vm, VCORE_NONE,"Saving state for device (%s)\n", dev->name);
 216
 217         dev_ctx = v3_chkpt_open_ctx(chkpt, dev->name);
 218
 219         if (!dev_ctx) {
 220           PrintError(vm, VCORE_NONE,"Unable to open context for device %s\n",dev->name);
 221           return -1;
 222         }
 223
 224         if (dev->ops->save(dev_ctx, dev->private_data)) {
 225           PrintError(vm, VCORE_NONE,"Unable t save device %s\n",dev->name);
 226           v3_chkpt_close_ctx(dev_ctx);
 227           return -1;
 228         }
 229
 230         v3_chkpt_close_ctx(dev_ctx);
 231
 232       } else {
 233         PrintError(vm, VCORE_NONE,"Error: %s save() not implemented\n",  dev->name);
 234       }
 235     }
 236
 237     return 0;
 238 }
 239
 240
 241 int v3_load_vm_devices(struct v3_vm_info * vm, struct v3_chkpt * chkpt) {
 242     struct vm_device * dev;
 243     struct v3_chkpt_ctx * dev_mgr_ctx = NULL;
 244     uint32_t num_devs = 0;
 245     char * name_table = NULL;
 246     int i = 0;
 247
 248     dev_mgr_ctx = v3_chkpt_open_ctx(chkpt, "devices");
 249
 250     if (!dev_mgr_ctx) {
 251         PrintError(vm, VCORE_NONE,"Unable to open devices for load\n");
 252         return -1;
 253     }
 254
 255     if (v3_chkpt_load(dev_mgr_ctx, "num_devs", 4, &num_devs) == -1) {
 256         PrintError(vm, VCORE_NONE,"Unable to load num_devs\n");
 257         v3_chkpt_close_ctx(dev_mgr_ctx);
 258         return -1;
 259     }
 260
 261     V3_Print(vm, VCORE_NONE,"Loading State for %d devices\n", num_devs);
 262
 263     name_table = V3_Malloc(V3_MAX_DEVICE_NAME * num_devs);
 264
 265     if (!name_table) {
 266         PrintError(vm, VCORE_NONE,"Unable to allocate space for device table\n");
 267         v3_chkpt_close_ctx(dev_mgr_ctx);
 268         return -1;
 269     }
 270
 271     if (v3_chkpt_load(dev_mgr_ctx, "names", V3_MAX_DEVICE_NAME * num_devs, name_table) == -1) {
 272         PrintError(vm, VCORE_NONE,"Unable to load device name table\n");
 273         v3_chkpt_close_ctx(dev_mgr_ctx);
 274         V3_Free(name_table);
 275     }
 276
 277     v3_chkpt_close_ctx(dev_mgr_ctx);
 278
 279     for (i = 0; i < num_devs; i++) {
 280         char * name = &(name_table[i * V3_MAX_DEVICE_NAME]);
 281         struct v3_chkpt_ctx * dev_ctx = NULL;
 282         dev = v3_find_dev(vm, name);
 283
 284         if (!dev) {
 285             PrintError(vm, VCORE_NONE,"Tried to load state into non existant device: %s\n", name);
 286             return -1;
 287         }
 288
 289         if (dev->ops->load_extended) {
 290
 291           V3_Print(vm, VCORE_NONE,"Loading state for device (%s) using extended interface\n",name);
 292
 293           if (dev->ops->load_extended(chkpt,name,dev->private_data)) {
 294             PrintError(vm, VCORE_NONE,"Load of device %s failed\n",name);
 295             return -1;
 296           }
 297
 298         } else if (dev->ops->load) {
 299
 300           dev_ctx = v3_chkpt_open_ctx(chkpt, name);
 301
 302           if (!dev_ctx) {
 303             PrintError(vm, VCORE_NONE,"Error missing device context (%s)\n", name);
 304             return -1;
 305           }
 306
 307           if (dev->ops->load(dev_ctx, dev->private_data)) {
 308             PrintError(vm, VCORE_NONE,"Load of device %s failed\n",name);
 309             v3_chkpt_close_ctx(dev_ctx);
 310             return -1;
 311           }
 312
 313           // should close context regardless of whether load was successful
 314           v3_chkpt_close_ctx(dev_ctx);
 315
 316         }  else {
 317           PrintError(vm, VCORE_NONE,"Error Device (%s) does not support load operation\n", name);
 318           // this is OK
 319         }
 320     }
 321
 322     V3_Free(name_table);
 323
 324     return 0;
 325 }
 326
 327
 328 #endif
 329
 330 static int free_frontends(struct v3_vm_info * vm, struct vmm_dev_mgr * mgr);
 331
 332 int v3_deinit_dev_mgr(struct v3_vm_info * vm) {
