xref: /freebsd/sys/amd64/vmm/vmm.c (revision 147d12a7d38b5e5294de6dd238cc22e41ef2448c)
1366f6083SPeter Grehan /*-
2c49761ddSPedro F. Giffuni  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3c49761ddSPedro F. Giffuni  *
4366f6083SPeter Grehan  * Copyright (c) 2011 NetApp, Inc.
5366f6083SPeter Grehan  * All rights reserved.
6366f6083SPeter Grehan  *
7366f6083SPeter Grehan  * Redistribution and use in source and binary forms, with or without
8366f6083SPeter Grehan  * modification, are permitted provided that the following conditions
9366f6083SPeter Grehan  * are met:
10366f6083SPeter Grehan  * 1. Redistributions of source code must retain the above copyright
11366f6083SPeter Grehan  *    notice, this list of conditions and the following disclaimer.
12366f6083SPeter Grehan  * 2. Redistributions in binary form must reproduce the above copyright
13366f6083SPeter Grehan  *    notice, this list of conditions and the following disclaimer in the
14366f6083SPeter Grehan  *    documentation and/or other materials provided with the distribution.
15366f6083SPeter Grehan  *
16366f6083SPeter Grehan  * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
17366f6083SPeter Grehan  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18366f6083SPeter Grehan  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19366f6083SPeter Grehan  * ARE DISCLAIMED.  IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
20366f6083SPeter Grehan  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21366f6083SPeter Grehan  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22366f6083SPeter Grehan  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23366f6083SPeter Grehan  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24366f6083SPeter Grehan  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25366f6083SPeter Grehan  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26366f6083SPeter Grehan  * SUCH DAMAGE.
27366f6083SPeter Grehan  *
28366f6083SPeter Grehan  * $FreeBSD$
29366f6083SPeter Grehan  */
30366f6083SPeter Grehan 
31366f6083SPeter Grehan #include <sys/cdefs.h>
32366f6083SPeter Grehan __FBSDID("$FreeBSD$");
33366f6083SPeter Grehan 
34366f6083SPeter Grehan #include <sys/param.h>
3538f1b189SPeter Grehan #include <sys/systm.h>
36366f6083SPeter Grehan #include <sys/kernel.h>
37366f6083SPeter Grehan #include <sys/module.h>
38366f6083SPeter Grehan #include <sys/sysctl.h>
39366f6083SPeter Grehan #include <sys/malloc.h>
40366f6083SPeter Grehan #include <sys/pcpu.h>
41366f6083SPeter Grehan #include <sys/lock.h>
42366f6083SPeter Grehan #include <sys/mutex.h>
43366f6083SPeter Grehan #include <sys/proc.h>
44318224bbSNeel Natu #include <sys/rwlock.h>
45366f6083SPeter Grehan #include <sys/sched.h>
46366f6083SPeter Grehan #include <sys/smp.h>
47366f6083SPeter Grehan #include <sys/systm.h>
48366f6083SPeter Grehan 
49366f6083SPeter Grehan #include <vm/vm.h>
50318224bbSNeel Natu #include <vm/vm_object.h>
51318224bbSNeel Natu #include <vm/vm_page.h>
52318224bbSNeel Natu #include <vm/pmap.h>
53318224bbSNeel Natu #include <vm/vm_map.h>
54318224bbSNeel Natu #include <vm/vm_extern.h>
55318224bbSNeel Natu #include <vm/vm_param.h>
56366f6083SPeter Grehan 
5763e62d39SJohn Baldwin #include <machine/cpu.h>
58366f6083SPeter Grehan #include <machine/pcb.h>
5975dd3366SNeel Natu #include <machine/smp.h>
60bd50262fSKonstantin Belousov #include <machine/md_var.h>
611c052192SNeel Natu #include <x86/psl.h>
6234a6b2d6SJohn Baldwin #include <x86/apicreg.h>
63366f6083SPeter Grehan 
64366f6083SPeter Grehan #include <machine/vmm.h>
65565bbb86SNeel Natu #include <machine/vmm_dev.h>
66e813a873SNeel Natu #include <machine/vmm_instruction_emul.h>
67565bbb86SNeel Natu 
68d17b5104SNeel Natu #include "vmm_ioport.h"
69318224bbSNeel Natu #include "vmm_ktr.h"
70b01c2033SNeel Natu #include "vmm_host.h"
71366f6083SPeter Grehan #include "vmm_mem.h"
72366f6083SPeter Grehan #include "vmm_util.h"
73762fd208STycho Nightingale #include "vatpic.h"
74e883c9bbSTycho Nightingale #include "vatpit.h"
7508e3ff32SNeel Natu #include "vhpet.h"
76565bbb86SNeel Natu #include "vioapic.h"
77366f6083SPeter Grehan #include "vlapic.h"
78160ef77aSNeel Natu #include "vpmtmr.h"
790dafa5cdSNeel Natu #include "vrtc.h"
80366f6083SPeter Grehan #include "vmm_stat.h"
81f76fc5d4SNeel Natu #include "vmm_lapic.h"
82366f6083SPeter Grehan 
83366f6083SPeter Grehan #include "io/ppt.h"
84366f6083SPeter Grehan #include "io/iommu.h"
85366f6083SPeter Grehan 
86366f6083SPeter Grehan struct vlapic;
87366f6083SPeter Grehan 
885fcf252fSNeel Natu /*
895fcf252fSNeel Natu  * Initialization:
905fcf252fSNeel Natu  * (a) allocated when vcpu is created
915fcf252fSNeel Natu  * (i) initialized when vcpu is created and when it is reinitialized
925fcf252fSNeel Natu  * (o) initialized the first time the vcpu is created
935fcf252fSNeel Natu  * (x) initialized before use
945fcf252fSNeel Natu  */
95366f6083SPeter Grehan struct vcpu {
965fcf252fSNeel Natu 	struct mtx 	mtx;		/* (o) protects 'state' and 'hostcpu' */
975fcf252fSNeel Natu 	enum vcpu_state	state;		/* (o) vcpu state */
985fcf252fSNeel Natu 	int		hostcpu;	/* (o) vcpu's host cpu */
99248e6799SNeel Natu 	int		reqidle;	/* (i) request vcpu to idle */
1005fcf252fSNeel Natu 	struct vlapic	*vlapic;	/* (i) APIC device model */
1015fcf252fSNeel Natu 	enum x2apic_state x2apic_state;	/* (i) APIC mode */
102091d4532SNeel Natu 	uint64_t	exitintinfo;	/* (i) events pending at VM exit */
1035fcf252fSNeel Natu 	int		nmi_pending;	/* (i) NMI pending */
1045fcf252fSNeel Natu 	int		extint_pending;	/* (i) INTR pending */
1055fcf252fSNeel Natu 	int	exception_pending;	/* (i) exception pending */
106c9c75df4SNeel Natu 	int	exc_vector;		/* (x) exception collateral */
107c9c75df4SNeel Natu 	int	exc_errcode_valid;
108c9c75df4SNeel Natu 	uint32_t exc_errcode;
1095fcf252fSNeel Natu 	struct savefpu	*guestfpu;	/* (a,i) guest fpu state */
1105fcf252fSNeel Natu 	uint64_t	guest_xcr0;	/* (i) guest %xcr0 register */
1115fcf252fSNeel Natu 	void		*stats;		/* (a,i) statistics */
1125fcf252fSNeel Natu 	struct vm_exit	exitinfo;	/* (x) exit reason and collateral */
113d087a399SNeel Natu 	uint64_t	nextrip;	/* (x) next instruction to execute */
114366f6083SPeter Grehan };
115366f6083SPeter Grehan 
1165fcf252fSNeel Natu #define	vcpu_lock_initialized(v) mtx_initialized(&((v)->mtx))
117f76fc5d4SNeel Natu #define	vcpu_lock_init(v)	mtx_init(&((v)->mtx), "vcpu lock", 0, MTX_SPIN)
