1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2011 NetApp, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/sysctl.h> 39 #include <sys/malloc.h> 40 #include <sys/pcpu.h> 41 #include <sys/lock.h> 42 #include <sys/mutex.h> 43 #include <sys/proc.h> 44 #include <sys/rwlock.h> 45 #include <sys/sched.h> 46 #include <sys/smp.h> 47 #include <sys/systm.h> 48 49 #include <vm/vm.h> 50 #include <vm/vm_object.h> 51 #include <vm/vm_page.h> 52 #include <vm/pmap.h> 53 #include <vm/vm_map.h> 54 #include <vm/vm_extern.h> 55 #include <vm/vm_param.h> 56 57 #include <machine/cpu.h> 58 #include <machine/pcb.h> 59 #include <machine/smp.h> 60 #include <machine/md_var.h> 61 #include <x86/psl.h> 62 #include <x86/apicreg.h> 63 64 #include <machine/vmm.h> 65 #include <machine/vmm_dev.h> 66 #include <machine/vmm_instruction_emul.h> 67 68 #include "vmm_ioport.h" 69 #include "vmm_ktr.h" 70 #include "vmm_host.h" 71 #include "vmm_mem.h" 72 #include "vmm_util.h" 73 #include "vatpic.h" 74 #include "vatpit.h" 75 #include "vhpet.h" 76 #include "vioapic.h" 77 #include "vlapic.h" 78 #include "vpmtmr.h" 79 #include "vrtc.h" 80 #include "vmm_stat.h" 81 #include "vmm_lapic.h" 82 83 #include "io/ppt.h" 84 #include "io/iommu.h" 85 86 struct vlapic; 87 88 /* 89 * Initialization: 90 * (a) allocated when vcpu is created 91 * (i) initialized when vcpu is created and when it is reinitialized 92 * (o) initialized the first time the vcpu is created 93 * (x) initialized before use 94 */ 95 struct vcpu { 96 struct mtx mtx; /* (o) protects 'state' and 'hostcpu' */ 97 enum vcpu_state state; /* (o) vcpu state */ 98 int hostcpu; /* (o) vcpu's host cpu */ 99 int reqidle; /* (i) request vcpu to idle */ 100 struct vlapic *vlapic; /* (i) APIC device model */ 101 enum x2apic_state x2apic_state; /* (i) APIC mode */ 102 uint64_t exitintinfo; /* (i) events pending at VM exit */ 103 int nmi_pending; /* (i) NMI pending */ 104 int extint_pending; /* (i) INTR pending */ 105 int exception_pending; /* (i) exception pending */ 106 int exc_vector; /* (x) exception collateral */ 107 int exc_errcode_valid; 108 uint32_t exc_errcode; 109 struct savefpu *guestfpu; /* (a,i) guest fpu state */ 110 uint64_t guest_xcr0; /* (i) guest %xcr0 register */ 111 void *stats; /* (a,i) statistics */ 112 struct vm_exit exitinfo; /* (x) exit reason and collateral */ 113 uint64_t nextrip; /* (x) next instruction to execute */ 114 }; 115 116 #define vcpu_lock_initialized(v) mtx_initialized(&((v)->mtx)) 117 #define vcpu_lock_init(v) mtx_init(&((v)->mtx), "vcpu lock", 0, MTX_SPIN) 118 #define vcpu_lock(v) mtx_lock_spin(&((v)->mtx)) 119 #define vcpu_unlock(v) mtx_unlock_spin(&((v)->mtx)) 120 #define vcpu_assert_locked(v) mtx_assert(&((v)->mtx), MA_OWNED) 121 122 struct mem_seg { 123 size_t len; 124 bool sysmem; 125 struct vm_object *object; 126 }; 127 #define VM_MAX_MEMSEGS 3 128 129 struct mem_map { 130 vm_paddr_t gpa; 131 size_t len; 132 vm_ooffset_t segoff; 133 int segid; 134 int prot; 135 int flags; 136 }; 137 #define VM_MAX_MEMMAPS 4 138 139 /* 140 * Initialization: 141 * (o) initialized the first time the VM is created 142 * (i) initialized when VM is created and when it is reinitialized 143 * (x) initialized before use 144 */ 145 struct vm { 146 void *cookie; /* (i) cpu-specific data */ 147 void *iommu; /* (x) iommu-specific data */ 148 struct vhpet *vhpet; /* (i) virtual HPET */ 149 struct vioapic *vioapic; /* (i) virtual ioapic */ 150 struct vatpic *vatpic; /* (i) virtual atpic */ 151 struct vatpit *vatpit; /* (i) virtual atpit */ 152 struct vpmtmr *vpmtmr; /* (i) virtual ACPI PM timer */ 153 struct vrtc *vrtc; /* (o) virtual RTC */ 154 volatile cpuset_t active_cpus; /* (i) active vcpus */ 155 volatile cpuset_t debug_cpus; /* (i) vcpus stopped for debug */ 156 int suspend; /* (i) stop VM execution */ 157 volatile cpuset_t suspended_cpus; /* (i) suspended vcpus */ 158 volatile cpuset_t halted_cpus; /* (x) cpus in a hard halt */ 159 cpuset_t rendezvous_req_cpus; /* (x) rendezvous requested */ 160 cpuset_t rendezvous_done_cpus; /* (x) rendezvous finished */ 161 void *rendezvous_arg; /* (x) rendezvous func/arg */ 162 vm_rendezvous_func_t rendezvous_func; 163 struct mtx rendezvous_mtx; /* (o) rendezvous lock */ 164 struct mem_map mem_maps[VM_MAX_MEMMAPS]; /* (i) guest address space */ 165 struct mem_seg mem_segs[VM_MAX_MEMSEGS]; /* (o) guest memory regions */ 166 struct vmspace *vmspace; /* (o) guest's address space */ 167 char name[VM_MAX_NAMELEN]; /* (o) virtual machine name */ 168 struct vcpu vcpu[VM_MAXCPU]; /* (i) guest vcpus */ 169 /* The following describe the vm cpu topology */ 170 uint16_t sockets; /* (o) num of sockets */ 171 uint16_t cores; /* (o) num of cores/socket */ 172 uint16_t threads; /* (o) num of threads/core */ 173 uint16_t maxcpus; /* (o) max pluggable cpus */ 174 }; 175 176 static int vmm_initialized; 177 178 static struct vmm_ops *ops; 179 #define VMM_INIT(num) (ops != NULL ? (*ops->init)(num) : 0) 180 #define VMM_CLEANUP() (ops != NULL ? (*ops->cleanup)() : 0) 181 #define VMM_RESUME() (ops != NULL ? (*ops->resume)() : 0) 182 183 #define VMINIT(vm, pmap) (ops != NULL ? (*ops->vminit)(vm, pmap): NULL) 184 #define VMRUN(vmi, vcpu, rip, pmap, evinfo) \ 185 (ops != NULL ? (*ops->vmrun)(vmi, vcpu, rip, pmap, evinfo) : ENXIO) 186 #define VMCLEANUP(vmi) (ops != NULL ? (*ops->vmcleanup)(vmi) : NULL) 187 #define VMSPACE_ALLOC(min, max) \ 188 (ops != NULL ? (*ops->vmspace_alloc)(min, max) : NULL) 189 #define VMSPACE_FREE(vmspace) \ 190 (ops != NULL ? (*ops->vmspace_free)(vmspace) : ENXIO) 191 #define VMGETREG(vmi, vcpu, num, retval) \ 192 (ops != NULL ? (*ops->vmgetreg)(vmi, vcpu, num, retval) : ENXIO) 193 #define VMSETREG(vmi, vcpu, num, val) \ 194 (ops != NULL ? (*ops->vmsetreg)(vmi, vcpu, num, val) : ENXIO) 195 #define VMGETDESC(vmi, vcpu, num, desc) \ 196 (ops != NULL ? (*ops->vmgetdesc)(vmi, vcpu, num, desc) : ENXIO) 197 #define VMSETDESC(vmi, vcpu, num, desc) \ 198 (ops != NULL ? (*ops->vmsetdesc)(vmi, vcpu, num, desc) : ENXIO) 199 #define VMGETCAP(vmi, vcpu, num, retval) \ 200 (ops != NULL ? (*ops->vmgetcap)(vmi, vcpu, num, retval) : ENXIO) 201 #define VMSETCAP(vmi, vcpu, num, val) \ 202 (ops != NULL ? (*ops->vmsetcap)(vmi, vcpu, num, val) : ENXIO) 203 #define VLAPIC_INIT(vmi, vcpu) \ 204 (ops != NULL ? (*ops->vlapic_init)(vmi, vcpu) : NULL) 205 #define VLAPIC_CLEANUP(vmi, vlapic) \ 206 (ops != NULL ? (*ops->vlapic_cleanup)(vmi, vlapic) : NULL) 207 208 #define fpu_start_emulating() load_cr0(rcr0() | CR0_TS) 209 #define fpu_stop_emulating() clts() 210 211 SDT_PROVIDER_DEFINE(vmm); 212 213 static MALLOC_DEFINE(M_VM, "vm", "vm"); 214 215 /* statistics */ 216 static VMM_STAT(VCPU_TOTAL_RUNTIME, "vcpu total runtime"); 217 218 SYSCTL_NODE(_hw, OID_AUTO, vmm, CTLFLAG_RW, NULL, NULL); 219 220 /* 221 * Halt the guest if all vcpus are executing a HLT instruction with 222 * interrupts disabled. 223 */ 224 static int halt_detection_enabled = 1; 225 SYSCTL_INT(_hw_vmm, OID_AUTO, halt_detection, CTLFLAG_RDTUN, 226 &halt_detection_enabled, 0, 227 "Halt VM if all vcpus execute HLT with interrupts disabled"); 228 229 static int vmm_ipinum; 230 SYSCTL_INT(_hw_vmm, OID_AUTO, ipinum, CTLFLAG_RD, &vmm_ipinum, 0, 231 "IPI vector used for vcpu notifications"); 232 233 static int trace_guest_exceptions; 234 SYSCTL_INT(_hw_vmm, OID_AUTO, trace_guest_exceptions, CTLFLAG_RDTUN, 235 &trace_guest_exceptions, 0, 236 "Trap into hypervisor on all guest exceptions and reflect them back"); 237 238 static void vm_free_memmap(struct vm *vm, int ident); 239 static bool sysmem_mapping(struct vm *vm, struct mem_map *mm); 240 static void vcpu_notify_event_locked(struct vcpu *vcpu, bool lapic_intr); 241 242 #ifdef KTR 243 static const char * 244 vcpu_state2str(enum vcpu_state state) 245 { 246 247 switch (state) { 248 case VCPU_IDLE: 249 return ("idle"); 250 case VCPU_FROZEN: 251 return ("frozen"); 252 case VCPU_RUNNING: 253 return ("running"); 254 case VCPU_SLEEPING: 255 return ("sleeping"); 256 default: 257 return ("unknown"); 258 } 259 } 260 #endif 261 262 static void 263 vcpu_cleanup(struct vm *vm, int i, bool destroy) 264 { 265 struct vcpu *vcpu = &vm->vcpu[i]; 266 267 VLAPIC_CLEANUP(vm->cookie, vcpu->vlapic); 268 if (destroy) { 269 vmm_stat_free(vcpu->stats); 270 fpu_save_area_free(vcpu->guestfpu); 271 } 272 } 273 274 static void 275 vcpu_init(struct vm *vm, int vcpu_id, bool create) 276 { 277 struct vcpu *vcpu; 278 279 KASSERT(vcpu_id >= 0 && vcpu_id < vm->maxcpus, 280 ("vcpu_init: invalid vcpu %d", vcpu_id)); 281 282 vcpu = &vm->vcpu[vcpu_id]; 283 284 if (create) { 285 KASSERT(!vcpu_lock_initialized(vcpu), ("vcpu %d already " 286 "initialized", vcpu_id)); 287 vcpu_lock_init(vcpu); 288 vcpu->state = VCPU_IDLE; 289 vcpu->hostcpu = NOCPU; 290 vcpu->guestfpu = fpu_save_area_alloc(); 291 vcpu->stats = vmm_stat_alloc(); 292 } 293 294 vcpu->vlapic = VLAPIC_INIT(vm->cookie, vcpu_id); 295 