 333     struct vmm_dev_mgr * mgr=0;
 334
 335     if (vm) {
 336         mgr = &(vm->dev_mgr);
 337         if (!mgr->inited) {
 338             return 0;
 339         }
 340     } else {
 341         return 0;
 342     }
 343
 344     // clear frontend lists
 345
 346     free_frontends(vm, mgr);
 347
 348     if (mgr->dev_table) {
 349         v3_free_htable(mgr->dev_table, 0, 0);
 350         mgr->dev_table=0;
 351     }
 352
 353     return 0;
 354 }
 355
 356
 357
 358 int v3_create_device(struct v3_vm_info * vm, const char * dev_name, v3_cfg_tree_t * cfg) {
 359     int (*dev_init)(struct v3_vm_info * vm, void * cfg_data);
 360
 361     dev_init = (void *)v3_htable_search(master_dev_table, (addr_t)dev_name);
 362
 363     if (dev_init == NULL) {
 364         PrintError(vm, VCORE_NONE,"Could not find device %s in master device table\n", dev_name);
 365         return -1;
 366     }
 367
 368
 369     if (dev_init(vm, cfg) == -1) {
 370         PrintError(vm, VCORE_NONE,"Could not initialize Device %s\n", dev_name);
 371         return -1;
 372     }
 373
 374     return 0;
 375 }
 376
 377
 378
 379
 380 struct vm_device * v3_find_dev(struct v3_vm_info * vm, const char * dev_name) {
 381     struct vmm_dev_mgr * mgr = &(vm->dev_mgr);
 382
 383     if (!dev_name) {
 384         return NULL;
 385     }
 386
 387     return (struct vm_device *)v3_htable_search(mgr->dev_table, (addr_t)dev_name);
 388 }
 389
 390
 391 /****************************************************************/
 392 /* The remaining functions are called by the devices themselves */
 393 /****************************************************************/
 394
 395 typedef enum {DEV_IO_HOOK, DEV_MSR_HOOK, DEV_CPUID_HOOK, DEV_MEM_HOOK, DEV_HCALL_HOOK} dev_rsrc_type_t;
 396
 397 struct dev_rsrc {
 398     dev_rsrc_type_t type;
 399     uint64_t rsrc;
 400
 401     struct list_head node;
 402 };
 403
 404
 405
 406 static int add_resource(struct vm_device * dev, dev_rsrc_type_t type, uint64_t rsrc_id) {
 407     struct dev_rsrc * resource = NULL;
 408
 409     resource = V3_Malloc(sizeof(struct dev_rsrc));
 410
 411     if (resource == NULL) {
 412         PrintError(VM_NONE, VCORE_NONE,"Error: Could not allocate device resource\n");
 413         return -1;
 414     }
 415
 416     resource->rsrc = rsrc_id;
 417     resource->type = type;
 418
 419     list_add(&(resource->node), &(dev->res_hooks));
 420     return 0;
 421 }
 422
 423 static int free_resource(struct vm_device * dev, dev_rsrc_type_t type, uint64_t rsrc_id) {
 424     struct dev_rsrc * resource = NULL;
 425     struct dev_rsrc * tmp;
 426
 427     list_for_each_entry_safe(resource, tmp, &(dev->res_hooks), node) {
 428         if ((resource->type == type) &&
 429             (resource->rsrc == rsrc_id)) {
 430
 431             list_del(&(resource->node));
 432             V3_Free(resource);
 433
 434             return 0;
 435         }
 436     }
 437
 438     return -1;
 439 }
 440
 441
 442 int v3_dev_hook_io(struct vm_device * dev, uint16_t port,
 443                    int (*read)(struct guest_info * core, uint16_t port, void * dst, uint_t length, void * priv_data),
 444                    int (*write)(struct guest_info * core, uint16_t port, void * src, uint_t length, void * priv_data)) {
 445     int ret = 0;
 446
 447     ret = v3_hook_io_port(dev->vm, port,
 448                           (int (*)(struct guest_info * core, uint16_t, void *, uint_t, void *))read,
 449                           (int (*)(struct guest_info * core, uint16_t, void *, uint_t, void *))write,
 450                           (void *)dev->private_data);
 451
 452     if (ret == -1) {
 453         return -1;
 454     }
 455
 456     if (add_resource(dev, DEV_IO_HOOK, port) == -1) {
 457         v3_unhook_io_port(dev->vm, port);
 458         PrintError(dev->vm, VCORE_NONE,"Could not allocate io hook dev state\n");
 459         return -1;
 460     }
 461
 462     return 0;
 463 }
 464
