bhyverun.c revision 270070 
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/usr.sbin/bhyve/bhyverun.c 270070 2014-08-17 00:52:07Z grehan $
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: stable/10/usr.sbin/bhyve/bhyverun.c 270070 2014-08-17 00:52:07Z grehan $");
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	VMEXIT_CONTINUE		1	/* continue from next instruction */
73#define	VMEXIT_RESTART		2	/* restart current instruction */
74#define	VMEXIT_ABORT		3	/* abort the vm run loop */
75#define	VMEXIT_RESET		4	/* guest machine has reset */
76#define	VMEXIT_POWEROFF		5	/* guest machine has powered off */
77
78#define MB		(1024UL * 1024)
79#define GB		(1024UL * MB)
80
81typedef int (*vmexit_handler_t)(struct vmctx *, struct vm_exit *, int *vcpu);
82
83char *vmname;
84
85int guest_ncpus;
86char *guest_uuid_str;
87
88static int guest_vmexit_on_hlt, guest_vmexit_on_pause;
89static int virtio_msix = 1;
90static int x2apic_mode = 0;	/* default is xAPIC */
91
92static int strictio;
93static int strictmsr = 1;
94
95static int acpi;
96
97static char *progname;
98static const int BSP = 0;
99
100static cpuset_t cpumask;
101
102static void vm_loop(struct vmctx *ctx, int vcpu, uint64_t rip);
103
104struct vm_exit vmexit[VM_MAXCPU];
105
106struct bhyvestats {
107        uint64_t        vmexit_bogus;
108        uint64_t        vmexit_bogus_switch;
109        uint64_t        vmexit_hlt;
110        uint64_t        vmexit_pause;
111        uint64_t        vmexit_mtrap;
112        uint64_t        vmexit_inst_emul;
113        uint64_t        cpu_switch_rotate;
114        uint64_t        cpu_switch_direct;
115        int             io_reset;
116	int		io_poweroff;
117} stats;
118
119struct mt_vmm_info {
120	pthread_t	mt_thr;
121	struct vmctx	*mt_ctx;
122	int		mt_vcpu;
123} mt_vmm_info[VM_MAXCPU];
124
125static cpuset_t *vcpumap[VM_MAXCPU] = { NULL };
126
127static void
128usage(int code)
129{
130
131        fprintf(stderr,
132                "Usage: %s [-aehwAHIPW] [-g <gdb port>] [-s <pci>] [-c vcpus]\n"
133		"       %*s [-p vcpu:hostcpu] [-m mem] [-l <lpc>] <vm>\n"
134		"       -a: local apic is in xAPIC mode (deprecated)\n"
135		"       -A: create an ACPI table\n"
136		"       -g: gdb port\n"
137		"       -c: # cpus (default 1)\n"
138		"       -C: include guest memory in core file\n"
139		"       -p: pin 'vcpu' to 'hostcpu'\n"
140		"       -H: vmexit from the guest on hlt\n"
141		"       -P: vmexit from the guest on pause\n"
142		"       -W: force virtio to use single-vector MSI\n"
143		"       -e: exit on unhandled I/O access\n"
144		"       -h: help\n"
145		"       -s: <slot,driver,configinfo> PCI slot config\n"
146		"       -l: LPC device configuration\n"
147		"       -m: memory size in MB\n"
148		"       -w: ignore unimplemented MSRs\n"
149		"       -x: local apic is in x2APIC mode\n"
150		"       -Y: disable MPtable generation\n"
151		"       -U: uuid\n",
152		progname, (int)strlen(progname), "");
153
154	exit(code);
155}
156
157static int
158pincpu_parse(const char *opt)
159{
160	int vcpu, pcpu;
161
162	if (sscanf(opt, "%d:%d", &vcpu, &pcpu) != 2) {
163		fprintf(stderr, "invalid format: %s\n", opt);
164		return (-1);
165	}
166
167	if (vcpu < 0 || vcpu >= VM_MAXCPU) {
168		fprintf(stderr, "vcpu '%d' outside valid range from 0 to %d\n",
