1 /*- 2 * Copyright (c) 2011 NetApp, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/types.h> 33 #include <sys/sysctl.h> 34 #include <sys/ioctl.h> 35 #include <sys/mman.h> 36 37 #include <machine/specialreg.h> 38 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <assert.h> 42 #include <string.h> 43 #include <fcntl.h> 44 #include <unistd.h> 45 46 #include <machine/vmm.h> 47 #include <machine/vmm_dev.h> 48 49 #include "vmmapi.h" 50 51 #define GB (1024 * 1024 * 1024UL) 52 53 struct vmctx { 54 int fd; 55 uint32_t lowmem_limit; 56 enum vm_mmap_style vms; 57 size_t lowmem; 58 char *lowmem_addr; 59 size_t highmem; 60 char *highmem_addr; 61 char *name; 62 }; 63 64 #define CREATE(x) sysctlbyname("hw.vmm.create", NULL, NULL, (x), strlen((x))) 65 #define DESTROY(x) sysctlbyname("hw.vmm.destroy", NULL, NULL, (x), strlen((x))) 66 67 static int 68 vm_device_open(const char *name) 69 { 70 int fd, len; 71 char *vmfile; 72 73 len = strlen("/dev/vmm/") + strlen(name) + 1; 74 vmfile = malloc(len); 75 assert(vmfile != NULL); 76 snprintf(vmfile, len, "/dev/vmm/%s", name); 77 78 /* Open the device file */ 79 fd = open(vmfile, O_RDWR, 0); 80 81 free(vmfile); 82 return (fd); 83 } 84 85 int 86 vm_create(const char *name) 87 { 88 89 return (CREATE((char *)name)); 90 } 91 92 struct vmctx * 93 vm_open(const char *name) 94 { 95 struct vmctx *vm; 96 97 vm = malloc(sizeof(struct vmctx) + strlen(name) + 1); 98 assert(vm != NULL); 99 100 vm->fd = -1; 101 vm->lowmem_limit = 3 * GB; 102 vm->name = (char *)(vm + 1); 103 strcpy(vm->name, name); 104 105 if ((vm->fd = vm_device_open(vm->name)) < 0) 106 goto err; 107 108 return (vm); 109 err: 110 vm_destroy(vm); 111 return (NULL); 112 } 113 114 void 115 vm_destroy(struct vmctx *vm) 116 { 117 assert(vm != NULL); 118 119 if (vm->fd >= 0) 120 close(vm->fd); 121 DESTROY(vm->name); 122 123 free(vm); 124 } 125 126 int 127 vm_get_memory_seg(struct vmctx *ctx, vm_paddr_t gpa, size_t *ret_len) 128 { 129 int error; 130 struct vm_memory_segment seg; 131 132 bzero(&seg, sizeof(seg)); 133 seg.gpa = gpa; 134 error = ioctl(ctx->fd, VM_GET_MEMORY_SEG, &seg); 135 *ret_len = seg.len; 136 return (error); 137 } 138 139 uint32_t 140 vm_get_lowmem_limit(struct vmctx *ctx) 141 { 142 143 return (ctx->lowmem_limit); 144 } 145 146 void 147 vm_set_lowmem_limit(struct vmctx *ctx, uint32_t limit) 148 { 149 150 ctx->lowmem_limit = limit; 151 } 152 153 static int 154 setup_memory_segment(struct vmctx *ctx, vm_paddr_t gpa, size_t len, char **addr) 155 { 156 int error; 157 struct vm_memory_segment seg; 158 159 /* 160 * Create and optionally map 'len' bytes of memory at guest 161 * physical address 'gpa' 162 */ 163 bzero(&seg, sizeof(seg)); 164 seg.gpa = gpa; 165 seg.len = len; 166 error = ioctl(ctx->fd, VM_MAP_MEMORY, &seg); 167 if (error == 0 && addr != NULL) { 168 *addr = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, 169 ctx->fd, gpa); 170 } 171 return (error); 172 } 173 174 int 175 vm_setup_memory(struct vmctx *ctx, size_t memsize, enum vm_mmap_style vms) 176 { 177 char **addr; 178 int error; 179 180 /* XXX VM_MMAP_SPARSE not implemented yet */ 181 assert(vms == VM_MMAP_NONE || vms == VM_MMAP_ALL); 182 ctx->vms = vms; 183 184 /* 185 * If 'memsize' cannot fit entirely in the 'lowmem' segment then 186 * create another 'highmem' segment above 4GB for the remainder. 