bhyverun.c revision 247523 
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: head/usr.sbin/bhyve/bhyverun.c 247523 2013-03-01 02:26:28Z neel $
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: head/usr.sbin/bhyve/bhyverun.c 247523 2013-03-01 02:26:28Z neel $");
31
32#include <sys/types.h>
33#include <sys/mman.h>
34#include <sys/time.h>
35
36#include <machine/segments.h>
37
38#include <stdio.h>
39#include <stdlib.h>
40#include <libgen.h>
41#include <unistd.h>
42#include <assert.h>
43#include <errno.h>
44#include <signal.h>
45#include <pthread.h>
46#include <pthread_np.h>
47
48#include <machine/vmm.h>
49#include <vmmapi.h>
50
51#include "bhyverun.h"
52#include "acpi.h"
53#include "inout.h"
54#include "dbgport.h"
55#include "mem.h"
56#include "mevent.h"
57#include "mptbl.h"
58#include "pci_emul.h"
59#include "xmsr.h"
60#include "ioapic.h"
61#include "spinup_ap.h"
62
63#define	DEFAULT_GUEST_HZ	100
64#define	DEFAULT_GUEST_TSLICE	200
65
66#define GUEST_NIO_PORT		0x488	/* guest upcalls via i/o port */
67
68#define	VMEXIT_SWITCH		0	/* force vcpu switch in mux mode */
69#define	VMEXIT_CONTINUE		1	/* continue from next instruction */
70#define	VMEXIT_RESTART		2	/* restart current instruction */
71#define	VMEXIT_ABORT		3	/* abort the vm run loop */
72#define	VMEXIT_RESET		4	/* guest machine has reset */
73
74#define MB		(1024UL * 1024)
75#define GB		(1024UL * MB)
76
77typedef int (*vmexit_handler_t)(struct vmctx *, struct vm_exit *, int *vcpu);
78
79int guest_tslice = DEFAULT_GUEST_TSLICE;
80int guest_hz = DEFAULT_GUEST_HZ;
81char *vmname;
82
83u_long lomem_sz;
84u_long himem_sz;
85
86int guest_ncpus;
87
88static int pincpu = -1;
89static int guest_vcpu_mux;
90static int guest_vmexit_on_hlt, guest_vmexit_on_pause, disable_x2apic;
91
92static int foundcpus;
93
94static int strictio;
95
96static int acpi;
97
98static char *lomem_addr;
99static char *himem_addr;
100
101static char *progname;
102static const int BSP = 0;
103
104static int cpumask;
105
106static void vm_loop(struct vmctx *ctx, int vcpu, uint64_t rip);
107
108struct vm_exit vmexit[VM_MAXCPU];
109
110struct fbsdstats {
111        uint64_t        vmexit_bogus;
112        uint64_t        vmexit_bogus_switch;
113        uint64_t        vmexit_hlt;
114        uint64_t        vmexit_pause;
115        uint64_t        vmexit_mtrap;
116        uint64_t        vmexit_paging;
117        uint64_t        cpu_switch_rotate;
118        uint64_t        cpu_switch_direct;
119        int             io_reset;
120} stats;
121
122struct mt_vmm_info {
123	pthread_t	mt_thr;
124	struct vmctx	*mt_ctx;
125	int		mt_vcpu;
126} mt_vmm_info[VM_MAXCPU];
127
128static void
129usage(int code)
130{
131
132        fprintf(stderr,
133                "Usage: %s [-aehABHIP][-g <gdb port>][-z <hz>][-s <pci>]"
134		"[-S <pci>][-p pincpu][-n <pci>][-m lowmem][-M highmem]"
135		" <vmname>\n"
136		"       -a: local apic is in XAPIC mode (default is X2APIC)\n"
