palacios/src/palacios/svm.c

   1 #include <palacios/svm.h>
   2 #include <palacios/vmm.h>
   3
   4 #include <palacios/vmcb.h>
   5 #include <palacios/vmm_mem.h>
   6 #include <palacios/vmm_paging.h>
   7 #include <palacios/svm_handler.h>
   8
   9 #include <palacios/vmm_debug.h>
  10 #include <palacios/vm_guest_mem.h>
  11
  12
  13 /* TEMPORARY BECAUSE SVM IS WEIRD */
  14 //#include <palacios/tss.h>
  15 /* ** */
  16
  17
  18 extern struct vmm_os_hooks * os_hooks;
  19
  20 extern uint_t cpuid_ecx(uint_t op);
  21 extern uint_t cpuid_edx(uint_t op);
  22 extern void Get_MSR(uint_t MSR, uint_t * high_byte, uint_t * low_byte);
  23 extern void Set_MSR(uint_t MSR, uint_t high_byte, uint_t low_byte);
  24 extern uint_t launch_svm(vmcb_t * vmcb_addr);
  25 extern void safe_svm_launch(vmcb_t * vmcb_addr, struct guest_gprs * gprs);
  26
  27 extern uint_t Get_CR3();
  28
  29 extern void GetGDTR(void * gdt);
  30 extern void GetIDTR(void * idt);
  31
  32 extern void DisableInts();
  33
  34 /* Checks machine SVM capability */
  35 /* Implemented from: AMD Arch Manual 3, sect 15.4 */
  36 int is_svm_capable() {
  37   uint_t ret =  cpuid_ecx(CPUID_FEATURE_IDS);
  38   uint_t vm_cr_low = 0, vm_cr_high = 0;
  39
  40
  41   if ((ret & CPUID_FEATURE_IDS_ecx_svm_avail) == 0) {
  42     PrintDebug("SVM Not Available\n");
  43     return 0;
  44   }
  45
  46   Get_MSR(SVM_VM_CR_MSR, &vm_cr_high, &vm_cr_low);
  47
  48   if ((ret & CPUID_SVM_REV_AND_FEATURE_IDS_edx_np) == 1) {
  49     PrintDebug("Nested Paging not supported\n");
  50   }
  51
  52   if ((vm_cr_low & SVM_VM_CR_MSR_svmdis) == 0) {
  53     return 1;
  54   }
  55
  56   ret = cpuid_edx(CPUID_SVM_REV_AND_FEATURE_IDS);
  57
  58   if ((ret & CPUID_SVM_REV_AND_FEATURE_IDS_edx_svml) == 0) {
  59     PrintDebug("SVM BIOS Disabled, not unlockable\n");
  60   } else {
  61     PrintDebug("SVM is locked with a key\n");
  62   }
  63
  64   return 0;
  65 }
  66
  67
  68
  69 void Init_SVM(struct vmm_ctrl_ops * vmm_ops) {
  70   reg_ex_t msr;
  71   void * host_state;
  72
  73
  74   // Enable SVM on the CPU
  75   Get_MSR(EFER_MSR, &(msr.e_reg.high), &(msr.e_reg.low));
  76   msr.e_reg.low |= EFER_MSR_svm_enable;
  77   Set_MSR(EFER_MSR, 0, msr.e_reg.low);
  78
  79   PrintDebug("SVM Enabled\n");
  80
  81
  82   // Setup the host state save area
  83   host_state = os_hooks->allocate_pages(4);
  84
  85   msr.e_reg.high = 0;
  86   msr.e_reg.low = (uint_t)host_state;
  87
  88
  89   PrintDebug("Host State being saved at %x\n", (uint_t)host_state);
  90   Set_MSR(SVM_VM_HSAVE_PA_MSR, msr.e_reg.high, msr.e_reg.low);
  91
  92
  93
  94   // Setup the SVM specific vmm operations
  95   vmm_ops->init_guest = &init_svm_guest;
  96   vmm_ops->start_guest = &start_svm_guest;
  97
  98
  99   return;
 100 }
 101
 102
 103 int init_svm_guest(struct guest_info *info) {