187 */ 188 if (memsize > ctx->lowmem_limit) { 189 ctx->lowmem = ctx->lowmem_limit; 190 ctx->highmem = memsize - ctx->lowmem; 191 } else { 192 ctx->lowmem = memsize; 193 ctx->highmem = 0; 194 } 195 196 if (ctx->lowmem > 0) { 197 addr = (vms == VM_MMAP_ALL) ? &ctx->lowmem_addr : NULL; 198 error = setup_memory_segment(ctx, 0, ctx->lowmem, addr); 199 if (error) 200 return (error); 201 } 202 203 if (ctx->highmem > 0) { 204 addr = (vms == VM_MMAP_ALL) ? &ctx->highmem_addr : NULL; 205 error = setup_memory_segment(ctx, 4*GB, ctx->highmem, addr); 206 if (error) 207 return (error); 208 } 209 210 return (0); 211 } 212 213 void * 214 vm_map_gpa(struct vmctx *ctx, vm_paddr_t gaddr, size_t len) 215 { 216 217 /* XXX VM_MMAP_SPARSE not implemented yet */ 218 assert(ctx->vms == VM_MMAP_ALL); 219 220 if (gaddr < ctx->lowmem && gaddr + len <= ctx->lowmem) 221 return ((void *)(ctx->lowmem_addr + gaddr)); 222 223 if (gaddr >= 4*GB) { 224 gaddr -= 4*GB; 225 if (gaddr < ctx->highmem && gaddr + len <= ctx->highmem) 226 return ((void *)(ctx->highmem_addr + gaddr)); 227 } 228 229 return (NULL); 230 } 231 232 int 233 vm_set_desc(struct vmctx *ctx, int vcpu, int reg, 234 uint64_t base, uint32_t limit, uint32_t access) 235 { 236 int error; 237 struct vm_seg_desc vmsegdesc; 238 239 bzero(&vmsegdesc, sizeof(vmsegdesc)); 240 vmsegdesc.cpuid = vcpu; 241 vmsegdesc.regnum = reg; 242 vmsegdesc.desc.base = base; 243 vmsegdesc.desc.limit = limit; 244 vmsegdesc.desc.access = access; 245 246 error = ioctl(ctx->fd, VM_SET_SEGMENT_DESCRIPTOR, &vmsegdesc); 247 return (error); 248 } 249 250 int 251 vm_get_desc(struct vmctx *ctx, int vcpu, int reg, 252 uint64_t *base, uint32_t *limit, uint32_t *access) 253 { 254 int error; 255 struct vm_seg_desc vmsegdesc; 256 257 bzero(&vmsegdesc, sizeof(vmsegdesc)); 258 vmsegdesc.cpuid = vcpu; 259 vmsegdesc.regnum = reg; 260 261 error = ioctl(ctx->fd, VM_GET_SEGMENT_DESCRIPTOR, &vmsegdesc); 262 if (error == 0) { 263 *base = vmsegdesc.desc.base; 264 *limit = vmsegdesc.desc.limit; 265 *access = vmsegdesc.desc.access; 266 } 267 return (error); 268 } 269 270 int 271 vm_set_register(struct vmctx *ctx, int vcpu, int reg, uint64_t val) 272 { 273 int error; 274 struct vm_register vmreg; 275 276 bzero(&vmreg, sizeof(vmreg)); 277 vmreg.cpuid = vcpu; 278 vmreg.regnum = reg; 279 vmreg.regval = val; 280 281 error = ioctl(ctx->fd, VM_SET_REGISTER, &vmreg); 282 return (error); 283 } 284 285 int 286 vm_get_register(struct vmctx *ctx, int vcpu, int reg, uint64_t *ret_val) 287 { 288 int error; 289 struct vm_register vmreg; 290 291 bzero(&vmreg, sizeof(vmreg)); 292 vmreg.cpuid = vcpu; 293 vmreg.regnum = reg; 294 295 error = ioctl(ctx->fd, VM_GET_REGISTER, &vmreg); 296 *ret_val = vmreg.regval; 297 return (error); 298 } 299 300 int 301 vm_run(struct vmctx *ctx, int vcpu, uint64_t rip, struct vm_exit *vmexit) 302 { 303 int error; 304 struct vm_run vmrun; 305 306 bzero(&vmrun, sizeof(vmrun)); 307 vmrun.cpuid = vcpu; 308 vmrun.rip = rip; 309 310 error = ioctl(ctx->fd, VM_RUN, &vmrun); 311 bcopy(&vmrun.vm_exit, vmexit, sizeof(struct vm_exit)); 312 return (error); 313 } 314 315 static int 316 vm_inject_event_real(struct vmctx *ctx, int vcpu, enum vm_event_type type, 317 int vector, int error_code, int error_code_valid) 318 { 319 struct vm_event ev; 320 321 bzero(&ev, sizeof(ev)); 322 ev.cpuid = vcpu; 323 ev.type = type; 324 ev.vector = vector; 325 ev.error_code = error_code; 326 ev.error_code_valid = error_code_valid; 327 328 return (ioctl(ctx->fd, VM_INJECT_EVENT, &ev)); 329 } 330 331 int 332 vm_inject_event(struct