Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/amd64/vmm/vmm.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
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+1]; /* (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_svm()) 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 || strnlen(name, VM_MAX_NAMELEN + 1) == 455 VM_MAX_NAMELEN + 1) 456 return (EINVAL); 457 458 vmspace = VMSPACE_ALLOC(0, VM_MAXUSER_ADDRESS); 459 if (vmspace == NULL) 460 return (ENOMEM); 461 462 vm = malloc(sizeof(struct vm), M_VM, M_WAITOK | M_ZERO); 463 strcpy(vm->name, name); 464 vm->vmspace = vmspace; 465 mtx_init(&vm->rendezvous_mtx, "vm rendezvous lock", 0, MTX_DEF); 466 467 vm->sockets = 1; 468 vm->cores = cores_per_package; /* XXX backwards compatibility */ 469 vm->threads = threads_per_core; /* XXX backwards compatibility */ 470 vm->maxcpus = VM_MAXCPU; /* XXX temp to keep code working */ 471 472 vm_init(vm, true); 473 474 *retvm = vm; 475 return (0); 476 } 477 478 void 479 vm_get_topology(struct vm *vm, uint16_t *sockets, uint16_t *cores, 480 uint16_t *threads, uint16_t *maxcpus) 481 { 482 *sockets = vm->sockets; 483 *cores = vm->cores; 484 *threads = vm->threads; 485 *maxcpus = vm->maxcpus; 486 } 487 488 uint16_t 489 vm_get_maxcpus(struct vm *vm) 490 { 491 return (vm->maxcpus); 492 } 493 494 int 495 vm_set_topology(struct vm *vm, uint16_t sockets, uint16_t cores, 496 uint16_t threads, uint16_t maxcpus) 497 { 498 if (maxcpus != 0) 499 return (EINVAL); /* XXX remove when supported */ 500 if ((sockets * cores * threads) > vm->maxcpus) 501 return (EINVAL); 502 /* XXX need to check sockets * cores * threads == vCPU, how? */ 503 vm->sockets = sockets; 504 vm->cores = cores; 505 vm->threads = threads; 506 vm->maxcpus = VM_MAXCPU; /* XXX temp to keep code working */ 507 return(0); 508 } 509 510 static void 511 vm_cleanup(struct vm *vm, bool destroy) 512 { 513 struct mem_map *mm; 514 int i; 515 516 ppt_unassign_all(vm); 517 518 if (vm->iommu != NULL) 519 iommu_destroy_domain(vm->iommu); 520 521 if (destroy) 522 vrtc_cleanup(vm->vrtc); 523 else 524 vrtc_reset(vm->vrtc); 525 vpmtmr_cleanup(vm->vpmtmr); 526 vatpit_cleanup(vm->vatpit); 527 vhpet_cleanup(vm->vhpet); 528 vatpic_cleanup(vm->vatpic); 529 vioapic_cleanup(vm->vioapic); 530 531 for (i = 0; i < vm->maxcpus; i++) 532 vcpu_cleanup(vm, i, destroy); 533 534 VMCLEANUP(vm->cookie); 535 536 /* 537 * System memory is removed from the guest address space only when 538 * the VM is destroyed. This is because the mapping remains the same 539 * across VM reset. 540 * 541 * Device memory can be relocated by the guest (e.g. using PCI BARs) 542 * so those mappings are removed on a VM reset. 543 */ 544 for (i = 0; i < VM_MAX_MEMMAPS; i++) { 545 mm = &vm->mem_maps[i]; 546 if (destroy || !sysmem_mapping(vm, mm)) 547 vm_free_memmap(vm, i); 548 } 549 550 if (destroy) { 551 for (i = 0; i < VM_MAX_MEMSEGS; i++) 552 vm_free_memseg(vm, i); 553 554 VMSPACE_FREE(vm->vmspace); 555 vm->vmspace = NULL; 556 } 557 } 558 559 void 560 vm_destroy(struct vm *vm) 561 { 562 vm_cleanup(vm, true); 563 free(vm, M_VM); 564 } 565 566 int 567 vm_reinit(struct vm *vm) 568 { 569 int error; 570 571 /* 572 * A virtual machine can be reset only if all vcpus are suspended. 573 */ 574 if (CPU_CMP(&vm->suspended_cpus, &vm->active_cpus) == 0) { 575 vm_cleanup(vm, false); 576 vm_init(vm, false); 577 error = 0; 578 } else { 579 error = EBUSY; 580 } 581 582 return (error); 583 } 584 585 const char * 586 vm_name(struct vm *vm) 587 { 588 return (vm->name); 589 } 590 591 int 592 vm_map_mmio(struct vm *vm, vm_paddr_t gpa, size_t len, vm_paddr_t hpa) 593 { 594 vm_object_t obj; 595 596 if ((obj = vmm_mmio_alloc(vm->vmspace, gpa, len, hpa)) == NULL) 597 return (ENOMEM); 598 else 599 return (0); 600 } 601 602 int 603 vm_unmap_mmio(struct vm *vm, vm_paddr_t gpa, size_t len) 604 { 605 606 vmm_mmio_free(vm->vmspace, gpa, len); 607 return (0); 608 } 609 610 /* 611 * Return 'true' if 'gpa' is allocated in the guest address space. 612 * 613 * This function is called in the context of a running vcpu which acts as 614 * an implicit lock on 'vm->mem_maps[]'. 615 */ 616 bool 617 vm_mem_allocated(struct vm *vm, int vcpuid, vm_paddr_t gpa) 618 { 619 struct mem_map *mm; 620 int i; 621 622 #ifdef INVARIANTS 623 int hostcpu, state; 624 state = vcpu_get_state(vm, vcpuid, &hostcpu); 625 KASSERT(state == VCPU_RUNNING && hostcpu == curcpu, 626 ("%s: invalid vcpu state %d/%d", __func__, state, hostcpu)); 627 #endif 628 629 for (i = 0; i < VM_MAX_MEMMAPS; i++) { 630 mm = &vm->mem_maps[i]; 631 if (mm->len != 0 && gpa >= mm->gpa && gpa < mm->gpa + mm->len) 632 return (true); /* 'gpa' is sysmem or devmem */ 633 } 634 635 if (ppt_is_mmio(vm, gpa)) 636 return (true); /* 'gpa' is pci passthru mmio */ 637 638 return (false); 639 } 640 641 int 642 vm_alloc_memseg(struct vm *vm, int ident, size_t len, bool sysmem) 643 { 644 struct mem_seg *seg; 645 vm_object_t obj; 646 647 if (ident < 0 || ident >= VM_MAX_MEMSEGS) 648 return (EINVAL); 649 650 if (len == 0 || (len & PAGE_MASK)) 651 return (EINVAL); 652 653 seg = &vm->mem_segs[ident]; 654 if (seg->object != NULL) { 655 if (seg->len == len && seg->sysmem == sysmem) 656 return (EEXIST); 657 else 658 return (EINVAL); 659 } 660 661 obj = vm_object_allocate(OBJT_DEFAULT, len >> PAGE_SHIFT); 662 if (obj == NULL) 663 return (ENOMEM); 664 665 seg->len = len; 666 seg->object = obj; 667 seg->sysmem = sysmem; 668 return (0); 669 } 670 671 int 672 vm_get_memseg(struct vm *vm, int ident, size_t *len, bool *sysmem, 673 vm_object_t *objptr) 674 { 675 struct mem_seg *seg; 676 677 if (ident < 0 || ident >= VM_MAX_MEMSEGS) 678 return (EINVAL); 679 680 seg = &vm->mem_segs[ident]; 681 if (len) 682 *len = seg->len; 683 if (sysmem) 684 *sysmem = seg->sysmem; 685 if (objptr) 686 *objptr = seg->object; 687 return (0); 688 } 689 690 void 691 vm_free_memseg(struct vm *vm, int ident) 692 { 693 struct mem_seg *seg; 694 695 KASSERT(ident >= 0 && ident < VM_MAX_MEMSEGS, 696 ("%s: invalid memseg ident %d", __func__, ident)); 697 698 seg = &vm->mem_segs[ident]; 699 if (seg->object != NULL) { 700 vm_object_deallocate(seg->object); 701 bzero(seg, sizeof(struct mem_seg)); 702 } 703 } 704 705 int 706 vm_mmap_memseg(struct vm *vm, vm_paddr_t gpa, int segid, vm_ooffset_t first, 707 size_t len, int prot, int flags) 708 { 709 struct mem_seg *seg; 710 struct mem_map *m, *map; 711 vm_ooffset_t last; 712 int i, error; 713 714 if (prot == 0 || (prot & ~(VM_PROT_ALL)) != 0) 715 return (EINVAL); 716 717 if (flags & ~VM_MEMMAP_F_WIRED) 718 return (EINVAL); 719 720 if (segid < 0 || segid >= VM_MAX_MEMSEGS) 721 return (EINVAL); 722 723 seg = &vm->mem_segs[segid]; 