vmmapi.c revision 241178
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#include "mptable.h" 51 52#define BIOS_ROM_BASE (0xf0000) 53#define BIOS_ROM_SIZE (0x10000) 54 55struct vmctx { 56 int fd; 57 char *name; 58}; 59 60#define CREATE(x) sysctlbyname("hw.vmm.create", NULL, NULL, (x), strlen((x))) 61#define DESTROY(x) sysctlbyname("hw.vmm.destroy", NULL, NULL, (x), strlen((x))) 62 63static int 64vm_device_open(const char *name) 65{ 66 int fd, len; 67 char *vmfile; 68 69 len = strlen("/dev/vmm/") + strlen(name) + 1; 70 vmfile = malloc(len); 71 assert(vmfile != NULL); 72 snprintf(vmfile, len, "/dev/vmm/%s", name); 73 74 /* Open the device file */ 75 fd = open(vmfile, O_RDWR, 0); 76 77 free(vmfile); 78 return (fd); 79} 80 81int 82vm_create(const char *name) 83{ 84 85 return (CREATE((char *)name)); 86} 87 88struct vmctx * 89vm_open(const char *name) 90{ 91 struct vmctx *vm; 92 93 vm = malloc(sizeof(struct vmctx) + strlen(name) + 1); 94 assert(vm != NULL); 95 96 vm->fd = -1; 97 vm->name = (char *)(vm + 1); 98 strcpy(vm->name, name); 99 100 if ((vm->fd = vm_device_open(vm->name)) < 0) 101 goto err; 102 103 return (vm); 104err: 105 vm_destroy(vm); 106 return (NULL); 107} 108 109void 110vm_destroy(struct vmctx *vm) 111{ 112 assert(vm != NULL); 113 114 if (vm->fd >= 0) 115 close(vm->fd); 116 DESTROY(vm->name); 117 118 free(vm); 119} 120 121size_t 122vmm_get_mem_total(void) 123{ 124 size_t mem_total = 0; 125 size_t oldlen = sizeof(mem_total); 126 int error; 127 error = sysctlbyname("hw.vmm.mem_total", &mem_total, &oldlen, NULL, 0); 128 if (error) 129 return -1; 130 return mem_total; 131} 132 133size_t 134vmm_get_mem_free(void) 135{ 136 size_t mem_free = 0; 137 size_t oldlen = sizeof(mem_free); 138 int error; 139 error = sysctlbyname("hw.vmm.mem_free", &mem_free, &oldlen, NULL, 0); 140 if (error) 141 return -1; 142 return mem_free; 143} 144 145int 146vm_get_memory_seg(struct vmctx *ctx, vm_paddr_t gpa, 147 vm_paddr_t *ret_hpa, size_t *ret_len) 148{ 149 int error; 150 struct vm_memory_segment seg; 151 152 bzero(&seg, sizeof(seg)); 153 seg.gpa = gpa; 154 error = ioctl(ctx->fd, VM_GET_MEMORY_SEG, &seg); 155 *ret_len = seg.len; 156 return (error); 157} 158 159int 160vm_setup_memory(struct vmctx *ctx, vm_paddr_t gpa, size_t len, char **mapaddr) 161{ 162 int error; 163 struct vm_memory_segment seg; 164 165 /* 166 * Create and optionally map 'len' bytes of memory at guest 167 * physical address 'gpa' 168 */ 169 bzero(&seg, sizeof(seg)); 170 seg.gpa = gpa; 171 seg.len = len; 172 error = ioctl(ctx->fd, VM_MAP_MEMORY, &seg); 173 if (error == 0 && mapaddr != NULL) { 174 *mapaddr = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, 175 ctx->fd, gpa); 176 } 177 return (error); 178} 179 180char * 181vm_map_memory(struct vmctx *ctx, vm_paddr_t gpa, size_t len) 182{ 183 184 /* Map 'len' bytes of memory at guest physical address 'gpa' */ 185 return ((char *)mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, 186 ctx->fd, gpa)); 187} 188 189int 190vm_set_desc(struct vmctx *ctx, int vcpu, int reg, 191 uint64_t base, uint32_t limit, uint32_t access) 192{ 193 int error; 194 struct vm_seg_desc vmsegdesc; 195 196 bzero(&vmsegdesc, sizeof(vmsegdesc)); 197 vmsegdesc.cpuid = vcpu; 198 vmsegdesc.regnum = reg; 199 vmsegdesc.desc.base = base; 200 vmsegdesc.desc.limit = limit; 201 vmsegdesc.desc.access = access; 202 203 error = ioctl(ctx->fd, VM_SET_SEGMENT_DESCRIPTOR, &vmsegdesc); 204 return (error); 205} 206 207int 208vm_get_desc(struct vmctx *ctx, int vcpu, int reg, 209 uint64_t *base, uint32_t *limit, uint32_t *access) 210{ 211 int error; 212 struct vm_seg_desc vmsegdesc; 213 214 bzero(&vmsegdesc, sizeof(vmsegdesc)); 215 vmsegdesc.cpuid = vcpu; 216 vmsegdesc.regnum = reg; 217 218 error = ioctl(ctx->fd, VM_GET_SEGMENT_DESCRIPTOR, &vmsegdesc); 219 if (error == 0) { 220 *base = vmsegdesc.desc.base; 221 *limit = vmsegdesc.desc.limit; 222 *access = vmsegdesc.desc.access; 223 } 224 return (error); 225} 226 227int 228vm_set_register(struct vmctx *ctx, int vcpu, int reg, uint64_t val) 229{ 230 int error; 231 struct vm_register vmreg; 232 233 bzero(&vmreg, sizeof(vmreg)); 234 vmreg.cpuid = vcpu; 235 vmreg.regnum = reg; 236 vmreg.regval = val; 237 238 error = ioctl(ctx->fd, VM_SET_REGISTER, &vmreg); 239 return (error); 240} 241 242int 243vm_get_register(struct vmctx *ctx, int vcpu, int reg, uint64_t *ret_val) 244{ 245 int error; 246 struct vm_register vmreg; 247 248 bzero(&vmreg, sizeof(vmreg)); 249 vmreg.cpuid = vcpu; 250 vmreg.regnum = reg; 251 252 error = ioctl(ctx->fd, VM_GET_REGISTER, &vmreg); 253 *ret_val = vmreg.regval; 254 return (error); 255} 256 257int 258vm_get_pinning(struct vmctx *ctx, int vcpu, int *host_cpuid) 259{ 260 int error; 261 struct vm_pin vmpin; 262 263 bzero(&vmpin, sizeof(vmpin)); 264 vmpin.vm_cpuid = vcpu; 265 266 error = ioctl(ctx->fd, VM_GET_PINNING, &vmpin); 267 *host_cpuid = vmpin.host_cpuid; 268 return (error); 269} 270 271int 272vm_set_pinning(struct vmctx *ctx, int vcpu, int host_cpuid) 273{ 274 int error; 275 struct vm_pin vmpin; 276 277 bzero(&vmpin, sizeof(vmpin)); 278 vmpin.vm_cpuid = vcpu; 279 vmpin.host_cpuid = host_cpuid; 280 281 error = ioctl(ctx->fd, VM_SET_PINNING, &vmpin); 282 return (error); 283} 284 285int 286vm_run(struct vmctx *ctx, int vcpu, uint64_t rip, struct vm_exit *vmexit) 287{ 288 int error; 289 struct vm_run vmrun; 290 291 bzero(&vmrun, sizeof(vmrun)); 292 vmrun.cpuid = vcpu; 293 vmrun.rip = rip; 294 295 error = ioctl(ctx->fd, VM_RUN, &vmrun); 296 bcopy(&vmrun.vm_exit, vmexit, sizeof(struct vm_exit)); 297 return (error); 298} 299 300static int 301vm_inject_event_real(struct vmctx *ctx, int vcpu, enum vm_event_type type, 302 int vector, int error_code, int error_code_valid) 303{ 304 struct vm_event ev; 305 306 bzero(&ev, sizeof(ev)); 307 ev.cpuid = vcpu; 308 ev.type = type; 309 ev.vector = vector; 310 ev.error_code = error_code; 311 ev.error_code_valid = error_code_valid; 312 313 return (ioctl(ctx->fd, VM_INJECT_EVENT, &ev)); 314} 315 316int 317vm_inject_event(struct vmctx *ctx, int vcpu, enum vm_event_type type, 318 int vector) 319{ 320 321 return (vm_inject_event_real(ctx, vcpu, type, vector, 0, 0)); 322} 323 324int 325vm_inject_event2(struct vmctx *ctx, int vcpu, enum vm_event_type type, 326 int vector, int error_code) 327{ 328 329 return (vm_inject_event_real(ctx, vcpu, type, vector, error_code, 1)); 330} 331 332int 333vm_build_tables(struct vmctx *ctxt, int ncpu, int ioapic, 334 void *oemtbl, int oemtblsz) 335{ 336 337 return (vm_build_mptable(ctxt, BIOS_ROM_BASE, BIOS_ROM_SIZE, ncpu, 338 ioapic, oemtbl, oemtblsz)); 339} 340 341int 342vm_apicid2vcpu(struct vmctx *ctx, int apicid) 343{ 344 /* 345 * The apic id associated with the 'vcpu' has the same numerical value 346 * as the 'vcpu' itself. 