vmctx *ctx, int vcpu, enum vm_event_type type, 333 int vector) 334 { 335 336 return (vm_inject_event_real(ctx, vcpu, type, vector, 0, 0)); 337 } 338 339 int 340 vm_inject_event2(struct vmctx *ctx, int vcpu, enum vm_event_type type, 341 int vector, int error_code) 342 { 343 344 return (vm_inject_event_real(ctx, vcpu, type, vector, error_code, 1)); 345 } 346 347 int 348 vm_apicid2vcpu(struct vmctx *ctx, int apicid) 349 { 350 /* 351 * The apic id associated with the 'vcpu' has the same numerical value 352 * as the 'vcpu' itself. 353 */ 354 return (apicid); 355 } 356 357 int 358 vm_lapic_irq(struct vmctx *ctx, int vcpu, int vector) 359 { 360 struct vm_lapic_irq vmirq; 361 362 bzero(&vmirq, sizeof(vmirq)); 363 vmirq.cpuid = vcpu; 364 vmirq.vector = vector; 365 366 return (ioctl(ctx->fd, VM_LAPIC_IRQ, &vmirq)); 367 } 368 369 int 370 vm_inject_nmi(struct vmctx *ctx, int vcpu) 371 { 372 struct vm_nmi vmnmi; 373 374 bzero(&vmnmi, sizeof(vmnmi)); 375 vmnmi.cpuid = vcpu; 376 377 return (ioctl(ctx->fd, VM_INJECT_NMI, &vmnmi)); 378 } 379 380 static struct { 381 const char *name; 382 int type; 383 } capstrmap[] = { 384 { "hlt_exit", VM_CAP_HALT_EXIT }, 385 { "mtrap_exit", VM_CAP_MTRAP_EXIT }, 386 { "pause_exit", VM_CAP_PAUSE_EXIT }, 387 { "unrestricted_guest", VM_CAP_UNRESTRICTED_GUEST }, 388 { 0 } 389 }; 390 391 int 392 vm_capability_name2type(const char *capname) 393 { 394 int i; 395 396 for (i = 0; capstrmap[i].name != NULL && capname != NULL; i++) { 397 if (strcmp(capstrmap[i].name, capname) == 0) 398 return (capstrmap[i].type); 399 } 400 401 return (-1); 402 } 403 404 const char * 405 vm_capability_type2name(int type) 406 { 407 int i; 408 409 for (i = 0; capstrmap[i].name != NULL; i++) { 410 if (capstrmap[i].type == type) 411 return (capstrmap[i].name); 412 } 413 414 return (NULL); 415 } 416 417 int 418 vm_get_capability(struct vmctx *ctx, int vcpu, enum vm_cap_type cap, 419 int *retval) 420 { 421 int error; 422 struct vm_capability vmcap; 423 424 bzero(&vmcap, sizeof(vmcap)); 425 vmcap.cpuid = vcpu; 426 vmcap.captype = cap; 427 428 error = ioctl(ctx->fd, VM_GET_CAPABILITY, &vmcap); 429 *retval = vmcap.capval; 430 return (error); 431 } 432 433 int 434 vm_set_capability(struct vmctx *ctx, int vcpu, enum vm_cap_type cap, int val) 435 { 436 struct vm_capability vmcap; 437 438 bzero(&vmcap, sizeof(vmcap)); 439 vmcap.cpuid = vcpu; 440 vmcap.captype = cap; 441 vmcap.capval = val; 442 443 return (ioctl(ctx->fd, VM_SET_CAPABILITY, &vmcap)); 444 } 445 446 int 447 vm_assign_pptdev(struct vmctx *ctx, int bus, int slot, int func) 448 { 449 struct vm_pptdev pptdev; 450 451 bzero(&pptdev, sizeof(pptdev)); 452 pptdev.bus = bus; 453 pptdev.slot = slot; 454 pptdev.func = func; 455 456 return (ioctl(ctx->fd, VM_BIND_PPTDEV, &pptdev)); 457 } 458 459 int 460 vm_unassign_pptdev(struct vmctx *ctx, int bus, int slot, int func) 461 { 462 struct vm_pptdev pptdev; 463 464 bzero(&pptdev, sizeof(pptdev)); 465 pptdev.bus = bus; 466 pptdev.slot = slot; 467 pptdev.func = func; 468 469 return (ioctl(ctx->fd, VM_UNBIND_PPTDEV, &pptdev)); 470 } 471 472 int 473 vm_map_pptdev_mmio(struct vmctx *ctx, int bus, int slot, int func, 474 vm_paddr_t gpa, size_t len, vm_paddr_t hpa) 475 { 476 struct vm_pptdev_mmio pptmmio; 477 478 bzero(&pptmmio, sizeof(pptmmio)); 479 pptmmio.bus = bus; 480 pptmmio.slot = slot; 481 pptmmio.func = func; 482 pptmmio.gpa = gpa; 483 pptmmio.len = len; 484 pptmmio.hpa = hpa; 485 