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 * $FreeBSD$
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include <sys/types.h>
33 #include <sys/mman.h>
34 #include <sys/time.h>
35
36 #include <machine/atomic.h>
37 #include <machine/segments.h>
38
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <err.h>
43 #include <libgen.h>
44 #include <unistd.h>
45 #include <assert.h>
46 #include <errno.h>
47 #include <pthread.h>
48 #include <pthread_np.h>
49 #include <sysexits.h>
50
51 #include <machine/vmm.h>
52 #include <vmmapi.h>
53
54 #include "bhyverun.h"
55 #include "acpi.h"
56 #include "inout.h"
57 #include "dbgport.h"
58 #include "ioapic.h"
59 #include "mem.h"
60 #include "mevent.h"
61 #include "mptbl.h"
62 #include "pci_emul.h"
63 #include "pci_irq.h"
64 #include "pci_lpc.h"
65 #include "smbiostbl.h"
66 #include "xmsr.h"
67 #include "spinup_ap.h"
68 #include "rtc.h"
69
70 #define GUEST_NIO_PORT 0x488 /* guest upcalls via i/o port */
71
72 #define MB (1024UL * 1024)
73 #define GB (1024UL * MB)
74
75 typedef int (*vmexit_handler_t)(struct vmctx *, struct vm_exit *, int *vcpu);
76 extern int vmexit_task_switch(struct vmctx *, struct vm_exit *, int *vcpu);
77
78 char *vmname;
79
80 int guest_ncpus;
81 char *guest_uuid_str;
82
83 static int guest_vmexit_on_hlt, guest_vmexit_on_pause;
84 static int virtio_msix = 1;
85 static int x2apic_mode = 0; /* default is xAPIC */
86
87 static int strictio;
88 static int strictmsr = 1;
89
90 static int acpi;
91
92 static char *progname;
93 static const int BSP = 0;
94
95 static cpuset_t cpumask;
96
97 static void vm_loop(struct vmctx *ctx, int vcpu, uint64_t rip);
98
99 static struct vm_exit vmexit[VM_MAXCPU];
100
101 struct bhyvestats {
102 uint64_t vmexit_bogus;
103 uint64_t vmexit_bogus_switch;
104 uint64_t vmexit_hlt;
105 uint64_t vmexit_pause;
106 uint64_t vmexit_mtrap;
107 uint64_t vmexit_inst_emul;
108 uint64_t cpu_switch_rotate;
109 uint64_t cpu_switch_direct;
110 } stats;
111
112 struct mt_vmm_info {
113 pthread_t mt_thr;
114 struct vmctx *mt_ctx;
115 int mt_vcpu;
116 } mt_vmm_info[VM_MAXCPU];
117
118 static cpuset_t *vcpumap[VM_MAXCPU] = { NULL };
119
120 static void
usage(int code)121 usage(int code)
122 {
123
124 fprintf(stderr,
125 "Usage: %s [-abehwxACHPWY] [-c vcpus] [-g <gdb port>] [-l <lpc>]\n"
126 " %*s [-m mem] [-p vcpu:hostcpu] [-s <pci>] [-U uuid] <vm>\n"
127 " -a: local apic is in xAPIC mode (deprecated)\n"
128 " -A: create ACPI tables\n"
129 " -c: # cpus (default 1)\n"
130 " -C: include guest memory in core file\n"
131 " -e: exit on unhandled I/O access\n"
132 " -g: gdb port\n"
133 " -h: help\n"
134 " -H: vmexit from the guest on hlt\n"
135 " -l: LPC device configuration\n"
136 " -m: memory size in MB\n"
137 " -p: pin 'vcpu' to 'hostcpu'\n"
138 " -P: vmexit from the guest on pause\n"
139 " -s: <slot,driver,configinfo> PCI slot config\n"
140 " -U: uuid\n"
141 " -w: ignore unimplemented MSRs\n"
142 " -W: force virtio to use single-vector MSI\n"
143 " -x: local apic is in x2APIC mode\n"