 104
 105   PrintDebug("Allocating VMCB\n");
 106   info->vmm_data = (void*)Allocate_VMCB();
 107
 108
 109   //PrintDebug("Generating Guest nested page tables\n");
 110   //  info->page_tables = NULL;
 111   //info->page_tables = generate_guest_page_tables_64(&(info->mem_layout), &(info->mem_list));
 112   //info->page_tables = generate_guest_page_tables(&(info->mem_layout), &(info->mem_list));
 113   //  PrintDebugPageTables(info->page_tables);
 114
 115
 116   PrintDebug("Initializing VMCB (addr=%x)\n", info->vmm_data);
 117   Init_VMCB_BIOS((vmcb_t*)(info->vmm_data), *info);
 118
 119
 120   //  info->rip = 0;
 121
 122   info->vm_regs.rdi = 0;
 123   info->vm_regs.rsi = 0;
 124   info->vm_regs.rbp = 0;
 125   info->vm_regs.rsp = 0;
 126   info->vm_regs.rbx = 0;
 127   info->vm_regs.rdx = 0;
 128   info->vm_regs.rcx = 0;
 129   info->vm_regs.rax = 0;
 130
 131   return 0;
 132 }
 133
 134
 135 // can we start a kernel thread here...
 136 int start_svm_guest(struct guest_info *info) {
 137
 138
 139
 140   PrintDebug("Launching SVM VM (vmcb=%x)\n", info->vmm_data);
 141   //PrintDebugVMCB((vmcb_t*)(info->vmm_data));
 142
 143   while (1) {
 144
 145     //PrintDebug("SVM Launch Args (vmcb=%x), (info=%x), (vm_regs=%x)\n", info->vmm_data,  &(info->vm_regs));
 146     //PrintDebug("Launching to RIP: %x\n", info->rip);
 147     safe_svm_launch((vmcb_t*)(info->vmm_data), &(info->vm_regs));
 148     //launch_svm((vmcb_t*)(info->vmm_data));
 149     //PrintDebug("SVM Returned\n");
 150
 151     if (handle_svm_exit(info) != 0) {
 152       // handle exit code....
 153       break;
 154     }
 155   }
 156   return 0;
 157 }
 158
 159
 160
 161 vmcb_t * Allocate_VMCB() {
 162   vmcb_t * vmcb_page = (vmcb_t*)os_hooks->allocate_pages(1);
 163
 164
 165   memset(vmcb_page, 0, 4096);
 166
 167   return vmcb_page;
 168 }
 169
 170
 171
 172 void Init_VMCB(vmcb_t * vmcb, struct guest_info vm_info) {
 173   vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
 174   vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA(vmcb);
 175   uint_t i;
 176
 177
 178   guest_state->rsp = vm_info.vm_regs.rsp;
 179   guest_state->rip = vm_info.rip;
 180
 181
 182   //ctrl_area->instrs.instrs.CR0 = 1;
 183   ctrl_area->cr_reads.cr0 = 1;
 184   ctrl_area->cr_writes.cr0 = 1;
 185
 186   guest_state->efer |= EFER_MSR_svm_enable;
 187   guest_state->rflags = 0x00000002; // The reserved bit is always 1
 188   ctrl_area->svm_instrs.VMRUN = 1;
 189   // guest_state->cr0 = 0x00000001;    // PE
 190   ctrl_area->guest_ASID = 1;
 191
 192
 193   ctrl_area->exceptions.de = 1;
 194   ctrl_area->exceptions.df = 1;
 195   ctrl_area->exceptions.pf = 1;
 196   ctrl_area->exceptions.ts = 1;
 197   ctrl_area->exceptions.ss = 1;
 198   ctrl_area->exceptions.ac = 1;
 199   ctrl_area->exceptions.mc = 1;
 200   ctrl_area->exceptions.gp = 1;
