palacios/src/palacios/svm.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
  21 #include <palacios/svm.h>
  22 #include <palacios/vmm.h>
  23
  24 #include <palacios/vmcb.h>
  25 #include <palacios/vmm_mem.h>
  26 #include <palacios/vmm_paging.h>
  27 #include <palacios/svm_handler.h>
  28
  29 #include <palacios/vmm_debug.h>
  30 #include <palacios/vm_guest_mem.h>
  31
  32 #include <palacios/vmm_decoder.h>
  33 #include <palacios/vmm_string.h>
  34 #include <palacios/vmm_lowlevel.h>
  35 #include <palacios/svm_msr.h>
  36
  37 #include <palacios/vmm_rbtree.h>
  38
  39 #include <palacios/vmm_direct_paging.h>
  40
  41 #include <palacios/vmm_ctrl_regs.h>
  42 #include <palacios/svm_io.h>
  43
  44 #include <palacios/vmm_sprintf.h>
  45
  46
  47 uint32_t v3_last_exit;
  48
  49 // This is a global pointer to the host's VMCB
  50 static addr_t host_vmcbs[CONFIG_MAX_CPUS] = { [0 ... CONFIG_MAX_CPUS - 1] = 0};
  51
  52
  53
  54 extern void v3_stgi();
  55 extern void v3_clgi();
  56 //extern int v3_svm_launch(vmcb_t * vmcb, struct v3_gprs * vm_regs, uint64_t * fs, uint64_t * gs);
  57 extern int v3_svm_launch(vmcb_t * vmcb, struct v3_gprs * vm_regs, vmcb_t * host_vmcb);
  58
  59
  60 static vmcb_t * Allocate_VMCB() {
  61     vmcb_t * vmcb_page = (vmcb_t *)V3_VAddr(V3_AllocPages(1));
  62
  63     memset(vmcb_page, 0, 4096);
  64
  65     return vmcb_page;
  66 }
  67
  68
  69
  70 static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info * core) {
  71     vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
  72     vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA(vmcb);
  73     uint_t i;
  74
  75
  76     //
  77
  78
  79     ctrl_area->svm_instrs.VMRUN = 1;
  80     ctrl_area->svm_instrs.VMMCALL = 1;
  81     ctrl_area->svm_instrs.VMLOAD = 1;
  82     ctrl_area->svm_instrs.VMSAVE = 1;
  83     ctrl_area->svm_instrs.STGI = 1;
  84     ctrl_area->svm_instrs.CLGI = 1;
  85     ctrl_area->svm_instrs.SKINIT = 1;
  86     ctrl_area->svm_instrs.RDTSCP = 1;
  87     ctrl_area->svm_instrs.ICEBP = 1;
  88     ctrl_area->svm_instrs.WBINVD = 1;
  89     ctrl_area->svm_instrs.MONITOR = 1;
  90     ctrl_area->svm_instrs.MWAIT_always = 1;
  91     ctrl_area->svm_instrs.MWAIT_if_armed = 1;
  92     ctrl_area->instrs.INVLPGA = 1;
  93     ctrl_area->instrs.CPUID = 1;
  94
  95     ctrl_area->instrs.HLT = 1;
  96     // guest_state->cr0 = 0x00000001;    // PE
  97
  98     /*
  99       ctrl_area->exceptions.de = 1;
 100       ctrl_area->exceptions.df = 1;
 101
 102       ctrl_area->exceptions.ts = 1;
 103       ctrl_area->exceptions.ss = 1;
 104       ctrl_area->exceptions.ac = 1;
 105       ctrl_area->exceptions.mc = 1;
 106       ctrl_area->exceptions.gp = 1;
 107       ctrl_area->exceptions.ud = 1;
 108       ctrl_area->exceptions.np = 1;
 109       ctrl_area->exceptions.of = 1;
 110
 111       ctrl_area->exceptions.nmi = 1;
 112     */
 113
 114
 115     ctrl_area->instrs.NMI = 1;
 116     ctrl_area->instrs.SMI = 1;
 117     ctrl_area->instrs.INIT = 1;
 118     ctrl_area->instrs.PAUSE = 1;
 119     ctrl_area->instrs.shutdown_evts = 1;
 120
 121
 122     /* DEBUG FOR RETURN CODE */
 123     ctrl_area->exit_code = 1;
 124
 125
 126     /* Setup Guest Machine state */
 127
 128     core->vm_regs.rsp = 0x00;
 129     core->rip = 0xfff0;
 130
 131     core->vm_regs.rdx = 0x00000f00;
 132
 133
 134     core->cpl = 0;
 135
 136     core->ctrl_regs.rflags = 0x00000002; // The reserved bit is always 1
 137     core->ctrl_regs.cr0 = 0x60010010; // Set the WP flag so the memory hooks work in real-mode
 138     core->ctrl_regs.efer |= EFER_MSR_svm_enable;
 139
 140
 141
 142
 143
 144     core->segments.cs.selector = 0xf000;
 145     core->segments.cs.limit = 0xffff;
