vmmapi.c revision 256072
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: head/lib/libvmmapi/vmmapi.c 256072 2013-10-05 21:22:35Z neel $ 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: head/lib/libvmmapi/vmmapi.c 256072 2013-10-05 21:22:35Z neel $"); 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 53struct 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 67static int 68vm_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 85int 86vm_create(const char *name) 87{ 88 89 return (CREATE((char *)name)); 90} 91 92struct vmctx * 93vm_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); 109err: 110 vm_destroy(vm); 111 return (NULL); 112} 113 114void 115vm_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 126int 127vm_get_memory_seg(struct vmctx *ctx, vm_paddr_t gpa, size_t *ret_len, 128 int *wired) 129{ 130 int error; 131 struct vm_memory_segment seg; 132 133 bzero(&seg, sizeof(seg)); 134 seg.gpa = gpa; 135 error = ioctl(ctx->fd, VM_GET_MEMORY_SEG, &seg); 136 *ret_len = seg.len; 137 if (wired != NULL) 138 *wired = seg.wired; 139 return (error); 140} 141 142uint32_t 143vm_get_lowmem_limit(struct vmctx *ctx) 144{ 145 146 return (ctx->lowmem_limit); 147} 148 149void 150vm_set_lowmem_limit(struct vmctx *ctx, uint32_t limit) 151{ 152 153 ctx->lowmem_limit = limit; 154} 155 156static int 157setup_memory_segment(struct vmctx *ctx, vm_paddr_t gpa, size_t len, char **addr) 158{ 159 int error; 160 struct vm_memory_segment seg; 161 162 /* 163 * Create and optionally map 'len' bytes of memory at guest 164 * physical address 'gpa' 165 */ 166 bzero(&seg, sizeof(seg)); 167 seg.gpa = gpa; 168 seg.len = len; 169 error = ioctl(ctx->fd, VM_MAP_MEMORY, &seg); 170 if (error == 0 && addr != NULL) { 171 *addr = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, 172 ctx->fd, gpa); 173 } 174 return (error); 175} 176 177int 178vm_setup_memory(struct vmctx *ctx, size_t memsize, enum vm_mmap_style vms) 179{ 180 char **addr; 181 int error; 182 183 /* XXX VM_MMAP_SPARSE not implemented yet */ 184 assert(vms == VM_MMAP_NONE || vms == VM_MMAP_ALL); 185 ctx->vms = vms; 186 187 /* 188 * If 'memsize' cannot fit entirely in the 'lowmem' segment then 189 * create another 'highmem' segment above 4GB for the remainder. 190 */ 191 if (memsize > ctx->lowmem_limit) { 192 ctx->lowmem = ctx->lowmem_limit; 193 ctx->highmem = memsize - ctx->lowmem; 194 } else { 195 ctx->lowmem = memsize; 196 ctx->highmem = 0; 197 } 198 199 if (ctx->lowmem > 0) { 200 addr = (vms == VM_MMAP_ALL) ? &ctx->lowmem_addr : NULL; 201 error = setup_memory_segment(ctx, 0, ctx->lowmem, addr); 202 if (error) 203 return (error); 204 } 205 206 if (ctx->highmem > 0) { 207 addr = (vms == VM_MMAP_ALL) ? &ctx->highmem_addr : NULL; 208 error = setup_memory_segment(ctx, 4*GB, ctx->highmem, addr); 209 if (error) 210 return (error); 211 } 212 213 return (0); 214} 215 216void * 217vm_map_gpa(struct vmctx *ctx, vm_paddr_t gaddr, size_t len) 218{ 219 220 /* XXX VM_MMAP_SPARSE not implemented yet */ 221 assert(ctx->vms == VM_MMAP_ALL); 222 223 if (gaddr < ctx->lowmem && gaddr + len <= ctx->lowmem) 224 return ((void *)(ctx->lowmem_addr + gaddr)); 225 226 if (gaddr >= 4*GB) { 227 gaddr -= 4*GB; 228 if (gaddr < ctx->highmem && gaddr + len <= ctx->highmem) 229 return ((void *)(ctx->highmem_addr + gaddr)); 230 } 231 232 return (NULL); 233} 234 235int 236vm_set_desc(struct vmctx *ctx, int vcpu, int reg, 237 uint64_t base, uint32_t limit, uint32_t access) 238{ 239 int error; 240 struct vm_seg_desc vmsegdesc; 241 242 bzero(&vmsegdesc, sizeof(vmsegdesc)); 243 vmsegdesc.cpuid = vcpu; 244 vmsegdesc.regnum = reg; 245 vmsegdesc.desc.base = base; 246 vmsegdesc.desc.limit = limit; 247 vmsegdesc.desc.access = access; 248 249 error = ioctl(ctx->fd, VM_SET_SEGMENT_DESCRIPTOR, &vmsegdesc); 250 return (error); 251} 252 253int 254vm_get_desc(struct vmctx *ctx, int vcpu, int reg, 255 uint64_t *base, uint32_t *limit, uint32_t *access) 256{ 257 int error; 258 struct vm_seg_desc vmsegdesc; 259 260 bzero(&vmsegdesc, sizeof(vmsegdesc)); 261 vmsegdesc.cpuid = vcpu; 262 vmsegdesc.regnum = reg; 263 264 error = ioctl(ctx->fd, VM_GET_SEGMENT_DESCRIPTOR, &vmsegdesc); 265 if (error == 0) { 266 *base = vmsegdesc.desc.base; 267 *limit = vmsegdesc.desc.limit; 268 *access = vmsegdesc.desc.access; 269 } 270 return (error); 271} 272 273int 274vm_set_register(struct vmctx *ctx, int vcpu, int reg, uint64_t val) 275{ 276 int error; 277 struct vm_register vmreg; 278 279 bzero(&vmreg, sizeof(vmreg)); 280 vmreg.cpuid = vcpu; 281 vmreg.regnum = reg; 282 vmreg.regval = val; 283 284 error = ioctl(ctx->fd, VM_SET_REGISTER, &vmreg); 285 return (error); 286} 287 288int 289vm_get_register(struct vmctx *ctx, int vcpu, int reg, uint64_t *ret_val) 290{ 291 int error; 292 struct vm_register vmreg; 293 294 bzero(&vmreg, sizeof(vmreg)); 295 vmreg.cpuid = vcpu; 296 vmreg.regnum = reg; 297 298 error = ioctl(ctx->fd, VM_GET_REGISTER, &vmreg); 299 *ret_val = vmreg.regval; 300 return (error); 301} 302 303int 304vm_run(struct vmctx *ctx, int vcpu, uint64_t rip, struct vm_exit *vmexit) 305{ 306 int error; 307 struct vm_run vmrun; 308 309 bzero(&vmrun, sizeof(vmrun)); 310 vmrun.cpuid = vcpu; 311 vmrun.rip = rip; 312 313 error = ioctl(ctx->fd, VM_RUN, &vmrun); 314 bcopy(&vmrun.vm_exit, vmexit, sizeof(struct vm_exit)); 315 return (error); 316} 317 318static int 319vm_inject_event_real(struct vmctx *ctx, int vcpu, enum vm_event_type type, 320 int vector, int error_code, int error_code_valid) 321{ 322 struct vm_event ev; 323 324 bzero(&ev, sizeof(ev)); 325 ev.cpuid = vcpu; 326 ev.type = type; 327 ev.vector = vector; 328 ev.error_code = error_code; 329 ev.error_code_valid = error_code_valid; 330 331 return (ioctl(ctx->fd, VM_INJECT_EVENT, &ev)); 332} 333 334int 335vm_inject_event(struct vmctx *ctx, int vcpu, enum vm_event_type type, 336 int vector) 337{ 338 339 return (vm_inject_event_real(ctx, vcpu, type, vector, 0, 0)); 340} 341 342int 343vm_inject_event2(struct vmctx *ctx, int vcpu, enum vm_event_type type, 344 int vector, int error_code) 345{ 346 347 return (vm_inject_event_real(ctx, vcpu, type, vector, error_code, 1)); 348} 349 350int 351vm_apicid2vcpu(struct vmctx *ctx, int apicid) 352{ 353 /* 354 * The apic id associated with the 'vcpu' has the same numerical value 355 * as the 'vcpu' itself. 