724 if (seg->object == NULL) 725 return (EINVAL); 726 727 last = first + len; 728 if (first < 0 || first >= last || last > seg->len) 729 return (EINVAL); 730 731 if ((gpa | first | last) & PAGE_MASK) 732 return (EINVAL); 733 734 map = NULL; 735 for (i = 0; i < VM_MAX_MEMMAPS; i++) { 736 m = &vm->mem_maps[i]; 737 if (m->len == 0) { 738 map = m; 739 break; 740 } 741 } 742 743 if (map == NULL) 744 return (ENOSPC); 745 746 error = vm_map_find(&vm->vmspace->vm_map, seg->object, first, &gpa, 747 len, 0, VMFS_NO_SPACE, prot, prot, 0); 748 if (error != KERN_SUCCESS) 749 return (EFAULT); 750 751 vm_object_reference(seg->object); 752 753 if (flags & VM_MEMMAP_F_WIRED) { 754 error = vm_map_wire(&vm->vmspace->vm_map, gpa, gpa + len, 755 VM_MAP_WIRE_USER | VM_MAP_WIRE_NOHOLES); 756 if (error != KERN_SUCCESS) { 757 vm_map_remove(&vm->vmspace->vm_map, gpa, gpa + len); 758 return (error == KERN_RESOURCE_SHORTAGE ? ENOMEM : 759 EFAULT); 760 } 761 } 762 763 map->gpa = gpa; 764 map->len = len; 765 map->segoff = first; 766 map->segid = segid; 767 map->prot = prot; 768 map->flags = flags; 769 return (0); 770 } 771 772 int 773 vm_mmap_getnext(struct vm *vm, vm_paddr_t *gpa, int *segid, 774 vm_ooffset_t *segoff, size_t *len, int *prot, int *flags) 775 { 776 struct mem_map *mm, *mmnext; 777 int i; 778 779 mmnext = NULL; 780 for (i = 0; i < VM_MAX_MEMMAPS; i++) { 781 mm = &vm->mem_maps[i]; 782 if (mm->len == 0 || mm->gpa < *gpa) 783 continue; 784 if (mmnext == NULL || mm->gpa < mmnext->gpa) 785 mmnext = mm; 786 } 787 788 if (mmnext != NULL) { 789 *gpa = mmnext->gpa; 790 if (segid) 791 *segid = mmnext->segid; 792 if (segoff) 793 *segoff = mmnext->segoff; 794 if (len) 795 *len = mmnext->len; 796 if (prot) 797 *prot = mmnext->prot; 798 if (flags) 799 *flags = mmnext->flags; 800 return (0); 801 } else { 802 return (ENOENT); 803 } 804 } 805 806 static void 807 vm_free_memmap(struct vm *vm, int ident) 808 { 809 struct mem_map *mm; 810 int error; 811 812 mm = &vm->mem_maps[ident]; 813 if (mm->len) { 814 error = vm_map_remove(&vm->vmspace->vm_map, mm->gpa, 815 mm->gpa + mm->len); 816 KASSERT(error == KERN_SUCCESS, ("%s: vm_map_remove error %d", 817 __func__, error)); 818 bzero(mm, sizeof(struct mem_map)); 819 } 820 } 821 822 static __inline bool 823 sysmem_mapping(struct vm *vm, struct mem_map *mm) 824 { 825 826 if (mm->len != 0 && vm->mem_segs[mm->segid].sysmem) 827 return (true); 828 else 829 return (false); 830 } 831 832 vm_paddr_t 833 vmm_sysmem_maxaddr(struct vm *vm) 834 { 835 struct mem_map *mm; 836 vm_paddr_t maxaddr; 837 int i; 838 839 maxaddr = 0; 840 for (i = 0; i < VM_MAX_MEMMAPS; i++) { 841 mm = &vm->mem_maps[i]; 842 if (sysmem_mapping(vm, mm)) { 843 if (maxaddr < mm->gpa + mm->len) 844 maxaddr = mm->gpa + mm->len; 845 } 846 } 847 return (maxaddr); 848 } 849 850 static void 851 vm_iommu_modify(struct vm *vm, bool map) 852 { 853 int i, sz; 854 vm_paddr_t gpa, hpa; 855 struct mem_map *mm; 856 void *vp, *cookie, *host_domain; 857 858 sz = PAGE_SIZE; 859 host_domain = iommu_host_domain(); 860 861 for (i = 0; i < VM_MAX_MEMMAPS; i++) { 862 mm = &vm->mem_maps[i]; 863 if (!sysmem_mapping(vm, mm)) 864 continue; 865 866 if (map) { 867 KASSERT((mm->flags & VM_MEMMAP_F_IOMMU) == 0, 868 ("iommu map found invalid memmap %#lx/%#lx/%#x", 869 mm->gpa, mm->len, mm->flags)); 870 if ((mm->flags & VM_MEMMAP_F_WIRED) == 0) 871 continue; 872 mm->flags |= VM_MEMMAP_F_IOMMU; 873 } else { 874 if ((mm->flags & VM_MEMMAP_F_IOMMU) == 0) 875 continue; 876 mm->flags &= ~VM_MEMMAP_F_IOMMU; 877 KASSERT((mm->flags & VM_MEMMAP_F_WIRED) != 0, 878 ("iommu unmap found invalid memmap %#lx/%#lx/%#x", 879 mm->gpa, mm->len, mm->flags)); 880 } 881 882 gpa = mm->gpa; 883 while (gpa < mm->gpa + mm->len) { 884 vp = vm_gpa_hold(vm, -1, gpa, PAGE_SIZE, VM_PROT_WRITE, 885 &cookie); 886 KASSERT(vp != NULL, ("vm(%s) could not map gpa %#lx", 887 vm_name(vm), gpa)); 888 889 vm_gpa_release(cookie); 890 891 hpa = DMAP_TO_PHYS((uintptr_t)vp); 892 if (map) { 893 iommu_create_mapping(vm->iommu, gpa, hpa, sz); 894 iommu_remove_mapping(host_domain, hpa, sz); 895 } else { 896 iommu_remove_mapping(vm->iommu, gpa, sz); 897 iommu_create_mapping(host_domain, hpa, hpa, sz); 898 } 899 900 gpa += PAGE_SIZE; 901 } 902 } 903 904 /* 905 * Invalidate the cached translations associated with the domain 906 * from which pages were removed. 907 */ 908 if (map) 909 iommu_invalidate_tlb(host_domain); 910 else 911 iommu_invalidate_tlb(vm->iommu); 912 } 913 914 #define vm_iommu_unmap(vm) vm_iommu_modify((vm), false) 915 #define vm_iommu_map(vm) vm_iommu_modify((vm), true) 916 917 int 918 vm_unassign_pptdev(struct vm *vm, int bus, int slot, int func) 919 { 920 int error; 921 922 error = ppt_unassign_device(vm, bus, slot, func); 923 if (error) 924 return (error); 925 926 if (ppt_assigned_devices(vm) == 0) 927 vm_iommu_unmap(vm); 928 929 return (0); 930 } 931 932 int 933 vm_assign_pptdev(struct vm *vm, int bus, int slot, int func) 934 { 935 int error; 936 vm_paddr_t maxaddr; 937 938 /* Set up the IOMMU to do the 'gpa' to 'hpa' translation */ 939 if (ppt_assigned_devices(vm) == 0) { 940 KASSERT(vm->iommu == NULL, 941 ("vm_assign_pptdev: iommu must be NULL")); 942 maxaddr = vmm_sysmem_maxaddr(vm); 943 vm->iommu = iommu_create_domain(maxaddr); 944 if (vm->iommu == NULL) 945 return (ENXIO); 946 vm_iommu_map(vm); 947 } 948 949 error = ppt_assign_device(vm, bus, slot, func); 950 return (error); 951 } 952 953 void * 954 vm_gpa_hold(struct vm *vm, int vcpuid, vm_paddr_t gpa, size_t len, int reqprot, 955 void **cookie) 956 { 957 int i, count, pageoff; 958 struct mem_map *mm; 959 vm_page_t m; 960 #ifdef INVARIANTS 961 /* 962 * All vcpus are frozen by ioctls that modify the memory map 963 * (e.g. VM_MMAP_MEMSEG). Therefore 'vm->memmap[]' stability is 964 * guaranteed if at least one vcpu is in the VCPU_FROZEN state. 