144 " -Y: disable MPtable generation\n",
145 progname, (int)strlen(progname), "");
146
147 exit(code);
148 }
149
150 static int
pincpu_parse(const char * opt)151 pincpu_parse(const char *opt)
152 {
153 int vcpu, pcpu;
154
155 if (sscanf(opt, "%d:%d", &vcpu, &pcpu) != 2) {
156 fprintf(stderr, "invalid format: %s\n", opt);
157 return (-1);
158 }
159
160 if (vcpu < 0 || vcpu >= VM_MAXCPU) {
161 fprintf(stderr, "vcpu '%d' outside valid range from 0 to %d\n",
162 vcpu, VM_MAXCPU - 1);
163 return (-1);
164 }
165
166 if (pcpu < 0 || pcpu >= CPU_SETSIZE) {
167 fprintf(stderr, "hostcpu '%d' outside valid range from "
168 "0 to %d\n", pcpu, CPU_SETSIZE - 1);
169 return (-1);
170 }
171
172 if (vcpumap[vcpu] == NULL) {
173 if ((vcpumap[vcpu] = malloc(sizeof(cpuset_t))) == NULL) {
174 perror("malloc");
175 return (-1);
176 }
177 CPU_ZERO(vcpumap[vcpu]);
178 }
179 CPU_SET(pcpu, vcpumap[vcpu]);
180 return (0);
181 }
182
183 void
vm_inject_fault(void * arg,int vcpu,int vector,int errcode_valid,int errcode)184 vm_inject_fault(void *arg, int vcpu, int vector, int errcode_valid,
185 int errcode)
186 {
187 struct vmctx *ctx;
188 int error;
189
190 ctx = arg;
191 if (errcode_valid)
192 error = vm_inject_exception2(ctx, vcpu, vector, errcode);
193 else
194 error = vm_inject_exception(ctx, vcpu, vector);
195 assert(error == 0);
196
197 /*
198 * Set the instruction length to 0 to ensure that the instruction is
199 * restarted when the fault handler returns.
200 */
201 vmexit[vcpu].inst_length = 0;
202 }
203
204 void *
paddr_guest2host(struct vmctx * ctx,uintptr_t gaddr,size_t len)205 paddr_guest2host(struct vmctx *ctx, uintptr_t gaddr, size_t len)
206 {
207
208 return (vm_map_gpa(ctx, gaddr, len));
209 }
210
211 int
fbsdrun_vmexit_on_pause(void)212 fbsdrun_vmexit_on_pause(void)
213 {
214
215 return (guest_vmexit_on_pause);
216 }
217
218 int
fbsdrun_vmexit_on_hlt(void)219 fbsdrun_vmexit_on_hlt(void)
220 {
221
222 return (guest_vmexit_on_hlt);
223 }
224
225 int
fbsdrun_virtio_msix(void)226 fbsdrun_virtio_msix(void)
227 {
228
229 return (virtio_msix);
230 }
231
232 static void *
fbsdrun_start_thread(void * param)233 fbsdrun_start_thread(void *param)
234 {
235 char tname[MAXCOMLEN + 1];
236 struct mt_vmm_info *mtp;
237 int vcpu;
238
239 mtp = param;
240 vcpu = mtp->mt_vcpu;
241
242 snprintf(tname, sizeof(tname), "vcpu %d", vcpu);
243 pthread_set_name_np(mtp->mt_thr, tname);
244
245 vm_loop(mtp->mt_ctx, vcpu, vmexit[vcpu].rip);
246
247 /* not reached */
248 exit(1);
249 return (NULL);
250 }
251
252 void
fbsdrun_addcpu(struct vmctx * ctx,int fromcpu,int newcpu,uint64_t rip)253 fbsdrun_addcpu(struct vmctx *ctx, int fromcpu, int newcpu, uint64_t rip)
254 {
255 int error;
256
257 assert(fromcpu == BSP);
258
259 /*
260 * The 'newcpu' must be activated in the context of 'fromcpu'. If
261 * vm_activate_cpu() is delayed until newcpu's pthread starts running
262 * then vmm.ko is out-of-sync with bhyve and this can create a race
263 * with vm_suspend().