 201   ctrl_area->exceptions.ud = 1;
 202   ctrl_area->exceptions.np = 1;
 203   ctrl_area->exceptions.of = 1;
 204   ctrl_area->exceptions.nmi = 1;
 205
 206   guest_state->cs.selector = 0x0000;
 207   guest_state->cs.limit=~0u;
 208   guest_state->cs.base = guest_state->cs.selector<<4;
 209   guest_state->cs.attrib.raw = 0xf3;
 210
 211
 212   struct vmcb_selector *segregs [] = {&(guest_state->ss), &(guest_state->ds), &(guest_state->es), &(guest_state->fs), &(guest_state->gs), NULL};
 213   for ( i = 0; segregs[i] != NULL; i++) {
 214     struct vmcb_selector * seg = segregs[i];
 215
 216     seg->selector = 0x0000;
 217     seg->base = seg->selector << 4;
 218     seg->attrib.raw = 0xf3;
 219     seg->limit = ~0u;
 220   }
 221
 222   if (vm_info.io_map.num_ports > 0) {
 223     vmm_io_hook_t * iter;
 224     addr_t io_port_bitmap;
 225
 226     io_port_bitmap = (addr_t)os_hooks->allocate_pages(3);
 227     memset((uchar_t*)io_port_bitmap, 0, PAGE_SIZE * 3);
 228
 229     ctrl_area->IOPM_BASE_PA = io_port_bitmap;
 230
 231     //PrintDebug("Setting up IO Map at 0x%x\n", io_port_bitmap);
 232
 233     FOREACH_IO_HOOK(vm_info.io_map, iter) {
 234       ushort_t port = iter->port;
 235       uchar_t * bitmap = (uchar_t *)io_port_bitmap;
 236
 237       bitmap += (port / 8);
 238       PrintDebug("Setting Bit in block %x\n", bitmap);
 239       *bitmap |= 1 << (port % 8);
 240     }
 241
 242
 243     //PrintDebugMemDump((uchar_t*)io_port_bitmap, PAGE_SIZE *2);
 244
 245     ctrl_area->instrs.IOIO_PROT = 1;
 246   }
 247
 248   ctrl_area->instrs.INTR = 1;
 249
 250
 251
 252   if (vm_info.page_mode == SHADOW_PAGING) {
 253     PrintDebug("Creating initial shadow page table\n");
 254     vm_info.shdw_pg_state.shadow_cr3.e_reg.low |= ((addr_t)create_passthrough_pde32_pts(&vm_info) & ~0xfff);
 255     PrintDebug("Created\n");
 256
 257     guest_state->cr3 = vm_info.shdw_pg_state.shadow_cr3.r_reg;
 258
 259     ctrl_area->cr_reads.cr3 = 1;
 260     ctrl_area->cr_writes.cr3 = 1;
 261
 262
 263     ctrl_area->instrs.INVLPG = 1;
 264     ctrl_area->instrs.INVLPGA = 1;
 265
 266     guest_state->g_pat = 0x7040600070406ULL;
 267
 268     guest_state->cr0 |= 0x80000000;
 269   } else if (vm_info.page_mode == NESTED_PAGING) {
 270     // Flush the TLB on entries/exits
 271     //ctrl_area->TLB_CONTROL = 1;
 272
 273     // Enable Nested Paging
 274     //ctrl_area->NP_ENABLE = 1;
 275
 276     //PrintDebug("NP_Enable at 0x%x\n", &(ctrl_area->NP_ENABLE));
 277
 278         // Set the Nested Page Table pointer
 279     //    ctrl_area->N_CR3 = ((addr_t)vm_info.page_tables);
 280     // ctrl_area->N_CR3 = (addr_t)(vm_info.page_tables);
 281
 282     //   ctrl_area->N_CR3 = Get_CR3();
 283     // guest_state->cr3 |= (Get_CR3() & 0xfffff000);
 284
 285     //    guest_state->g_pat = 0x7040600070406ULL;
 286   }
 287
 288
 289
