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