264 */
265 error = vm_activate_cpu(ctx, newcpu);
266 assert(error == 0);
267
268 CPU_SET_ATOMIC(newcpu, &cpumask);
269
270 /*
271 * Set up the vmexit struct to allow execution to start
272 * at the given RIP
273 */
274 vmexit[newcpu].rip = rip;
275 vmexit[newcpu].inst_length = 0;
276
277 mt_vmm_info[newcpu].mt_ctx = ctx;
278 mt_vmm_info[newcpu].mt_vcpu = newcpu;
279
280 error = pthread_create(&mt_vmm_info[newcpu].mt_thr, NULL,
281 fbsdrun_start_thread, &mt_vmm_info[newcpu]);
282 assert(error == 0);
283 }
284
285 static int
fbsdrun_deletecpu(struct vmctx * ctx,int vcpu)286 fbsdrun_deletecpu(struct vmctx *ctx, int vcpu)
287 {
288
289 if (!CPU_ISSET(vcpu, &cpumask)) {
290 fprintf(stderr, "Attempting to delete unknown cpu %d\n", vcpu);
291 exit(1);
292 }
293
294 CPU_CLR_ATOMIC(vcpu, &cpumask);
295 return (CPU_EMPTY(&cpumask));
296 }
297
298 static int
vmexit_handle_notify(struct vmctx * ctx,struct vm_exit * vme,int * pvcpu,uint32_t eax)299 vmexit_handle_notify(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu,
300 uint32_t eax)
301 {
302 #if BHYVE_DEBUG
303 /*
304 * put guest-driven debug here
305 */
306 #endif
307 return (VMEXIT_CONTINUE);
308 }
309
310 static int
vmexit_inout(struct vmctx * ctx,struct vm_exit * vme,int * pvcpu)311 vmexit_inout(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
312 {
313 int error;
314 int bytes, port, in, out, string;
315 int vcpu;
316
317 vcpu = *pvcpu;
318
319 port = vme->u.inout.port;
320 bytes = vme->u.inout.bytes;
321 string = vme->u.inout.string;
322 in = vme->u.inout.in;
323 out = !in;
324
325 /* Extra-special case of host notifications */
326 if (out && port == GUEST_NIO_PORT) {
327 error = vmexit_handle_notify(ctx, vme, pvcpu, vme->u.inout.eax);
328 return (error);
329 }
330
331 error = emulate_inout(ctx, vcpu, vme, strictio);
332 if (!error && in && !string) {
333 error = vm_set_register(ctx, vcpu, VM_REG_GUEST_RAX,
334 vme->u.inout.eax);
335 assert(error == 0);
336 }
337
338 if (error) {
339 fprintf(stderr, "Unhandled %s%c 0x%04x\n", in ? "in" : "out",
340 bytes == 1 ? 'b' : (bytes == 2 ? 'w' : 'l'), port);
341 return (VMEXIT_ABORT);
342 } else {
343 return (VMEXIT_CONTINUE);
344 }
345 }
346
347 static int
vmexit_rdmsr(struct vmctx * ctx,struct vm_exit * vme,int * pvcpu)348 vmexit_rdmsr(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
349 {
350 uint64_t val;
351 uint32_t eax, edx;
352 int error;
353
354 val = 0;
355 error = emulate_rdmsr(ctx, *pvcpu, vme->u.msr.code, &val);
356 if (error != 0) {
357 fprintf(stderr, "rdmsr to register %#x on vcpu %d\n",
358 vme->u.msr.code, *pvcpu);
359 if (strictmsr) {
360 vm_inject_gp(ctx, *pvcpu);
361 return (VMEXIT_RESTART);
362 }
363 }
364
365 eax = val;
366 error = vm_set_register(ctx, *pvcpu, VM_REG_GUEST_RAX, eax);
367 assert(error == 0);
368
369 edx = val >> 32;
370 error = vm_set_register(ctx, *pvcpu, VM_REG_GUEST_RDX, edx);
371 assert(error == 0);
372
373 return (VMEXIT_CONTINUE);
374 }
375
376 static int
vmexit_wrmsr(struct vmctx * ctx,struct vm_exit * vme,int * pvcpu)377 vmexit_wrmsr(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
378 {
379 int error;
380
381 error = emulate_wrmsr(ctx, *pvcpu, vme->u.msr.code, vme->u.msr.wval);
382 if (error != 0) {
383 fprintf(stderr, "wrmsr to register %#x(%#lx) on vcpu %d\n",
384 vme->u.msr.code, vme->u.msr.wval, *pvcpu);
385 if (strictmsr) {
