palacios/src/palacios/vmx.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) 2011, Jack Lange <jarusl@cs.northwestern.edu>
  11  * Copyright (c) 2011, 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
  21 #include <palacios/vmx.h>
  22 #include <palacios/vmm.h>
  23 #include <palacios/vmx_handler.h>
  24 #include <palacios/vmcs.h>
  25 #include <palacios/vmx_lowlevel.h>
  26 #include <palacios/vmm_lowlevel.h>
  27 #include <palacios/vmm_ctrl_regs.h>
  28 #include <palacios/vmm_config.h>
  29 #include <palacios/vmm_time.h>
  30 #include <palacios/vm_guest_mem.h>
  31 #include <palacios/vmm_direct_paging.h>
  32 #include <palacios/vmx_io.h>
  33 #include <palacios/vmx_msr.h>
  34 #include <palacios/vmm_decoder.h>
  35 #include <palacios/vmm_barrier.h>
  36
  37 #ifdef V3_CONFIG_CHECKPOINT
  38 #include <palacios/vmm_checkpoint.h>
  39 #endif
  40
  41 #include <palacios/vmx_ept.h>
  42 #include <palacios/vmx_assist.h>
  43 #include <palacios/vmx_hw_info.h>
  44
  45 #ifndef V3_CONFIG_DEBUG_VMX
  46 #undef PrintDebug
  47 #define PrintDebug(fmt, args...)
  48 #endif
  49
  50
  51 /* These fields contain the hardware feature sets supported by the local CPU */
  52 static struct vmx_hw_info hw_info;
  53
  54 extern v3_cpu_arch_t v3_cpu_types[];
  55
  56 static addr_t host_vmcs_ptrs[V3_CONFIG_MAX_CPUS] = { [0 ... V3_CONFIG_MAX_CPUS - 1] = 0};
  57
  58 extern int v3_vmx_launch(struct v3_gprs * vm_regs, struct guest_info * info, struct v3_ctrl_regs * ctrl_regs);
  59 extern int v3_vmx_resume(struct v3_gprs * vm_regs, struct guest_info * info, struct v3_ctrl_regs * ctrl_regs);
  60
  61 static int inline check_vmcs_write(vmcs_field_t field, addr_t val) {
  62     int ret = 0;
  63
  64     ret = vmcs_write(field, val);
  65
  66     if (ret != VMX_SUCCESS) {
  67         PrintError("VMWRITE error on %s!: %d\n", v3_vmcs_field_to_str(field), ret);
  68         return 1;
  69     }
  70
  71
  72
  73
  74     return 0;
  75 }
  76
  77 static int inline check_vmcs_read(vmcs_field_t field, void * val) {
  78     int ret = 0;
  79
  80     ret = vmcs_read(field, val);
  81
  82     if (ret != VMX_SUCCESS) {
  83         PrintError("VMREAD error on %s!: %d\n", v3_vmcs_field_to_str(field), ret);
  84     }
  85
  86     return ret;
  87 }
  88
  89
  90
  91
  92 static addr_t allocate_vmcs() {
  93     struct vmcs_data * vmcs_page = NULL;
  94
  95     PrintDebug("Allocating page\n");
  96
  97     vmcs_page = (struct vmcs_data *)V3_VAddr(V3_AllocPages(1));
  98     memset(vmcs_page, 0, 4096);
  99
 100     vmcs_page->revision = hw_info.basic_info.revision;
 101     PrintDebug("VMX Revision: 0x%x\n", vmcs_page->revision);
 102
 103     return (addr_t)V3_PAddr((void *)vmcs_page);
 104 }
 105
 106 /*
 107
 108 static int debug_efer_read(struct guest_info * core, uint_t msr, struct v3_msr * src, void * priv_data) {
 109     struct v3_msr * efer = (struct v3_msr *)&(core->ctrl_regs.efer);
 110     V3_Print("\n\nEFER READ\n");
 111
 112     v3_print_guest_state(core);
 113
 114     src->value = efer->value;
 115     return 0;
 116 }
 117
 118 static int debug_efer_write(struct guest_info * core, uint_t msr, struct v3_msr src, void * priv_data) {
 119     struct v3_msr * efer = (struct v3_msr *)&(core->ctrl_regs.efer);
 120     V3_Print("\n\nEFER WRITE\n");
 121
 122     v3_print_guest_state(core);
 123
 124     efer->value = src.value;
 125
 126     {
 127         struct vmx_data * vmx_state = core->vmm_data;
 128
 129         V3_Print("Trapping page faults and GPFs\n");
 130         vmx_state->excp_bmap.pf = 1;
 131         vmx_state->excp_bmap.gp = 1;
 132
 133          check_vmcs_write(VMCS_EXCP_BITMAP, vmx_state->excp_bmap.value);
 134     }
 135
 136     return 0;
 137 }
 138 */
 139
 140
 141 static int init_vmcs_bios(struct guest_info * core, struct vmx_data * vmx_state) {
 142     int vmx_ret = 0;
 143
 144     // disable global interrupts for vm state initialization
 145     v3_disable_ints();
 146
 147     PrintDebug("Loading VMCS\n");
 148     vmx_ret = vmcs_load(vmx_state->vmcs_ptr_phys);
 149     vmx_state->state = VMX_UNLAUNCHED;
 150
 151     if (vmx_ret != VMX_SUCCESS) {
 152         PrintError("VMPTRLD failed\n");
 153         return -1;
 154     }
 155
 156
 157     /*** Setup default state from HW ***/
 158
 159     vmx_state->pin_ctrls.value = hw_info.pin_ctrls.def_val;
 160     vmx_state->pri_proc_ctrls.value = hw_info.proc_ctrls.def_val;
 161     vmx_state->exit_ctrls.value = hw_info.exit_ctrls.def_val;
 162     vmx_state->entry_ctrls.value = hw_info.entry_ctrls.def_val;
 163     vmx_state->sec_proc_ctrls.value = hw_info.sec_proc_ctrls.def_val;
 164
 165     /* Print Control MSRs */
 166     PrintDebug("CR0 MSR: %p\n", (void *)(addr_t)hw_info.cr0.value);
 167     PrintDebug("CR4 MSR: %p\n", (void *)(addr_t)hw_info.cr4.value);
 168
 169
 170
 171     /******* Setup Host State **********/
 172
 173     /* Cache GDTR, IDTR, and TR in host struct */
 174
 175
 176     /********** Setup VMX Control Fields ***********/
 177
 178     /* Add external interrupts, NMI exiting, and virtual NMI */
 179     vmx_state->pin_ctrls.nmi_exit = 1;
 180     vmx_state->pin_ctrls.ext_int_exit = 1;
 181
 182
 183     vmx_state->pri_proc_ctrls.hlt_exit = 1;
 184
 185
 186     vmx_state->pri_proc_ctrls.pause_exit = 0;
 187     vmx_state->pri_proc_ctrls.tsc_offset = 1;