965 */ 966 int state; 967 KASSERT(vcpuid >= -1 && vcpuid < vm->maxcpus, ("%s: invalid vcpuid %d", 968 __func__, vcpuid)); 969 for (i = 0; i < vm->maxcpus; i++) { 970 if (vcpuid != -1 && vcpuid != i) 971 continue; 972 state = vcpu_get_state(vm, i, NULL); 973 KASSERT(state == VCPU_FROZEN, ("%s: invalid vcpu state %d", 974 __func__, state)); 975 } 976 #endif 977 pageoff = gpa & PAGE_MASK; 978 if (len > PAGE_SIZE - pageoff) 979 panic("vm_gpa_hold: invalid gpa/len: 0x%016lx/%lu", gpa, len); 980 981 count = 0; 982 for (i = 0; i < VM_MAX_MEMMAPS; i++) { 983 mm = &vm->mem_maps[i]; 984 if (gpa >= mm->gpa && 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 bool 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 bool 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 #define RENDEZVOUS_CTR0(vm, vcpuid, fmt) \ 1241 do { \ 1242 if (vcpuid >= 0) \ 1243 VCPU_CTR0(vm, vcpuid, fmt); \ 1244 else \ 1245 VM_CTR0(vm, fmt); \ 1246 } while (0) 1247 1248 static int 1249 vm_handle_rendezvous(struct vm *vm, int vcpuid) 1250 { 1251 struct thread *td; 1252 int error; 1253 1254 KASSERT(vcpuid == -1 || (vcpuid >= 0 && vcpuid < vm->maxcpus), 1255 ("vm_handle_rendezvous: invalid vcpuid %d", vcpuid)); 1256 1257 error = 0; 1258 td = curthread; 1259 mtx_lock(&vm->rendezvous_mtx); 1260 while (vm->rendezvous_func != NULL) { 1261 /* 'rendezvous_req_cpus' must be a subset of 'active_cpus' */ 1262 CPU_AND(&vm->rendezvous_req_cpus, &vm->active_cpus); 1263 1264 if (vcpuid != -1 && 1265 CPU_ISSET(vcpuid, &vm->rendezvous_req_cpus) && 1266 !CPU_ISSET(vcpuid, &vm->rendezvous_done_cpus)) { 1267 VCPU_CTR0(vm, vcpuid, "Calling rendezvous func"); 1268 (*vm->rendezvous_func)(vm, vcpuid, vm->rendezvous_arg); 1269 CPU_SET(vcpuid, &vm->rendezvous_done_cpus); 1270 } 1271 if (CPU_CMP(&vm->rendezvous_req_cpus, 1272 &vm->rendezvous_done_cpus) == 0) { 1273 VCPU_CTR0(vm, vcpuid, "Rendezvous completed"); 1274 vm->rendezvous_func = NULL; 1275 wakeup(&vm->rendezvous_func); 1276 break; 1277 } 1278 RENDEZVOUS_CTR0(vm, vcpuid, "Wait for rendezvous completion"); 1279 mtx_sleep(&vm->rendezvous_func, &vm->rendezvous_mtx, 0, 1280 "vmrndv", hz); 1281 if ((td->td_flags & TDF_NEEDSUSPCHK) != 0) { 1282 mtx_unlock(&vm->rendezvous_mtx); 1283 error = thread_check_susp(td, true); 1284 if (error != 0) 1285 return (error); 1286 mtx_lock(&vm->rendezvous_mtx); 1287 } 1288 } 1289 mtx_unlock(&vm->rendezvous_mtx); 1290 return (0); 1291 } 1292 1293 /* 1294 * Emulate a guest 'hlt' by sleeping until the vcpu is ready to run. 1295 */ 1296 static int 1297 vm_handle_hlt(struct vm *vm, int vcpuid, bool intr_disabled, bool *retu) 1298 { 1299 struct vcpu *vcpu; 1300 const char *wmesg; 1301 struct thread *td; 1302 int error, t, vcpu_halted, vm_halted; 1303 1304 KASSERT(!CPU_ISSET(vcpuid, &vm->halted_cpus), ("vcpu already halted")); 1305 1306 vcpu = &vm->vcpu[vcpuid]; 1307 vcpu_halted = 0; 1308 vm_halted = 0; 1309 error = 0; 1310 td = curthread; 1311 1312 vcpu_lock(vcpu); 1313 while (1) { 1314 /* 1315 * Do a final check for pending NMI or interrupts before 1316 * really putting this thread to sleep. Also check for 1317 * software events that would cause this vcpu to wakeup. 1318 * 1319 * These interrupts/events could have happened after the 1320 * vcpu returned from VMRUN() and before it acquired the 1321 * vcpu lock above. 1322 */ 1323 if (vm->rendezvous_func != NULL || vm->suspend || vcpu->reqidle) 1324 break; 1325 if (vm_nmi_pending(vm, vcpuid)) 1326 break; 1327 if (!intr_disabled) { 1328 if (vm_extint_pending(vm, vcpuid) || 1329 vlapic_pending_intr(vcpu->vlapic, NULL)) { 1330 break; 1331 } 1332 } 1333 1334 /* Don't go to sleep if the vcpu thread needs to yield */ 1335 if (vcpu_should_yield(vm, vcpuid)) 1336 break; 1337 1338 if (vcpu_debugged(vm, vcpuid)) 1339 break; 1340 1341 /* 1342 * Some Linux guests implement "halt" by having all vcpus 1343 * execute HLT with interrupts disabled. 'halted_cpus' keeps 1344 * track of the vcpus that have entered this state. When all 1345 * vcpus enter the halted state the virtual machine is halted. 1346 */ 1347 if (intr_disabled) { 1348 wmesg = "vmhalt"; 1349 VCPU_CTR0(vm, vcpuid, "Halted"); 1350 if (!vcpu_halted && halt_detection_enabled) { 1351 vcpu_halted = 1; 1352 CPU_SET_ATOMIC(vcpuid, &vm->halted_cpus); 1353 } 1354 if (CPU_CMP(&vm->halted_cpus, &vm->active_cpus) == 0) { 1355 vm_halted = 1; 1356 break; 1357 } 1358 } else { 1359 wmesg = "vmidle"; 1360 } 1361 1362 t = ticks; 1363 vcpu_require_state_locked(vm, vcpuid, VCPU_SLEEPING); 1364 /* 1365 * XXX msleep_spin() cannot be interrupted by signals so 1366 * wake up periodically to check pending signals. 1367 */ 1368 msleep_spin(vcpu, &vcpu->mtx, wmesg, hz); 1369 vcpu_require_state_locked(vm, vcpuid, VCPU_FROZEN); 1370 vmm_stat_incr(vm, vcpuid, VCPU_IDLE_TICKS, ticks - t); 1371 if ((td->td_flags & TDF_NEEDSUSPCHK) != 0) { 1372 vcpu_unlock(vcpu); 1373 error = thread_check_susp(td, false); 1374 if (error != 0) 1375 return (error); 1376 vcpu_lock(vcpu); 1377 } 1378 } 1379 1380 if (vcpu_halted) 1381 CPU_CLR_ATOMIC(vcpuid, &vm->halted_cpus); 1382 1383 vcpu_unlock(vcpu); 1384 1385 if (vm_halted) 1386 vm_suspend(vm, VM_SUSPEND_HALT); 1387 1388 return (0); 1389 } 1390 1391 static int 1392 vm_handle_paging(struct vm *vm, int vcpuid, bool *retu) 1393 { 1394 int rv, ftype; 1395 struct vm_map *map; 1396 struct vcpu *vcpu; 1397 struct vm_exit *vme; 1398 1399 vcpu = &vm->vcpu[vcpuid]; 1400 vme = &vcpu->exitinfo; 1401 1402 KASSERT(vme->inst_length == 0, ("%s: invalid inst_length %d", 1403 __func__, vme->inst_length)); 1404 1405 ftype = vme->u.paging.fault_type; 1406 KASSERT(ftype == VM_PROT_READ || 1407 ftype == VM_PROT_WRITE || ftype == VM_PROT_EXECUTE, 1408 ("vm_handle_paging: invalid fault_type %d", ftype)); 1409 1410 if (ftype == VM_PROT_READ || ftype == VM_PROT_WRITE) { 1411 rv = pmap_emulate_accessed_dirty(vmspace_pmap(vm->vmspace), 1412 vme->u.paging.gpa, ftype); 1413 if (rv == 0) { 1414 VCPU_CTR2(vm, vcpuid, "%s bit emulation for gpa %#lx", 1415 ftype == VM_PROT_READ ? "accessed" : "dirty", 1416 vme->u.paging.gpa); 1417 goto done; 1418 } 1419 } 1420 1421 map = &vm->vmspace->vm_map; 1422 rv = vm_fault(map, vme->u.paging.gpa, ftype, VM_FAULT_NORMAL, NULL); 1423 1424 VCPU_CTR3(vm, vcpuid, "vm_handle_paging rv = %d, gpa = %#lx, " 1425 "ftype = %d", rv, vme->u.paging.gpa, ftype); 1426 1427 if (rv != KERN_SUCCESS) 1428 return (EFAULT); 1429 done: 1430 return (0); 1431 } 1432 1433 static int 1434 vm_handle_inst_emul(struct vm *vm, int vcpuid, bool *retu) 1435 { 1436 struct vie *vie; 1437 struct vcpu *vcpu; 1438 struct vm_exit *vme; 1439 uint64_t gla, gpa, cs_base; 1440 struct vm_guest_paging *paging; 1441 mem_region_read_t mread; 1442 mem_region_write_t mwrite; 1443 enum vm_cpu_mode cpu_mode; 1444 int cs_d, error, fault; 1445 1446 vcpu = &vm->vcpu[vcpuid]; 1447 vme = &vcpu->exitinfo; 1448 1449 KASSERT(vme->inst_length == 0, ("%s: invalid inst_length %d", 1450 __func__, vme->inst_length)); 1451 1452 gla = vme->u.inst_emul.gla; 1453 gpa = vme->u.inst_emul.gpa; 1454 cs_base = vme->u.inst_emul.cs_base; 1455 cs_d = vme->u.inst_emul.cs_d; 1456 vie = &vme->u.inst_emul.vie; 1457 paging = &vme->u.inst_emul.paging; 1458 cpu_mode = paging->cpu_mode; 1459 1460 VCPU_CTR1(vm, vcpuid, "inst_emul fault accessing gpa %#lx", gpa); 1461 1462 /* Fetch, decode and emulate the faulting instruction */ 1463 if (vie->num_valid == 0) { 1464 error = vmm_fetch_instruction(vm, vcpuid, paging, vme->rip + 1465 cs_base, VIE_INST_SIZE, vie, &fault); 1466 } else { 1467 /* 1468 * The instruction bytes have already been copied into 'vie' 1469 */ 1470 error = fault = 0; 1471 } 1472 if (error || fault) 1473 return (error); 1474 1475 if (vmm_decode_instruction(vm, vcpuid, gla, cpu_mode, cs_d, vie) != 0) { 1476 VCPU_CTR1(vm, vcpuid, "Error decoding instruction at %#lx", 1477 vme->rip + cs_base); 1478 *retu = true; /* dump instruction bytes in userspace */ 1479 return (0); 1480 } 1481 1482 /* 1483 * Update 'nextrip' based on the length of the emulated instruction. 