356 */ 357 return (apicid); 358} 359 360int 361vm_lapic_irq(struct vmctx *ctx, int vcpu, int vector) 362{ 363 struct vm_lapic_irq vmirq; 364 365 bzero(&vmirq, sizeof(vmirq)); 366 vmirq.cpuid = vcpu; 367 vmirq.vector = vector; 368 369 return (ioctl(ctx->fd, VM_LAPIC_IRQ, &vmirq)); 370} 371 372int 373vm_inject_nmi(struct vmctx *ctx, int vcpu) 374{ 375 struct vm_nmi vmnmi; 376 377 bzero(&vmnmi, sizeof(vmnmi)); 378 vmnmi.cpuid = vcpu; 379 380 return (ioctl(ctx->fd, VM_INJECT_NMI, &vmnmi)); 381} 382 383static struct { 384 const char *name; 385 int type; 386} capstrmap[] = { 387 { "hlt_exit", VM_CAP_HALT_EXIT }, 388 { "mtrap_exit", VM_CAP_MTRAP_EXIT }, 389 { "pause_exit", VM_CAP_PAUSE_EXIT }, 390 { "unrestricted_guest", VM_CAP_UNRESTRICTED_GUEST }, 391 { 0 } 392}; 393 394int 395vm_capability_name2type(const char *capname) 396{ 397 int i; 398 399 for (i = 0; capstrmap[i].name != NULL && capname != NULL; i++) { 400 if (strcmp(capstrmap[i].name, capname) == 0) 401 return (capstrmap[i].type); 402 } 403 404 return (-1); 405} 406 407const char * 408vm_capability_type2name(int type) 409{ 410 int i; 411 412 for (i = 0; capstrmap[i].name != NULL; i++) { 413 if (capstrmap[i].type == type) 414 return (capstrmap[i].name); 415 } 416 417 return (NULL); 418} 419 420int 421vm_get_capability(struct vmctx *ctx, int vcpu, enum vm_cap_type cap, 422 int *retval) 423{ 424 int error; 425 struct vm_capability vmcap; 426 427 bzero(&vmcap, sizeof(vmcap)); 428 vmcap.cpuid = vcpu; 429 vmcap.captype = cap; 430 431 error = ioctl(ctx->fd, VM_GET_CAPABILITY, &vmcap); 432 *retval = vmcap.capval; 433 return (error); 434} 435 436int 437vm_set_capability(struct vmctx *ctx, int vcpu, enum vm_cap_type cap, int val) 438{ 439 struct vm_capability vmcap; 440 441 bzero(&vmcap, sizeof(vmcap)); 442 vmcap.cpuid = vcpu; 443 vmcap.captype = cap; 444 vmcap.capval = val; 445 446 return (ioctl(ctx->fd, VM_SET_CAPABILITY, &vmcap)); 447} 448 449int 450vm_assign_pptdev(struct vmctx *ctx, int bus, int slot, int func) 451{ 452 struct vm_pptdev pptdev; 453 454 bzero(&pptdev, sizeof(pptdev)); 455 pptdev.bus = bus; 456 pptdev.slot = slot; 457 pptdev.func = func; 458 459 return (ioctl(ctx->fd, VM_BIND_PPTDEV, &pptdev)); 460} 461 462int 463vm_unassign_pptdev(struct vmctx *ctx, int bus, int slot, int func) 464{ 465 struct vm_pptdev pptdev; 466 467 bzero(&pptdev, sizeof(pptdev)); 468 pptdev.bus = bus; 469 pptdev.slot = slot; 470 pptdev.func = func; 471 472 return (ioctl(ctx->fd, VM_UNBIND_PPTDEV, &pptdev)); 473} 474 475int 476vm_map_pptdev_mmio(struct vmctx *ctx, int bus, int slot, int func, 477 vm_paddr_t gpa, size_t len, vm_paddr_t hpa) 478{ 479 struct vm_pptdev_mmio pptmmio; 480 481 bzero(&pptmmio, sizeof(pptmmio)); 482 pptmmio.bus = bus; 483 pptmmio.slot = slot; 484 pptmmio.func = func; 485 pptmmio.gpa = gpa; 486 pptmmio.len = len; 487 pptmmio.hpa = hpa; 488 489 return (ioctl(ctx->fd, VM_MAP_PPTDEV_MMIO, &pptmmio)); 490} 491 492int 493vm_setup_msi(struct vmctx *ctx, int vcpu, int bus, int slot, int func, 494 int destcpu, int vector, int numvec) 495{ 496 struct vm_pptdev_msi pptmsi; 497 498 bzero(&pptmsi, sizeof(pptmsi)); 499 pptmsi.vcpu = vcpu; 500 pptmsi.bus = bus; 501 pptmsi.slot = slot; 502 pptmsi.func = func; 503 pptmsi.destcpu = destcpu; 504 pptmsi.vector = vector; 505 pptmsi.numvec = numvec; 506 507 return (ioctl(ctx->fd, VM_PPTDEV_MSI, &pptmsi)); 508} 509 510int 511vm_setup_msix(struct vmctx *ctx, int vcpu, int bus, int slot, int func, 512 int idx, uint32_t msg, uint32_t vector_control, uint64_t addr) 513{ 514 struct vm_pptdev_msix