347 */ 348 return (apicid); 349} 350 351int 352vm_lapic_irq(struct vmctx *ctx, int vcpu, int vector) 353{ 354 struct vm_lapic_irq vmirq; 355 356 bzero(&vmirq, sizeof(vmirq)); 357 vmirq.cpuid = vcpu; 358 vmirq.vector = vector; 359 360 return (ioctl(ctx->fd, VM_LAPIC_IRQ, &vmirq)); 361} 362 363int 364vm_inject_nmi(struct vmctx *ctx, int vcpu) 365{ 366 struct vm_nmi vmnmi; 367 368 bzero(&vmnmi, sizeof(vmnmi)); 369 vmnmi.cpuid = vcpu; 370 371 return (ioctl(ctx->fd, VM_INJECT_NMI, &vmnmi)); 372} 373 374int 375vm_capability_name2type(const char *capname) 376{ 377 int i; 378 379 static struct { 380 const char *name; 381 int type; 382 } capstrmap[] = { 383 { "hlt_exit", VM_CAP_HALT_EXIT }, 384 { "mtrap_exit", VM_CAP_MTRAP_EXIT }, 385 { "pause_exit", VM_CAP_PAUSE_EXIT }, 386 { "unrestricted_guest", VM_CAP_UNRESTRICTED_GUEST }, 387 { 0 } 388 }; 389 390 for (i = 0; capstrmap[i].name != NULL && capname != NULL; i++) { 391 if (strcmp(capstrmap[i].name, capname) == 0) 392 return (capstrmap[i].type); 393 } 394 395 return (-1); 396} 397 398int 399vm_get_capability(struct vmctx *ctx, int vcpu, enum vm_cap_type cap, 400 int *retval) 401{ 402 int error; 403 struct vm_capability vmcap; 404 405 bzero(&vmcap, sizeof(vmcap)); 406 vmcap.cpuid = vcpu; 407 vmcap.captype = cap; 408 409 error = ioctl(ctx->fd, VM_GET_CAPABILITY, &vmcap); 410 *retval = vmcap.capval; 411 return (error); 412} 413 414int 415vm_set_capability(struct vmctx *ctx, int vcpu, enum vm_cap_type cap, int val) 416{ 417 struct vm_capability vmcap; 418 419 bzero(&vmcap, sizeof(vmcap)); 420 vmcap.cpuid = vcpu; 421 vmcap.captype = cap; 422 vmcap.capval = val; 423 424 return (ioctl(ctx->fd, VM_SET_CAPABILITY, &vmcap)); 425} 426 427int 428vm_assign_pptdev(struct vmctx *ctx, int bus, int slot, int func) 429{ 430 struct vm_pptdev pptdev; 431 432 bzero(&pptdev, sizeof(pptdev)); 433 pptdev.bus = bus; 434 pptdev.slot = slot; 435 pptdev.func = func; 436 437 return (ioctl(ctx->fd, VM_BIND_PPTDEV, &pptdev)); 438} 439 440int 441vm_unassign_pptdev(struct vmctx *ctx, int bus, int slot, int func) 442{ 443 struct vm_pptdev pptdev; 444 445 bzero(&pptdev, sizeof(pptdev)); 446 pptdev.bus = bus; 447 pptdev.slot = slot; 448 pptdev.func = func; 449 450 return (ioctl(ctx->fd, VM_UNBIND_PPTDEV, &pptdev)); 451} 452 453int 454vm_map_pptdev_mmio(struct vmctx *ctx, int bus, int slot, int func, 455 vm_paddr_t gpa, size_t len, vm_paddr_t hpa) 456{ 457 struct vm_pptdev_mmio pptmmio; 458 459 bzero(&pptmmio, sizeof(pptmmio)); 460 pptmmio.bus = bus; 461 pptmmio.slot = slot; 462 pptmmio.func = func; 463 pptmmio.gpa = gpa; 464 pptmmio.len = len; 465 pptmmio.hpa = hpa; 466 467 return (ioctl(ctx->fd, VM_MAP_PPTDEV_MMIO, &pptmmio)); 468} 469 470int 471vm_setup_msi(struct vmctx *ctx, int vcpu, int bus, int slot, int func, 472 int destcpu, int vector, int numvec) 473{ 474 struct vm_pptdev_msi pptmsi; 475 476 bzero(&pptmsi, sizeof(pptmsi)); 477 pptmsi.vcpu = vcpu; 478 pptmsi.bus = bus; 479 pptmsi.slot = slot; 480 pptmsi.func = func; 481 pptmsi.destcpu = destcpu; 482 pptmsi.vector = vector; 483 pptmsi.numvec = numvec; 484 485 return (ioctl(ctx->fd, VM_PPTDEV_MSI, &pptmsi)); 486} 487 488int 489vm_setup_msix(struct vmctx *ctx, int vcpu, int bus, int slot, int func, 490 int idx, uint32_t msg, uint32_t vector_control, uint64_t addr) 491{ 492 struct vm_pptdev_msix pptmsix; 493 494 bzero(&pptmsix, sizeof(pptmsix)); 495 pptmsix.vcpu = vcpu; 496 pptmsix.bus = bus; 497 pptmsix.slot = slot; 498 pptmsix.func = func; 499 pptmsix.idx = idx; 500 pptmsix.msg = msg; 501 pptmsix.addr = addr; 502 pptmsix.vector_control = vector_control; 503 504 return ioctl(ctx->fd, VM_PPTDEV_MSIX, &pptmsix); 505} 506 507uint64_t * 508vm_get_stats(struct vmctx *ctx, int vcpu, struct timeval *ret_tv, 509 int *ret_entries) 510{ 511 int error; 512 513 static struct vm_stats vmstats; 514 515 vmstats.cpuid = vcpu; 516 517 error = ioctl(ctx->fd, VM_STATS, &vmstats); 518 if (error == 0) { 519 if (ret_entries) 520 *ret_entries = vmstats.num_entries; 521 if (ret_tv) 522 *ret_tv = vmstats.tv; 523 return (vmstats.statbuf); 524 } else 525 return (NULL); 526} 527 528const char * 529vm_get_stat_desc(struct vmctx *ctx, int index) 530{ 531 static struct vm_stat_desc statdesc; 532 533 statdesc.index = index; 534 if (ioctl(ctx->fd, VM_STAT_DESC, &statdesc) == 0) 535 return (statdesc.desc); 536 else 537 return (NULL); 538} 539 540int 541vm_get_x2apic_state(struct vmctx *ctx, int vcpu, enum x2apic_state *state) 542{ 543 int error; 544 struct vm_x2apic x2apic; 545 546 bzero(&x2apic, sizeof(x2apic)); 547 x2apic.cpuid = vcpu; 548 549 error = ioctl(ctx->fd, VM_GET_X2APIC_STATE, &x2apic); 550 *state = x2apic.state; 551 return (error); 552} 553 554int 555vm_set_x2apic_state(struct vmctx *ctx, int vcpu, enum x2apic_state state) 556{ 557 int error; 558 struct vm_x2apic x2apic; 559 560 bzero(&x2apic, sizeof(x2apic)); 561 x2apic.cpuid = vcpu; 562 x2apic.state = state; 563 564 error = ioctl(ctx->fd, VM_SET_X2APIC_STATE, &x2apic); 565 566 return (error); 567} 568 569/* 570 * From Intel Vol 3a: 571 * Table 9-1. IA-32 Processor States Following Power-up, Reset or INIT 572 */ 573int 574vcpu_reset(struct vmctx *vmctx, int vcpu) 575{ 576 int error; 577 uint64_t rflags, rip, cr0, cr4, zero, desc_base, rdx; 578 uint32_t desc_access, desc_limit; 579 uint16_t sel; 580 581 zero = 0; 582 583 rflags = 0x2; 584 error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RFLAGS, rflags); 585 if (error) 586 goto done; 587 588 rip = 0xfff0; 589 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RIP, rip)) != 0) 590 goto done; 591 592 cr0 = CR0_NE; 593 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR0, cr0)) != 0) 594 goto done; 595 596 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR3, zero)) != 0) 597 goto done; 598 599 cr4 = 0; 600 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR4, cr4)) != 0) 601 goto done; 602 603 /* 604 * CS: present, r/w, accessed, 16-bit, byte granularity, usable 605 */ 606 desc_base = 0xffff0000; 607 desc_limit = 0xffff; 608 desc_access = 0x0093; 609 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_CS, 610 desc_base, desc_limit, desc_access); 611 if (error) 612 goto done; 613 614 sel = 0xf000; 615 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CS, sel)) != 