1484 */ 1485 vme->inst_length = vie->num_processed; 1486 vcpu->nextrip += vie->num_processed; 1487 VCPU_CTR1(vm, vcpuid, "nextrip updated to %#lx after instruction " 1488 "decoding", vcpu->nextrip); 1489 1490 /* return to userland unless this is an in-kernel emulated device */ 1491 if (gpa >= DEFAULT_APIC_BASE && gpa < DEFAULT_APIC_BASE + PAGE_SIZE) { 1492 mread = lapic_mmio_read; 1493 mwrite = lapic_mmio_write; 1494 } else if (gpa >= VIOAPIC_BASE && gpa < VIOAPIC_BASE + VIOAPIC_SIZE) { 1495 mread = vioapic_mmio_read; 1496 mwrite = vioapic_mmio_write; 1497 } else if (gpa >= VHPET_BASE && gpa < VHPET_BASE + VHPET_SIZE) { 1498 mread = vhpet_mmio_read; 1499 mwrite = vhpet_mmio_write; 1500 } else { 1501 *retu = true; 1502 return (0); 1503 } 1504 1505 error = vmm_emulate_instruction(vm, vcpuid, gpa, vie, paging, 1506 mread, mwrite, retu); 1507 1508 return (error); 1509 } 1510 1511 static int 1512 vm_handle_suspend(struct vm *vm, int vcpuid, bool *retu) 1513 { 1514 int error, i; 1515 struct vcpu *vcpu; 1516 struct thread *td; 1517 1518 error = 0; 1519 vcpu = &vm->vcpu[vcpuid]; 1520 td = curthread; 1521 1522 CPU_SET_ATOMIC(vcpuid, &vm->suspended_cpus); 1523 1524 /* 1525 * Wait until all 'active_cpus' have suspended themselves. 1526 * 1527 * Since a VM may be suspended at any time including when one or 1528 * more vcpus are doing a rendezvous we need to call the rendezvous 1529 * handler while we are waiting to prevent a deadlock. 1530 */ 1531 vcpu_lock(vcpu); 1532 while (error == 0) { 1533 if (CPU_CMP(&vm->suspended_cpus, &vm->active_cpus) == 0) { 1534 VCPU_CTR0(vm, vcpuid, "All vcpus suspended"); 1535 break; 1536 } 1537 1538 if (vm->rendezvous_func == NULL) { 1539 VCPU_CTR0(vm, vcpuid, "Sleeping during suspend"); 1540 vcpu_require_state_locked(vm, vcpuid, VCPU_SLEEPING); 1541 msleep_spin(vcpu, &vcpu->mtx, "vmsusp", hz); 1542 vcpu_require_state_locked(vm, vcpuid, VCPU_FROZEN); 1543 if ((td->td_flags & TDF_NEEDSUSPCHK) != 0) { 1544 vcpu_unlock(vcpu); 1545 error = thread_check_susp(td, false); 1546 vcpu_lock(vcpu); 1547 } 1548 } else { 1549 VCPU_CTR0(vm, vcpuid, "Rendezvous during suspend"); 1550 vcpu_unlock(vcpu); 1551 error = vm_handle_rendezvous(vm, vcpuid); 1552 vcpu_lock(vcpu); 1553 } 1554 } 1555 vcpu_unlock(vcpu); 1556 1557 /* 1558 * Wakeup the other sleeping vcpus and return to userspace. 1559 */ 1560 for (i = 0; i < vm->maxcpus; i++) { 1561 if (CPU_ISSET(i, &vm->suspended_cpus)) { 1562 vcpu_notify_event(vm, i, false); 1563 } 1564 } 1565 1566 *retu = true; 1567 return (error); 1568 } 1569 1570 static int 1571 vm_handle_reqidle(struct vm *vm, int vcpuid, bool *retu) 1572 { 1573 struct vcpu *vcpu = &vm->vcpu[vcpuid]; 1574 1575 vcpu_lock(vcpu); 1576 KASSERT(vcpu->reqidle, ("invalid vcpu reqidle %d", vcpu->reqidle)); 1577 vcpu->reqidle = 0; 1578 vcpu_unlock(vcpu); 1579 *retu = true; 1580 return (0); 1581 } 1582 1583 int 1584 vm_suspend(struct vm *vm, enum vm_suspend_how how) 1585 { 1586 int i; 1587 1588 if (how <= VM_SUSPEND_NONE || how >= VM_SUSPEND_LAST) 1589 return (EINVAL); 1590 1591 if (atomic_cmpset_int(&vm->suspend, 0, how) == 0) { 1592 VM_CTR2(vm, "virtual machine already suspended %d/%d", 1593 vm->suspend, how); 1594 return (EALREADY); 1595 } 1596 1597 VM_CTR1(vm, "virtual machine successfully suspended %d", how); 1598 1599 /* 1600 * Notify all active vcpus that they are now suspended. 1601 */ 1602 for (i = 0; i < vm->maxcpus; i++) { 1603 if (CPU_ISSET(i, &vm->active_cpus)) 1604 vcpu_notify_event(vm, i, false); 1605 } 1606 1607 return (0); 1608 } 1609 1610 void 1611 vm_exit_suspended(struct vm *vm, int vcpuid, uint64_t rip) 1612 { 1613 struct vm_exit *vmexit; 1614 1615 KASSERT(vm->suspend > VM_SUSPEND_NONE && vm->suspend < VM_SUSPEND_LAST, 1616 ("vm_exit_suspended: invalid suspend type %d", vm->suspend)); 1617 1618 vmexit = vm_exitinfo(vm, vcpuid); 1619 vmexit->rip = rip; 1620 vmexit->inst_length = 0; 1621 vmexit->exitcode = VM_EXITCODE_SUSPENDED; 1622 vmexit->u.suspended.how = vm->suspend; 1623 } 1624 1625 void 1626 vm_exit_debug(struct vm *vm, int vcpuid, uint64_t rip) 1627 { 1628 struct vm_exit *vmexit; 1629 1630 vmexit = vm_exitinfo(vm, vcpuid); 1631 vmexit->rip = rip; 1632 vmexit->inst_length = 0; 1633 vmexit->exitcode = VM_EXITCODE_DEBUG; 1634 } 1635 1636 void 1637 vm_exit_rendezvous(struct vm *vm, int vcpuid, uint64_t rip) 1638 { 1639 struct vm_exit *vmexit; 1640 1641 KASSERT(vm->rendezvous_func != NULL, ("rendezvous not in progress")); 1642 1643 vmexit = vm_exitinfo(vm, vcpuid); 1644 vmexit->rip = rip; 1645 vmexit->inst_length = 0; 1646 vmexit->exitcode = VM_EXITCODE_RENDEZVOUS; 1647 vmm_stat_incr(vm, vcpuid, VMEXIT_RENDEZVOUS, 1); 1648 } 1649 1650 void 1651 vm_exit_reqidle(struct vm *vm, int vcpuid, uint64_t rip) 1652 { 1653 struct vm_exit *vmexit; 1654 1655 vmexit = vm_exitinfo(vm, vcpuid); 1656 vmexit->rip = rip; 1657 vmexit->inst_length = 0; 1658 vmexit->exitcode = VM_EXITCODE_REQIDLE; 1659 vmm_stat_incr(vm, vcpuid, VMEXIT_REQIDLE, 1); 1660 } 1661 1662 void 1663 vm_exit_astpending(struct vm *vm, int vcpuid, uint64_t rip) 1664 { 1665 struct vm_exit *vmexit; 1666 1667 vmexit = vm_exitinfo(vm, vcpuid); 1668 vmexit->rip = rip; 1669 vmexit->inst_length = 0; 1670 vmexit->exitcode = VM_EXITCODE_BOGUS; 1671 vmm_stat_incr(vm, vcpuid, VMEXIT_ASTPENDING, 1); 1672 } 1673 1674 int 1675 vm_run(struct vm *vm, struct vm_run *vmrun) 1676 { 1677 struct vm_eventinfo evinfo; 1678 int error, vcpuid; 1679 struct vcpu *vcpu; 1680 struct pcb *pcb; 1681 uint64_t tscval; 1682 struct vm_exit *vme; 1683 bool retu, intr_disabled; 1684 pmap_t pmap; 1685 1686 vcpuid = vmrun->cpuid; 1687 1688 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 1689 return (EINVAL); 1690 1691 if (!CPU_ISSET(vcpuid, &vm->active_cpus)) 1692 return (EINVAL); 1693 1694 if (CPU_ISSET(vcpuid, &vm->suspended_cpus)) 1695 return (EINVAL); 1696 1697 pmap = vmspace_pmap(vm->vmspace); 1698 vcpu = &vm->vcpu[vcpuid]; 1699 vme = &vcpu->exitinfo; 1700 evinfo.rptr = &vm->rendezvous_func; 1701 evinfo.sptr = &vm->suspend; 1702 evinfo.iptr = &vcpu->reqidle; 1703 restart: 1704 critical_enter(); 1705 1706 KASSERT(!CPU_ISSET(curcpu, &pmap->pm_active), 1707 ("vm_run: absurd pm_active")); 1708 1709 tscval = rdtsc(); 1710 1711 pcb = PCPU_GET(curpcb); 1712 set_pcb_flags(pcb, PCB_FULL_IRET); 1713 1714 restore_guest_fpustate(vcpu); 1715 1716 vcpu_require_state(vm, vcpuid, VCPU_RUNNING); 1717 error = VMRUN(vm->cookie, vcpuid, vcpu->nextrip, pmap, &evinfo); 1718 vcpu_require_state(vm, vcpuid, VCPU_FROZEN); 1719 1720 save_guest_fpustate(vcpu); 1721 1722 vmm_stat_incr(vm, vcpuid, VCPU_TOTAL_RUNTIME, rdtsc() - tscval); 1723 1724 critical_exit(); 1725 1726 if (error == 0) { 1727 retu = false; 1728 vcpu->nextrip = vme->rip + vme->inst_length; 1729 switch (vme->exitcode) { 1730 case VM_EXITCODE_REQIDLE: 1731 error = vm_handle_reqidle(vm, vcpuid, &retu); 1732 break; 1733 case VM_EXITCODE_SUSPENDED: 1734 error = vm_handle_suspend(vm, vcpuid, &retu); 1735 break; 1736 case VM_EXITCODE_IOAPIC_EOI: 1737 vioapic_process_eoi(vm, vcpuid, 1738 vme->u.ioapic_eoi.vector); 1739 break; 1740 case VM_EXITCODE_RENDEZVOUS: 1741 error = vm_handle_rendezvous(vm, vcpuid); 1742 break; 1743 case VM_EXITCODE_HLT: 1744 intr_disabled = ((vme->u.hlt.rflags & PSL_I) == 0); 1745 error = vm_handle_hlt(vm, vcpuid, intr_disabled, &retu); 1746 break; 1747 case VM_EXITCODE_PAGING: 1748 error = vm_handle_paging(vm, vcpuid, &retu); 1749 break; 1750 case VM_EXITCODE_INST_EMUL: 1751 error = vm_handle_inst_emul(vm, vcpuid, &retu); 1752 break; 1753 case VM_EXITCODE_INOUT: 1754 case VM_EXITCODE_INOUT_STR: 1755 error = vm_handle_inout(vm, vcpuid, vme, &retu); 1756 break; 1757 case VM_EXITCODE_MONITOR: 1758 case VM_EXITCODE_MWAIT: 1759 case VM_EXITCODE_VMINSN: 1760 vm_inject_ud(vm, vcpuid); 1761 break; 1762 default: 1763 retu = true; /* handled in userland */ 1764 break; 1765 } 1766 } 1767 1768 if (error == 0 && retu == false) 1769 goto restart; 1770 1771 VCPU_CTR2(vm, vcpuid, "retu %d/%d", error, vme->exitcode); 1772 1773 /* copy the exit information */ 1774 bcopy(vme, &vmrun->vm_exit, sizeof(struct vm_exit)); 1775 return (error); 1776 } 1777 1778 int 1779 vm_restart_instruction(void *arg, int vcpuid) 1780 { 1781 struct vm *vm; 1782 struct vcpu *vcpu; 1783 enum vcpu_state state; 1784 uint64_t rip; 1785 int error; 1786 1787 vm = arg; 1788 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 1789 return (EINVAL); 1790 1791 vcpu = &vm->vcpu[vcpuid]; 1792 state = vcpu_get_state(vm, vcpuid, NULL); 1793 if (state == VCPU_RUNNING) { 1794 /* 1795 * When a vcpu is "running" the next instruction is determined 1796 * by adding 'rip' and 'inst_length' in the vcpu's 'exitinfo'. 1797 * Thus setting 'inst_length' to zero will cause the current 1798 * instruction to be restarted. 1799 */ 1800 vcpu->exitinfo.inst_length = 0; 1801 VCPU_CTR1(vm, vcpuid, "restarting instruction at %#lx by " 1802 "setting inst_length to zero", vcpu->exitinfo.rip); 1803 } else if (state == VCPU_FROZEN) { 1804 /* 1805 * When a vcpu is "frozen" it is outside the critical section 1806 * around VMRUN() and 'nextrip' points to the next instruction. 1807 * Thus instruction restart is achieved by setting 'nextrip' 1808 * to the vcpu's %rip. 1809 */ 1810 error = vm_get_register(vm, vcpuid, VM_REG_GUEST_RIP, &rip); 1811 KASSERT(!error, ("%s: error %d getting rip", __func__, error)); 1812 VCPU_CTR2(vm, vcpuid, "restarting instruction by updating " 1813 "nextrip from %#lx to %#lx", vcpu->nextrip, rip); 1814 vcpu->nextrip = rip; 1815 } else { 1816 panic("%s: invalid state %d", __func__, state); 1817 } 1818 return (0); 1819 } 1820 1821 int 1822 vm_exit_intinfo(struct vm *vm, int vcpuid, uint64_t info) 1823 { 1824 struct vcpu *vcpu; 1825 int type, vector; 1826 1827 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 1828 return (EINVAL); 1829 1830 vcpu = &vm->vcpu[vcpuid]; 1831 1832 if (info & VM_INTINFO_VALID) { 1833 type = info & VM_INTINFO_TYPE; 1834 vector = info & 0xff; 1835 if (type == VM_INTINFO_NMI && vector != IDT_NMI) 1836 return (EINVAL); 1837 if (type == VM_INTINFO_HWEXCEPTION && vector >= 32) 1838 return (EINVAL); 1839 if (info & VM_INTINFO_RSVD) 1840 return (EINVAL); 1841 } else { 1842 info = 0; 1843 } 1844 VCPU_CTR2(vm, vcpuid, "%s: info1(%#lx)", __func__, info); 1845 vcpu->exitintinfo = info; 1846 return (0); 1847 } 1848 1849 enum exc_class { 1850 EXC_BENIGN, 1851 EXC_CONTRIBUTORY, 1852 EXC_PAGEFAULT 1853 }; 1854 1855 #define IDT_VE 20 /* Virtualization Exception (Intel specific) */ 1856 1857 static enum exc_class 1858 exception_class(uint64_t info) 1859 { 1860 int type, vector; 1861 1862 KASSERT(info & VM_INTINFO_VALID, ("intinfo must be valid: %#lx", info)); 1863 type = info & VM_INTINFO_TYPE; 1864 vector = info & 0xff; 1865 1866 /* Table 6-4, "Interrupt and Exception Classes", Intel SDM, Vol 3 */ 1867 switch (type) { 1868 case VM_INTINFO_HWINTR: 1869 case VM_INTINFO_SWINTR: 1870 case VM_INTINFO_NMI: 1871 return (EXC_BENIGN); 1872 default: 1873 /* 1874 * Hardware exception. 1875 * 1876 * SVM and VT-x use identical type values to represent NMI, 1877 * hardware interrupt and software interrupt. 1878 * 1879 * SVM uses type '3' for all exceptions. VT-x uses type '3' 1880 * for exceptions except #BP and #OF. #BP and #OF use a type 1881 * value of '5' or '6'. Therefore we don't check for explicit 1882 * values of 'type' to classify 'intinfo' into a hardware 1883 * exception. 1884 */ 1885 break; 1886 } 1887 1888 switch (vector) { 1889 case IDT_PF: 1890 case IDT_VE: 1891 return (EXC_PAGEFAULT); 1892 case IDT_DE: 1893 case IDT_TS: 1894 case IDT_NP: 1895 case IDT_SS: 1896 case IDT_GP: 1897 return (EXC_CONTRIBUTORY); 1898 default: 1899 return (EXC_BENIGN); 1900 } 1901 } 1902 1903 static int 1904 nested_fault(struct vm *vm, int vcpuid, uint64_t info1, uint64_t info2, 1905 uint64_t *retinfo) 1906 { 1907 enum exc_class exc1, exc2; 1908 int type1, vector1; 1909 1910 KASSERT(info1 & VM_INTINFO_VALID, ("info1 %#lx is not valid", info1)); 1911 KASSERT(info2 & VM_INTINFO_VALID, ("info2 %#lx is not valid", info2)); 1912 1913 /* 1914 * If an exception occurs while attempting to call the double-fault 1915 * handler the processor enters shutdown mode (aka triple fault). 