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/types.h> 35 #ifndef WITHOUT_CAPSICUM 36 #include <sys/capsicum.h> 37 #endif 38 #include <sys/mman.h> 39 #include <sys/time.h> 40 41 #include <amd64/vmm/intel/vmcs.h> 42 43 #include <machine/atomic.h> 44 #include <machine/segments.h> 45 46 #ifndef WITHOUT_CAPSICUM 47 #include <capsicum_helpers.h> 48 #endif 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <err.h> 53 #include <errno.h> 54 #include <libgen.h> 55 #include <unistd.h> 56 #include <assert.h> 57 #include <pthread.h> 58 #include <pthread_np.h> 59 #include <sysexits.h> 60 #include <stdbool.h> 61 #include <stdint.h> 62 63 #include <machine/vmm.h> 64 #ifndef WITHOUT_CAPSICUM 65 #include <machine/vmm_dev.h> 66 #endif 67 #include <vmmapi.h> 68 69 #include "bhyverun.h" 70 #include "acpi.h" 71 #include "atkbdc.h" 72 #include "inout.h" 73 #include "dbgport.h" 74 #include "fwctl.h" 75 #include "gdb.h" 76 #include "ioapic.h" 77 #include "mem.h" 78 #include "mevent.h" 79 #include "mptbl.h" 80 #include "pci_emul.h" 81 #include "pci_irq.h" 82 #include "pci_lpc.h" 83 #include "smbiostbl.h" 84 #include "xmsr.h" 85 #include "spinup_ap.h" 86 #include "rtc.h" 87 88 #define GUEST_NIO_PORT 0x488 /* guest upcalls via i/o port */ 89 90 #define MB (1024UL * 1024) 91 #define GB (1024UL * MB) 92 93 static const char * const vmx_exit_reason_desc[] = { 94 [EXIT_REASON_EXCEPTION] = "Exception or non-maskable interrupt (NMI)", 95 [EXIT_REASON_EXT_INTR] = "External interrupt", 96 [EXIT_REASON_TRIPLE_FAULT] = "Triple fault", 97 [EXIT_REASON_INIT] = "INIT signal", 98 [EXIT_REASON_SIPI] = "Start-up IPI (SIPI)", 99 [EXIT_REASON_IO_SMI] = "I/O system-management interrupt (SMI)", 100 [EXIT_REASON_SMI] = "Other SMI", 101 [EXIT_REASON_INTR_WINDOW] = "Interrupt window", 102 [EXIT_REASON_NMI_WINDOW] = "NMI window", 103 [EXIT_REASON_TASK_SWITCH] = "Task switch", 104 [EXIT_REASON_CPUID] = "CPUID", 105 [EXIT_REASON_GETSEC] = "GETSEC", 106 [EXIT_REASON_HLT] = "HLT", 107 [EXIT_REASON_INVD] = "INVD", 108 [EXIT_REASON_INVLPG] = "INVLPG", 109 [EXIT_REASON_RDPMC] = "RDPMC", 110 [EXIT_REASON_RDTSC] = "RDTSC", 111 [EXIT_REASON_RSM] = "RSM", 112 [EXIT_REASON_VMCALL] = "VMCALL", 113 [EXIT_REASON_VMCLEAR] = "VMCLEAR", 114 [EXIT_REASON_VMLAUNCH] = "VMLAUNCH", 115 [EXIT_REASON_VMPTRLD] = "VMPTRLD", 116 [EXIT_REASON_VMPTRST] = "VMPTRST", 117 [EXIT_REASON_VMREAD] = "VMREAD", 118 [EXIT_REASON_VMRESUME] = "VMRESUME", 119 [EXIT_REASON_VMWRITE] = "VMWRITE", 120 [EXIT_REASON_VMXOFF] = "VMXOFF", 121 [EXIT_REASON_VMXON] = "VMXON", 122 [EXIT_REASON_CR_ACCESS] = "Control-register accesses", 123 [EXIT_REASON_DR_ACCESS] = "MOV DR", 124 [EXIT_REASON_INOUT] = "I/O instruction", 125 [EXIT_REASON_RDMSR] = "RDMSR", 126 [EXIT_REASON_WRMSR] = "WRMSR", 127 [EXIT_REASON_INVAL_VMCS] = 128 "VM-entry failure due to invalid guest state", 129 [EXIT_REASON_INVAL_MSR] = "VM-entry failure due to MSR loading", 130 [EXIT_REASON_MWAIT] = "MWAIT", 131 [EXIT_REASON_MTF] = "Monitor trap flag", 132 [EXIT_REASON_MONITOR] = "MONITOR", 133 [EXIT_REASON_PAUSE] = "PAUSE", 134 [EXIT_REASON_MCE_DURING_ENTRY] = 135 "VM-entry failure due to machine-check event", 136 [EXIT_REASON_TPR] = "TPR below threshold", 137 [EXIT_REASON_APIC_ACCESS] = "APIC access", 138 [EXIT_REASON_VIRTUALIZED_EOI] = "Virtualized EOI", 139 [EXIT_REASON_GDTR_IDTR] = "Access to GDTR or IDTR", 140 [EXIT_REASON_LDTR_TR] = "Access to LDTR or TR", 141 [EXIT_REASON_EPT_FAULT] = "EPT violation", 142 [EXIT_REASON_EPT_MISCONFIG] = "EPT misconfiguration", 143 [EXIT_REASON_INVEPT] = "INVEPT", 144 [EXIT_REASON_RDTSCP] = "RDTSCP", 145 [EXIT_REASON_VMX_PREEMPT] = "VMX-preemption timer expired", 146 [EXIT_REASON_INVVPID] = "INVVPID", 147 [EXIT_REASON_WBINVD] = "WBINVD", 148 [EXIT_REASON_XSETBV] = "XSETBV", 149 [EXIT_REASON_APIC_WRITE] = "APIC write", 150 [EXIT_REASON_RDRAND] = "RDRAND", 151 [EXIT_REASON_INVPCID] = "INVPCID", 152 [EXIT_REASON_VMFUNC] = "VMFUNC", 153 [EXIT_REASON_ENCLS] = "ENCLS", 154 [EXIT_REASON_RDSEED] = "RDSEED", 155 [EXIT_REASON_PM_LOG_FULL] = "Page-modification log full", 156 [EXIT_REASON_XSAVES] = "XSAVES", 157 [EXIT_REASON_XRSTORS] = "XRSTORS" 158 }; 159 160 typedef int (*vmexit_handler_t)(struct vmctx *, struct vm_exit *, int *vcpu); 161 extern int vmexit_task_switch(struct vmctx *, struct vm_exit *, int *vcpu); 162 163 char *vmname; 164 165 int guest_ncpus; 166 uint16_t cores, maxcpus, sockets, threads; 167 168 char *guest_uuid_str; 169 170 static int gdb_port = 0; 171 static int guest_vmexit_on_hlt, guest_vmexit_on_pause; 172 static int virtio_msix = 1; 173 static int x2apic_mode = 0; /* default is xAPIC */ 174 175 static int strictio; 176 static int strictmsr = 1; 177 178 static int acpi; 179 180 static char *progname; 181 static const int BSP = 0; 182 183 static cpuset_t cpumask; 184 185 static void vm_loop(struct vmctx *ctx, int vcpu, uint64_t rip); 186 187 static struct vm_exit vmexit[VM_MAXCPU]; 188 189 struct bhyvestats { 190 uint64_t vmexit_bogus; 191 uint64_t vmexit_reqidle; 192 uint64_t vmexit_hlt; 193 uint64_t vmexit_pause; 194 uint64_t vmexit_mtrap; 195 uint64_t vmexit_inst_emul; 196 uint64_t cpu_switch_rotate; 197 uint64_t cpu_switch_direct; 198 } stats; 199 200 struct mt_vmm_info { 201 pthread_t mt_thr; 202 struct vmctx *mt_ctx; 203 int mt_vcpu; 204 } mt_vmm_info[VM_MAXCPU]; 205 206 static cpuset_t *vcpumap[VM_MAXCPU] = { NULL }; 207 208 static void 209 usage(int code) 210 { 211 212 fprintf(stderr, 213 "Usage: %s [-abehuwxACHPSWY]\n" 214 " %*s [-c [[cpus=]numcpus][,sockets=n][,cores=n][,threads=n]]\n" 215 " %*s [-g <gdb port>] [-l <lpc>]\n" 216 " %*s [-m mem] [-p vcpu:hostcpu] [-s <pci>] [-U uuid] <vm>\n" 217 " -a: local apic is in xAPIC mode (deprecated)\n" 218 " -A: create ACPI tables\n" 219 " -c: number of cpus and/or topology specification\n" 220 " -C: include guest memory in core file\n" 221 " -e: exit on unhandled I/O access\n" 222 " -g: gdb port\n" 223 " -h: help\n" 224 " -H: vmexit from the guest on hlt\n" 225 " -l: LPC device configuration\n" 226 " -m: memory size in MB\n" 227 " -p: pin 'vcpu' to 'hostcpu'\n" 228 " -P: vmexit from the guest on pause\n" 229 " -s: <slot,driver,configinfo> PCI slot config\n" 230 " -S: guest memory cannot be swapped\n" 231 " -u: RTC keeps UTC time\n" 232 " -U: uuid\n" 233 " -w: ignore unimplemented MSRs\n" 234 " -W: force virtio to use single-vector MSI\n" 235 " -x: local apic is in x2APIC mode\n" 236 " -Y: disable MPtable generation\n", 237 progname, (int)strlen(progname), "", (int)strlen(progname), "", 238 (int)strlen(progname), ""); 239 240 exit(code); 241 } 242 243 /* 244 * XXX This parser is known to have the following issues: 245 * 1. It accepts null key=value tokens ",,". 246 * 2. It accepts whitespace after = and before value. 247 * 3. Values out of range of INT are silently wrapped. 248 * 4. It doesn't check non-final values. 249 * 5. The apparently bogus limits of UINT16_MAX are for future expansion. 250 * 251 * The acceptance of a null specification ('-c ""') is by design to match the 252 * manual page syntax specification, this results in a topology of 1 vCPU. 253 */ 254 static int 255 topology_parse(const char *opt) 256 { 257 uint64_t ncpus; 258 int c, chk, n, s, t, tmp; 259 char *cp, *str; 260 bool ns, scts; 261 262 c = 1, n = 1, s = 1, t = 1; 263 ns = false, scts = false; 264 str = strdup(opt); 265 if (str == NULL) 266 goto out; 267 268 while ((cp = strsep(&str, ",")) != NULL) { 269 if (sscanf(cp, "%i%n", &tmp, &chk) == 1) { 270 n = tmp; 271 ns = true; 272 } else if (sscanf(cp, "cpus=%i%n", &tmp, &chk) == 1) { 273 n = tmp; 274 ns = true; 275 } else if (sscanf(cp, "sockets=%i%n", &tmp, &chk) == 1) { 276 s = tmp; 277 scts = true; 278 } else if (sscanf(cp, "cores=%i%n", &tmp, &chk) == 1) { 279 c = tmp; 280 scts = true; 281 } else if (sscanf(cp, "threads=%i%n", &tmp, &chk) == 1) { 282 t = tmp; 283 scts = true; 284 #ifdef notyet /* Do not expose this until vmm.ko implements it */ 285 } else if (sscanf(cp, "maxcpus=%i%n", &tmp, &chk) == 1) { 286 m = tmp; 287 #endif 288 /* Skip the empty argument case from -c "" */ 289 } else if (cp[0] == '\0') 290 continue; 291 else 292 goto out; 293 /* Any trailing garbage causes an error */ 294 if (cp[chk] != '\0') 295 goto out; 296 } 297 free(str); 298 str = NULL; 299 300 /* 301 * Range check 1 <= n <= UINT16_MAX all values 302 */ 303 if (n < 1 || s < 1 || c < 1 || t < 1 || 304 n > UINT16_MAX || s > UINT16_MAX || c > UINT16_MAX || 305 t > UINT16_MAX) 306 return (-1); 307 308 /* If only the cpus was specified, use that as sockets */ 309 if (!scts) 310 s = n; 311 /* 312 * Compute sockets * cores * threads avoiding overflow 313 * The range check above insures these are 16 bit values 314 * If n was specified check it against computed ncpus 315 */ 316 ncpus = (uint64_t)s * c * t; 317 if (ncpus > UINT16_MAX || (ns && n != ncpus)) 318 return (-1); 319 320 guest_ncpus = ncpus; 321 sockets = s; 322 cores = c; 323 threads = t; 324 return(0); 325 326 out: 327 free(str); 328 return (-1); 329 } 330 331 static int 332 pincpu_parse(const char *opt) 333 { 334 int vcpu, pcpu; 335 336 if (sscanf(opt, "%d:%d", &vcpu, &pcpu) != 2) { 337 fprintf(stderr, "invalid format: %s\n", opt); 338 return (-1); 339 } 340 341 if (vcpu < 0 || vcpu >= VM_MAXCPU) { 342 fprintf(stderr, "vcpu '%d' outside valid range from 0 to %d\n", 343 vcpu, VM_MAXCPU - 1); 344 return (-1); 345 } 346 347 if (pcpu < 0 || pcpu >= CPU_SETSIZE) { 348 fprintf(stderr, "hostcpu '%d' outside valid range from " 349 "0 to %d\n", pcpu, CPU_SETSIZE - 1); 350 return (-1); 351 } 352 353 if (vcpumap[vcpu] == NULL) { 354 if ((vcpumap[vcpu] = malloc(sizeof(cpuset_t))) == NULL) { 355 perror("malloc"); 356 return (-1); 357 } 358 CPU_ZERO(vcpumap[vcpu]); 359 } 360 CPU_SET(pcpu, vcpumap[vcpu]); 361 return (0); 362 } 363 364 void 365 vm_inject_fault(void *arg, int vcpu, int vector, int errcode_valid, 366 int errcode) 367 { 368 struct vmctx *ctx; 369 int error, restart_instruction; 370 371 ctx = arg; 372 restart_instruction = 1; 373 374 error = vm_inject_exception(ctx, vcpu, vector, errcode_valid, errcode, 375 restart_instruction); 376 assert(error == 0); 377 } 378 379 void * 380 paddr_guest2host(struct vmctx *ctx, uintptr_t gaddr, size_t len) 381 { 382 383 return (vm_map_gpa(ctx, gaddr, len)); 384 } 385 386 int 387 fbsdrun_vmexit_on_pause(void) 388 { 389 390 return (guest_vmexit_on_pause); 391 } 392 393 int 394 fbsdrun_vmexit_on_hlt(void) 395 { 396 397 return (guest_vmexit_on_hlt); 398 } 399 400 int 401 fbsdrun_virtio_msix(void) 402 { 403 404 return (virtio_msix); 405 } 406 407 static void * 408 fbsdrun_start_thread(void *param) 409 { 410 char tname[MAXCOMLEN + 1]; 411 struct mt_vmm_info *mtp; 412 int vcpu; 413 414 mtp = param; 415 vcpu = mtp->mt_vcpu; 416 417 snprintf(tname, sizeof(tname), "vcpu %d", vcpu); 418 pthread_set_name_np(mtp->mt_thr, tname); 419 420 if (gdb_port != 0) 421 gdb_cpu_add(vcpu); 422 423 vm_loop(mtp->mt_ctx, vcpu, vmexit[vcpu].rip); 424 425 /* not reached */ 426 exit(1); 427 return (NULL); 428 } 429 430 void 431 fbsdrun_addcpu(struct vmctx *ctx, int fromcpu, int newcpu, uint64_t rip) 432 { 433 int error; 434 435 assert(fromcpu == BSP); 436 437 /* 438 * The 'newcpu' must be activated in the context of 'fromcpu'. If 439 * vm_activate_cpu() is delayed until newcpu's pthread starts running 440 * then vmm.ko is out-of-sync with bhyve and this can create a race 441 * with vm_suspend(). 