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