386 vm_inject_gp(ctx, *pvcpu);
387 return (VMEXIT_RESTART);
388 }
389 }
390 return (VMEXIT_CONTINUE);
391 }
392
393 static int
vmexit_spinup_ap(struct vmctx * ctx,struct vm_exit * vme,int * pvcpu)394 vmexit_spinup_ap(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
395 {
396 int newcpu;
397 int retval = VMEXIT_CONTINUE;
398
399 newcpu = spinup_ap(ctx, *pvcpu,
400 vme->u.spinup_ap.vcpu, vme->u.spinup_ap.rip);
401
402 return (retval);
403 }
404
405 #define DEBUG_EPT_MISCONFIG
406 #ifdef DEBUG_EPT_MISCONFIG
407 #define EXIT_REASON_EPT_MISCONFIG 49
408 #define VMCS_GUEST_PHYSICAL_ADDRESS 0x00002400
409 #define VMCS_IDENT(x) ((x) | 0x80000000)
410
411 static uint64_t ept_misconfig_gpa, ept_misconfig_pte[4];
412 static int ept_misconfig_ptenum;
413 #endif
414
415 static int
vmexit_vmx(struct vmctx * ctx,struct vm_exit * vmexit,int * pvcpu)416 vmexit_vmx(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
417 {
418
419 fprintf(stderr, "vm exit[%d]\n", *pvcpu);
420 fprintf(stderr, "\treason\t\tVMX\n");
421 fprintf(stderr, "\trip\t\t0x%016lx\n", vmexit->rip);
422 fprintf(stderr, "\tinst_length\t%d\n", vmexit->inst_length);
423 fprintf(stderr, "\tstatus\t\t%d\n", vmexit->u.vmx.status);
424 fprintf(stderr, "\texit_reason\t%u\n", vmexit->u.vmx.exit_reason);
425 fprintf(stderr, "\tqualification\t0x%016lx\n",
426 vmexit->u.vmx.exit_qualification);
427 fprintf(stderr, "\tinst_type\t\t%d\n", vmexit->u.vmx.inst_type);
428 fprintf(stderr, "\tinst_error\t\t%d\n", vmexit->u.vmx.inst_error);
429 #ifdef DEBUG_EPT_MISCONFIG
430 if (vmexit->u.vmx.exit_reason == EXIT_REASON_EPT_MISCONFIG) {
431 vm_get_register(ctx, *pvcpu,
432 VMCS_IDENT(VMCS_GUEST_PHYSICAL_ADDRESS),
433 &ept_misconfig_gpa);
434 vm_get_gpa_pmap(ctx, ept_misconfig_gpa, ept_misconfig_pte,
435 &ept_misconfig_ptenum);
436 fprintf(stderr, "\tEPT misconfiguration:\n");
437 fprintf(stderr, "\t\tGPA: %#lx\n", ept_misconfig_gpa);
438 fprintf(stderr, "\t\tPTE(%d): %#lx %#lx %#lx %#lx\n",
439 ept_misconfig_ptenum, ept_misconfig_pte[0],
440 ept_misconfig_pte[1], ept_misconfig_pte[2],
441 ept_misconfig_pte[3]);
442 }
443 #endif /* DEBUG_EPT_MISCONFIG */
444 return (VMEXIT_ABORT);
445 }
446
447 static int
vmexit_svm(struct vmctx * ctx,struct vm_exit * vmexit,int * pvcpu)448 vmexit_svm(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
449 {
450
451 fprintf(stderr, "vm exit[%d]\n", *pvcpu);
452 fprintf(stderr, "\treason\t\tSVM\n");
453 fprintf(stderr, "\trip\t\t0x%016lx\n", vmexit->rip);
454 fprintf(stderr, "\tinst_length\t%d\n", vmexit->inst_length);
455 fprintf(stderr, "\texitcode\t%#lx\n", vmexit->u.svm.exitcode);
456 fprintf(stderr, "\texitinfo1\t%#lx\n", vmexit->u.svm.exitinfo1);
457 fprintf(stderr, "\texitinfo2\t%#lx\n", vmexit->u.svm.exitinfo2);
458 return (VMEXIT_ABORT);
459 }
460
461 static int
vmexit_bogus(struct vmctx * ctx,struct vm_exit * vmexit,int * pvcpu)462 vmexit_bogus(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
463 {
464
465 stats.vmexit_bogus++;
466
467 return (VMEXIT_RESTART);
468 }
469
470 static int
vmexit_hlt(struct vmctx * ctx,struct vm_exit * vmexit,int * pvcpu)471 vmexit_hlt(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
472 {
473
474 stats.vmexit_hlt++;
475
476 /*
477 * Just continue execution with the next instruction. We use
478 * the HLT VM exit as a way to be friendly with the host
479 * scheduler.