169		    vcpu, VM_MAXCPU - 1);
170		return (-1);
171	}
172
173	if (pcpu < 0 || pcpu >= CPU_SETSIZE) {
174		fprintf(stderr, "hostcpu '%d' outside valid range from "
175		    "0 to %d\n", pcpu, CPU_SETSIZE - 1);
176		return (-1);
177	}
178
179	if (vcpumap[vcpu] == NULL) {
180		if ((vcpumap[vcpu] = malloc(sizeof(cpuset_t))) == NULL) {
181			perror("malloc");
182			return (-1);
183		}
184		CPU_ZERO(vcpumap[vcpu]);
185	}
186	CPU_SET(pcpu, vcpumap[vcpu]);
187	return (0);
188}
189
190void *
191paddr_guest2host(struct vmctx *ctx, uintptr_t gaddr, size_t len)
192{
193
194	return (vm_map_gpa(ctx, gaddr, len));
195}
196
197int
198fbsdrun_vmexit_on_pause(void)
199{
200
201	return (guest_vmexit_on_pause);
202}
203
204int
205fbsdrun_vmexit_on_hlt(void)
206{
207
208	return (guest_vmexit_on_hlt);
209}
210
211int
212fbsdrun_virtio_msix(void)
213{
214
215	return (virtio_msix);
216}
217
218static void *
219fbsdrun_start_thread(void *param)
220{
221	char tname[MAXCOMLEN + 1];
222	struct mt_vmm_info *mtp;
223	int vcpu;
224
225	mtp = param;
226	vcpu = mtp->mt_vcpu;
227
228	snprintf(tname, sizeof(tname), "vcpu %d", vcpu);
229	pthread_set_name_np(mtp->mt_thr, tname);
230
231	vm_loop(mtp->mt_ctx, vcpu, vmexit[vcpu].rip);
232
233	/* not reached */
234	exit(1);
235	return (NULL);
236}
237
238void
239fbsdrun_addcpu(struct vmctx *ctx, int fromcpu, int newcpu, uint64_t rip)
240{
241	int error;
242
243	assert(fromcpu == BSP);
244
245	/*
246	 * The 'newcpu' must be activated in the context of 'fromcpu'. If
247	 * vm_activate_cpu() is delayed until newcpu's pthread starts running
248	 * then vmm.ko is out-of-sync with bhyve and this can create a race
249	 * with vm_suspend().
250	 */
251	error = vm_activate_cpu(ctx, newcpu);
252	assert(error == 0);
253
254	CPU_SET_ATOMIC(newcpu, &cpumask);
255
256	/*
257	 * Set up the vmexit struct to allow execution to start
258	 * at the given RIP
259	 */
260	vmexit[newcpu].rip = rip;
261	vmexit[newcpu].inst_length = 0;
262
263	mt_vmm_info[newcpu].mt_ctx = ctx;
264	mt_vmm_info[newcpu].mt_vcpu = newcpu;
265
266	error = pthread_create(&mt_vmm_info[newcpu].mt_thr, NULL,
267	    fbsdrun_start_thread, &mt_vmm_info[newcpu]);
268	assert(error == 0);
269}
270
271static int
272fbsdrun_deletecpu(struct vmctx *ctx, int vcpu)
273{
274
275	if (!CPU_ISSET(vcpu, &cpumask)) {
276		fprintf(stderr, "Attempting to delete unknown cpu %d\n", vcpu);
277		exit(1);
278	}
279
280	CPU_CLR_ATOMIC(vcpu, &cpumask);
281	return (CPU_EMPTY(&cpumask));
282}
283
284static int
285vmexit_handle_notify(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu,
286		     uint32_t eax)
287{
288#if BHYVE_DEBUG
289	/*
290	 * put guest-driven debug here
291	 */
292#endif
293        return (VMEXIT_CONTINUE);
294}
295
296static int
297vmexit_inout(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
298{
299	int error;
300	int bytes, port, in, out, string;
301	int vcpu;
302
303	vcpu = *pvcpu;
304
305	port = vme->u.inout.port;
306	bytes = vme->u.inout.bytes;
307	string = vme->u.inout.string;
308	in = vme->u.inout.in;
309	out = !in;
310
311        /* Extra-special case of host notifications */
312        if (out && port == GUEST_NIO_PORT) {
313                error = vmexit_handle_notify(ctx, vme, pvcpu, vme->u.inout.eax);
314		return (error);
315	}
316
317	error = emulate_inout(ctx, vcpu, vme, strictio);
