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