vmx.c revision 266593
1/*- 2 * Copyright (c) 2011 NetApp, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: stable/10/sys/amd64/vmm/intel/vmx.c 266593 2014-05-23 19:39:58Z jhb $ 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: stable/10/sys/amd64/vmm/intel/vmx.c 266593 2014-05-23 19:39:58Z jhb $"); 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/smp.h> 35#include <sys/kernel.h> 36#include <sys/malloc.h> 37#include <sys/pcpu.h> 38#include <sys/proc.h> 39#include <sys/sysctl.h> 40 41#include <vm/vm.h> 42#include <vm/pmap.h> 43 44#include <machine/psl.h> 45#include <machine/cpufunc.h> 46#include <machine/md_var.h> 47#include <machine/segments.h> 48#include <machine/smp.h> 49#include <machine/specialreg.h> 50#include <machine/vmparam.h> 51 52#include <machine/vmm.h> 53#include "vmm_host.h" 54#include "vmm_ipi.h" 55#include "vmm_msr.h" 56#include "vmm_ktr.h" 57#include "vmm_stat.h" 58#include "vlapic.h" 59#include "vlapic_priv.h" 60 61#include "vmx_msr.h" 62#include "ept.h" 63#include "vmx_cpufunc.h" 64#include "vmx.h" 65#include "x86.h" 66#include "vmx_controls.h" 67 68#define PINBASED_CTLS_ONE_SETTING \ 69 (PINBASED_EXTINT_EXITING | \ 70 PINBASED_NMI_EXITING | \ 71 PINBASED_VIRTUAL_NMI) 72#define PINBASED_CTLS_ZERO_SETTING 0 73 74#define PROCBASED_CTLS_WINDOW_SETTING \ 75 (PROCBASED_INT_WINDOW_EXITING | \ 76 PROCBASED_NMI_WINDOW_EXITING) 77 78#define PROCBASED_CTLS_ONE_SETTING \ 79 (PROCBASED_SECONDARY_CONTROLS | \ 80 PROCBASED_IO_EXITING | \ 81 PROCBASED_MSR_BITMAPS | \ 82 PROCBASED_CTLS_WINDOW_SETTING) 83#define PROCBASED_CTLS_ZERO_SETTING \ 84 (PROCBASED_CR3_LOAD_EXITING | \ 85 PROCBASED_CR3_STORE_EXITING | \ 86 PROCBASED_IO_BITMAPS) 87 88#define PROCBASED_CTLS2_ONE_SETTING PROCBASED2_ENABLE_EPT 89#define PROCBASED_CTLS2_ZERO_SETTING 0 90 91#define VM_EXIT_CTLS_ONE_SETTING_NO_PAT \ 92 (VM_EXIT_HOST_LMA | \ 93 VM_EXIT_SAVE_EFER | \ 94 VM_EXIT_LOAD_EFER) 95 96#define VM_EXIT_CTLS_ONE_SETTING \ 97 (VM_EXIT_CTLS_ONE_SETTING_NO_PAT | \ 98 VM_EXIT_ACKNOWLEDGE_INTERRUPT | \ 99 VM_EXIT_SAVE_PAT | \ 100 VM_EXIT_LOAD_PAT) 101#define VM_EXIT_CTLS_ZERO_SETTING VM_EXIT_SAVE_DEBUG_CONTROLS 102 103#define VM_ENTRY_CTLS_ONE_SETTING_NO_PAT VM_ENTRY_LOAD_EFER 104 105#define VM_ENTRY_CTLS_ONE_SETTING \ 106 (VM_ENTRY_CTLS_ONE_SETTING_NO_PAT | \ 107 VM_ENTRY_LOAD_PAT) 108#define VM_ENTRY_CTLS_ZERO_SETTING \ 109 (VM_ENTRY_LOAD_DEBUG_CONTROLS | \ 110 VM_ENTRY_INTO_SMM | \ 111 VM_ENTRY_DEACTIVATE_DUAL_MONITOR) 112 113#define guest_msr_rw(vmx, msr) \ 114 msr_bitmap_change_access((vmx)->msr_bitmap, (msr), MSR_BITMAP_ACCESS_RW) 115 116#define HANDLED 1 117#define UNHANDLED 0 118 119static MALLOC_DEFINE(M_VMX, "vmx", "vmx"); 120static MALLOC_DEFINE(M_VLAPIC, "vlapic", "vlapic"); 121 122SYSCTL_DECL(_hw_vmm); 123SYSCTL_NODE(_hw_vmm, OID_AUTO, vmx, CTLFLAG_RW, NULL, NULL); 124 125int vmxon_enabled[MAXCPU]; 126static char vmxon_region[MAXCPU][PAGE_SIZE] __aligned(PAGE_SIZE); 127 128static uint32_t pinbased_ctls, procbased_ctls, procbased_ctls2; 129static uint32_t exit_ctls, entry_ctls; 130 131static uint64_t cr0_ones_mask, cr0_zeros_mask; 132SYSCTL_ULONG(_hw_vmm_vmx, OID_AUTO, cr0_ones_mask, CTLFLAG_RD, 133 &cr0_ones_mask, 0, NULL); 134SYSCTL_ULONG(_hw_vmm_vmx, OID_AUTO, cr0_zeros_mask, CTLFLAG_RD, 135 &cr0_zeros_mask, 0, NULL); 136 137static uint64_t cr4_ones_mask, cr4_zeros_mask; 138SYSCTL_ULONG(_hw_vmm_vmx, OID_AUTO, cr4_ones_mask, CTLFLAG_RD, 139 &cr4_ones_mask, 0, NULL); 140SYSCTL_ULONG(_hw_vmm_vmx, OID_AUTO, cr4_zeros_mask, CTLFLAG_RD, 141 &cr4_zeros_mask, 0, NULL); 142 143static int vmx_no_patmsr; 144 145static int vmx_initialized; 146SYSCTL_INT(_hw_vmm_vmx, OID_AUTO, initialized, CTLFLAG_RD, 147 &vmx_initialized, 0, "Intel VMX initialized"); 148 149/* 150 * Optional capabilities 151 */ 152static int cap_halt_exit; 153static int cap_pause_exit; 154static int cap_unrestricted_guest; 155static int cap_monitor_trap; 156static int cap_invpcid; 157 158static int virtual_interrupt_delivery; 159SYSCTL_INT(_hw_vmm_vmx, OID_AUTO, virtual_interrupt_delivery, CTLFLAG_RD, 160 &virtual_interrupt_delivery, 0, "APICv virtual interrupt delivery support"); 161 162static int posted_interrupts; 163SYSCTL_INT(_hw_vmm_vmx, OID_AUTO, posted_interrupts, CTLFLAG_RD, 164 &posted_interrupts, 0, "APICv posted interrupt support"); 165 166static int pirvec; 167SYSCTL_INT(_hw_vmm_vmx, OID_AUTO, posted_interrupt_vector, CTLFLAG_RD, 168 &pirvec, 0, "APICv posted interrupt vector"); 169 170static struct unrhdr *vpid_unr; 171static u_int vpid_alloc_failed; 172SYSCTL_UINT(_hw_vmm_vmx, OID_AUTO, vpid_alloc_failed, CTLFLAG_RD, 173 &vpid_alloc_failed, 0, NULL); 174 175/* 176 * Use the last page below 4GB as the APIC access address. This address is 177 * occupied by the boot firmware so it is guaranteed that it will not conflict 178 * with a page in system memory. 179 */ 180#define APIC_ACCESS_ADDRESS 0xFFFFF000 181 182static void vmx_inject_pir(struct vlapic *vlapic); 183 184#ifdef KTR 185static const char * 186exit_reason_to_str(int reason) 187{ 188 static char reasonbuf[32]; 189 190 switch (reason) { 191 case EXIT_REASON_EXCEPTION: 192 return "exception"; 193 case EXIT_REASON_EXT_INTR: 194 return "extint"; 195 case EXIT_REASON_TRIPLE_FAULT: 196 return "triplefault"; 197 case EXIT_REASON_INIT: 198 return "init"; 199 case EXIT_REASON_SIPI: 200 return "sipi"; 201 case EXIT_REASON_IO_SMI: 202 return "iosmi"; 203 case EXIT_REASON_SMI: 204 return "smi"; 205 case EXIT_REASON_INTR_WINDOW: 206 return "intrwindow"; 207 case EXIT_REASON_NMI_WINDOW: 208 return "nmiwindow"; 209 case EXIT_REASON_TASK_SWITCH: 210 return "taskswitch"; 211 case EXIT_REASON_CPUID: 212 return "cpuid"; 213 case EXIT_REASON_GETSEC: 214 return "getsec"; 215 case EXIT_REASON_HLT: 216 return "hlt"; 217 case EXIT_REASON_INVD: 218 return "invd"; 219 case EXIT_REASON_INVLPG: 220 return "invlpg"; 221 case EXIT_REASON_RDPMC: 222 return "rdpmc"; 223 case EXIT_REASON_RDTSC: 224 return "rdtsc"; 225 case EXIT_REASON_RSM: 226 return "rsm"; 227 case EXIT_REASON_VMCALL: 228 return "vmcall"; 229 case EXIT_REASON_VMCLEAR: 230 return "vmclear"; 231 case EXIT_REASON_VMLAUNCH: 232 return "vmlaunch"; 233 case EXIT_REASON_VMPTRLD: 234 return "vmptrld"; 235 case EXIT_REASON_VMPTRST: 236 return "vmptrst"; 237 case EXIT_REASON_VMREAD: 238 return "vmread"; 239 case EXIT_REASON_VMRESUME: 240 return "vmresume"; 241 case EXIT_REASON_VMWRITE: 242 return "vmwrite"; 243 case EXIT_REASON_VMXOFF: 244 return "vmxoff"; 245 case EXIT_REASON_VMXON: 246 return "vmxon"; 247 case EXIT_REASON_CR_ACCESS: 248 return "craccess"; 249 case EXIT_REASON_DR_ACCESS: 250 return "draccess"; 251 case EXIT_REASON_INOUT: 252 return "inout"; 253 case EXIT_REASON_RDMSR: 254 return "rdmsr"; 255 case EXIT_REASON_WRMSR: 256 return "wrmsr"; 257 case EXIT_REASON_INVAL_VMCS: 258 return "invalvmcs"; 259 case EXIT_REASON_INVAL_MSR: 260 return "invalmsr"; 261 case EXIT_REASON_MWAIT: 262 return "mwait"; 263 case EXIT_REASON_MTF: 264 return "mtf"; 265 case EXIT_REASON_MONITOR: 266 return "monitor"; 267 case EXIT_REASON_PAUSE: 268 return "pause"; 269 case EXIT_REASON_MCE: 270 return "mce"; 271 case EXIT_REASON_TPR: 272 return "tpr"; 273 case EXIT_REASON_APIC_ACCESS: 274 return "apic-access"; 275 case EXIT_REASON_GDTR_IDTR: 276 return "gdtridtr"; 277 case EXIT_REASON_LDTR_TR: 278 return "ldtrtr"; 279 case EXIT_REASON_EPT_FAULT: 280 return "eptfault"; 281 case EXIT_REASON_EPT_MISCONFIG: 282 return "eptmisconfig"; 283 case EXIT_REASON_INVEPT: 284 return "invept"; 285 case EXIT_REASON_RDTSCP: 286 return "rdtscp"; 287 case EXIT_REASON_VMX_PREEMPT: 288 return "vmxpreempt"; 289 case EXIT_REASON_INVVPID: 290 return "invvpid"; 291 case EXIT_REASON_WBINVD: 292 return "wbinvd"; 293 case EXIT_REASON_XSETBV: 294 return "xsetbv"; 295 case EXIT_REASON_APIC_WRITE: 296 return "apic-write"; 297 default: 298 snprintf(reasonbuf, sizeof(reasonbuf), "%d", reason); 299 return (reasonbuf); 300 } 301} 302#endif /* KTR */ 303 304u_long 305vmx_fix_cr0(u_long cr0) 306{ 307 308 return ((cr0 | cr0_ones_mask) & ~cr0_zeros_mask); 309} 310 311u_long 312vmx_fix_cr4(u_long cr4) 313{ 314 315 return ((cr4 | cr4_ones_mask) & ~cr4_zeros_mask); 316} 317 318static void 319vpid_free(int vpid) 320{ 321 if (vpid < 0 || vpid > 0xffff) 322 panic("vpid_free: invalid vpid %d", vpid); 323 324 /* 325 * VPIDs [0,VM_MAXCPU] are special and are not allocated from 326 * the unit number allocator. 327 */ 328 329 if (vpid > VM_MAXCPU) 330 free_unr(vpid_unr, vpid); 331} 332 333static void 334vpid_alloc(uint16_t *vpid, int num) 335{ 336 int i, x; 337 338 if (num <= 0 || num > VM_MAXCPU) 339 panic("invalid number of vpids requested: %d", num); 340 341 /* 342 * If the "enable vpid" execution control is not enabled then the 343 * VPID is required to be 0 for all vcpus. 344 */ 345 if ((procbased_ctls2 & PROCBASED2_ENABLE_VPID) == 0) { 346 for (i = 0; i < num; i++) 347 vpid[i] = 0; 348 return; 349 } 350 351 /* 352 * Allocate a unique VPID for each vcpu from the unit number allocator. 353 */ 354 for (i = 0; i < num; i++) { 355 x = alloc_unr(vpid_unr); 356 if (x == -1) 357 break; 358 else 359 vpid[i] = x; 360 } 361 362 if (i < num) { 363 atomic_add_int(&vpid_alloc_failed, 1); 364 365 /* 366 * If the unit number allocator does not have enough unique 367 * VPIDs then we need to allocate from the [1,VM_MAXCPU] range. 