 146     core->segments.cs.base = 0x0000000f0000LL;
 147
 148     // (raw attributes = 0xf3)
 149     core->segments.cs.type = 0x3;
 150     core->segments.cs.system = 0x1;
 151     core->segments.cs.dpl = 0x3;
 152     core->segments.cs.present = 1;
 153
 154
 155
 156     struct v3_segment * segregs [] = {&(core->segments.ss), &(core->segments.ds),
 157                                       &(core->segments.es), &(core->segments.fs),
 158                                       &(core->segments.gs), NULL};
 159
 160     for ( i = 0; segregs[i] != NULL; i++) {
 161         struct v3_segment * seg = segregs[i];
 162
 163         seg->selector = 0x0000;
 164         //    seg->base = seg->selector << 4;
 165         seg->base = 0x00000000;
 166         seg->limit = ~0u;
 167
 168         // (raw attributes = 0xf3)
 169         seg->type = 0x3;
 170         seg->system = 0x1;
 171         seg->dpl = 0x3;
 172         seg->present = 1;
 173     }
 174
 175     core->segments.gdtr.limit = 0x0000ffff;
 176     core->segments.gdtr.base = 0x0000000000000000LL;
 177     core->segments.idtr.limit = 0x0000ffff;
 178     core->segments.idtr.base = 0x0000000000000000LL;
 179
 180     core->segments.ldtr.selector = 0x0000;
 181     core->segments.ldtr.limit = 0x0000ffff;
 182     core->segments.ldtr.base = 0x0000000000000000LL;
 183     core->segments.tr.selector = 0x0000;
 184     core->segments.tr.limit = 0x0000ffff;
 185     core->segments.tr.base = 0x0000000000000000LL;
 186
 187
 188     core->dbg_regs.dr6 = 0x00000000ffff0ff0LL;
 189     core->dbg_regs.dr7 = 0x0000000000000400LL;
 190
 191
 192     ctrl_area->IOPM_BASE_PA = (addr_t)V3_PAddr(core->vm_info->io_map.arch_data);
 193     ctrl_area->instrs.IOIO_PROT = 1;
 194
 195     ctrl_area->MSRPM_BASE_PA = (addr_t)V3_PAddr(core->vm_info->msr_map.arch_data);
 196     ctrl_area->instrs.MSR_PROT = 1;
 197
 198
 199     PrintDebug("Exiting on interrupts\n");
 200     ctrl_area->guest_ctrl.V_INTR_MASKING = 1;
 201     ctrl_area->instrs.INTR = 1;
 202
 203
 204     if (core->shdw_pg_mode == SHADOW_PAGING) {
 205         PrintDebug("Creating initial shadow page table\n");
 206
 207         /* JRL: This is a performance killer, and a simplistic solution */
 208         /* We need to fix this */
 209         ctrl_area->TLB_CONTROL = 1;
 210         ctrl_area->guest_ASID = 1;
 211
 212
 213         if (v3_init_passthrough_pts(core) == -1) {
 214             PrintError("Could not initialize passthrough page tables\n");
 215             return ;
 216         }
 217
 218
 219         core->shdw_pg_state.guest_cr0 = 0x0000000000000010LL;
 220         PrintDebug("Created\n");
 221
 222         core->ctrl_regs.cr0 |= 0x80000000;
 223         core->ctrl_regs.cr3 = core->direct_map_pt;
 224
 225         ctrl_area->cr_reads.cr0 = 1;
 226         ctrl_area->cr_writes.cr0 = 1;
 227         //ctrl_area->cr_reads.cr4 = 1;
 228         ctrl_area->cr_writes.cr4 = 1;
 229         ctrl_area->cr_reads.cr3 = 1;
 230         ctrl_area->cr_writes.cr3 = 1;
 231
 232         v3_hook_msr(core->vm_info, EFER_MSR,
 233                     &v3_handle_efer_read,
 234                     &v3_handle_efer_write,
 235                     core);
 236
 237         ctrl_area->instrs.INVLPG = 1;
 238
 239         ctrl_area->exceptions.pf = 1;
 240
 241         guest_state->g_pat = 0x7040600070406ULL;
 242
 243
 244
 245     } else if (core->shdw_pg_mode == NESTED_PAGING) {
 246         // Flush the TLB on entries/exits
 247         ctrl_area->TLB_CONTROL = 1;
 248         ctrl_area->guest_ASID = 1;
 249
 250         // Enable Nested Paging
 251         ctrl_area->NP_ENABLE = 1;
 252
 253         PrintDebug("NP_Enable at 0x%p\n", (void *)&(ctrl_area->NP_ENABLE));
 254
 255         // Set the Nested Page Table pointer