pptmsix; 515 516 bzero(&pptmsix, sizeof(pptmsix)); 517 pptmsix.vcpu = vcpu; 518 pptmsix.bus = bus; 519 pptmsix.slot = slot; 520 pptmsix.func = func; 521 pptmsix.idx = idx; 522 pptmsix.msg = msg; 523 pptmsix.addr = addr; 524 pptmsix.vector_control = vector_control; 525 526 return ioctl(ctx->fd, VM_PPTDEV_MSIX, &pptmsix); 527} 528 529uint64_t * 530vm_get_stats(struct vmctx *ctx, int vcpu, struct timeval *ret_tv, 531 int *ret_entries) 532{ 533 int error; 534 535 static struct vm_stats vmstats; 536 537 vmstats.cpuid = vcpu; 538 539 error = ioctl(ctx->fd, VM_STATS, &vmstats); 540 if (error == 0) { 541 if (ret_entries) 542 *ret_entries = vmstats.num_entries; 543 if (ret_tv) 544 *ret_tv = vmstats.tv; 545 return (vmstats.statbuf); 546 } else 547 return (NULL); 548} 549 550const char * 551vm_get_stat_desc(struct vmctx *ctx, int index) 552{ 553 static struct vm_stat_desc statdesc; 554 555 statdesc.index = index; 556 if (ioctl(ctx->fd, VM_STAT_DESC, &statdesc) == 0) 557 return (statdesc.desc); 558 else 559 return (NULL); 560} 561 562int 563vm_get_x2apic_state(struct vmctx *ctx, int vcpu, enum x2apic_state *state) 564{ 565 int error; 566 struct vm_x2apic x2apic; 567 568 bzero(&x2apic, sizeof(x2apic)); 569 x2apic.cpuid = vcpu; 570 571 error = ioctl(ctx->fd, VM_GET_X2APIC_STATE, &x2apic); 572 *state = x2apic.state; 573 return (error); 574} 575 576int 577vm_set_x2apic_state(struct vmctx *ctx, int vcpu, enum x2apic_state state) 578{ 579 int error; 580 struct vm_x2apic x2apic; 581 582 bzero(&x2apic, sizeof(x2apic)); 583 x2apic.cpuid = vcpu; 584 x2apic.state = state; 585 586 error = ioctl(ctx->fd, VM_SET_X2APIC_STATE, &x2apic); 587 588 return (error); 589} 590 591/* 592 * From Intel Vol 3a: 593 * Table 9-1. IA-32 Processor States Following Power-up, Reset or INIT 594 */ 595int 596vcpu_reset(struct vmctx *vmctx, int vcpu) 597{ 598 int error; 599 uint64_t rflags, rip, cr0, cr4, zero, desc_base, rdx; 600 uint32_t desc_access, desc_limit; 601 uint16_t sel; 602 603 zero = 0; 604 605 rflags = 0x2; 606 error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RFLAGS, rflags); 607 if (error) 608 goto done; 609 610 rip = 0xfff0; 611 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RIP, rip)) != 0) 612 goto done; 613 614 cr0 = CR0_NE; 615 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR0, cr0)) != 0) 616 goto done; 617 618 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR3, zero)) != 0) 619 goto done; 620 621 cr4 = 0; 622 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CR4, cr4)) != 0) 623 goto done; 624 625 /* 626 * CS: present, r/w, accessed, 16-bit, byte granularity, usable 627 */ 628 desc_base = 0xffff0000; 629 desc_limit = 0xffff; 630 desc_access = 0x0093; 631 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_CS, 632 desc_base, desc_limit, desc_access); 633 if (error) 634 goto done; 635 636 sel = 0xf000; 637 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_CS, sel)) != 0) 638 goto done; 639 640 /* 641 * SS,DS,ES,FS,GS: present, r/w, accessed, 16-bit, byte granularity 642 */ 643 desc_base = 0; 644 desc_limit = 0xffff; 645 desc_access = 0x0093; 646 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_SS, 647 desc_base, desc_limit, desc_access); 648 if (error) 649 goto done; 650 651 