368 * 369 * These VPIDs are not be unique across VMs but this does not 370 * affect correctness because the combined mappings are also 371 * tagged with the EP4TA which is unique for each VM. 372 * 373 * It is still sub-optimal because the invvpid will invalidate 374 * combined mappings for a particular VPID across all EP4TAs. 375 */ 376 while (i-- > 0) 377 vpid_free(vpid[i]); 378 379 for (i = 0; i < num; i++) 380 vpid[i] = i + 1; 381 } 382} 383 384static void 385vpid_init(void) 386{ 387 /* 388 * VPID 0 is required when the "enable VPID" execution control is 389 * disabled. 390 * 391 * VPIDs [1,VM_MAXCPU] are used as the "overflow namespace" when the 392 * unit number allocator does not have sufficient unique VPIDs to 393 * satisfy the allocation. 394 * 395 * The remaining VPIDs are managed by the unit number allocator. 396 */ 397 vpid_unr = new_unrhdr(VM_MAXCPU + 1, 0xffff, NULL); 398} 399 400static void 401msr_save_area_init(struct msr_entry *g_area, int *g_count) 402{ 403 int cnt; 404 405 static struct msr_entry guest_msrs[] = { 406 { MSR_KGSBASE, 0, 0 }, 407 }; 408 409 cnt = sizeof(guest_msrs) / sizeof(guest_msrs[0]); 410 if (cnt > GUEST_MSR_MAX_ENTRIES) 411 panic("guest msr save area overrun"); 412 bcopy(guest_msrs, g_area, sizeof(guest_msrs)); 413 *g_count = cnt; 414} 415 416static void 417vmx_disable(void *arg __unused) 418{ 419 struct invvpid_desc invvpid_desc = { 0 }; 420 struct invept_desc invept_desc = { 0 }; 421 422 if (vmxon_enabled[curcpu]) { 423 /* 424 * See sections 25.3.3.3 and 25.3.3.4 in Intel Vol 3b. 425 * 426 * VMXON or VMXOFF are not required to invalidate any TLB 427 * caching structures. This prevents potential retention of 428 * cached information in the TLB between distinct VMX episodes. 429 */ 430 invvpid(INVVPID_TYPE_ALL_CONTEXTS, invvpid_desc); 431 invept(INVEPT_TYPE_ALL_CONTEXTS, invept_desc); 432 vmxoff(); 433 } 434 load_cr4(rcr4() & ~CR4_VMXE); 435} 436 437static int 438vmx_cleanup(void) 439{ 440 441 if (pirvec != 0) 442 vmm_ipi_free(pirvec); 443 444 if (vpid_unr != NULL) { 445 delete_unrhdr(vpid_unr); 446 vpid_unr = NULL; 447 } 448 449 smp_rendezvous(NULL, vmx_disable, NULL, NULL); 450 451 return (0); 452} 453 454static void 455vmx_enable(void *arg __unused) 456{ 457 int error; 458 459 load_cr4(rcr4() | CR4_VMXE); 460 461 *(uint32_t *)vmxon_region[curcpu] = vmx_revision(); 462 error = vmxon(vmxon_region[curcpu]); 463 if (error == 0) 464 vmxon_enabled[curcpu] = 1; 465} 466 467static void 468vmx_restore(void) 469{ 470 471 if (vmxon_enabled[curcpu]) 472 vmxon(vmxon_region[curcpu]); 473} 474 475static int 476vmx_init(int ipinum) 477{ 478 int error, use_tpr_shadow; 479 uint64_t fixed0, fixed1, feature_control; 480 uint32_t tmp, procbased2_vid_bits; 481 482 /* CPUID.1:ECX[bit 5] must be 1 for processor to support VMX */ 483 if (!(cpu_feature2 & CPUID2_VMX)) { 484 printf("vmx_init: processor does not support VMX operation\n"); 485 return (ENXIO); 486 } 487 488 /* 489 * Verify that MSR_IA32_FEATURE_CONTROL lock and VMXON enable bits 490 * are set (bits 0 and 2 respectively). 491 */ 492 feature_control = rdmsr(MSR_IA32_FEATURE_CONTROL); 493 if ((feature_control & IA32_FEATURE_CONTROL_LOCK) == 0 || 494 (feature_control & IA32_FEATURE_CONTROL_VMX_EN) == 0) { 495 printf("vmx_init: VMX operation disabled by BIOS\n"); 496 return (ENXIO); 497 } 498 499 /* Check support for primary processor-based VM-execution controls */ 500 error = vmx_set_ctlreg(MSR_VMX_PROCBASED_CTLS, 501 MSR_VMX_TRUE_PROCBASED_CTLS, 502 PROCBASED_CTLS_ONE_SETTING, 503 PROCBASED_CTLS_ZERO_SETTING, &procbased_ctls); 504 if (error) { 505 printf("vmx_init: processor does not support desired primary " 506 "processor-based controls\n"); 507 return (error); 508 } 509 510 /* Clear the processor-based ctl bits that are set on demand */ 511 procbased_ctls &= ~PROCBASED_CTLS_WINDOW_SETTING; 512 513 /* Check support for secondary processor-based VM-execution controls */ 514 error = vmx_set_ctlreg(MSR_VMX_PROCBASED_CTLS2, 515 MSR_VMX_PROCBASED_CTLS2, 516 PROCBASED_CTLS2_ONE_SETTING, 517 PROCBASED_CTLS2_ZERO_SETTING, &procbased_ctls2); 518 if (error) { 519 printf("vmx_init: processor does not support desired secondary " 520 "processor-based controls\n"); 521 return (error); 522 } 523 524 /* Check support for VPID */ 525 error = vmx_set_ctlreg(MSR_VMX_PROCBASED_CTLS2, MSR_VMX_PROCBASED_CTLS2, 526 PROCBASED2_ENABLE_VPID, 0, &tmp); 527 if (error == 0) 528 procbased_ctls2 |= PROCBASED2_ENABLE_VPID; 529 530 /* Check support for pin-based VM-execution controls */ 531 error = vmx_set_ctlreg(MSR_VMX_PINBASED_CTLS, 532 MSR_VMX_TRUE_PINBASED_CTLS, 533 PINBASED_CTLS_ONE_SETTING, 534 PINBASED_CTLS_ZERO_SETTING, &pinbased_ctls); 535 if (error) { 536 printf("vmx_init: processor does not support desired " 537 "pin-based controls\n"); 538 return (error); 539 } 540 541 /* Check support for VM-exit controls */ 542 error = vmx_set_ctlreg(MSR_VMX_EXIT_CTLS, MSR_VMX_TRUE_EXIT_CTLS, 543 VM_EXIT_CTLS_ONE_SETTING, 544 VM_EXIT_CTLS_ZERO_SETTING, 545 &exit_ctls); 546 if (error) { 547 /* Try again without the PAT MSR bits */ 548 error = vmx_set_ctlreg(MSR_VMX_EXIT_CTLS, 549 MSR_VMX_TRUE_EXIT_CTLS, 550 VM_EXIT_CTLS_ONE_SETTING_NO_PAT, 551 VM_EXIT_CTLS_ZERO_SETTING, 552 &exit_ctls); 553 if (error) { 554 printf("vmx_init: processor does not support desired " 555 "exit controls\n"); 556 return (error); 557 } else { 558 if (bootverbose) 559 printf("vmm: PAT MSR access not supported\n"); 560 guest_msr_valid(MSR_PAT); 561 vmx_no_patmsr = 1; 562 } 563 } 564 565 /* Check support for VM-entry controls */ 566 if (!vmx_no_patmsr) { 567 error = vmx_set_ctlreg(MSR_VMX_ENTRY_CTLS, 568 MSR_VMX_TRUE_ENTRY_CTLS, 569 VM_ENTRY_CTLS_ONE_SETTING, 570 VM_ENTRY_CTLS_ZERO_SETTING, 571 &entry_ctls); 572 } else { 573 error = vmx_set_ctlreg(MSR_VMX_ENTRY_CTLS, 574 MSR_VMX_TRUE_ENTRY_CTLS, 575 VM_ENTRY_CTLS_ONE_SETTING_NO_PAT, 576 VM_ENTRY_CTLS_ZERO_SETTING, 577 &entry_ctls); 578 } 579 580 if (error) { 581 printf("vmx_init: processor does not support desired " 582 "entry controls\n"); 583 return (error); 584 } 585 586 /* 587 * Check support for optional features by testing them 588 * as individual bits 589 */ 590 cap_halt_exit = (vmx_set_ctlreg(MSR_VMX_PROCBASED_CTLS, 591 MSR_VMX_TRUE_PROCBASED_CTLS, 592 PROCBASED_HLT_EXITING, 0, 593 &tmp) == 0); 594 595 cap_monitor_trap = (vmx_set_ctlreg(MSR_VMX_PROCBASED_CTLS, 596 MSR_VMX_PROCBASED_CTLS, 597 PROCBASED_MTF, 0, 598 &tmp) == 0); 599 600 cap_pause_exit = (vmx_set_ctlreg(MSR_VMX_PROCBASED_CTLS, 601 MSR_VMX_TRUE_PROCBASED_CTLS, 602 PROCBASED_PAUSE_EXITING, 0, 603 &tmp) == 0); 604 605 cap_unrestricted_guest = (vmx_set_ctlreg(MSR_VMX_PROCBASED_CTLS2, 606 MSR_VMX_PROCBASED_CTLS2, 607 PROCBASED2_UNRESTRICTED_GUEST, 0, 608 &tmp) == 0); 609 610 cap_invpcid = (vmx_set_ctlreg(MSR_VMX_PROCBASED_CTLS2, 611 MSR_VMX_PROCBASED_CTLS2, PROCBASED2_ENABLE_INVPCID, 0, 612 &tmp) == 0); 613 614 /* 615 * Check support for virtual interrupt delivery. 616 */ 617 procbased2_vid_bits = (PROCBASED2_VIRTUALIZE_APIC_ACCESSES | 618 PROCBASED2_VIRTUALIZE_X2APIC_MODE | 619 PROCBASED2_APIC_REGISTER_VIRTUALIZATION | 620 PROCBASED2_VIRTUAL_INTERRUPT_DELIVERY); 621 622 use_tpr_shadow = (vmx_set_ctlreg(MSR_VMX_PROCBASED_CTLS, 623 MSR_VMX_TRUE_PROCBASED_CTLS, PROCBASED_USE_TPR_SHADOW, 0, 624 &tmp) == 0); 625 626 error = vmx_set_ctlreg(MSR_VMX_PROCBASED_CTLS2, MSR_VMX_PROCBASED_CTLS2, 627 procbased2_vid_bits, 0, &tmp); 628 if (error == 0 && use_tpr_shadow) { 629 virtual_interrupt_delivery = 1; 630 TUNABLE_INT_FETCH("hw.vmm.vmx.use_apic_vid", 631 &virtual_interrupt_delivery); 632 } 633 634 if (virtual_interrupt_delivery) { 635 procbased_ctls |= PROCBASED_USE_TPR_SHADOW; 636 procbased_ctls2 |= procbased2_vid_bits; 637 procbased_ctls2 &= ~PROCBASED2_VIRTUALIZE_X2APIC_MODE; 638 639 /* 640 * Check for Posted Interrupts only if Virtual Interrupt 641 * Delivery is enabled. 642 */ 643 error = vmx_set_ctlreg(MSR_VMX_PINBASED_CTLS, 644 MSR_VMX_TRUE_PINBASED_CTLS, PINBASED_POSTED_INTERRUPT, 0, 645 &tmp); 646 if (error == 0) { 647 pirvec = vmm_ipi_alloc(); 648 if (pirvec == 0) { 649 if (bootverbose) { 650 printf("vmx_init: unable to allocate " 651 "posted interrupt vector\n"); 652 } 653 } else { 654 posted_interrupts = 1; 655 TUNABLE_INT_FETCH("hw.vmm.vmx.use_apic_pir", 656 &posted_interrupts); 657 } 658 } 659 } 660 661 if (posted_interrupts) 662 pinbased_ctls |= PINBASED_POSTED_INTERRUPT; 663 664 /* Initialize EPT */ 665 error = ept_init(ipinum); 666 if (error) { 667 printf("vmx_init: ept initialization failed (%d)\n", error); 668 return (error); 669 } 670 671 /* 672 * Stash the cr0 and cr4 bits that must be fixed to 0 or 1 673 */ 674 fixed0 = rdmsr(MSR_VMX_CR0_FIXED0); 675 fixed1 = rdmsr(MSR_VMX_CR0_FIXED1); 676 cr0_ones_mask = fixed0 & fixed1; 677 cr0_zeros_mask = ~fixed0 & ~fixed1; 678 679 /* 680 * CR0_PE and CR0_PG can be set to zero in VMX non-root operation 681 * if unrestricted guest execution is allowed. 