318	if (error == INOUT_OK && in && !string) {
319		error = vm_set_register(ctx, vcpu, VM_REG_GUEST_RAX,
320		    vme->u.inout.eax);
321	}
322
323	switch (error) {
324	case INOUT_OK:
325		return (VMEXIT_CONTINUE);
326	case INOUT_RESTART:
327		return (VMEXIT_RESTART);
328	case INOUT_RESET:
329		stats.io_reset++;
330		return (VMEXIT_RESET);
331	case INOUT_POWEROFF:
332		stats.io_poweroff++;
333		return (VMEXIT_POWEROFF);
334	default:
335		fprintf(stderr, "Unhandled %s%c 0x%04x\n",
336			in ? "in" : "out",
337			bytes == 1 ? 'b' : (bytes == 2 ? 'w' : 'l'), port);
338		return (VMEXIT_ABORT);
339	}
340}
341
342static int
343vmexit_rdmsr(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
344{
345	uint64_t val;
346	uint32_t eax, edx;
347	int error;
348
349	val = 0;
350	error = emulate_rdmsr(ctx, *pvcpu, vme->u.msr.code, &val);
351	if (error != 0) {
352		fprintf(stderr, "rdmsr to register %#x on vcpu %d\n",
353		    vme->u.msr.code, *pvcpu);
354		if (strictmsr) {
355			error = vm_inject_exception2(ctx, *pvcpu, IDT_GP, 0);
356			assert(error == 0);
357			return (VMEXIT_RESTART);
358		}
359	}
360
361	eax = val;
362	error = vm_set_register(ctx, *pvcpu, VM_REG_GUEST_RAX, eax);
363	assert(error == 0);
364
365	edx = val >> 32;
366	error = vm_set_register(ctx, *pvcpu, VM_REG_GUEST_RDX, edx);
367	assert(error == 0);
368
369	return (VMEXIT_CONTINUE);
370}
371
372static int
373vmexit_wrmsr(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
374{
375	int error;
376
377	error = emulate_wrmsr(ctx, *pvcpu, vme->u.msr.code, vme->u.msr.wval);
378	if (error != 0) {
379		fprintf(stderr, "wrmsr to register %#x(%#lx) on vcpu %d\n",
380		    vme->u.msr.code, vme->u.msr.wval, *pvcpu);
381		if (strictmsr) {
382			error = vm_inject_exception2(ctx, *pvcpu, IDT_GP, 0);
383			assert(error == 0);
384			return (VMEXIT_RESTART);
385		}
386	}
387	return (VMEXIT_CONTINUE);
388}
389
390static int
391vmexit_spinup_ap(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
392{
393	int newcpu;
394	int retval = VMEXIT_CONTINUE;
395
396	newcpu = spinup_ap(ctx, *pvcpu,
397			   vme->u.spinup_ap.vcpu, vme->u.spinup_ap.rip);
398
399	return (retval);
400}
401
402static int
403vmexit_vmx(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
404{
405
406	fprintf(stderr, "vm exit[%d]\n", *pvcpu);
407	fprintf(stderr, "\treason\t\tVMX\n");
408	fprintf(stderr, "\trip\t\t0x%016lx\n", vmexit->rip);
409	fprintf(stderr, "\tinst_length\t%d\n", vmexit->inst_length);
410	fprintf(stderr, "\tstatus\t\t%d\n", vmexit->u.vmx.status);
411	fprintf(stderr, "\texit_reason\t%u\n", vmexit->u.vmx.exit_reason);
412	fprintf(stderr, "\tqualification\t0x%016lx\n",
413	    vmexit->u.vmx.exit_qualification);
414	fprintf(stderr, "\tinst_type\t\t%d\n", vmexit->u.vmx.inst_type);
415	fprintf(stderr, "\tinst_error\t\t%d\n", vmexit->u.vmx.inst_error);
416
417	return (VMEXIT_ABORT);
418}
419
420static int
421vmexit_bogus(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
422{
423
424	stats.vmexit_bogus++;
425
426	return (VMEXIT_RESTART);
427}
428
429static int
430vmexit_hlt(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
431{
432
433	stats.vmexit_hlt++;
434
435	/*
436	 * Just continue execution with the next instruction. We use
437	 * the HLT VM exit as a way to be friendly with the host
438	 * scheduler.