486 return (ioctl(ctx->fd, VM_MAP_PPTDEV_MMIO, &pptmmio)); 487 } 488 489 int 490 vm_setup_msi(struct vmctx *ctx, int vcpu, int bus, int slot, int func, 491 int destcpu, int vector, int numvec) 492 { 493 struct vm_pptdev_msi pptmsi; 494 495 bzero(&pptmsi, sizeof(pptmsi)); 496 pptmsi.vcpu = vcpu; 497 pptmsi.bus = bus; 498 pptmsi.slot = slot; 499 pptmsi.func = func; 500 pptmsi.destcpu = destcpu; 501 pptmsi.vector = vector; 502 pptmsi.numvec = numvec; 503 504 return (ioctl(ctx->fd, VM_PPTDEV_MSI, &pptmsi)); 505 } 506 507 int 508 vm_setup_msix(struct vmctx *ctx, int vcpu, int bus, int slot, int func, 509 int idx, uint32_t msg, uint32_t vector_control, uint64_t addr) 510 { 511 struct vm_pptdev_msix pptmsix; 512 513 bzero(&pptmsix, sizeof(pptmsix)); 514 pptmsix.vcpu = vcpu; 515 pptmsix.bus = bus; 516 pptmsix.slot = slot; 517 pptmsix.func = func; 518 pptmsix.idx = idx; 519 pptmsix.msg = msg; 520 pptmsix.addr = addr; 521 pptmsix.vector_control = vector_control; 522 523 return ioctl(ctx->fd, VM_PPTDEV_MSIX, &pptmsix); 524 } 525 526 uint64_t * 527 vm_get_stats(struct vmctx *ctx, int vcpu, struct timeval *ret_tv, 528 int *ret_entries) 529 { 530 int error; 531 532 static struct vm_stats vmstats; 533 534 vmstats.cpuid = vcpu; 535 536 error = ioctl(ctx->fd, VM_STATS, &vmstats); 537 if (error == 0) { 538 if (ret_entries) 539 *ret_entries = vmstats.num_entries; 540 if (ret_tv) 541 *ret_tv = vmstats.tv; 542 return (vmstats.statbuf); 543 } else 544 return (NULL); 545 } 546 547 const char * 548 vm_get_stat_desc(struct vmctx *ctx, int index) 549 { 550 static struct vm_stat_desc statdesc; 551 552 statdesc.index = index; 553 if (ioctl(ctx->fd, VM_STAT_DESC, &statdesc) == 0) 554 return (statdesc.desc); 555 else 556 return (NULL); 557 } 558 559 int 560 vm_get_x2apic_state(struct vmctx *ctx, int vcpu, enum x2apic_state *state) 561 { 562 int error; 563 struct vm_x2apic x2apic; 564 565 bzero(&x2apic, sizeof(x2apic)); 566 x2apic.cpuid = vcpu; 567 568 error = ioctl(ctx->fd, VM_GET_X2APIC_STATE, &x2apic); 569 *state = x2apic.state; 570 return (error); 571 } 572 573 int 574 vm_set_x2apic_state(struct vmctx *ctx, int vcpu, enum x2apic_state state) 575 { 576 int error; 577 struct vm_x2apic x2apic; 578 579 bzero(&x2apic, sizeof(x2apic)); 580 x2apic.cpuid = vcpu; 581 x2apic.state = state; 582 583 error = ioctl(ctx->fd, VM_SET_X2APIC_STATE, &x2apic); 584 585 return (error); 586 } 587 588 /* 589 * From Intel Vol 3a: 590 * Table 9-1. IA-32 Processor States Following Power-up, Reset or INIT 591 */ 592 int 593 vcpu_reset(struct vmctx *vmctx, int vcpu) 594 { 595 int error; 596 uint64_t rflags, rip, cr0, cr4, zero, desc_base, rdx; 597 uint32_t desc_access, desc_limit; 598 uint16_t sel; 599 600 zero = 0; 601 602 rflags = 0x2; 603 error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RFLAGS, rflags); 604 if (error) 605 goto done; 606 607 rip = 0xfff0; 608 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RIP, rip)) != 0) 609 goto done; 610 611 cr0 = CR0_NE; 612 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR0, cr0)) != 0) 613 goto done; 614 615 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR3, zero)) != 0) 616 goto done; 617 618 cr4 = 0; 619 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR4, cr4)) != 0) 620 goto done; 621 622 /* 623 * CS: present, r/w, accessed, 16-bit, byte granularity, usable 624 */ 625 desc_base = 0xffff0000; 626 desc_limit = 0xffff; 627 desc_access = 0x0093; 628 