682 */ 683 if (cap_unrestricted_guest) 684 cr0_ones_mask &= ~(CR0_PG | CR0_PE); 685 686 /* 687 * Do not allow the guest to set CR0_NW or CR0_CD. 688 */ 689 cr0_zeros_mask |= (CR0_NW | CR0_CD); 690 691 fixed0 = rdmsr(MSR_VMX_CR4_FIXED0); 692 fixed1 = rdmsr(MSR_VMX_CR4_FIXED1); 693 cr4_ones_mask = fixed0 & fixed1; 694 cr4_zeros_mask = ~fixed0 & ~fixed1; 695 696 vpid_init(); 697 698 /* enable VMX operation */ 699 smp_rendezvous(NULL, vmx_enable, NULL, NULL); 700 701 vmx_initialized = 1; 702 703 return (0); 704} 705 706static void 707vmx_trigger_hostintr(int vector) 708{ 709 uintptr_t func; 710 struct gate_descriptor *gd; 711 712 gd = &idt[vector]; 713 714 KASSERT(vector >= 32 && vector <= 255, ("vmx_trigger_hostintr: " 715 "invalid vector %d", vector)); 716 KASSERT(gd->gd_p == 1, ("gate descriptor for vector %d not present", 717 vector)); 718 KASSERT(gd->gd_type == SDT_SYSIGT, ("gate descriptor for vector %d " 719 "has invalid type %d", vector, gd->gd_type)); 720 KASSERT(gd->gd_dpl == SEL_KPL, ("gate descriptor for vector %d " 721 "has invalid dpl %d", vector, gd->gd_dpl)); 722 KASSERT(gd->gd_selector == GSEL(GCODE_SEL, SEL_KPL), ("gate descriptor " 723 "for vector %d has invalid selector %d", vector, gd->gd_selector)); 724 KASSERT(gd->gd_ist == 0, ("gate descriptor for vector %d has invalid " 725 "IST %d", vector, gd->gd_ist)); 726 727 func = ((long)gd->gd_hioffset << 16 | gd->gd_looffset); 728 vmx_call_isr(func); 729} 730 731static int 732vmx_setup_cr_shadow(int which, struct vmcs *vmcs, uint32_t initial) 733{ 734 int error, mask_ident, shadow_ident; 735 uint64_t mask_value; 736 737 if (which != 0 && which != 4) 738 panic("vmx_setup_cr_shadow: unknown cr%d", which); 739 740 if (which == 0) { 741 mask_ident = VMCS_CR0_MASK; 742 mask_value = cr0_ones_mask | cr0_zeros_mask; 743 shadow_ident = VMCS_CR0_SHADOW; 744 } else { 745 mask_ident = VMCS_CR4_MASK; 746 mask_value = cr4_ones_mask | cr4_zeros_mask; 747 shadow_ident = VMCS_CR4_SHADOW; 748 } 749 750 error = vmcs_setreg(vmcs, 0, VMCS_IDENT(mask_ident), mask_value); 751 if (error) 752 return (error); 753 754 error = vmcs_setreg(vmcs, 0, VMCS_IDENT(shadow_ident), initial); 755 if (error) 756 return (error); 757 758 return (0); 759} 760#define vmx_setup_cr0_shadow(vmcs,init) vmx_setup_cr_shadow(0, (vmcs), (init)) 761#define vmx_setup_cr4_shadow(vmcs,init) vmx_setup_cr_shadow(4, (vmcs), (init)) 762 763static void * 764vmx_vminit(struct vm *vm, pmap_t pmap) 765{ 766 uint16_t vpid[VM_MAXCPU]; 767 int i, error, guest_msr_count; 768 struct vmx *vmx; 769 struct vmcs *vmcs; 770 771 vmx = malloc(sizeof(struct vmx), M_VMX, M_WAITOK | M_ZERO); 772 if ((uintptr_t)vmx & PAGE_MASK) { 773 panic("malloc of struct vmx not aligned on %d byte boundary", 774 PAGE_SIZE); 775 } 776 vmx->vm = vm; 777 778 vmx->eptp = eptp(vtophys((vm_offset_t)pmap->pm_pml4)); 779 780 /* 781 * Clean up EPTP-tagged guest physical and combined mappings 782 * 783 * VMX transitions are not required to invalidate any guest physical 784 * mappings. So, it may be possible for stale guest physical mappings 785 * to be present in the processor TLBs. 786 * 787 * Combined mappings for this EP4TA are also invalidated for all VPIDs. 788 */ 789 ept_invalidate_mappings(vmx->eptp); 790 791 msr_bitmap_initialize(vmx->msr_bitmap); 792 793 /* 794 * It is safe to allow direct access to MSR_GSBASE and MSR_FSBASE. 795 * The guest FSBASE and GSBASE are saved and restored during 796 * vm-exit and vm-entry respectively. The host FSBASE and GSBASE are 797 * always restored from the vmcs host state area on vm-exit. 798 * 799 * The SYSENTER_CS/ESP/EIP MSRs are identical to FS/GSBASE in 800 * how they are saved/restored so can be directly accessed by the 801 * guest. 802 * 803 * Guest KGSBASE is saved and restored in the guest MSR save area. 804 * Host KGSBASE is restored before returning to userland from the pcb. 805 * There will be a window of time when we are executing in the host 806 * kernel context with a value of KGSBASE from the guest. This is ok 807 * because the value of KGSBASE is inconsequential in kernel context. 808 * 809 * MSR_EFER is saved and restored in the guest VMCS area on a 810 * VM exit and entry respectively. It is also restored from the 811 * host VMCS area on a VM exit. 812 */ 813 if (guest_msr_rw(vmx, MSR_GSBASE) || 814 guest_msr_rw(vmx, MSR_FSBASE) || 815 guest_msr_rw(vmx, MSR_SYSENTER_CS_MSR) || 816 guest_msr_rw(vmx, MSR_SYSENTER_ESP_MSR) || 817 guest_msr_rw(vmx, MSR_SYSENTER_EIP_MSR) || 818 guest_msr_rw(vmx, MSR_KGSBASE) || 819 guest_msr_rw(vmx, MSR_EFER)) 820 panic("vmx_vminit: error setting guest msr access"); 821 822 /* 823 * MSR_PAT is saved and restored in the guest VMCS are on a VM exit 824 * and entry respectively. It is also restored from the host VMCS 825 * area on a VM exit. However, if running on a system with no 826 * MSR_PAT save/restore support, leave access disabled so accesses 827 * will be trapped. 828 */ 829 if (!vmx_no_patmsr && guest_msr_rw(vmx, MSR_PAT)) 830 panic("vmx_vminit: error setting guest pat msr access"); 831 832 vpid_alloc(vpid, VM_MAXCPU); 833 834 if (virtual_interrupt_delivery) { 835 error = vm_map_mmio(vm, DEFAULT_APIC_BASE, PAGE_SIZE, 836 APIC_ACCESS_ADDRESS); 837 /* XXX this should really return an error to the caller */ 838 KASSERT(error == 0, ("vm_map_mmio(apicbase) error %d", error)); 839 } 840 841 for (i = 0; i < VM_MAXCPU; i++) { 842 vmcs = &vmx->vmcs[i]; 843 vmcs->identifier = vmx_revision(); 844 error = vmclear(vmcs); 845 if (error != 0) { 846 panic("vmx_vminit: vmclear error %d on vcpu %d\n", 847 error, i); 848 } 849 850 error = vmcs_init(vmcs); 851 KASSERT(error == 0, ("vmcs_init error %d", error)); 852 853 VMPTRLD(vmcs); 854 error = 0; 855 error += vmwrite(VMCS_HOST_RSP, (u_long)&vmx->ctx[i]); 856 error += vmwrite(VMCS_EPTP, vmx->eptp); 857 error += vmwrite(VMCS_PIN_BASED_CTLS, pinbased_ctls); 858 error += vmwrite(VMCS_PRI_PROC_BASED_CTLS, procbased_ctls); 859 error += vmwrite(VMCS_SEC_PROC_BASED_CTLS, procbased_ctls2); 860 error += vmwrite(VMCS_EXIT_CTLS, exit_ctls); 861 error += vmwrite(VMCS_ENTRY_CTLS, entry_ctls); 862 error += vmwrite(VMCS_MSR_BITMAP, vtophys(vmx->msr_bitmap)); 863 error += vmwrite(VMCS_VPID, vpid[i]); 864 if (virtual_interrupt_delivery) { 865 error += vmwrite(VMCS_APIC_ACCESS, APIC_ACCESS_ADDRESS); 866 error += vmwrite(VMCS_VIRTUAL_APIC, 867 vtophys(&vmx->apic_page[i])); 868 error += vmwrite(VMCS_EOI_EXIT0, 0); 869 error += vmwrite(VMCS_EOI_EXIT1, 0); 870 error += vmwrite(VMCS_EOI_EXIT2, 0); 871 error += vmwrite(VMCS_EOI_EXIT3, 0); 872 } 873 if (posted_interrupts) { 874 error += vmwrite(VMCS_PIR_VECTOR, pirvec); 875 error += vmwrite(VMCS_PIR_DESC, 876 vtophys(&vmx->pir_desc[i])); 877 } 878 VMCLEAR(vmcs); 879 KASSERT(error == 0, ("vmx_vminit: error customizing the vmcs")); 880 881 vmx->cap[i].set = 0; 882 vmx->cap[i].proc_ctls = procbased_ctls; 883 vmx->cap[i].proc_ctls2 = procbased_ctls2; 884 885 vmx->state[i].lastcpu = -1; 886 vmx->state[i].vpid = vpid[i]; 887 888 msr_save_area_init(vmx->guest_msrs[i], &guest_msr_count); 889 890 error = vmcs_set_msr_save(vmcs, vtophys(vmx->guest_msrs[i]), 891 guest_msr_count); 892 if (error != 0) 893 panic("vmcs_set_msr_save error %d", error); 894 895 /* 896 * Set up the CR0/4 shadows, and init the read shadow 897 * to the power-on register value from the Intel Sys Arch. 898 * CR0 - 0x60000010 899 * CR4 - 0 900 */ 901 error = vmx_setup_cr0_shadow(vmcs, 0x60000010); 902 if (error != 0) 903 panic("vmx_setup_cr0_shadow %d", error); 904 905 error = vmx_setup_cr4_shadow(vmcs, 0); 906 if (error != 0) 907 panic("vmx_setup_cr4_shadow %d", error); 908 909 vmx->ctx[i].pmap = pmap; 910 } 911 912 return (vmx); 913} 914 915static int 916vmx_handle_cpuid(struct vm *vm, int vcpu, struct vmxctx *vmxctx) 917{ 918 int handled, func; 919 920 func = vmxctx->guest_rax; 921 922 handled = x86_emulate_cpuid(vm, vcpu, 923 (uint32_t*)(&vmxctx->guest_rax), 924 (uint32_t*)(&vmxctx->guest_rbx), 925 (uint32_t*)(&vmxctx->guest_rcx), 926 (uint32_t*)(&vmxctx->guest_rdx)); 927 return (handled); 928} 929 930static __inline void 931vmx_run_trace(struct vmx *vmx, int vcpu) 932{ 933#ifdef KTR 934 VCPU_CTR1(vmx->vm, vcpu, "Resume execution at %#lx", vmcs_guest_rip()); 935#endif 936} 937 938static __inline void 939vmx_exit_trace(struct vmx *vmx, int vcpu, uint64_t rip, uint32_t exit_reason, 940 int handled) 941{ 942#ifdef KTR 943 VCPU_CTR3(vmx->vm, vcpu, "%s %s vmexit at 0x%0lx", 944 handled ? "handled" : "unhandled", 945 exit_reason_to_str(exit_reason), rip); 946#endif 947} 948 949static __inline void 950vmx_astpending_trace(struct vmx *vmx, int vcpu, uint64_t rip) 951{ 952#ifdef KTR 953 VCPU_CTR1(vmx->vm, vcpu, "astpending vmexit at 0x%0lx", rip); 954#endif 955} 956 957static VMM_STAT_INTEL(VCPU_INVVPID_SAVED, "Number of vpid invalidations saved"); 958 959static void 960vmx_set_pcpu_defaults(struct vmx *vmx, int vcpu, pmap_t pmap) 961{ 962 struct vmxstate *vmxstate; 963 struct invvpid_desc invvpid_desc; 964 965 vmxstate = &vmx->state[vcpu]; 966 if (vmxstate->lastcpu == curcpu) 967 return; 968 969 vmxstate->lastcpu = curcpu; 970 971 vmm_stat_incr(vmx->vm, vcpu, VCPU_MIGRATIONS, 1); 972 973 vmcs_write(VMCS_HOST_TR_BASE, vmm_get_host_trbase()); 974 vmcs_write(VMCS_HOST_GDTR_BASE, vmm_get_host_gdtrbase()); 975 vmcs_write(VMCS_HOST_GS_BASE, vmm_get_host_gsbase()); 976 977 /* 978 * If we are using VPIDs then invalidate all mappings tagged with 'vpid' 979 * 980 * We do this because this vcpu was executing on a different host 981 * cpu when it last ran. We do not track whether it invalidated 982 * mappings associated with its 'vpid' during that run. So we must 983 * assume that the mappings associated with 'vpid' on 'curcpu' are 984 * stale and invalidate them. 985 * 986 * Note that we incur this penalty only when the scheduler chooses to 987 * move the thread associated with this vcpu between host cpus. 988 * 989 * Note also that this will invalidate mappings tagged with 'vpid' 990 * for "all" EP4TAs. 991 */ 992 if (vmxstate->vpid != 0) { 993 if (pmap->pm_eptgen == vmx->eptgen[curcpu]) { 994 invvpid_desc._res1 = 0; 995 invvpid_desc._res2 = 0; 996 invvpid_desc.vpid = vmxstate->vpid; 997 invvpid(INVVPID_TYPE_SINGLE_CONTEXT, invvpid_desc); 998 } else { 999 /* 1000 * The invvpid can be skipped if an invept is going to 1001 * be performed before entering the guest. The invept 1002 * will invalidate combined mappings tagged with 1003 * 'vmx->eptp' for all vpids. 