0) 616 goto done; 617 618 /* 619 * SS,DS,ES,FS,GS: present, r/w, accessed, 16-bit, byte granularity 620 */ 621 desc_base = 0; 622 desc_limit = 0xffff; 623 desc_access = 0x0093; 624 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_SS, 625 desc_base, desc_limit, desc_access); 626 if (error) 627 goto done; 628 629 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_DS, 630 desc_base, desc_limit, desc_access); 631 if (error) 632 goto done; 633 634 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_ES, 635 desc_base, desc_limit, desc_access); 636 if (error) 637 goto done; 638 639 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_FS, 640 desc_base, desc_limit, desc_access); 641 if (error) 642 goto done; 643 644 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_GS, 645 desc_base, desc_limit, desc_access); 646 if (error) 647 goto done; 648 649 sel = 0; 650 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_SS, sel)) != 0) 651 goto done; 652 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_DS, sel)) != 0) 653 goto done; 654 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_ES, sel)) != 0) 655 goto done; 656 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_FS, sel)) != 0) 657 goto done; 658 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_GS, sel)) != 0) 659 goto done; 660 661 /* General purpose registers */ 662 rdx = 0xf00; 663 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RAX, zero)) != 0) 664 goto done; 665 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RBX, zero)) != 0) 666 goto done; 667 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RCX, zero)) != 0) 668 goto done; 669 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RDX, rdx)) != 0) 670 goto done; 671 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RSI, zero)) != 0) 672 goto done; 673 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RDI, zero)) != 0) 674 goto done; 675 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RBP, zero)) != 0) 676 goto done; 677 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RSP, zero)) != 0) 678 goto done; 679 680 /* GDTR, IDTR */ 681 desc_base = 0; 682 desc_limit = 0xffff; 683 desc_access = 0; 684 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_GDTR, 685 desc_base, desc_limit, desc_access); 686 if (error != 0) 687 goto done; 688 689 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_IDTR, 690 desc_base, desc_limit, desc_access); 691 if (error != 0) 692 goto done; 693 694 /* TR */ 695 desc_base = 0; 696 desc_limit = 0xffff; 697 desc_access = 0x0000008b; 698 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_TR, 0, 0, desc_access); 699 if (error) 700 goto done; 701 702 sel = 0; 703 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_TR, sel)) != 0) 704 goto done; 705 706 /* LDTR */ 707 desc_base = 0; 708 desc_limit = 0xffff; 709 desc_access = 0x00000082; 710 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_LDTR, desc_base, 711 desc_limit, desc_access); 712 if (error) 713 goto done; 714 715 sel = 0; 716 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_LDTR, 0)) != 0) 717 goto done; 718 719 /* XXX cr2, debug registers */ 720 721 error = 0; 722done: 723 return (error); 724} 725