118f76fc5d4SNeel Natu #define	vcpu_lock(v)		mtx_lock_spin(&((v)->mtx))
119f76fc5d4SNeel Natu #define	vcpu_unlock(v)		mtx_unlock_spin(&((v)->mtx))
120318224bbSNeel Natu #define	vcpu_assert_locked(v)	mtx_assert(&((v)->mtx), MA_OWNED)
12175dd3366SNeel Natu 
122318224bbSNeel Natu struct mem_seg {
1239b1aa8d6SNeel Natu 	size_t	len;
1249b1aa8d6SNeel Natu 	bool	sysmem;
1259b1aa8d6SNeel Natu 	struct vm_object *object;
1269b1aa8d6SNeel Natu };
1276bcf245eSMarcel Moolenaar #define	VM_MAX_MEMSEGS	3
1289b1aa8d6SNeel Natu 
1299b1aa8d6SNeel Natu struct mem_map {
130318224bbSNeel Natu 	vm_paddr_t	gpa;
131318224bbSNeel Natu 	size_t		len;
1329b1aa8d6SNeel Natu 	vm_ooffset_t	segoff;
1339b1aa8d6SNeel Natu 	int		segid;
1349b1aa8d6SNeel Natu 	int		prot;
1359b1aa8d6SNeel Natu 	int		flags;
136318224bbSNeel Natu };
1379b1aa8d6SNeel Natu #define	VM_MAX_MEMMAPS	4
138366f6083SPeter Grehan 
139366f6083SPeter Grehan /*
1405fcf252fSNeel Natu  * Initialization:
1415fcf252fSNeel Natu  * (o) initialized the first time the VM is created
1425fcf252fSNeel Natu  * (i) initialized when VM is created and when it is reinitialized
1435fcf252fSNeel Natu  * (x) initialized before use
144366f6083SPeter Grehan  */
1455fcf252fSNeel Natu struct vm {
1465fcf252fSNeel Natu 	void		*cookie;		/* (i) cpu-specific data */
1475fcf252fSNeel Natu 	void		*iommu;			/* (x) iommu-specific data */
1485fcf252fSNeel Natu 	struct vhpet	*vhpet;			/* (i) virtual HPET */
1495fcf252fSNeel Natu 	struct vioapic	*vioapic;		/* (i) virtual ioapic */
1505fcf252fSNeel Natu 	struct vatpic	*vatpic;		/* (i) virtual atpic */
1515fcf252fSNeel Natu 	struct vatpit	*vatpit;		/* (i) virtual atpit */
152160ef77aSNeel Natu 	struct vpmtmr	*vpmtmr;		/* (i) virtual ACPI PM timer */
1530dafa5cdSNeel Natu 	struct vrtc	*vrtc;			/* (o) virtual RTC */
1545fcf252fSNeel Natu 	volatile cpuset_t active_cpus;		/* (i) active vcpus */
155fc276d92SJohn Baldwin 	volatile cpuset_t debug_cpus;		/* (i) vcpus stopped for debug */
1565fcf252fSNeel Natu 	int		suspend;		/* (i) stop VM execution */
1575fcf252fSNeel Natu 	volatile cpuset_t suspended_cpus; 	/* (i) suspended vcpus */
1585fcf252fSNeel Natu 	volatile cpuset_t halted_cpus;		/* (x) cpus in a hard halt */
1595fcf252fSNeel Natu 	cpuset_t	rendezvous_req_cpus;	/* (x) rendezvous requested */
1605fcf252fSNeel Natu 	cpuset_t	rendezvous_done_cpus;	/* (x) rendezvous finished */
1615fcf252fSNeel Natu 	void		*rendezvous_arg;	/* (x) rendezvous func/arg */
1625b8a8cd1SNeel Natu 	vm_rendezvous_func_t rendezvous_func;
1635fcf252fSNeel Natu 	struct mtx	rendezvous_mtx;		/* (o) rendezvous lock */
1649b1aa8d6SNeel Natu 	struct mem_map	mem_maps[VM_MAX_MEMMAPS]; /* (i) guest address space */
1659b1aa8d6SNeel Natu 	struct mem_seg	mem_segs[VM_MAX_MEMSEGS]; /* (o) guest memory regions */
1665fcf252fSNeel Natu 	struct vmspace	*vmspace;		/* (o) guest's address space */
1675fcf252fSNeel Natu 	char		name[VM_MAX_NAMELEN];	/* (o) virtual machine name */
1685fcf252fSNeel Natu 	struct vcpu	vcpu[VM_MAXCPU];	/* (i) guest vcpus */
16901d822d3SRodney W. Grimes 	/* The following describe the vm cpu topology */
17001d822d3SRodney W. Grimes 	uint16_t	sockets;		/* (o) num of sockets */
17101d822d3SRodney W. Grimes 	uint16_t	cores;			/* (o) num of cores/socket */
17201d822d3SRodney W. Grimes 	uint16_t	threads;		/* (o) num of threads/core */
17301d822d3SRodney W. Grimes 	uint16_t	maxcpus;		/* (o) max pluggable cpus */
174366f6083SPeter Grehan };
175366f6083SPeter Grehan 
176d5408b1dSNeel Natu static int vmm_initialized;
177d5408b1dSNeel Natu 
178366f6083SPeter Grehan static struct vmm_ops *ops;
179add611fdSNeel Natu #define	VMM_INIT(num)	(ops != NULL ? (*ops->init)(num) : 0)
180366f6083SPeter Grehan #define	VMM_CLEANUP()	(ops != NULL ? (*ops->cleanup)() : 0)
18163e62d39SJohn Baldwin #define	VMM_RESUME()	(ops != NULL ? (*ops->resume)() : 0)
182366f6083SPeter Grehan 
183318224bbSNeel Natu #define	VMINIT(vm, pmap) (ops != NULL ? (*ops->vminit)(vm, pmap): NULL)
184248e6799SNeel Natu #define	VMRUN(vmi, vcpu, rip, pmap, evinfo) \
185248e6799SNeel Natu 	(ops != NULL ? (*ops->vmrun)(vmi, vcpu, rip, pmap, evinfo) : ENXIO)
186366f6083SPeter Grehan #define	VMCLEANUP(vmi)	(ops != NULL ? (*ops->vmcleanup)(vmi) : NULL)
187318224bbSNeel Natu #define	VMSPACE_ALLOC(min, max) \
188318224bbSNeel Natu 	(ops != NULL ? (*ops->vmspace_alloc)(min, max) : NULL)
189318224bbSNeel Natu #define	VMSPACE_FREE(vmspace) \
190318224bbSNeel Natu 	(ops != NULL ? (*ops->vmspace_free)(vmspace) : ENXIO)
191366f6083SPeter Grehan #define	VMGETREG(vmi, vcpu, num, retval)		\
192366f6083SPeter Grehan 	(ops != NULL ? (*ops->vmgetreg)(vmi, vcpu, num, retval) : ENXIO)
193366f6083SPeter Grehan #define	VMSETREG(vmi, vcpu, num, val)		\
194366f6083SPeter Grehan 	(ops != NULL ? (*ops->vmsetreg)(vmi, vcpu, num, val) : ENXIO)
195366f6083SPeter Grehan #define	VMGETDESC(vmi, vcpu, num, desc)		\
196366f6083SPeter Grehan 	(ops != NULL ? (*ops->vmgetdesc)(vmi, vcpu, num, desc) : ENXIO)
197366f6083SPeter Grehan #define	VMSETDESC(vmi, vcpu, num, desc)		\
198366f6083SPeter Grehan 	(ops != NULL ? (*ops->vmsetdesc)(vmi, vcpu, num, desc) : ENXIO)
199366f6083SPeter Grehan #define	VMGETCAP(vmi, vcpu, num, retval)	\
200366f6083SPeter Grehan 	(ops != NULL ? (*ops->vmgetcap)(vmi, vcpu, num, retval) : ENXIO)
201366f6083SPeter Grehan #define	VMSETCAP(vmi, vcpu, num, val)		\
202366f6083SPeter Grehan 	(ops != NULL ? (*ops->vmsetcap)(vmi, vcpu, num, val) : ENXIO)
203de5ea6b6SNeel Natu #define	VLAPIC_INIT(vmi, vcpu)			\
204de5ea6b6SNeel Natu 	(ops != NULL ? (*ops->vlapic_init)(vmi, vcpu) : NULL)
205de5ea6b6SNeel Natu #define	VLAPIC_CLEANUP(vmi, vlapic)		\
206de5ea6b6SNeel Natu 	(ops != NULL ? (*ops->vlapic_cleanup)(vmi, vlapic) : NULL)
207366f6083SPeter Grehan 
208014a52f3SNeel Natu #define	fpu_start_emulating()	load_cr0(rcr0() | CR0_TS)
209014a52f3SNeel Natu #define	fpu_stop_emulating()	clts()
210366f6083SPeter Grehan 
2116ac73777STycho Nightingale SDT_PROVIDER_DEFINE(vmm);
2126ac73777STycho Nightingale 
213366f6083SPeter Grehan static MALLOC_DEFINE(M_VM, "vm", "vm");
214366f6083SPeter Grehan 
215366f6083SPeter Grehan /* statistics */
21661592433SNeel Natu static VMM_STAT(VCPU_TOTAL_RUNTIME, "vcpu total runtime");
217366f6083SPeter Grehan 
218add611fdSNeel Natu SYSCTL_NODE(_hw, OID_AUTO, vmm, CTLFLAG_RW, NULL, NULL);
219add611fdSNeel Natu 
220055fc2cbSNeel Natu /*
221055fc2cbSNeel Natu  * Halt the guest if all vcpus are executing a HLT instruction with
222055fc2cbSNeel Natu  * interrupts disabled.