1004 */ 1005 vmm_stat_incr(vmx->vm, vcpu, VCPU_INVVPID_SAVED, 1); 1006 } 1007 } 1008} 1009 1010/* 1011 * We depend on 'procbased_ctls' to have the Interrupt Window Exiting bit set. 1012 */ 1013CTASSERT((PROCBASED_CTLS_ONE_SETTING & PROCBASED_INT_WINDOW_EXITING) != 0); 1014 1015static void __inline 1016vmx_set_int_window_exiting(struct vmx *vmx, int vcpu) 1017{ 1018 1019 if ((vmx->cap[vcpu].proc_ctls & PROCBASED_INT_WINDOW_EXITING) == 0) { 1020 vmx->cap[vcpu].proc_ctls |= PROCBASED_INT_WINDOW_EXITING; 1021 vmcs_write(VMCS_PRI_PROC_BASED_CTLS, vmx->cap[vcpu].proc_ctls); 1022 VCPU_CTR0(vmx->vm, vcpu, "Enabling interrupt window exiting"); 1023 } 1024} 1025 1026static void __inline 1027vmx_clear_int_window_exiting(struct vmx *vmx, int vcpu) 1028{ 1029 1030 KASSERT((vmx->cap[vcpu].proc_ctls & PROCBASED_INT_WINDOW_EXITING) != 0, 1031 ("intr_window_exiting not set: %#x", vmx->cap[vcpu].proc_ctls)); 1032 vmx->cap[vcpu].proc_ctls &= ~PROCBASED_INT_WINDOW_EXITING; 1033 vmcs_write(VMCS_PRI_PROC_BASED_CTLS, vmx->cap[vcpu].proc_ctls); 1034 VCPU_CTR0(vmx->vm, vcpu, "Disabling interrupt window exiting"); 1035} 1036 1037static void __inline 1038vmx_set_nmi_window_exiting(struct vmx *vmx, int vcpu) 1039{ 1040 1041 if ((vmx->cap[vcpu].proc_ctls & PROCBASED_NMI_WINDOW_EXITING) == 0) { 1042 vmx->cap[vcpu].proc_ctls |= PROCBASED_NMI_WINDOW_EXITING; 1043 vmcs_write(VMCS_PRI_PROC_BASED_CTLS, vmx->cap[vcpu].proc_ctls); 1044 VCPU_CTR0(vmx->vm, vcpu, "Enabling NMI window exiting"); 1045 } 1046} 1047 1048static void __inline 1049vmx_clear_nmi_window_exiting(struct vmx *vmx, int vcpu) 1050{ 1051 1052 KASSERT((vmx->cap[vcpu].proc_ctls & PROCBASED_NMI_WINDOW_EXITING) != 0, 1053 ("nmi_window_exiting not set %#x", vmx->cap[vcpu].proc_ctls)); 1054 vmx->cap[vcpu].proc_ctls &= ~PROCBASED_NMI_WINDOW_EXITING; 1055 vmcs_write(VMCS_PRI_PROC_BASED_CTLS, vmx->cap[vcpu].proc_ctls); 1056 VCPU_CTR0(vmx->vm, vcpu, "Disabling NMI window exiting"); 1057} 1058 1059#define NMI_BLOCKING (VMCS_INTERRUPTIBILITY_NMI_BLOCKING | \ 1060 VMCS_INTERRUPTIBILITY_MOVSS_BLOCKING) 1061#define HWINTR_BLOCKING (VMCS_INTERRUPTIBILITY_STI_BLOCKING | \ 1062 VMCS_INTERRUPTIBILITY_MOVSS_BLOCKING) 1063 1064static void 1065vmx_inject_nmi(struct vmx *vmx, int vcpu) 1066{ 1067 uint32_t gi, info; 1068 1069 gi = vmcs_read(VMCS_GUEST_INTERRUPTIBILITY); 1070 KASSERT((gi & NMI_BLOCKING) == 0, ("vmx_inject_nmi: invalid guest " 1071 "interruptibility-state %#x", gi)); 1072 1073 info = vmcs_read(VMCS_ENTRY_INTR_INFO); 1074 KASSERT((info & VMCS_INTR_VALID) == 0, ("vmx_inject_nmi: invalid " 1075 "VM-entry interruption information %#x", info)); 1076 1077 /* 1078 * Inject the virtual NMI. The vector must be the NMI IDT entry 1079 * or the VMCS entry check will fail. 1080 */ 1081 info = IDT_NMI | VMCS_INTR_T_NMI | VMCS_INTR_VALID; 1082 vmcs_write(VMCS_ENTRY_INTR_INFO, info); 1083 1084 VCPU_CTR0(vmx->vm, vcpu, "Injecting vNMI"); 1085 1086 /* Clear the request */ 1087 vm_nmi_clear(vmx->vm, vcpu); 1088} 1089 1090static void 1091vmx_inject_interrupts(struct vmx *vmx, int vcpu, struct vlapic *vlapic) 1092{ 1093 int vector, need_nmi_exiting; 1094 uint64_t rflags; 1095 uint32_t gi, info; 1096 1097 if (vm_nmi_pending(vmx->vm, vcpu)) { 1098 /* 1099 * If there are no conditions blocking NMI injection then 1100 * inject it directly here otherwise enable "NMI window 1101 * exiting" to inject it as soon as we can. 1102 * 1103 * We also check for STI_BLOCKING because some implementations 1104 * don't allow NMI injection in this case. If we are running 1105 * on a processor that doesn't have this restriction it will 1106 * immediately exit and the NMI will be injected in the 1107 * "NMI window exiting" handler. 1108 */ 1109 need_nmi_exiting = 1; 1110 gi = vmcs_read(VMCS_GUEST_INTERRUPTIBILITY); 1111 if ((gi & (HWINTR_BLOCKING | NMI_BLOCKING)) == 0) { 1112 info = vmcs_read(VMCS_ENTRY_INTR_INFO); 1113 if ((info & VMCS_INTR_VALID) == 0) { 1114 vmx_inject_nmi(vmx, vcpu); 1115 need_nmi_exiting = 0; 1116 } else { 1117 VCPU_CTR1(vmx->vm, vcpu, "Cannot inject NMI " 1118 "due to VM-entry intr info %#x", info); 1119 } 1120 } else { 1121 VCPU_CTR1(vmx->vm, vcpu, "Cannot inject NMI due to " 1122 "Guest Interruptibility-state %#x", gi); 1123 } 1124 1125 if (need_nmi_exiting) 1126 vmx_set_nmi_window_exiting(vmx, vcpu); 1127 } 1128 1129 if (virtual_interrupt_delivery) { 1130 vmx_inject_pir(vlapic); 1131 return; 1132 } 1133 1134 /* 1135 * If interrupt-window exiting is already in effect then don't bother 1136 * checking for pending interrupts. This is just an optimization and 1137 * not needed for correctness. 1138 */ 1139 if ((vmx->cap[vcpu].proc_ctls & PROCBASED_INT_WINDOW_EXITING) != 0) { 1140 VCPU_CTR0(vmx->vm, vcpu, "Skip interrupt injection due to " 1141 "pending int_window_exiting"); 1142 return; 1143 } 1144 1145 /* Ask the local apic for a vector to inject */ 1146 if (!vlapic_pending_intr(vlapic, &vector)) 1147 return; 1148 1149 KASSERT(vector >= 32 && vector <= 255, ("invalid vector %d", vector)); 1150 1151 /* Check RFLAGS.IF and the interruptibility state of the guest */ 1152 rflags = vmcs_read(VMCS_GUEST_RFLAGS); 1153 if ((rflags & PSL_I) == 0) { 1154 VCPU_CTR2(vmx->vm, vcpu, "Cannot inject vector %d due to " 1155 "rflags %#lx", vector, rflags); 1156 goto cantinject; 1157 } 1158 1159 gi = vmcs_read(VMCS_GUEST_INTERRUPTIBILITY); 1160 if (gi & HWINTR_BLOCKING) { 1161 VCPU_CTR2(vmx->vm, vcpu, "Cannot inject vector %d due to " 1162 "Guest Interruptibility-state %#x", vector, gi); 1163 goto cantinject; 1164 } 1165 1166 info = vmcs_read(VMCS_ENTRY_INTR_INFO); 1167 if (info & VMCS_INTR_VALID) { 1168 /* 1169 * This is expected and could happen for multiple reasons: 1170 * - A vectoring VM-entry was aborted due to astpending 1171 * - A VM-exit happened during event injection. 1172 * - An NMI was injected above or after "NMI window exiting" 1173 */ 1174 VCPU_CTR2(vmx->vm, vcpu, "Cannot inject vector %d due to " 1175 "VM-entry intr info %#x", vector, info); 1176 goto cantinject; 1177 } 1178 1179 /* Inject the interrupt */ 1180 info = VMCS_INTR_T_HWINTR | VMCS_INTR_VALID; 1181 info |= vector; 1182 vmcs_write(VMCS_ENTRY_INTR_INFO, info); 1183 1184 /* Update the Local APIC ISR */ 1185 vlapic_intr_accepted(vlapic, vector); 1186 1187 VCPU_CTR1(vmx->vm, vcpu, "Injecting hwintr at vector %d", vector); 1188 1189 return; 1190 1191cantinject: 1192 /* 1193 * Set the Interrupt Window Exiting execution control so we can inject 1194 * the interrupt as soon as blocking condition goes away. 1195 */ 1196 vmx_set_int_window_exiting(vmx, vcpu); 1197} 1198 1199/* 1200 * If the Virtual NMIs execution control is '1' then the logical processor 1201 * tracks virtual-NMI blocking in the Guest Interruptibility-state field of 1202 * the VMCS. An IRET instruction in VMX non-root operation will remove any 1203 * virtual-NMI blocking. 1204 * 1205 * This unblocking occurs even if the IRET causes a fault. In this case the 1206 * hypervisor needs to restore virtual-NMI blocking before resuming the guest. 1207 */ 1208static void 1209vmx_restore_nmi_blocking(struct vmx *vmx, int vcpuid) 1210{ 1211 uint32_t gi; 1212 1213 VCPU_CTR0(vmx->vm, vcpuid, "Restore Virtual-NMI blocking"); 1214 gi = vmcs_read(VMCS_GUEST_INTERRUPTIBILITY); 1215 gi |= VMCS_INTERRUPTIBILITY_NMI_BLOCKING; 1216 vmcs_write(VMCS_GUEST_INTERRUPTIBILITY, gi); 1217} 1218 1219static void 1220vmx_clear_nmi_blocking(struct vmx *vmx, int vcpuid) 1221{ 1222 uint32_t gi; 1223 1224 VCPU_CTR0(vmx->vm, vcpuid, "Clear Virtual-NMI blocking"); 1225 gi = vmcs_read(VMCS_GUEST_INTERRUPTIBILITY); 1226 gi &= ~VMCS_INTERRUPTIBILITY_NMI_BLOCKING; 1227 vmcs_write(VMCS_GUEST_INTERRUPTIBILITY, gi); 1228} 1229 1230static int 1231vmx_emulate_cr_access(struct vmx *vmx, int vcpu, uint64_t exitqual) 1232{ 1233 int cr, vmcs_guest_cr, vmcs_shadow_cr; 1234 uint64_t crval, regval, ones_mask, zeros_mask; 1235 const struct vmxctx *vmxctx; 1236 1237 /* We only handle mov to %cr0 or %cr4 at this time */ 1238 if ((exitqual & 0xf0) != 0x00) 1239 return (UNHANDLED); 1240 1241 cr = exitqual & 0xf; 1242 if (cr != 0 && cr != 4) 1243 return (UNHANDLED); 1244 1245 vmxctx = &vmx->ctx[vcpu]; 1246 1247 /* 1248 * We must use vmcs_write() directly here because vmcs_setreg() will 1249 * call vmclear(vmcs) as a side-effect which we certainly don't want. 1250 */ 1251 switch ((exitqual >> 8) & 0xf) { 1252 case 0: 1253 regval = vmxctx->guest_rax; 1254 break; 1255 case 1: 1256 regval = vmxctx->guest_rcx; 1257 break; 1258 case 2: 1259 regval = vmxctx->guest_rdx; 1260 break; 1261 case 3: 1262 regval = vmxctx->guest_rbx; 1263 break; 1264 case 4: 1265 regval = vmcs_read(VMCS_GUEST_RSP); 1266 break; 1267 case 5: 1268 regval = vmxctx->guest_rbp; 1269 break; 1270 case 6: 1271 regval = vmxctx->guest_rsi; 1272 break; 1273 case 7: 1274 regval = vmxctx->guest_rdi; 1275 break; 1276 case 8: 1277 regval = vmxctx->guest_r8; 1278 break; 1279 case 9: 1280 regval = vmxctx->guest_r9; 1281 break; 1282 case 10: 1283 regval = vmxctx->guest_r10; 1284 break; 1285 case 11: 1286 regval = vmxctx->guest_r11; 1287 break; 1288 case 12: 1289 regval = vmxctx->guest_r12; 1290 break; 1291 case 13: 1292 regval = vmxctx->guest_r13; 1293 break; 1294 case 14: 1295 regval = vmxctx->guest_r14; 1296 break; 1297 case 15: 1298 regval = vmxctx->guest_r15; 1299 break; 1300 } 1301 1302 if (cr == 0) { 1303 ones_mask = cr0_ones_mask; 1304 zeros_mask = cr0_zeros_mask; 1305 vmcs_guest_cr = VMCS_GUEST_CR0; 1306 vmcs_shadow_cr = VMCS_CR0_SHADOW; 1307 } else { 1308 ones_mask = cr4_ones_mask; 1309 zeros_mask = cr4_zeros_mask; 1310 vmcs_guest_cr = VMCS_GUEST_CR4; 1311 vmcs_shadow_cr = VMCS_CR4_SHADOW; 1312 } 1313 vmcs_write(vmcs_shadow_cr, regval); 1314 1315 crval = regval | ones_mask; 1316 crval &= ~zeros_mask; 1317 vmcs_write(vmcs_guest_cr, crval); 1318 1319 if (cr == 0 && regval & CR0_PG) { 1320 uint64_t efer, entry_ctls; 1321 1322 /* 1323 * If CR0.PG is 1 and EFER.LME is 1 then EFER.LMA and 1324 * the "IA-32e mode guest" bit in VM-entry control must be 1325 * equal. 