442 */ 443 error = vm_activate_cpu(ctx, newcpu); 444 if (error != 0) 445 err(EX_OSERR, "could not activate CPU %d", newcpu); 446 447 CPU_SET_ATOMIC(newcpu, &cpumask); 448 449 /* 450 * Set up the vmexit struct to allow execution to start 451 * at the given RIP 452 */ 453 vmexit[newcpu].rip = rip; 454 vmexit[newcpu].inst_length = 0; 455 456 mt_vmm_info[newcpu].mt_ctx = ctx; 457 mt_vmm_info[newcpu].mt_vcpu = newcpu; 458 459 error = pthread_create(&mt_vmm_info[newcpu].mt_thr, NULL, 460 fbsdrun_start_thread, &mt_vmm_info[newcpu]); 461 assert(error == 0); 462 } 463 464 static int 465 fbsdrun_deletecpu(struct vmctx *ctx, int vcpu) 466 { 467 468 if (!CPU_ISSET(vcpu, &cpumask)) { 469 fprintf(stderr, "Attempting to delete unknown cpu %d\n", vcpu); 470 exit(4); 471 } 472 473 CPU_CLR_ATOMIC(vcpu, &cpumask); 474 return (CPU_EMPTY(&cpumask)); 475 } 476 477 static int 478 vmexit_handle_notify(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu, 479 uint32_t eax) 480 { 481 #if BHYVE_DEBUG 482 /* 483 * put guest-driven debug here 484 */ 485 #endif 486 return (VMEXIT_CONTINUE); 487 } 488 489 static int 490 vmexit_inout(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu) 491 { 492 int error; 493 int bytes, port, in, out; 494 int vcpu; 495 496 vcpu = *pvcpu; 497 498 port = vme->u.inout.port; 499 bytes = vme->u.inout.bytes; 500 in = vme->u.inout.in; 501 out = !in; 502 503 /* Extra-special case of host notifications */ 504 if (out && port == GUEST_NIO_PORT) { 505 error = vmexit_handle_notify(ctx, vme, pvcpu, vme->u.inout.eax); 506 return (error); 507 } 508 509 error = emulate_inout(ctx, vcpu, vme, strictio); 510 if (error) { 511 fprintf(stderr, "Unhandled %s%c 0x%04x at 0x%lx\n", 512 in ? "in" : "out", 513 bytes == 1 ? 'b' : (bytes == 2 ? 'w' : 'l'), 514 port, vmexit->rip); 515 return (VMEXIT_ABORT); 516 } else { 517 return (VMEXIT_CONTINUE); 518 } 519 } 520 521 static int 522 vmexit_rdmsr(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu) 523 { 524 uint64_t val; 525 uint32_t eax, edx; 526 int error; 527 528 val = 0; 529 error = emulate_rdmsr(ctx, *pvcpu, vme->u.msr.code, &val); 530 if (error != 0) { 531 fprintf(stderr, "rdmsr to register %#x on vcpu %d\n", 532 vme->u.msr.code, *pvcpu); 533 if (strictmsr) { 534 vm_inject_gp(ctx, *pvcpu); 535 return (VMEXIT_CONTINUE); 536 } 537 } 538 539 eax = val; 540 error = vm_set_register(ctx, *pvcpu, VM_REG_GUEST_RAX, eax); 541 assert(error == 0); 542 543 edx = val >> 32; 544 error = vm_set_register(ctx, *pvcpu, VM_REG_GUEST_RDX, edx); 545 assert(error == 0); 546 547 return (VMEXIT_CONTINUE); 548 } 549 550 static int 551 vmexit_wrmsr(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu) 552 { 553 int error; 554 555 error = emulate_wrmsr(ctx, *pvcpu, vme->u.msr.code, vme->u.msr.wval); 556 if (error != 0) { 557 fprintf(stderr, "wrmsr to register %#x(%#lx) on vcpu %d\n", 558 vme->u.msr.code, vme->u.msr.wval, *pvcpu); 559 if (strictmsr) { 560 vm_inject_gp(ctx, *pvcpu); 561 return (VMEXIT_CONTINUE); 562 } 563 } 564 return (VMEXIT_CONTINUE); 565 } 566 567 static int 568 vmexit_spinup_ap(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu) 569 { 570 571 (void)spinup_ap(ctx, *pvcpu, 572 vme->u.spinup_ap.vcpu, vme->u.spinup_ap.rip); 573 574 return (VMEXIT_CONTINUE); 575 } 576 577 #define DEBUG_EPT_MISCONFIG 578 #ifdef DEBUG_EPT_MISCONFIG 579 #define VMCS_GUEST_PHYSICAL_ADDRESS 0x00002400 580 581 static uint64_t ept_misconfig_gpa, ept_misconfig_pte[4]; 582 static int ept_misconfig_ptenum; 583 #endif 584 585 static const char * 586 vmexit_vmx_desc(uint32_t exit_reason) 587 { 588 589 if (exit_reason >= nitems(vmx_exit_reason_desc) || 590 vmx_exit_reason_desc[exit_reason] == NULL) 591 return ("Unknown"); 592 return (vmx_exit_reason_desc[exit_reason]); 593 } 594 595 static int 596 vmexit_vmx(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) 597 { 598 599 fprintf(stderr, "vm exit[%d]\n", *pvcpu); 600 fprintf(stderr, "\treason\t\tVMX\n"); 601 fprintf(stderr, "\trip\t\t0x%016lx\n", vmexit->rip); 602 fprintf(stderr, "\tinst_length\t%d\n", vmexit->inst_length); 603 fprintf(stderr, "\tstatus\t\t%d\n", vmexit->u.vmx.status); 604 fprintf(stderr, "\texit_reason\t%u (%s)\n", vmexit->u.vmx.exit_reason, 605 vmexit_vmx_desc(vmexit->u.vmx.exit_reason)); 606 fprintf(stderr, "\tqualification\t0x%016lx\n", 607 vmexit->u.vmx.exit_qualification); 608 fprintf(stderr, "\tinst_type\t\t%d\n", vmexit->u.vmx.inst_type); 609 fprintf(stderr, "\tinst_error\t\t%d\n", vmexit->u.vmx.inst_error); 610 #ifdef DEBUG_EPT_MISCONFIG 611 if (vmexit->u.vmx.exit_reason == EXIT_REASON_EPT_MISCONFIG) { 612 vm_get_register(ctx, *pvcpu, 613 VMCS_IDENT(VMCS_GUEST_PHYSICAL_ADDRESS), 614 &ept_misconfig_gpa); 615 vm_get_gpa_pmap(ctx, ept_misconfig_gpa, ept_misconfig_pte, 616 &ept_misconfig_ptenum); 617 fprintf(stderr, "\tEPT misconfiguration:\n"); 618 fprintf(stderr, "\t\tGPA: %#lx\n", ept_misconfig_gpa); 619 fprintf(stderr, "\t\tPTE(%d): %#lx %#lx %#lx %#lx\n", 620 ept_misconfig_ptenum, ept_misconfig_pte[0], 621 ept_misconfig_pte[1], ept_misconfig_pte[2], 622 ept_misconfig_pte[3]); 623 } 624 #endif /* DEBUG_EPT_MISCONFIG */ 625 return (VMEXIT_ABORT); 626 } 627 628 static int 629 vmexit_svm(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) 630 { 631 632 fprintf(stderr, "vm exit[%d]\n", *pvcpu); 633 fprintf(stderr, "\treason\t\tSVM\n"); 634 fprintf(stderr, "\trip\t\t0x%016lx\n", vmexit->rip); 635 fprintf(stderr, "\tinst_length\t%d\n", vmexit->inst_length); 636 fprintf(stderr, "\texitcode\t%#lx\n", vmexit->u.svm.exitcode); 637 fprintf(stderr, "\texitinfo1\t%#lx\n", vmexit->u.svm.exitinfo1); 638 fprintf(stderr, "\texitinfo2\t%#lx\n", vmexit->u.svm.exitinfo2); 639 return (VMEXIT_ABORT); 640 } 641 642 static int 643 vmexit_bogus(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) 644 { 645 646 assert(vmexit->inst_length == 0); 647 648 stats.vmexit_bogus++; 649 650 return (VMEXIT_CONTINUE); 651 } 652 653 static int 654 vmexit_reqidle(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) 655 { 656 657 assert(vmexit->inst_length == 0); 658 659 stats.vmexit_reqidle++; 660 661 return (VMEXIT_CONTINUE); 662 } 663 664 static int 665 vmexit_hlt(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) 666 { 667 668 stats.vmexit_hlt++; 669 670 /* 671 * Just continue execution with the next instruction. We use 672 * the HLT VM exit as a way to be friendly with the host 673 * scheduler. 674 */ 675 return (VMEXIT_CONTINUE); 676 } 677 678 static int 679 vmexit_pause(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) 680 { 681 682 stats.vmexit_pause++; 683 684 return (VMEXIT_CONTINUE); 685 } 686 687 static int 688 vmexit_mtrap(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) 689 { 690 691 assert(vmexit->inst_length == 0); 692 693 stats.vmexit_mtrap++; 694 695 if (gdb_port == 0) { 696 fprintf(stderr, "vm_loop: unexpected VMEXIT_MTRAP\n"); 697 exit(4); 698 } 699 gdb_cpu_mtrap(*pvcpu); 700 return (VMEXIT_CONTINUE); 701 } 702 703 static int 704 vmexit_inst_emul(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) 705 { 706 int err, i; 707 struct vie *vie; 708 709 stats.vmexit_inst_emul++; 710 711 vie = &vmexit->u.inst_emul.vie; 712 err = emulate_mem(ctx, *pvcpu, vmexit->u.inst_emul.gpa, 713 vie, &vmexit->u.inst_emul.paging); 714 715 if (err) { 716 if (err == ESRCH) { 717 fprintf(stderr, "Unhandled memory access to 0x%lx\n", 718 vmexit->u.inst_emul.gpa); 719 } 720 721 fprintf(stderr, "Failed to emulate instruction ["); 722 for (i = 0; i < vie->num_valid; i++) { 723 fprintf(stderr, "0x%02x%s", vie->inst[i], 724 i != (vie->num_valid - 1) ? " " : ""); 725 } 726 fprintf(stderr, "] at 0x%lx\n", vmexit->rip); 727 return (VMEXIT_ABORT); 728 } 729 730 return (VMEXIT_CONTINUE); 731 } 732 733 static pthread_mutex_t resetcpu_mtx = PTHREAD_MUTEX_INITIALIZER; 734 static pthread_cond_t resetcpu_cond = PTHREAD_COND_INITIALIZER; 735 736 static int 737 vmexit_suspend(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) 738 { 739 enum vm_suspend_how how; 740 741 how = vmexit->u.suspended.how; 742 743 fbsdrun_deletecpu(ctx, *pvcpu); 744 