1916 */ 1917 type1 = info1 & VM_INTINFO_TYPE; 1918 vector1 = info1 & 0xff; 1919 if (type1 == VM_INTINFO_HWEXCEPTION && vector1 == IDT_DF) { 1920 VCPU_CTR2(vm, vcpuid, "triple fault: info1(%#lx), info2(%#lx)", 1921 info1, info2); 1922 vm_suspend(vm, VM_SUSPEND_TRIPLEFAULT); 1923 *retinfo = 0; 1924 return (0); 1925 } 1926 1927 /* 1928 * Table 6-5 "Conditions for Generating a Double Fault", Intel SDM, Vol3 1929 */ 1930 exc1 = exception_class(info1); 1931 exc2 = exception_class(info2); 1932 if ((exc1 == EXC_CONTRIBUTORY && exc2 == EXC_CONTRIBUTORY) || 1933 (exc1 == EXC_PAGEFAULT && exc2 != EXC_BENIGN)) { 1934 /* Convert nested fault into a double fault. */ 1935 *retinfo = IDT_DF; 1936 *retinfo |= VM_INTINFO_VALID | VM_INTINFO_HWEXCEPTION; 1937 *retinfo |= VM_INTINFO_DEL_ERRCODE; 1938 } else { 1939 /* Handle exceptions serially */ 1940 *retinfo = info2; 1941 } 1942 return (1); 1943 } 1944 1945 static uint64_t 1946 vcpu_exception_intinfo(struct vcpu *vcpu) 1947 { 1948 uint64_t info = 0; 1949 1950 if (vcpu->exception_pending) { 1951 info = vcpu->exc_vector & 0xff; 1952 info |= VM_INTINFO_VALID | VM_INTINFO_HWEXCEPTION; 1953 if (vcpu->exc_errcode_valid) { 1954 info |= VM_INTINFO_DEL_ERRCODE; 1955 info |= (uint64_t)vcpu->exc_errcode << 32; 1956 } 1957 } 1958 return (info); 1959 } 1960 1961 int 1962 vm_entry_intinfo(struct vm *vm, int vcpuid, uint64_t *retinfo) 1963 { 1964 struct vcpu *vcpu; 1965 uint64_t info1, info2; 1966 int valid; 1967 1968 KASSERT(vcpuid >= 0 && 1969 vcpuid < vm->maxcpus, ("invalid vcpu %d", vcpuid)); 1970 1971 vcpu = &vm->vcpu[vcpuid]; 1972 1973 info1 = vcpu->exitintinfo; 1974 vcpu->exitintinfo = 0; 1975 1976 info2 = 0; 1977 if (vcpu->exception_pending) { 1978 info2 = vcpu_exception_intinfo(vcpu); 1979 vcpu->exception_pending = 0; 1980 VCPU_CTR2(vm, vcpuid, "Exception %d delivered: %#lx", 1981 vcpu->exc_vector, info2); 1982 } 1983 1984 if ((info1 & VM_INTINFO_VALID) && (info2 & VM_INTINFO_VALID)) { 1985 valid = nested_fault(vm, vcpuid, info1, info2, retinfo); 1986 } else if (info1 & VM_INTINFO_VALID) { 1987 *retinfo = info1; 1988 valid = 1; 1989 } else if (info2 & VM_INTINFO_VALID) { 1990 *retinfo = info2; 1991 valid = 1; 1992 } else { 1993 valid = 0; 1994 } 1995 1996 if (valid) { 1997 VCPU_CTR4(vm, vcpuid, "%s: info1(%#lx), info2(%#lx), " 1998 "retinfo(%#lx)", __func__, info1, info2, *retinfo); 1999 } 2000 2001 return (valid); 2002 } 2003 2004 int 2005 vm_get_intinfo(struct vm *vm, int vcpuid, uint64_t *info1, uint64_t *info2) 2006 { 2007 struct vcpu *vcpu; 2008 2009 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2010 return (EINVAL); 2011 2012 vcpu = &vm->vcpu[vcpuid]; 2013 *info1 = vcpu->exitintinfo; 2014 *info2 = vcpu_exception_intinfo(vcpu); 2015 return (0); 2016 } 2017 2018 int 2019 vm_inject_exception(struct vm *vm, int vcpuid, int vector, int errcode_valid, 2020 uint32_t errcode, int restart_instruction) 2021 { 2022 struct vcpu *vcpu; 2023 uint64_t regval; 2024 int error; 2025 2026 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2027 return (EINVAL); 2028 2029 if (vector < 0 || vector >= 32) 2030 return (EINVAL); 2031 2032 /* 2033 * A double fault exception should never be injected directly into 2034 * the guest. It is a derived exception that results from specific 2035 * combinations of nested faults. 2036 */ 2037 if (vector == IDT_DF) 2038 return (EINVAL); 2039 2040 vcpu = &vm->vcpu[vcpuid]; 2041 2042 if (vcpu->exception_pending) { 2043 VCPU_CTR2(vm, vcpuid, "Unable to inject exception %d due to " 2044 "pending exception %d", vector, vcpu->exc_vector); 2045 return (EBUSY); 2046 } 2047 2048 if (errcode_valid) { 2049 /* 2050 * Exceptions don't deliver an error code in real mode. 2051 */ 2052 error = vm_get_register(vm, vcpuid, VM_REG_GUEST_CR0, ®val); 2053 KASSERT(!error, ("%s: error %d getting CR0", __func__, error)); 2054 if (!(regval & CR0_PE)) 2055 errcode_valid = 0; 2056 } 2057 2058 /* 2059 * From section 26.6.1 "Interruptibility State" in Intel SDM: 2060 * 2061 * Event blocking by "STI" or "MOV SS" is cleared after guest executes 2062 * one instruction or incurs an exception. 2063 */ 2064 error = vm_set_register(vm, vcpuid, VM_REG_GUEST_INTR_SHADOW, 0); 2065 KASSERT(error == 0, ("%s: error %d clearing interrupt shadow", 2066 __func__, error)); 2067 2068 if (restart_instruction) 2069 vm_restart_instruction(vm, vcpuid); 2070 2071 vcpu->exception_pending = 1; 2072 vcpu->exc_vector = vector; 2073 vcpu->exc_errcode = errcode; 2074 vcpu->exc_errcode_valid = errcode_valid; 2075 VCPU_CTR1(vm, vcpuid, "Exception %d pending", vector); 2076 return (0); 2077 } 2078 2079 void 2080 vm_inject_fault(void *vmarg, int vcpuid, int vector, int errcode_valid, 2081 int errcode) 2082 { 2083 struct vm *vm; 2084 int error, restart_instruction; 2085 2086 vm = vmarg; 2087 restart_instruction = 1; 2088 2089 error = vm_inject_exception(vm, vcpuid, vector, errcode_valid, 2090 errcode, restart_instruction); 2091 KASSERT(error == 0, ("vm_inject_exception error %d", error)); 2092 } 2093 2094 void 2095 vm_inject_pf(void *vmarg, int vcpuid, int error_code, uint64_t cr2) 2096 { 2097 struct vm *vm; 2098 int error; 2099 2100 vm = vmarg; 2101 VCPU_CTR2(vm, vcpuid, "Injecting page fault: error_code %#x, cr2 %#lx", 2102 error_code, cr2); 2103 2104 error = vm_set_register(vm, vcpuid, VM_REG_GUEST_CR2, cr2); 2105 KASSERT(error == 0, ("vm_set_register(cr2) error %d", error)); 2106 2107 vm_inject_fault(vm, vcpuid, IDT_PF, 1, error_code); 2108 } 2109 2110 static VMM_STAT(VCPU_NMI_COUNT, "number of NMIs delivered to vcpu"); 2111 2112 int 2113 vm_inject_nmi(struct vm *vm, int vcpuid) 2114 { 2115 struct vcpu *vcpu; 2116 2117 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2118 return (EINVAL); 2119 2120 vcpu = &vm->vcpu[vcpuid]; 2121 2122 vcpu->nmi_pending = 1; 2123 vcpu_notify_event(vm, vcpuid, false); 2124 return (0); 2125 } 2126 2127 int 2128 vm_nmi_pending(struct vm *vm, int vcpuid) 2129 { 2130 struct vcpu *vcpu; 2131 2132 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2133 panic("vm_nmi_pending: invalid vcpuid %d", vcpuid); 2134 2135 vcpu = &vm->vcpu[vcpuid]; 2136 2137 return (vcpu->nmi_pending); 2138 } 2139 2140 void 2141 vm_nmi_clear(struct vm *vm, int vcpuid) 2142 { 2143 struct vcpu *vcpu; 2144 2145 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2146 panic("vm_nmi_pending: invalid vcpuid %d", vcpuid); 2147 2148 vcpu = &vm->vcpu[vcpuid]; 2149 2150 if (vcpu->nmi_pending == 0) 2151 panic("vm_nmi_clear: inconsistent nmi_pending state"); 2152 2153 vcpu->nmi_pending = 0; 2154 vmm_stat_incr(vm, vcpuid, VCPU_NMI_COUNT, 1); 2155 } 2156 2157 static VMM_STAT(VCPU_EXTINT_COUNT, "number of ExtINTs delivered to vcpu"); 2158 2159 int 2160 vm_inject_extint(struct vm *vm, int vcpuid) 2161 { 2162 struct vcpu *vcpu; 2163 2164 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2165 return (EINVAL); 2166 2167 vcpu = &vm->vcpu[vcpuid]; 2168 2169 vcpu->extint_pending = 1; 2170 vcpu_notify_event(vm, vcpuid, false); 2171 return (0); 2172 } 2173 2174 int 2175 vm_extint_pending(struct vm *vm, int vcpuid) 2176 { 2177 struct vcpu *vcpu; 2178 2179 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2180 panic("vm_extint_pending: invalid vcpuid %d", vcpuid); 2181 2182 vcpu = &vm->vcpu[vcpuid]; 2183 2184 return (vcpu->extint_pending); 