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_DS, 652 desc_base, desc_limit, desc_access); 653 if (error) 654 goto done; 655 656 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_ES, 657 desc_base, desc_limit, desc_access); 658 if (error) 659 goto done; 660 661 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_FS, 662 desc_base, desc_limit, desc_access); 663 if (error) 664 goto done; 665 666 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_GS, 667 desc_base, desc_limit, desc_access); 668 if (error) 669 goto done; 670 671 sel = 0; 672 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_SS, sel)) != 0) 673 goto done; 674 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_DS, sel)) != 0) 675 goto done; 676 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_ES, sel)) != 0) 677 goto done; 678 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_FS, sel)) != 0) 679 goto done; 680 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_GS, sel)) != 0) 681 goto done; 682 683 /* General purpose registers */ 684 rdx = 0xf00; 685 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RAX, zero)) != 0) 686 goto done; 687 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RBX, zero)) != 0) 688 goto done; 689 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RCX, zero)) != 0) 690 goto done; 691 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RDX, rdx)) != 0) 692 goto done; 693 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RSI, zero)) != 0) 694 goto done; 695 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RDI, zero)) != 0) 696 goto done; 697 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RBP, zero)) != 0) 698 goto done; 699 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_RSP, zero)) != 0) 700 goto done; 701 702 /* GDTR, IDTR */ 703 desc_base = 0; 704 desc_limit = 0xffff; 705 desc_access = 0; 706 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_GDTR, 707 desc_base, desc_limit, desc_access); 708 if (error != 0) 709 goto done; 710 711 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_IDTR, 712 desc_base, desc_limit, desc_access); 713 if (error != 0) 714 goto done; 715 716 /* TR */ 717 desc_base = 0; 718 desc_limit = 0xffff; 719 desc_access = 0x0000008b; 720 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_TR, 0, 0, desc_access); 721 if (error) 722 goto done; 723 724 sel = 0; 725 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_TR, sel)) != 0) 726 goto done; 727 728 /* LDTR */ 729 desc_base = 0; 730 desc_limit = 0xffff; 731 desc_access = 0x00000082; 732 error = vm_set_desc(vmctx, vcpu, VM_REG_GUEST_LDTR, desc_base, 733 desc_limit, desc_access); 734 if (error) 735 goto done; 736 737 sel = 0; 738 if ((error = vm_set_register(vmctx, vcpu, VM_REG_GUEST_LDTR, 0)) != 0) 739 goto done; 740 741 /* XXX cr2, debug registers */ 742 743 error = 0; 744done: 745 return (error); 746} 747 748int 749vm_get_gpa_pmap(struct vmctx *ctx, uint64_t gpa, uint64_t *pte, int *num) 750{ 751 int error, i; 752 struct vm_gpa_pte gpapte; 753 754 bzero(&gpapte, sizeof(gpapte)); 755 gpapte.gpa = gpa; 756 757 error = ioctl(ctx->fd, VM_GET_GPA_PMAP, &gpapte); 758 759 if (error == 0) { 760 *num = gpapte.ptenum; 761 for (i = 0; i < gpapte.ptenum; i++) 762 pte[i] = gpapte.pte[i]; 763 } 764 765 return (error); 766} 767