 188 #ifdef V3_CONFIG_TIME_VIRTUALIZE_TSC
 189     vmx_state->pri_proc_ctrls.rdtsc_exit = 1;
 190 #endif
 191
 192     /* Setup IO map */
 193     vmx_state->pri_proc_ctrls.use_io_bitmap = 1;
 194     vmx_ret |= check_vmcs_write(VMCS_IO_BITMAP_A_ADDR, (addr_t)V3_PAddr(core->vm_info->io_map.arch_data));
 195     vmx_ret |= check_vmcs_write(VMCS_IO_BITMAP_B_ADDR,
 196             (addr_t)V3_PAddr(core->vm_info->io_map.arch_data) + PAGE_SIZE_4KB);
 197
 198
 199     vmx_state->pri_proc_ctrls.use_msr_bitmap = 1;
 200     vmx_ret |= check_vmcs_write(VMCS_MSR_BITMAP, (addr_t)V3_PAddr(core->vm_info->msr_map.arch_data));
 201
 202
 203
 204 #ifdef __V3_64BIT__
 205     // Ensure host runs in 64-bit mode at each VM EXIT
 206     vmx_state->exit_ctrls.host_64_on = 1;
 207 #endif
 208
 209
 210
 211     // Restore host's EFER register on each VM EXIT
 212     vmx_state->exit_ctrls.ld_efer = 1;
 213
 214     // Save/restore guest's EFER register to/from VMCS on VM EXIT/ENTRY
 215     vmx_state->exit_ctrls.save_efer = 1;
 216     vmx_state->entry_ctrls.ld_efer  = 1;
 217
 218     vmx_state->exit_ctrls.save_pat = 1;
 219     vmx_state->exit_ctrls.ld_pat = 1;
 220     vmx_state->entry_ctrls.ld_pat = 1;
 221
 222     /* Temporary GPF trap */
 223     vmx_state->excp_bmap.gp = 1;
 224
 225     // Setup Guests initial PAT field
 226     vmx_ret |= check_vmcs_write(VMCS_GUEST_PAT, 0x0007040600070406LL);
 227
 228     /* Setup paging */
 229     if (core->shdw_pg_mode == SHADOW_PAGING) {
 230         PrintDebug("Creating initial shadow page table\n");
 231
 232         if (v3_init_passthrough_pts(core) == -1) {
 233             PrintError("Could not initialize passthrough page tables\n");
 234             return -1;
 235         }
 236
 237 #define CR0_PE 0x00000001
 238 #define CR0_PG 0x80000000
 239 #define CR0_WP 0x00010000 // To ensure mem hooks work
 240         vmx_ret |= check_vmcs_write(VMCS_CR0_MASK, (CR0_PE | CR0_PG | CR0_WP));
 241
 242
 243         // Cause VM_EXIT whenever CR4.VMXE or CR4.PAE bits are written
 244         vmx_ret |= check_vmcs_write(VMCS_CR4_MASK, CR4_VMXE | CR4_PAE);
 245
 246         core->ctrl_regs.cr3 = core->direct_map_pt;
 247
 248         // vmx_state->pinbased_ctrls |= NMI_EXIT;
 249
 250         /* Add CR exits */
 251         vmx_state->pri_proc_ctrls.cr3_ld_exit = 1;
 252         vmx_state->pri_proc_ctrls.cr3_str_exit = 1;
 253
 254         vmx_state->pri_proc_ctrls.invlpg_exit = 1;
 255
 256         /* Add page fault exits */
 257         vmx_state->excp_bmap.pf = 1;
 258
 259         // Setup VMX Assist
 260         v3_vmxassist_init(core, vmx_state);
 261
 262         // Hook all accesses to EFER register
 263         v3_hook_msr(core->vm_info, EFER_MSR,
 264                     &v3_handle_efer_read,
 265                     &v3_handle_efer_write,
 266                     core);
 267
 268     } else if ((core->shdw_pg_mode == NESTED_PAGING) &&
 269                (v3_cpu_types[core->pcpu_id] == V3_VMX_EPT_CPU)) {
 270
 271 #define CR0_PE 0x00000001
 272 #define CR0_PG 0x80000000
 273 #define CR0_WP 0x00010000 // To ensure mem hooks work
 274         vmx_ret |= check_vmcs_write(VMCS_CR0_MASK, (CR0_PE | CR0_PG | CR0_WP));
 275
 276         // vmx_state->pinbased_ctrls |= NMI_EXIT;
 277
 278         // Cause VM_EXIT whenever CR4.VMXE or CR4.PAE bits are written
 279         vmx_ret |= check_vmcs_write(VMCS_CR4_MASK, CR4_VMXE | CR4_PAE);
 280
 281         /* Disable CR exits */
 282         vmx_state->pri_proc_ctrls.cr3_ld_exit = 0;
 283         vmx_state->pri_proc_ctrls.cr3_str_exit = 0;
 284
 285         vmx_state->pri_proc_ctrls.invlpg_exit = 0;
 286
 287         /* Add page fault exits */
 288         //      vmx_state->excp_bmap.pf = 1; // This should never happen..., enabled to catch bugs
 289
 290         // Setup VMX Assist
 291         v3_vmxassist_init(core, vmx_state);
 292
 293         /* Enable EPT */
 294         vmx_state->pri_proc_ctrls.sec_ctrls = 1; // Enable secondary proc controls
 295         vmx_state->sec_proc_ctrls.enable_ept = 1; // enable EPT paging
 296
 297
 298
 299         if (v3_init_ept(core, &hw_info) == -1) {
 300             PrintError("Error initializing EPT\n");
 301             return -1;
 302         }
 303
 304         // Hook all accesses to EFER register
 305         v3_hook_msr(core->vm_info, EFER_MSR, NULL, NULL, NULL);
 306
 307     } else if ((core->shdw_pg_mode == NESTED_PAGING) &&
 308                (v3_cpu_types[core->pcpu_id] == V3_VMX_EPT_UG_CPU)) {
 309         int i = 0;
 310         // For now we will assume that unrestricted guest mode is assured w/ EPT
 311
 312
 313         core->vm_regs.rsp = 0x00;
 314         core->rip = 0xfff0;
 315         core->vm_regs.rdx = 0x00000f00;
 316         core->ctrl_regs.rflags = 0x00000002; // The reserved bit is always 1
 317         core->ctrl_regs.cr0 = 0x00000030;
 318         core->ctrl_regs.cr4 = 0x00002010; // Enable VMX and PSE flag
 319
 320
 321         core->segments.cs.selector = 0xf000;
 322         core->segments.cs.limit = 0xffff;
 323         core->segments.cs.base = 0x0000000f0000LL;
 324
 325         // (raw attributes = 0xf3)
 326         core->segments.cs.type = 0xb;
 327         core->segments.cs.system = 0x1;
 328         core->segments.cs.dpl = 0x0;
 329         core->segments.cs.present = 1;
 330
 331
 332
 333         struct v3_segment * segregs [] = {&(core->segments.ss), &(core->segments.ds),