 465
 466 int v3_dev_unhook_io(struct vm_device * dev, uint16_t port) {
 467     if (free_resource(dev, DEV_IO_HOOK, port) == 0) {
 468         return v3_unhook_io_port(dev->vm, port);
 469     }
 470
 471     return -1;
 472 }
 473
 474
 475 int v3_dev_hook_msr(struct vm_device * dev, uint32_t msr,
 476                     int (*read)(struct guest_info * core, uint32_t msr, struct v3_msr * dst, void * priv_data),
 477                     int (*write)(struct guest_info * core, uint32_t msr, struct v3_msr src, void * priv_data)) {
 478     int ret = 0;
 479
 480     ret = v3_hook_msr(dev->vm, msr, read, write, dev->private_data);
 481
 482     if (ret == -1) {
 483         return -1;
 484     }
 485
 486     if (add_resource(dev, DEV_MSR_HOOK, msr) == -1) {
 487         v3_unhook_msr(dev->vm, msr);
 488         return -1;
 489     }
 490
 491     return 0;
 492 }
 493
 494 int v3_dev_unhook_msr(struct vm_device * dev, uint32_t msr) {
 495     if (free_resource(dev, DEV_MSR_HOOK, msr) == 0) {
 496         return v3_unhook_msr(dev->vm, msr);
 497     }
 498
 499     return -1;
 500 }
 501
 502
 503
 504
 505 int v3_remove_device(struct vm_device * dev) {
 506     struct vmm_dev_mgr * mgr = &(dev->vm->dev_mgr);
 507     struct dev_rsrc * resource = NULL;
 508     struct dev_rsrc * tmp;
 509
 510     list_for_each_entry_safe(resource, tmp, &(dev->res_hooks), node) {
 511         if (resource->type == DEV_IO_HOOK) {
 512             v3_unhook_io_port(dev->vm, (uint16_t)(resource->rsrc));
 513         } else if (resource->type == DEV_MSR_HOOK) {
 514             v3_unhook_msr(dev->vm, (uint32_t)(resource->rsrc));
 515         }
 516
 517         list_del(&(resource->node));
 518         V3_Free(resource);
 519     }
 520
 521     if (dev->ops->free) {
 522         dev->ops->free(dev->private_data);
 523     } else {
 524         PrintError(VM_NONE, VCORE_NONE,"Error: %s free() not implemented\n",  dev->name);
 525     }
 526
 527     list_del(&(dev->dev_link));
 528     mgr->num_devs--;
 529
 530     dev->vm = NULL;
 531
 532     V3_Free(dev);
 533     return -1;
 534 }
 535
 536
 537 struct vm_device * v3_add_device(struct v3_vm_info * vm,
 538                                  char * name,
 539                                  struct v3_device_ops * ops,
 540                                  void * private_data) {
 541     struct vmm_dev_mgr * mgr = &(vm->dev_mgr);
 542     struct vm_device * dev = NULL;
 543
 544
 545     // Check if we already registered a device of the same name
 546     if (v3_htable_search(mgr->dev_table, (addr_t)name) != (addr_t)NULL) {
 547         PrintError(vm, VCORE_NONE,"Device with name (%s) already registered with VM\n", name);
 548         return NULL;
 549     }
 550
 551     dev = (struct vm_device *)V3_Malloc(sizeof(struct vm_device));
 552
 553     if (dev == NULL) {
 554         PrintError(vm, VCORE_NONE,"Cannot allocate in adding a device\n");
 555         return NULL;
 556     }
 557
 558     INIT_LIST_HEAD(&(dev->res_hooks));
 559
 560     strncpy(dev->name, name, 32);
 561     dev->ops = ops;
 562     dev->private_data = private_data;
 563
 564     dev->vm = vm;
 565
 566     list_add(&(dev->dev_link), &(mgr->dev_list));
 567     mgr->num_devs++;
 568
 569     v3_htable_insert(mgr->dev_table, (addr_t)(dev->name), (addr_t)dev);
 570
 571     return dev;
 572 }
 573
 574
 575 void v3_print_dev_mgr(struct v3_vm_info * vm) {
 576     struct vmm_dev_mgr * mgr = &(vm->dev_mgr);
 577     struct vm_device * dev;
 578
 579     V3_Print(vm, VCORE_NONE,"%d devices registered with manager\n", mgr->num_devs);
 580
 581     list_for_each_entry(dev, &(mgr->dev_list), dev_link) {
 582         V3_Print(vm, VCORE_NONE,"Device: %s\n", dev->name);
 583     }
 584
 585     return;
 586 }
 587
 588
 589
 590
 591 struct blk_frontend {
 592     int (*connect)(struct v3_vm_info * vm,
 593                     void * frontend_data,
 594                     struct v3_dev_blk_ops * ops,