 256         if (v3_init_passthrough_pts(core) == -1) {
 257             PrintError("Could not initialize Nested page tables\n");
 258             return ;
 259         }
 260
 261         ctrl_area->N_CR3 = core->direct_map_pt;
 262
 263         guest_state->g_pat = 0x7040600070406ULL;
 264     }
 265 }
 266
 267
 268 int v3_init_svm_vmcb(struct guest_info * info, v3_vm_class_t vm_class) {
 269
 270     PrintDebug("Allocating VMCB\n");
 271     info->vmm_data = (void*)Allocate_VMCB();
 272
 273     if (vm_class == V3_PC_VM) {
 274         PrintDebug("Initializing VMCB (addr=%p)\n", (void *)info->vmm_data);
 275         Init_VMCB_BIOS((vmcb_t*)(info->vmm_data), info);
 276     } else {
 277         PrintError("Invalid VM class\n");
 278         return -1;
 279     }
 280
 281     return 0;
 282 }
 283
 284
 285
 286 static int update_irq_exit_state(struct guest_info * info) {
 287     vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 288
 289     if ((info->intr_core_state.irq_pending == 1) && (guest_ctrl->guest_ctrl.V_IRQ == 0)) {
 290
 291 #ifdef CONFIG_DEBUG_INTERRUPTS
 292         PrintDebug("INTAK cycle completed for irq %d\n", info->intr_core_state.irq_vector);
 293 #endif
 294
 295         info->intr_core_state.irq_started = 1;
 296         info->intr_core_state.irq_pending = 0;
 297
 298         v3_injecting_intr(info, info->intr_core_state.irq_vector, V3_EXTERNAL_IRQ);
 299     }
 300
 301     if ((info->intr_core_state.irq_started == 1) && (guest_ctrl->exit_int_info.valid == 0)) {
 302 #ifdef CONFIG_DEBUG_INTERRUPTS
 303         PrintDebug("Interrupt %d taken by guest\n", info->intr_core_state.irq_vector);
 304 #endif
 305
 306         // Interrupt was taken fully vectored
 307         info->intr_core_state.irq_started = 0;
 308
 309     } else if ((info->intr_core_state.irq_started == 1) && (guest_ctrl->exit_int_info.valid == 1)) {
 310 #ifdef CONFIG_DEBUG_INTERRUPTS
 311         PrintDebug("EXIT INT INFO is set (vec=%d)\n", guest_ctrl->exit_int_info.vector);
 312 #endif
 313     }
 314
 315     return 0;
 316 }
 317
 318
 319 static int update_irq_entry_state(struct guest_info * info) {
 320     vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 321
 322
 323     if (info->intr_core_state.irq_pending == 0) {
 324         guest_ctrl->guest_ctrl.V_IRQ = 0;
 325         guest_ctrl->guest_ctrl.V_INTR_VECTOR = 0;
 326     }
 327
 328     if (v3_excp_pending(info)) {
 329         uint_t excp = v3_get_excp_number(info);
 330
 331         guest_ctrl->EVENTINJ.type = SVM_INJECTION_EXCEPTION;
 332
 333         if (info->excp_state.excp_error_code_valid) {
 334             guest_ctrl->EVENTINJ.error_code = info->excp_state.excp_error_code;
 335             guest_ctrl->EVENTINJ.ev = 1;
 336 #ifdef CONFIG_DEBUG_INTERRUPTS
 337             PrintDebug("Injecting exception %d with error code %x\n", excp, guest_ctrl->EVENTINJ.error_code);
 338 #endif
 339         }
 340
 341         guest_ctrl->EVENTINJ.vector = excp;
 342
 343         guest_ctrl->EVENTINJ.valid = 1;
 344
 345 #ifdef CONFIG_DEBUG_INTERRUPTS
 346         PrintDebug("<%d> Injecting Exception %d (CR2=%p) (EIP=%p)\n",
 347                    (int)info->num_exits,
 348                    guest_ctrl->EVENTINJ.vector,
 349                    (void *)(addr_t)info->ctrl_regs.cr2,
 350                    (void *)(addr_t)info->rip);
 351 #endif
 352
 353         v3_injecting_excp(info, excp);
 354     } else if (info->intr_core_state.irq_started == 1) {
 355 #ifdef CONFIG_DEBUG_INTERRUPTS
 356         PrintDebug("IRQ pending from previous injection\n");
 357 #endif
 358         guest_ctrl->guest_ctrl.V_IRQ = 1;
 359         guest_ctrl->guest_ctrl.V_INTR_VECTOR = info->intr_core_state.irq_vector;
 360         guest_ctrl->guest_ctrl.V_IGN_TPR = 1;