 290 }
 291
 292
 293
 294 void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info vm_info) {
 295   vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
 296   vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA(vmcb);
 297   uint_t i;
 298
 299
 300   guest_state->rsp = vm_info.vm_regs.rsp;
 301   // guest_state->rip = vm_info.rip;
 302   guest_state->rip = 0xfff0;
 303
 304   //ctrl_area->instrs.instrs.CR0 = 1;
 305   ctrl_area->cr_reads.cr0 = 1;
 306   ctrl_area->cr_writes.cr0 = 1;
 307
 308   guest_state->efer |= EFER_MSR_svm_enable;
 309   guest_state->rflags = 0x00000002; // The reserved bit is always 1
 310   ctrl_area->svm_instrs.VMRUN = 1;
 311   // guest_state->cr0 = 0x00000001;    // PE
 312   ctrl_area->guest_ASID = 1;
 313
 314   ctrl_area->exceptions.de = 1;
 315   ctrl_area->exceptions.df = 1;
 316   ctrl_area->exceptions.pf = 1;
 317   ctrl_area->exceptions.ts = 1;
 318   ctrl_area->exceptions.ss = 1;
 319   ctrl_area->exceptions.ac = 1;
 320   ctrl_area->exceptions.mc = 1;
 321   ctrl_area->exceptions.gp = 1;
 322   ctrl_area->exceptions.ud = 1;
 323   ctrl_area->exceptions.np = 1;
 324   ctrl_area->exceptions.of = 1;
 325   ctrl_area->exceptions.nmi = 1;
 326
 327   vm_info.vm_regs.rdx = 0x00000f00;
 328
 329   guest_state->cr0 = 0x60000010;
 330
 331   guest_state->cs.selector = 0xf000;
 332   guest_state->cs.limit=0xffff;
 333   guest_state->cs.base = 0x0000000f0000LL;
 334   guest_state->cs.attrib.raw = 0xf3;
 335
 336
 337   struct vmcb_selector *segregs [] = {&(guest_state->ss), &(guest_state->ds), &(guest_state->es), &(guest_state->fs), &(guest_state->gs), NULL};
 338   for ( i = 0; segregs[i] != NULL; i++) {
 339     struct vmcb_selector * seg = segregs[i];
 340
 341     seg->selector = 0x0000;
 342     //    seg->base = seg->selector << 4;
 343     seg->base = 0x00000000;
 344     seg->attrib.raw = 0xf3;
 345     seg->limit = ~0u;
 346   }
 347
 348   guest_state->gdtr.limit = 0x0000ffff;
 349   guest_state->gdtr.base = 0x0000000000000000LL;
 350   guest_state->idtr.limit = 0x0000ffff;
 351   guest_state->idtr.base = 0x0000000000000000LL;
 352
 353   guest_state->ldtr.selector = 0x0000;
 354   guest_state->ldtr.limit = 0x0000ffff;
 355   guest_state->ldtr.base = 0x0000000000000000LL;
 356   guest_state->tr.selector = 0x0000;
 357   guest_state->tr.limit = 0x0000ffff;
 358   guest_state->tr.base = 0x0000000000000000LL;
 359
 360
 361   guest_state->dr6 = 0x00000000ffff0ff0LL;
 362   guest_state->dr7 = 0x0000000000000400LL;
 363
 364   if (vm_info.io_map.num_ports > 0) {
 365     vmm_io_hook_t * iter;
 366     addr_t io_port_bitmap;
 367
 368     io_port_bitmap = (addr_t)os_hooks->allocate_pages(3);
 369     memset((uchar_t*)io_port_bitmap, 0, PAGE_SIZE * 3);
 370
 371     ctrl_area->IOPM_BASE_PA = io_port_bitmap;
 372
 373     //PrintDebug("Setting up IO Map at 0x%x\n", io_port_bitmap);