745 if (*pvcpu != BSP) { 746 pthread_mutex_lock(&resetcpu_mtx); 747 pthread_cond_signal(&resetcpu_cond); 748 pthread_mutex_unlock(&resetcpu_mtx); 749 pthread_exit(NULL); 750 } 751 752 pthread_mutex_lock(&resetcpu_mtx); 753 while (!CPU_EMPTY(&cpumask)) { 754 pthread_cond_wait(&resetcpu_cond, &resetcpu_mtx); 755 } 756 pthread_mutex_unlock(&resetcpu_mtx); 757 758 switch (how) { 759 case VM_SUSPEND_RESET: 760 exit(0); 761 case VM_SUSPEND_POWEROFF: 762 exit(1); 763 case VM_SUSPEND_HALT: 764 exit(2); 765 case VM_SUSPEND_TRIPLEFAULT: 766 exit(3); 767 default: 768 fprintf(stderr, "vmexit_suspend: invalid reason %d\n", how); 769 exit(100); 770 } 771 return (0); /* NOTREACHED */ 772 } 773 774 static int 775 vmexit_debug(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) 776 { 777 778 if (gdb_port == 0) { 779 fprintf(stderr, "vm_loop: unexpected VMEXIT_DEBUG\n"); 780 exit(4); 781 } 782 gdb_cpu_suspend(*pvcpu); 783 return (VMEXIT_CONTINUE); 784 } 785 786 static int 787 vmexit_breakpoint(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) 788 { 789 790 if (gdb_port == 0) { 791 fprintf(stderr, "vm_loop: unexpected VMEXIT_DEBUG\n"); 792 exit(4); 793 } 794 gdb_cpu_breakpoint(*pvcpu, vmexit); 795 return (VMEXIT_CONTINUE); 796 } 797 798 static vmexit_handler_t handler[VM_EXITCODE_MAX] = { 799 [VM_EXITCODE_INOUT] = vmexit_inout, 800 [VM_EXITCODE_INOUT_STR] = vmexit_inout, 801 [VM_EXITCODE_VMX] = vmexit_vmx, 802 [VM_EXITCODE_SVM] = vmexit_svm, 803 [VM_EXITCODE_BOGUS] = vmexit_bogus, 804 [VM_EXITCODE_REQIDLE] = vmexit_reqidle, 805 [VM_EXITCODE_RDMSR] = vmexit_rdmsr, 806 [VM_EXITCODE_WRMSR] = vmexit_wrmsr, 807 [VM_EXITCODE_MTRAP] = vmexit_mtrap, 808 [VM_EXITCODE_INST_EMUL] = vmexit_inst_emul, 809 [VM_EXITCODE_SPINUP_AP] = vmexit_spinup_ap, 810 [VM_EXITCODE_SUSPENDED] = vmexit_suspend, 811 [VM_EXITCODE_TASK_SWITCH] = vmexit_task_switch, 812 [VM_EXITCODE_DEBUG] = vmexit_debug, 813 [VM_EXITCODE_BPT] = vmexit_breakpoint, 814 }; 815 816 static void 817 vm_loop(struct vmctx *ctx, int vcpu, uint64_t startrip) 818 { 819 int error, rc; 820 enum vm_exitcode exitcode; 821 cpuset_t active_cpus; 822 823 if (vcpumap[vcpu] != NULL) { 824 error = pthread_setaffinity_np(pthread_self(), 825 sizeof(cpuset_t), vcpumap[vcpu]); 826 assert(error == 0); 827 } 828 829 error = vm_active_cpus(ctx, &active_cpus); 830 assert(CPU_ISSET(vcpu, &active_cpus)); 831 832 error = vm_set_register(ctx, vcpu, VM_REG_GUEST_RIP, startrip); 833 assert(error == 0); 834 835 while (1) { 836 error = vm_run(ctx, vcpu, &vmexit[vcpu]); 837 if (error != 0) 838 break; 839 840 exitcode = vmexit[vcpu].exitcode; 841 if (exitcode >= VM_EXITCODE_MAX || handler[exitcode] == NULL) { 842 fprintf(stderr, "vm_loop: unexpected exitcode 0x%x\n", 843 exitcode); 844 exit(4); 845 } 846 847 rc = (*handler[exitcode])(ctx, &vmexit[vcpu], &vcpu); 848 849 switch (rc) { 850 case VMEXIT_CONTINUE: 851 break; 852 case VMEXIT_ABORT: 853 abort(); 854 default: 855 exit(4); 856 } 857 } 858 fprintf(stderr, "vm_run error %d, errno %d\n", error, errno); 859 } 860 861 static int 862 num_vcpus_allowed(struct vmctx *ctx) 863 { 864 int tmp, error; 865 866 error = vm_get_capability(ctx, BSP, VM_CAP_UNRESTRICTED_GUEST, &tmp); 867 868 /* 869 * The guest is allowed to spinup more than one processor only if the 870 * UNRESTRICTED_GUEST capability is available. 