 361         guest_ctrl->guest_ctrl.V_INTR_PRIO = 0xf;
 362
 363     } else {
 364         switch (v3_intr_pending(info)) {
 365             case V3_EXTERNAL_IRQ: {
 366                 uint32_t irq = v3_get_intr(info);
 367
 368                 guest_ctrl->guest_ctrl.V_IRQ = 1;
 369                 guest_ctrl->guest_ctrl.V_INTR_VECTOR = irq;
 370                 guest_ctrl->guest_ctrl.V_IGN_TPR = 1;
 371                 guest_ctrl->guest_ctrl.V_INTR_PRIO = 0xf;
 372
 373 #ifdef CONFIG_DEBUG_INTERRUPTS
 374                 PrintDebug("Injecting Interrupt %d (EIP=%p)\n",
 375                            guest_ctrl->guest_ctrl.V_INTR_VECTOR,
 376                            (void *)(addr_t)info->rip);
 377 #endif
 378
 379                 info->intr_core_state.irq_pending = 1;
 380                 info->intr_core_state.irq_vector = irq;
 381
 382                 break;
 383             }
 384             case V3_NMI:
 385                 guest_ctrl->EVENTINJ.type = SVM_INJECTION_NMI;
 386                 break;
 387             case V3_SOFTWARE_INTR:
 388                 guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
 389                 break;
 390             case V3_VIRTUAL_IRQ:
 391                 guest_ctrl->EVENTINJ.type = SVM_INJECTION_IRQ;
 392                 break;
 393
 394             case V3_INVALID_INTR:
 395             default:
 396                 break;
 397         }
 398
 399     }
 400
 401     return 0;
 402 }
 403
 404
 405 /*
 406  * CAUTION and DANGER!!!
 407  *
 408  * The VMCB CANNOT(!!) be accessed outside of the clgi/stgi calls inside this function
 409  * When exectuing a symbiotic call, the VMCB WILL be overwritten, so any dependencies
 410  * on its contents will cause things to break. The contents at the time of the exit WILL
 411  * change before the exit handler is executed.
 412  */
 413 int v3_svm_enter(struct guest_info * info) {
 414     vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 415     vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
 416     ullong_t tmp_tsc;
 417     addr_t exit_code = 0, exit_info1 = 0, exit_info2 = 0;
 418
 419     // Conditionally yield the CPU if the timeslice has expired
 420     v3_yield_cond(info);
 421
 422     // disable global interrupts for vm state transition
 423     v3_clgi();
 424
 425     // Synchronize the guest state to the VMCB
 426     guest_state->cr0 = info->ctrl_regs.cr0;
 427     guest_state->cr2 = info->ctrl_regs.cr2;
 428     guest_state->cr3 = info->ctrl_regs.cr3;
 429     guest_state->cr4 = info->ctrl_regs.cr4;
 430     guest_state->dr6 = info->dbg_regs.dr6;
 431     guest_state->dr7 = info->dbg_regs.dr7;
 432     guest_ctrl->guest_ctrl.V_TPR = info->ctrl_regs.cr8 & 0xff;
 433     guest_state->rflags = info->ctrl_regs.rflags;
 434     guest_state->efer = info->ctrl_regs.efer;
 435
 436     guest_state->cpl = info->cpl;
 437
 438     v3_set_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
 439
 440     guest_state->rax = info->vm_regs.rax;
 441     guest_state->rip = info->rip;
 442     guest_state->rsp = info->vm_regs.rsp;
 443
 444 #ifdef CONFIG_SYMBIOTIC
 445     if (info->sym_local_state.symcall_state.sym_call_active == 0) {
 446         update_irq_entry_state(info);
 447     }
 448 #else
 449     update_irq_entry_state(info);
 450 #endif
 451
 452
 453     /* ** */
 454
 455     /*
 456       PrintDebug("SVM Entry to CS=%p  rip=%p...\n",
 457       (void *)(addr_t)info->segments.cs.base,
 458       (void *)(addr_t)info->rip);
 459     */
 460
 461 #ifdef CONFIG_SYMBIOTIC
 462     if (info->sym_local_state.symcall_state.sym_call_active == 1) {
 463         if (guest_ctrl->guest_ctrl.V_IRQ == 1) {
 464             V3_Print("!!! Injecting Interrupt during Sym call !!!\n");