 374
 375     FOREACH_IO_HOOK(vm_info.io_map, iter) {
 376       ushort_t port = iter->port;
 377       uchar_t * bitmap = (uchar_t *)io_port_bitmap;
 378
 379       bitmap += (port / 8);
 380       PrintDebug("Setting Bit in block %x\n", bitmap);
 381       *bitmap |= 1 << (port % 8);
 382     }
 383
 384
 385     //PrintDebugMemDump((uchar_t*)io_port_bitmap, PAGE_SIZE *2);
 386
 387     ctrl_area->instrs.IOIO_PROT = 1;
 388   }
 389
 390   //ctrl_area->instrs.instrs.INTR = 1;
 391
 392
 393
 394   if (vm_info.page_mode == SHADOW_PAGING) {
 395     PrintDebug("Creating initial shadow page table\n");
 396     vm_info.shdw_pg_state.shadow_cr3.e_reg.low |= ((addr_t)create_passthrough_pde32_pts(&vm_info) & ~0xfff);
 397     PrintDebug("Created\n");
 398
 399     guest_state->cr3 = vm_info.shdw_pg_state.shadow_cr3.r_reg;
 400
 401     //PrintDebugPageTables((pde32_t*)(vm_info.shdw_pg_state.shadow_cr3.e_reg.low));
 402
 403     ctrl_area->cr_reads.cr3 = 1;
 404     ctrl_area->cr_writes.cr3 = 1;
 405
 406
 407     ctrl_area->instrs.INVLPG = 1;
 408     ctrl_area->instrs.INVLPGA = 1;
 409
 410     guest_state->g_pat = 0x7040600070406ULL;
 411
 412     guest_state->cr0 |= 0x80000000;
 413   } else if (vm_info.page_mode == NESTED_PAGING) {
 414     // Flush the TLB on entries/exits
 415     //ctrl_area->TLB_CONTROL = 1;
 416
 417     // Enable Nested Paging
 418     //ctrl_area->NP_ENABLE = 1;
 419
 420     //PrintDebug("NP_Enable at 0x%x\n", &(ctrl_area->NP_ENABLE));
 421
 422         // Set the Nested Page Table pointer
 423     //    ctrl_area->N_CR3 = ((addr_t)vm_info.page_tables);
 424     // ctrl_area->N_CR3 = (addr_t)(vm_info.page_tables);
 425
 426     //   ctrl_area->N_CR3 = Get_CR3();
 427     // guest_state->cr3 |= (Get_CR3() & 0xfffff000);
 428
 429     //    guest_state->g_pat = 0x7040600070406ULL;
 430   }
 431
 432
 433
 434 }
 435
 436
 437 void Init_VMCB_pe(vmcb_t *vmcb, struct guest_info vm_info) {
 438   vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
 439   vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA(vmcb);
 440   uint_t i = 0;
 441
 442
 443   guest_state->rsp = vm_info.vm_regs.rsp;
 444   guest_state->rip = vm_info.rip;
 445
 446
 447   /* I pretty much just gutted this from TVMM */
 448   /* Note: That means its probably wrong */
 449
 450   // set the segment registers to mirror ours
 451   guest_state->cs.selector = 1<<3;
 452   guest_state->cs.attrib.fields.type = 0xa; // Code segment+read
 453   guest_state->cs.attrib.fields.S = 1;
 454   guest_state->cs.attrib.fields.P = 1;
 455   guest_state->cs.attrib.fields.db = 1;
 456   guest_state->cs.attrib.fields.G = 1;
 457   guest_state->cs.limit = 0xfffff;
 458   guest_state->cs.base = 0;
 459
 460   struct vmcb_selector *segregs [] = {&(guest_state->ss), &(guest_state->ds), &(guest_state->es), &(guest_state->fs), &(guest_state->gs), NULL};