137		"       -A: create an ACPI table\n"
138		"       -g: gdb port (default is %d and 0 means don't open)\n"
139		"       -c: # cpus (default 1)\n"
140		"       -p: pin vcpu 'n' to host cpu 'pincpu + n'\n"
141		"       -B: inject breakpoint exception on vm entry\n"
142		"       -H: vmexit from the guest on hlt\n"
143		"       -I: present an ioapic to the guest\n"
144		"       -P: vmexit from the guest on pause\n"
145		"	-e: exit on unhandled i/o access\n"
146		"       -h: help\n"
147		"       -z: guest hz (default is %d)\n"
148		"       -s: <slot,driver,configinfo> PCI slot config\n"
149		"       -S: <slot,driver,configinfo> legacy PCI slot config\n"
150		"       -m: lowmem in MB\n"
151		"       -M: highmem in MB\n"
152		"       -x: mux vcpus to 1 hcpu\n"
153		"       -t: mux vcpu timeslice hz (default %d)\n",
154		progname, DEFAULT_GDB_PORT, DEFAULT_GUEST_HZ,
155		DEFAULT_GUEST_TSLICE);
156	exit(code);
157}
158
159void *
160paddr_guest2host(uintptr_t gaddr, size_t len)
161{
162
163	if (gaddr < lomem_sz && gaddr + len <= lomem_sz)
164		return ((void *)(lomem_addr + gaddr));
165
166	if (gaddr >= 4*GB) {
167		gaddr -= 4*GB;
168		if (gaddr < himem_sz && gaddr + len <= himem_sz)
169			return ((void *)(himem_addr + gaddr));
170	}
171
172	return (NULL);
173}
174
175int
176fbsdrun_disable_x2apic(void)
177{
178
179	return (disable_x2apic);
180}
181
182int
183fbsdrun_vmexit_on_pause(void)
184{
185
186	return (guest_vmexit_on_pause);
187}
188
189int
190fbsdrun_vmexit_on_hlt(void)
191{
192
193	return (guest_vmexit_on_hlt);
194}
195
196int
197fbsdrun_muxed(void)
198{
199
200	return (guest_vcpu_mux);
201}
202
203static void *
204fbsdrun_start_thread(void *param)
205{
206	char tname[MAXCOMLEN + 1];
207	struct mt_vmm_info *mtp;
208	int vcpu;
209
210	mtp = param;
211	vcpu = mtp->mt_vcpu;
212
213	snprintf(tname, sizeof(tname), "%s vcpu %d", vmname, vcpu);
214	pthread_set_name_np(mtp->mt_thr, tname);
215
216	vm_loop(mtp->mt_ctx, vcpu, vmexit[vcpu].rip);
217
218	/* not reached */
219	exit(1);
220	return (NULL);
221}
222
223void
224fbsdrun_addcpu(struct vmctx *ctx, int vcpu, uint64_t rip)
225{
226	int error;
227
228	if (cpumask & (1 << vcpu)) {
229		fprintf(stderr, "addcpu: attempting to add existing cpu %d\n",
230		    vcpu);
231		exit(1);
232	}
233
234	cpumask |= 1 << vcpu;
235	foundcpus++;
236
237	/*
238	 * Set up the vmexit struct to allow execution to start
239	 * at the given RIP
240	 */
241	vmexit[vcpu].rip = rip;
242	vmexit[vcpu].inst_length = 0;
243
244	if (vcpu == BSP || !guest_vcpu_mux){
245		mt_vmm_info[vcpu].mt_ctx = ctx;
246		mt_vmm_info[vcpu].mt_vcpu = vcpu;
247
248		error = pthread_create(&mt_vmm_info[vcpu].mt_thr, NULL,
249				fbsdrun_start_thread, &mt_vmm_info[vcpu]);
250		assert(error == 0);
251	}
252}
253
254static int
255fbsdrun_get_next_cpu(int curcpu)
256{
257
258	/*
259	 * Get the next available CPU. Assumes they arrive
260	 * in ascending order with no gaps.