223055fc2cbSNeel Natu  */
224055fc2cbSNeel Natu static int halt_detection_enabled = 1;
225055fc2cbSNeel Natu SYSCTL_INT(_hw_vmm, OID_AUTO, halt_detection, CTLFLAG_RDTUN,
226055fc2cbSNeel Natu     &halt_detection_enabled, 0,
227055fc2cbSNeel Natu     "Halt VM if all vcpus execute HLT with interrupts disabled");
228055fc2cbSNeel Natu 
229978f3da1SAndriy Gapon static int vmm_ipinum;
230add611fdSNeel Natu SYSCTL_INT(_hw_vmm, OID_AUTO, ipinum, CTLFLAG_RD, &vmm_ipinum, 0,
231add611fdSNeel Natu     "IPI vector used for vcpu notifications");
232add611fdSNeel Natu 
233b0538143SNeel Natu static int trace_guest_exceptions;
234b0538143SNeel Natu SYSCTL_INT(_hw_vmm, OID_AUTO, trace_guest_exceptions, CTLFLAG_RDTUN,
235b0538143SNeel Natu     &trace_guest_exceptions, 0,
236b0538143SNeel Natu     "Trap into hypervisor on all guest exceptions and reflect them back");
237b0538143SNeel Natu 
2389b1aa8d6SNeel Natu static void vm_free_memmap(struct vm *vm, int ident);
2399b1aa8d6SNeel Natu static bool sysmem_mapping(struct vm *vm, struct mem_map *mm);
240248e6799SNeel Natu static void vcpu_notify_event_locked(struct vcpu *vcpu, bool lapic_intr);
241248e6799SNeel Natu 
242248e6799SNeel Natu #ifdef KTR
243248e6799SNeel Natu static const char *
244248e6799SNeel Natu vcpu_state2str(enum vcpu_state state)
245248e6799SNeel Natu {
246248e6799SNeel Natu 
247248e6799SNeel Natu 	switch (state) {
248248e6799SNeel Natu 	case VCPU_IDLE:
249248e6799SNeel Natu 		return ("idle");
250248e6799SNeel Natu 	case VCPU_FROZEN:
251248e6799SNeel Natu 		return ("frozen");
252248e6799SNeel Natu 	case VCPU_RUNNING:
253248e6799SNeel Natu 		return ("running");
254248e6799SNeel Natu 	case VCPU_SLEEPING:
255248e6799SNeel Natu 		return ("sleeping");
256248e6799SNeel Natu 	default:
257248e6799SNeel Natu 		return ("unknown");
258248e6799SNeel Natu 	}
259248e6799SNeel Natu }
260248e6799SNeel Natu #endif
261248e6799SNeel Natu 
262366f6083SPeter Grehan static void
2635fcf252fSNeel Natu vcpu_cleanup(struct vm *vm, int i, bool destroy)
264366f6083SPeter Grehan {
265de5ea6b6SNeel Natu 	struct vcpu *vcpu = &vm->vcpu[i];
266de5ea6b6SNeel Natu 
267de5ea6b6SNeel Natu 	VLAPIC_CLEANUP(vm->cookie, vcpu->vlapic);
2685fcf252fSNeel Natu 	if (destroy) {
269366f6083SPeter Grehan 		vmm_stat_free(vcpu->stats);
27038f1b189SPeter Grehan 		fpu_save_area_free(vcpu->guestfpu);
271366f6083SPeter Grehan 	}
2725fcf252fSNeel Natu }
273366f6083SPeter Grehan 
274366f6083SPeter Grehan static void
2755fcf252fSNeel Natu vcpu_init(struct vm *vm, int vcpu_id, bool create)
276366f6083SPeter Grehan {
277366f6083SPeter Grehan 	struct vcpu *vcpu;
278366f6083SPeter Grehan 
2795fcf252fSNeel Natu 	KASSERT(vcpu_id >= 0 && vcpu_id < VM_MAXCPU,
2805fcf252fSNeel Natu 	    ("vcpu_init: invalid vcpu %d", vcpu_id));
2815fcf252fSNeel Natu 
282366f6083SPeter Grehan 	vcpu = &vm->vcpu[vcpu_id];
283366f6083SPeter Grehan 
2845fcf252fSNeel Natu 	if (create) {
2855fcf252fSNeel Natu 		KASSERT(!vcpu_lock_initialized(vcpu), ("vcpu %d already "
2865fcf252fSNeel Natu 		    "initialized", vcpu_id));
28775dd3366SNeel Natu 		vcpu_lock_init(vcpu);
2885fcf252fSNeel Natu 		vcpu->state = VCPU_IDLE;
28975dd3366SNeel Natu 		vcpu->hostcpu = NOCPU;
2905fcf252fSNeel Natu 		vcpu->guestfpu = fpu_save_area_alloc();
2915fcf252fSNeel Natu 		vcpu->stats = vmm_stat_alloc();
2925fcf252fSNeel Natu 	}
2935fcf252fSNeel Natu 
294de5ea6b6SNeel Natu 	vcpu->vlapic = VLAPIC_INIT(vm->cookie, vcpu_id);
29552e5c8a2SNeel Natu 	vm_set_x2apic_state(vm, vcpu_id, X2APIC_DISABLED);
296248e6799SNeel Natu 	vcpu->reqidle = 0;
297091d4532SNeel Natu 	vcpu->exitintinfo = 0;
2985fcf252fSNeel Natu 	vcpu->nmi_pending = 0;
2995fcf252fSNeel Natu 	vcpu->extint_pending = 0;
3005fcf252fSNeel Natu 	vcpu->exception_pending = 0;
301abb023fbSJohn Baldwin 	vcpu->guest_xcr0 = XFEATURE_ENABLED_X87;
30238f1b189SPeter Grehan 	fpu_save_area_reset(vcpu->guestfpu);
3035fcf252fSNeel Natu 	vmm_stat_init(vcpu->stats);
304366f6083SPeter Grehan }
305366f6083SPeter Grehan 
306b0538143SNeel Natu int
307b0538143SNeel Natu vcpu_trace_exceptions(struct vm *vm, int vcpuid)
308b0538143SNeel Natu {
309b0538143SNeel Natu 
310b0538143SNeel Natu 	return (trace_guest_exceptions);
311b0538143SNeel Natu }
312b0538143SNeel Natu 
31398ed632cSNeel Natu struct vm_exit *
31498ed632cSNeel Natu vm_exitinfo(struct vm *vm, int cpuid)
31598ed632cSNeel Natu {
31698ed632cSNeel Natu 	struct vcpu *vcpu;
31798ed632cSNeel Natu 
31898ed632cSNeel Natu 	if (cpuid < 0 || cpuid >= VM_MAXCPU)
31998ed632cSNeel Natu 		panic("vm_exitinfo: invalid cpuid %d", cpuid);
32098ed632cSNeel Natu 
32198ed632cSNeel Natu 	vcpu = &vm->vcpu[cpuid];
32298ed632cSNeel Natu 
32398ed632cSNeel Natu 	return (&vcpu->exitinfo);
32498ed632cSNeel Natu }
32598ed632cSNeel Natu 
32663e62d39SJohn Baldwin static void
32763e62d39SJohn Baldwin vmm_resume(void)
32863e62d39SJohn Baldwin {
32963e62d39SJohn Baldwin 	VMM_RESUME();
33063e62d39SJohn Baldwin }
33163e62d39SJohn Baldwin 
332366f6083SPeter Grehan static int
333366f6083SPeter Grehan vmm_init(void)
334366f6083SPeter Grehan {
335366f6083SPeter Grehan 	int error;
336366f6083SPeter Grehan 
337b01c2033SNeel Natu 	vmm_host_state_init();
338add611fdSNeel Natu 
339bd50262fSKonstantin Belousov 	vmm_ipinum = lapic_ipi_alloc(pti ? &IDTVEC(justreturn1_pti) :
340bd50262fSKonstantin Belousov 	    &IDTVEC(justreturn));
34118a2b08eSNeel Natu 	if (vmm_ipinum < 0)
342add611fdSNeel Natu 		vmm_ipinum = IPI_AST;
343366f6083SPeter Grehan 
344366f6083SPeter Grehan 	error = vmm_mem_init();
345366f6083SPeter Grehan 	if (error)
346366f6083SPeter Grehan 		return (error);
347366f6083SPeter Grehan 
348366f6083SPeter Grehan 	if (vmm_is_intel())
349366f6083SPeter Grehan 		ops = &vmm_ops_intel;