1326 */ 1327 efer = vmcs_read(VMCS_GUEST_IA32_EFER); 1328 if (efer & EFER_LME) { 1329 efer |= EFER_LMA; 1330 vmcs_write(VMCS_GUEST_IA32_EFER, efer); 1331 entry_ctls = vmcs_read(VMCS_ENTRY_CTLS); 1332 entry_ctls |= VM_ENTRY_GUEST_LMA; 1333 vmcs_write(VMCS_ENTRY_CTLS, entry_ctls); 1334 } 1335 } 1336 1337 return (HANDLED); 1338} 1339 1340static int 1341ept_fault_type(uint64_t ept_qual) 1342{ 1343 int fault_type; 1344 1345 if (ept_qual & EPT_VIOLATION_DATA_WRITE) 1346 fault_type = VM_PROT_WRITE; 1347 else if (ept_qual & EPT_VIOLATION_INST_FETCH) 1348 fault_type = VM_PROT_EXECUTE; 1349 else 1350 fault_type= VM_PROT_READ; 1351 1352 return (fault_type); 1353} 1354 1355static boolean_t 1356ept_emulation_fault(uint64_t ept_qual) 1357{ 1358 int read, write; 1359 1360 /* EPT fault on an instruction fetch doesn't make sense here */ 1361 if (ept_qual & EPT_VIOLATION_INST_FETCH) 1362 return (FALSE); 1363 1364 /* EPT fault must be a read fault or a write fault */ 1365 read = ept_qual & EPT_VIOLATION_DATA_READ ? 1 : 0; 1366 write = ept_qual & EPT_VIOLATION_DATA_WRITE ? 1 : 0; 1367 if ((read | write) == 0) 1368 return (FALSE); 1369 1370 /* 1371 * The EPT violation must have been caused by accessing a 1372 * guest-physical address that is a translation of a guest-linear 1373 * address. 1374 */ 1375 if ((ept_qual & EPT_VIOLATION_GLA_VALID) == 0 || 1376 (ept_qual & EPT_VIOLATION_XLAT_VALID) == 0) { 1377 return (FALSE); 1378 } 1379 1380 return (TRUE); 1381} 1382 1383static int 1384vmx_handle_apic_write(struct vlapic *vlapic, uint64_t qual) 1385{ 1386 int error, handled, offset; 1387 bool retu; 1388 1389 if (!virtual_interrupt_delivery) 1390 return (UNHANDLED); 1391 1392 handled = 1; 1393 offset = APIC_WRITE_OFFSET(qual); 1394 switch (offset) { 1395 case APIC_OFFSET_ID: 1396 vlapic_id_write_handler(vlapic); 1397 break; 1398 case APIC_OFFSET_LDR: 1399 vlapic_ldr_write_handler(vlapic); 1400 break; 1401 case APIC_OFFSET_DFR: 1402 vlapic_dfr_write_handler(vlapic); 1403 break; 1404 case APIC_OFFSET_SVR: 1405 vlapic_svr_write_handler(vlapic); 1406 break; 1407 case APIC_OFFSET_ESR: 1408 vlapic_esr_write_handler(vlapic); 1409 break; 1410 case APIC_OFFSET_ICR_LOW: 1411 retu = false; 1412 error = vlapic_icrlo_write_handler(vlapic, &retu); 1413 if (error != 0 || retu) 1414 handled = 0; 1415 break; 1416 case APIC_OFFSET_CMCI_LVT: 1417 case APIC_OFFSET_TIMER_LVT ... APIC_OFFSET_ERROR_LVT: 1418 vlapic_lvt_write_handler(vlapic, offset); 1419 break; 1420 case APIC_OFFSET_TIMER_ICR: 1421 vlapic_icrtmr_write_handler(vlapic); 1422 break; 1423 case APIC_OFFSET_TIMER_DCR: 1424 vlapic_dcr_write_handler(vlapic); 1425 break; 1426 default: 1427 handled = 0; 1428 break; 1429 } 1430 return (handled); 1431} 1432 1433static bool 1434apic_access_fault(uint64_t gpa) 1435{ 1436 1437 if (virtual_interrupt_delivery && 1438 (gpa >= DEFAULT_APIC_BASE && gpa < DEFAULT_APIC_BASE + PAGE_SIZE)) 1439 return (true); 1440 else 1441 return (false); 1442} 1443 1444static int 1445vmx_handle_apic_access(struct vmx *vmx, int vcpuid, struct vm_exit *vmexit) 1446{ 1447 uint64_t qual; 1448 int access_type, offset, allowed; 1449 1450 if (!virtual_interrupt_delivery) 1451 return (UNHANDLED); 1452 1453 qual = vmexit->u.vmx.exit_qualification; 1454 access_type = APIC_ACCESS_TYPE(qual); 1455 offset = APIC_ACCESS_OFFSET(qual); 1456 1457 allowed = 0; 1458 if (access_type == 0) { 1459 /* 1460 * Read data access to the following registers is expected. 1461 */ 1462 switch (offset) { 1463 case APIC_OFFSET_APR: 1464 case APIC_OFFSET_PPR: 1465 case APIC_OFFSET_RRR: 1466 case APIC_OFFSET_CMCI_LVT: 1467 case APIC_OFFSET_TIMER_CCR: 1468 allowed = 1; 1469 break; 1470 default: 1471 break; 1472 } 1473 } else if (access_type == 1) { 1474 /* 1475 * Write data access to the following registers is expected. 1476 */ 1477 switch (offset) { 1478 case APIC_OFFSET_VER: 1479 case APIC_OFFSET_APR: 1480 case APIC_OFFSET_PPR: 1481 case APIC_OFFSET_RRR: 1482 case APIC_OFFSET_ISR0 ... APIC_OFFSET_ISR7: 1483 case APIC_OFFSET_TMR0 ... APIC_OFFSET_TMR7: 1484 case APIC_OFFSET_IRR0 ... APIC_OFFSET_IRR7: 1485 case APIC_OFFSET_CMCI_LVT: 1486 case APIC_OFFSET_TIMER_CCR: 1487 allowed = 1; 1488 break; 1489 default: 1490 break; 1491 } 1492 } 1493 1494 if (allowed) { 1495 vmexit->exitcode = VM_EXITCODE_INST_EMUL; 1496 vmexit->u.inst_emul.gpa = DEFAULT_APIC_BASE + offset; 1497 vmexit->u.inst_emul.gla = VIE_INVALID_GLA; 1498 vmexit->u.inst_emul.cr3 = vmcs_guest_cr3(); 1499 } 1500 1501 /* 1502 * Regardless of whether the APIC-access is allowed this handler 1503 * always returns UNHANDLED: 1504 * - if the access is allowed then it is handled by emulating the 1505 * instruction that caused the VM-exit (outside the critical section) 1506 * - if the access is not allowed then it will be converted to an 1507 * exitcode of VM_EXITCODE_VMX and will be dealt with in userland. 1508 */ 1509 return (UNHANDLED); 1510} 1511 1512static int 1513vmx_exit_process(struct vmx *vmx, int vcpu, struct vm_exit *vmexit) 1514{ 1515 int error, handled; 1516 struct vmxctx *vmxctx; 1517 struct vlapic *vlapic; 1518 uint32_t eax, ecx, edx, idtvec_info, idtvec_err, intr_info, reason; 1519 uint64_t qual, gpa; 1520 bool retu; 1521 1522 CTASSERT((PINBASED_CTLS_ONE_SETTING & PINBASED_VIRTUAL_NMI) != 0); 1523 CTASSERT((PINBASED_CTLS_ONE_SETTING & PINBASED_NMI_EXITING) != 0); 1524 1525 handled = 0; 1526 vmxctx = &vmx->ctx[vcpu]; 1527 1528 qual = vmexit->u.vmx.exit_qualification; 1529 reason = vmexit->u.vmx.exit_reason; 1530 vmexit->exitcode = VM_EXITCODE_BOGUS; 1531 1532 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_COUNT, 1); 1533 1534 /* 1535 * VM exits that could be triggered during event injection on the 1536 * previous VM entry need to be handled specially by re-injecting 1537 * the event. 1538 * 1539 * See "Information for VM Exits During Event Delivery" in Intel SDM 1540 * for details. 1541 */ 1542 switch (reason) { 1543 case EXIT_REASON_EPT_FAULT: 1544 case EXIT_REASON_EPT_MISCONFIG: 1545 case EXIT_REASON_APIC_ACCESS: 1546 case EXIT_REASON_TASK_SWITCH: 1547 case EXIT_REASON_EXCEPTION: 1548 idtvec_info = vmcs_idt_vectoring_info(); 1549 if (idtvec_info & VMCS_IDT_VEC_VALID) { 1550 idtvec_info &= ~(1 << 12); /* clear undefined bit */ 1551 vmcs_write(VMCS_ENTRY_INTR_INFO, idtvec_info); 1552 if (idtvec_info & VMCS_IDT_VEC_ERRCODE_VALID) { 1553 idtvec_err = vmcs_idt_vectoring_err(); 1554 vmcs_write(VMCS_ENTRY_EXCEPTION_ERROR, 1555 idtvec_err); 1556 } 1557 /* 1558 * If 'virtual NMIs' are being used and the VM-exit 1559 * happened while injecting an NMI during the previous 1560 * VM-entry, then clear "blocking by NMI" in the Guest 1561 * Interruptibility-state. 1562 */ 1563 if ((idtvec_info & VMCS_INTR_T_MASK) == 1564 VMCS_INTR_T_NMI) { 1565 vmx_clear_nmi_blocking(vmx, vcpu); 1566 } 1567 vmcs_write(VMCS_ENTRY_INST_LENGTH, vmexit->inst_length); 1568 } 1569 default: 1570 idtvec_info = 0; 1571 break; 1572 } 1573 1574 switch (reason) { 1575 case EXIT_REASON_CR_ACCESS: 1576 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_CR_ACCESS, 1); 1577 handled = vmx_emulate_cr_access(vmx, vcpu, qual); 1578 break; 1579 case EXIT_REASON_RDMSR: 1580 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_RDMSR, 1); 1581 retu = false; 1582 ecx = vmxctx->guest_rcx; 1583 error = emulate_rdmsr(vmx->vm, vcpu, ecx, &retu); 1584 if (error) { 1585 vmexit->exitcode = VM_EXITCODE_RDMSR; 1586 vmexit->u.msr.code = ecx; 1587 } else if (!retu) { 1588 handled = 1; 1589 } else { 1590 /* Return to userspace with a valid exitcode */ 1591 KASSERT(vmexit->exitcode != VM_EXITCODE_BOGUS, 1592 ("emulate_wrmsr retu with bogus exitcode")); 1593 } 1594 break; 1595 case EXIT_REASON_WRMSR: 1596 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_WRMSR, 1); 1597 retu = false; 1598 eax = vmxctx->guest_rax; 1599 ecx = vmxctx->guest_rcx; 1600 edx = vmxctx->guest_rdx; 1601 error = emulate_wrmsr(vmx->vm, vcpu, ecx, 1602 (uint64_t)edx << 32 | eax, &retu); 1603 if (error) { 1604 vmexit->exitcode = VM_EXITCODE_WRMSR; 1605 vmexit->u.msr.code = ecx; 1606 vmexit->u.msr.wval = (uint64_t)edx << 32 | eax; 1607 } else if (!retu) { 1608 handled = 1; 1609 } else { 1610 /* Return to userspace with a valid exitcode */ 1611 KASSERT(vmexit->exitcode != VM_EXITCODE_BOGUS, 1612 ("emulate_wrmsr retu with bogus exitcode")); 1613 } 1614 break; 1615 case EXIT_REASON_HLT: 1616 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_HLT, 1); 1617 vmexit->exitcode = VM_EXITCODE_HLT; 1618 vmexit->u.hlt.rflags = vmcs_read(VMCS_GUEST_RFLAGS); 1619 break; 1620 case EXIT_REASON_MTF: 1621 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_MTRAP, 1); 1622 vmexit->exitcode = VM_EXITCODE_MTRAP; 1623 break; 1624 case EXIT_REASON_PAUSE: 1625 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_PAUSE, 1); 1626 vmexit->exitcode = VM_EXITCODE_PAUSE; 1627 break; 1628 case EXIT_REASON_INTR_WINDOW: 1629 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_INTR_WINDOW, 1); 1630 vmx_clear_int_window_exiting(vmx, vcpu); 1631 return (1); 1632 case EXIT_REASON_EXT_INTR: 1633 /* 1634 * External interrupts serve only to cause VM exits and allow 1635 * the host interrupt handler to run. 1636 * 1637 * If this external interrupt triggers a virtual interrupt 1638 * to a VM, then that state will be recorded by the 1639 * host interrupt handler in the VM's softc. We will inject 1640 * this virtual interrupt during the subsequent VM enter. 