 334                                           &(core->segments.es), &(core->segments.fs),
 335                                           &(core->segments.gs), NULL};
 336
 337         for ( i = 0; segregs[i] != NULL; i++) {
 338             struct v3_segment * seg = segregs[i];
 339
 340             seg->selector = 0x0000;
 341             //    seg->base = seg->selector << 4;
 342             seg->base = 0x00000000;
 343             seg->limit = 0xffff;
 344
 345
 346             seg->type = 0x3;
 347             seg->system = 0x1;
 348             seg->dpl = 0x0;
 349             seg->present = 1;
 350             //    seg->granularity = 1;
 351
 352         }
 353
 354
 355         core->segments.gdtr.limit = 0x0000ffff;
 356         core->segments.gdtr.base = 0x0000000000000000LL;
 357
 358         core->segments.idtr.limit = 0x0000ffff;
 359         core->segments.idtr.base = 0x0000000000000000LL;
 360
 361         core->segments.ldtr.selector = 0x0000;
 362         core->segments.ldtr.limit = 0x0000ffff;
 363         core->segments.ldtr.base = 0x0000000000000000LL;
 364         core->segments.ldtr.type = 0x2;
 365         core->segments.ldtr.present = 1;
 366
 367         core->segments.tr.selector = 0x0000;
 368         core->segments.tr.limit = 0x0000ffff;
 369         core->segments.tr.base = 0x0000000000000000LL;
 370         core->segments.tr.type = 0xb;
 371         core->segments.tr.present = 1;
 372
 373         //      core->dbg_regs.dr6 = 0x00000000ffff0ff0LL;
 374         core->dbg_regs.dr7 = 0x0000000000000400LL;
 375
 376         /* Enable EPT */
 377         vmx_state->pri_proc_ctrls.sec_ctrls = 1; // Enable secondary proc controls
 378         vmx_state->sec_proc_ctrls.enable_ept = 1; // enable EPT paging
 379         vmx_state->sec_proc_ctrls.unrstrct_guest = 1; // enable unrestricted guest operation
 380
 381
 382         /* Disable shadow paging stuff */
 383         vmx_state->pri_proc_ctrls.cr3_ld_exit = 0;
 384         vmx_state->pri_proc_ctrls.cr3_str_exit = 0;
 385
 386         vmx_state->pri_proc_ctrls.invlpg_exit = 0;
 387
 388
 389         // Cause VM_EXIT whenever the CR4.VMXE bit is set
 390         vmx_ret |= check_vmcs_write(VMCS_CR4_MASK, CR4_VMXE);
 391
 392
 393         if (v3_init_ept(core, &hw_info) == -1) {
 394             PrintError("Error initializing EPT\n");
 395             return -1;
 396         }
 397
 398         // Hook all accesses to EFER register
 399         //v3_hook_msr(core->vm_info, EFER_MSR, &debug_efer_read, &debug_efer_write, core);
 400         v3_hook_msr(core->vm_info, EFER_MSR, NULL, NULL, NULL);
 401     } else {
 402         PrintError("Invalid Virtual paging mode\n");
 403         return -1;
 404     }
 405
 406
 407     // hook vmx msrs
 408
 409     // Setup SYSCALL/SYSENTER MSRs in load/store area
 410
 411     // save STAR, LSTAR, FMASK, KERNEL_GS_BASE MSRs in MSR load/store area
 412     {
 413
 414         struct vmcs_msr_save_area * msr_entries = NULL;
 415         int max_msrs = (hw_info.misc_info.max_msr_cache_size + 1) * 4;
 416         int msr_ret = 0;
 417
 418         V3_Print("Setting up MSR load/store areas (max_msr_count=%d)\n", max_msrs);
 419
 420         if (max_msrs < 4) {
 421             PrintError("Max MSR cache size is too small (%d)\n", max_msrs);
 422             return -1;
 423         }
 424
 425         vmx_state->msr_area_paddr = (addr_t)V3_AllocPages(1);
 426
 427         if (vmx_state->msr_area_paddr == (addr_t)NULL) {
 428             PrintError("could not allocate msr load/store area\n");
 429             return -1;
 430         }
 431
 432         msr_entries = (struct vmcs_msr_save_area *)V3_VAddr((void *)(vmx_state->msr_area_paddr));
 433         vmx_state->msr_area = msr_entries; // cache in vmx_info
 434
 435         memset(msr_entries, 0, PAGE_SIZE);
 436
 437         msr_entries->guest_star.index = IA32_STAR_MSR;
 438         msr_entries->guest_lstar.index = IA32_LSTAR_MSR;
 439         msr_entries->guest_fmask.index = IA32_FMASK_MSR;
 440         msr_entries->guest_kern_gs.index = IA32_KERN_GS_BASE_MSR;
 441
 442         msr_entries->host_star.index = IA32_STAR_MSR;
 443         msr_entries->host_lstar.index = IA32_LSTAR_MSR;
 444         msr_entries->host_fmask.index = IA32_FMASK_MSR;
 445         msr_entries->host_kern_gs.index = IA32_KERN_GS_BASE_MSR;
 446
 447         msr_ret |= check_vmcs_write(VMCS_EXIT_MSR_STORE_CNT, 4);
 448         msr_ret |= check_vmcs_write(VMCS_EXIT_MSR_LOAD_CNT, 4);
 449         msr_ret |= check_vmcs_write(VMCS_ENTRY_MSR_LOAD_CNT, 4);
 450
 451         msr_ret |= check_vmcs_write(VMCS_EXIT_MSR_STORE_ADDR, (addr_t)V3_PAddr(msr_entries->guest_msrs));
 452         msr_ret |= check_vmcs_write(VMCS_ENTRY_MSR_LOAD_ADDR, (addr_t)V3_PAddr(msr_entries->guest_msrs));
 453         msr_ret |= check_vmcs_write(VMCS_EXIT_MSR_LOAD_ADDR, (addr_t)V3_PAddr(msr_entries->host_msrs));
 454
 455
 456         msr_ret |= v3_hook_msr(core->vm_info, IA32_STAR_MSR, NULL, NULL, NULL);
 457         msr_ret |= v3_hook_msr(core->vm_info, IA32_LSTAR_MSR, NULL, NULL, NULL);
 458         msr_ret |= v3_hook_msr(core->vm_info, IA32_FMASK_MSR, NULL, NULL, NULL);
 459         msr_ret |= v3_hook_msr(core->vm_info, IA32_KERN_GS_BASE_MSR, NULL, NULL, NULL);
 460
 461
 462         // IMPORTANT: These MSRs appear to be cached by the hardware....