vm_set_x2apic_state(vm, vcpu_id, X2APIC_DISABLED); 296 vcpu->reqidle = 0; 297 vcpu->exitintinfo = 0; 298 vcpu->nmi_pending = 0; 299 vcpu->extint_pending = 0; 300 vcpu->exception_pending = 0; 301 vcpu->guest_xcr0 = XFEATURE_ENABLED_X87; 302 fpu_save_area_reset(vcpu->guestfpu); 303 vmm_stat_init(vcpu->stats); 304 } 305 306 int 307 vcpu_trace_exceptions(struct vm *vm, int vcpuid) 308 { 309 310 return (trace_guest_exceptions); 311 } 312 313 struct vm_exit * 314 vm_exitinfo(struct vm *vm, int cpuid) 315 { 316 struct vcpu *vcpu; 317 318 if (cpuid < 0 || cpuid >= vm->maxcpus) 319 panic("vm_exitinfo: invalid cpuid %d", cpuid); 320 321 vcpu = &vm->vcpu[cpuid]; 322 323 return (&vcpu->exitinfo); 324 } 325 326 static void 327 vmm_resume(void) 328 { 329 VMM_RESUME(); 330 } 331 332 static int 333 vmm_init(void) 334 { 335 int error; 336 337 vmm_host_state_init(); 338 339 vmm_ipinum = lapic_ipi_alloc(pti ? &IDTVEC(justreturn1_pti) : 340 &IDTVEC(justreturn)); 341 if (vmm_ipinum < 0) 342 vmm_ipinum = IPI_AST; 343 344 error = vmm_mem_init(); 345 if (error) 346 return (error); 347 348 if (vmm_is_intel()) 349 ops = &vmm_ops_intel; 350 else if (vmm_is_amd()) 351 ops = &vmm_ops_amd; 352 else 353 return (ENXIO); 354 355 vmm_resume_p = vmm_resume; 356 357 return (VMM_INIT(vmm_ipinum)); 358 } 359 360 static int 361 vmm_handler(module_t mod, int what, void *arg) 362 { 363 int error; 364 365 switch (what) { 366 case MOD_LOAD: 367 vmmdev_init(); 368 error = vmm_init(); 369 if (error == 0) 370 vmm_initialized = 1; 371 break; 372 case MOD_UNLOAD: 373 error = vmmdev_cleanup(); 374 if (error == 0) { 375 vmm_resume_p = NULL; 376 iommu_cleanup(); 377 if (vmm_ipinum != IPI_AST) 378 lapic_ipi_free(vmm_ipinum); 379 error = VMM_CLEANUP(); 380 /* 381 * Something bad happened - prevent new 382 * VMs from being created 383 */ 384 if (error) 385 vmm_initialized = 0; 386 } 387 break; 388 default: 389 error = 0; 390 break; 391 } 392 return (error); 393 } 394 395 static moduledata_t vmm_kmod = { 396 "vmm", 397 vmm_handler, 398 NULL 399 }; 400 401 /* 402 * vmm initialization has the following dependencies: 403 * 404 * - VT-x initialization requires smp_rendezvous() and therefore must happen 405 * after SMP is fully functional (after SI_SUB_SMP). 406 */ 407 DECLARE_MODULE(vmm, vmm_kmod, SI_SUB_SMP + 1, SI_ORDER_ANY); 408 MODULE_VERSION(vmm, 1); 409 410 static void 411 vm_init(struct vm *vm, bool create) 412 { 413 int i; 414 415 vm->cookie = VMINIT(vm, vmspace_pmap(vm->vmspace)); 416 vm->iommu = NULL; 417 vm->vioapic = vioapic_init(vm); 418 vm->vhpet = vhpet_init(vm); 419 vm->vatpic = vatpic_init(vm); 420 vm->vatpit = vatpit_init(vm); 421 vm->vpmtmr = vpmtmr_init(vm); 422 if (create) 423 vm->vrtc = vrtc_init(vm); 424 425 CPU_ZERO(&vm->active_cpus); 426 CPU_ZERO(&vm->debug_cpus); 427 428 vm->suspend = 0; 429 CPU_ZERO(&vm->suspended_cpus); 430 431 for (i = 0; i < vm->maxcpus; i++) 432 vcpu_init(vm, i, create); 433 } 434 435 /* 436 * The default CPU topology is a single thread per package. 437 */ 438 u_int cores_per_package = 1; 439 u_int threads_per_core = 1; 440 441 int 442 vm_create(const char *name, struct vm **retvm) 443 { 444 struct vm *vm; 445 struct vmspace *vmspace; 446 447 /* 448 * If vmm.ko could not be successfully initialized then don't attempt 449 * to create the virtual machine. 450 */ 451 if (!vmm_initialized) 452 return (ENXIO); 453 454 if (name == NULL || strlen(name) >= VM_MAX_NAMELEN) 455 return (EINVAL); 456 457 vmspace = VMSPACE_ALLOC(0, VM_MAXUSER_ADDRESS); 458 if (vmspace == NULL) 459 return (ENOMEM); 460 461 vm = malloc(sizeof(struct vm), M_VM, M_WAITOK | M_ZERO); 462 strcpy(vm->name, name); 463 vm->vmspace = vmspace; 464 mtx_init(&vm->rendezvous_mtx, "vm rendezvous lock", 0, MTX_DEF); 465 466 vm->sockets = 1; 467 vm->cores = cores_per_package; /* XXX backwards compatibility */ 468 vm->threads = threads_per_core; /* XXX backwards compatibility */ 469 vm->maxcpus = VM_MAXCPU; /* XXX temp to keep code working */ 470 471 vm_init(vm, true); 472 473 *retvm = vm; 474 return (0); 475 } 476 477 void 478 vm_get_topology(struct vm *vm, uint16_t *sockets, uint16_t *cores, 479 uint16_t *threads, uint16_t *maxcpus) 480 { 481 *sockets = vm->sockets; 482 *cores = vm->cores; 483 *threads = vm->threads; 484 *maxcpus = vm->maxcpus; 485 } 486 487 uint16_t 488 vm_get_maxcpus(struct vm *vm) 489 { 490 return (vm->maxcpus); 491 } 492 493 int 494 vm_set_topology(struct vm *vm, uint16_t sockets, uint16_t cores, 495 uint16_t threads, uint16_t maxcpus) 496 { 497 if (maxcpus != 0) 498 return (EINVAL); /* XXX remove when supported */ 499 if ((sockets * cores * threads) > vm->maxcpus) 500 return (EINVAL); 501 /* XXX need to check sockets * cores * threads == vCPU, how? */ 502 vm->sockets = sockets; 503 vm->cores = cores; 504 vm->threads = threads; 505 vm->maxcpus = VM_MAXCPU; /* XXX temp to keep code working */ 506 return(0); 507 } 508 509 static void 510 vm_cleanup(struct vm *vm, bool destroy) 511 { 512 struct mem_map *mm; 513 int i; 514 515 ppt_unassign_all(vm); 516 517 if (vm->iommu != NULL) 518 iommu_destroy_domain(vm->iommu); 519 520 if (destroy) 521 vrtc_cleanup(vm->vrtc); 522 else 523 vrtc_reset(vm->vrtc); 524 vpmtmr_cleanup(vm->vpmtmr); 525 vatpit_cleanup(vm->vatpit); 526 vhpet_cleanup(vm->vhpet); 527 vatpic_cleanup(vm->vatpic); 528 vioapic_cleanup(vm->vioapic); 529 530 for (i = 0; i < vm->maxcpus; i++) 531 vcpu_cleanup(vm, i, destroy); 532 533 VMCLEANUP(vm->cookie); 534 535 /* 536 * System memory is removed from the guest address space only when 537 * the VM is destroyed. This is because the mapping remains the same 538 * across VM reset. 539 * 540 * Device memory can be relocated by the guest (e.g. using PCI BARs) 541 * so those mappings are removed on a VM reset. 542 */ 543 for (i = 0; i < VM_MAX_MEMMAPS; i++) { 544 mm = &vm->mem_maps[i]; 545 if (destroy || !sysmem_mapping(vm, mm)) 546 vm_free_memmap(vm, i); 547 } 548 549 if (destroy) { 550 for (i = 0; i < VM_MAX_MEMSEGS; i++) 551 vm_free_memseg(vm, i); 552 553 VMSPACE_FREE(vm->vmspace); 554 vm->vmspace = NULL; 555 } 556 } 557 558 void 559 vm_destroy(struct vm *vm) 560 { 561 vm_cleanup(vm, true); 562 free(vm, M_VM); 563 } 564 565 int 566 vm_reinit(struct vm *vm) 567 { 568 int error; 569 570 /* 571 * A virtual machine can be reset only if all vcpus are suspended. 572 */ 573 if (CPU_CMP(&vm->suspended_cpus, &vm->active_cpus) == 0) { 574 vm_cleanup(vm, false); 575 vm_init(vm, false); 576 error = 0; 577 } else { 578 error = EBUSY; 579 } 580 581 return (error); 582 } 583 584 const char * 585 vm_name(struct vm *vm) 586 { 587 return (vm->name); 588 } 589 590 int 591 vm_map_mmio(struct vm *vm, vm_paddr_t gpa, size_t len, vm_paddr_t hpa) 592 { 593 vm_object_t obj; 594 595 if ((obj = vmm_mmio_alloc(vm->vmspace, gpa, len, hpa)) == NULL) 596 return (ENOMEM); 597 else 598 return (0); 599 } 600 601 int 602 vm_unmap_mmio(struct vm *vm, vm_paddr_t gpa, size_t len) 603 { 604 605 vmm_mmio_free(vm->vmspace, gpa, len); 606 return (0); 607 } 608 609 /* 610 * Return 'true' if 'gpa' is allocated in the guest address space. 611 * 612 * This function is called in the context of a running vcpu which acts as 613 * an implicit lock on 'vm->mem_maps[]'. 614 */ 615 bool 616 vm_mem_allocated(struct vm *vm, int vcpuid, vm_paddr_t gpa) 617 { 618 struct mem_map *mm; 619 int i; 620 621 #ifdef INVARIANTS 622 int hostcpu, state; 623 state = vcpu_get_state(vm, vcpuid, &hostcpu); 624 KASSERT(state == VCPU_RUNNING && hostcpu == curcpu, 625 ("%s: invalid vcpu state %d/%d", __func__, state, hostcpu)); 626 #endif 627 628 for (i = 0; i < VM_MAX_MEMMAPS; i++) { 629 mm = &vm->mem_maps[i]; 630 if (mm->len != 0 && gpa >= mm->gpa && gpa < mm->gpa + mm->len) 631 return (true); /* 'gpa' is sysmem or devmem */ 632 } 633 634 if (ppt_is_mmio(vm, gpa)) 635 return (true); /* 'gpa' is pci passthru mmio */ 636 637 return (false); 638 } 639 640 int 641 vm_alloc_memseg(struct vm *vm, int ident, size_t len, bool sysmem) 642 { 643 struct mem_seg *seg; 644 vm_object_t obj; 645 646 if (ident < 0 || ident >= VM_MAX_MEMSEGS) 647 return (EINVAL); 648 649 if (len == 0 || (len & PAGE_MASK)) 650 return (EINVAL); 651 652 seg = &vm->mem_segs[ident]; 653 if (seg->object != NULL) { 654 if (seg->len == len && seg->sysmem == sysmem) 655 return (EEXIST); 656 else 657 return (EINVAL); 658 } 659 660 obj = vm_object_allocate(OBJT_DEFAULT, len >> PAGE_SHIFT); 661 if (obj == NULL) 662 return (ENOMEM); 663 664 seg->len = len; 665 seg->object = obj; 666 seg->sysmem = sysmem; 667 return (0); 668 } 669 670 int 671 vm_get_memseg(struct vm *vm, int ident, size_t *len, bool *sysmem, 672 vm_object_t *objptr) 673 { 674 struct mem_seg *seg; 675 676 if (ident < 0 || ident >= VM_MAX_MEMSEGS) 677 return (EINVAL); 678 679 seg = &vm->mem_segs[ident]; 680 if (len) 681 *len = seg->len; 682 if (sysmem) 683 *sysmem = seg->sysmem; 684 if (objptr) 685 *objptr = seg->object; 686 return (0); 687 } 688 