 465         }
 466     }
 467 #endif
 468
 469
 470     rdtscll(info->time_state.cached_host_tsc);
 471     guest_ctrl->TSC_OFFSET = info->time_state.guest_tsc - info->time_state.cached_host_tsc;
 472
 473     //V3_Print("Calling v3_svm_launch\n");
 474
 475     v3_svm_launch((vmcb_t *)V3_PAddr(info->vmm_data), &(info->vm_regs), (vmcb_t *)host_vmcbs[info->cpu_id]);
 476
 477     //V3_Print("SVM Returned: Exit Code: %x, guest_rip=%lx\n", (uint32_t)(guest_ctrl->exit_code), (unsigned long)guest_state->rip);
 478
 479
 480     v3_last_exit = (uint32_t)(guest_ctrl->exit_code);
 481
 482     rdtscll(tmp_tsc);
 483
 484     //PrintDebug("SVM Returned\n");
 485
 486     info->num_exits++;
 487
 488     v3_update_time(info, tmp_tsc - info->time_state.cached_host_tsc);
 489
 490
 491     // Save Guest state from VMCB
 492     info->rip = guest_state->rip;
 493     info->vm_regs.rsp = guest_state->rsp;
 494     info->vm_regs.rax = guest_state->rax;
 495
 496     info->cpl = guest_state->cpl;
 497
 498     info->ctrl_regs.cr0 = guest_state->cr0;
 499     info->ctrl_regs.cr2 = guest_state->cr2;
 500     info->ctrl_regs.cr3 = guest_state->cr3;
 501     info->ctrl_regs.cr4 = guest_state->cr4;
 502     info->dbg_regs.dr6 = guest_state->dr6;
 503     info->dbg_regs.dr7 = guest_state->dr7;
 504     info->ctrl_regs.cr8 = guest_ctrl->guest_ctrl.V_TPR;
 505     info->ctrl_regs.rflags = guest_state->rflags;
 506     info->ctrl_regs.efer = guest_state->efer;
 507
 508     v3_get_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
 509     info->cpu_mode = v3_get_vm_cpu_mode(info);
 510     info->mem_mode = v3_get_vm_mem_mode(info);
 511     /* ** */
 512
 513
 514     // save exit info here
 515     exit_code = guest_ctrl->exit_code;
 516     exit_info1 = guest_ctrl->exit_info1;
 517     exit_info2 = guest_ctrl->exit_info2;
 518
 519
 520 #ifdef CONFIG_SYMBIOTIC
 521     if (info->sym_local_state.symcall_state.sym_call_active == 0) {
 522         update_irq_exit_state(info);
 523     }
 524 #else
 525     update_irq_exit_state(info);
 526 #endif
 527
 528
 529     // reenable global interrupts after vm exit
 530     v3_stgi();
 531
 532
 533     // Conditionally yield the CPU if the timeslice has expired
 534     v3_yield_cond(info);
 535
 536
 537     if (v3_handle_svm_exit(info, exit_code, exit_info1, exit_info2) != 0) {
 538         PrintError("Error in SVM exit handler\n");
 539         return -1;
 540     }
 541
 542
 543     return 0;
 544 }
 545
 546
 547 int v3_start_svm_guest(struct guest_info *info) {
 548     //    vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
 549     //  vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 550
 551
 552
 553     PrintDebug("Launching SVM VM (vmcb=%p)\n", (void *)info->vmm_data);
 554     //PrintDebugVMCB((vmcb_t*)(info->vmm_data));
 555
 556     info->vm_info->run_state = VM_RUNNING;
 557     rdtscll(info->yield_start_cycle);
 558
 559
 560     while (1) {
 561         if (v3_svm_enter(info) == -1) {
 562             vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 563             addr_t host_addr;
 564             addr_t linear_addr = 0;
 565
 566             info->vm_info->run_state = VM_ERROR;
 567
 568             V3_Print("SVM ERROR!!\n");
 569
 570             v3_print_guest_state(info);
 571
 572             V3_Print("SVM Exit Code: %p\n", (void *)(addr_t)guest_ctrl->exit_code);
 573
 574             V3_Print("exit_info1 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info1));
 575             V3_Print("exit_info1 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info1)) + 4));
 576
 577             V3_Print("exit_info2 low = 0x%.8x\n", *(uint_t*)&(guest_ctrl->exit_info2));