350366f6083SPeter Grehan 	else if (vmm_is_amd())
351366f6083SPeter Grehan 		ops = &vmm_ops_amd;
352366f6083SPeter Grehan 	else
353366f6083SPeter Grehan 		return (ENXIO);
354366f6083SPeter Grehan 
35563e62d39SJohn Baldwin 	vmm_resume_p = vmm_resume;
356366f6083SPeter Grehan 
357add611fdSNeel Natu 	return (VMM_INIT(vmm_ipinum));
358366f6083SPeter Grehan }
359366f6083SPeter Grehan 
360366f6083SPeter Grehan static int
361366f6083SPeter Grehan vmm_handler(module_t mod, int what, void *arg)
362366f6083SPeter Grehan {
363366f6083SPeter Grehan 	int error;
364366f6083SPeter Grehan 
365366f6083SPeter Grehan 	switch (what) {
366366f6083SPeter Grehan 	case MOD_LOAD:
367366f6083SPeter Grehan 		vmmdev_init();
368366f6083SPeter Grehan 		error = vmm_init();
369d5408b1dSNeel Natu 		if (error == 0)
370d5408b1dSNeel Natu 			vmm_initialized = 1;
371366f6083SPeter Grehan 		break;
372366f6083SPeter Grehan 	case MOD_UNLOAD:
373cdc5b9e7SNeel Natu 		error = vmmdev_cleanup();
374cdc5b9e7SNeel Natu 		if (error == 0) {
37563e62d39SJohn Baldwin 			vmm_resume_p = NULL;
376366f6083SPeter Grehan 			iommu_cleanup();
377add611fdSNeel Natu 			if (vmm_ipinum != IPI_AST)
37818a2b08eSNeel Natu 				lapic_ipi_free(vmm_ipinum);
379366f6083SPeter Grehan 			error = VMM_CLEANUP();
38081ef6611SPeter Grehan 			/*
38181ef6611SPeter Grehan 			 * Something bad happened - prevent new
38281ef6611SPeter Grehan 			 * VMs from being created
38381ef6611SPeter Grehan 			 */
38481ef6611SPeter Grehan 			if (error)
385d5408b1dSNeel Natu 				vmm_initialized = 0;
38681ef6611SPeter Grehan 		}
387366f6083SPeter Grehan 		break;
388366f6083SPeter Grehan 	default:
389366f6083SPeter Grehan 		error = 0;
390366f6083SPeter Grehan 		break;
391366f6083SPeter Grehan 	}
392366f6083SPeter Grehan 	return (error);
393366f6083SPeter Grehan }
394366f6083SPeter Grehan 
395366f6083SPeter Grehan static moduledata_t vmm_kmod = {
396366f6083SPeter Grehan 	"vmm",
397366f6083SPeter Grehan 	vmm_handler,
398366f6083SPeter Grehan 	NULL
399366f6083SPeter Grehan };
400366f6083SPeter Grehan 
401366f6083SPeter Grehan /*
402e3f0800bSNeel Natu  * vmm initialization has the following dependencies:
403e3f0800bSNeel Natu  *
404e3f0800bSNeel Natu  * - VT-x initialization requires smp_rendezvous() and therefore must happen
405e3f0800bSNeel Natu  *   after SMP is fully functional (after SI_SUB_SMP).
406366f6083SPeter Grehan  */
407e3f0800bSNeel Natu DECLARE_MODULE(vmm, vmm_kmod, SI_SUB_SMP + 1, SI_ORDER_ANY);
408366f6083SPeter Grehan MODULE_VERSION(vmm, 1);
409366f6083SPeter Grehan 
4105fcf252fSNeel Natu static void
4115fcf252fSNeel Natu vm_init(struct vm *vm, bool create)
4125fcf252fSNeel Natu {
4135fcf252fSNeel Natu 	int i;
4145fcf252fSNeel Natu 
4155fcf252fSNeel Natu 	vm->cookie = VMINIT(vm, vmspace_pmap(vm->vmspace));
4165fcf252fSNeel Natu 	vm->iommu = NULL;
4175fcf252fSNeel Natu 	vm->vioapic = vioapic_init(vm);
4185fcf252fSNeel Natu 	vm->vhpet = vhpet_init(vm);
4195fcf252fSNeel Natu 	vm->vatpic = vatpic_init(vm);
4205fcf252fSNeel Natu 	vm->vatpit = vatpit_init(vm);
421160ef77aSNeel Natu 	vm->vpmtmr = vpmtmr_init(vm);
4220dafa5cdSNeel Natu 	if (create)
4230dafa5cdSNeel Natu 		vm->vrtc = vrtc_init(vm);
4245fcf252fSNeel Natu 
4255fcf252fSNeel Natu 	CPU_ZERO(&vm->active_cpus);
426fc276d92SJohn Baldwin 	CPU_ZERO(&vm->debug_cpus);
4275fcf252fSNeel Natu 
4285fcf252fSNeel Natu 	vm->suspend = 0;
4295fcf252fSNeel Natu 	CPU_ZERO(&vm->suspended_cpus);
4305fcf252fSNeel Natu 
4315fcf252fSNeel Natu 	for (i = 0; i < VM_MAXCPU; i++)
4325fcf252fSNeel Natu 		vcpu_init(vm, i, create);
4335fcf252fSNeel Natu }
4345fcf252fSNeel Natu 
43501d822d3SRodney W. Grimes /*
43601d822d3SRodney W. Grimes  * The default CPU topology is a single thread per package.
43701d822d3SRodney W. Grimes  */
43801d822d3SRodney W. Grimes u_int cores_per_package = 1;
43901d822d3SRodney W. Grimes u_int threads_per_core = 1;
44001d822d3SRodney W. Grimes 
441d5408b1dSNeel Natu int
442d5408b1dSNeel Natu vm_create(const char *name, struct vm **retvm)
443366f6083SPeter Grehan {
444366f6083SPeter Grehan 	struct vm *vm;
445318224bbSNeel Natu 	struct vmspace *vmspace;
446366f6083SPeter Grehan 
447d5408b1dSNeel Natu 	/*
448d5408b1dSNeel Natu 	 * If vmm.ko could not be successfully initialized then don't attempt
449d5408b1dSNeel Natu 	 * to create the virtual machine.
450d5408b1dSNeel Natu 	 */
451d5408b1dSNeel Natu 	if (!vmm_initialized)
452d5408b1dSNeel Natu 		return (ENXIO);
453d5408b1dSNeel Natu 
454366f6083SPeter Grehan 	if (name == NULL || strlen(name) >= VM_MAX_NAMELEN)
455d5408b1dSNeel Natu 		return (EINVAL);
456366f6083SPeter Grehan 
457526c8885SPeter Grehan 	vmspace = VMSPACE_ALLOC(0, VM_MAXUSER_ADDRESS);
458318224bbSNeel Natu 	if (vmspace == NULL)
459318224bbSNeel Natu 		return (ENOMEM);
460318224bbSNeel Natu 
461366f6083SPeter Grehan 	vm = malloc(sizeof(struct vm), M_VM, M_WAITOK | M_ZERO);
462366f6083SPeter Grehan 	strcpy(vm->name, name);
46388c4b8d1SNeel Natu 	vm->vmspace = vmspace;
4645b8a8cd1SNeel Natu 	mtx_init(&vm->rendezvous_mtx, "vm rendezvous lock", 0, MTX_DEF);
465366f6083SPeter Grehan 
46601d822d3SRodney W. Grimes 	vm->sockets = 1;
46701d822d3SRodney W. Grimes 	vm->cores = cores_per_package;	/* XXX backwards compatibility */
46801d822d3SRodney W. Grimes 	vm->threads = threads_per_core;	/* XXX backwards compatibility */
46901d822d3SRodney W. Grimes 	vm->maxcpus = 0;		/* XXX not implemented */
47001d822d3SRodney W. Grimes 
4715fcf252fSNeel Natu 	vm_init(vm, true);
472366f6083SPeter Grehan 
473d5408b1dSNeel Natu 	*retvm = vm;
474d5408b1dSNeel Natu 	return (0);
475366f6083SPeter Grehan }
476366f6083SPeter Grehan 
47701d822d3SRodney W. Grimes void
47801d822d3SRodney W. Grimes vm_get_topology(struct vm *vm, uint16_t *sockets, uint16_t *cores,