 463         msr_ret |= v3_hook_msr(core->vm_info, SYSENTER_CS_MSR, NULL, NULL, NULL);
 464         msr_ret |= v3_hook_msr(core->vm_info, SYSENTER_ESP_MSR, NULL, NULL, NULL);
 465         msr_ret |= v3_hook_msr(core->vm_info, SYSENTER_EIP_MSR, NULL, NULL, NULL);
 466
 467         msr_ret |= v3_hook_msr(core->vm_info, FS_BASE_MSR, NULL, NULL, NULL);
 468         msr_ret |= v3_hook_msr(core->vm_info, GS_BASE_MSR, NULL, NULL, NULL);
 469
 470         msr_ret |= v3_hook_msr(core->vm_info, IA32_PAT_MSR, NULL, NULL, NULL);
 471
 472         // Not sure what to do about this... Does not appear to be an explicit hardware cache version...
 473         msr_ret |= v3_hook_msr(core->vm_info, IA32_CSTAR_MSR, NULL, NULL, NULL);
 474
 475         if (msr_ret != 0) {
 476             PrintError("Error configuring MSR save/restore area\n");
 477             return -1;
 478         }
 479
 480
 481     }
 482
 483     /* Sanity check ctrl/reg fields against hw_defaults */
 484
 485
 486
 487
 488     /*** Write all the info to the VMCS ***/
 489
 490     /*
 491     {
 492         // IS THIS NECESSARY???
 493 #define DEBUGCTL_MSR 0x1d9
 494         struct v3_msr tmp_msr;
 495         v3_get_msr(DEBUGCTL_MSR, &(tmp_msr.hi), &(tmp_msr.lo));
 496         vmx_ret |= check_vmcs_write(VMCS_GUEST_DBG_CTL, tmp_msr.value);
 497         core->dbg_regs.dr7 = 0x400;
 498     }
 499     */
 500
 501 #ifdef __V3_64BIT__
 502     vmx_ret |= check_vmcs_write(VMCS_LINK_PTR, (addr_t)0xffffffffffffffffULL);
 503 #else
 504     vmx_ret |= check_vmcs_write(VMCS_LINK_PTR, (addr_t)0xffffffffUL);
 505     vmx_ret |= check_vmcs_write(VMCS_LINK_PTR_HIGH, (addr_t)0xffffffffUL);
 506 #endif
 507
 508
 509
 510
 511     if (v3_update_vmcs_ctrl_fields(core)) {
 512         PrintError("Could not write control fields!\n");
 513         return -1;
 514     }
 515
 516     /*
 517     if (v3_update_vmcs_host_state(core)) {
 518         PrintError("Could not write host state\n");
 519         return -1;
 520     }
 521     */
 522
 523     // reenable global interrupts for vm state initialization now
 524     // that the vm state is initialized. If another VM kicks us off,
 525     // it'll update our vmx state so that we know to reload ourself
 526     v3_enable_ints();
 527
 528     return 0;
 529 }
 530
 531 int v3_init_vmx_vmcs(struct guest_info * core, v3_vm_class_t vm_class) {
 532     struct vmx_data * vmx_state = NULL;
 533     int vmx_ret = 0;
 534
 535     vmx_state = (struct vmx_data *)V3_Malloc(sizeof(struct vmx_data));
 536     memset(vmx_state, 0, sizeof(struct vmx_data));
 537
 538     PrintDebug("vmx_data pointer: %p\n", (void *)vmx_state);
 539
 540     PrintDebug("Allocating VMCS\n");
 541     vmx_state->vmcs_ptr_phys = allocate_vmcs();
 542
 543     PrintDebug("VMCS pointer: %p\n", (void *)(vmx_state->vmcs_ptr_phys));
 544
 545     core->vmm_data = vmx_state;
 546     vmx_state->state = VMX_UNLAUNCHED;
 547
 548     PrintDebug("Initializing VMCS (addr=%p)\n", core->vmm_data);
 549
 550     // TODO: Fix vmcs fields so they're 32-bit
 551
 552     PrintDebug("Clearing VMCS: %p\n", (void *)vmx_state->vmcs_ptr_phys);
 553     vmx_ret = vmcs_clear(vmx_state->vmcs_ptr_phys);
 554
 555     if (vmx_ret != VMX_SUCCESS) {
 556         PrintError("VMCLEAR failed\n");
 557         return -1;
 558     }
 559
 560     if (vm_class == V3_PC_VM) {
 561         PrintDebug("Initializing VMCS\n");
 562         if (init_vmcs_bios(core, vmx_state) == -1) {
 563             PrintError("Error initializing VMCS to BIOS state\n");
 564             return -1;
 565         }
 566     } else {
 567         PrintError("Invalid VM Class\n");
 568         return -1;
 569     }
 570
 571     PrintDebug("Serializing VMCS: %p\n", (void *)vmx_state->vmcs_ptr_phys);
 572     vmx_ret = vmcs_clear(vmx_state->vmcs_ptr_phys);
 573
 574     return 0;
 575 }
 576
 577
 578 int v3_deinit_vmx_vmcs(struct guest_info * core) {
 579     struct vmx_data * vmx_state = core->vmm_data;
 580
 581     V3_FreePages((void *)(vmx_state->vmcs_ptr_phys), 1);
 582     V3_FreePages(V3_PAddr(vmx_state->msr_area), 1);
 583
 584     V3_Free(vmx_state);
 585
 586     return 0;
 587 }
 588
 589
 590
 591 #ifdef V3_CONFIG_CHECKPOINT
 592 /*
 593  * JRL: This is broken
 594  */
 595 int v3_vmx_save_core(struct guest_info * core, void * ctx){
 596     uint64_t vmcs_ptr = vmcs_store();
 597
 598     v3_chkpt_save(ctx, "vmcs_data", PAGE_SIZE, (void *)vmcs_ptr);
 599
 600     return 0;
 601 }
 602
 603 int v3_vmx_load_core(struct guest_info * core, void * ctx){
 604     struct vmx_data * vmx_info = (struct vmx_data *)(core->vmm_data);
 605     struct cr0_32 * shadow_cr0;
 606     char vmcs[PAGE_SIZE_4KB];
 607
 608     v3_chkpt_load(ctx, "vmcs_data", PAGE_SIZE_4KB, vmcs);
 609
 610     vmcs_clear(vmx_info->vmcs_ptr_phys);
 611     vmcs_load((addr_t)vmcs);
 612
 613     v3_vmx_save_vmcs(core);
 614
 615     shadow_cr0 = (struct cr0_32 *)&(core->ctrl_regs.cr0);
 616
 617
 618     /* Get the CPU mode to set the guest_ia32e entry ctrl */
 619
 620     if (core->shdw_pg_mode == SHADOW_PAGING) {
 621         if (v3_get_vm_mem_mode(core) == VIRTUAL_MEM) {
 622             if (v3_activate_shadow_pt(core) == -1) {
 623                 PrintError("Failed to activate shadow page tables\n");
 624                 return -1;
 625             }
 626         } else {
 627             if (v3_activate_passthrough_pt(core) == -1) {
 628                 PrintError("Failed to activate passthrough page tables\n");
 629                 return -1;
 630             }
 631         }