 595                     v3_cfg_tree_t * cfg,
 596                     void * priv_data);
 597
 598
 599     struct list_head blk_node;
 600
 601     void * priv_data;
 602 };
 603
 604
 605
 606 int v3_dev_add_blk_frontend(struct v3_vm_info * vm,
 607                             char * name,
 608                             int (*connect)(struct v3_vm_info * vm,
 609                                             void * frontend_data,
 610                                             struct v3_dev_blk_ops * ops,
 611                                             v3_cfg_tree_t * cfg,
 612                                             void * priv_data),
 613                             void * priv_data) {
 614
 615     struct blk_frontend * frontend = NULL;
 616
 617     frontend = (struct blk_frontend *)V3_Malloc(sizeof(struct blk_frontend));
 618
 619     if (!frontend) {
 620         PrintError(vm, VCORE_NONE,"Cannot allocate in adding a block front end\n");
 621         return -1;
 622     }
 623
 624     memset(frontend, 0, sizeof(struct blk_frontend));
 625
 626     frontend->connect = connect;
 627     frontend->priv_data = priv_data;
 628
 629     list_add(&(frontend->blk_node), &(vm->dev_mgr.blk_list));
 630     v3_htable_insert(vm->dev_mgr.blk_table, (addr_t)(name), (addr_t)frontend);
 631
 632     return 0;
 633 }
 634
 635 int v3_dev_connect_blk(struct v3_vm_info * vm,
 636                        char * frontend_name,
 637                        struct v3_dev_blk_ops * ops,
 638                        v3_cfg_tree_t * cfg,
 639                        void * private_data) {
 640
 641     struct blk_frontend * frontend = NULL;
 642
 643     frontend = (struct blk_frontend *)v3_htable_search(vm->dev_mgr.blk_table,
 644                                                        (addr_t)frontend_name);
 645
 646     if (frontend == NULL) {
 647         PrintError(vm, VCORE_NONE,"Could not find frontend blk device %s\n", frontend_name);
 648         return 0;
 649     }
 650
 651     if (frontend->connect(vm, frontend->priv_data, ops, cfg, private_data) == -1) {
 652         PrintError(vm, VCORE_NONE,"Error connecting to block frontend %s\n", frontend_name);
 653         return -1;
 654     }
 655
 656     return 0;
 657 }
 658
 659
 660
 661 struct net_frontend {
 662     int (*connect)(struct v3_vm_info * vm,
 663                     void * frontend_data,
 664                     struct v3_dev_net_ops * ops,
 665                     v3_cfg_tree_t * cfg,
 666                     void * priv_data);
 667
 668
 669     struct list_head net_node;
 670
 671     void * priv_data;
 672 };
 673
 674
 675 int v3_dev_add_net_frontend(struct v3_vm_info * vm,
 676                             char * name,
 677                             int (*connect)(struct v3_vm_info * vm,
 678                                             void * frontend_data,
 679                                             struct v3_dev_net_ops * ops,
 680                                             v3_cfg_tree_t * cfg,
 681                                             void * private_data),
 682                             void * priv_data)
 683 {
 684     struct net_frontend * frontend = NULL;
 685
 686     frontend = (struct net_frontend *)V3_Malloc(sizeof(struct net_frontend));
 687
 688     if (!frontend) {
 689         PrintError(vm, VCORE_NONE,"Cannot allocate in adding a net front end\n");
 690         return -1;
 691     }
 692
 693     memset(frontend, 0, sizeof(struct net_frontend));
 694
 695     frontend->connect = connect;
 696     frontend->priv_data = priv_data;
 697
 698     list_add(&(frontend->net_node), &(vm->dev_mgr.net_list));
 699     v3_htable_insert(vm->dev_mgr.net_table, (addr_t)(name), (addr_t)frontend);
 700
 701     return 0;
 702 }
 703
 704
 705 int v3_dev_connect_net(struct v3_vm_info * vm,
 706                        char * frontend_name,
 707                        struct v3_dev_net_ops * ops,