689 void 690 vm_free_memseg(struct vm *vm, int ident) 691 { 692 struct mem_seg *seg; 693 694 KASSERT(ident >= 0 && ident < VM_MAX_MEMSEGS, 695 ("%s: invalid memseg ident %d", __func__, ident)); 696 697 seg = &vm->mem_segs[ident]; 698 if (seg->object != NULL) { 699 vm_object_deallocate(seg->object); 700 bzero(seg, sizeof(struct mem_seg)); 701 } 702 } 703 704 int 705 vm_mmap_memseg(struct vm *vm, vm_paddr_t gpa, int segid, vm_ooffset_t first, 706 size_t len, int prot, int flags) 707 { 708 struct mem_seg *seg; 709 struct mem_map *m, *map; 710 vm_ooffset_t last; 711 int i, error; 712 713 if (prot == 0 || (prot & ~(VM_PROT_ALL)) != 0) 714 return (EINVAL); 715 716 if (flags & ~VM_MEMMAP_F_WIRED) 717 return (EINVAL); 718 719 if (segid < 0 || segid >= VM_MAX_MEMSEGS) 720 return (EINVAL); 721 722 seg = &vm->mem_segs[segid]; 723 if (seg->object == NULL) 724 return (EINVAL); 725 726 last = first + len; 727 if (first < 0 || first >= last || last > seg->len) 728 return (EINVAL); 729 730 if ((gpa | first | last) & PAGE_MASK) 731 return (EINVAL); 732 733 map = NULL; 734 for (i = 0; i < VM_MAX_MEMMAPS; i++) { 735 m = &vm->mem_maps[i]; 736 if (m->len == 0) { 737 map = m; 738 break; 739 } 740 } 741 742 if (map == NULL) 743 return (ENOSPC); 744 745 error = vm_map_find(&vm->vmspace->vm_map, seg->object, first, &gpa, 746 len, 0, VMFS_NO_SPACE, prot, prot, 0); 747 if (error != KERN_SUCCESS) 748 return (EFAULT); 749 750 vm_object_reference(seg->object); 751 752 if (flags & VM_MEMMAP_F_WIRED) { 753 error = vm_map_wire(&vm->vmspace->vm_map, gpa, gpa + len, 754 VM_MAP_WIRE_USER | VM_MAP_WIRE_NOHOLES); 755 if (error != KERN_SUCCESS) { 756 vm_map_remove(&vm->vmspace->vm_map, gpa, gpa + len); 757 return (error == KERN_RESOURCE_SHORTAGE ? ENOMEM : 758 EFAULT); 759 } 760 } 761 762 map->gpa = gpa; 763 map->len = len; 764 map->segoff = first; 765 map->segid = segid; 766 map->prot = prot; 767 map->flags = flags; 768 return (0); 769 } 770 771 int 772 vm_mmap_getnext(struct vm *vm, vm_paddr_t *gpa, int *segid, 773 vm_ooffset_t *segoff, size_t *len, int *prot, int *flags) 774 { 775 struct mem_map *mm, *mmnext; 776 int i; 777 778 mmnext = NULL; 779 for (i = 0; i < VM_MAX_MEMMAPS; i++) { 780 mm = &vm->mem_maps[i]; 781 if (mm->len == 0 || mm->gpa < *gpa) 782 continue; 783 if (mmnext == NULL || mm->gpa < mmnext->gpa) 784 mmnext = mm; 785 } 786 787 if (mmnext != NULL) { 788 *gpa = mmnext->gpa; 789 if (segid) 790 *segid = mmnext->segid; 791 if (segoff) 792 *segoff = mmnext->segoff; 793 if (len) 794 *len = mmnext->len; 795 if (prot) 796 *prot = mmnext->prot; 797 if (flags) 798 *flags = mmnext->flags; 799 return (0); 800 } else { 801 return (ENOENT); 802 } 803 } 804 805 static void 806 vm_free_memmap(struct vm *vm, int ident) 807 { 808 struct mem_map *mm; 809 int error; 810 811 mm = &vm->mem_maps[ident]; 812 if (mm->len) { 813 error = vm_map_remove(&vm->vmspace->vm_map, mm->gpa, 814 mm->gpa + mm->len); 815 KASSERT(error == KERN_SUCCESS, ("%s: vm_map_remove error %d", 816 __func__, error)); 817 bzero(mm, sizeof(struct mem_map)); 818 } 819 } 820 821 static __inline bool 822 sysmem_mapping(struct vm *vm, struct mem_map *mm) 823 { 824 825 if (mm->len != 0 && vm->mem_segs[mm->segid].sysmem) 826 return (true); 827 else 828 return (false); 829 } 830 831 vm_paddr_t 832 vmm_sysmem_maxaddr(struct vm *vm) 833 { 834 struct mem_map *mm; 835 vm_paddr_t maxaddr; 836 int i; 837 838 maxaddr = 0; 839 for (i = 0; i < VM_MAX_MEMMAPS; i++) { 840 mm = &vm->mem_maps[i]; 841 if (sysmem_mapping(vm, mm)) { 842 if (maxaddr < mm->gpa + mm->len) 843 maxaddr = mm->gpa + mm->len; 844 } 845 } 846 return (maxaddr); 847 } 848 849 static void 850 vm_iommu_modify(struct vm *vm, boolean_t map) 851 { 852 int i, sz; 853 vm_paddr_t gpa, hpa; 854 struct mem_map *mm; 855 void *vp, *cookie, *host_domain; 856 857 sz = PAGE_SIZE; 858 host_domain = iommu_host_domain(); 859 860 for (i = 0; i < VM_MAX_MEMMAPS; i++) { 861 mm = &vm->mem_maps[i]; 862 if (!sysmem_mapping(vm, mm)) 863 continue; 864 865 if (map) { 866 KASSERT((mm->flags & VM_MEMMAP_F_IOMMU) == 0, 867 ("iommu map found invalid memmap %#lx/%#lx/%#x", 868 mm->gpa, mm->len, mm->flags)); 869 if ((mm->flags & VM_MEMMAP_F_WIRED) == 0) 870 continue; 871 mm->flags |= VM_MEMMAP_F_IOMMU; 872 } else { 873 if ((mm->flags & VM_MEMMAP_F_IOMMU) == 0) 874 continue; 875 mm->flags &= ~VM_MEMMAP_F_IOMMU; 876 KASSERT((mm->flags & VM_MEMMAP_F_WIRED) != 0, 877 ("iommu unmap found invalid memmap %#lx/%#lx/%#x", 878 mm->gpa, mm->len, mm->flags)); 879 } 880 881 gpa = mm->gpa; 882 while (gpa < mm->gpa + mm->len) { 883 vp = vm_gpa_hold(vm, -1, gpa, PAGE_SIZE, VM_PROT_WRITE, 884 &cookie); 885 KASSERT(vp != NULL, ("vm(%s) could not map gpa %#lx", 886 vm_name(vm), gpa)); 887 888 vm_gpa_release(cookie); 889 890 hpa = DMAP_TO_PHYS((uintptr_t)vp); 891 if (map) { 892 iommu_create_mapping(vm->iommu, gpa, hpa, sz); 893 iommu_remove_mapping(host_domain, hpa, sz); 894 } else { 895 iommu_remove_mapping(vm->iommu, gpa, sz); 896 iommu_create_mapping(host_domain, hpa, hpa, sz); 897 } 898 899 gpa += PAGE_SIZE; 900 } 901 } 902 903 /* 904 * Invalidate the cached translations associated with the domain 905 * from which pages were removed. 906 */ 907 if (map) 908 iommu_invalidate_tlb(host_domain); 909 else 910 iommu_invalidate_tlb(vm->iommu); 911 } 912 913 #define vm_iommu_unmap(vm) vm_iommu_modify((vm), FALSE) 914 #define vm_iommu_map(vm) vm_iommu_modify((vm), TRUE) 915 916 int 917 vm_unassign_pptdev(struct vm *vm, int bus, int slot, int func) 918 { 919 int error; 920 921 error = ppt_unassign_device(vm, bus, slot, func); 922 if (error) 923 return (error); 924 925 if (ppt_assigned_devices(vm) == 0) 926 vm_iommu_unmap(vm); 927 928 return (0); 929 } 930 931 int 932 vm_assign_pptdev(struct vm *vm, int bus, int slot, int func) 933 { 934 int error; 935 vm_paddr_t maxaddr; 936 937 /* Set up the IOMMU to do the 'gpa' to 'hpa' translation */ 938 if (ppt_assigned_devices(vm) == 0) { 939 KASSERT(vm->iommu == NULL, 940 ("vm_assign_pptdev: iommu must be NULL")); 941 maxaddr = vmm_sysmem_maxaddr(vm); 942 vm->iommu = iommu_create_domain(maxaddr); 943 if (vm->iommu == NULL) 944 return (ENXIO); 945 vm_iommu_map(vm); 946 } 947 948 error = ppt_assign_device(vm, bus, slot, func); 949 return (error); 950 } 951 952 void * 953 vm_gpa_hold(struct vm *vm, int vcpuid, vm_paddr_t gpa, size_t len, int reqprot, 954 void **cookie) 955 { 956 int i, count, pageoff; 957 struct mem_map *mm; 958 vm_page_t m; 959 #ifdef INVARIANTS 960 /* 961 * All vcpus are frozen by ioctls that modify the memory map 962 * (e.g. VM_MMAP_MEMSEG). Therefore 'vm->memmap[]' stability is 963 * guaranteed if at least one vcpu is in the VCPU_FROZEN state. 964 */ 965 int state; 966 KASSERT(vcpuid >= -1 && vcpuid < vm->maxcpus, ("%s: invalid vcpuid %d", 967 __func__, vcpuid)); 968 for (i = 0; i < vm->maxcpus; i++) { 969 if (vcpuid != -1 && vcpuid != i) 970 continue; 971 state = vcpu_get_state(vm, i, NULL); 972 KASSERT(state == VCPU_FROZEN, ("%s: invalid vcpu state %d", 973 __func__, state)); 974 } 975 #endif 976 pageoff = gpa & PAGE_MASK; 977 if (len > PAGE_SIZE - pageoff) 978 panic("vm_gpa_hold: invalid gpa/len: 0x%016lx/%lu", gpa, len); 979 980 count = 0; 981 for (i = 0; i < VM_MAX_MEMMAPS; i++) { 982 mm = &vm->mem_maps[i]; 983 if (sysmem_mapping(vm, mm) && gpa >= mm->gpa && 984 gpa < mm->gpa + mm->len) { 985 count = vm_fault_quick_hold_pages(&vm->vmspace->vm_map, 986 trunc_page(gpa), PAGE_SIZE, reqprot, &m, 1); 987 break; 988 } 989 } 990 991 if (count == 1) { 992 *cookie = m; 993 return ((void *)(PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m)) + pageoff)); 994 } else { 995 *cookie = NULL; 996 return (NULL); 997 } 998 } 999 1000 void 1001 vm_gpa_release(void *cookie) 1002 { 1003 vm_page_t m = cookie; 1004 1005 vm_page_lock(m); 1006 vm_page_unhold(m); 1007 vm_page_unlock(m); 1008 } 1009 1010 int 1011 vm_get_register(struct vm *vm, int vcpu, int reg, uint64_t *retval) 1012 { 1013 1014 if (vcpu < 0 || vcpu >= vm->maxcpus) 1015 return (EINVAL); 1016 1017 if (reg >= VM_REG_LAST) 1018 return (EINVAL); 1019 1020 return (VMGETREG(vm->cookie, vcpu, reg, retval)); 1021 } 1022 1023 int 1024 vm_set_register(struct vm *vm, int vcpuid, int reg, uint64_t val) 1025 { 1026 struct vcpu *vcpu; 1027 int error; 1028 1029 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 1030 return (EINVAL); 1031 1032 if (reg >= VM_REG_LAST) 1033 return (EINVAL); 1034 1035 error = VMSETREG(vm->cookie, vcpuid, reg, val); 1036 if (error || reg != VM_REG_GUEST_RIP) 1037 return (error); 1038 1039 /* Set 'nextrip' to match the value of %rip */ 1040 VCPU_CTR1(vm, vcpuid, "Setting nextrip to %#lx", val); 1041 vcpu = &vm->vcpu[vcpuid]; 1042 vcpu->nextrip = val; 1043 return (0); 1044 } 1045 1046 static boolean_t 1047 is_descriptor_table(int reg) 1048 { 1049 1050 switch (reg) { 1051 case VM_REG_GUEST_IDTR: 1052 case VM_REG_GUEST_GDTR: 1053 return (TRUE); 1054 