 632     }
 633
 634     return 0;
 635 }
 636 #endif
 637
 638
 639 void v3_flush_vmx_vm_core(struct guest_info * core) {
 640     struct vmx_data * vmx_info = (struct vmx_data *)(core->vmm_data);
 641     vmcs_clear(vmx_info->vmcs_ptr_phys);
 642     vmx_info->state = VMX_UNLAUNCHED;
 643 }
 644
 645
 646
 647 static int update_irq_exit_state(struct guest_info * info) {
 648     struct vmx_exit_idt_vec_info idt_vec_info;
 649
 650     check_vmcs_read(VMCS_IDT_VECTOR_INFO, &(idt_vec_info.value));
 651
 652     if ((info->intr_core_state.irq_started == 1) && (idt_vec_info.valid == 0)) {
 653 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
 654         V3_Print("Calling v3_injecting_intr\n");
 655 #endif
 656         info->intr_core_state.irq_started = 0;
 657         v3_injecting_intr(info, info->intr_core_state.irq_vector, V3_EXTERNAL_IRQ);
 658     }
 659
 660     return 0;
 661 }
 662
 663 static int update_irq_entry_state(struct guest_info * info) {
 664     struct vmx_exit_idt_vec_info idt_vec_info;
 665     struct vmcs_interrupt_state intr_core_state;
 666     struct vmx_data * vmx_info = (struct vmx_data *)(info->vmm_data);
 667
 668     check_vmcs_read(VMCS_IDT_VECTOR_INFO, &(idt_vec_info.value));
 669     check_vmcs_read(VMCS_GUEST_INT_STATE, &(intr_core_state));
 670
 671     /* Check for pending exceptions to inject */
 672     if (v3_excp_pending(info)) {
 673         struct vmx_entry_int_info int_info;
 674         int_info.value = 0;
 675
 676         // In VMX, almost every exception is hardware
 677         // Software exceptions are pretty much only for breakpoint or overflow
 678         int_info.type = 3;
 679         int_info.vector = v3_get_excp_number(info);
 680
 681         if (info->excp_state.excp_error_code_valid) {
 682             check_vmcs_write(VMCS_ENTRY_EXCP_ERR, info->excp_state.excp_error_code);
 683             int_info.error_code = 1;
 684
 685 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
 686             V3_Print("Injecting exception %d with error code %x\n",
 687                     int_info.vector, info->excp_state.excp_error_code);
 688 #endif
 689         }
 690
 691         int_info.valid = 1;
 692 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
 693         V3_Print("Injecting exception %d (EIP=%p)\n", int_info.vector, (void *)(addr_t)info->rip);
 694 #endif
 695         check_vmcs_write(VMCS_ENTRY_INT_INFO, int_info.value);
 696
 697         v3_injecting_excp(info, int_info.vector);
 698
 699     } else if ((((struct rflags *)&(info->ctrl_regs.rflags))->intr == 1) &&
 700                (intr_core_state.val == 0)) {
 701
 702         if ((info->intr_core_state.irq_started == 1) && (idt_vec_info.valid == 1)) {
 703
 704 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
 705             V3_Print("IRQ pending from previous injection\n");
 706 #endif
 707
 708             // Copy the IDT vectoring info over to reinject the old interrupt
 709             if (idt_vec_info.error_code == 1) {
 710                 uint32_t err_code = 0;
 711
 712                 check_vmcs_read(VMCS_IDT_VECTOR_ERR, &err_code);
 713                 check_vmcs_write(VMCS_ENTRY_EXCP_ERR, err_code);
 714             }
 715
 716             idt_vec_info.undef = 0;
 717             check_vmcs_write(VMCS_ENTRY_INT_INFO, idt_vec_info.value);
 718
 719         } else {
 720             struct vmx_entry_int_info ent_int;
 721             ent_int.value = 0;
 722
 723             switch (v3_intr_pending(info)) {
 724                 case V3_EXTERNAL_IRQ: {
 725                     info->intr_core_state.irq_vector = v3_get_intr(info);
 726                     ent_int.vector = info->intr_core_state.irq_vector;
 727                     ent_int.type = 0;
 728                     ent_int.error_code = 0;
 729                     ent_int.valid = 1;
 730
 731 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
 732                     V3_Print("Injecting Interrupt %d at exit %u(EIP=%p)\n",
 733                                info->intr_core_state.irq_vector,
 734                                (uint32_t)info->num_exits,
 735                                (void *)(addr_t)info->rip);
 736 #endif
 737
 738                     check_vmcs_write(VMCS_ENTRY_INT_INFO, ent_int.value);
 739                     info->intr_core_state.irq_started = 1;
 740
 741                     break;
 742                 }
 743                 case V3_NMI:
 744                     PrintDebug("Injecting NMI\n");
 745
 746                     ent_int.type = 2;
 747                     ent_int.vector = 2;
 748                     ent_int.valid = 1;
 749                     check_vmcs_write(VMCS_ENTRY_INT_INFO, ent_int.value);
 750
 751                     break;
 752                 case V3_SOFTWARE_INTR:
 753                     PrintDebug("Injecting software interrupt\n");
 754                     ent_int.type = 4;
 755
 756                     ent_int.valid = 1;
 757                     check_vmcs_write(VMCS_ENTRY_INT_INFO, ent_int.value);
 758
 759                     break;
 760                 case V3_VIRTUAL_IRQ:
 761                     // Not sure what to do here, Intel doesn't have virtual IRQs
 762                     // May be the same as external interrupts/IRQs
 763
 764                     break;
 765                 case V3_INVALID_INTR:
 766                 default:
 767                     break;
 768             }
 769         }
 770     } else if ((v3_intr_pending(info)) && (vmx_info->pri_proc_ctrls.int_wndw_exit == 0)) {