439	 */
440	return (VMEXIT_CONTINUE);
441}
442
443static int
444vmexit_pause(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
445{
446
447	stats.vmexit_pause++;
448
449	return (VMEXIT_CONTINUE);
450}
451
452static int
453vmexit_mtrap(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
454{
455
456	stats.vmexit_mtrap++;
457
458	return (VMEXIT_RESTART);
459}
460
461static int
462vmexit_inst_emul(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
463{
464	int err;
465	stats.vmexit_inst_emul++;
466
467	err = emulate_mem(ctx, *pvcpu, vmexit->u.inst_emul.gpa,
468			  &vmexit->u.inst_emul.vie);
469
470	if (err) {
471		if (err == EINVAL) {
472			fprintf(stderr,
473			    "Failed to emulate instruction at 0x%lx\n",
474			    vmexit->rip);
475		} else if (err == ESRCH) {
476			fprintf(stderr, "Unhandled memory access to 0x%lx\n",
477			    vmexit->u.inst_emul.gpa);
478		}
479
480		return (VMEXIT_ABORT);
481	}
482
483	return (VMEXIT_CONTINUE);
484}
485
486static pthread_mutex_t resetcpu_mtx = PTHREAD_MUTEX_INITIALIZER;
487static pthread_cond_t resetcpu_cond = PTHREAD_COND_INITIALIZER;
488
489static int
490vmexit_suspend(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
491{
492	enum vm_suspend_how how;
493
494	how = vmexit->u.suspended.how;
495
496	fbsdrun_deletecpu(ctx, *pvcpu);
497
498	if (*pvcpu != BSP) {
499		pthread_mutex_lock(&resetcpu_mtx);
500		pthread_cond_signal(&resetcpu_cond);
501		pthread_mutex_unlock(&resetcpu_mtx);
502		pthread_exit(NULL);
503	}
504
505	pthread_mutex_lock(&resetcpu_mtx);
506	while (!CPU_EMPTY(&cpumask)) {
507		pthread_cond_wait(&resetcpu_cond, &resetcpu_mtx);
508	}
509	pthread_mutex_unlock(&resetcpu_mtx);
510
511	switch (how) {
512	case VM_SUSPEND_RESET:
513		exit(0);
514	case VM_SUSPEND_POWEROFF:
515		exit(1);
516	case VM_SUSPEND_HALT:
517		exit(2);
518	default:
519		fprintf(stderr, "vmexit_suspend: invalid reason %d\n", how);
520		exit(100);
521	}
522	return (0);	/* NOTREACHED */
523}
524
525static vmexit_handler_t handler[VM_EXITCODE_MAX] = {
526	[VM_EXITCODE_INOUT]  = vmexit_inout,
527	[VM_EXITCODE_INOUT_STR]  = vmexit_inout,
528	[VM_EXITCODE_VMX]    = vmexit_vmx,
529	[VM_EXITCODE_BOGUS]  = vmexit_bogus,
530	[VM_EXITCODE_RDMSR]  = vmexit_rdmsr,
531	[VM_EXITCODE_WRMSR]  = vmexit_wrmsr,
532	[VM_EXITCODE_MTRAP]  = vmexit_mtrap,
533	[VM_EXITCODE_INST_EMUL] = vmexit_inst_emul,
534	[VM_EXITCODE_SPINUP_AP] = vmexit_spinup_ap,
535	[VM_EXITCODE_SUSPENDED] = vmexit_suspend
536};
537
538static void
539vm_loop(struct vmctx *ctx, int vcpu, uint64_t rip)
540{
541	int error, rc, prevcpu;
542	enum vm_exitcode exitcode;
543	enum vm_suspend_how how;
544	cpuset_t active_cpus;
545
546	if (vcpumap[vcpu] != NULL) {
547		error = pthread_setaffinity_np(pthread_self(),
548		    sizeof(cpuset_t), vcpumap[vcpu]);
549		assert(error == 0);
550	}
551
552	error = vm_active_cpus(ctx, &active_cpus);
553	assert(CPU_ISSET(vcpu, &active_cpus));
554
555	while (1) {
556		error = vm_run(ctx, vcpu, rip, &vmexit[vcpu]);
557		if (error != 0)
558			break;
559
560		prevcpu = vcpu;
561
562		exitcode = vmexit[vcpu].exitcode;
563		if (exitcode >= VM_EXITCODE_MAX || handler[exitcode] == NULL) {
564			fprintf(stderr, "vm_loop: unexpected exitcode 0x%x\n",
565			    exitcode);
566			exit(1);
567		}
568
569                rc = (*handler[exitcode])(ctx, &vmexit[vcpu], &vcpu);
570
571		switch (rc) {
572		case VMEXIT_CONTINUE:
573                        rip = vmexit[vcpu].rip + vmexit[vcpu].inst_length;
574			break;
575		case VMEXIT_RESTART:
576                        rip = vmexit[vcpu].rip;
577			break;
578		case VMEXIT_RESET:
579		case VMEXIT_POWEROFF:
580			if (rc == VMEXIT_RESET)
581				how = VM_SUSPEND_RESET;
582			else
583				how = VM_SUSPEND_POWEROFF;
584			error = vm_suspend(ctx, how);
585			assert(error == 0 || errno == EALREADY);
586                        rip = vmexit[vcpu].rip + vmexit[vcpu].inst_length;
587			break;
588		case VMEXIT_ABORT:
589			abort();
590		default:
591			exit(1);
592		}
593	}
594	fprintf(stderr, "vm_run error %d, errno %d\n", error, errno);
595}
596
597static int
598num_vcpus_allowed(struct vmctx *ctx)
599{
600	int tmp, error;
601
602	error = vm_get_capability(ctx, BSP, VM_CAP_UNRESTRICTED_GUEST, &tmp);
603
604	/*
605	 * The guest is allowed to spinup more than one processor only if the
606	 * UNRESTRICTED_GUEST capability is available.
607	 */
608	if (error == 0)
609		return (VM_MAXCPU);
610	else
611		return (1);
612}
613
614void
615fbsdrun_set_capabilities(struct vmctx *ctx, int cpu)
616{
617	int err, tmp;
618
619	if (fbsdrun_vmexit_on_hlt()) {
620		err = vm_get_capability(ctx, cpu, VM_CAP_HALT_EXIT, &tmp);
621		if (err < 0) {
622			fprintf(stderr, "VM exit on HLT not supported\n");
623			exit(1);
624		}
625		vm_set_capability(ctx, cpu, VM_CAP_HALT_EXIT, 1);
626		if (cpu == BSP)
627			handler[VM_EXITCODE_HLT] = vmexit_hlt;
628	}
629
630        if (fbsdrun_vmexit_on_pause()) {
631		/*
632		 * pause exit support required for this mode
633		 */
634		err = vm_get_capability(ctx, cpu, VM_CAP_PAUSE_EXIT, &tmp);
635		if (err < 0) {
636			fprintf(stderr,
637			    "SMP mux requested, no pause support\n");
638			exit(1);
639		}
640		vm_set_capability(ctx, cpu, VM_CAP_PAUSE_EXIT, 1);
641		if (cpu == BSP)
642			handler[VM_EXITCODE_PAUSE] = vmexit_pause;
643        }
644
645	if (x2apic_mode)
646		err = vm_set_x2apic_state(ctx, cpu, X2APIC_ENABLED);
647	else
648		err = vm_set_x2apic_state(ctx, cpu, X2APIC_DISABLED);
649
650	if (err) {
651		fprintf(stderr, "Unable to set x2apic state (%d)\n", err);
652		exit(1);
653	}
654
655	vm_set_capability(ctx, cpu, VM_CAP_ENABLE_INVPCID, 1);
656}
657
658int
659main(int argc, char *argv[])
660{
661	int c, error, gdb_port, err, bvmcons;
662	int dump_guest_memory, max_vcpus, mptgen;
663	struct vmctx *ctx;
664	uint64_t rip;
665	size_t memsize;
666
667	bvmcons = 0;
668	dump_guest_memory = 0;
669	progname = basename(argv[0]);
670	gdb_port = 0;
671	guest_ncpus = 1;
672	memsize = 256 * MB;
673	mptgen = 1;
674
675	while ((c = getopt(argc, argv, "abehwxACHIPWYp:g:c:s:m:l:U:")) != -1) {
676		switch (c) {
677		case 'a':
678			x2apic_mode = 0;
679			break;
680		case 'A':
681			acpi = 1;
682			break;
683		case 'b':
684			bvmcons = 1;
685			break;
686		case 'p':
687                        if (pincpu_parse(optarg) != 0) {
688                            errx(EX_USAGE, "invalid vcpu pinning "
689                                 "configuration '%s'", optarg);
690                        }
691			break;
692                case 'c':
693			guest_ncpus = atoi(optarg);
694			break;
695		case 'C':
696			dump_guest_memory = 1;
697			break;
698		case 'g':
699			gdb_port = atoi(optarg);
700			break;
701		case 'l':
702			if (lpc_device_parse(optarg) != 0) {
703				errx(EX_USAGE, "invalid lpc device "
704				    "configuration '%s'", optarg);
705			}
706			break;
707		case 's':
708			if (pci_parse_slot(optarg) != 0)
709				exit(1);
710			else
711				break;
712                case 'm':
713			error = vm_parse_memsize(optarg, &memsize);
714			if (error)
715				errx(EX_USAGE, "invalid memsize '%s'", optarg);
716			break;
717		case 'H':
718			guest_vmexit_on_hlt = 1;
719			break;
720		case 'I':
721			/*
722			 * The "-I" option was used to add an ioapic to the
723			 * virtual machine.