47901d822d3SRodney W. Grimes     uint16_t *threads, uint16_t *maxcpus)
48001d822d3SRodney W. Grimes {
48101d822d3SRodney W. Grimes 	*sockets = vm->sockets;
48201d822d3SRodney W. Grimes 	*cores = vm->cores;
48301d822d3SRodney W. Grimes 	*threads = vm->threads;
48401d822d3SRodney W. Grimes 	*maxcpus = vm->maxcpus;
48501d822d3SRodney W. Grimes }
48601d822d3SRodney W. Grimes 
48701d822d3SRodney W. Grimes int
48801d822d3SRodney W. Grimes vm_set_topology(struct vm *vm, uint16_t sockets, uint16_t cores,
48901d822d3SRodney W. Grimes     uint16_t threads, uint16_t maxcpus)
49001d822d3SRodney W. Grimes {
49101d822d3SRodney W. Grimes 	if (maxcpus != 0)
49201d822d3SRodney W. Grimes 		return (EINVAL);	/* XXX remove when supported */
49301d822d3SRodney W. Grimes 	if ((sockets * cores * threads) > VM_MAXCPU)
49401d822d3SRodney W. Grimes 		return (EINVAL);
49501d822d3SRodney W. Grimes 	/* XXX need to check sockets * cores * threads == vCPU, how? */
49601d822d3SRodney W. Grimes 	vm->sockets = sockets;
49701d822d3SRodney W. Grimes 	vm->cores = cores;
49801d822d3SRodney W. Grimes 	vm->threads = threads;
49901d822d3SRodney W. Grimes 	vm->maxcpus = maxcpus;
50001d822d3SRodney W. Grimes 	return(0);
50101d822d3SRodney W. Grimes }
50201d822d3SRodney W. Grimes 
503f7d51510SNeel Natu static void
5045fcf252fSNeel Natu vm_cleanup(struct vm *vm, bool destroy)
505366f6083SPeter Grehan {
5069b1aa8d6SNeel Natu 	struct mem_map *mm;
507366f6083SPeter Grehan 	int i;
508366f6083SPeter Grehan 
509366f6083SPeter Grehan 	ppt_unassign_all(vm);
510366f6083SPeter Grehan 
511318224bbSNeel Natu 	if (vm->iommu != NULL)
512318224bbSNeel Natu 		iommu_destroy_domain(vm->iommu);
513318224bbSNeel Natu 
5140dafa5cdSNeel Natu 	if (destroy)
5150dafa5cdSNeel Natu 		vrtc_cleanup(vm->vrtc);
5160dafa5cdSNeel Natu 	else
5170dafa5cdSNeel Natu 		vrtc_reset(vm->vrtc);
518160ef77aSNeel Natu 	vpmtmr_cleanup(vm->vpmtmr);
519e883c9bbSTycho Nightingale 	vatpit_cleanup(vm->vatpit);
52008e3ff32SNeel Natu 	vhpet_cleanup(vm->vhpet);
521762fd208STycho Nightingale 	vatpic_cleanup(vm->vatpic);
52208e3ff32SNeel Natu 	vioapic_cleanup(vm->vioapic);
52308e3ff32SNeel Natu 
5245fcf252fSNeel Natu 	for (i = 0; i < VM_MAXCPU; i++)
5255fcf252fSNeel Natu 		vcpu_cleanup(vm, i, destroy);
5265fcf252fSNeel Natu 
5275fcf252fSNeel Natu 	VMCLEANUP(vm->cookie);
5285fcf252fSNeel Natu 
5299b1aa8d6SNeel Natu 	/*
5309b1aa8d6SNeel Natu 	 * System memory is removed from the guest address space only when
5319b1aa8d6SNeel Natu 	 * the VM is destroyed. This is because the mapping remains the same
5329b1aa8d6SNeel Natu 	 * across VM reset.
5339b1aa8d6SNeel Natu 	 *
5349b1aa8d6SNeel Natu 	 * Device memory can be relocated by the guest (e.g. using PCI BARs)
5359b1aa8d6SNeel Natu 	 * so those mappings are removed on a VM reset.
5369b1aa8d6SNeel Natu 	 */
5379b1aa8d6SNeel Natu 	for (i = 0; i < VM_MAX_MEMMAPS; i++) {
5389b1aa8d6SNeel Natu 		mm = &vm->mem_maps[i];
5399b1aa8d6SNeel Natu 		if (destroy || !sysmem_mapping(vm, mm))
5409b1aa8d6SNeel Natu 			vm_free_memmap(vm, i);
5419b1aa8d6SNeel Natu 	}
542f7d51510SNeel Natu 
5439b1aa8d6SNeel Natu 	if (destroy) {
5449b1aa8d6SNeel Natu 		for (i = 0; i < VM_MAX_MEMSEGS; i++)
5459b1aa8d6SNeel Natu 			vm_free_memseg(vm, i);
546366f6083SPeter Grehan 
547318224bbSNeel Natu 		VMSPACE_FREE(vm->vmspace);
5485fcf252fSNeel Natu 		vm->vmspace = NULL;
5495fcf252fSNeel Natu 	}
5505fcf252fSNeel Natu }
551366f6083SPeter Grehan 
5525fcf252fSNeel Natu void
5535fcf252fSNeel Natu vm_destroy(struct vm *vm)
5545fcf252fSNeel Natu {
5555fcf252fSNeel Natu 	vm_cleanup(vm, true);
556366f6083SPeter Grehan 	free(vm, M_VM);
557366f6083SPeter Grehan }
558366f6083SPeter Grehan 
5595fcf252fSNeel Natu int
5605fcf252fSNeel Natu vm_reinit(struct vm *vm)
5615fcf252fSNeel Natu {
5625fcf252fSNeel Natu 	int error;
5635fcf252fSNeel Natu 
5645fcf252fSNeel Natu 	/*
5655fcf252fSNeel Natu 	 * A virtual machine can be reset only if all vcpus are suspended.
5665fcf252fSNeel Natu 	 */
5675fcf252fSNeel Natu 	if (CPU_CMP(&vm->suspended_cpus, &vm->active_cpus) == 0) {
5685fcf252fSNeel Natu 		vm_cleanup(vm, false);
5695fcf252fSNeel Natu 		vm_init(vm, false);
5705fcf252fSNeel Natu 		error = 0;
5715fcf252fSNeel Natu 	} else {
5725fcf252fSNeel Natu 		error = EBUSY;
5735fcf252fSNeel Natu 	}
5745fcf252fSNeel Natu 
5755fcf252fSNeel Natu 	return (error);
5765fcf252fSNeel Natu }
5775fcf252fSNeel Natu 
578366f6083SPeter Grehan const char *
579366f6083SPeter Grehan vm_name(struct vm *vm)
580366f6083SPeter Grehan {
581366f6083SPeter Grehan 	return (vm->name);
582366f6083SPeter Grehan }
583366f6083SPeter Grehan 
584366f6083SPeter Grehan int
585366f6083SPeter Grehan vm_map_mmio(struct vm *vm, vm_paddr_t gpa, size_t len, vm_paddr_t hpa)
586366f6083SPeter Grehan {
587318224bbSNeel Natu 	vm_object_t obj;
588366f6083SPeter Grehan 
589318224bbSNeel Natu 	if ((obj = vmm_mmio_alloc(vm->vmspace, gpa, len, hpa)) == NULL)
590318224bbSNeel Natu 		return (ENOMEM);
591318224bbSNeel Natu 	else
592318224bbSNeel Natu 		return (0);
593366f6083SPeter Grehan }
594366f6083SPeter Grehan 
595366f6083SPeter Grehan int
596366f6083SPeter Grehan vm_unmap_mmio(struct vm *vm, vm_paddr_t gpa, size_t len)
597366f6083SPeter Grehan {
598366f6083SPeter Grehan 
599318224bbSNeel Natu 	vmm_mmio_free(vm->vmspace, gpa, len);
600318224bbSNeel Natu 	return (0);
601366f6083SPeter Grehan }
602366f6083SPeter Grehan 
6039b1aa8d6SNeel Natu /*
6049b1aa8d6SNeel Natu  * Return 'true' if 'gpa' is allocated in the guest address space.
6059b1aa8d6SNeel Natu  *
6069b1aa8d6SNeel Natu  * This function is called in the context of a running vcpu which acts as
6079b1aa8d6SNeel Natu  * an implicit lock on 'vm->mem_maps[]'.