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_CS, 629 desc_base, desc_limit, desc_access); 630 if (error) 631 goto done; 632 633 sel = 0xf000; 634 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CS, sel)) != 0) 635 goto done; 636 637 /* 638 * SS,DS,ES,FS,GS: present, r/w, accessed, 16-bit, byte granularity 639 */ 640 desc_base = 0; 641 desc_limit = 0xffff; 642 desc_access = 0x0093; 643 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_SS, 644 desc_base, desc_limit, desc_access); 645 if (error) 646 goto done; 647 648 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_DS, 649 desc_base, desc_limit, desc_access); 650 if (error) 651 goto done; 652 653 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_ES, 654 desc_base, desc_limit, desc_access); 655 if (error) 656 goto done; 657 658 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_FS, 659 desc_base, desc_limit, desc_access); 660 if (error) 661 goto done; 662 663 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_GS, 664 desc_base, desc_limit, desc_access); 665 if (error) 666 goto done; 667 668 sel = 0; 669 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_SS, sel)) != 0) 670 goto done; 671 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_DS, sel)) != 0) 672 goto done; 673 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_ES, sel)) != 0) 674 goto done; 675 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_FS, sel)) != 0) 676 goto done; 677 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_GS, sel)) != 0) 678 goto done; 679 680 /* General purpose registers */ 681 rdx = 0xf00; 682 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RAX, zero)) != 0) 683 goto done; 684 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RBX, zero)) != 0) 685 goto done; 686 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RCX, zero)) != 0) 687 goto done; 688 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RDX, rdx)) != 0) 689 goto done; 690 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RSI, zero)) != 0) 691 goto done; 692 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RDI, zero)) != 0) 693 goto done; 694 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RBP, zero)) != 0) 695 goto done; 696 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RSP, zero)) != 0) 697 goto done; 698 699 /* GDTR, IDTR */ 700 desc_base = 0; 701 desc_limit = 0xffff; 702 desc_access = 0; 703 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_GDTR, 704 desc_base, desc_limit, desc_access); 705 if (error != 0) 706 goto done; 707 708 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_IDTR, 709 desc_base, desc_limit, desc_access); 710 if (error != 0) 711 goto done; 712 713 /* TR */ 714 desc_base = 0; 715 desc_limit = 0xffff; 716 desc_access = 0x0000008b; 717 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_TR, 0, 0, desc_access); 718 if (error) 719 goto done; 720 721 sel = 0; 722 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_TR, sel)) != 0) 723 goto done; 724 725 /* LDTR */ 726 desc_base = 0; 727 desc_limit = 0xffff; 728 desc_access = 0x00000082; 729 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_LDTR, desc_base, 730 desc_limit, desc_access); 731 if (error) 732 goto done; 733 734 sel = 0; 735 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_LDTR, 0)) != 0) 736 goto done; 737 738 /* XXX cr2, debug registers */ 739 740 error = 0; 741 done: 742 return (error); 743 } 744