261	 */
262	return ((curcpu + 1) % foundcpus);
263}
264
265static int
266vmexit_catch_reset(void)
267{
268        stats.io_reset++;
269        return (VMEXIT_RESET);
270}
271
272static int
273vmexit_catch_inout(void)
274{
275	return (VMEXIT_ABORT);
276}
277
278static int
279vmexit_handle_notify(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu,
280		     uint32_t eax)
281{
282#if PG_DEBUG /* put all types of debug here */
283        if (eax == 0) {
284		pause_noswitch = 1;
285	} else if (eax == 1) {
286		pause_noswitch = 0;
287	} else {
288		pause_noswitch = 0;
289		if (eax == 5) {
290			vm_set_capability(ctx, *pvcpu, VM_CAP_MTRAP_EXIT, 1);
291		}
292	}
293#endif
294        return (VMEXIT_CONTINUE);
295}
296
297static int
298vmexit_inout(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
299{
300	int error;
301	int bytes, port, in, out;
302	uint32_t eax;
303	int vcpu;
304
305	vcpu = *pvcpu;
306
307	port = vme->u.inout.port;
308	bytes = vme->u.inout.bytes;
309	eax = vme->u.inout.eax;
310	in = vme->u.inout.in;
311	out = !in;
312
313	/* We don't deal with these */
314	if (vme->u.inout.string || vme->u.inout.rep)
315		return (VMEXIT_ABORT);
316
317	/* Special case of guest reset */
318	if (out && port == 0x64 && (uint8_t)eax == 0xFE)
319		return (vmexit_catch_reset());
320
321        /* Extra-special case of host notifications */
322        if (out && port == GUEST_NIO_PORT)
323                return (vmexit_handle_notify(ctx, vme, pvcpu, eax));
324
325	error = emulate_inout(ctx, vcpu, in, port, bytes, &eax, strictio);
326	if (error == 0 && in)
327		error = vm_set_register(ctx, vcpu, VM_REG_GUEST_RAX, eax);
328
329	if (error == 0)
330		return (VMEXIT_CONTINUE);
331	else {
332		fprintf(stderr, "Unhandled %s%c 0x%04x\n",
333			in ? "in" : "out",
334			bytes == 1 ? 'b' : (bytes == 2 ? 'w' : 'l'), port);
335		return (vmexit_catch_inout());
336	}
337}
338
339static int
340vmexit_rdmsr(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
341{
342	fprintf(stderr, "vm exit rdmsr 0x%x, cpu %d\n", vme->u.msr.code,
343	    *pvcpu);
344	return (VMEXIT_ABORT);
345}
346
347static int
348vmexit_wrmsr(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
349{
350	int newcpu;
351	int retval = VMEXIT_CONTINUE;
352
353	newcpu = emulate_wrmsr(ctx, *pvcpu, vme->u.msr.code,vme->u.msr.wval);
354
355	if (guest_vcpu_mux && *pvcpu != newcpu) {
356                retval = VMEXIT_SWITCH;
357                *pvcpu = newcpu;
358        }
359
360        return (retval);
361}
362
363static int
364vmexit_spinup_ap(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu)
365{
366	int newcpu;
367	int retval = VMEXIT_CONTINUE;
368
369	newcpu = spinup_ap(ctx, *pvcpu,
370			   vme->u.spinup_ap.vcpu, vme->u.spinup_ap.rip);
371
372	if (guest_vcpu_mux && *pvcpu != newcpu) {
373		retval = VMEXIT_SWITCH;
374		*pvcpu = newcpu;
375	}
376
377	return (retval);
378}
379
380static int
381vmexit_vmx(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
382{
383
384	fprintf(stderr, "vm exit[%d]\n", *pvcpu);
385	fprintf(stderr, "\treason\t\tVMX\n");
386	fprintf(stderr, "\trip\t\t0x%016lx\n", vmexit->rip);
387	fprintf(stderr, "\tinst_length\t%d\n", vmexit->inst_length);
388	fprintf(stderr, "\terror\t\t%d\n", vmexit->u.vmx.error);
389	fprintf(stderr, "\texit_reason\t%u\n", vmexit->u.vmx.exit_reason);
390	fprintf(stderr, "\tqualification\t0x%016lx\n",
391	    vmexit->u.vmx.exit_qualification);
392
393	return (VMEXIT_ABORT);
394}
395
396static int bogus_noswitch = 1;
397
398static int
399vmexit_bogus(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
400{
401	stats.vmexit_bogus++;
402
403	if (!guest_vcpu_mux || guest_ncpus == 1 || bogus_noswitch) {
404		return (VMEXIT_RESTART);
405	} else {
406		stats.vmexit_bogus_switch++;
407		vmexit->inst_length = 0;
408		*pvcpu = -1;
409		return (VMEXIT_SWITCH);
410	}
411}
412
413static int
414vmexit_hlt(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
415{
416	stats.vmexit_hlt++;
417	if (fbsdrun_muxed()) {
418		*pvcpu = -1;
419		return (VMEXIT_SWITCH);
420	} else {
421		/*
422		 * Just continue execution with the next instruction. We use
423		 * the HLT VM exit as a way to be friendly with the host
424		 * scheduler.