6089b1aa8d6SNeel Natu  */
6099b1aa8d6SNeel Natu bool
6109b1aa8d6SNeel Natu vm_mem_allocated(struct vm *vm, int vcpuid, vm_paddr_t gpa)
611366f6083SPeter Grehan {
6129b1aa8d6SNeel Natu 	struct mem_map *mm;
613341f19c9SNeel Natu 	int i;
614341f19c9SNeel Natu 
6159b1aa8d6SNeel Natu #ifdef INVARIANTS
6169b1aa8d6SNeel Natu 	int hostcpu, state;
6179b1aa8d6SNeel Natu 	state = vcpu_get_state(vm, vcpuid, &hostcpu);
6189b1aa8d6SNeel Natu 	KASSERT(state == VCPU_RUNNING && hostcpu == curcpu,
6199b1aa8d6SNeel Natu 	    ("%s: invalid vcpu state %d/%d", __func__, state, hostcpu));
6209b1aa8d6SNeel Natu #endif
6219b1aa8d6SNeel Natu 
6229b1aa8d6SNeel Natu 	for (i = 0; i < VM_MAX_MEMMAPS; i++) {
6239b1aa8d6SNeel Natu 		mm = &vm->mem_maps[i];
6249b1aa8d6SNeel Natu 		if (mm->len != 0 && gpa >= mm->gpa && gpa < mm->gpa + mm->len)
6259b1aa8d6SNeel Natu 			return (true);		/* 'gpa' is sysmem or devmem */
626341f19c9SNeel Natu 	}
627341f19c9SNeel Natu 
628318224bbSNeel Natu 	if (ppt_is_mmio(vm, gpa))
6299b1aa8d6SNeel Natu 		return (true);			/* 'gpa' is pci passthru mmio */
630318224bbSNeel Natu 
6319b1aa8d6SNeel Natu 	return (false);
632341f19c9SNeel Natu }
633341f19c9SNeel Natu 
634341f19c9SNeel Natu int
6359b1aa8d6SNeel Natu vm_alloc_memseg(struct vm *vm, int ident, size_t len, bool sysmem)
636341f19c9SNeel Natu {
637318224bbSNeel Natu 	struct mem_seg *seg;
6389b1aa8d6SNeel Natu 	vm_object_t obj;
639366f6083SPeter Grehan 
6409b1aa8d6SNeel Natu 	if (ident < 0 || ident >= VM_MAX_MEMSEGS)
641341f19c9SNeel Natu 		return (EINVAL);
642341f19c9SNeel Natu 
6439b1aa8d6SNeel Natu 	if (len == 0 || (len & PAGE_MASK))
6449b1aa8d6SNeel Natu 		return (EINVAL);
645341f19c9SNeel Natu 
6469b1aa8d6SNeel Natu 	seg = &vm->mem_segs[ident];
6479b1aa8d6SNeel Natu 	if (seg->object != NULL) {
6489b1aa8d6SNeel Natu 		if (seg->len == len && seg->sysmem == sysmem)
6499b1aa8d6SNeel Natu 			return (EEXIST);
6509b1aa8d6SNeel Natu 		else
6519b1aa8d6SNeel Natu 			return (EINVAL);
652341f19c9SNeel Natu 	}
653341f19c9SNeel Natu 
6549b1aa8d6SNeel Natu 	obj = vm_object_allocate(OBJT_DEFAULT, len >> PAGE_SHIFT);
6559b1aa8d6SNeel Natu 	if (obj == NULL)
656318224bbSNeel Natu 		return (ENOMEM);
657318224bbSNeel Natu 
658318224bbSNeel Natu 	seg->len = len;
6599b1aa8d6SNeel Natu 	seg->object = obj;
6609b1aa8d6SNeel Natu 	seg->sysmem = sysmem;
661366f6083SPeter Grehan 	return (0);
662366f6083SPeter Grehan }
663366f6083SPeter Grehan 
6649b1aa8d6SNeel Natu int
6659b1aa8d6SNeel Natu vm_get_memseg(struct vm *vm, int ident, size_t *len, bool *sysmem,
6669b1aa8d6SNeel Natu     vm_object_t *objptr)
667477867a0SNeel Natu {
6689b1aa8d6SNeel Natu 	struct mem_seg *seg;
669477867a0SNeel Natu 
6709b1aa8d6SNeel Natu 	if (ident < 0 || ident >= VM_MAX_MEMSEGS)
6719b1aa8d6SNeel Natu 		return (EINVAL);
6729b1aa8d6SNeel Natu 
6739b1aa8d6SNeel Natu 	seg = &vm->mem_segs[ident];
6749b1aa8d6SNeel Natu 	if (len)
6759b1aa8d6SNeel Natu 		*len = seg->len;
6769b1aa8d6SNeel Natu 	if (sysmem)
6779b1aa8d6SNeel Natu 		*sysmem = seg->sysmem;
6789b1aa8d6SNeel Natu 	if (objptr)
6799b1aa8d6SNeel Natu 		*objptr = seg->object;
6809b1aa8d6SNeel Natu 	return (0);
681477867a0SNeel Natu }
6829b1aa8d6SNeel Natu 
6839b1aa8d6SNeel Natu void
6849b1aa8d6SNeel Natu vm_free_memseg(struct vm *vm, int ident)
6859b1aa8d6SNeel Natu {
6869b1aa8d6SNeel Natu 	struct mem_seg *seg;
6879b1aa8d6SNeel Natu 
6889b1aa8d6SNeel Natu 	KASSERT(ident >= 0 && ident < VM_MAX_MEMSEGS,
6899b1aa8d6SNeel Natu 	    ("%s: invalid memseg ident %d", __func__, ident));
6909b1aa8d6SNeel Natu 
6919b1aa8d6SNeel Natu 	seg = &vm->mem_segs[ident];
6929b1aa8d6SNeel Natu 	if (seg->object != NULL) {
6939b1aa8d6SNeel Natu 		vm_object_deallocate(seg->object);
6949b1aa8d6SNeel Natu 		bzero(seg, sizeof(struct mem_seg));
6959b1aa8d6SNeel Natu 	}
6969b1aa8d6SNeel Natu }
6979b1aa8d6SNeel Natu 
6989b1aa8d6SNeel Natu int
6999b1aa8d6SNeel Natu vm_mmap_memseg(struct vm *vm, vm_paddr_t gpa, int segid, vm_ooffset_t first,
7009b1aa8d6SNeel Natu     size_t len, int prot, int flags)
7019b1aa8d6SNeel Natu {
7029b1aa8d6SNeel Natu 	struct mem_seg *seg;
7039b1aa8d6SNeel Natu 	struct mem_map *m, *map;
7049b1aa8d6SNeel Natu 	vm_ooffset_t last;
7059b1aa8d6SNeel Natu 	int i, error;
7069b1aa8d6SNeel Natu 
7079b1aa8d6SNeel Natu 	if (prot == 0 || (prot & ~(VM_PROT_ALL)) != 0)
7089b1aa8d6SNeel Natu 		return (EINVAL);
7099b1aa8d6SNeel Natu 
7109b1aa8d6SNeel Natu 	if (flags & ~VM_MEMMAP_F_WIRED)
7119b1aa8d6SNeel Natu 		return (EINVAL);
7129b1aa8d6SNeel Natu 
7139b1aa8d6SNeel Natu 	if (segid < 0 || segid >= VM_MAX_MEMSEGS)
7149b1aa8d6SNeel Natu 		return (EINVAL);
7159b1aa8d6SNeel Natu 
7169b1aa8d6SNeel Natu 	seg = &vm->mem_segs[segid];
7179b1aa8d6SNeel Natu 	if (seg->object == NULL)
7189b1aa8d6SNeel Natu 		return (EINVAL);
7199b1aa8d6SNeel Natu 
7209b1aa8d6SNeel Natu 	last = first + len;
7219b1aa8d6SNeel Natu 	if (first < 0 || first >= last || last > seg->len)
7229b1aa8d6SNeel Natu 		return (EINVAL);
7239b1aa8d6SNeel Natu 
7249b1aa8d6SNeel Natu 	if ((gpa | first | last) & PAGE_MASK)
7259b1aa8d6SNeel Natu 		return (EINVAL);
7269b1aa8d6SNeel Natu 
7279b1aa8d6SNeel Natu 	map = NULL;
7289b1aa8d6SNeel Natu 	for (i = 0; i < VM_MAX_MEMMAPS; i++) {
7299b1aa8d6SNeel Natu 		m = &vm->mem_maps[i];
7309b1aa8d6SNeel Natu 		if (m->len == 0) {
7319b1aa8d6SNeel Natu 			map = m;
7329b1aa8d6SNeel Natu 			break;
7339b1aa8d6SNeel Natu 		}
7349b1aa8d6SNeel Natu 	}
7359b1aa8d6SNeel Natu 
7369b1aa8d6SNeel Natu 	if (map == NULL)
7379b1aa8d6SNeel Natu 		return (ENOSPC);
7389b1aa8d6SNeel Natu 
7399b1aa8d6SNeel Natu 	error = vm_map_find(&vm->vmspace->vm_map, seg->object, first, &gpa,
7409b1aa8d6SNeel Natu 	    len, 0, VMFS_NO_SPACE, prot, prot, 0);
7419b1aa8d6SNeel Natu 	if (error != KERN_SUCCESS)
7429b1aa8d6SNeel Natu 		return (EFAULT);
7439b1aa8d6SNeel Natu 
7449b1aa8d6SNeel Natu 	vm_object_reference(seg->object);
7459b1aa8d6SNeel Natu 
7469b1aa8d6SNeel Natu 	if (flags & VM_MEMMAP_F_WIRED) {
7479b1aa8d6SNeel Natu 		error = vm_map_wire(&vm->vmspace->vm_map, gpa, gpa + len,
7489b1aa8d6SNeel Natu 		    VM_MAP_WIRE_USER | VM_MAP_WIRE_NOHOLES);
7499b1aa8d6SNeel Natu 		if (error != KERN_SUCCESS) {
7509b1aa8d6SNeel Natu 			vm_map_remove(&vm->vmspace->vm_map, gpa, gpa + len);
7519b1aa8d6SNeel Natu 			return (EFAULT);
7529b1aa8d6SNeel Natu 		}
7539b1aa8d6SNeel Natu 	}