 461   for ( i = 0; segregs[i] != NULL; i++) {
 462     struct vmcb_selector * seg = segregs[i];
 463
 464     seg->selector = 2<<3;
 465     seg->attrib.fields.type = 0x2; // Data Segment+read/write
 466     seg->attrib.fields.S = 1;
 467     seg->attrib.fields.P = 1;
 468     seg->attrib.fields.db = 1;
 469     seg->attrib.fields.G = 1;
 470     seg->limit = 0xfffff;
 471     seg->base = 0;
 472   }
 473
 474
 475   {
 476     /* JRL THIS HAS TO GO */
 477
 478     //    guest_state->tr.selector = GetTR_Selector();
 479     guest_state->tr.attrib.fields.type = 0x9;
 480     guest_state->tr.attrib.fields.P = 1;
 481     // guest_state->tr.limit = GetTR_Limit();
 482     //guest_state->tr.base = GetTR_Base();// - 0x2000;
 483     /* ** */
 484   }
 485
 486
 487   /* ** */
 488
 489
 490   guest_state->efer |= EFER_MSR_svm_enable;
 491   guest_state->rflags = 0x00000002; // The reserved bit is always 1
 492   ctrl_area->svm_instrs.VMRUN = 1;
 493   guest_state->cr0 = 0x00000001;    // PE
 494   ctrl_area->guest_ASID = 1;
 495
 496
 497   //  guest_state->cpl = 0;
 498
 499
 500
 501   // Setup exits
 502
 503   ctrl_area->cr_writes.cr4 = 1;
 504
 505   ctrl_area->exceptions.de = 1;
 506   ctrl_area->exceptions.df = 1;
 507   ctrl_area->exceptions.pf = 1;
 508   ctrl_area->exceptions.ts = 1;
 509   ctrl_area->exceptions.ss = 1;
 510   ctrl_area->exceptions.ac = 1;
 511   ctrl_area->exceptions.mc = 1;
 512   ctrl_area->exceptions.gp = 1;
 513   ctrl_area->exceptions.ud = 1;
 514   ctrl_area->exceptions.np = 1;
 515   ctrl_area->exceptions.of = 1;
 516   ctrl_area->exceptions.nmi = 1;
 517
 518
 519
 520   ctrl_area->instrs.IOIO_PROT = 1;
 521   ctrl_area->IOPM_BASE_PA = (uint_t)os_hooks->allocate_pages(3);
 522
 523   {
 524     reg_ex_t tmp_reg;
 525     tmp_reg.r_reg = ctrl_area->IOPM_BASE_PA;
 526     memset((void*)(tmp_reg.e_reg.low), 0xffffffff, PAGE_SIZE * 2);
 527   }
 528
 529   ctrl_area->instrs.INTR = 1;
 530
 531
 532   {
 533     char gdt_buf[6];
 534     char idt_buf[6];
 535
 536     memset(gdt_buf, 0, 6);
 537     memset(idt_buf, 0, 6);
 538
 539
 540     uint_t gdt_base, idt_base;
 541     ushort_t gdt_limit, idt_limit;
 542
 543     GetGDTR(gdt_buf);
 544     gdt_base = *(ulong_t*)((uchar_t*)gdt_buf + 2) & 0xffffffff;
 545     gdt_limit = *(ushort_t*)(gdt_buf) & 0xffff;
 546     PrintDebug("GDT: base: %x, limit: %x\n", gdt_base, gdt_limit);
 547
 548     GetIDTR(idt_buf);
 549     idt_base = *(ulong_t*)(idt_buf + 2) & 0xffffffff;
 550     idt_limit = *(ushort_t*)(idt_buf) & 0xffff;
 551     PrintDebug("IDT: base: %x, limit: %x\n",idt_base, idt_limit);
 552
 553
 554     // gdt_base -= 0x2000;
 555     //idt_base -= 0x2000;
 556
 557     guest_state->gdtr.base = gdt_base;
 558     guest_state->gdtr.limit = gdt_limit;
 559     guest_state->idtr.base = idt_base;