480 */
481 return (VMEXIT_CONTINUE);
482 }
483
484 static int
vmexit_pause(struct vmctx * ctx,struct vm_exit * vmexit,int * pvcpu)485 vmexit_pause(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
486 {
487
488 stats.vmexit_pause++;
489
490 return (VMEXIT_CONTINUE);
491 }
492
493 static int
vmexit_mtrap(struct vmctx * ctx,struct vm_exit * vmexit,int * pvcpu)494 vmexit_mtrap(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
495 {
496
497 stats.vmexit_mtrap++;
498
499 return (VMEXIT_RESTART);
500 }
501
502 static int
vmexit_inst_emul(struct vmctx * ctx,struct vm_exit * vmexit,int * pvcpu)503 vmexit_inst_emul(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
504 {
505 int err;
506 stats.vmexit_inst_emul++;
507
508 err = emulate_mem(ctx, *pvcpu, vmexit->u.inst_emul.gpa,
509 &vmexit->u.inst_emul.vie, &vmexit->u.inst_emul.paging);
510
511 if (err) {
512 if (err == EINVAL) {
513 fprintf(stderr,
514 "Failed to emulate instruction at 0x%lx\n",
515 vmexit->rip);
516 } else if (err == ESRCH) {
517 fprintf(stderr, "Unhandled memory access to 0x%lx\n",
518 vmexit->u.inst_emul.gpa);
519 }
520
521 return (VMEXIT_ABORT);
522 }
523
524 return (VMEXIT_CONTINUE);
525 }
526
527 static pthread_mutex_t resetcpu_mtx = PTHREAD_MUTEX_INITIALIZER;
528 static pthread_cond_t resetcpu_cond = PTHREAD_COND_INITIALIZER;
529
530 static int
vmexit_suspend(struct vmctx * ctx,struct vm_exit * vmexit,int * pvcpu)531 vmexit_suspend(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
532 {
533 enum vm_suspend_how how;
534
535 how = vmexit->u.suspended.how;
536
537 fbsdrun_deletecpu(ctx, *pvcpu);
538
539 if (*pvcpu != BSP) {
540 pthread_mutex_lock(&resetcpu_mtx);
541 pthread_cond_signal(&resetcpu_cond);
542 pthread_mutex_unlock(&resetcpu_mtx);
543 pthread_exit(NULL);
544 }
545
546 pthread_mutex_lock(&resetcpu_mtx);
547 while (!CPU_EMPTY(&cpumask)) {
548 pthread_cond_wait(&resetcpu_cond, &resetcpu_mtx);
549 }
550 pthread_mutex_unlock(&resetcpu_mtx);
551
552 switch (how) {
553 case VM_SUSPEND_RESET:
554 exit(0);
555 case VM_SUSPEND_POWEROFF:
556 exit(1);
557 case VM_SUSPEND_HALT:
558 exit(2);
559 case VM_SUSPEND_TRIPLEFAULT:
560 exit(3);
561 default:
562 fprintf(stderr, "vmexit_suspend: invalid reason %d\n", how);
563 exit(100);
564 }
565 return (0); /* NOTREACHED */
566 }
567
568 static vmexit_handler_t handler[VM_EXITCODE_MAX] = {
569 [VM_EXITCODE_INOUT] = vmexit_inout,
570 [VM_EXITCODE_INOUT_STR] = vmexit_inout,
571 [VM_EXITCODE_VMX] = vmexit_vmx,
572 [VM_EXITCODE_SVM] = vmexit_svm,
573 [VM_EXITCODE_BOGUS] = vmexit_bogus,
574 [VM_EXITCODE_RDMSR] = vmexit_rdmsr,
575 [VM_EXITCODE_WRMSR] = vmexit_wrmsr,
576 [VM_EXITCODE_MTRAP] = vmexit_mtrap,
577 [VM_EXITCODE_INST_EMUL] = vmexit_inst_emul,
578 [VM_EXITCODE_SPINUP_AP] = vmexit_spinup_ap,
579 [VM_EXITCODE_SUSPENDED] = vmexit_suspend,
580 [VM_EXITCODE_TASK_SWITCH] = vmexit_task_switch,
581 };
582
583 static void
vm_loop(struct vmctx * ctx,int vcpu,uint64_t rip)584 vm_loop(struct vmctx *ctx, int vcpu, uint64_t rip)
585 {
586 int error, rc, prevcpu;
587 enum vm_exitcode exitcode;
588 cpuset_t active_cpus;
589
590 if (vcpumap[vcpu] != NULL) {
591 error = pthread_setaffinity_np(pthread_self(),
592 sizeof(cpuset_t), vcpumap[vcpu]);
593 assert(error == 0);
594 }
595
596 error = vm_active_cpus(ctx, &active_cpus);
597 assert(CPU_ISSET(vcpu, &active_cpus));
598
599 while (1) {
600 error = vm_run(ctx, vcpu, rip, &vmexit[vcpu]);
601 if (error != 0)
602 break;
603
604 prevcpu = vcpu;
605
606 exitcode = vmexit[vcpu].exitcode;
607 if (exitcode >= VM_EXITCODE_MAX || handler[exitcode] == NULL) {