 578             V3_Print("exit_info2 high = 0x%.8x\n", *(uint_t *)(((uchar_t *)&(guest_ctrl->exit_info2)) + 4));
 579
 580             linear_addr = get_addr_linear(info, info->rip, &(info->segments.cs));
 581
 582             if (info->mem_mode == PHYSICAL_MEM) {
 583                 guest_pa_to_host_va(info, linear_addr, &host_addr);
 584             } else if (info->mem_mode == VIRTUAL_MEM) {
 585                 guest_va_to_host_va(info, linear_addr, &host_addr);
 586             }
 587
 588             V3_Print("Host Address of rip = 0x%p\n", (void *)host_addr);
 589
 590             V3_Print("Instr (15 bytes) at %p:\n", (void *)host_addr);
 591             v3_dump_mem((uint8_t *)host_addr, 15);
 592
 593             v3_print_stack(info);
 594
 595             break;
 596         }
 597
 598 /*
 599         if ((info->num_exits % 5000) == 0) {
 600             V3_Print("SVM Exit number %d\n", (uint32_t)info->num_exits);
 601         }
 602 */
 603
 604     }
 605     return 0;
 606 }
 607
 608
 609
 610
 611
 612 /* Checks machine SVM capability */
 613 /* Implemented from: AMD Arch Manual 3, sect 15.4 */
 614 int v3_is_svm_capable() {
 615     uint_t vm_cr_low = 0, vm_cr_high = 0;
 616     uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
 617
 618     v3_cpuid(CPUID_EXT_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
 619
 620     PrintDebug("CPUID_EXT_FEATURE_IDS_ecx=0x%x\n", ecx);
 621
 622     if ((ecx & CPUID_EXT_FEATURE_IDS_ecx_svm_avail) == 0) {
 623       V3_Print("SVM Not Available\n");
 624       return 0;
 625     }  else {
 626         v3_get_msr(SVM_VM_CR_MSR, &vm_cr_high, &vm_cr_low);
 627
 628         PrintDebug("SVM_VM_CR_MSR = 0x%x 0x%x\n", vm_cr_high, vm_cr_low);
 629
 630         if ((vm_cr_low & SVM_VM_CR_MSR_svmdis) == 1) {
 631             V3_Print("SVM is available but is disabled.\n");
 632
 633             v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
 634
 635             PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=0x%x\n", edx);
 636
 637             if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_svml) == 0) {
 638                 V3_Print("SVM BIOS Disabled, not unlockable\n");
 639             } else {
 640                 V3_Print("SVM is locked with a key\n");
 641             }
 642             return 0;
 643
 644         } else {
 645             V3_Print("SVM is available and  enabled.\n");
 646
 647             v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
 648             PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_eax=0x%x\n", eax);
 649             PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ebx=0x%x\n", ebx);
 650             PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ecx=0x%x\n", ecx);
 651             PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=0x%x\n", edx);
 652
 653             return 1;
 654         }
 655     }
 656 }
 657
 658 static int has_svm_nested_paging() {
 659     uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
 660
 661     v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
 662
 663     //PrintDebug("CPUID_EXT_FEATURE_IDS_edx=0x%x\n", edx);
 664
 665     if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_np) == 0) {
 666         V3_Print("SVM Nested Paging not supported\n");
 667         return 0;
 668     } else {
 669         V3_Print("SVM Nested Paging supported\n");
 670         return 1;
 671     }
 672 }
 673
 674
 675 void v3_init_svm_cpu(int cpu_id) {
 676     reg_ex_t msr;
 677     extern v3_cpu_arch_t v3_cpu_types[];
 678
 679     // Enable SVM on the CPU
 680     v3_get_msr(EFER_MSR, &(msr.e_reg.high), &(msr.e_reg.low));
 681     msr.e_reg.low |= EFER_MSR_svm_enable;
 682     v3_set_msr(EFER_MSR, 0, msr.e_reg.low);
 683
 684     V3_Print("SVM Enabled\n");