2185 } 2186 2187 void 2188 vm_extint_clear(struct vm *vm, int vcpuid) 2189 { 2190 struct vcpu *vcpu; 2191 2192 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2193 panic("vm_extint_pending: invalid vcpuid %d", vcpuid); 2194 2195 vcpu = &vm->vcpu[vcpuid]; 2196 2197 if (vcpu->extint_pending == 0) 2198 panic("vm_extint_clear: inconsistent extint_pending state"); 2199 2200 vcpu->extint_pending = 0; 2201 vmm_stat_incr(vm, vcpuid, VCPU_EXTINT_COUNT, 1); 2202 } 2203 2204 int 2205 vm_get_capability(struct vm *vm, int vcpu, int type, int *retval) 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 (VMGETCAP(vm->cookie, vcpu, type, retval)); 2214 } 2215 2216 int 2217 vm_set_capability(struct vm *vm, int vcpu, int type, int val) 2218 { 2219 if (vcpu < 0 || vcpu >= vm->maxcpus) 2220 return (EINVAL); 2221 2222 if (type < 0 || type >= VM_CAP_MAX) 2223 return (EINVAL); 2224 2225 return (VMSETCAP(vm->cookie, vcpu, type, val)); 2226 } 2227 2228 struct vlapic * 2229 vm_lapic(struct vm *vm, int cpu) 2230 { 2231 return (vm->vcpu[cpu].vlapic); 2232 } 2233 2234 struct vioapic * 2235 vm_ioapic(struct vm *vm) 2236 { 2237 2238 return (vm->vioapic); 2239 } 2240 2241 struct vhpet * 2242 vm_hpet(struct vm *vm) 2243 { 2244 2245 return (vm->vhpet); 2246 } 2247 2248 bool 2249 vmm_is_pptdev(int bus, int slot, int func) 2250 { 2251 int b, f, i, n, s; 2252 char *val, *cp, *cp2; 2253 bool found; 2254 2255 /* 2256 * XXX 2257 * The length of an environment variable is limited to 128 bytes which 2258 * puts an upper limit on the number of passthru devices that may be 2259 * specified using a single environment variable. 2260 * 2261 * Work around this by scanning multiple environment variable 2262 * names instead of a single one - yuck! 2263 */ 2264 const char *names[] = { "pptdevs", "pptdevs2", "pptdevs3", NULL }; 2265 2266 /* set pptdevs="1/2/3 4/5/6 7/8/9 10/11/12" */ 2267 found = false; 2268 for (i = 0; names[i] != NULL && !found; i++) { 2269 cp = val = kern_getenv(names[i]); 2270 while (cp != NULL && *cp != '\0') { 2271 if ((cp2 = strchr(cp, ' ')) != NULL) 2272 *cp2 = '\0'; 2273 2274 n = sscanf(cp, "%d/%d/%d", &b, &s, &f); 2275 if (n == 3 && bus == b && slot == s && func == f) { 2276 found = true; 2277 break; 2278 } 2279 2280 if (cp2 != NULL) 2281 *cp2++ = ' '; 2282 2283 cp = cp2; 2284 } 2285 freeenv(val); 2286 } 2287 return (found); 2288 } 2289 2290 void * 2291 vm_iommu_domain(struct vm *vm) 2292 { 2293 2294 return (vm->iommu); 2295 } 2296 2297 int 2298 vcpu_set_state(struct vm *vm, int vcpuid, enum vcpu_state newstate, 2299 bool from_idle) 2300 { 2301 int error; 2302 struct vcpu *vcpu; 2303 2304 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2305 panic("vm_set_run_state: invalid vcpuid %d", vcpuid); 2306 2307 vcpu = &vm->vcpu[vcpuid]; 2308 2309 vcpu_lock(vcpu); 2310 error = vcpu_set_state_locked(vm, vcpuid, newstate, from_idle); 2311 vcpu_unlock(vcpu); 2312 2313 return (error); 2314 } 2315 2316 enum vcpu_state 2317 vcpu_get_state(struct vm *vm, int vcpuid, int *hostcpu) 2318 { 2319 struct vcpu *vcpu; 2320 enum vcpu_state state; 2321 2322 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2323 panic("vm_get_run_state: invalid vcpuid %d", vcpuid); 2324 2325 vcpu = &vm->vcpu[vcpuid]; 2326 2327 vcpu_lock(vcpu); 2328 state = vcpu->state; 2329 if (hostcpu != NULL) 2330 *hostcpu = vcpu->hostcpu; 2331 vcpu_unlock(vcpu); 2332 2333 return (state); 2334 } 2335 2336 int 2337 vm_activate_cpu(struct vm *vm, int vcpuid) 2338 { 2339 2340 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2341 return (EINVAL); 2342 2343 if (CPU_ISSET(vcpuid, &vm->active_cpus)) 2344 return (EBUSY); 2345 2346 VCPU_CTR0(vm, vcpuid, "activated"); 2347 CPU_SET_ATOMIC(vcpuid, &vm->active_cpus); 2348 return (0); 2349 } 2350 2351 int 2352 vm_suspend_cpu(struct vm *vm, int vcpuid) 2353 { 2354 int i; 2355 2356 if (vcpuid < -1 || vcpuid >= vm->maxcpus) 2357 return (EINVAL); 2358 2359 if (vcpuid == -1) { 2360 vm->debug_cpus = vm->active_cpus; 2361 for (i = 0; i < vm->maxcpus; i++) { 2362 if (CPU_ISSET(i, &vm->active_cpus)) 2363 vcpu_notify_event(vm, i, false); 2364 } 2365 } else { 2366 if (!CPU_ISSET(vcpuid, &vm->active_cpus)) 2367 return (EINVAL); 2368 2369 CPU_SET_ATOMIC(vcpuid, &vm->debug_cpus); 2370 vcpu_notify_event(vm, vcpuid, false); 2371 } 2372 return (0); 2373 } 2374 2375 int 2376 vm_resume_cpu(struct vm *vm, int vcpuid) 2377 { 2378 2379 if (vcpuid < -1 || vcpuid >= vm->maxcpus) 2380 return (EINVAL); 2381 2382 if (vcpuid == -1) { 2383 CPU_ZERO(&vm->debug_cpus); 2384 } else { 2385 if (!CPU_ISSET(vcpuid, &vm->debug_cpus)) 2386 return (EINVAL); 2387 2388 CPU_CLR_ATOMIC(vcpuid, &vm->debug_cpus); 2389 } 2390 return (0); 2391 } 2392 2393 int 2394 vcpu_debugged(struct vm *vm, int vcpuid) 2395 { 2396 2397 return (CPU_ISSET(vcpuid, &vm->debug_cpus)); 2398 } 2399 2400 cpuset_t 2401 vm_active_cpus(struct vm *vm) 2402 { 2403 2404 return (vm->active_cpus); 2405 } 2406 2407 cpuset_t 2408 vm_debug_cpus(struct vm *vm) 2409 { 2410 2411 return (vm->debug_cpus); 2412 } 2413 2414 cpuset_t 2415 vm_suspended_cpus(struct vm *vm) 2416 { 2417 2418 return (vm->suspended_cpus); 2419 } 2420 2421 void * 2422 vcpu_stats(struct vm *vm, int vcpuid) 2423 { 2424 2425 return (vm->vcpu[vcpuid].stats); 2426 } 2427 2428 int 2429 vm_get_x2apic_state(struct vm *vm, int vcpuid, enum x2apic_state *state) 2430 { 2431 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2432 return (EINVAL); 2433 2434 *state = vm->vcpu[vcpuid].x2apic_state; 2435 2436 return (0); 2437 } 2438 2439 int 2440 vm_set_x2apic_state(struct vm *vm, int vcpuid, enum x2apic_state state) 2441 { 2442 if (vcpuid < 0 || vcpuid >= vm->maxcpus) 2443 return (EINVAL); 2444 2445 if (state >= X2APIC_STATE_LAST) 2446 return (EINVAL); 2447 2448 vm->vcpu[vcpuid].x2apic_state = state; 2449 2450 vlapic_set_x2apic_state(vm, vcpuid, state); 2451 2452 return (0); 2453 } 2454 2455 /* 2456 * This function is called to ensure that a vcpu "sees" a pending event 2457 * as soon as possible: 2458 * - If the vcpu thread is sleeping then it is woken up. 2459 * - If the vcpu is running on a different host_cpu then an IPI will be directed 2460 * to the host_cpu to cause the vcpu to trap into the hypervisor. 2461 */ 2462 static void 2463 vcpu_notify_event_locked(struct vcpu *vcpu, bool lapic_intr) 2464 { 2465 int hostcpu; 2466 2467 hostcpu = vcpu->hostcpu; 2468 if (vcpu->state == VCPU_RUNNING) { 2469 KASSERT(hostcpu != NOCPU, ("vcpu running on invalid hostcpu")); 2470 if (hostcpu != curcpu) { 2471 if (lapic_intr) { 2472 vlapic_post_intr(vcpu->vlapic, hostcpu, 2473 vmm_ipinum); 2474 } else { 2475 ipi_cpu(hostcpu, vmm_ipinum); 2476 } 2477 } else { 2478 /* 2479 * If the 'vcpu' is running on 'curcpu' then it must 2480 * be sending a notification to itself (e.g. SELF_IPI). 