425		 */
426		return (VMEXIT_CONTINUE);
427	}
428}
429
430static int pause_noswitch;
431
432static int
433vmexit_pause(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
434{
435	stats.vmexit_pause++;
436
437	if (fbsdrun_muxed() && !pause_noswitch) {
438		*pvcpu = -1;
439		return (VMEXIT_SWITCH);
440        } else {
441		return (VMEXIT_CONTINUE);
442	}
443}
444
445static int
446vmexit_mtrap(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
447{
448	stats.vmexit_mtrap++;
449
450	return (VMEXIT_RESTART);
451}
452
453static int
454vmexit_paging(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu)
455{
456	int err;
457	stats.vmexit_paging++;
458
459	err = emulate_mem(ctx, *pvcpu, vmexit->u.paging.gpa,
460			  &vmexit->u.paging.vie);
461
462	if (err) {
463		if (err == EINVAL) {
464			fprintf(stderr,
465			    "Failed to emulate instruction at 0x%lx\n",
466			    vmexit->rip);
467		} else if (err == ESRCH) {
468			fprintf(stderr, "Unhandled memory access to 0x%lx\n",
469			    vmexit->u.paging.gpa);
470		}
471
472		return (VMEXIT_ABORT);
473	}
474
475	return (VMEXIT_CONTINUE);
476}
477
478static void
479sigalrm(int sig)
480{
481	return;
482}
483
484static void
485setup_timeslice(void)
486{
487	struct sigaction sa;
488	struct itimerval itv;
489	int error;
490
491	/*
492	 * Setup a realtime timer to generate a SIGALRM at a
493	 * frequency of 'guest_tslice' ticks per second.
494	 */
495	sigemptyset(&sa.sa_mask);
496	sa.sa_flags = 0;
497	sa.sa_handler = sigalrm;
498
499	error = sigaction(SIGALRM, &sa, NULL);
500	assert(error == 0);
501
502	itv.it_interval.tv_sec = 0;
503	itv.it_interval.tv_usec = 1000000 / guest_tslice;
504	itv.it_value.tv_sec = 0;
505	itv.it_value.tv_usec = 1000000 / guest_tslice;
506
507	error = setitimer(ITIMER_REAL, &itv, NULL);
508	assert(error == 0);
509}
510
511static vmexit_handler_t handler[VM_EXITCODE_MAX] = {
512	[VM_EXITCODE_INOUT]  = vmexit_inout,
513	[VM_EXITCODE_VMX]    = vmexit_vmx,
514	[VM_EXITCODE_BOGUS]  = vmexit_bogus,
515	[VM_EXITCODE_RDMSR]  = vmexit_rdmsr,
516	[VM_EXITCODE_WRMSR]  = vmexit_wrmsr,
517	[VM_EXITCODE_MTRAP]  = vmexit_mtrap,
518	[VM_EXITCODE_PAGING] = vmexit_paging,
519	[VM_EXITCODE_SPINUP_AP] = vmexit_spinup_ap,
520};
521
522static void
523vm_loop(struct vmctx *ctx, int vcpu, uint64_t rip)
524{
525	cpuset_t mask;
526	int error, rc, prevcpu;
527
528	if (guest_vcpu_mux)
529		setup_timeslice();
530
531	if (pincpu >= 0) {
532		CPU_ZERO(&mask);
533		CPU_SET(pincpu + vcpu, &mask);
534		error = pthread_setaffinity_np(pthread_self(),
535					       sizeof(mask), &mask);
536		assert(error == 0);
537	}
538
539	while (1) {
540		error = vm_run(ctx, vcpu, rip, &vmexit[vcpu]);
541		if (error != 0) {
542			/*
543			 * It is possible that 'vmmctl' or some other process
544			 * has transitioned the vcpu to CANNOT_RUN state right
545			 * before we tried to transition it to RUNNING.