 685
 686     // Setup the host state save area
 687     host_vmcbs[cpu_id] = (addr_t)V3_AllocPages(4);
 688
 689     /* 64-BIT-ISSUE */
 690     //  msr.e_reg.high = 0;
 691     //msr.e_reg.low = (uint_t)host_vmcb;
 692     msr.r_reg = host_vmcbs[cpu_id];
 693
 694     PrintDebug("Host State being saved at %p\n", (void *)host_vmcbs[cpu_id]);
 695     v3_set_msr(SVM_VM_HSAVE_PA_MSR, msr.e_reg.high, msr.e_reg.low);
 696
 697
 698     if (has_svm_nested_paging() == 1) {
 699         v3_cpu_types[cpu_id] = V3_SVM_REV3_CPU;
 700     } else {
 701         v3_cpu_types[cpu_id] = V3_SVM_CPU;
 702     }
 703 }
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 757
 758 #if 0
 759 /*
 760  * Test VMSAVE/VMLOAD Latency
 761  */
 762 #define vmsave ".byte 0x0F,0x01,0xDB ; "
 763 #define vmload ".byte 0x0F,0x01,0xDA ; "
 764 {
 765     uint32_t start_lo, start_hi;
 766     uint32_t end_lo, end_hi;
 767     uint64_t start, end;
 768
 769     __asm__ __volatile__ (
 770                           "rdtsc ; "
 771                           "movl %%eax, %%esi ; "
 772                           "movl %%edx, %%edi ; "
 773                           "movq  %%rcx, %%rax ; "
 774                           vmsave
 775                           "rdtsc ; "
 776                           : "=D"(start_hi), "=S"(start_lo), "=a"(end_lo),"=d"(end_hi)
 777                           : "c"(host_vmcb[cpu_id]), "0"(0), "1"(0), "2"(0), "3"(0)
 778                           );
 779
 780     start = start_hi;
 781     start <<= 32;
 782     start += start_lo;
 783
 784     end = end_hi;
 785     end <<= 32;
 786     end += end_lo;
 787
 788     PrintDebug("VMSave Cycle Latency: %d\n", (uint32_t)(end - start));
 789
 790     __asm__ __volatile__ (
 791                           "rdtsc ; "
 792                           "movl %%eax, %%esi ; "
 793                           "movl %%edx, %%edi ; "
 794                           "movq  %%rcx, %%rax ; "
 795                           vmload
 796                           "rdtsc ; "
 797                           : "=D"(start_hi), "=S"(start_lo), "=a"(end_lo),"=d"(end_hi)
 798                               : "c"(host_vmcb[cpu_id]), "0"(0), "1"(0), "2"(0), "3"(0)
 799                               );
 800
 801         start = start_hi;
 802         start <<= 32;
 803         start += start_lo;
 804
 805         end = end_hi;
 806         end <<= 32;
 807         end += end_lo;
 808
 809
 810         PrintDebug("VMLoad Cycle Latency: %d\n", (uint32_t)(end - start));
 811     }
 812     /* End Latency Test */
 813
 814 #endif
 815
 816
 817
 818
 819
 820
 821
 822 #if 0
 823 void Init_VMCB_pe(vmcb_t *vmcb, struct guest_info vm_info) {
 824   vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
 825   vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA(vmcb);
 826   uint_t i = 0;
 827
 828
 829   guest_state->rsp = vm_info.vm_regs.rsp;
 830   guest_state->rip = vm_info.rip;
 831
 832
 833   /* I pretty much just gutted this from TVMM */
 834   /* Note: That means its probably wrong */
 835
 836   // set the segment registers to mirror ours
 837   guest_state->cs.selector = 1<<3;
 838   guest_state->cs.attrib.fields.type = 0xa; // Code segment+read
 839   guest_state->cs.attrib.fields.S = 1;
 840   guest_state->cs.attrib.fields.P = 1;
 841   guest_state->cs.attrib.fields.db = 1;
 842   guest_state->cs.attrib.fields.G = 1;
 843   guest_state->cs.limit = 0xfffff;
 844   guest_state->cs.base = 0;
 845
 846   struct vmcb_selector *segregs [] = {&(guest_state->ss), &(guest_state->ds), &(guest_state->es), &(guest_state->fs), &(guest_state->gs), NULL};
 847   for ( i = 0; segregs[i] != NULL; i++) {
 848     struct vmcb_selector * seg = segregs[i];
 849
 850     seg->selector = 2<<3;