default: 1055 return (FALSE); 1056 } 1057 } 1058 1059 static boolean_t 1060 is_segment_register(int reg) 1061 { 1062 1063 switch (reg) { 1064 case VM_REG_GUEST_ES: 1065 case VM_REG_GUEST_CS: 1066 case VM_REG_GUEST_SS: 1067 case VM_REG_GUEST_DS: 1068 case VM_REG_GUEST_FS: 1069 case VM_REG_GUEST_GS: 1070 case VM_REG_GUEST_TR: 1071 case VM_REG_GUEST_LDTR: 1072 return (TRUE); 1073 default: 1074 return (FALSE); 1075 } 1076 } 1077 1078 int 1079 vm_get_seg_desc(struct vm *vm, int vcpu, int reg, 1080 struct seg_desc *desc) 1081 { 1082 1083 if (vcpu < 0 || vcpu >= vm->maxcpus) 1084 return (EINVAL); 1085 1086 if (!is_segment_register(reg) && !is_descriptor_table(reg)) 1087 return (EINVAL); 1088 1089 return (VMGETDESC(vm->cookie, vcpu, reg, desc)); 1090 } 1091 1092 int 1093 vm_set_seg_desc(struct vm *vm, int vcpu, int reg, 1094 struct seg_desc *desc) 1095 { 1096 if (vcpu < 0 || vcpu >= vm->maxcpus) 1097 return (EINVAL); 1098 1099 if (!is_segment_register(reg) && !is_descriptor_table(reg)) 1100 return (EINVAL); 1101 1102 return (VMSETDESC(vm->cookie, vcpu, reg, desc)); 1103 } 1104 1105 static void 1106 restore_guest_fpustate(struct vcpu *vcpu) 1107 { 1108 1109 /* flush host state to the pcb */ 1110 fpuexit(curthread); 1111 1112 /* restore guest FPU state */ 1113 fpu_stop_emulating(); 1114 fpurestore(vcpu->guestfpu); 1115 1116 /* restore guest XCR0 if XSAVE is enabled in the host */ 1117 if (rcr4() & CR4_XSAVE) 1118 load_xcr(0, vcpu->guest_xcr0); 1119 1120 /* 1121 * The FPU is now "dirty" with the guest's state so turn on emulation 1122 * to trap any access to the FPU by the host. 1123 */ 1124 fpu_start_emulating(); 1125 } 1126 1127 static void 1128 save_guest_fpustate(struct vcpu *vcpu) 1129 { 1130 1131 if ((rcr0() & CR0_TS) == 0) 1132 panic("fpu emulation not enabled in host!"); 1133 1134 /* save guest XCR0 and restore host XCR0 */ 1135 if (rcr4() & CR4_XSAVE) { 1136 vcpu->guest_xcr0 = rxcr(0); 1137 load_xcr(0, vmm_get_host_xcr0()); 1138 } 1139 1140 /* save guest FPU state */ 1141 fpu_stop_emulating(); 1142 fpusave(vcpu->guestfpu); 1143 fpu_start_emulating(); 1144 } 1145 1146 static VMM_STAT(VCPU_IDLE_TICKS, "number of ticks vcpu was idle"); 1147 1148 static int 1149 vcpu_set_state_locked(struct vm *vm, int vcpuid, enum vcpu_state newstate, 1150 bool from_idle) 1151 { 1152 struct vcpu *vcpu; 1153 int error; 1154 1155 vcpu = &vm->vcpu[vcpuid]; 1156 vcpu_assert_locked(vcpu); 1157 1158 /* 1159 * State transitions from the vmmdev_ioctl() must always begin from 1160 * the VCPU_IDLE state. This guarantees that there is only a single 1161 * ioctl() operating on a vcpu at any point. 1162 */ 1163 if (from_idle) { 1164 while (vcpu->state != VCPU_IDLE) { 1165 vcpu->reqidle = 1; 1166 vcpu_notify_event_locked(vcpu, false); 1167 VCPU_CTR1(vm, vcpuid, "vcpu state change from %s to " 1168 "idle requested", vcpu_state2str(vcpu->state)); 1169 msleep_spin(&vcpu->state, &vcpu->mtx, "vmstat", hz); 1170 } 1171 } else { 1172 KASSERT(vcpu->state != VCPU_IDLE, ("invalid transition from " 1173 "vcpu idle state")); 1174 } 1175 1176 if (vcpu->state == VCPU_RUNNING) { 1177 KASSERT(vcpu->hostcpu == curcpu, ("curcpu %d and hostcpu %d " 1178 "mismatch for running vcpu", curcpu, vcpu->hostcpu)); 1179 } else { 1180 KASSERT(vcpu->hostcpu == NOCPU, ("Invalid hostcpu %d for a " 1181 "vcpu that is not running", vcpu->hostcpu)); 1182 } 1183 1184 /* 1185 * The following state transitions are allowed: 1186 * IDLE -> FROZEN -> IDLE 1187 * FROZEN -> RUNNING -> FROZEN 1188 * FROZEN -> SLEEPING -> FROZEN 1189 */ 1190 switch (vcpu->state) { 1191 case VCPU_IDLE: 1192 case VCPU_RUNNING: 1193 case VCPU_SLEEPING: 1194 error = (newstate != VCPU_FROZEN); 1195 break; 1196 case VCPU_FROZEN: 1197 error = (newstate == VCPU_FROZEN); 1198 break; 1199 default: 1200 error = 1; 1201 break; 1202 } 1203 1204 if (error) 1205 return (EBUSY); 1206 1207 VCPU_CTR2(vm, vcpuid, "vcpu state changed from %s to %s", 1208 vcpu_state2str(vcpu->state), vcpu_state2str(newstate)); 1209 1210 vcpu->state = newstate; 1211 if (newstate == VCPU_RUNNING) 1212 vcpu->hostcpu = curcpu; 1213 else 1214 vcpu->hostcpu = NOCPU; 1215 1216 if (newstate == VCPU_IDLE) 1217 wakeup(&vcpu->state); 1218 1219 return (0); 1220 } 1221 1222 static void 1223 vcpu_require_state(struct vm *vm, int vcpuid, enum vcpu_state newstate) 1224 { 1225 int error; 1226 1227 if ((error = vcpu_set_state(vm, vcpuid, newstate, false)) != 0) 1228 panic("Error %d setting state to %d\n", error, newstate); 1229 } 1230 1231 static void 1232 vcpu_require_state_locked(struct vm *vm, int vcpuid, enum vcpu_state newstate) 1233 { 1234 int error; 1235 1236 if ((error = vcpu_set_state_locked(vm, vcpuid, newstate, false)) != 0) 1237 panic("Error %d setting state to %d", error, newstate); 1238 } 1239 1240 static void 1241 vm_set_rendezvous_func(struct vm *vm, vm_rendezvous_func_t func) 1242 { 1243 1244 KASSERT(mtx_owned(&vm->rendezvous_mtx), ("rendezvous_mtx not locked")); 1245 1246 /* 1247 * Update 'rendezvous_func' and execute a write memory barrier to 1248 * ensure that it is visible across all host cpus. This is not needed 1249 * for correctness but it does ensure that all the vcpus will notice 1250 * that the rendezvous is requested immediately. 1251 */ 1252 vm->rendezvous_func = func; 1253 wmb(); 1254 } 1255 1256 #define RENDEZVOUS_CTR0(vm, vcpuid, fmt) \ 1257 do { \ 1258 if (vcpuid >= 0) \ 1259 VCPU_CTR0(vm, vcpuid, fmt); \ 1260 else \ 1261 VM_CTR0(vm, fmt); \ 1262 } while (0) 1263 1264 static void 1265 vm_handle_rendezvous(struct vm *vm, int vcpuid) 1266 { 1267 1268 KASSERT(vcpuid == -1 || (vcpuid >= 0 && vcpuid < vm->maxcpus), 1269 ("vm_handle_rendezvous: invalid vcpuid %d", vcpuid)); 1270 1271 mtx_lock(&vm->rendezvous_mtx); 1272 while (vm->rendezvous_func != NULL) { 1273 /* 'rendezvous_req_cpus' must be a subset of 'active_cpus' */ 1274 CPU_AND(&vm->rendezvous_req_cpus, &vm->active_cpus); 1275 1276 if (vcpuid != -1 && 1277 CPU_ISSET(vcpuid, &vm->rendezvous_req_cpus) && 1278 !CPU_ISSET(vcpuid, &vm->rendezvous_done_cpus)) { 1279 VCPU_CTR0(vm, vcpuid, "Calling rendezvous func"); 1280 (*vm->rendezvous_func)(vm, vcpuid, vm->rendezvous_arg); 1281 CPU_SET(vcpuid, &vm->rendezvous_done_cpus); 1282 } 1283 if (CPU_CMP(&vm->rendezvous_req_cpus, 1284 &vm->rendezvous_done_cpus) == 0) { 1285 VCPU_CTR0(vm, vcpuid, "Rendezvous completed"); 1286 vm_set_rendezvous_func(vm, NULL); 1287 wakeup(&vm->rendezvous_func); 1288 break; 1289 } 1290 RENDEZVOUS_CTR0(vm, vcpuid, "Wait for rendezvous completion"); 1291 mtx_sleep(&vm->rendezvous_func, &vm->rendezvous_mtx, 0, 1292 "vmrndv", 0); 1293 } 1294 mtx_unlock(&vm->rendezvous_mtx); 1295 } 1296 1297 /* 1298 * Emulate a guest 'hlt' by sleeping until the vcpu is ready to run. 1299 */ 1300 static int 1301 vm_handle_hlt(struct vm *vm, int vcpuid, bool intr_disabled, bool *retu) 1302 { 1303 struct vcpu *vcpu; 1304 const char *wmesg; 1305 int t, vcpu_halted, vm_halted; 1306 1307 KASSERT(!CPU_ISSET(vcpuid, &vm->halted_cpus), ("vcpu already halted")); 1308 1309 vcpu = &vm->vcpu[vcpuid]; 1310 vcpu_halted = 0; 1311 vm_halted = 0; 1312 1313 vcpu_lock(vcpu); 1314 while (1) { 1315 /* 1316 * Do a final check for pending NMI or interrupts before 1317 * really putting this thread to sleep. Also check for 1318 * software events that would cause this vcpu to wakeup. 1319 * 1320 * These interrupts/events could have happened after the 1321 * vcpu returned from VMRUN() and before it acquired the 1322 * vcpu lock above. 1323 */ 1324 if (vm->rendezvous_func != NULL || vm->suspend || vcpu->reqidle) 1325 break; 1326 if (vm_nmi_pending(vm, vcpuid)) 1327 break; 1328 if (!intr_disabled) { 1329 if (vm_extint_pending(vm, vcpuid) || 1330 vlapic_pending_intr(vcpu->vlapic, NULL)) { 1331 break; 1332 } 1333 } 1334 1335 /* Don't go to sleep if the vcpu thread needs to yield */ 1336 if (vcpu_should_yield(vm, vcpuid)) 1337 break; 1338 1339 if (vcpu_debugged(vm, vcpuid)) 1340 break; 1341 1342 /* 1343 * Some Linux guests implement "halt" by having all vcpus 1344 * execute HLT with interrupts disabled. 'halted_cpus' keeps 1345 * track of the vcpus that have entered this state. When all 1346 * vcpus enter the halted state the virtual machine is halted. 1347 */ 1348 if (intr_disabled) { 1349 wmesg = "vmhalt"; 1350 VCPU_CTR0(vm, vcpuid, "Halted"); 1351 if (!vcpu_halted && halt_detection_enabled) { 1352 vcpu_halted = 1; 1353 CPU_SET_ATOMIC(vcpuid, &vm->halted_cpus); 1354 } 1355 if (CPU_CMP(&vm->halted_cpus, &vm->active_cpus) == 0) { 1356 vm_halted = 1; 1357 break; 1358 } 1359 } else { 1360 wmesg = "vmidle"; 1361 } 1362 1363 t = ticks; 1364 vcpu_require_state_locked(vm, vcpuid, VCPU_SLEEPING); 1365 /* 1366 * XXX msleep_spin() cannot be interrupted by signals so 1367 * wake up periodically to check pending signals. 