 560     guest_state->idtr.limit = idt_limit;
 561
 562
 563   }
 564
 565
 566   // also determine if CPU supports nested paging
 567   /*
 568   if (vm_info.page_tables) {
 569     //   if (0) {
 570     // Flush the TLB on entries/exits
 571     ctrl_area->TLB_CONTROL = 1;
 572
 573     // Enable Nested Paging
 574     ctrl_area->NP_ENABLE = 1;
 575
 576     PrintDebug("NP_Enable at 0x%x\n", &(ctrl_area->NP_ENABLE));
 577
 578         // Set the Nested Page Table pointer
 579     ctrl_area->N_CR3 |= ((addr_t)vm_info.page_tables & 0xfffff000);
 580
 581
 582     //   ctrl_area->N_CR3 = Get_CR3();
 583     // guest_state->cr3 |= (Get_CR3() & 0xfffff000);
 584
 585     guest_state->g_pat = 0x7040600070406ULL;
 586
 587     PrintDebug("Set Nested CR3: lo: 0x%x  hi: 0x%x\n", (uint_t)*(&(ctrl_area->N_CR3)), (uint_t)*((unsigned char *)&(ctrl_area->N_CR3) + 4));
 588     PrintDebug("Set Guest CR3: lo: 0x%x  hi: 0x%x\n", (uint_t)*(&(guest_state->cr3)), (uint_t)*((unsigned char *)&(guest_state->cr3) + 4));
 589     // Enable Paging
 590     //    guest_state->cr0 |= 0x80000000;
 591   }
 592   */
 593
 594 }
 595
 596
 597
 598
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 613
 614
 615 /*
 616
 617
 618 void Init_VMCB_Real(vmcb_t * vmcb, struct guest_info vm_info) {
 619   vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
 620   vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA(vmcb);
 621   uint_t i;
 622
 623
 624   guest_state->rsp = vm_info.vm_regs.rsp;
 625   guest_state->rip = vm_info.rip;
 626
 627
 628   guest_state->efer |= EFER_MSR_svm_enable;
 629   guest_state->rflags = 0x00000002; // The reserved bit is always 1
 630   ctrl_area->svm_instrs.instrs.VMRUN = 1;
 631   ctrl_area->guest_ASID = 1;
 632   guest_state->cr0 = 0x60000010;
 633
 634
 635   ctrl_area->exceptions.de = 1;
 636   ctrl_area->exceptions.df = 1;
 637   ctrl_area->exceptions.pf = 1;
 638   ctrl_area->exceptions.ts = 1;
 639   ctrl_area->exceptions.ss = 1;
 640   ctrl_area->exceptions.ac = 1;
 641   ctrl_area->exceptions.mc = 1;
 642   ctrl_area->exceptions.gp = 1;
 643   ctrl_area->exceptions.ud = 1;
 644   ctrl_area->exceptions.np = 1;
 645   ctrl_area->exceptions.of = 1;
 646   ctrl_area->exceptions.nmi = 1;
 647
 648   guest_state->cs.selector = 0xf000;
 649   guest_state->cs.limit=0xffff;
 650   guest_state->cs.base =  0xffff0000;
 651   guest_state->cs.attrib.raw = 0x9a;
 652
 653
 654   struct vmcb_selector *segregs [] = {&(guest_state->ss), &(guest_state->ds), &(guest_state->es), &(guest_state->fs), &(guest_state->gs), NULL};
 655   for ( i = 0; segregs[i] != NULL; i++) {
 656     struct vmcb_selector * seg = segregs[i];
 657
 658     seg->selector = 0x0000;
 659     seg->base = 0xffff0000;
 660     seg->attrib.raw = 0x9b;
 661     seg->limit = 0xffff;
 662   }
 663
 664   // Set GPRs
 665   //
 666   //  EDX == 0xfxx