7549b1aa8d6SNeel Natu 
7559b1aa8d6SNeel Natu 	map->gpa = gpa;
7569b1aa8d6SNeel Natu 	map->len = len;
7579b1aa8d6SNeel Natu 	map->segoff = first;
7589b1aa8d6SNeel Natu 	map->segid = segid;
7599b1aa8d6SNeel Natu 	map->prot = prot;
7609b1aa8d6SNeel Natu 	map->flags = flags;
7619b1aa8d6SNeel Natu 	return (0);
7629b1aa8d6SNeel Natu }
7639b1aa8d6SNeel Natu 
7649b1aa8d6SNeel Natu int
7659b1aa8d6SNeel Natu vm_mmap_getnext(struct vm *vm, vm_paddr_t *gpa, int *segid,
7669b1aa8d6SNeel Natu     vm_ooffset_t *segoff, size_t *len, int *prot, int *flags)
7679b1aa8d6SNeel Natu {
7689b1aa8d6SNeel Natu 	struct mem_map *mm, *mmnext;
7699b1aa8d6SNeel Natu 	int i;
7709b1aa8d6SNeel Natu 
7719b1aa8d6SNeel Natu 	mmnext = NULL;
7729b1aa8d6SNeel Natu 	for (i = 0; i < VM_MAX_MEMMAPS; i++) {
7739b1aa8d6SNeel Natu 		mm = &vm->mem_maps[i];
7749b1aa8d6SNeel Natu 		if (mm->len == 0 || mm->gpa < *gpa)
7759b1aa8d6SNeel Natu 			continue;
7769b1aa8d6SNeel Natu 		if (mmnext == NULL || mm->gpa < mmnext->gpa)
7779b1aa8d6SNeel Natu 			mmnext = mm;
7789b1aa8d6SNeel Natu 	}
7799b1aa8d6SNeel Natu 
7809b1aa8d6SNeel Natu 	if (mmnext != NULL) {
7819b1aa8d6SNeel Natu 		*gpa = mmnext->gpa;
7829b1aa8d6SNeel Natu 		if (segid)
7839b1aa8d6SNeel Natu 			*segid = mmnext->segid;
7849b1aa8d6SNeel Natu 		if (segoff)
7859b1aa8d6SNeel Natu 			*segoff = mmnext->segoff;
7869b1aa8d6SNeel Natu 		if (len)
7879b1aa8d6SNeel Natu 			*len = mmnext->len;
7889b1aa8d6SNeel Natu 		if (prot)
7899b1aa8d6SNeel Natu 			*prot = mmnext->prot;
7909b1aa8d6SNeel Natu 		if (flags)
7919b1aa8d6SNeel Natu 			*flags = mmnext->flags;
7929b1aa8d6SNeel Natu 		return (0);
7939b1aa8d6SNeel Natu 	} else {
7949b1aa8d6SNeel Natu 		return (ENOENT);
7959b1aa8d6SNeel Natu 	}
796477867a0SNeel Natu }
797477867a0SNeel Natu 
798318224bbSNeel Natu static void
7999b1aa8d6SNeel Natu vm_free_memmap(struct vm *vm, int ident)
800366f6083SPeter Grehan {
8019b1aa8d6SNeel Natu 	struct mem_map *mm;
8029b1aa8d6SNeel Natu 	int error;
8034db4fb2cSNeel Natu 
8049b1aa8d6SNeel Natu 	mm = &vm->mem_maps[ident];
8059b1aa8d6SNeel Natu 	if (mm->len) {
8069b1aa8d6SNeel Natu 		error = vm_map_remove(&vm->vmspace->vm_map, mm->gpa,
8079b1aa8d6SNeel Natu 		    mm->gpa + mm->len);
8089b1aa8d6SNeel Natu 		KASSERT(error == KERN_SUCCESS, ("%s: vm_map_remove error %d",
8099b1aa8d6SNeel Natu 		    __func__, error));
8109b1aa8d6SNeel Natu 		bzero(mm, sizeof(struct mem_map));
811318224bbSNeel Natu 	}
812318224bbSNeel Natu }
813318224bbSNeel Natu 
8149b1aa8d6SNeel Natu static __inline bool
8159b1aa8d6SNeel Natu sysmem_mapping(struct vm *vm, struct mem_map *mm)
816318224bbSNeel Natu {
817318224bbSNeel Natu 
8189b1aa8d6SNeel Natu 	if (mm->len != 0 && vm->mem_segs[mm->segid].sysmem)
8199b1aa8d6SNeel Natu 		return (true);
8209b1aa8d6SNeel Natu 	else
8219b1aa8d6SNeel Natu 		return (false);
822318224bbSNeel Natu }
823318224bbSNeel Natu 
824*147d12a7SAntoine Brodin vm_paddr_t
825*147d12a7SAntoine Brodin vmm_sysmem_maxaddr(struct vm *vm)
8269b1aa8d6SNeel Natu {
8279b1aa8d6SNeel Natu 	struct mem_map *mm;
8289b1aa8d6SNeel Natu 	vm_paddr_t maxaddr;
8299b1aa8d6SNeel Natu 	int i;
830318224bbSNeel Natu 
8319b1aa8d6SNeel Natu 	maxaddr = 0;
8329b1aa8d6SNeel Natu 	for (i = 0; i < VM_MAX_MEMMAPS; i++) {
8339b1aa8d6SNeel Natu 		mm = &vm->mem_maps[i];
8349b1aa8d6SNeel Natu 		if (sysmem_mapping(vm, mm)) {
8359b1aa8d6SNeel Natu 			if (maxaddr < mm->gpa + mm->len)
8369b1aa8d6SNeel Natu 				maxaddr = mm->gpa + mm->len;
8379b1aa8d6SNeel Natu 		}
8389b1aa8d6SNeel Natu 	}
8399b1aa8d6SNeel Natu 	return (maxaddr);
840318224bbSNeel Natu }
841318224bbSNeel Natu 
842318224bbSNeel Natu static void
843318224bbSNeel Natu vm_iommu_modify(struct vm *vm, boolean_t map)
844318224bbSNeel Natu {
845318224bbSNeel Natu 	int i, sz;
846318224bbSNeel Natu 	vm_paddr_t gpa, hpa;
8479b1aa8d6SNeel Natu 	struct mem_map *mm;
848318224bbSNeel Natu 	void *vp, *cookie, *host_domain;
849318224bbSNeel Natu 
850318224bbSNeel Natu 	sz = PAGE_SIZE;
851318224bbSNeel Natu 	host_domain = iommu_host_domain();
852318224bbSNeel Natu 
8539b1aa8d6SNeel Natu 	for (i = 0; i < VM_MAX_MEMMAPS; i++) {
8549b1aa8d6SNeel Natu 		mm = &vm->mem_maps[i];
8559b1aa8d6SNeel Natu 		if (!sysmem_mapping(vm, mm))
8569b1aa8d6SNeel Natu 			continue;
857318224bbSNeel Natu 
8589b1aa8d6SNeel Natu 		if (map) {
8599b1aa8d6SNeel Natu 			KASSERT((mm->flags & VM_MEMMAP_F_IOMMU) == 0,
8609b1aa8d6SNeel Natu 			    ("iommu map found invalid memmap %#lx/%#lx/%#x",
8619b1aa8d6SNeel Natu 			    mm->gpa, mm->len, mm->flags));
8629b1aa8d6SNeel Natu 			if ((mm->flags & VM_MEMMAP_F_WIRED) == 0)
8639b1aa8d6SNeel Natu 				continue;
8649b1aa8d6SNeel Natu 			mm->flags |= VM_MEMMAP_F_IOMMU;
8659b1aa8d6SNeel Natu 		} else {
8669b1aa8d6SNeel Natu 			if ((mm->flags & VM_MEMMAP_F_IOMMU) == 0)
8679b1aa8d6SNeel Natu 				continue;
8689b1aa8d6SNeel Natu 			mm->flags &= ~VM_MEMMAP_F_IOMMU;
8699b1aa8d6SNeel Natu 			KASSERT((mm->flags & VM_MEMMAP_F_WIRED) != 0,
8709b1aa8d6SNeel Natu 			    ("iommu unmap found invalid memmap %#lx/%#lx/%#x",
8719b1aa8d6SNeel Natu 			    mm->gpa, mm->len, mm->flags));
8729b1aa8d6SNeel Natu 		}
8739b1aa8d6SNeel Natu 
8749b1aa8d6SNeel Natu 		gpa = mm->gpa;
8759b1aa8d6SNeel Natu 		while (gpa < mm->gpa + mm->len) {
8769b1aa8d6SNeel Natu 			vp = vm_gpa_hold(vm, -1, gpa, PAGE_SIZE, VM_PROT_WRITE,
877318224bbSNeel Natu 					 &cookie);
878318224bbSNeel Natu 			KASSERT(vp != NULL, ("vm(%s) could not map gpa %#lx",
879318224bbSNeel Natu 			    vm_name(vm), gpa));
880318224bbSNeel Natu 
881318224bbSNeel Natu 			vm_gpa_release(cookie);
882318224bbSNeel Natu 
883318224bbSNeel Natu 			hpa = DMAP_TO_PHYS((uintptr_t)vp);
884318224bbSNeel Natu 			if (map) {
885318224bbSNeel Natu 				iommu_create_mapping(vm->iommu, gpa, hpa, sz);
886318224bbSNeel Natu 				iommu_remove_mapping(host_domain, hpa, sz);
887318224bbSNeel Natu 			} else {
888318224bbSNeel Natu 				iommu_remove_mapping(vm->iommu, gpa, sz);
889318224bbSNeel Natu 				iommu_create_mapping(host_domain, hpa, hpa, sz);
890318224bbSNeel Natu 			}
891318224bbSNeel Natu 
892318224bbSNeel Natu 			gpa += PAGE_SIZE;
893318224bbSNeel Natu 		}
894318224bbSNeel Natu 	}
895318224bbSNeel Natu 
896318224bbSNeel Natu 	/*
897318224bbSNeel Natu 	 * Invalidate the cached translations associated with the domain
898318224bbSNeel Natu 	 * from which pages were removed.