546			 *
547			 * This is expected to be temporary so just retry.
548			 */
549			if (errno == EBUSY)
550				continue;
551			else
552				break;
553		}
554
555		prevcpu = vcpu;
556                rc = (*handler[vmexit[vcpu].exitcode])(ctx, &vmexit[vcpu],
557                                                       &vcpu);
558		switch (rc) {
559                case VMEXIT_SWITCH:
560			assert(guest_vcpu_mux);
561			if (vcpu == -1) {
562				stats.cpu_switch_rotate++;
563				vcpu = fbsdrun_get_next_cpu(prevcpu);
564			} else {
565				stats.cpu_switch_direct++;
566			}
567			/* fall through */
568		case VMEXIT_CONTINUE:
569                        rip = vmexit[vcpu].rip + vmexit[vcpu].inst_length;
570			break;
571		case VMEXIT_RESTART:
572                        rip = vmexit[vcpu].rip;
573			break;
574		case VMEXIT_RESET:
575			exit(0);
576		default:
577			exit(1);
578		}
579	}
580	fprintf(stderr, "vm_run error %d, errno %d\n", error, errno);
581}
582
583static int
584num_vcpus_allowed(struct vmctx *ctx)
585{
586	int tmp, error;
587
588	error = vm_get_capability(ctx, BSP, VM_CAP_UNRESTRICTED_GUEST, &tmp);
589
590	/*
591	 * The guest is allowed to spinup more than one processor only if the
592	 * UNRESTRICTED_GUEST capability is available.
593	 */
594	if (error == 0)
595		return (VM_MAXCPU);
596	else
597		return (1);
598}
599
600int
601main(int argc, char *argv[])
602{
603	int c, error, gdb_port, inject_bkpt, tmp, err, ioapic, bvmcons;
604	int max_vcpus;
605	struct vmctx *ctx;
606	uint64_t rip;
607
608	bvmcons = 0;
609	inject_bkpt = 0;
610	progname = basename(argv[0]);
611	gdb_port = DEFAULT_GDB_PORT;
612	guest_ncpus = 1;
613	ioapic = 0;
614
615	while ((c = getopt(argc, argv, "abehABHIPxp:g:c:z:s:S:n:m:M:")) != -1) {
616		switch (c) {
617		case 'a':
618			disable_x2apic = 1;
619			break;
620		case 'A':
621			acpi = 1;
622			break;
623		case 'b':
624			bvmcons = 1;
625			break;
626		case 'B':
627			inject_bkpt = 1;
628			break;
629		case 'x':
630			guest_vcpu_mux = 1;
631			break;
632		case 'p':
633			pincpu = atoi(optarg);
634			break;
635                case 'c':
636			guest_ncpus = atoi(optarg);
637			break;
638		case 'g':
639			gdb_port = atoi(optarg);
640			break;
641		case 'z':
642			guest_hz = atoi(optarg);
643			break;
644		case 't':
645			guest_tslice = atoi(optarg);
646			break;
647		case 's':
648			pci_parse_slot(optarg, 0);
649			break;
650		case 'S':
651			pci_parse_slot(optarg, 1);
652			break;
653                case 'm':
654			lomem_sz = strtoul(optarg, NULL, 0) * MB;
655			break;
656                case 'M':
657			himem_sz = strtoul(optarg, NULL, 0) * MB;
658			break;
659		case 'H':
660			guest_vmexit_on_hlt = 1;
661			break;
662		case 'I':
663			ioapic = 1;
664			break;
665		case 'P':
666			guest_vmexit_on_pause = 1;
667			break;
668		case 'e':
669			strictio = 1;
670			break;