 667   //  EAX, EBX, ECX, ESI, EDI, EBP, ESP == 0x0
 668   //
 669
 670   guest_state->gdtr.base = 0;
 671   guest_state->gdtr.limit = 0xffff;
 672   guest_state->gdtr.attrib.raw = 0x0;
 673
 674   guest_state->idtr.base = 0;
 675   guest_state->idtr.limit = 0xffff;
 676   guest_state->idtr.attrib.raw = 0x0;
 677
 678   guest_state->ldtr.base = 0;
 679   guest_state->ldtr.limit = 0xffff;
 680   guest_state->ldtr.attrib.raw = 0x82;
 681
 682   guest_state->tr.base = 0;
 683   guest_state->tr.limit = 0xffff;
 684   guest_state->tr.attrib.raw = 0x83;
 685
 686
 687
 688
 689   if (vm_info.io_map.num_ports > 0) {
 690     vmm_io_hook_t * iter;
 691     addr_t io_port_bitmap;
 692
 693     io_port_bitmap = (addr_t)os_hooks->allocate_pages(3);
 694     memset((uchar_t*)io_port_bitmap, 0, PAGE_SIZE * 3);
 695
 696     ctrl_area->IOPM_BASE_PA = io_port_bitmap;
 697
 698     //PrintDebug("Setting up IO Map at 0x%x\n", io_port_bitmap);
 699
 700     FOREACH_IO_HOOK(vm_info.io_map, iter) {
 701       ushort_t port = iter->port;
 702       uchar_t * bitmap = (uchar_t *)io_port_bitmap;
 703
 704       bitmap += (port / 8);
 705       PrintDebug("Setting Bit in block %x\n", bitmap);
 706       *bitmap |= 1 << (port % 8);
 707     }
 708
 709     ctrl_area->instrs.instrs.IOIO_PROT = 1;
 710   }
 711
 712   ctrl_area->instrs.instrs.INTR = 1;
 713
 714   // also determine if CPU supports nested paging
 715
 716   if (vm_info.page_mode == SHADOW_PAGING) {
 717     PrintDebug("Creating initial shadow page table\n");
 718     vm_info.shdw_pg_state.shadow_cr3.e_reg.low |= ((addr_t)create_passthrough_pde32_pts(&vm_info) & ~0xfff);
 719     PrintDebug("Created\n");
 720
 721     guest_state->cr3 = vm_info.shdw_pg_state.shadow_cr3.r_reg;
 722
 723     ctrl_area->cr_reads.crs.cr3 = 1;
 724     ctrl_area->cr_writes.crs.cr3 = 1;
 725     ctrl_area->cr_reads.crs.cr0 = 1;
 726     ctrl_area->cr_writes.crs.cr0 = 1;
 727
 728     ctrl_area->instrs.instrs.INVLPG = 1;
 729     ctrl_area->instrs.instrs.INVLPGA = 1;
 730
 731
 732     guest_state->g_pat = 0x7040600070406ULL;
 733
 734     vm_info.shdw_pg_state.guest_cr0.e_reg.low = guest_state->cr0;
 735     guest_state->cr0 |= 0x80000000;
 736   } else if (vm_info.page_mode == NESTED_PAGING) {
 737     // Flush the TLB on entries/exits
 738     //ctrl_area->TLB_CONTROL = 1;
 739
 740     // Enable Nested Paging
 741     //ctrl_area->NP_ENABLE = 1;
 742
 743     //PrintDebug("NP_Enable at 0x%x\n", &(ctrl_area->NP_ENABLE));
 744
 745         // Set the Nested Page Table pointer
 746     //    ctrl_area->N_CR3 = ((addr_t)vm_info.page_tables);
 747     // ctrl_area->N_CR3 = (addr_t)(vm_info.page_tables);
 748
 749     //   ctrl_area->N_CR3 = Get_CR3();
 750     // guest_state->cr3 |= (Get_CR3() & 0xfffff000);
 751
 752     //    guest_state->g_pat = 0x7040600070406ULL;
 753   }
 754
 755 }
 756 */