608 fprintf(stderr, "vm_loop: unexpected exitcode 0x%x\n",
609 exitcode);
610 exit(1);
611 }
612
613 rc = (*handler[exitcode])(ctx, &vmexit[vcpu], &vcpu);
614
615 switch (rc) {
616 case VMEXIT_CONTINUE:
617 rip = vmexit[vcpu].rip + vmexit[vcpu].inst_length;
618 break;
619 case VMEXIT_RESTART:
620 rip = vmexit[vcpu].rip;
621 break;
622 case VMEXIT_ABORT:
623 abort();
624 default:
625 exit(1);
626 }
627 }
628 fprintf(stderr, "vm_run error %d, errno %d\n", error, errno);
629 }
630
631 static int
num_vcpus_allowed(struct vmctx * ctx)632 num_vcpus_allowed(struct vmctx *ctx)
633 {
634 int tmp, error;
635
636 error = vm_get_capability(ctx, BSP, VM_CAP_UNRESTRICTED_GUEST, &tmp);
637
638 /*
639 * The guest is allowed to spinup more than one processor only if the
640 * UNRESTRICTED_GUEST capability is available.
641 */
642 if (error == 0)
643 return (VM_MAXCPU);
644 else
645 return (1);
646 }
647
648 void
fbsdrun_set_capabilities(struct vmctx * ctx,int cpu)649 fbsdrun_set_capabilities(struct vmctx *ctx, int cpu)
650 {
651 int err, tmp;
652
653 if (fbsdrun_vmexit_on_hlt()) {
654 err = vm_get_capability(ctx, cpu, VM_CAP_HALT_EXIT, &tmp);
655 if (err < 0) {
656 fprintf(stderr, "VM exit on HLT not supported\n");
657 exit(1);
658 }
659 vm_set_capability(ctx, cpu, VM_CAP_HALT_EXIT, 1);
660 if (cpu == BSP)
661 handler[VM_EXITCODE_HLT] = vmexit_hlt;
662 }
663
664 if (fbsdrun_vmexit_on_pause()) {
665 /*
666 * pause exit support required for this mode
667 */
668 err = vm_get_capability(ctx, cpu, VM_CAP_PAUSE_EXIT, &tmp);
669 if (err < 0) {
670 fprintf(stderr,
671 "SMP mux requested, no pause support\n");
672 exit(1);
673 }
674 vm_set_capability(ctx, cpu, VM_CAP_PAUSE_EXIT, 1);
675 if (cpu == BSP)
676 handler[VM_EXITCODE_PAUSE] = vmexit_pause;
677 }
678
679 if (x2apic_mode)
680 err = vm_set_x2apic_state(ctx, cpu, X2APIC_ENABLED);
681 else
682 err = vm_set_x2apic_state(ctx, cpu, X2APIC_DISABLED);
683
684 if (err) {
685 fprintf(stderr, "Unable to set x2apic state (%d)\n", err);
686 exit(1);
687 }
688
689 vm_set_capability(ctx, cpu, VM_CAP_ENABLE_INVPCID, 1);
690 }
691
692 int
main(int argc,char * argv[])693 main(int argc, char *argv[])
694 {
695 int c, error, gdb_port, err, bvmcons;
696 int dump_guest_memory, max_vcpus, mptgen;
697 struct vmctx *ctx;
698 uint64_t rip;
699 size_t memsize;
700
701 bvmcons = 0;
702 dump_guest_memory = 0;
703 progname = basename(argv[0]);
704 gdb_port = 0;
705 guest_ncpus = 1;
706 memsize = 256 * MB;
707 mptgen = 1;
708
709 while ((c = getopt(argc, argv, "abehwxACHIPWYp:g:c:s:m:l:U:")) != -1) {
710 switch (c) {
711 case 'a':
712 x2apic_mode = 0;
713 break;
714 case 'A':
715 acpi = 1;
716 break;
717 case 'b':
718 bvmcons = 1;
719 break;
720 case 'p':
721 if (pincpu_parse(optarg) != 0) {
722 errx(EX_USAGE, "invalid vcpu pinning "
723 "configuration '%s'", optarg);
724 }
725 break;
726 case 'c':
727 guest_ncpus = atoi(optarg);
728 break;
729 case 'C':
730 dump_guest_memory = 1;
731 break;
732 case 'g':
733 gdb_port = atoi(optarg);
734 break;
735 case 'l':
736 if (lpc_device_parse(optarg) != 0) {
737 errx(EX_USAGE, "invalid lpc device "
738 "configuration '%s'", optarg);
739 }
740 break;
741 case 's':
742 if (pci_parse_slot(optarg) != 0)
743 exit(1);
744 else
745 break;
746 case 'm':
747 error = vm_parse_memsize(optarg, &memsize);
748 if (error)
749 errx(EX_USAGE, "invalid memsize '%s'", optarg);
750 break;
751 case 'H':
752 guest_vmexit_on_hlt = 1;
753 break;
754 case 'I':
755 /*
756 * The "-I" option was used to add an ioapic to the
757 * virtual machine.