1641 */ 1642 intr_info = vmcs_read(VMCS_EXIT_INTR_INFO); 1643 KASSERT((intr_info & VMCS_INTR_VALID) != 0 && 1644 (intr_info & VMCS_INTR_T_MASK) == VMCS_INTR_T_HWINTR, 1645 ("VM exit interruption info invalid: %#x", intr_info)); 1646 vmx_trigger_hostintr(intr_info & 0xff); 1647 1648 /* 1649 * This is special. We want to treat this as an 'handled' 1650 * VM-exit but not increment the instruction pointer. 1651 */ 1652 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_EXTINT, 1); 1653 return (1); 1654 case EXIT_REASON_NMI_WINDOW: 1655 /* Exit to allow the pending virtual NMI to be injected */ 1656 if (vm_nmi_pending(vmx->vm, vcpu)) 1657 vmx_inject_nmi(vmx, vcpu); 1658 vmx_clear_nmi_window_exiting(vmx, vcpu); 1659 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_NMI_WINDOW, 1); 1660 return (1); 1661 case EXIT_REASON_INOUT: 1662 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_INOUT, 1); 1663 vmexit->exitcode = VM_EXITCODE_INOUT; 1664 vmexit->u.inout.bytes = (qual & 0x7) + 1; 1665 vmexit->u.inout.in = (qual & 0x8) ? 1 : 0; 1666 vmexit->u.inout.string = (qual & 0x10) ? 1 : 0; 1667 vmexit->u.inout.rep = (qual & 0x20) ? 1 : 0; 1668 vmexit->u.inout.port = (uint16_t)(qual >> 16); 1669 vmexit->u.inout.eax = (uint32_t)(vmxctx->guest_rax); 1670 break; 1671 case EXIT_REASON_CPUID: 1672 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_CPUID, 1); 1673 handled = vmx_handle_cpuid(vmx->vm, vcpu, vmxctx); 1674 break; 1675 case EXIT_REASON_EXCEPTION: 1676 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_EXCEPTION, 1); 1677 intr_info = vmcs_read(VMCS_EXIT_INTR_INFO); 1678 KASSERT((intr_info & VMCS_INTR_VALID) != 0, 1679 ("VM exit interruption info invalid: %#x", intr_info)); 1680 1681 /* 1682 * If Virtual NMIs control is 1 and the VM-exit is due to a 1683 * fault encountered during the execution of IRET then we must 1684 * restore the state of "virtual-NMI blocking" before resuming 1685 * the guest. 1686 * 1687 * See "Resuming Guest Software after Handling an Exception". 1688 */ 1689 if ((idtvec_info & VMCS_IDT_VEC_VALID) == 0 && 1690 (intr_info & 0xff) != IDT_DF && 1691 (intr_info & EXIT_QUAL_NMIUDTI) != 0) 1692 vmx_restore_nmi_blocking(vmx, vcpu); 1693 1694 /* 1695 * The NMI has already been handled in vmx_exit_handle_nmi(). 1696 */ 1697 if ((intr_info & VMCS_INTR_T_MASK) == VMCS_INTR_T_NMI) 1698 return (1); 1699 break; 1700 case EXIT_REASON_EPT_FAULT: 1701 /* 1702 * If 'gpa' lies within the address space allocated to 1703 * memory then this must be a nested page fault otherwise 1704 * this must be an instruction that accesses MMIO space. 1705 */ 1706 gpa = vmcs_gpa(); 1707 if (vm_mem_allocated(vmx->vm, gpa) || apic_access_fault(gpa)) { 1708 vmexit->exitcode = VM_EXITCODE_PAGING; 1709 vmexit->u.paging.gpa = gpa; 1710 vmexit->u.paging.fault_type = ept_fault_type(qual); 1711 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_NESTED_FAULT, 1); 1712 } else if (ept_emulation_fault(qual)) { 1713 vmexit->exitcode = VM_EXITCODE_INST_EMUL; 1714 vmexit->u.inst_emul.gpa = gpa; 1715 vmexit->u.inst_emul.gla = vmcs_gla(); 1716 vmexit->u.inst_emul.cr3 = vmcs_guest_cr3(); 1717 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_INST_EMUL, 1); 1718 } 1719 /* 1720 * If Virtual NMIs control is 1 and the VM-exit is due to an 1721 * EPT fault during the execution of IRET then we must restore 1722 * the state of "virtual-NMI blocking" before resuming. 1723 * 1724 * See description of "NMI unblocking due to IRET" in 1725 * "Exit Qualification for EPT Violations". 1726 */ 1727 if ((idtvec_info & VMCS_IDT_VEC_VALID) == 0 && 1728 (qual & EXIT_QUAL_NMIUDTI) != 0) 1729 vmx_restore_nmi_blocking(vmx, vcpu); 1730 break; 1731 case EXIT_REASON_VIRTUALIZED_EOI: 1732 vmexit->exitcode = VM_EXITCODE_IOAPIC_EOI; 1733 vmexit->u.ioapic_eoi.vector = qual & 0xFF; 1734 vmexit->inst_length = 0; /* trap-like */ 1735 break; 1736 case EXIT_REASON_APIC_ACCESS: 1737 handled = vmx_handle_apic_access(vmx, vcpu, vmexit); 1738 break; 1739 case EXIT_REASON_APIC_WRITE: 1740 /* 1741 * APIC-write VM exit is trap-like so the %rip is already 1742 * pointing to the next instruction. 1743 */ 1744 vmexit->inst_length = 0; 1745 vlapic = vm_lapic(vmx->vm, vcpu); 1746 handled = vmx_handle_apic_write(vlapic, qual); 1747 break; 1748 default: 1749 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_UNKNOWN, 1); 1750 break; 1751 } 1752 1753 if (handled) { 1754 /* 1755 * It is possible that control is returned to userland 1756 * even though we were able to handle the VM exit in the 1757 * kernel. 1758 * 1759 * In such a case we want to make sure that the userland 1760 * restarts guest execution at the instruction *after* 1761 * the one we just processed. Therefore we update the 1762 * guest rip in the VMCS and in 'vmexit'. 1763 */ 1764 vmexit->rip += vmexit->inst_length; 1765 vmexit->inst_length = 0; 1766 vmcs_write(VMCS_GUEST_RIP, vmexit->rip); 1767 } else { 1768 if (vmexit->exitcode == VM_EXITCODE_BOGUS) { 1769 /* 1770 * If this VM exit was not claimed by anybody then 1771 * treat it as a generic VMX exit. 1772 */ 1773 vmexit->exitcode = VM_EXITCODE_VMX; 1774 vmexit->u.vmx.status = VM_SUCCESS; 1775 vmexit->u.vmx.inst_type = 0; 1776 vmexit->u.vmx.inst_error = 0; 1777 } else { 1778 /* 1779 * The exitcode and collateral have been populated. 1780 * The VM exit will be processed further in userland. 1781 */ 1782 } 1783 } 1784 return (handled); 1785} 1786 1787static __inline int 1788vmx_exit_astpending(struct vmx *vmx, int vcpu, struct vm_exit *vmexit) 1789{ 1790 1791 vmexit->rip = vmcs_guest_rip(); 1792 vmexit->inst_length = 0; 1793 vmexit->exitcode = VM_EXITCODE_BOGUS; 1794 vmx_astpending_trace(vmx, vcpu, vmexit->rip); 1795 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_ASTPENDING, 1); 1796 1797 return (HANDLED); 1798} 1799 1800static __inline int 1801vmx_exit_rendezvous(struct vmx *vmx, int vcpu, struct vm_exit *vmexit) 1802{ 1803 1804 vmexit->rip = vmcs_guest_rip(); 1805 vmexit->inst_length = 0; 1806 vmexit->exitcode = VM_EXITCODE_RENDEZVOUS; 1807 vmm_stat_incr(vmx->vm, vcpu, VMEXIT_RENDEZVOUS, 1); 1808 1809 return (UNHANDLED); 1810} 1811 1812static __inline int 1813vmx_exit_inst_error(struct vmxctx *vmxctx, int rc, struct vm_exit *vmexit) 1814{ 1815 1816 KASSERT(vmxctx->inst_fail_status != VM_SUCCESS, 1817 ("vmx_exit_inst_error: invalid inst_fail_status %d", 1818 vmxctx->inst_fail_status)); 1819 1820 vmexit->inst_length = 0; 1821 vmexit->exitcode = VM_EXITCODE_VMX; 1822 vmexit->u.vmx.status = vmxctx->inst_fail_status; 1823 vmexit->u.vmx.inst_error = vmcs_instruction_error(); 1824 vmexit->u.vmx.exit_reason = ~0; 1825 vmexit->u.vmx.exit_qualification = ~0; 1826 1827 switch (rc) { 1828 case VMX_VMRESUME_ERROR: 1829 case VMX_VMLAUNCH_ERROR: 1830 case VMX_INVEPT_ERROR: 1831 vmexit->u.vmx.inst_type = rc; 1832 break; 1833 default: 1834 panic("vm_exit_inst_error: vmx_enter_guest returned %d", rc); 1835 } 1836 1837 return (UNHANDLED); 1838} 1839 1840/* 1841 * If the NMI-exiting VM execution control is set to '1' then an NMI in 1842 * non-root operation causes a VM-exit. NMI blocking is in effect so it is 1843 * sufficient to simply vector to the NMI handler via a software interrupt. 1844 * However, this must be done before maskable interrupts are enabled 1845 * otherwise the "iret" issued by an interrupt handler will incorrectly 1846 * clear NMI blocking. 1847 */ 1848static __inline void 1849vmx_exit_handle_nmi(struct vmx *vmx, int vcpuid, struct vm_exit *vmexit) 1850{ 1851 uint32_t intr_info; 1852 1853 KASSERT((read_rflags() & PSL_I) == 0, ("interrupts enabled")); 1854 1855 if (vmexit->u.vmx.exit_reason != EXIT_REASON_EXCEPTION) 1856 return; 1857 1858 intr_info = vmcs_read(VMCS_EXIT_INTR_INFO); 1859 KASSERT((intr_info & VMCS_INTR_VALID) != 0, 1860 ("VM exit interruption info invalid: %#x", intr_info)); 1861 1862 if ((intr_info & VMCS_INTR_T_MASK) == VMCS_INTR_T_NMI) { 1863 KASSERT((intr_info & 0xff) == IDT_NMI, ("VM exit due " 1864 "to NMI has invalid vector: %#x", intr_info)); 1865 VCPU_CTR0(vmx->vm, vcpuid, "Vectoring to NMI handler"); 1866 __asm __volatile("int $2"); 1867 } 1868} 1869 1870static int 1871vmx_run(void *arg, int vcpu, register_t startrip, pmap_t pmap, 1872 void *rendezvous_cookie) 1873{ 1874 int rc, handled, launched; 1875 struct vmx *vmx; 1876 struct vm *vm; 1877 struct vmxctx *vmxctx; 1878 struct vmcs *vmcs; 1879 struct vm_exit *vmexit; 1880 struct vlapic *vlapic; 1881 uint64_t rip; 1882 uint32_t exit_reason; 1883 1884 vmx = arg; 1885 vm = vmx->vm; 1886 vmcs = &vmx->vmcs[vcpu]; 1887 vmxctx = &vmx->ctx[vcpu]; 1888 vlapic = vm_lapic(vm, vcpu); 1889 vmexit = vm_exitinfo(vm, vcpu); 1890 launched = 0; 1891 1892 KASSERT(vmxctx->pmap == pmap, 1893 ("pmap %p different than ctx pmap %p", pmap, vmxctx->pmap)); 1894 1895 VMPTRLD(vmcs); 1896 1897 /* 1898 * XXX 1899 * We do this every time because we may setup the virtual machine 1900 * from a different process than the one that actually runs it. 1901 * 1902 * If the life of a virtual machine was spent entirely in the context 1903 * of a single process we could do this once in vmx_vminit(). 