671		case 'h':
672			usage(0);
673		default:
674			usage(1);
675		}
676	}
677	argc -= optind;
678	argv += optind;
679
680	if (argc != 1)
681		usage(1);
682
683	/* No need to mux if guest is uni-processor */
684	if (guest_ncpus <= 1)
685		guest_vcpu_mux = 0;
686
687	/* vmexit on hlt if guest is muxed */
688	if (guest_vcpu_mux) {
689		guest_vmexit_on_hlt = 1;
690		guest_vmexit_on_pause = 1;
691	}
692
693	vmname = argv[0];
694
695	ctx = vm_open(vmname);
696	if (ctx == NULL) {
697		perror("vm_open");
698		exit(1);
699	}
700
701	max_vcpus = num_vcpus_allowed(ctx);
702	if (guest_ncpus > max_vcpus) {
703		fprintf(stderr, "%d vCPUs requested but only %d available\n",
704			guest_ncpus, max_vcpus);
705		exit(1);
706	}
707
708	if (fbsdrun_vmexit_on_hlt()) {
709		err = vm_get_capability(ctx, BSP, VM_CAP_HALT_EXIT, &tmp);
710		if (err < 0) {
711			fprintf(stderr, "VM exit on HLT not supported\n");
712			exit(1);
713		}
714		vm_set_capability(ctx, BSP, VM_CAP_HALT_EXIT, 1);
715		handler[VM_EXITCODE_HLT] = vmexit_hlt;
716	}
717
718        if (fbsdrun_vmexit_on_pause()) {
719		/*
720		 * pause exit support required for this mode
721		 */
722		err = vm_get_capability(ctx, BSP, VM_CAP_PAUSE_EXIT, &tmp);
723		if (err < 0) {
724			fprintf(stderr,
725			    "SMP mux requested, no pause support\n");
726			exit(1);
727		}
728		vm_set_capability(ctx, BSP, VM_CAP_PAUSE_EXIT, 1);
729		handler[VM_EXITCODE_PAUSE] = vmexit_pause;
730        }
731
732	if (fbsdrun_disable_x2apic())
733		err = vm_set_x2apic_state(ctx, BSP, X2APIC_DISABLED);
734	else
735		err = vm_set_x2apic_state(ctx, BSP, X2APIC_ENABLED);
736
737	if (err) {
738		fprintf(stderr, "Unable to set x2apic state (%d)\n", err);
739		exit(1);
740	}
741
742	if (lomem_sz != 0) {
743		lomem_addr = vm_map_memory(ctx, 0, lomem_sz);
744		if (lomem_addr == (char *) MAP_FAILED) {
745			lomem_sz = 0;
746		} else if (himem_sz != 0) {
747			himem_addr = vm_map_memory(ctx, 4*GB, himem_sz);
748			if (himem_addr == (char *) MAP_FAILED) {
749				lomem_sz = 0;
750				himem_sz = 0;
751			}
752		}
753	}
754
755	init_inout();
756	init_pci(ctx);
757	if (ioapic)
758		ioapic_init(0);
759
760	if (gdb_port != 0)
761		init_dbgport(gdb_port);
762
763	if (bvmcons)
764		init_bvmcons();
765
766	error = vm_get_register(ctx, BSP, VM_REG_GUEST_RIP, &rip);
767	assert(error == 0);
768
769	if (inject_bkpt) {
770		error = vm_inject_event(ctx, BSP, VM_HW_EXCEPTION, IDT_BP);
771		assert(error == 0);
772	}
773
774	/*
775	 * build the guest tables, MP etc.
776	 */
777	mptable_build(ctx, guest_ncpus, ioapic);
778
779	if (acpi) {
780		error = acpi_build(ctx, guest_ncpus, ioapic);
781		assert(error == 0);
782	}
783
784	/*
785	 * Add CPU 0
786	 */
787	fbsdrun_addcpu(ctx, BSP, rip);
788
789	/*
790	 * Head off to the main event dispatch loop
791	 */
792	mevent_dispatch();
793
794	exit(1);
795}
796