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 size_t 127 vmm_get_mem_total(void) 128 { 129 size_t mem_total = 0; 130 size_t oldlen = sizeof(mem_total); 131 int error; 132 error = sysctlbyname("hw.vmm.mem_total", &mem_total, &oldlen, NULL, 0); 133 if (error) 134 return -1; 135 return mem_total; 136 } 137 138 size_t 139 vmm_get_mem_free(void) 140 { 141 size_t mem_free = 0; 142 size_t oldlen = sizeof(mem_free); 143 int error; 144 error = sysctlbyname("hw.vmm.mem_free", &mem_free, &oldlen, NULL, 0); 145 if (error) 146 return -1; 147 return mem_free; 148 } 149 150 int 151 vm_get_memory_seg(struct vmctx *ctx, vm_paddr_t gpa, size_t *ret_len) 152 { 153 int error; 154 struct vm_memory_segment seg; 155 156 bzero(&seg, sizeof(seg)); 157 seg.gpa = gpa; 158 error = ioctl(ctx->fd, VM_GET_MEMORY_SEG, &seg); 159 *ret_len = seg.len; 160 return (error); 161 } 162 163 uint32_t 164 vm_get_lowmem_limit(struct vmctx *ctx) 165 { 166 167 return (ctx->lowmem_limit); 168 } 169 170 void 171 vm_set_lowmem_limit(struct vmctx *ctx, uint32_t limit) 172 { 173 174 ctx->lowmem_limit = limit; 175 } 176 177 static int 178 setup_memory_segment(struct vmctx *ctx, vm_paddr_t gpa, size_t len, char **addr) 179 { 180 int error; 181 struct vm_memory_segment seg; 182 183 /* 184 * Create and optionally map 'len' bytes of memory at guest 185 * physical address 'gpa' 186 */ 187 bzero(&seg, sizeof(seg)); 188 seg.gpa = gpa; 189 seg.len = len; 190 error = ioctl(ctx->fd, VM_MAP_MEMORY, &seg); 191 if (error == 0 && addr != NULL) { 192 *addr = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, 193 ctx->fd, gpa); 194 } 195 return (error); 196 } 197 198 int 199 vm_setup_memory(struct vmctx *ctx, size_t memsize, enum vm_mmap_style vms) 200 { 201 char **addr; 202 int error; 203 204 /* XXX VM_MMAP_SPARSE not implemented yet */ 205 assert(vms == VM_MMAP_NONE || vms == VM_MMAP_ALL); 206 ctx->vms = vms; 207 208 /* 209 * If 'memsize' cannot fit entirely in the 'lowmem' segment then 210 * create another 'highmem' segment above 4GB for the remainder. 211 */ 212 if (memsize > ctx->lowmem_limit) { 213 ctx->lowmem = ctx->lowmem_limit; 214 ctx->highmem = memsize - ctx->lowmem; 215 } else { 216 ctx->lowmem = memsize; 217 ctx->highmem = 0; 218 } 219 220 if (ctx->lowmem > 0) { 221 addr = (vms == VM_MMAP_ALL) ? &ctx->lowmem_addr : NULL; 222 error = setup_memory_segment(ctx, 0, ctx->lowmem, addr); 223 if (error) 224 return (error); 225 } 226 227 if (ctx->highmem > 0) { 228 addr = (vms == VM_MMAP_ALL) ? &ctx->highmem_addr : NULL; 229 error = setup_memory_segment(ctx, 4*GB, ctx->highmem, addr); 230 if (error) 231 return (error); 232 } 233 234 return (0); 235 } 236 237 void * 238 vm_map_gpa(struct vmctx *ctx, vm_paddr_t gaddr, size_t len) 239 { 240 241 /* XXX VM_MMAP_SPARSE not implemented yet */ 242 assert(ctx->vms == VM_MMAP_ALL); 243 244 if (gaddr < ctx->lowmem && gaddr + len <= ctx->lowmem) 245 return ((void *)(ctx->lowmem_addr + gaddr)); 246 247 if (gaddr >= 4*GB) { 248 gaddr -= 4*GB; 249 if (gaddr < ctx->highmem && gaddr + len <= ctx->highmem) 250 return ((void *)(ctx->highmem_addr + gaddr)); 251 } 252 253 return (NULL); 254 } 255 256 int 257 vm_set_desc(struct vmctx *ctx, int vcpu, int reg, 258 uint64_t base, uint32_t limit, uint32_t access) 259 { 260 int error; 261 struct vm_seg_desc vmsegdesc; 262 263 bzero(&vmsegdesc, sizeof(vmsegdesc)); 264 vmsegdesc.cpuid = vcpu; 265 vmsegdesc.regnum = reg; 266 vmsegdesc.desc.base = base; 267 vmsegdesc.desc.limit = limit; 268 vmsegdesc.desc.access = access; 269 270 error = ioctl(ctx->fd, VM_SET_SEGMENT_DESCRIPTOR, &vmsegdesc); 271 return (error); 272 } 273 274 int 275 vm_get_desc(struct vmctx *ctx, int vcpu, int reg, 276 uint64_t *base, uint32_t *limit, uint32_t *access) 277 { 278 int error; 279 struct vm_seg_desc vmsegdesc; 280 281 bzero(&vmsegdesc, sizeof(vmsegdesc)); 282 vmsegdesc.cpuid = vcpu; 283 vmsegdesc.regnum = reg; 284 285 error = ioctl(ctx->fd, VM_GET_SEGMENT_DESCRIPTOR, &vmsegdesc); 286 if (error == 0) { 287 *base = vmsegdesc.desc.base; 288 *limit = vmsegdesc.desc.limit; 289 *access = vmsegdesc.desc.access; 290 } 291 return (error); 292 } 293 294 int 295 vm_set_register(struct vmctx *ctx, int vcpu, int reg, uint64_t val) 296 { 297 int error; 298 struct vm_register vmreg; 299 300 bzero(&vmreg, sizeof(vmreg)); 301 vmreg.cpuid = vcpu; 302 vmreg.regnum = reg; 303 vmreg.regval = val; 304 305 error = ioctl(ctx->fd, VM_SET_REGISTER, &vmreg); 306 return (error); 307 } 308 309 int 310 vm_get_register(struct vmctx *ctx, int vcpu, int reg, uint64_t *ret_val) 311 { 312 int error; 313 struct vm_register vmreg; 314 315 bzero(&vmreg, sizeof(vmreg)); 316 vmreg.cpuid = vcpu; 317 vmreg.regnum = reg; 318 319 error = ioctl(ctx->fd, VM_GET_REGISTER, &vmreg); 320 *ret_val = vmreg.regval; 321 return (error); 322 } 323 324 int 325 vm_run(struct vmctx *ctx, int vcpu, uint64_t rip, struct vm_exit *vmexit) 326 { 327 int error; 328 struct vm_run vmrun; 329 330 bzero(&vmrun, sizeof(vmrun)); 331 vmrun.cpuid = vcpu; 332 vmrun.rip = rip; 333 334 error = ioctl(ctx->fd, VM_RUN, &vmrun); 335 bcopy(&vmrun.vm_exit, vmexit, sizeof(struct vm_exit)); 336 return (error); 337 } 338 339 static int 340 vm_inject_event_real(struct vmctx *ctx, int vcpu, enum vm_event_type type, 341 int vector, int error_code, int error_code_valid) 342 { 343 struct vm_event ev; 344 345 bzero(&ev, sizeof(ev)); 346 ev.cpuid = vcpu; 347 ev.type = type; 348 ev.vector = vector; 349 ev.error_code = error_code; 350 ev.error_code_valid = error_code_valid; 351 352 return (ioctl(ctx->fd, VM_INJECT_EVENT, &ev)); 353 } 354 355 int 356 vm_inject_event(struct vmctx *ctx, int vcpu, enum vm_event_type type, 357 int vector) 358 { 359 360 return (vm_inject_event_real(ctx, vcpu, type, vector, 0, 0)); 361 } 362 363 int 364 vm_inject_event2(struct vmctx *ctx, int vcpu, enum vm_event_type type, 365 int vector, int error_code) 366 { 367 368 return (vm_inject_event_real(ctx, vcpu, type, vector, error_code, 1)); 369 } 370 371 int 372 vm_apicid2vcpu(struct vmctx *ctx, int apicid) 373 { 374 /* 375 * The apic id associated with the 'vcpu' has the same numerical value 376 * as the 'vcpu' itself. 