 708                        v3_cfg_tree_t * cfg,
 709                        void * private_data)
 710 {
 711     struct net_frontend * frontend = NULL;
 712
 713     frontend = (struct net_frontend *)v3_htable_search(vm->dev_mgr.net_table,
 714                                                        (addr_t)frontend_name);
 715
 716     if (frontend == NULL) {
 717         PrintError(vm, VCORE_NONE,"Could not find frontend net device %s\n", frontend_name);
 718         return 0;
 719     }
 720
 721     if (frontend->connect(vm, frontend->priv_data, ops, cfg, private_data) == -1) {
 722         PrintError(vm, VCORE_NONE,"Error connecting to net frontend %s\n", frontend_name);
 723         return -1;
 724     }
 725
 726     return 0;
 727 }
 728
 729
 730 struct cons_frontend {
 731     int (*connect)(struct v3_vm_info * vm,
 732                    void * frontend_data,
 733                    struct v3_dev_console_ops * ops,
 734                    v3_cfg_tree_t * cfg,
 735                    void * priv_data);
 736
 737
 738     struct list_head cons_node;
 739
 740     void * priv_data;
 741 };
 742
 743 int v3_dev_add_console_frontend(struct v3_vm_info * vm,
 744                                 char * name,
 745                                 int (*connect)(struct v3_vm_info * vm,
 746                                                void * frontend_data,
 747                                                struct v3_dev_console_ops * ops,
 748                                                v3_cfg_tree_t * cfg,
 749                                                void * private_data),
 750                                 void * priv_data)
 751 {
 752     struct cons_frontend * frontend = NULL;
 753
 754     frontend = (struct cons_frontend *)V3_Malloc(sizeof(struct cons_frontend));
 755
 756     if (!frontend) {
 757         PrintError(vm, VCORE_NONE,"Cannot allocate in adding a console front end\n");
 758         return -1;
 759     }
 760
 761     memset(frontend, 0, sizeof(struct cons_frontend));
 762
 763     frontend->connect = connect;
 764     frontend->priv_data = priv_data;
 765
 766     list_add(&(frontend->cons_node), &(vm->dev_mgr.cons_list));
 767     v3_htable_insert(vm->dev_mgr.cons_table, (addr_t)(name), (addr_t)frontend);
 768
 769     return 0;
 770 }
 771
 772
 773 int v3_dev_connect_console(struct v3_vm_info * vm,
 774                            char * frontend_name,
 775                            struct v3_dev_console_ops * ops,
 776                            v3_cfg_tree_t * cfg,
 777                            void * private_data)
 778 {
 779     struct cons_frontend * frontend = NULL;
 780
 781     frontend = (struct cons_frontend *)v3_htable_search(vm->dev_mgr.cons_table,
 782                                                         (addr_t)frontend_name);
 783
 784     if (frontend == NULL) {
 785         PrintError(vm, VCORE_NONE,"Could not find frontend console device %s\n", frontend_name);
 786         return 0;
 787     }
 788
 789     if (frontend->connect(vm, frontend->priv_data, ops, cfg, private_data) == -1) {
 790         PrintError(vm, VCORE_NONE,"Error connecting to console frontend %s\n", frontend_name);
 791         return -1;
 792     }
 793
 794     return 0;
 795 }
 796
 797 struct char_frontend {
 798     int (*connect)(struct v3_vm_info * vm,
 799                    void * frontend_data,
 800                    struct v3_dev_char_ops * ops,
 801                    v3_cfg_tree_t * cfg,
 802                    void * priv_data,
 803                    void ** push_fn_arg);
 804
 805
 806     struct list_head char_node;
 807
 808     void * priv_data;
 809 };
 810
 811 int v3_dev_add_char_frontend(struct v3_vm_info * vm,
 812                              char * name,
 813                              int (*connect)(struct v3_vm_info * vm,
 814                                             void * frontend_data,