724			 *
725			 * An ioapic is now provided unconditionally for each
726			 * virtual machine and this option is now deprecated.
727			 */
728			break;
729		case 'P':
730			guest_vmexit_on_pause = 1;
731			break;
732		case 'e':
733			strictio = 1;
734			break;
735		case 'U':
736			guest_uuid_str = optarg;
737			break;
738		case 'w':
739			strictmsr = 0;
740			break;
741		case 'W':
742			virtio_msix = 0;
743			break;
744		case 'x':
745			x2apic_mode = 1;
746			break;
747		case 'Y':
748			mptgen = 0;
749			break;
750		case 'h':
751			usage(0);
752		default:
753			usage(1);
754		}
755	}
756	argc -= optind;
757	argv += optind;
758
759	if (argc != 1)
760		usage(1);
761
762	vmname = argv[0];
763
764	ctx = vm_open(vmname);
765	if (ctx == NULL) {
766		perror("vm_open");
767		exit(1);
768	}
769
770	max_vcpus = num_vcpus_allowed(ctx);
771	if (guest_ncpus > max_vcpus) {
772		fprintf(stderr, "%d vCPUs requested but only %d available\n",
773			guest_ncpus, max_vcpus);
774		exit(1);
775	}
776
777	fbsdrun_set_capabilities(ctx, BSP);
778
779	if (dump_guest_memory)
780		vm_set_memflags(ctx, VM_MEM_F_INCORE);
781	err = vm_setup_memory(ctx, memsize, VM_MMAP_ALL);
782	if (err) {
783		fprintf(stderr, "Unable to setup memory (%d)\n", err);
784		exit(1);
785	}
786
787	init_mem();
788	init_inout();
789	pci_irq_init(ctx);
790	ioapic_init(ctx);
791
792	rtc_init(ctx);
793	sci_init(ctx);
794
795	/*
796	 * Exit if a device emulation finds an error in it's initilization
797	 */
798	if (init_pci(ctx) != 0)
799		exit(1);
800
801	if (gdb_port != 0)
802		init_dbgport(gdb_port);
803
804	if (bvmcons)
805		init_bvmcons();
806
807	error = vm_get_register(ctx, BSP, VM_REG_GUEST_RIP, &rip);
808	assert(error == 0);
809
810	/*
811	 * build the guest tables, MP etc.
812	 */
813	if (mptgen) {
814		error = mptable_build(ctx, guest_ncpus);
815		if (error)
816			exit(1);
817	}
818
819	error = smbios_build(ctx);
820	assert(error == 0);
821
822	if (acpi) {
823		error = acpi_build(ctx, guest_ncpus);
824		assert(error == 0);
825	}
826
827	/*
828	 * Change the proc title to include the VM name.
829	 */
830	setproctitle("%s", vmname);
831
832	/*
833	 * Add CPU 0
834	 */
835	fbsdrun_addcpu(ctx, BSP, BSP, rip);
836
837	/*
838	 * Head off to the main event dispatch loop
839	 */
840	mevent_dispatch();
841
842	exit(1);
843}
844