377 */ 378 return (apicid); 379 } 380 381 int 382 vm_lapic_irq(struct vmctx *ctx, int vcpu, int vector) 383 { 384 struct vm_lapic_irq vmirq; 385 386 bzero(&vmirq, sizeof(vmirq)); 387 vmirq.cpuid = vcpu; 388 vmirq.vector = vector; 389 390 return (ioctl(ctx->fd, VM_LAPIC_IRQ, &vmirq)); 391 } 392 393 int 394 vm_inject_nmi(struct vmctx *ctx, int vcpu) 395 { 396 struct vm_nmi vmnmi; 397 398 bzero(&vmnmi, sizeof(vmnmi)); 399 vmnmi.cpuid = vcpu; 400 401 return (ioctl(ctx->fd, VM_INJECT_NMI, &vmnmi)); 402 } 403 404 static struct { 405 const char *name; 406 int type; 407 } capstrmap[] = { 408 { "hlt_exit", VM_CAP_HALT_EXIT }, 409 { "mtrap_exit", VM_CAP_MTRAP_EXIT }, 410 { "pause_exit", VM_CAP_PAUSE_EXIT }, 411 { "unrestricted_guest", VM_CAP_UNRESTRICTED_GUEST }, 412 { 0 } 413 }; 414 415 int 416 vm_capability_name2type(const char *capname) 417 { 418 int i; 419 420 for (i = 0; capstrmap[i].name != NULL && capname != NULL; i++) { 421 if (strcmp(capstrmap[i].name, capname) == 0) 422 return (capstrmap[i].type); 423 } 424 425 return (-1); 426 } 427 428 const char * 429 vm_capability_type2name(int type) 430 { 431 int i; 432 433 for (i = 0; capstrmap[i].name != NULL; i++) { 434 if (capstrmap[i].type == type) 435 return (capstrmap[i].name); 436 } 437 438 return (NULL); 439 } 440 441 int 442 vm_get_capability(struct vmctx *ctx, int vcpu, enum vm_cap_type cap, 443 int *retval) 444 { 445 int error; 446 struct vm_capability vmcap; 447 448 bzero(&vmcap, sizeof(vmcap)); 449 vmcap.cpuid = vcpu; 450 vmcap.captype = cap; 451 452 error = ioctl(ctx->fd, VM_GET_CAPABILITY, &vmcap); 453 *retval = vmcap.capval; 454 return (error); 455 } 456 457 int 458 vm_set_capability(struct vmctx *ctx, int vcpu, enum vm_cap_type cap, int val) 459 { 460 struct vm_capability vmcap; 461 462 bzero(&vmcap, sizeof(vmcap)); 463 vmcap.cpuid = vcpu; 464 vmcap.captype = cap; 465 vmcap.capval = val; 466 467 return (ioctl(ctx->fd, VM_SET_CAPABILITY, &vmcap)); 468 } 469 470 int 471 vm_assign_pptdev(struct vmctx *ctx, int bus, int slot, int func) 472 { 473 struct vm_pptdev pptdev; 474 475 bzero(&pptdev, sizeof(pptdev)); 476 pptdev.bus = bus; 477 pptdev.slot = slot; 478 pptdev.func = func; 479 480 return (ioctl(ctx->fd, VM_BIND_PPTDEV, &pptdev)); 481 } 482 483 int 484 vm_unassign_pptdev(struct vmctx *ctx, int bus, int slot, int func) 485 { 486 struct vm_pptdev pptdev; 487 488 bzero(&pptdev, sizeof(pptdev)); 489 pptdev.bus = bus; 490 pptdev.slot = slot; 491 pptdev.func = func; 492 493 return (ioctl(ctx->fd, VM_UNBIND_PPTDEV, &pptdev)); 494 } 495 496 int 497 vm_map_pptdev_mmio(struct vmctx *ctx, int bus, int slot, int func, 498 vm_paddr_t gpa, size_t len, vm_paddr_t hpa) 499 { 500 struct vm_pptdev_mmio pptmmio; 501 502 bzero(&pptmmio, sizeof(pptmmio)); 503 pptmmio.bus = bus; 504 pptmmio.slot = slot; 505 pptmmio.func = func; 506 pptmmio.gpa = gpa; 507 pptmmio.len = len; 508 pptmmio.hpa = hpa; 509 510 return (ioctl(ctx->fd, VM_MAP_PPTDEV_MMIO, &pptmmio)); 511 } 512 513 int 514 vm_setup_msi(struct vmctx *ctx, int vcpu, int bus, int slot, int func, 515 int destcpu, int vector, int numvec) 516 { 517 struct vm_pptdev_msi pptmsi; 518 519 bzero(&pptmsi, sizeof(pptmsi)); 520 pptmsi.vcpu = vcpu; 521 pptmsi.bus = bus; 522 pptmsi.slot = slot; 523 pptmsi.func = func; 524 pptmsi.destcpu = destcpu; 525 pptmsi.vector = vector; 526 pptmsi.numvec = numvec; 527 528 return (ioctl(ctx->fd, VM_PPTDEV_MSI, &pptmsi)); 529 } 