1368 */ 1369 msleep_spin(vcpu, &vcpu->mtx, wmesg, hz); 1370 vcpu_require_state_locked(vm, vcpuid, VCPU_FROZEN); 1371 vmm_stat_incr(vm, vcpuid, VCPU_IDLE_TICKS, ticks - t); 1372 } 1373 1374 if (vcpu_halted) 1375 CPU_CLR_ATOMIC(vcpuid, &vm->halted_cpus); 1376 1377 vcpu_unlock(vcpu); 1378 1379 if (vm_halted) 1380 vm_suspend(vm, VM_SUSPEND_HALT); 1381 1382 return (0); 1383 } 1384 1385 static int 1386 vm_handle_paging(struct vm *vm, int vcpuid, bool *retu) 1387 { 1388 int rv, ftype; 1389 struct vm_map *map; 1390 struct vcpu *vcpu; 1391 struct vm_exit *vme; 1392 1393 vcpu = &vm->vcpu[vcpuid]; 1394 vme = &vcpu->exitinfo; 1395 1396 KASSERT(vme->inst_length == 0, ("%s: invalid inst_length %d", 1397 __func__, vme->inst_length)); 1398 1399 ftype = vme->u.paging.fault_type; 1400 KASSERT(ftype == VM_PROT_READ || 1401 ftype == VM_PROT_WRITE || ftype == VM_PROT_EXECUTE, 1402 ("vm_handle_paging: invalid fault_type %d", ftype)); 1403 1404 if (ftype == VM_PROT_READ || ftype == VM_PROT_WRITE) { 1405 rv = pmap_emulate_accessed_dirty(vmspace_pmap(vm->vmspace), 1406 vme->u.paging.gpa, ftype); 1407 if (rv == 0) { 1408 VCPU_CTR2(vm, vcpuid, "%s bit emulation for gpa %#lx", 1409 ftype == VM_PROT_READ ? "accessed" : "dirty", 1410 vme->u.paging.gpa); 1411 goto done; 1412 } 1413 } 1414 1415 map = &vm->vmspace->vm_map; 1416 rv = vm_fault(map, vme->u.paging.gpa, ftype, VM_FAULT_NORMAL); 1417 1418 VCPU_CTR3(vm, vcpuid, "vm_handle_paging rv = %d, gpa = %#lx, " 1419 "ftype = %d", rv, vme->u.paging.gpa, ftype); 1420 1421 if (rv != KERN_SUCCESS) 1422 return (EFAULT); 1423 done: 1424 return (0); 1425 } 1426 1427 static int 1428 vm_handle_inst_emul(struct vm *vm, int vcpuid, bool *retu) 1429 { 1430 struct vie *vie; 1431 struct vcpu *vcpu; 1432 struct vm_exit *vme; 1433 uint64_t gla, gpa, cs_base; 1434 struct vm_guest_paging *paging; 1435 mem_region_read_t mread; 1436 mem_region_write_t mwrite; 1437 enum vm_cpu_mode cpu_mode; 1438 int cs_d, error, fault; 1439 1440 vcpu = &vm->vcpu[vcpuid]; 1441 vme = &vcpu->exitinfo; 1442 1443 KASSERT(vme->inst_length == 0, ("%s: invalid inst_length %d", 1444 __func__, vme->inst_length)); 1445 1446 gla = vme->u.inst_emul.gla; 1447 gpa = vme->u.inst_emul.gpa; 1448 cs_base = vme->u.inst_emul.cs_base; 1449 cs_d = vme->u.inst_emul.cs_d; 1450 vie = &vme->u.inst_emul.vie; 1451 paging = &vme->u.inst_emul.paging; 1452 cpu_mode = paging->cpu_mode; 1453 1454 VCPU_CTR1(vm, vcpuid, "inst_emul fault accessing gpa %#lx", gpa); 1455 1456 /* Fetch, decode and emulate the faulting instruction */ 1457 if (vie->num_valid == 0) { 1458 error = vmm_fetch_instruction(vm, vcpuid, paging, vme->rip + 1459 cs_base, VIE_INST_SIZE, vie, &fault); 1460 } else { 1461 /* 1462 * The instruction bytes have already been copied into 'vie' 1463 */ 1464 error = fault = 0; 1465 } 1466 if (error || fault) 1467 return (error); 1468 1469 if (vmm_decode_instruction(vm, vcpuid, gla, cpu_mode, cs_d, vie) != 0) { 1470 VCPU_CTR1(vm, vcpuid, "Error decoding instruction at %#lx", 1471 vme->rip + cs_base); 1472 *retu = true; /* dump instruction bytes in userspace */ 1473 return (0); 1474 } 1475 1476 /* 1477 * Update 'nextrip' based on the length of the emulated instruction. 1478 */ 1479 vme->inst_length = vie->num_processed; 1480 vcpu->nextrip += vie->num_processed; 1481 VCPU_CTR1(vm, vcpuid, "nextrip updated to %#lx after instruction " 1482 "decoding", vcpu->nextrip); 1483 1484 /* return to userland unless this is an in-kernel emulated device */ 1485 if (gpa >= DEFAULT_APIC_BASE && gpa < DEFAULT_APIC_BASE + PAGE_SIZE) { 1486 mread = lapic_mmio_read; 1487 mwrite = lapic_mmio_write; 1488 } else if (gpa >= VIOAPIC_BASE && gpa < VIOAPIC_BASE + VIOAPIC_SIZE) { 1489 mread = vioapic_mmio_read; 1490 mwrite = vioapic_mmio_write; 1491 } else if (gpa >= VHPET_BASE && gpa < VHPET_BASE + VHPET_SIZE) { 1492 mread = vhpet_mmio_read; 1493 mwrite = vhpet_mmio_write; 1494 } else { 1495 *retu = true; 1496 return (0); 1497 } 1498 1499 error = vmm_emulate_instruction(vm, vcpuid, gpa, vie, paging, 1500 mread, mwrite, retu); 1501 1502 return (error); 1503 } 1504 1505 static int 1506 vm_handle_suspend(struct vm *vm, int vcpuid, bool *retu) 1507 { 1508 int i, done; 1509 struct vcpu *vcpu; 1510 1511 done = 0; 1512 vcpu = &vm->vcpu[vcpuid]; 1513 1514 CPU_SET_ATOMIC(vcpuid, &vm->suspended_cpus); 1515 1516 /* 1517 * Wait until all 'active_cpus' have suspended themselves. 1518 * 1519 * Since a VM may be suspended at any time including when one or 1520 * more vcpus are doing a rendezvous we need to call the rendezvous 1521 * handler while we are waiting to prevent a deadlock. 1522 */ 1523 vcpu_lock(vcpu); 1524 while (1) { 1525 if (CPU_CMP(&vm->suspended_cpus, &vm->active_cpus) == 0) { 1526 VCPU_CTR0(vm, vcpuid, "All vcpus suspended"); 1527 break; 1528 } 1529 1530 if (vm->rendezvous_func == NULL) { 1531 VCPU_CTR0(vm, vcpuid, "Sleeping during suspend"); 1532 vcpu_require_state_locked(vm, vcpuid, VCPU_SLEEPING); 1533 msleep_spin(vcpu, &vcpu->mtx, "vmsusp", hz); 1534 vcpu_require_state_locked(vm, vcpuid, VCPU_FROZEN); 1535 } else { 1536 VCPU_CTR0(vm, vcpuid, "Rendezvous during suspend"); 1537 vcpu_unlock(vcpu); 1538 vm_handle_rendezvous(vm, vcpuid); 1539 vcpu_lock(vcpu); 1540 } 1541 } 1542 vcpu_unlock(vcpu); 1543 1544 /* 1545 * Wakeup the other sleeping vcpus and return to userspace. 1546 */ 1547 for (i = 0; i < vm->maxcpus; i++) { 1548 if (CPU_ISSET(i, &vm->suspended_cpus)) { 1549 vcpu_notify_event(vm, i, false); 1550 } 1551 } 1552 1553 *retu = true; 1554 return (0); 1555 } 1556 1557 static int 1558 vm_handle_reqidle(struct vm *vm, int vcpuid, bool *retu) 1559 { 1560 struct vcpu *vcpu = &vm->vcpu[vcpuid]; 1561 1562 vcpu_lock(vcpu); 1563 KASSERT(vcpu->reqidle, ("invalid vcpu reqidle %d", vcpu->reqidle)); 1564 vcpu->reqidle = 0; 1565 vcpu_unlock(vcpu); 1566 *retu = true; 1567 return (0); 1568 } 1569 1570 int 1571 vm_suspend(struct vm *vm, enum vm_suspend_how how) 1572 { 1573 int i; 1574 1575 if (how <= VM_SUSPEND_NONE || how >= VM_SUSPEND_LAST) 1576 return (EINVAL); 1577 1578 if (atomic_cmpset_int(&vm->suspend, 0, how) == 0) { 1579 VM_CTR2(vm, "virtual machine already suspended %d/%d", 1580 vm->suspend, how); 1581 return (EALREADY); 1582 } 1583 1584 VM_CTR1(vm, "virtual machine successfully suspended %d", how); 1585 1586 /* 1587 * Notify all active vcpus that they are now suspended. 1588 */ 1589 for (i = 0; i < vm->maxcpus; i++) { 1590 if (CPU_ISSET(i, &vm->active_cpus)) 1591 vcpu_notify_event(vm, i, false); 1592 } 1593 1594 return (0); 1595 } 1596 1597 void 1598 vm_exit_suspended(struct vm *vm, int vcpuid, uint64_t rip) 1599 { 1600 struct vm_exit *vmexit; 1601 1602 KASSERT(vm->suspend > VM_SUSPEND_NONE && vm->suspend < VM_SUSPEND_LAST, 1603 ("vm_exit_suspended: invalid suspend type %d", vm->suspend)); 1604 1605 vmexit = vm_exitinfo(vm, vcpuid); 1606 vmexit->rip = rip; 1607 vmexit->inst_length = 0; 1608 vmexit->exitcode = VM_EXITCODE_SUSPENDED; 1609 vmexit->u.suspended.how = vm->suspend; 1610 } 1611 1612 void 1613 vm_exit_debug(struct vm *vm, int vcpuid, uint64_t rip) 1614 { 1615 struct vm_exit *vmexit; 1616 1617 vmexit = vm_exitinfo(vm, vcpuid); 1618 vmexit->rip = rip; 1619 vmexit->inst_length = 0; 1620 vmexit->exitcode = VM_EXITCODE_DEBUG; 1621 } 1622 1623 void 1624 vm_exit_rendezvous(struct vm *vm, int vcpuid, uint64_t rip) 1625 { 1626 struct vm_exit *vmexit; 1627 1628 KASSERT(vm->rendezvous_func != NULL, ("rendezvous not in progress")); 1629 1630 vmexit = vm_exitinfo(vm, vcpuid); 1631 vmexit->rip = rip; 1632 vmexit->inst_length = 0; 1633 vmexit->exitcode = VM_EXITCODE_RENDEZVOUS; 1634 vmm_stat_incr(vm, vcpuid, VMEXIT_RENDEZVOUS, 1); 1635 } 1636 1637 void 1638 vm_exit_reqidle(struct vm *vm, int vcpuid, uint64_t rip) 1639 { 1640 struct vm_exit *vmexit; 1641 1642 vmexit = vm_exitinfo(vm, vcpuid); 1643 vmexit->rip = rip; 1644 vmexit->inst_length = 0; 1645 vmexit->exitcode = VM_EXITCODE_REQIDLE; 1646 vmm_stat_incr(vm, vcpuid, VMEXIT_REQIDLE, 1); 1647 } 1648 1649 void 1650 vm_exit_astpending(struct vm *vm, int vcpuid, uint64_t rip) 1651 { 1652 struct vm_exit *vmexit; 1653 1654 vmexit = vm_exitinfo(vm, vcpuid); 1655 vmexit->rip = rip; 1656 vmexit->inst_length = 0; 1657 vmexit->exitcode = VM_EXITCODE_BOGUS; 1658 vmm_stat_incr(vm, vcpuid, VMEXIT_ASTPENDING, 1); 1659 } 1660 1661 int 1662 vm_run(struct vm *vm, struct vm_run *vmrun) 1663 { 1664 struct vm_eventinfo evinfo; 1665 int error, vcpuid; 1666 struct vcpu *vcpu; 1667 struct pcb *pcb; 1668 uint64_t tscval; 1669 struct vm_exit *vme; 1670 bool retu, intr_disabled; 1671 pmap_t pmap; 1672 1673 vcpuid = vmrun->cpuid; 1674 1675 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 1676 return (EINVAL); 1677 1678 if (!CPU_ISSET(vcpuid, &vm->active_cpus)) 1679 return (EINVAL); 1680 1681 if (CPU_ISSET(vcpuid, &vm->suspended_cpus)) 1682 return (EINVAL); 1683 1684 pmap = vmspace_pmap(vm->vmspace); 1685 vcpu = &vm->vcpu[vcpuid]; 1686 vme = &vcpu->exitinfo; 1687 evinfo.rptr = &vm->rendezvous_func; 1688 evinfo.sptr = &vm->suspend; 1689 evinfo.iptr = &vcpu->reqidle; 1690 restart: 1691 