 851     seg->attrib.fields.type = 0x2; // Data Segment+read/write
 852     seg->attrib.fields.S = 1;
 853     seg->attrib.fields.P = 1;
 854     seg->attrib.fields.db = 1;
 855     seg->attrib.fields.G = 1;
 856     seg->limit = 0xfffff;
 857     seg->base = 0;
 858   }
 859
 860
 861   {
 862     /* JRL THIS HAS TO GO */
 863
 864     //    guest_state->tr.selector = GetTR_Selector();
 865     guest_state->tr.attrib.fields.type = 0x9;
 866     guest_state->tr.attrib.fields.P = 1;
 867     // guest_state->tr.limit = GetTR_Limit();
 868     //guest_state->tr.base = GetTR_Base();// - 0x2000;
 869     /* ** */
 870   }
 871
 872
 873   /* ** */
 874
 875
 876   guest_state->efer |= EFER_MSR_svm_enable;
 877   guest_state->rflags = 0x00000002; // The reserved bit is always 1
 878   ctrl_area->svm_instrs.VMRUN = 1;
 879   guest_state->cr0 = 0x00000001;    // PE
 880   ctrl_area->guest_ASID = 1;
 881
 882
 883   //  guest_state->cpl = 0;
 884
 885
 886
 887   // Setup exits
 888
 889   ctrl_area->cr_writes.cr4 = 1;
 890
 891   ctrl_area->exceptions.de = 1;
 892   ctrl_area->exceptions.df = 1;
 893   ctrl_area->exceptions.pf = 1;
 894   ctrl_area->exceptions.ts = 1;
 895   ctrl_area->exceptions.ss = 1;
 896   ctrl_area->exceptions.ac = 1;
 897   ctrl_area->exceptions.mc = 1;
 898   ctrl_area->exceptions.gp = 1;
 899   ctrl_area->exceptions.ud = 1;
 900   ctrl_area->exceptions.np = 1;
 901   ctrl_area->exceptions.of = 1;
 902   ctrl_area->exceptions.nmi = 1;
 903
 904
 905
 906   ctrl_area->instrs.IOIO_PROT = 1;
 907   ctrl_area->IOPM_BASE_PA = (uint_t)V3_AllocPages(3);
 908
 909   {
 910     reg_ex_t tmp_reg;
 911     tmp_reg.r_reg = ctrl_area->IOPM_BASE_PA;
 912     memset((void*)(tmp_reg.e_reg.low), 0xffffffff, PAGE_SIZE * 2);
 913   }
 914
 915   ctrl_area->instrs.INTR = 1;
 916
 917
 918   {
 919     char gdt_buf[6];
 920     char idt_buf[6];
 921
 922     memset(gdt_buf, 0, 6);
 923     memset(idt_buf, 0, 6);
 924
 925
 926     uint_t gdt_base, idt_base;
 927     ushort_t gdt_limit, idt_limit;
 928
 929     GetGDTR(gdt_buf);
 930     gdt_base = *(ulong_t*)((uchar_t*)gdt_buf + 2) & 0xffffffff;
 931     gdt_limit = *(ushort_t*)(gdt_buf) & 0xffff;
 932     PrintDebug("GDT: base: %x, limit: %x\n", gdt_base, gdt_limit);
 933
 934     GetIDTR(idt_buf);
 935     idt_base = *(ulong_t*)(idt_buf + 2) & 0xffffffff;
 936     idt_limit = *(ushort_t*)(idt_buf) & 0xffff;
 937     PrintDebug("IDT: base: %x, limit: %x\n",idt_base, idt_limit);
 938
 939
 940     // gdt_base -= 0x2000;
 941     //idt_base -= 0x2000;
 942
 943     guest_state->gdtr.base = gdt_base;
 944     guest_state->gdtr.limit = gdt_limit;
 945     guest_state->idtr.base = idt_base;
 946     guest_state->idtr.limit = idt_limit;
 947
 948
 949   }
 950
 951
 952   // also determine if CPU supports nested paging
 953   /*
 954   if (vm_info.page_tables) {
 955     //   if (0) {
 956     // Flush the TLB on entries/exits
 957     ctrl_area->TLB_CONTROL = 1;
 958
 959     // Enable Nested Paging
 960     ctrl_area->NP_ENABLE = 1;
 961
 962     PrintDebug("NP_Enable at 0x%x\n", &(ctrl_area->NP_ENABLE));
 963
 964         // Set the Nested Page Table pointer
 965     ctrl_area->N_CR3 |= ((addr_t)vm_info.page_tables & 0xfffff000);
 966
 967
 968     //   ctrl_area->N_CR3 = Get_CR3();
 969     // guest_state->cr3 |= (Get_CR3() & 0xfffff000);
 970
 971     guest_state->g_pat = 0x7040600070406ULL;
 972
 973     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));
 974     PrintDebug("Set Guest CR3: lo: 0x%x  hi: 0x%x\n", (uint_t)*(&(guest_state->cr3)), (uint_t)*((unsigned char *)&(guest_state->cr3) + 4));
 975     // Enable Paging
 976     //    guest_state->cr0 |= 0x80000000;
 977   }
 978   */
 979
 980 }
 981
 982
 983
 984
 985
 986 #endif
 987
 988