871 */ 872 if (error == 0) 873 return (VM_MAXCPU); 874 else 875 return (1); 876 } 877 878 void 879 fbsdrun_set_capabilities(struct vmctx *ctx, int cpu) 880 { 881 int err, tmp; 882 883 if (fbsdrun_vmexit_on_hlt()) { 884 err = vm_get_capability(ctx, cpu, VM_CAP_HALT_EXIT, &tmp); 885 if (err < 0) { 886 fprintf(stderr, "VM exit on HLT not supported\n"); 887 exit(4); 888 } 889 vm_set_capability(ctx, cpu, VM_CAP_HALT_EXIT, 1); 890 if (cpu == BSP) 891 handler[VM_EXITCODE_HLT] = vmexit_hlt; 892 } 893 894 if (fbsdrun_vmexit_on_pause()) { 895 /* 896 * pause exit support required for this mode 897 */ 898 err = vm_get_capability(ctx, cpu, VM_CAP_PAUSE_EXIT, &tmp); 899 if (err < 0) { 900 fprintf(stderr, 901 "SMP mux requested, no pause support\n"); 902 exit(4); 903 } 904 vm_set_capability(ctx, cpu, VM_CAP_PAUSE_EXIT, 1); 905 if (cpu == BSP) 906 handler[VM_EXITCODE_PAUSE] = vmexit_pause; 907 } 908 909 if (x2apic_mode) 910 err = vm_set_x2apic_state(ctx, cpu, X2APIC_ENABLED); 911 else 912 err = vm_set_x2apic_state(ctx, cpu, X2APIC_DISABLED); 913 914 if (err) { 915 fprintf(stderr, "Unable to set x2apic state (%d)\n", err); 916 exit(4); 917 } 918 919 vm_set_capability(ctx, cpu, VM_CAP_ENABLE_INVPCID, 1); 920 } 921 922 static struct vmctx * 923 do_open(const char *vmname) 924 { 925 struct vmctx *ctx; 926 int error; 927 bool reinit, romboot; 928 #ifndef WITHOUT_CAPSICUM 929 cap_rights_t rights; 930 const cap_ioctl_t *cmds; 931 size_t ncmds; 932 #endif 933 934 reinit = romboot = false; 935 936 if (lpc_bootrom()) 937 romboot = true; 938 939 error = vm_create(vmname); 940 if (error) { 941 if (errno == EEXIST) { 942 if (romboot) { 943 reinit = true; 944 } else { 945 /* 946 * The virtual machine has been setup by the 947 * userspace bootloader. 948 */ 949 } 950 } else { 951 perror("vm_create"); 952 exit(4); 953 } 954 } else { 955 if (!romboot) { 956 /* 957 * If the virtual machine was just created then a 958 * bootrom must be configured to boot it. 959 */ 960 fprintf(stderr, "virtual machine cannot be booted\n"); 961 exit(4); 962 } 963 } 964 965 ctx = vm_open(vmname); 966 if (ctx == NULL) { 967 perror("vm_open"); 968 exit(4); 969 } 970 971 #ifndef WITHOUT_CAPSICUM 972 cap_rights_init(&rights, CAP_IOCTL, CAP_MMAP_RW); 973 if (caph_rights_limit(vm_get_device_fd(ctx), &rights) == -1) 974 errx(EX_OSERR, "Unable to apply rights for sandbox"); 975 vm_get_ioctls(&ncmds); 976 cmds = vm_get_ioctls(NULL); 977 if (cmds == NULL) 978 errx(EX_OSERR, "out of memory"); 979 if (caph_ioctls_limit(vm_get_device_fd(ctx), cmds, ncmds) == -1) 980 errx(EX_OSERR, "Unable to apply rights for sandbox"); 981 free((cap_ioctl_t *)cmds); 982 #endif 983 984 if (reinit) { 985 error = vm_reinit(ctx); 986 if (error) { 987 perror("vm_reinit"); 988 exit(4); 989 } 990 } 991 error = vm_set_topology(ctx, sockets, cores, threads, maxcpus); 992 if (error) 993 errx(EX_OSERR, "vm_set_topology"); 994 return (ctx); 995 } 996 997 int 998 main(int argc, char *argv[]) 999 { 1000 int c, error, dbg_port, err, bvmcons; 1001 int max_vcpus, mptgen, memflags; 1002 int rtc_localtime; 1003 bool gdb_stop; 1004 struct vmctx *ctx; 1005 uint64_t rip; 1006 size_t memsize; 1007 char *optstr; 1008 1009 bvmcons = 0; 1010 progname = basename(argv[0]); 1011 dbg_port = 0; 1012 gdb_stop = false; 1013 guest_ncpus = 1; 1014 sockets = cores = threads = 1; 1015 maxcpus = 0; 1016 memsize = 256 * MB; 1017 mptgen = 1; 1018 rtc_localtime = 1; 1019 memflags = 0; 1020 1021 optstr = "abehuwxACHIPSWYp:g:G:c:s:m:l:U:"; 1022 while ((c = getopt(argc, argv, optstr)) != -1) { 1023 switch (c) { 1024 case 'a': 1025 x2apic_mode = 0; 1026 break; 1027 case 'A': 1028 acpi = 1; 1029 break; 1030 case 'b': 1031 bvmcons = 1; 1032 break; 1033 case 'p': 1034 if (pincpu_parse(optarg) != 0) { 1035 errx(EX_USAGE, "invalid vcpu pinning " 1036 "configuration '%s'", optarg); 1037 } 1038 break; 1039 case 'c': 1040 if (topology_parse(optarg) != 0) { 1041 errx(EX_USAGE, "invalid cpu topology " 1042 "'%s'", optarg); 1043 } 1044 break; 1045 case 'C': 1046 memflags |= VM_MEM_F_INCORE; 1047 break; 1048 case 'g': 1049 dbg_port = atoi(optarg); 1050 break; 1051 case 'G': 1052 if (optarg[0] == 'w') { 1053 gdb_stop = true; 1054 optarg++; 1055 } 1056 gdb_port = atoi(optarg); 1057 break; 1058 case 'l': 1059 if (strncmp(optarg, "help", strlen(optarg)) == 0) { 1060 lpc_print_supported_devices(); 1061 exit(0); 1062 } else if (lpc_device_parse(optarg) != 0) { 1063 errx(EX_USAGE, "invalid lpc device " 1064 "configuration '%s'", optarg); 1065 } 1066 break; 1067 case 's': 1068 if (strncmp(optarg, "help", strlen(optarg)) == 0) { 1069 pci_print_supported_devices(); 1070 exit(0); 1071 } else if (pci_parse_slot(optarg) != 0) 1072 exit(4); 1073 else 1074 break; 1075 case 'S': 1076 memflags |= VM_MEM_F_WIRED; 1077 break; 1078 case 'm': 1079 error = vm_parse_memsize(optarg, &memsize); 1080 if (error) 1081 errx(EX_USAGE, "invalid memsize '%s'", optarg); 1082 break; 1083 case 'H': 1084 guest_vmexit_on_hlt = 1; 1085 break; 1086 case 'I': 1087 /* 1088 * The "-I" option was used to add an ioapic to the 1089 * virtual machine. 1090 * 1091 * An ioapic is now provided unconditionally for each 1092 * virtual machine and this option is now deprecated. 1093 */ 1094 break; 1095 case 'P': 1096 guest_vmexit_on_pause = 1; 1097 break; 1098 case 'e': 1099 strictio = 1; 1100 break; 1101 case 'u': 1102 rtc_localtime = 0; 1103 break; 1104 case 'U': 1105 guest_uuid_str = optarg; 1106 break; 1107 case 'w': 1108 strictmsr = 0; 1109 break; 1110 case 'W': 1111 virtio_msix = 0; 1112 break; 1113 case 'x': 1114 x2apic_mode = 1; 1115 break; 1116 case 'Y': 1117 mptgen = 0; 1118 break; 1119 case 'h': 1120 usage(0); 1121 default: 1122 usage(1); 1123 } 1124 } 1125 argc -= optind; 1126 argv += optind; 1127 1128 if (argc != 1) 1129 usage(1); 1130 1131 vmname = argv[0]; 1132 ctx = do_open(vmname); 1133 1134 max_vcpus = num_vcpus_allowed(ctx); 1135 if (guest_ncpus > max_vcpus) { 1136 fprintf(stderr, "%d vCPUs requested but only %d available\n", 1137 guest_ncpus, max_vcpus); 1138 exit(4); 1139 } 1140 1141 fbsdrun_set_capabilities(ctx, BSP); 1142 1143 vm_set_memflags(ctx, memflags); 1144 err = vm_setup_memory(ctx, memsize, VM_MMAP_ALL); 1145 if (err) { 1146 fprintf(stderr, "Unable to setup memory (%d)\n", errno); 1147 exit(4); 1148 } 1149 1150 error = init_msr(); 1151 if (error) { 1152 fprintf(stderr, "init_msr error %d", error); 1153 exit(4); 1154 } 1155 1156 init_mem(); 1157 init_inout(); 1158 atkbdc_init(ctx); 1159 pci_irq_init(ctx); 1160 ioapic_init(ctx); 1161 1162 rtc_init(ctx, rtc_localtime); 1163 sci_init(ctx); 1164 1165 /* 1166 * Exit if a device emulation finds an error in its initilization 1167 */ 1168 if (init_pci(ctx) != 0) { 1169 perror("device emulation initialization error"); 1170 exit(4); 1171 } 1172 1173 if (dbg_port != 0) 1174 init_dbgport(dbg_port); 1175 1176 if (gdb_port != 0) 1177 init_gdb(ctx, gdb_port, gdb_stop); 1178 1179 if (bvmcons) 1180 init_bvmcons(); 1181 1182 if (lpc_bootrom()) { 1183 if (vm_set_capability(ctx, BSP, VM_CAP_UNRESTRICTED_GUEST, 1)) { 1184 fprintf(stderr, "ROM boot failed: unrestricted guest " 1185 "capability not available\n"); 1186 exit(4); 1187 } 1188 error = vcpu_reset(ctx, BSP); 1189 assert(error == 0); 1190 } 1191 1192 error = vm_get_register(ctx, BSP, VM_REG_GUEST_RIP, &rip); 1193 assert(error == 0); 1194 1195 /* 1196 * build the guest tables, MP etc. 1197 */ 1198 if (mptgen) { 1199 error = mptable_build(ctx, guest_ncpus); 1200 if (error) { 1201 perror("error to build the guest tables"); 1202 exit(4); 1203 } 1204 } 1205 1206 error = smbios_build(ctx); 1207 assert(error == 0); 1208 1209 if (acpi) { 1210 error = acpi_build(ctx, guest_ncpus); 1211 assert(error == 0); 1212 } 1213 1214 if (lpc_bootrom()) 1215 fwctl_init(); 1216 1217 /* 1218 * Change the proc title to include the VM name. 1219 */ 1220 setproctitle("%s", vmname); 1221 1222 #ifndef WITHOUT_CAPSICUM 1223 caph_cache_catpages(); 1224 1225 if (caph_limit_stdout() == -1 || caph_limit_stderr() == -1) 1226 errx(EX_OSERR, "Unable to apply rights for sandbox"); 1227 1228 if (caph_enter() == -1) 1229 errx(EX_OSERR, "cap_enter() failed"); 1230 #endif 1231 1232 /* 1233 * Add CPU 0 1234 */ 1235 fbsdrun_addcpu(ctx, BSP, BSP, rip); 1236 1237 /* 1238 * Head off to the main event dispatch loop 1239 */ 1240 mevent_dispatch(); 1241 1242 exit(4); 1243 } 1244