critical_enter(); 1692 1693 KASSERT(!CPU_ISSET(curcpu, &pmap->pm_active), 1694 ("vm_run: absurd pm_active")); 1695 1696 tscval = rdtsc(); 1697 1698 pcb = PCPU_GET(curpcb); 1699 set_pcb_flags(pcb, PCB_FULL_IRET); 1700 1701 restore_guest_fpustate(vcpu); 1702 1703 vcpu_require_state(vm, vcpuid, VCPU_RUNNING); 1704 error = VMRUN(vm->cookie, vcpuid, vcpu->nextrip, pmap, &evinfo); 1705 vcpu_require_state(vm, vcpuid, VCPU_FROZEN); 1706 1707 save_guest_fpustate(vcpu); 1708 1709 vmm_stat_incr(vm, vcpuid, VCPU_TOTAL_RUNTIME, rdtsc() - tscval); 1710 1711 critical_exit(); 1712 1713 if (error == 0) { 1714 retu = false; 1715 vcpu->nextrip = vme->rip + vme->inst_length; 1716 switch (vme->exitcode) { 1717 case VM_EXITCODE_REQIDLE: 1718 error = vm_handle_reqidle(vm, vcpuid, &retu); 1719 break; 1720 case VM_EXITCODE_SUSPENDED: 1721 error = vm_handle_suspend(vm, vcpuid, &retu); 1722 break; 1723 case VM_EXITCODE_IOAPIC_EOI: 1724 vioapic_process_eoi(vm, vcpuid, 1725 vme->u.ioapic_eoi.vector); 1726 break; 1727 case VM_EXITCODE_RENDEZVOUS: 1728 vm_handle_rendezvous(vm, vcpuid); 1729 error = 0; 1730 break; 1731 case VM_EXITCODE_HLT: 1732 intr_disabled = ((vme->u.hlt.rflags & PSL_I) == 0); 1733 error = vm_handle_hlt(vm, vcpuid, intr_disabled, &retu); 1734 break; 1735 case VM_EXITCODE_PAGING: 1736 error = vm_handle_paging(vm, vcpuid, &retu); 1737 break; 1738 case VM_EXITCODE_INST_EMUL: 1739 error = vm_handle_inst_emul(vm, vcpuid, &retu); 1740 break; 1741 case VM_EXITCODE_INOUT: 1742 case VM_EXITCODE_INOUT_STR: 1743 error = vm_handle_inout(vm, vcpuid, vme, &retu); 1744 break; 1745 case VM_EXITCODE_MONITOR: 1746 case VM_EXITCODE_MWAIT: 1747 case VM_EXITCODE_VMINSN: 1748 vm_inject_ud(vm, vcpuid); 1749 break; 1750 default: 1751 retu = true; /* handled in userland */ 1752 break; 1753 } 1754 } 1755 1756 if (error == 0 && retu == false) 1757 goto restart; 1758 1759 VCPU_CTR2(vm, vcpuid, "retu %d/%d", error, vme->exitcode); 1760 1761 /* copy the exit information */ 1762 bcopy(vme, &vmrun->vm_exit, sizeof(struct vm_exit)); 1763 return (error); 1764 } 1765 1766 int 1767 vm_restart_instruction(void *arg, int vcpuid) 1768 { 1769 struct vm *vm; 1770 struct vcpu *vcpu; 1771 enum vcpu_state state; 1772 uint64_t rip; 1773 int error; 1774 1775 vm = arg; 1776 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 1777 return (EINVAL); 1778 1779 vcpu = &vm->vcpu[vcpuid]; 1780 state = vcpu_get_state(vm, vcpuid, NULL); 1781 if (state == VCPU_RUNNING) { 1782 /* 1783 * When a vcpu is "running" the next instruction is determined 1784 * by adding 'rip' and 'inst_length' in the vcpu's 'exitinfo'. 1785 * Thus setting 'inst_length' to zero will cause the current 1786 * instruction to be restarted. 1787 */ 1788 vcpu->exitinfo.inst_length = 0; 1789 VCPU_CTR1(vm, vcpuid, "restarting instruction at %#lx by " 1790 "setting inst_length to zero", vcpu->exitinfo.rip); 1791 } else if (state == VCPU_FROZEN) { 1792 /* 1793 * When a vcpu is "frozen" it is outside the critical section 1794 * around VMRUN() and 'nextrip' points to the next instruction. 1795 * Thus instruction restart is achieved by setting 'nextrip' 1796 * to the vcpu's %rip. 1797 */ 1798 error = vm_get_register(vm, vcpuid, VM_REG_GUEST_RIP, &rip); 1799 KASSERT(!error, ("%s: error %d getting rip", __func__, error)); 1800 VCPU_CTR2(vm, vcpuid, "restarting instruction by updating " 1801 "nextrip from %#lx to %#lx", vcpu->nextrip, rip); 1802 vcpu->nextrip = rip; 1803 } else { 1804 panic("%s: invalid state %d", __func__, state); 1805 } 1806 return (0); 1807 } 1808 1809 int 1810 vm_exit_intinfo(struct vm *vm, int vcpuid, uint64_t info) 1811 { 1812 struct vcpu *vcpu; 1813 int type, vector; 1814 1815 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 1816 return (EINVAL); 1817 1818 vcpu = &vm->vcpu[vcpuid]; 1819 1820 if (info & VM_INTINFO_VALID) { 1821 type = info & VM_INTINFO_TYPE; 1822 vector = info & 0xff; 1823 if (type == VM_INTINFO_NMI && vector != IDT_NMI) 1824 return (EINVAL); 1825 if (type == VM_INTINFO_HWEXCEPTION && vector >= 32) 1826 return (EINVAL); 1827 if (info & VM_INTINFO_RSVD) 1828 return (EINVAL); 1829 } else { 1830 info = 0; 1831 } 1832 VCPU_CTR2(vm, vcpuid, "%s: info1(%#lx)", __func__, info); 1833 vcpu->exitintinfo = info; 1834 return (0); 1835 } 1836 1837 enum exc_class { 1838 EXC_BENIGN, 1839 EXC_CONTRIBUTORY, 1840 EXC_PAGEFAULT 1841 }; 1842 1843 #define IDT_VE 20 /* Virtualization Exception (Intel specific) */ 1844 1845 static enum exc_class 1846 exception_class(uint64_t info) 1847 { 1848 int type, vector; 1849 1850 KASSERT(info & VM_INTINFO_VALID, ("intinfo must be valid: %#lx", info)); 1851 type = info & VM_INTINFO_TYPE; 1852 vector = info & 0xff; 1853 1854 /* Table 6-4, "Interrupt and Exception Classes", Intel SDM, Vol 3 */ 1855 switch (type) { 1856 case VM_INTINFO_HWINTR: 1857 case VM_INTINFO_SWINTR: 1858 case VM_INTINFO_NMI: 1859 return (EXC_BENIGN); 1860 default: 1861 /* 1862 * Hardware exception. 1863 * 1864 * SVM and VT-x use identical type values to represent NMI, 1865 * hardware interrupt and software interrupt. 1866 * 1867 * SVM uses type '3' for all exceptions. VT-x uses type '3' 1868 * for exceptions except #BP and #OF. #BP and #OF use a type 1869 * value of '5' or '6'. Therefore we don't check for explicit 1870 * values of 'type' to classify 'intinfo' into a hardware 1871 * exception. 1872 */ 1873 break; 1874 } 1875 1876 switch (vector) { 1877 case IDT_PF: 1878 case IDT_VE: 1879 return (EXC_PAGEFAULT); 1880 case IDT_DE: 1881 case IDT_TS: 1882 case IDT_NP: 1883 case IDT_SS: 1884 case IDT_GP: 1885 return (EXC_CONTRIBUTORY); 1886 default: 1887 return (EXC_BENIGN); 1888 } 1889 } 1890 1891 static int 1892 nested_fault(struct vm *vm, int vcpuid, uint64_t info1, uint64_t info2, 1893 uint64_t *retinfo) 1894 { 1895 enum exc_class exc1, exc2; 1896 int type1, vector1; 1897 1898 KASSERT(info1 & VM_INTINFO_VALID, ("info1 %#lx is not valid", info1)); 1899 KASSERT(info2 & VM_INTINFO_VALID, ("info2 %#lx is not valid", info2)); 1900 1901 /* 1902 * If an exception occurs while attempting to call the double-fault 1903 * handler the processor enters shutdown mode (aka triple fault). 1904 */ 1905 type1 = info1 & VM_INTINFO_TYPE; 1906 vector1 = info1 & 0xff; 1907 if (type1 == VM_INTINFO_HWEXCEPTION && vector1 == IDT_DF) { 1908 VCPU_CTR2(vm, vcpuid, "triple fault: info1(%#lx), info2(%#lx)", 1909 info1, info2); 1910 vm_suspend(vm, VM_SUSPEND_TRIPLEFAULT); 1911 *retinfo = 0; 1912 return (0); 1913 } 1914 1915 /* 1916 * Table 6-5 "Conditions for Generating a Double Fault", Intel SDM, Vol3 1917 */ 1918 exc1 = exception_class(info1); 1919 exc2 = exception_class(info2); 1920 if ((exc1 == EXC_CONTRIBUTORY && exc2 == EXC_CONTRIBUTORY) || 1921 (exc1 == EXC_PAGEFAULT && exc2 != EXC_BENIGN)) { 1922 /* Convert nested fault into a double fault. */ 1923 *retinfo = IDT_DF; 1924 *retinfo |= VM_INTINFO_VALID | VM_INTINFO_HWEXCEPTION; 1925 *retinfo |= VM_INTINFO_DEL_ERRCODE; 1926 } else { 1927 /* Handle exceptions serially */ 1928 *retinfo = info2; 1929 } 1930 return (1); 1931 } 1932 1933 static uint64_t 1934 vcpu_exception_intinfo(struct vcpu *vcpu) 1935 { 1936 uint64_t info = 0; 1937 1938 if (vcpu->exception_pending) { 1939 info = vcpu->exc_vector & 0xff; 1940 info |= VM_INTINFO_VALID | VM_INTINFO_HWEXCEPTION; 1941 if (vcpu->exc_errcode_valid) { 1942 info |= VM_INTINFO_DEL_ERRCODE; 1943 info |= (uint64_t)vcpu->exc_errcode << 32; 1944 } 1945 } 1946 return (info); 1947 } 1948 1949 int 1950 vm_entry_intinfo(struct vm *vm, int vcpuid, uint64_t *retinfo) 1951 { 1952 struct vcpu *vcpu; 1953 uint64_t info1, info2; 1954 int valid; 1955 1956 KASSERT(vcpuid >= 0 && 1957 vcpuid < vm->maxcpus, ("invalid vcpu %d", vcpuid)); 1958 1959 vcpu = &vm->vcpu[vcpuid]; 1960 1961 info1 = vcpu->exitintinfo; 1962 vcpu->exitintinfo = 0; 1963 1964 info2 = 0; 1965 if (vcpu->exception_pending) { 1966 info2 = vcpu_exception_intinfo(vcpu); 1967 vcpu->exception_pending = 0; 1968 VCPU_CTR2(vm, vcpuid, "Exception %d delivered: %#lx", 1969 vcpu->exc_vector, info2); 1970 } 1971 1972 if ((info1 & VM_INTINFO_VALID) && (info2 & VM_INTINFO_VALID)) { 1973 valid = nested_fault(vm, vcpuid, info1, info2, retinfo); 1974 } else if (info1 & VM_INTINFO_VALID) { 1975 *retinfo = info1; 1976 valid = 1; 1977 } else if (info2 & VM_INTINFO_VALID) { 1978 *retinfo = info2; 1979 valid = 1; 1980 } else { 1981 valid = 0; 1982 } 1983 1984 if (valid) { 1985 VCPU_CTR4(vm, vcpuid, "%s: info1(%#lx), info2(%#lx), " 1986 "retinfo(%#lx)", __func__, info1, info2, *retinfo); 1987 } 1988 1989 return (valid); 1990 } 1991 1992 int 1993 vm_get_intinfo(struct vm *vm, int vcpuid, uint64_t *info1, uint64_t *info2) 1994 { 1995 struct vcpu *vcpu; 1996 1997 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 1998 return (EINVAL); 1999 2000 vcpu = &vm->vcpu[vcpuid]; 2001 *info1 = vcpu->exitintinfo; 2002 *info2 = vcpu_exception_intinfo(vcpu); 2003 return (0); 2004 } 2005 2006 int 2007 vm_inject_exception(struct vm *vm, int vcpuid, int vector, int errcode_valid, 2008 uint32_t errcode, int restart_instruction) 2009 { 2010 struct vcpu *vcpu; 2011 uint64_t regval; 2012 int error; 2013 2014 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2015 return (EINVAL); 2016 2017 if (vector < 0 || vector >= 32) 2018 return (EINVAL); 2019 2020 /* 2021 * A double fault exception should never be injected directly into 2022 * the guest. It is a derived exception that results from specific 2023 * combinations of nested faults. 