2481 * The pending event will be picked up when the vcpu 2482 * transitions back to guest context. 2483 */ 2484 } 2485 } else { 2486 KASSERT(hostcpu == NOCPU, ("vcpu state %d not consistent " 2487 "with hostcpu %d", vcpu->state, hostcpu)); 2488 if (vcpu->state == VCPU_SLEEPING) 2489 wakeup_one(vcpu); 2490 } 2491 } 2492 2493 void 2494 vcpu_notify_event(struct vm *vm, int vcpuid, bool lapic_intr) 2495 { 2496 struct vcpu *vcpu = &vm->vcpu[vcpuid]; 2497 2498 vcpu_lock(vcpu); 2499 vcpu_notify_event_locked(vcpu, lapic_intr); 2500 vcpu_unlock(vcpu); 2501 } 2502 2503 struct vmspace * 2504 vm_get_vmspace(struct vm *vm) 2505 { 2506 2507 return (vm->vmspace); 2508 } 2509 2510 int 2511 vm_apicid2vcpuid(struct vm *vm, int apicid) 2512 { 2513 /* 2514 * XXX apic id is assumed to be numerically identical to vcpu id 2515 */ 2516 return (apicid); 2517 } 2518 2519 int 2520 vm_smp_rendezvous(struct vm *vm, int vcpuid, cpuset_t dest, 2521 vm_rendezvous_func_t func, void *arg) 2522 { 2523 int error, i; 2524 2525 /* 2526 * Enforce that this function is called without any locks 2527 */ 2528 WITNESS_WARN(WARN_PANIC, NULL, "vm_smp_rendezvous"); 2529 KASSERT(vcpuid == -1 || (vcpuid >= 0 && vcpuid < vm->maxcpus), 2530 ("vm_smp_rendezvous: invalid vcpuid %d", vcpuid)); 2531 2532 restart: 2533 mtx_lock(&vm->rendezvous_mtx); 2534 if (vm->rendezvous_func != NULL) { 2535 /* 2536 * If a rendezvous is already in progress then we need to 2537 * call the rendezvous handler in case this 'vcpuid' is one 2538 * of the targets of the rendezvous. 2539 */ 2540 RENDEZVOUS_CTR0(vm, vcpuid, "Rendezvous already in progress"); 2541 mtx_unlock(&vm->rendezvous_mtx); 2542 error = vm_handle_rendezvous(vm, vcpuid); 2543 if (error != 0) 2544 return (error); 2545 goto restart; 2546 } 2547 KASSERT(vm->rendezvous_func == NULL, ("vm_smp_rendezvous: previous " 2548 "rendezvous is still in progress")); 2549 2550 RENDEZVOUS_CTR0(vm, vcpuid, "Initiating rendezvous"); 2551 vm->rendezvous_req_cpus = dest; 2552 CPU_ZERO(&vm->rendezvous_done_cpus); 2553 vm->rendezvous_arg = arg; 2554 vm->rendezvous_func = func; 2555 mtx_unlock(&vm->rendezvous_mtx); 2556 2557 /* 2558 * Wake up any sleeping vcpus and trigger a VM-exit in any running 2559 * vcpus so they handle the rendezvous as soon as possible. 2560 */ 2561 for (i = 0; i < vm->maxcpus; i++) { 2562 if (CPU_ISSET(i, &dest)) 2563 vcpu_notify_event(vm, i, false); 2564 } 2565 2566 return (vm_handle_rendezvous(vm, vcpuid)); 2567 } 2568 2569 struct vatpic * 2570 vm_atpic(struct vm *vm) 2571 { 2572 return (vm->vatpic); 2573 } 2574 2575 struct vatpit * 2576 vm_atpit(struct vm *vm) 2577 { 2578 return (vm->vatpit); 2579 } 2580 2581 struct vpmtmr * 2582 vm_pmtmr(struct vm *vm) 2583 { 2584 2585 return (vm->vpmtmr); 2586 } 2587 2588 struct vrtc * 2589 vm_rtc(struct vm *vm) 2590 { 2591 2592 return (vm->vrtc); 2593 } 2594 2595 enum vm_reg_name 2596 vm_segment_name(int seg) 2597 { 2598 static enum vm_reg_name seg_names[] = { 2599 VM_REG_GUEST_ES, 2600 VM_REG_GUEST_CS, 2601 VM_REG_GUEST_SS, 2602 VM_REG_GUEST_DS, 2603 VM_REG_GUEST_FS, 2604 VM_REG_GUEST_GS 2605 }; 2606 2607 KASSERT(seg >= 0 && seg < nitems(seg_names), 2608 ("%s: invalid segment encoding %d", __func__, seg)); 2609 return (seg_names[seg]); 2610 } 2611 2612 void 2613 vm_copy_teardown(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo, 2614 int num_copyinfo) 2615 { 2616 int idx; 2617 2618 for (idx = 0; idx < num_copyinfo; idx++) { 2619 if (copyinfo[idx].cookie != NULL) 2620 vm_gpa_release(copyinfo[idx].cookie); 2621 } 2622 bzero(copyinfo, num_copyinfo * sizeof(struct vm_copyinfo)); 2623 } 2624 2625 int 2626 vm_copy_setup(struct vm *vm, int vcpuid, struct vm_guest_paging *paging, 2627 uint64_t gla, size_t len, int prot, struct vm_copyinfo *copyinfo, 2628 int num_copyinfo, int *fault) 2629 { 2630 int error, idx, nused; 2631 size_t n, off, remaining; 2632 void *hva, *cookie; 2633 uint64_t gpa; 2634 2635 bzero(copyinfo, sizeof(struct vm_copyinfo) * num_copyinfo); 2636 2637 nused = 0; 2638 remaining = len; 2639 while (remaining > 0) { 2640 KASSERT(nused < num_copyinfo, ("insufficient vm_copyinfo")); 2641 error = vm_gla2gpa(vm, vcpuid, paging, gla, prot, &gpa, fault); 2642 if (error || *fault) 2643 return (error); 2644 off = gpa & PAGE_MASK; 2645 n = min(remaining, PAGE_SIZE - off); 2646 copyinfo[nused].gpa = gpa; 2647 copyinfo[nused].len = n; 2648 remaining -= n; 2649 gla += n; 2650 nused++; 2651 } 2652 2653 for (idx = 0; idx < nused; idx++) { 2654 hva = vm_gpa_hold(vm, vcpuid, copyinfo[idx].gpa, 2655 copyinfo[idx].len, prot, &cookie); 2656 if (hva == NULL) 2657 break; 2658 copyinfo[idx].hva = hva; 2659 copyinfo[idx].cookie = cookie; 2660 } 2661 2662 if (idx != nused) { 2663 vm_copy_teardown(vm, vcpuid, copyinfo, num_copyinfo); 2664 return (EFAULT); 2665 } else { 2666 *fault = 0; 2667 return (0); 2668 } 2669 } 2670 2671 void 2672 vm_copyin(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo, void *kaddr, 2673 size_t len) 2674 { 2675 char *dst; 2676 int idx; 2677 2678 dst = kaddr; 2679 idx = 0; 2680 while (len > 0) { 2681 bcopy(copyinfo[idx].hva, dst, copyinfo[idx].len); 2682 len -= copyinfo[idx].len; 2683 dst += copyinfo[idx].len; 2684 idx++; 2685 } 2686 } 2687 2688 void 2689 vm_copyout(struct vm *vm, int vcpuid, const void *kaddr, 2690 struct vm_copyinfo *copyinfo, size_t len) 2691 { 2692 const char *src; 2693 int idx; 2694 2695 src = kaddr; 2696 idx = 0; 2697 while (len > 0) { 2698 bcopy(src, copyinfo[idx].hva, copyinfo[idx].len); 2699 len -= copyinfo[idx].len; 2700 src += copyinfo[idx].len; 2701 idx++; 2702 } 2703 } 2704 2705 /* 2706 * Return the amount of in-use and wired memory for the VM. Since 2707 * these are global stats, only return the values with for vCPU 0 2708 */ 2709 VMM_STAT_DECLARE(VMM_MEM_RESIDENT); 2710 VMM_STAT_DECLARE(VMM_MEM_WIRED); 2711 2712 static void 2713 vm_get_rescnt(struct vm *vm, int vcpu, struct vmm_stat_type *stat) 2714 { 2715 2716 if (vcpu == 0) { 2717 vmm_stat_set(vm, vcpu, VMM_MEM_RESIDENT, 2718 PAGE_SIZE * vmspace_resident_count(vm->vmspace)); 2719 } 2720 } 2721 2722 static void 2723 vm_get_wiredcnt(struct vm *vm, int vcpu, struct vmm_stat_type *stat) 2724 { 2725 2726 if (vcpu == 0) { 2727 vmm_stat_set(vm, vcpu, VMM_MEM_WIRED, 2728 PAGE_SIZE * pmap_wired_count(vmspace_pmap(vm->vmspace))); 2729 } 2730 } 2731 2732 VMM_STAT_FUNC(VMM_MEM_RESIDENT, "Resident memory", vm_get_rescnt); 2733 VMM_STAT_FUNC(VMM_MEM_WIRED, "Wired memory", vm_get_wiredcnt);
Cache object: 0cb5605a551a921025d4df9c9d48e222
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]