 771         // Enable INTR window exiting so we know when IF=1
 772         uint32_t instr_len;
 773
 774         check_vmcs_read(VMCS_EXIT_INSTR_LEN, &instr_len);
 775
 776 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
 777         V3_Print("Enabling Interrupt-Window exiting: %d\n", instr_len);
 778 #endif
 779
 780         vmx_info->pri_proc_ctrls.int_wndw_exit = 1;
 781         check_vmcs_write(VMCS_PROC_CTRLS, vmx_info->pri_proc_ctrls.value);
 782     }
 783
 784
 785     return 0;
 786 }
 787
 788
 789
 790 static struct vmx_exit_info exit_log[10];
 791 static uint64_t rip_log[10];
 792
 793
 794
 795 static void print_exit_log(struct guest_info * info) {
 796     int cnt = info->num_exits % 10;
 797     int i = 0;
 798
 799
 800     V3_Print("\nExit Log (%d total exits):\n", (uint32_t)info->num_exits);
 801
 802     for (i = 0; i < 10; i++) {
 803         struct vmx_exit_info * tmp = &exit_log[cnt];
 804
 805         V3_Print("%d:\texit_reason = %p\n", i, (void *)(addr_t)tmp->exit_reason);
 806         V3_Print("\texit_qual = %p\n", (void *)tmp->exit_qual);
 807         V3_Print("\tint_info = %p\n", (void *)(addr_t)tmp->int_info);
 808         V3_Print("\tint_err = %p\n", (void *)(addr_t)tmp->int_err);
 809         V3_Print("\tinstr_info = %p\n", (void *)(addr_t)tmp->instr_info);
 810         V3_Print("\tguest_linear_addr= %p\n", (void *)(addr_t)tmp->guest_linear_addr);
 811         V3_Print("\tRIP = %p\n", (void *)rip_log[cnt]);
 812
 813
 814         cnt--;
 815
 816         if (cnt == -1) {
 817             cnt = 9;
 818         }
 819
 820     }
 821
 822 }
 823
 824 int
 825 v3_vmx_schedule_timeout(struct guest_info * info)
 826 {
 827     struct vmx_data * vmx_state = (struct vmx_data *)(info->vmm_data);
 828     sint64_t cycles;
 829     uint32_t timeout;
 830
 831     /* Check if the hardware supports an active timeout */
 832 #define VMX_ACTIVE_PREEMPT_TIMER_PIN 0x40
 833     if (hw_info.pin_ctrls.req_mask & VMX_ACTIVE_PREEMPT_TIMER_PIN) {
 834         /* The hardware doesn't support us modifying this pin control */
 835         return 0;
 836     }
 837
 838     /* Check if we have one to schedule and schedule it if we do */
 839     cycles = (sint64_t)info->time_state.next_timeout - (sint64_t)v3_get_guest_time(&info->time_state);
 840     if (info->time_state.next_timeout == (ullong_t) -1)  {
 841         timeout = 0;
 842         vmx_state->pin_ctrls.active_preempt_timer = 0;
 843     } else if (cycles < 0) {
 844         /* set the timeout to 0 to force an immediate re-exit since it expired between
 845          * when we checked a timeout and now. IF SOMEONE CONTINAULLY SETS A SHORT TIMEOUT,
 846          * THIS CAN LOCK US OUT OF THE GUEST! */
 847         timeout = 0;
 848         vmx_state->pin_ctrls.active_preempt_timer = 1;
 849     } else {
 850         /* The hardware supports scheduling a timeout, and we have one to
 851          * schedule */
 852         timeout = (uint32_t)cycles >> hw_info.misc_info.tsc_multiple;
 853         vmx_state->pin_ctrls.active_preempt_timer = 1;
 854     }
 855
 856     /* Actually program the timer based on the settings above. */
 857     check_vmcs_write(VMCS_PREEMPT_TIMER, timeout);
 858     check_vmcs_write(VMCS_PIN_CTRLS, vmx_state->pin_ctrls.value);
 859     return 0;
 860 }
 861
 862 /*
 863  * CAUTION and DANGER!!!
 864  *
 865  * The VMCS CANNOT(!!) be accessed outside of the cli/sti calls inside this function
 866  * When exectuing a symbiotic call, the VMCS WILL be overwritten, so any dependencies
 867  * on its contents will cause things to break. The contents at the time of the exit WILL
 868  * change before the exit handler is executed.
 869  */
 870 int v3_vmx_enter(struct guest_info * info) {
 871     int ret = 0;
 872     uint32_t tsc_offset_low, tsc_offset_high;
 873     struct vmx_exit_info exit_info;
 874     struct vmx_data * vmx_info = (struct vmx_data *)(info->vmm_data);
 875
 876     // Conditionally yield the CPU if the timeslice has expired
 877     v3_yield_cond(info);
 878
 879     // Perform any additional yielding needed for time adjustment
 880     v3_adjust_time(info);
 881
 882     // Check for timeout - since this calls generic hooks in devices
 883     // that may do things like pause the VM, it cannot be with interrupts
 884     // disabled.
 885     v3_check_timeout(info);
 886
 887     // disable global interrupts for vm state transition
 888     v3_disable_ints();
 889
 890     // Update timer devices late after being in the VM so that as much
 891     // of the time in the VM is accounted for as possible. Also do it before
 892     // updating IRQ entry state so that any interrupts the timers raise get
 893     // handled on the next VM entry. Must be done with interrupts disabled.
 894     v3_update_timers(info);
 895
 896     if (vmcs_store() != vmx_info->vmcs_ptr_phys) {
 897         vmcs_clear(vmx_info->vmcs_ptr_phys);
 898         vmcs_load(vmx_info->vmcs_ptr_phys);
 899         vmx_info->state = VMX_UNLAUNCHED;
 900     }
 901
 902     v3_vmx_restore_vmcs(info);
 903
 904
 905 #ifdef V3_CONFIG_SYMCALL
 906     if (info->sym_core_state.symcall_state.sym_call_active == 0) {
 907         update_irq_entry_state(info);
 908     }
 909 #else
 910     update_irq_entry_state(info);
 911 #endif
 912
 913     {
 914         addr_t guest_cr3;
 915         vmcs_read(VMCS_GUEST_CR3, &guest_cr3);
 916         vmcs_write(VMCS_GUEST_CR3, guest_cr3);
 917     }
 918
 919     // Update vmx active preemption timer to exit at the next timeout if
 920     // the hardware supports it.