530 531 int 532 vm_setup_msix(struct vmctx *ctx, int vcpu, int bus, int slot, int func, 533 int idx, uint32_t msg, uint32_t vector_control, uint64_t addr) 534 { 535 struct vm_pptdev_msix pptmsix; 536 537 bzero(&pptmsix, sizeof(pptmsix)); 538 pptmsix.vcpu = vcpu; 539 pptmsix.bus = bus; 540 pptmsix.slot = slot; 541 pptmsix.func = func; 542 pptmsix.idx = idx; 543 pptmsix.msg = msg; 544 pptmsix.addr = addr; 545 pptmsix.vector_control = vector_control; 546 547 return ioctl(ctx->fd, VM_PPTDEV_MSIX, &pptmsix); 548 } 549 550 uint64_t * 551 vm_get_stats(struct vmctx *ctx, int vcpu, struct timeval *ret_tv, 552 int *ret_entries) 553 { 554 int error; 555 556 static struct vm_stats vmstats; 557 558 vmstats.cpuid = vcpu; 559 560 error = ioctl(ctx->fd, VM_STATS, &vmstats); 561 if (error == 0) { 562 if (ret_entries) 563 *ret_entries = vmstats.num_entries; 564 if (ret_tv) 565 *ret_tv = vmstats.tv; 566 return (vmstats.statbuf); 567 } else 568 return (NULL); 569 } 570 571 const char * 572 vm_get_stat_desc(struct vmctx *ctx, int index) 573 { 574 static struct vm_stat_desc statdesc; 575 576 statdesc.index = index; 577 if (ioctl(ctx->fd, VM_STAT_DESC, &statdesc) == 0) 578 return (statdesc.desc); 579 else 580 return (NULL); 581 } 582 583 int 584 vm_get_x2apic_state(struct vmctx *ctx, int vcpu, enum x2apic_state *state) 585 { 586 int error; 587 struct vm_x2apic x2apic; 588 589 bzero(&x2apic, sizeof(x2apic)); 590 x2apic.cpuid = vcpu; 591 592 error = ioctl(ctx->fd, VM_GET_X2APIC_STATE, &x2apic); 593 *state = x2apic.state; 594 return (error); 595 } 596 597 int 598 vm_set_x2apic_state(struct vmctx *ctx, int vcpu, enum x2apic_state state) 599 { 600 int error; 601 struct vm_x2apic x2apic; 602 603 bzero(&x2apic, sizeof(x2apic)); 604 x2apic.cpuid = vcpu; 605 x2apic.state = state; 606 607 error = ioctl(ctx->fd, VM_SET_X2APIC_STATE, &x2apic); 608 609 return (error); 610 } 611 612 /* 613 * From Intel Vol 3a: 614 * Table 9-1. IA-32 Processor States Following Power-up, Reset or INIT 615 */ 616 int 617 vcpu_reset(struct vmctx *vmctx, int vcpu) 618 { 619 int error; 620 uint64_t rflags, rip, cr0, cr4, zero, desc_base, rdx; 621 uint32_t desc_access, desc_limit; 622 uint16_t sel; 623 624 zero = 0; 625 626 rflags = 0x2; 627 error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RFLAGS, rflags); 628 if (error) 629 goto done; 630 631 rip = 0xfff0; 632 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RIP, rip)) != 0) 633 goto done; 634 635 cr0 = CR0_NE; 636 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR0, cr0)) != 0) 637 goto done; 638 639 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR3, zero)) != 0) 640 goto done; 641 642 cr4 = 0; 643 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR4, cr4)) != 0) 644 goto done; 645 646 /* 647 * CS: present, r/w, accessed, 16-bit, byte granularity, usable 648 */ 649 desc_base = 0xffff0000; 650 desc_limit = 0xffff; 651 desc_access = 0x0093; 652 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_CS, 653 desc_base, desc_limit, desc_access); 654 if (error) 655 goto done; 656 657 sel = 0xf000; 658 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CS, sel)) != 0) 659 goto done; 660 661 /* 662 * SS,DS,ES,FS,GS: present, r/w, accessed, 16-bit, byte granularity 663 */ 664 desc_base = 0; 665 desc_limit = 0xffff; 666 desc_access = 0x0093; 667 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_SS, 668 desc_base, desc_limit, desc_access); 669 if (error) 670 goto done; 671 672 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_DS, 673 desc_base, desc_limit, desc_access); 674 if (error) 675 goto done; 676 677 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_ES, 678 desc_base, desc_limit, desc_access); 679 if (error) 680 goto done; 681 682 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_FS, 683 desc_base, desc_limit, desc_access); 684 if (error) 685 goto done; 686 687 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_GS, 688 desc_base, desc_limit, desc_access); 689 if (error) 690 goto done; 691 692 sel = 0; 693 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_SS, sel)) != 0) 694 goto done; 695 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_DS, sel)) != 0) 696 goto done; 697 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_ES, sel)) != 0) 698 goto done; 699 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_FS, sel)) != 0) 700 goto done; 701 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_GS, sel)) != 0) 702 goto done; 703 704 /* General purpose registers */ 705 rdx = 0xf00; 706 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RAX, zero)) != 0) 707 goto done; 708 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RBX, zero)) != 0) 709 goto done; 710 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RCX, zero)) != 0) 711 goto done; 712 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RDX, rdx)) != 0) 713 goto done; 714 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RSI, zero)) != 0) 715 goto done; 716 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RDI, zero)) != 0) 717 goto done; 718 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RBP, zero)) != 0) 719 goto done; 720 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RSP, zero)) != 0) 721 goto done; 722 723 /* GDTR, IDTR */ 724 desc_base = 0; 725 desc_limit = 0xffff; 726 desc_access = 0; 727 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_GDTR, 728 desc_base, desc_limit, desc_access); 729 if (error != 0) 730 goto done; 731 732 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_IDTR, 733 desc_base, desc_limit, desc_access); 734 if (error != 0) 735 goto done; 736 737 /* TR */ 738 desc_base = 0; 739 desc_limit = 0xffff; 740 desc_access = 0x0000008b; 741 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_TR, 0, 0, desc_access); 742 if (error) 743 goto done; 744 745 sel = 0; 746 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_TR, sel)) != 0) 747 goto done; 748 749 /* LDTR */ 750 desc_base = 0; 751 desc_limit = 0xffff; 752 desc_access = 0x00000082; 753 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_LDTR, desc_base, 754 desc_limit, desc_access); 755 if (error) 756 goto done; 757 758 sel = 0; 759 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_LDTR, 0)) != 0) 760 goto done; 761 762 /* XXX cr2, debug registers */ 763 764 error = 0; 765 done: 766 return (error); 767 } 768