2024 */ 2025 if (vector == IDT_DF) 2026 return (EINVAL); 2027 2028 vcpu = &vm->vcpu[vcpuid]; 2029 2030 if (vcpu->exception_pending) { 2031 VCPU_CTR2(vm, vcpuid, "Unable to inject exception %d due to " 2032 "pending exception %d", vector, vcpu->exc_vector); 2033 return (EBUSY); 2034 } 2035 2036 if (errcode_valid) { 2037 /* 2038 * Exceptions don't deliver an error code in real mode. 2039 */ 2040 error = vm_get_register(vm, vcpuid, VM_REG_GUEST_CR0, ®val); 2041 KASSERT(!error, ("%s: error %d getting CR0", __func__, error)); 2042 if (!(regval & CR0_PE)) 2043 errcode_valid = 0; 2044 } 2045 2046 /* 2047 * From section 26.6.1 "Interruptibility State" in Intel SDM: 2048 * 2049 * Event blocking by "STI" or "MOV SS" is cleared after guest executes 2050 * one instruction or incurs an exception. 2051 */ 2052 error = vm_set_register(vm, vcpuid, VM_REG_GUEST_INTR_SHADOW, 0); 2053 KASSERT(error == 0, ("%s: error %d clearing interrupt shadow", 2054 __func__, error)); 2055 2056 if (restart_instruction) 2057 vm_restart_instruction(vm, vcpuid); 2058 2059 vcpu->exception_pending = 1; 2060 vcpu->exc_vector = vector; 2061 vcpu->exc_errcode = errcode; 2062 vcpu->exc_errcode_valid = errcode_valid; 2063 VCPU_CTR1(vm, vcpuid, "Exception %d pending", vector); 2064 return (0); 2065 } 2066 2067 void 2068 vm_inject_fault(void *vmarg, int vcpuid, int vector, int errcode_valid, 2069 int errcode) 2070 { 2071 struct vm *vm; 2072 int error, restart_instruction; 2073 2074 vm = vmarg; 2075 restart_instruction = 1; 2076 2077 error = vm_inject_exception(vm, vcpuid, vector, errcode_valid, 2078 errcode, restart_instruction); 2079 KASSERT(error == 0, ("vm_inject_exception error %d", error)); 2080 } 2081 2082 void 2083 vm_inject_pf(void *vmarg, int vcpuid, int error_code, uint64_t cr2) 2084 { 2085 struct vm *vm; 2086 int error; 2087 2088 vm = vmarg; 2089 VCPU_CTR2(vm, vcpuid, "Injecting page fault: error_code %#x, cr2 %#lx", 2090 error_code, cr2); 2091 2092 error = vm_set_register(vm, vcpuid, VM_REG_GUEST_CR2, cr2); 2093 KASSERT(error == 0, ("vm_set_register(cr2) error %d", error)); 2094 2095 vm_inject_fault(vm, vcpuid, IDT_PF, 1, error_code); 2096 } 2097 2098 static VMM_STAT(VCPU_NMI_COUNT, "number of NMIs delivered to vcpu"); 2099 2100 int 2101 vm_inject_nmi(struct vm *vm, int vcpuid) 2102 { 2103 struct vcpu *vcpu; 2104 2105 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2106 return (EINVAL); 2107 2108 vcpu = &vm->vcpu[vcpuid]; 2109 2110 vcpu->nmi_pending = 1; 2111 vcpu_notify_event(vm, vcpuid, false); 2112 return (0); 2113 } 2114 2115 int 2116 vm_nmi_pending(struct vm *vm, int vcpuid) 2117 { 2118 struct vcpu *vcpu; 2119 2120 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2121 panic("vm_nmi_pending: invalid vcpuid %d", vcpuid); 2122 2123 vcpu = &vm->vcpu[vcpuid]; 2124 2125 return (vcpu->nmi_pending); 2126 } 2127 2128 void 2129 vm_nmi_clear(struct vm *vm, int vcpuid) 2130 { 2131 struct vcpu *vcpu; 2132 2133 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2134 panic("vm_nmi_pending: invalid vcpuid %d", vcpuid); 2135 2136 vcpu = &vm->vcpu[vcpuid]; 2137 2138 if (vcpu->nmi_pending == 0) 2139 panic("vm_nmi_clear: inconsistent nmi_pending state"); 2140 2141 vcpu->nmi_pending = 0; 2142 vmm_stat_incr(vm, vcpuid, VCPU_NMI_COUNT, 1); 2143 } 2144 2145 static VMM_STAT(VCPU_EXTINT_COUNT, "number of ExtINTs delivered to vcpu"); 2146 2147 int 2148 vm_inject_extint(struct vm *vm, int vcpuid) 2149 { 2150 struct vcpu *vcpu; 2151 2152 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2153 return (EINVAL); 2154 2155 vcpu = &vm->vcpu[vcpuid]; 2156 2157 vcpu->extint_pending = 1; 2158 vcpu_notify_event(vm, vcpuid, false); 2159 return (0); 2160 } 2161 2162 int 2163 vm_extint_pending(struct vm *vm, int vcpuid) 2164 { 2165 struct vcpu *vcpu; 2166 2167 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2168 panic("vm_extint_pending: invalid vcpuid %d", vcpuid); 2169 2170 vcpu = &vm->vcpu[vcpuid]; 2171 2172 return (vcpu->extint_pending); 2173 } 2174 2175 void 2176 vm_extint_clear(struct vm *vm, int vcpuid) 2177 { 2178 struct vcpu *vcpu; 2179 2180 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2181 panic("vm_extint_pending: invalid vcpuid %d", vcpuid); 2182 2183 vcpu = &vm->vcpu[vcpuid]; 2184 2185 if (vcpu->extint_pending == 0) 2186 panic("vm_extint_clear: inconsistent extint_pending state"); 2187 2188 vcpu->extint_pending = 0; 2189 vmm_stat_incr(vm, vcpuid, VCPU_EXTINT_COUNT, 1); 2190 } 2191 2192 int 2193 vm_get_capability(struct vm *vm, int vcpu, int type, int *retval) 2194 { 2195 if (vcpu < 0 || vcpu >= vm->maxcpus) 2196 return (EINVAL); 2197 2198 if (type < 0 || type >= VM_CAP_MAX) 2199 return (EINVAL); 2200 2201 return (VMGETCAP(vm->cookie, vcpu, type, retval)); 2202 } 2203 2204 int 2205 vm_set_capability(struct vm *vm, int vcpu, int type, int val) 2206 { 2207 if (vcpu < 0 || vcpu >= vm->maxcpus) 2208 return (EINVAL); 2209 2210 if (type < 0 || type >= VM_CAP_MAX) 2211 return (EINVAL); 2212 2213 return (VMSETCAP(vm->cookie, vcpu, type, val)); 2214 } 2215 2216 struct vlapic * 2217 vm_lapic(struct vm *vm, int cpu) 2218 { 2219 return (vm->vcpu[cpu].vlapic); 2220 } 2221 2222 struct vioapic * 2223 vm_ioapic(struct vm *vm) 2224 { 2225 2226 return (vm->vioapic); 2227 } 2228 2229 struct vhpet * 2230 vm_hpet(struct vm *vm) 2231 { 2232 2233 return (vm->vhpet); 2234 } 2235 2236 boolean_t 2237 vmm_is_pptdev(int bus, int slot, int func) 2238 { 2239 int found, i, n; 2240 int b, s, f; 2241 char *val, *cp, *cp2; 2242 2243 /* 2244 * XXX 2245 * The length of an environment variable is limited to 128 bytes which 2246 * puts an upper limit on the number of passthru devices that may be 2247 * specified using a single environment variable. 2248 * 2249 * Work around this by scanning multiple environment variable 2250 * names instead of a single one - yuck! 2251 */ 2252 const char *names[] = { "pptdevs", "pptdevs2", "pptdevs3", NULL }; 2253 2254 /* set pptdevs="1/2/3 4/5/6 7/8/9 10/11/12" */ 2255 found = 0; 2256 for (i = 0; names[i] != NULL && !found; i++) { 2257 cp = val = kern_getenv(names[i]); 2258 while (cp != NULL && *cp != '\0') { 2259 if ((cp2 = strchr(cp, ' ')) != NULL) 2260 *cp2 = '\0'; 2261 2262 n = sscanf(cp, "%d/%d/%d", &b, &s, &f); 2263 if (n == 3 && bus == b && slot == s && func == f) { 2264 found = 1; 2265 break; 2266 } 2267 2268 if (cp2 != NULL) 2269 *cp2++ = ' '; 2270 2271 cp = cp2; 2272 } 2273 freeenv(val); 2274 } 2275 return (found); 2276 } 2277 2278 void * 2279 vm_iommu_domain(struct vm *vm) 2280 { 2281 2282 return (vm->iommu); 2283 } 2284 2285 int 2286 vcpu_set_state(struct vm *vm, int vcpuid, enum vcpu_state newstate, 2287 bool from_idle) 2288 { 2289 int error; 2290 struct vcpu *vcpu; 2291 2292 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2293 panic("vm_set_run_state: invalid vcpuid %d", vcpuid); 2294 2295 vcpu = &vm->vcpu[vcpuid]; 2296 2297 vcpu_lock(vcpu); 2298 error = vcpu_set_state_locked(vm, vcpuid, newstate, from_idle); 2299 vcpu_unlock(vcpu); 2300 2301 return (error); 2302 } 2303 2304 enum vcpu_state 2305 vcpu_get_state(struct vm *vm, int vcpuid, int *hostcpu) 2306 { 2307 struct vcpu *vcpu; 2308 enum vcpu_state state; 2309 2310 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2311 panic("vm_get_run_state: invalid vcpuid %d", vcpuid); 2312 2313 vcpu = &vm->vcpu[vcpuid]; 2314 2315 vcpu_lock(vcpu); 2316 state = vcpu->state; 2317 if (hostcpu != NULL) 2318 *hostcpu = vcpu->hostcpu; 2319 vcpu_unlock(vcpu); 2320 2321 return (state); 2322 } 2323 2324 int 2325 vm_activate_cpu(struct vm *vm, int vcpuid) 2326 { 2327 2328 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2329 return (EINVAL); 2330 2331 if (CPU_ISSET(vcpuid, &vm->active_cpus)) 2332 return (EBUSY); 2333 2334 VCPU_CTR0(vm, vcpuid, "activated"); 2335 CPU_SET_ATOMIC(vcpuid, &vm->active_cpus); 2336 return (0); 2337 } 2338 2339 int 2340 vm_suspend_cpu(struct vm *vm, int vcpuid) 2341 { 2342 int i; 2343 2344 if (vcpuid < -1 || vcpuid >= vm->maxcpus) 2345 return (EINVAL); 2346 2347 if (vcpuid == -1) { 2348 vm->debug_cpus = vm->active_cpus; 2349 for (i = 0; i < vm->maxcpus; i++) { 2350 if (CPU_ISSET(i, &vm->active_cpus)) 2351 vcpu_notify_event(vm, i, false); 2352 } 2353 } else { 2354 if (!CPU_ISSET(vcpuid, &vm->active_cpus)) 2355 return (EINVAL); 2356 2357 CPU_SET_ATOMIC(vcpuid, &vm->debug_cpus); 2358 vcpu_notify_event(vm, vcpuid, false); 2359 } 