 921     v3_vmx_schedule_timeout(info);
 922
 923     // Perform last-minute time bookkeeping prior to entering the VM
 924     v3_time_enter_vm(info);
 925
 926     tsc_offset_high = (uint32_t)((v3_tsc_host_offset(&info->time_state) >> 32) & 0xffffffff);
 927     tsc_offset_low = (uint32_t)(v3_tsc_host_offset(&info->time_state) & 0xffffffff);
 928     check_vmcs_write(VMCS_TSC_OFFSET_HIGH, tsc_offset_high);
 929     check_vmcs_write(VMCS_TSC_OFFSET, tsc_offset_low);
 930
 931     if (v3_update_vmcs_host_state(info)) {
 932         v3_enable_ints();
 933         PrintError("Could not write host state\n");
 934         return -1;
 935     }
 936
 937
 938     if (vmx_info->state == VMX_UNLAUNCHED) {
 939         vmx_info->state = VMX_LAUNCHED;
 940         ret = v3_vmx_launch(&(info->vm_regs), info, &(info->ctrl_regs));
 941     } else {
 942         V3_ASSERT(vmx_info->state != VMX_UNLAUNCHED);
 943         ret = v3_vmx_resume(&(info->vm_regs), info, &(info->ctrl_regs));
 944     }
 945
 946
 947
 948     //  PrintDebug("VMX Exit: ret=%d\n", ret);
 949
 950     if (ret != VMX_SUCCESS) {
 951         uint32_t error = 0;
 952         vmcs_read(VMCS_INSTR_ERR, &error);
 953
 954         v3_enable_ints();
 955
 956         PrintError("VMENTRY Error: %d (launch_ret = %d)\n", error, ret);
 957         return -1;
 958     }
 959
 960
 961
 962     // Immediate exit from VM time bookkeeping
 963     v3_time_exit_vm(info);
 964
 965     info->num_exits++;
 966
 967     /* Update guest state */
 968     v3_vmx_save_vmcs(info);
 969
 970     // info->cpl = info->segments.cs.selector & 0x3;
 971
 972     info->mem_mode = v3_get_vm_mem_mode(info);
 973     info->cpu_mode = v3_get_vm_cpu_mode(info);
 974
 975
 976     check_vmcs_read(VMCS_EXIT_INSTR_LEN, &(exit_info.instr_len));
 977     check_vmcs_read(VMCS_EXIT_INSTR_INFO, &(exit_info.instr_info));
 978     check_vmcs_read(VMCS_EXIT_REASON, &(exit_info.exit_reason));
 979     check_vmcs_read(VMCS_EXIT_QUAL, &(exit_info.exit_qual));
 980     check_vmcs_read(VMCS_EXIT_INT_INFO, &(exit_info.int_info));
 981     check_vmcs_read(VMCS_EXIT_INT_ERR, &(exit_info.int_err));
 982     check_vmcs_read(VMCS_GUEST_LINEAR_ADDR, &(exit_info.guest_linear_addr));
 983
 984     if (info->shdw_pg_mode == NESTED_PAGING) {
 985         check_vmcs_read(VMCS_GUEST_PHYS_ADDR, &(exit_info.ept_fault_addr));
 986     }
 987
 988     //PrintDebug("VMX Exit taken, id-qual: %u-%lu\n", exit_info.exit_reason, exit_info.exit_qual);
 989
 990     exit_log[info->num_exits % 10] = exit_info;
 991     rip_log[info->num_exits % 10] = get_addr_linear(info, info->rip, &(info->segments.cs));
 992
 993 #ifdef V3_CONFIG_SYMCALL
 994     if (info->sym_core_state.symcall_state.sym_call_active == 0) {
 995         update_irq_exit_state(info);
 996     }
 997 #else
 998     update_irq_exit_state(info);
 999 #endif
1000
1001     if (exit_info.exit_reason == VMEXIT_INTR_WINDOW) {
1002         // This is a special case whose only job is to inject an interrupt
1003         vmcs_read(VMCS_PROC_CTRLS, &(vmx_info->pri_proc_ctrls.value));
1004         vmx_info->pri_proc_ctrls.int_wndw_exit = 0;
1005         vmcs_write(VMCS_PROC_CTRLS, vmx_info->pri_proc_ctrls.value);
1006
1007 #ifdef V3_CONFIG_DEBUG_INTERRUPTS
1008        V3_Print("Interrupts available again! (RIP=%llx)\n", info->rip);
1009 #endif
1010     }
1011
1012     // reenable global interrupts after vm exit
1013     v3_enable_ints();
1014
1015     // Conditionally yield the CPU if the timeslice has expired
1016     v3_yield_cond(info);
1017
1018     if (v3_handle_vmx_exit(info, &exit_info) == -1) {
1019         PrintError("Error in VMX exit handler (Exit reason=%x)\n", exit_info.exit_reason);
1020         return -1;
1021     }
1022
1023     return 0;
1024 }
1025
1026
1027 int v3_start_vmx_guest(struct guest_info * info) {
1028
1029     PrintDebug("Starting VMX core %u\n", info->vcpu_id);
1030
1031     if (info->vcpu_id == 0) {
1032         info->core_run_state = CORE_RUNNING;
1033     } else {
1034
1035         PrintDebug("VMX core %u: Waiting for core initialization\n", info->vcpu_id);
1036
1037         while (info->core_run_state == CORE_STOPPED) {
1038
1039             if (info->vm_info->run_state == VM_STOPPED) {
1040                 // The VM was stopped before this core was initialized.