1904 */ 1905 vmcs_write(VMCS_HOST_CR3, rcr3()); 1906 1907 vmcs_write(VMCS_GUEST_RIP, startrip); 1908 vmx_set_pcpu_defaults(vmx, vcpu, pmap); 1909 do { 1910 /* 1911 * Interrupts are disabled from this point on until the 1912 * guest starts executing. This is done for the following 1913 * reasons: 1914 * 1915 * If an AST is asserted on this thread after the check below, 1916 * then the IPI_AST notification will not be lost, because it 1917 * will cause a VM exit due to external interrupt as soon as 1918 * the guest state is loaded. 1919 * 1920 * A posted interrupt after 'vmx_inject_interrupts()' will 1921 * not be "lost" because it will be held pending in the host 1922 * APIC because interrupts are disabled. The pending interrupt 1923 * will be recognized as soon as the guest state is loaded. 1924 * 1925 * The same reasoning applies to the IPI generated by 1926 * pmap_invalidate_ept(). 1927 */ 1928 disable_intr(); 1929 if (curthread->td_flags & (TDF_ASTPENDING | TDF_NEEDRESCHED)) { 1930 enable_intr(); 1931 handled = vmx_exit_astpending(vmx, vcpu, vmexit); 1932 break; 1933 } 1934 1935 if (vcpu_rendezvous_pending(rendezvous_cookie)) { 1936 enable_intr(); 1937 handled = vmx_exit_rendezvous(vmx, vcpu, vmexit); 1938 break; 1939 } 1940 1941 vmx_inject_interrupts(vmx, vcpu, vlapic); 1942 vmx_run_trace(vmx, vcpu); 1943 rc = vmx_enter_guest(vmxctx, vmx, launched); 1944 1945 /* Collect some information for VM exit processing */ 1946 vmexit->rip = rip = vmcs_guest_rip(); 1947 vmexit->inst_length = vmexit_instruction_length(); 1948 vmexit->u.vmx.exit_reason = exit_reason = vmcs_exit_reason(); 1949 vmexit->u.vmx.exit_qualification = vmcs_exit_qualification(); 1950 1951 if (rc == VMX_GUEST_VMEXIT) { 1952 vmx_exit_handle_nmi(vmx, vcpu, vmexit); 1953 enable_intr(); 1954 handled = vmx_exit_process(vmx, vcpu, vmexit); 1955 } else { 1956 enable_intr(); 1957 handled = vmx_exit_inst_error(vmxctx, rc, vmexit); 1958 } 1959 launched = 1; 1960 vmx_exit_trace(vmx, vcpu, rip, exit_reason, handled); 1961 } while (handled); 1962 1963 /* 1964 * If a VM exit has been handled then the exitcode must be BOGUS 1965 * If a VM exit is not handled then the exitcode must not be BOGUS 1966 */ 1967 if ((handled && vmexit->exitcode != VM_EXITCODE_BOGUS) || 1968 (!handled && vmexit->exitcode == VM_EXITCODE_BOGUS)) { 1969 panic("Mismatch between handled (%d) and exitcode (%d)", 1970 handled, vmexit->exitcode); 1971 } 1972 1973 if (!handled) 1974 vmm_stat_incr(vm, vcpu, VMEXIT_USERSPACE, 1); 1975 1976 VCPU_CTR1(vm, vcpu, "returning from vmx_run: exitcode %d", 1977 vmexit->exitcode); 1978 1979 VMCLEAR(vmcs); 1980 return (0); 1981} 1982 1983static void 1984vmx_vmcleanup(void *arg) 1985{ 1986 int i, error; 1987 struct vmx *vmx = arg; 1988 1989 if (virtual_interrupt_delivery) 1990 vm_unmap_mmio(vmx->vm, DEFAULT_APIC_BASE, PAGE_SIZE); 1991 1992 for (i = 0; i < VM_MAXCPU; i++) 1993 vpid_free(vmx->state[i].vpid); 1994 1995 /* 1996 * XXXSMP we also need to clear the VMCS active on the other vcpus. 1997 */ 1998 error = vmclear(&vmx->vmcs[0]); 1999 if (error != 0) 2000 panic("vmx_vmcleanup: vmclear error %d on vcpu 0", error); 2001 2002 free(vmx, M_VMX); 2003 2004 return; 2005} 2006 2007static register_t * 2008vmxctx_regptr(struct vmxctx *vmxctx, int reg) 2009{ 2010 2011 switch (reg) { 2012 case VM_REG_GUEST_RAX: 2013 return (&vmxctx->guest_rax); 2014 case VM_REG_GUEST_RBX: 2015 return (&vmxctx->guest_rbx); 2016 case VM_REG_GUEST_RCX: 2017 return (&vmxctx->guest_rcx); 2018 case VM_REG_GUEST_RDX: 2019 return (&vmxctx->guest_rdx); 2020 case VM_REG_GUEST_RSI: 2021 return (&vmxctx->guest_rsi); 2022 case VM_REG_GUEST_RDI: 2023 return (&vmxctx->guest_rdi); 2024 case VM_REG_GUEST_RBP: 2025 return (&vmxctx->guest_rbp); 2026 case VM_REG_GUEST_R8: 2027 return (&vmxctx->guest_r8); 2028 case VM_REG_GUEST_R9: 2029 return (&vmxctx->guest_r9); 2030 case VM_REG_GUEST_R10: 2031 return (&vmxctx->guest_r10); 2032 case VM_REG_GUEST_R11: 2033 return (&vmxctx->guest_r11); 2034 case VM_REG_GUEST_R12: 2035 return (&vmxctx->guest_r12); 2036 case VM_REG_GUEST_R13: 2037 return (&vmxctx->guest_r13); 2038 case VM_REG_GUEST_R14: 2039 return (&vmxctx->guest_r14); 2040 case VM_REG_GUEST_R15: 2041 return (&vmxctx->guest_r15); 2042 default: 2043 break; 2044 } 2045 return (NULL); 2046} 2047 2048static int 2049vmxctx_getreg(struct vmxctx *vmxctx, int reg, uint64_t *retval) 2050{ 2051 register_t *regp; 2052 2053 if ((regp = vmxctx_regptr(vmxctx, reg)) != NULL) { 2054 *retval = *regp; 2055 return (0); 2056 } else 2057 return (EINVAL); 2058} 2059 2060static int 2061vmxctx_setreg(struct vmxctx *vmxctx, int reg, uint64_t val) 2062{ 2063 register_t *regp; 2064 2065 if ((regp = vmxctx_regptr(vmxctx, reg)) != NULL) { 2066 *regp = val; 2067 return (0); 2068 } else 2069 return (EINVAL); 2070} 2071 2072static int 2073vmx_shadow_reg(int reg) 2074{ 2075 int shreg; 2076 2077 shreg = -1; 2078 2079 switch (reg) { 2080 case VM_REG_GUEST_CR0: 2081 shreg = VMCS_CR0_SHADOW; 2082 break; 2083 case VM_REG_GUEST_CR4: 2084 shreg = VMCS_CR4_SHADOW; 2085 break; 2086 default: 2087 break; 2088 } 2089 2090 return (shreg); 2091} 2092 2093static int 2094vmx_getreg(void *arg, int vcpu, int reg, uint64_t *retval) 2095{ 2096 int running, hostcpu; 2097 struct vmx *vmx = arg; 2098 2099 running = vcpu_is_running(vmx->vm, vcpu, &hostcpu); 2100 if (running && hostcpu != curcpu) 2101 panic("vmx_getreg: %s%d is running", vm_name(vmx->vm), vcpu); 2102 2103 if (vmxctx_getreg(&vmx->ctx[vcpu], reg, retval) == 0) 2104 return (0); 2105 2106 return (vmcs_getreg(&vmx->vmcs[vcpu], running, reg, retval)); 2107} 2108 2109static int 2110vmx_setreg(void *arg, int vcpu, int reg, uint64_t val) 2111{ 2112 int error, hostcpu, running, shadow; 2113 uint64_t ctls; 2114 struct vmx *vmx = arg; 2115 2116 running = vcpu_is_running(vmx->vm, vcpu, &hostcpu); 2117 if (running && hostcpu != curcpu) 2118 panic("vmx_setreg: %s%d is running", vm_name(vmx->vm), vcpu); 2119 2120 if (vmxctx_setreg(&vmx->ctx[vcpu], reg, val) == 0) 2121 return (0); 2122 2123 error = vmcs_setreg(&vmx->vmcs[vcpu], running, reg, val); 2124 2125 if (error == 0) { 2126 /* 2127 * If the "load EFER" VM-entry control is 1 then the 2128 * value of EFER.LMA must be identical to "IA-32e mode guest" 2129 * bit in the VM-entry control. 2130 */ 2131 if ((entry_ctls & VM_ENTRY_LOAD_EFER) != 0 && 2132 (reg == VM_REG_GUEST_EFER)) { 2133 vmcs_getreg(&vmx->vmcs[vcpu], running, 2134 VMCS_IDENT(VMCS_ENTRY_CTLS), &ctls); 2135 if (val & EFER_LMA) 2136 ctls |= VM_ENTRY_GUEST_LMA; 2137 else 2138 ctls &= ~VM_ENTRY_GUEST_LMA; 2139 vmcs_setreg(&vmx->vmcs[vcpu], running, 2140 VMCS_IDENT(VMCS_ENTRY_CTLS), ctls); 2141 } 2142 2143 shadow = vmx_shadow_reg(reg); 2144 if (shadow > 0) { 2145 /* 2146 * Store the unmodified value in the shadow 2147 */ 2148 error = vmcs_setreg(&vmx->vmcs[vcpu], running, 2149 VMCS_IDENT(shadow), val); 2150 } 2151 } 2152 2153 return (error); 2154} 2155 2156static int 2157vmx_getdesc(void *arg, int vcpu, int reg, struct seg_desc *desc) 2158{ 2159 struct vmx *vmx = arg; 2160 2161 return (vmcs_getdesc(&vmx->vmcs[vcpu], reg, desc)); 2162} 2163 2164static int 2165vmx_setdesc(void *arg, int vcpu, int reg, struct seg_desc *desc) 2166{ 2167 struct vmx *vmx = arg; 2168 2169 return (vmcs_setdesc(&vmx->vmcs[vcpu], reg, desc)); 2170} 2171 2172static int 2173vmx_inject(void *arg, int vcpu, int type, int vector, uint32_t code, 2174 int code_valid) 2175{ 2176 int error; 2177 uint64_t info; 2178 struct vmx *vmx = arg; 2179 struct vmcs *vmcs = &vmx->vmcs[vcpu]; 2180 2181 static uint32_t type_map[VM_EVENT_MAX] = { 2182 0x1, /* VM_EVENT_NONE */ 2183 0x0, /* VM_HW_INTR */ 2184 0x2, /* VM_NMI */ 2185 0x3, /* VM_HW_EXCEPTION */ 2186 0x4, /* VM_SW_INTR */ 2187 0x5, /* VM_PRIV_SW_EXCEPTION */ 2188 0x6, /* VM_SW_EXCEPTION */ 2189 }; 2190 2191 /* 2192 * If there is already an exception pending to be delivered to the 2193 * vcpu then just return. 2194 */ 2195 error = vmcs_getreg(vmcs, 0, VMCS_IDENT(VMCS_ENTRY_INTR_INFO), &info); 2196 if (error) 2197 return (error); 2198 2199 if (info & VMCS_INTR_VALID) 2200 return (EAGAIN); 2201 2202 info = vector | (type_map[type] << 8) | (code_valid ? 1 << 11 : 0); 2203 info |= VMCS_INTR_VALID; 2204 error = vmcs_setreg(vmcs, 0, VMCS_IDENT(VMCS_ENTRY_INTR_INFO), info); 2205 if (error != 0) 2206 return (error); 2207 2208 if (code_valid) { 2209 error = vmcs_setreg(vmcs, 0, 2210 VMCS_IDENT(VMCS_ENTRY_EXCEPTION_ERROR), 2211 code); 2212 } 2213 return (error); 2214} 2215 2216static int 2217vmx_getcap(void *arg, int vcpu, int type, int *retval) 2218{ 2219 struct vmx *vmx = arg; 2220 int vcap; 2221 int ret; 2222 2223 ret = ENOENT; 2224 2225 vcap = vmx->cap[vcpu].set; 2226 2227 switch (type) { 2228 case VM_CAP_HALT_EXIT: 2229 if (cap_halt_exit) 2230 ret = 0; 2231 break; 2232 case VM_CAP_PAUSE_EXIT: 2233 if (cap_pause_exit) 2234 ret = 0; 2235 break; 2236 case VM_CAP_MTRAP_EXIT: 2237 if (cap_monitor_trap) 2238 ret = 0; 2239 break; 2240 case VM_CAP_UNRESTRICTED_GUEST: 2241 if (cap_unrestricted_guest) 2242 ret = 0; 2243 break; 2244 case VM_CAP_ENABLE_INVPCID: 2245 if (cap_invpcid) 2246 ret = 0; 2247 break; 2248 default: 2249 break; 2250 } 2251 2252 if (ret == 0) 2253 *retval = (vcap & (1 << type)) ? 