758 *
759 * An ioapic is now provided unconditionally for each
760 * virtual machine and this option is now deprecated.
761 */
762 break;
763 case 'P':
764 guest_vmexit_on_pause = 1;
765 break;
766 case 'e':
767 strictio = 1;
768 break;
769 case 'U':
770 guest_uuid_str = optarg;
771 break;
772 case 'w':
773 strictmsr = 0;
774 break;
775 case 'W':
776 virtio_msix = 0;
777 break;
778 case 'x':
779 x2apic_mode = 1;
780 break;
781 case 'Y':
782 mptgen = 0;
783 break;
784 case 'h':
785 usage(0);
786 default:
787 usage(1);
788 }
789 }
790 argc -= optind;
791 argv += optind;
792
793 if (argc != 1)
794 usage(1);
795
796 vmname = argv[0];
797
798 ctx = vm_open(vmname);
799 if (ctx == NULL) {
800 perror("vm_open");
801 exit(1);
802 }
803
804 max_vcpus = num_vcpus_allowed(ctx);
805 if (guest_ncpus > max_vcpus) {
806 fprintf(stderr, "%d vCPUs requested but only %d available\n",
807 guest_ncpus, max_vcpus);
808 exit(1);
809 }
810
811 fbsdrun_set_capabilities(ctx, BSP);
812
813 if (dump_guest_memory)
814 vm_set_memflags(ctx, VM_MEM_F_INCORE);
815 err = vm_setup_memory(ctx, memsize, VM_MMAP_ALL);
816 if (err) {
817 fprintf(stderr, "Unable to setup memory (%d)\n", err);
818 exit(1);
819 }
820
821 error = init_msr();
822 if (error) {
823 fprintf(stderr, "init_msr error %d", error);
824 exit(1);
825 }
826
827 init_mem();
828 init_inout();
829 pci_irq_init(ctx);
830 ioapic_init(ctx);
831
832 rtc_init(ctx);
833 sci_init(ctx);
834
835 /*
836 * Exit if a device emulation finds an error in it's initilization
837 */
838 if (init_pci(ctx) != 0)
839 exit(1);
840
841 if (gdb_port != 0)
842 init_dbgport(gdb_port);
843
844 if (bvmcons)
845 init_bvmcons();
846
847 error = vm_get_register(ctx, BSP, VM_REG_GUEST_RIP, &rip);
848 assert(error == 0);
849
850 /*
851 * build the guest tables, MP etc.
852 */
853 if (mptgen) {
854 error = mptable_build(ctx, guest_ncpus);
855 if (error)
856 exit(1);
857 }
858
859 error = smbios_build(ctx);
860 assert(error == 0);
861
862 if (acpi) {
863 error = acpi_build(ctx, guest_ncpus);
864 assert(error == 0);
865 }
866
867 /*
868 * Change the proc title to include the VM name.
869 */
870 setproctitle("%s", vmname);
871
872 /*
873 * Add CPU 0
874 */
875 fbsdrun_addcpu(ctx, BSP, BSP, rip);
876
877 /*
878 * Head off to the main event dispatch loop
879 */
880 mevent_dispatch();
881
882 exit(1);
883 }
884