1041                 return 0;
1042             }
1043
1044             v3_yield(info);
1045             //PrintDebug("VMX core %u: still waiting for INIT\n",info->vcpu_id);
1046         }
1047
1048         PrintDebug("VMX core %u initialized\n", info->vcpu_id);
1049
1050         // We'll be paranoid about race conditions here
1051         v3_wait_at_barrier(info);
1052     }
1053
1054
1055     PrintDebug("VMX core %u: I am starting at CS=0x%x (base=0x%p, limit=0x%x),  RIP=0x%p\n",
1056                info->vcpu_id, info->segments.cs.selector, (void *)(info->segments.cs.base),
1057                info->segments.cs.limit, (void *)(info->rip));
1058
1059
1060     PrintDebug("VMX core %u: Launching VMX VM on logical core %u\n", info->vcpu_id, info->pcpu_id);
1061
1062     v3_start_time(info);
1063
1064     while (1) {
1065
1066         if (info->vm_info->run_state == VM_STOPPED) {
1067             info->core_run_state = CORE_STOPPED;
1068             break;
1069         }
1070
1071         if (v3_vmx_enter(info) == -1) {
1072
1073             addr_t host_addr;
1074             addr_t linear_addr = 0;
1075
1076             info->vm_info->run_state = VM_ERROR;
1077
1078             V3_Print("VMX core %u: VMX ERROR!!\n", info->vcpu_id);
1079
1080             v3_print_guest_state(info);
1081
1082             V3_Print("VMX core %u\n", info->vcpu_id);
1083
1084             linear_addr = get_addr_linear(info, info->rip, &(info->segments.cs));
1085
1086             if (info->mem_mode == PHYSICAL_MEM) {
1087                 v3_gpa_to_hva(info, linear_addr, &host_addr);
1088             } else if (info->mem_mode == VIRTUAL_MEM) {
1089                 v3_gva_to_hva(info, linear_addr, &host_addr);
1090             }
1091
1092             V3_Print("VMX core %u: Host Address of rip = 0x%p\n", info->vcpu_id, (void *)host_addr);
1093
1094             V3_Print("VMX core %u: Instr (15 bytes) at %p:\n", info->vcpu_id, (void *)host_addr);
1095             v3_dump_mem((uint8_t *)host_addr, 15);
1096
1097             v3_print_stack(info);
1098
1099
1100             v3_print_vmcs();
1101             print_exit_log(info);
1102             return -1;
1103         }
1104
1105         v3_wait_at_barrier(info);
1106
1107
1108         if (info->vm_info->run_state == VM_STOPPED) {
1109             info->core_run_state = CORE_STOPPED;
1110             break;
1111         }
1112 /*
1113         if ((info->num_exits % 5000) == 0) {
1114             V3_Print("VMX Exit number %d\n", (uint32_t)info->num_exits);
1115         }
1116 */
1117
1118     }
1119
1120     return 0;
1121 }
1122
1123
1124
1125
1126 #define VMX_FEATURE_CONTROL_MSR     0x0000003a
1127 #define CPUID_VMX_FEATURES 0x00000005  /* LOCK and VMXON */
1128 #define CPUID_1_ECX_VTXFLAG 0x00000020
1129
1130 int v3_is_vmx_capable() {
1131     v3_msr_t feature_msr;
1132     uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
1133
1134     v3_cpuid(0x1, &eax, &ebx, &ecx, &edx);
1135
1136     PrintDebug("ECX: 0x%x\n", ecx);
1137
1138     if (ecx & CPUID_1_ECX_VTXFLAG) {
1139         v3_get_msr(VMX_FEATURE_CONTROL_MSR, &(feature_msr.hi), &(feature_msr.lo));
1140
1141         PrintDebug("MSRREGlow: 0x%.8x\n", feature_msr.lo);
1142
1143         if ((feature_msr.lo & CPUID_VMX_FEATURES) != CPUID_VMX_FEATURES) {
1144             PrintDebug("VMX is locked -- enable in the BIOS\n");
1145             return 0;
1146         }
1147
1148     } else {
1149         PrintDebug("VMX not supported on this cpu\n");
1150         return 0;
1151     }
1152
1153     return 1;
1154 }
1155
1156
1157 int v3_reset_vmx_vm_core(struct guest_info * core, addr_t rip) {
1158     // init vmcs bios
1159
1160     if ((core->shdw_pg_mode == NESTED_PAGING) &&
1161         (v3_cpu_types[core->pcpu_id] == V3_VMX_EPT_UG_CPU)) {
1162         // easy
1163         core->rip = 0;
1164         core->segments.cs.selector = rip << 8;
1165         core->segments.cs.limit = 0xffff;
1166         core->segments.cs.base = rip << 12;
1167     } else {
1168         core->vm_regs.rdx = core->vcpu_id;
1169         core->vm_regs.rbx = rip;
1170     }
1171
1172     return 0;
1173 }
1174
1175
1176
1177 void v3_init_vmx_cpu(int cpu_id) {
1178     addr_t vmx_on_region = 0;
1179     extern v3_cpu_arch_t v3_mach_type;
1180
1181     if (v3_mach_type == V3_INVALID_CPU) {
1182         if (v3_init_vmx_hw(&hw_info) == -1) {
1183             PrintError("Could not initialize VMX hardware features on cpu %d\n", cpu_id);
1184             return;
1185         }
1186     }
1187
1188     enable_vmx();
1189
1190
1191     // Setup VMXON Region
1192     vmx_on_region = allocate_vmcs();
1193
1194
1195     if (vmx_on(vmx_on_region) == VMX_SUCCESS) {
1196         V3_Print("VMX Enabled\n");
1197         host_vmcs_ptrs[cpu_id] = vmx_on_region;
1198     } else {
1199         V3_Print("VMX already enabled\n");
1200         V3_FreePages((void *)vmx_on_region, 1);
1201     }
1202
1203     PrintDebug("VMXON pointer: 0x%p\n", (void *)host_vmcs_ptrs[cpu_id]);
1204
1205     {
1206         struct vmx_sec_proc_ctrls sec_proc_ctrls;
1207         sec_proc_ctrls.value = v3_vmx_get_ctrl_features(&(hw_info.sec_proc_ctrls));
1208
1209         if (sec_proc_ctrls.enable_ept == 0) {
1210             V3_Print("VMX EPT (Nested) Paging not supported\n");
1211             v3_cpu_types[cpu_id] = V3_VMX_CPU;
1212         } else if (sec_proc_ctrls.unrstrct_guest == 0) {
1213             V3_Print("VMX EPT (Nested) Paging supported\n");
1214             v3_cpu_types[cpu_id] = V3_VMX_EPT_CPU;
1215         } else {
1216             V3_Print("VMX EPT (Nested) Paging + Unrestricted guest supported\n");
1217             v3_cpu_types[cpu_id] = V3_VMX_EPT_UG_CPU;
1218         }
1219     }
1220
1221 }
1222
1223
1224 void v3_deinit_vmx_cpu(int cpu_id) {
1225     extern v3_cpu_arch_t v3_cpu_types[];
1226     v3_cpu_types[cpu_id] = V3_INVALID_CPU;
1227
1228     if (host_vmcs_ptrs[cpu_id] != 0) {
1229         V3_Print("Disabling VMX\n");
1230
1231         if (vmx_off() != VMX_SUCCESS) {
1232             PrintError("Error executing VMXOFF\n");
1233         }
1234
1235         V3_FreePages((void *)host_vmcs_ptrs[cpu_id], 1);
1236
1237         host_vmcs_ptrs[cpu_id] = 0;
1238     }
1239 }