1 : 0; 2254 2255 return (ret); 2256} 2257 2258static int 2259vmx_setcap(void *arg, int vcpu, int type, int val) 2260{ 2261 struct vmx *vmx = arg; 2262 struct vmcs *vmcs = &vmx->vmcs[vcpu]; 2263 uint32_t baseval; 2264 uint32_t *pptr; 2265 int error; 2266 int flag; 2267 int reg; 2268 int retval; 2269 2270 retval = ENOENT; 2271 pptr = NULL; 2272 2273 switch (type) { 2274 case VM_CAP_HALT_EXIT: 2275 if (cap_halt_exit) { 2276 retval = 0; 2277 pptr = &vmx->cap[vcpu].proc_ctls; 2278 baseval = *pptr; 2279 flag = PROCBASED_HLT_EXITING; 2280 reg = VMCS_PRI_PROC_BASED_CTLS; 2281 } 2282 break; 2283 case VM_CAP_MTRAP_EXIT: 2284 if (cap_monitor_trap) { 2285 retval = 0; 2286 pptr = &vmx->cap[vcpu].proc_ctls; 2287 baseval = *pptr; 2288 flag = PROCBASED_MTF; 2289 reg = VMCS_PRI_PROC_BASED_CTLS; 2290 } 2291 break; 2292 case VM_CAP_PAUSE_EXIT: 2293 if (cap_pause_exit) { 2294 retval = 0; 2295 pptr = &vmx->cap[vcpu].proc_ctls; 2296 baseval = *pptr; 2297 flag = PROCBASED_PAUSE_EXITING; 2298 reg = VMCS_PRI_PROC_BASED_CTLS; 2299 } 2300 break; 2301 case VM_CAP_UNRESTRICTED_GUEST: 2302 if (cap_unrestricted_guest) { 2303 retval = 0; 2304 pptr = &vmx->cap[vcpu].proc_ctls2; 2305 baseval = *pptr; 2306 flag = PROCBASED2_UNRESTRICTED_GUEST; 2307 reg = VMCS_SEC_PROC_BASED_CTLS; 2308 } 2309 break; 2310 case VM_CAP_ENABLE_INVPCID: 2311 if (cap_invpcid) { 2312 retval = 0; 2313 pptr = &vmx->cap[vcpu].proc_ctls2; 2314 baseval = *pptr; 2315 flag = PROCBASED2_ENABLE_INVPCID; 2316 reg = VMCS_SEC_PROC_BASED_CTLS; 2317 } 2318 break; 2319 default: 2320 break; 2321 } 2322 2323 if (retval == 0) { 2324 if (val) { 2325 baseval |= flag; 2326 } else { 2327 baseval &= ~flag; 2328 } 2329 VMPTRLD(vmcs); 2330 error = vmwrite(reg, baseval); 2331 VMCLEAR(vmcs); 2332 2333 if (error) { 2334 retval = error; 2335 } else { 2336 /* 2337 * Update optional stored flags, and record 2338 * setting 2339 */ 2340 if (pptr != NULL) { 2341 *pptr = baseval; 2342 } 2343 2344 if (val) { 2345 vmx->cap[vcpu].set |= (1 << type); 2346 } else { 2347 vmx->cap[vcpu].set &= ~(1 << type); 2348 } 2349 } 2350 } 2351 2352 return (retval); 2353} 2354 2355struct vlapic_vtx { 2356 struct vlapic vlapic; 2357 struct pir_desc *pir_desc; 2358 struct vmx *vmx; 2359}; 2360 2361#define VMX_CTR_PIR(vm, vcpuid, pir_desc, notify, vector, level, msg) \ 2362do { \ 2363 VCPU_CTR2(vm, vcpuid, msg " assert %s-triggered vector %d", \ 2364 level ? "level" : "edge", vector); \ 2365 VCPU_CTR1(vm, vcpuid, msg " pir0 0x%016lx", pir_desc->pir[0]); \ 2366 VCPU_CTR1(vm, vcpuid, msg " pir1 0x%016lx", pir_desc->pir[1]); \ 2367 VCPU_CTR1(vm, vcpuid, msg " pir2 0x%016lx", pir_desc->pir[2]); \ 2368 VCPU_CTR1(vm, vcpuid, msg " pir3 0x%016lx", pir_desc->pir[3]); \ 2369 VCPU_CTR1(vm, vcpuid, msg " notify: %s", notify ? "yes" : "no");\ 2370} while (0) 2371 2372/* 2373 * vlapic->ops handlers that utilize the APICv hardware assist described in 2374 * Chapter 29 of the Intel SDM. 2375 */ 2376static int 2377vmx_set_intr_ready(struct vlapic *vlapic, int vector, bool level) 2378{ 2379 struct vlapic_vtx *vlapic_vtx; 2380 struct pir_desc *pir_desc; 2381 uint64_t mask; 2382 int idx, notify; 2383 2384 vlapic_vtx = (struct vlapic_vtx *)vlapic; 2385 pir_desc = vlapic_vtx->pir_desc; 2386 2387 /* 2388 * Keep track of interrupt requests in the PIR descriptor. This is 2389 * because the virtual APIC page pointed to by the VMCS cannot be 2390 * modified if the vcpu is running. 2391 */ 2392 idx = vector / 64; 2393 mask = 1UL << (vector % 64); 2394 atomic_set_long(&pir_desc->pir[idx], mask); 2395 notify = atomic_cmpset_long(&pir_desc->pending, 0, 1); 2396 2397 VMX_CTR_PIR(vlapic->vm, vlapic->vcpuid, pir_desc, notify, vector, 2398 level, "vmx_set_intr_ready"); 2399 return (notify); 2400} 2401 2402static int 2403vmx_pending_intr(struct vlapic *vlapic, int *vecptr) 2404{ 2405 struct vlapic_vtx *vlapic_vtx; 2406 struct pir_desc *pir_desc; 2407 struct LAPIC *lapic; 2408 uint64_t pending, pirval; 2409 uint32_t ppr, vpr; 2410 int i; 2411 2412 /* 2413 * This function is only expected to be called from the 'HLT' exit 2414 * handler which does not care about the vector that is pending. 2415 */ 2416 KASSERT(vecptr == NULL, ("vmx_pending_intr: vecptr must be NULL")); 2417 2418 vlapic_vtx = (struct vlapic_vtx *)vlapic; 2419 pir_desc = vlapic_vtx->pir_desc; 2420 2421 pending = atomic_load_acq_long(&pir_desc->pending); 2422 if (!pending) 2423 return (0); /* common case */ 2424 2425 /* 2426 * If there is an interrupt pending then it will be recognized only 2427 * if its priority is greater than the processor priority. 2428 * 2429 * Special case: if the processor priority is zero then any pending 2430 * interrupt will be recognized. 2431 */ 2432 lapic = vlapic->apic_page; 2433 ppr = lapic->ppr & 0xf0; 2434 if (ppr == 0) 2435 return (1); 2436 2437 VCPU_CTR1(vlapic->vm, vlapic->vcpuid, "HLT with non-zero PPR %d", 2438 lapic->ppr); 2439 2440 for (i = 3; i >= 0; i--) { 2441 pirval = pir_desc->pir[i]; 2442 if (pirval != 0) { 2443 vpr = (i * 64 + flsl(pirval) - 1) & 0xf0; 2444 return (vpr > ppr); 2445 } 2446 } 2447 return (0); 2448} 2449 2450static void 2451vmx_intr_accepted(struct vlapic *vlapic, int vector) 2452{ 2453 2454 panic("vmx_intr_accepted: not expected to be called"); 2455} 2456 2457static void 2458vmx_set_tmr(struct vlapic *vlapic, int vector, bool level) 2459{ 2460 struct vlapic_vtx *vlapic_vtx; 2461 struct vmx *vmx; 2462 struct vmcs *vmcs; 2463 uint64_t mask, val; 2464 2465 KASSERT(vector >= 0 && vector <= 255, ("invalid vector %d", vector)); 2466 KASSERT(!vcpu_is_running(vlapic->vm, vlapic->vcpuid, NULL), 2467 ("vmx_set_tmr: vcpu cannot be running")); 2468 2469 vlapic_vtx = (struct vlapic_vtx *)vlapic; 2470 vmx = vlapic_vtx->vmx; 2471 vmcs = &vmx->vmcs[vlapic->vcpuid]; 2472 mask = 1UL << (vector % 64); 2473 2474 VMPTRLD(vmcs); 2475 val = vmcs_read(VMCS_EOI_EXIT(vector)); 2476 if (level) 2477 val |= mask; 2478 else 2479 val &= ~mask; 2480 vmcs_write(VMCS_EOI_EXIT(vector), val); 2481 VMCLEAR(vmcs); 2482} 2483 2484static void 2485vmx_post_intr(struct vlapic *vlapic, int hostcpu) 2486{ 2487 2488 ipi_cpu(hostcpu, pirvec); 2489} 2490 2491/* 2492 * Transfer the pending interrupts in the PIR descriptor to the IRR 2493 * in the virtual APIC page. 2494 */ 2495static void 2496vmx_inject_pir(struct vlapic *vlapic) 2497{ 2498 struct vlapic_vtx *vlapic_vtx; 2499 struct pir_desc *pir_desc; 2500 struct LAPIC *lapic; 2501 uint64_t val, pirval; 2502 int rvi, pirbase; 2503 uint16_t intr_status_old, intr_status_new; 2504 2505 vlapic_vtx = (struct vlapic_vtx *)vlapic; 2506 pir_desc = vlapic_vtx->pir_desc; 2507 if (atomic_cmpset_long(&pir_desc->pending, 1, 0) == 0) { 2508 VCPU_CTR0(vlapic->vm, vlapic->vcpuid, "vmx_inject_pir: " 2509 "no posted interrupt pending"); 2510 return; 2511 } 2512 2513 pirval = 0; 2514 lapic = vlapic->apic_page; 2515 2516 val = atomic_readandclear_long(&pir_desc->pir[0]); 2517 if (val != 0) { 2518 lapic->irr0 |= val; 2519 lapic->irr1 |= val >> 32; 2520 pirbase = 0; 2521 pirval = val; 2522 } 2523 2524 val = atomic_readandclear_long(&pir_desc->pir[1]); 2525 if (val != 0) { 2526 lapic->irr2 |= val; 2527 lapic->irr3 |= val >> 32; 2528 pirbase = 64; 2529 pirval = val; 2530 } 2531 2532 val = atomic_readandclear_long(&pir_desc->pir[2]); 2533 if (val != 0) { 2534 lapic->irr4 |= val; 2535 lapic->irr5 |= val >> 32; 2536 pirbase = 128; 2537 pirval = val; 2538 } 2539 2540 val = atomic_readandclear_long(&pir_desc->pir[3]); 2541 if (val != 0) { 2542 lapic->irr6 |= val; 2543 lapic->irr7 |= val >> 32; 2544 pirbase = 192; 2545 pirval = val; 2546 } 2547 VLAPIC_CTR_IRR(vlapic, "vmx_inject_pir"); 2548 2549 /* 2550 * Update RVI so the processor can evaluate pending virtual 2551 * interrupts on VM-entry. 2552 */ 2553 if (pirval != 0) { 2554 rvi = pirbase + flsl(pirval) - 1; 2555 intr_status_old = vmcs_read(VMCS_GUEST_INTR_STATUS); 2556 intr_status_new = (intr_status_old & 0xFF00) | rvi; 2557 if (intr_status_new > intr_status_old) { 2558 vmcs_write(VMCS_GUEST_INTR_STATUS, intr_status_new); 2559 VCPU_CTR2(vlapic->vm, vlapic->vcpuid, "vmx_inject_pir: " 2560 "guest_intr_status changed from 0x%04x to 0x%04x", 2561 intr_status_old, intr_status_new); 2562 } 2563 } 2564} 2565 2566static struct vlapic * 2567vmx_vlapic_init(void *arg, int vcpuid) 2568{ 2569 struct vmx *vmx; 2570 struct vlapic *vlapic; 2571 struct vlapic_vtx *vlapic_vtx; 2572 2573 vmx = arg; 2574 2575 vlapic = malloc(sizeof(struct vlapic_vtx), M_VLAPIC, M_WAITOK | M_ZERO); 2576 vlapic->vm = vmx->vm; 2577 vlapic->vcpuid = vcpuid; 2578 vlapic->apic_page = (struct LAPIC *)&vmx->apic_page[vcpuid]; 2579 2580 vlapic_vtx = (struct vlapic_vtx *)vlapic; 2581 vlapic_vtx->pir_desc = &vmx->pir_desc[vcpuid]; 2582 vlapic_vtx->vmx = vmx; 2583 2584 if (virtual_interrupt_delivery) { 2585 vlapic->ops.set_intr_ready = vmx_set_intr_ready; 2586 vlapic->ops.pending_intr = vmx_pending_intr; 2587 vlapic->ops.intr_accepted = vmx_intr_accepted; 2588 vlapic->ops.set_tmr = vmx_set_tmr; 2589 } 2590 2591 if (posted_interrupts) 2592 vlapic->ops.post_intr = vmx_post_intr; 2593 2594 vlapic_init(vlapic); 2595 2596 return (vlapic); 2597} 2598 2599static void 2600vmx_vlapic_cleanup(void *arg, struct vlapic *vlapic) 2601{ 2602 2603 vlapic_cleanup(vlapic); 2604 free(vlapic, M_VLAPIC); 2605} 2606 2607struct vmm_ops vmm_ops_intel = { 2608 vmx_init, 2609 vmx_cleanup, 2610 vmx_restore, 2611 vmx_vminit, 2612 vmx_run, 2613 vmx_vmcleanup, 2614 vmx_getreg, 2615 vmx_setreg, 2616 vmx_getdesc, 2617 vmx_setdesc, 2618 vmx_inject, 2619 vmx_getcap, 2620 vmx_setcap, 2621 ept_vmspace_alloc, 2622 ept_vmspace_free, 2623 vmx_vlapic_init, 2624 vmx_vlapic_cleanup, 2625}; 2626