2360 return (0); 2361 } 2362 2363 int 2364 vm_resume_cpu(struct vm *vm, int vcpuid) 2365 { 2366 2367 if (vcpuid < -1 || vcpuid >= vm->maxcpus) 2368 return (EINVAL); 2369 2370 if (vcpuid == -1) { 2371 CPU_ZERO(&vm->debug_cpus); 2372 } else { 2373 if (!CPU_ISSET(vcpuid, &vm->debug_cpus)) 2374 return (EINVAL); 2375 2376 CPU_CLR_ATOMIC(vcpuid, &vm->debug_cpus); 2377 } 2378 return (0); 2379 } 2380 2381 int 2382 vcpu_debugged(struct vm *vm, int vcpuid) 2383 { 2384 2385 return (CPU_ISSET(vcpuid, &vm->debug_cpus)); 2386 } 2387 2388 cpuset_t 2389 vm_active_cpus(struct vm *vm) 2390 { 2391 2392 return (vm->active_cpus); 2393 } 2394 2395 cpuset_t 2396 vm_debug_cpus(struct vm *vm) 2397 { 2398 2399 return (vm->debug_cpus); 2400 } 2401 2402 cpuset_t 2403 vm_suspended_cpus(struct vm *vm) 2404 { 2405 2406 return (vm->suspended_cpus); 2407 } 2408 2409 void * 2410 vcpu_stats(struct vm *vm, int vcpuid) 2411 { 2412 2413 return (vm->vcpu[vcpuid].stats); 2414 } 2415 2416 int 2417 vm_get_x2apic_state(struct vm *vm, int vcpuid, enum x2apic_state *state) 2418 { 2419 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2420 return (EINVAL); 2421 2422 *state = vm->vcpu[vcpuid].x2apic_state; 2423 2424 return (0); 2425 } 2426 2427 int 2428 vm_set_x2apic_state(struct vm *vm, int vcpuid, enum x2apic_state state) 2429 { 2430 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2431 return (EINVAL); 2432 2433 if (state >= X2APIC_STATE_LAST) 2434 return (EINVAL); 2435 2436 vm->vcpu[vcpuid].x2apic_state = state; 2437 2438 vlapic_set_x2apic_state(vm, vcpuid, state); 2439 2440 return (0); 2441 } 2442 2443 /* 2444 * This function is called to ensure that a vcpu "sees" a pending event 2445 * as soon as possible: 2446 * - If the vcpu thread is sleeping then it is woken up. 2447 * - If the vcpu is running on a different host_cpu then an IPI will be directed 2448 * to the host_cpu to cause the vcpu to trap into the hypervisor. 2449 */ 2450 static void 2451 vcpu_notify_event_locked(struct vcpu *vcpu, bool lapic_intr) 2452 { 2453 int hostcpu; 2454 2455 hostcpu = vcpu->hostcpu; 2456 if (vcpu->state == VCPU_RUNNING) { 2457 KASSERT(hostcpu != NOCPU, ("vcpu running on invalid hostcpu")); 2458 if (hostcpu != curcpu) { 2459 if (lapic_intr) { 2460 vlapic_post_intr(vcpu->vlapic, hostcpu, 2461 vmm_ipinum); 2462 } else { 2463 ipi_cpu(hostcpu, vmm_ipinum); 2464 } 2465 } else { 2466 /* 2467 * If the 'vcpu' is running on 'curcpu' then it must 2468 * be sending a notification to itself (e.g. SELF_IPI). 2469 * The pending event will be picked up when the vcpu 2470 * transitions back to guest context. 2471 */ 2472 } 2473 } else { 2474 KASSERT(hostcpu == NOCPU, ("vcpu state %d not consistent " 2475 "with hostcpu %d", vcpu->state, hostcpu)); 2476 if (vcpu->state == VCPU_SLEEPING) 2477 wakeup_one(vcpu); 2478 } 2479 } 2480 2481 void 2482 vcpu_notify_event(struct vm *vm, int vcpuid, bool lapic_intr) 2483 { 2484 struct vcpu *vcpu = &vm->vcpu[vcpuid]; 2485 2486 vcpu_lock(vcpu); 2487 vcpu_notify_event_locked(vcpu, lapic_intr); 2488 vcpu_unlock(vcpu); 2489 } 2490 2491 struct vmspace * 2492 vm_get_vmspace(struct vm *vm) 2493 { 2494 2495 return (vm->vmspace); 2496 } 2497 2498 int 2499 vm_apicid2vcpuid(struct vm *vm, int apicid) 2500 { 2501 /* 2502 * XXX apic id is assumed to be numerically identical to vcpu id 2503 */ 2504 return (apicid); 2505 } 2506 2507 void 2508 vm_smp_rendezvous(struct vm *vm, int vcpuid, cpuset_t dest, 2509 vm_rendezvous_func_t func, void *arg) 2510 { 2511 int i; 2512 2513 /* 2514 * Enforce that this function is called without any locks 2515 */ 2516 WITNESS_WARN(WARN_PANIC, NULL, "vm_smp_rendezvous"); 2517 KASSERT(vcpuid == -1 || (vcpuid >= 0 && vcpuid < vm->maxcpus), 2518 ("vm_smp_rendezvous: invalid vcpuid %d", vcpuid)); 2519 2520 restart: 2521 mtx_lock(&vm->rendezvous_mtx); 2522 if (vm->rendezvous_func != NULL) { 2523 /* 2524 * If a rendezvous is already in progress then we need to 2525 * call the rendezvous handler in case this 'vcpuid' is one 2526 * of the targets of the rendezvous. 2527 */ 2528 RENDEZVOUS_CTR0(vm, vcpuid, "Rendezvous already in progress"); 2529 mtx_unlock(&vm->rendezvous_mtx); 2530 vm_handle_rendezvous(vm, vcpuid); 2531 goto restart; 2532 } 2533 KASSERT(vm->rendezvous_func == NULL, ("vm_smp_rendezvous: previous " 2534 "rendezvous is still in progress")); 2535 2536 RENDEZVOUS_CTR0(vm, vcpuid, "Initiating rendezvous"); 2537 vm->rendezvous_req_cpus = dest; 2538 CPU_ZERO(&vm->rendezvous_done_cpus); 2539 vm->rendezvous_arg = arg; 2540 vm_set_rendezvous_func(vm, func); 2541 mtx_unlock(&vm->rendezvous_mtx); 2542 2543 /* 2544 * Wake up any sleeping vcpus and trigger a VM-exit in any running 2545 * vcpus so they handle the rendezvous as soon as possible. 2546 */ 2547 for (i = 0; i < vm->maxcpus; i++) { 2548 if (CPU_ISSET(i, &dest)) 2549 vcpu_notify_event(vm, i, false); 2550 } 2551 2552 vm_handle_rendezvous(vm, vcpuid); 2553 } 2554 2555 struct vatpic * 2556 vm_atpic(struct vm *vm) 2557 { 2558 return (vm->vatpic); 2559 } 2560 2561 struct vatpit * 2562 vm_atpit(struct vm *vm) 2563 { 2564 return (vm->vatpit); 2565 } 2566 2567 struct vpmtmr * 2568 vm_pmtmr(struct vm *vm) 2569 { 2570 2571 return (vm->vpmtmr); 2572 } 2573 2574 struct vrtc * 2575 vm_rtc(struct vm *vm) 2576 { 2577 2578 return (vm->vrtc); 2579 } 2580 2581 enum vm_reg_name 2582 vm_segment_name(int seg) 2583 { 2584 static enum vm_reg_name seg_names[] = { 2585 VM_REG_GUEST_ES, 2586 VM_REG_GUEST_CS, 2587 VM_REG_GUEST_SS, 2588 VM_REG_GUEST_DS, 2589 VM_REG_GUEST_FS, 2590 VM_REG_GUEST_GS 2591 }; 2592 2593 KASSERT(seg >= 0 && seg < nitems(seg_names), 2594 ("%s: invalid segment encoding %d", __func__, seg)); 2595 return (seg_names[seg]); 2596 } 2597 2598 void 2599 vm_copy_teardown(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo, 2600 int num_copyinfo) 2601 { 2602 int idx; 2603 2604 for (idx = 0; idx < num_copyinfo; idx++) { 2605 if (copyinfo[idx].cookie != NULL) 2606 vm_gpa_release(copyinfo[idx].cookie); 2607 } 2608 bzero(copyinfo, num_copyinfo * sizeof(struct vm_copyinfo)); 2609 } 2610 2611 int 2612 vm_copy_setup(struct vm *vm, int vcpuid, struct vm_guest_paging *paging, 2613 uint64_t gla, size_t len, int prot, struct vm_copyinfo *copyinfo, 2614 int num_copyinfo, int *fault) 2615 { 2616 int error, idx, nused; 2617 size_t n, off, remaining; 2618 void *hva, *cookie; 2619 uint64_t gpa; 2620 2621 bzero(copyinfo, sizeof(struct vm_copyinfo) * num_copyinfo); 2622 2623 nused = 0; 2624 remaining = len; 2625 while (remaining > 0) { 2626 KASSERT(nused < num_copyinfo, ("insufficient vm_copyinfo")); 2627 error = vm_gla2gpa(vm, vcpuid, paging, gla, prot, &gpa, fault); 2628 if (error || *fault) 2629 return (error); 2630 off = gpa & PAGE_MASK; 2631 n = min(remaining, PAGE_SIZE - off); 2632 copyinfo[nused].gpa = gpa; 2633 copyinfo[nused].len = n; 2634 remaining -= n; 2635 gla += n; 2636 nused++; 2637 } 2638 2639 for (idx = 0; idx < nused; idx++) { 2640 hva = vm_gpa_hold(vm, vcpuid, copyinfo[idx].gpa, 2641 copyinfo[idx].len, prot, &cookie); 2642 if (hva == NULL) 2643 break; 2644 copyinfo[idx].hva = hva; 2645 copyinfo[idx].cookie = cookie; 2646 } 2647 2648 if (idx != nused) { 2649 vm_copy_teardown(vm, vcpuid, copyinfo, num_copyinfo); 2650 return (EFAULT); 2651 } else { 2652 *fault = 0; 2653 return (0); 2654 } 2655 } 2656 2657 void 2658 vm_copyin(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo, void *kaddr, 2659 size_t len) 2660 { 2661 char *dst; 2662 int idx; 2663 2664 dst = kaddr; 2665 idx = 0; 2666 while (len > 0) { 2667 bcopy(copyinfo[idx].hva, dst, copyinfo[idx].len); 2668 len -= copyinfo[idx].len; 2669 dst += copyinfo[idx].len; 2670 idx++; 2671 } 2672 } 2673 2674 void 2675 vm_copyout(struct vm *vm, int vcpuid, const void *kaddr, 2676 struct vm_copyinfo *copyinfo, size_t len) 2677 { 2678 const char *src; 2679 int idx; 2680 2681 src = kaddr; 2682 idx = 0; 2683 while (len > 0) { 2684 bcopy(src, copyinfo[idx].hva, copyinfo[idx].len); 2685 len -= copyinfo[idx].len; 2686 src += copyinfo[idx].len; 2687 idx++; 2688 } 2689 } 2690 2691 /* 2692 * Return the amount of in-use and wired memory for the VM. Since 2693 * these are global stats, only return the values with for vCPU 0 2694 */ 2695 VMM_STAT_DECLARE(VMM_MEM_RESIDENT); 2696 VMM_STAT_DECLARE(VMM_MEM_WIRED); 2697 2698 static void 2699 vm_get_rescnt(struct vm *vm, int vcpu, struct vmm_stat_type *stat) 2700 { 2701 2702 if (vcpu == 0) { 2703 vmm_stat_set(vm, vcpu, VMM_MEM_RESIDENT, 2704 PAGE_SIZE * vmspace_resident_count(vm->vmspace)); 2705 } 2706 } 2707 2708 static void 2709 vm_get_wiredcnt(struct vm *vm, int vcpu, struct vmm_stat_type *stat) 2710 { 2711 2712 if (vcpu == 0) { 2713 vmm_stat_set(vm, vcpu, VMM_MEM_WIRED, 2714 PAGE_SIZE * pmap_wired_count(vmspace_pmap(vm->vmspace))); 2715 } 2716 } 2717 2718 VMM_STAT_FUNC(VMM_MEM_RESIDENT, "Resident memory", vm_get_rescnt); 2719 VMM_STAT_FUNC(VMM_MEM_WIRED, "Wired memory", vm_get_wiredcnt); 2720