 815                                             struct v3_dev_char_ops * ops,
 816                                             v3_cfg_tree_t * cfg,
 817                                             void * private_data,
 818                                             void ** push_fn_arg),
 819                              void * priv_data)
 820 {
 821     struct char_frontend * frontend = NULL;
 822
 823     frontend = (struct char_frontend *)V3_Malloc(sizeof(struct char_frontend));
 824
 825     if (!frontend) {
 826         PrintError(vm, VCORE_NONE,"Cannot allocate in adding a char front end\n");
 827         return -1;
 828     }
 829
 830     memset(frontend, 0, sizeof(struct char_frontend));
 831
 832     frontend->connect = connect;
 833     frontend->priv_data = priv_data;
 834
 835     list_add(&(frontend->char_node), &(vm->dev_mgr.char_list));
 836     v3_htable_insert(vm->dev_mgr.char_table, (addr_t)(name), (addr_t)frontend);
 837
 838     return 0;
 839 }
 840
 841
 842 int v3_dev_connect_char(struct v3_vm_info * vm,
 843                         char * frontend_name,
 844                         struct v3_dev_char_ops * ops,
 845                         v3_cfg_tree_t * cfg,
 846                         void * private_data,
 847                         void ** push_fn_arg)
 848 {
 849     struct char_frontend * frontend = NULL;
 850
 851     frontend = (struct char_frontend *)v3_htable_search(vm->dev_mgr.char_table,
 852                                                         (addr_t)frontend_name);
 853
 854     if (frontend == NULL) {
 855         PrintError(vm, VCORE_NONE,"Could not find frontend char device %s\n", frontend_name);
 856         return 0;
 857     }
 858
 859     if (frontend->connect(vm, frontend->priv_data, ops, cfg, private_data, push_fn_arg) == -1) {
 860         PrintError(vm, VCORE_NONE,"Error connecting to char frontend %s\n", frontend_name);
 861         return -1;
 862     }
 863
 864     return 0;
 865 }
 866
 867
 868
 869 static int free_frontends(struct v3_vm_info * vm, struct vmm_dev_mgr * mgr) {
 870     struct char_frontend * chr = NULL;
 871     struct char_frontend * tmp_chr = NULL;
 872     struct cons_frontend * cons = NULL;
 873     struct cons_frontend * tmp_cons = NULL;
 874     struct net_frontend * net = NULL;
 875     struct net_frontend * tmp_net = NULL;
 876     struct blk_frontend * blk = NULL;
 877     struct blk_frontend * tmp_blk = NULL;
 878
 879
 880
 881     list_for_each_entry_safe(chr, tmp_chr, &(mgr->char_list), char_node) {
 882         list_del(&(chr->char_node));
 883         V3_Free(chr);
 884     }
 885
 886     list_for_each_entry_safe(cons, tmp_cons, &(mgr->cons_list), cons_node) {
 887         list_del(&(cons->cons_node));
 888         V3_Free(cons);
 889     }
 890
 891     list_for_each_entry_safe(net, tmp_net, &(mgr->net_list), net_node) {
 892         list_del(&(net->net_node));
 893         V3_Free(net);
 894     }
 895
 896     list_for_each_entry_safe(blk, tmp_blk, &(mgr->blk_list), blk_node) {
 897         list_del(&(blk->blk_node));
 898         V3_Free(blk);
 899     }
 900
 901     v3_free_htable(mgr->blk_table, 0, 0);
 902     v3_free_htable(mgr->net_table, 0, 0);
 903     v3_free_htable(mgr->char_table, 0, 0);
 904     v3_free_htable(mgr->cons_table, 0, 0);
 905
 906
 907     return 0;
 908 }
 909
 910 int v3_attach_device(struct v3_vm_info * vm, struct vm_device * dev)
 911 {
 912   PrintError(vm, VCORE_NONE, "v3_attach_device is deprecated and no longer works\n");
 913   return -1;
 914 }
 915
 916 int v3_detach_device(struct vm_device * dev)
 917 {
 918   PrintError(VM_NONE, VCORE_NONE, "v3_detach_device is deprecated and no longer works\n");
 919   return -1;
 920 }
 921
 922 struct vm_device * v3_allocate_device(char * name, struct v3_device_ops * ops, void * private_data)
 923 {
 924   PrintError(VM_NONE, VCORE_NONE, "v3_allocate_device is deprecated and no longer works\n");
 925   return 0;
 926 }