899318224bbSNeel Natu 	 */
900318224bbSNeel Natu 	if (map)
901318224bbSNeel Natu 		iommu_invalidate_tlb(host_domain);
902318224bbSNeel Natu 	else
903318224bbSNeel Natu 		iommu_invalidate_tlb(vm->iommu);
904318224bbSNeel Natu }
905318224bbSNeel Natu 
906318224bbSNeel Natu #define	vm_iommu_unmap(vm)	vm_iommu_modify((vm), FALSE)
907318224bbSNeel Natu #define	vm_iommu_map(vm)	vm_iommu_modify((vm), TRUE)
908318224bbSNeel Natu 
909318224bbSNeel Natu int
910318224bbSNeel Natu vm_unassign_pptdev(struct vm *vm, int bus, int slot, int func)
911318224bbSNeel Natu {
912318224bbSNeel Natu 	int error;
913318224bbSNeel Natu 
914318224bbSNeel Natu 	error = ppt_unassign_device(vm, bus, slot, func);
915318224bbSNeel Natu 	if (error)
916318224bbSNeel Natu 		return (error);
917318224bbSNeel Natu 
9189b1aa8d6SNeel Natu 	if (ppt_assigned_devices(vm) == 0)
919318224bbSNeel Natu 		vm_iommu_unmap(vm);
9209b1aa8d6SNeel Natu 
921318224bbSNeel Natu 	return (0);
922318224bbSNeel Natu }
923318224bbSNeel Natu 
924318224bbSNeel Natu int
925318224bbSNeel Natu vm_assign_pptdev(struct vm *vm, int bus, int slot, int func)
926318224bbSNeel Natu {
927318224bbSNeel Natu 	int error;
928318224bbSNeel Natu 	vm_paddr_t maxaddr;
929318224bbSNeel Natu 
9309b1aa8d6SNeel Natu 	/* Set up the IOMMU to do the 'gpa' to 'hpa' translation */
93151f45d01SNeel Natu 	if (ppt_assigned_devices(vm) == 0) {
932318224bbSNeel Natu 		KASSERT(vm->iommu == NULL,
933318224bbSNeel Natu 		    ("vm_assign_pptdev: iommu must be NULL"));
934*147d12a7SAntoine Brodin 		maxaddr = vmm_sysmem_maxaddr(vm);
935318224bbSNeel Natu 		vm->iommu = iommu_create_domain(maxaddr);
936ffe1b10dSJohn Baldwin 		if (vm->iommu == NULL)
937ffe1b10dSJohn Baldwin 			return (ENXIO);
938318224bbSNeel Natu 		vm_iommu_map(vm);
939318224bbSNeel Natu 	}
940318224bbSNeel Natu 
941318224bbSNeel Natu 	error = ppt_assign_device(vm, bus, slot, func);
942318224bbSNeel Natu 	return (error);
943318224bbSNeel Natu }
944318224bbSNeel Natu 
945318224bbSNeel Natu void *
9469b1aa8d6SNeel Natu vm_gpa_hold(struct vm *vm, int vcpuid, vm_paddr_t gpa, size_t len, int reqprot,
947318224bbSNeel Natu 	    void **cookie)
948318224bbSNeel Natu {
9499b1aa8d6SNeel Natu 	int i, count, pageoff;
9509b1aa8d6SNeel Natu 	struct mem_map *mm;
951318224bbSNeel Natu 	vm_page_t m;
9529b1aa8d6SNeel Natu #ifdef INVARIANTS
9539b1aa8d6SNeel Natu 	/*
9549b1aa8d6SNeel Natu 	 * All vcpus are frozen by ioctls that modify the memory map
9559b1aa8d6SNeel Natu 	 * (e.g. VM_MMAP_MEMSEG). Therefore 'vm->memmap[]' stability is
9569b1aa8d6SNeel Natu 	 * guaranteed if at least one vcpu is in the VCPU_FROZEN state.
9579b1aa8d6SNeel Natu 	 */
9589b1aa8d6SNeel Natu 	int state;
9592de70600SJohn Baldwin 	KASSERT(vcpuid >= -1 && vcpuid < VM_MAXCPU, ("%s: invalid vcpuid %d",
9609b1aa8d6SNeel Natu 	    __func__, vcpuid));
9619b1aa8d6SNeel Natu 	for (i = 0; i < VM_MAXCPU; i++) {
9629b1aa8d6SNeel Natu 		if (vcpuid != -1 && vcpuid != i)
9639b1aa8d6SNeel Natu 			continue;
9649b1aa8d6SNeel Natu 		state = vcpu_get_state(vm, i, NULL);
9659b1aa8d6SNeel Natu 		KASSERT(state == VCPU_FROZEN, ("%s: invalid vcpu state %d",
9669b1aa8d6SNeel Natu 		    __func__, state));
9679b1aa8d6SNeel Natu 	}
9689b1aa8d6SNeel Natu #endif
969318224bbSNeel Natu 	pageoff = gpa & PAGE_MASK;
970318224bbSNeel Natu 	if (len > PAGE_SIZE - pageoff)
971318224bbSNeel Natu 		panic("vm_gpa_hold: invalid gpa/len: 0x%016lx/%lu", gpa, len);
972318224bbSNeel Natu 
9739b1aa8d6SNeel Natu 	count = 0;
9749b1aa8d6SNeel Natu 	for (i = 0; i < VM_MAX_MEMMAPS; i++) {
9759b1aa8d6SNeel Natu 		mm = &vm->mem_maps[i];
9769b1aa8d6SNeel Natu 		if (sysmem_mapping(vm, mm) && gpa >= mm->gpa &&
9779b1aa8d6SNeel Natu 		    gpa < mm->gpa + mm->len) {
978318224bbSNeel Natu 			count = vm_fault_quick_hold_pages(&vm->vmspace->vm_map,
979318224bbSNeel Natu 			    trunc_page(gpa), PAGE_SIZE, reqprot, &m, 1);
9809b1aa8d6SNeel Natu 			break;
9819b1aa8d6SNeel Natu 		}
9829b1aa8d6SNeel Natu 	}
983318224bbSNeel Natu 
984318224bbSNeel Natu 	if (count == 1) {
985318224bbSNeel Natu 		*cookie = m;
986318224bbSNeel Natu 		return ((void *)(PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m)) + pageoff));
987318224bbSNeel Natu 	} else {
988318224bbSNeel Natu 		*cookie = NULL;
989318224bbSNeel Natu 		return (NULL);
990318224bbSNeel Natu 	}
991318224bbSNeel Natu }
992318224bbSNeel Natu 
993318224bbSNeel Natu void
994318224bbSNeel Natu vm_gpa_release(void *cookie)
995318224bbSNeel Natu {
996318224bbSNeel Natu 	vm_page_t m = cookie;
997318224bbSNeel Natu 
998318224bbSNeel Natu 	vm_page_lock(m);
999318224bbSNeel Natu 	vm_page_unhold(m);
1000318224bbSNeel Natu 	vm_page_unlock(m);
1001366f6083SPeter Grehan }
1002366f6083SPeter Grehan 
1003366f6083SPeter Grehan int
1004366f6083SPeter Grehan vm_get_register(struct vm *vm, int vcpu, int reg, uint64_t *retval)
1005366f6083SPeter Grehan {
1006366f6083SPeter Grehan 
1007366f6083SPeter Grehan 	if (vcpu < 0 || vcpu >= VM_MAXCPU)
1008366f6083SPeter Grehan 		return (EINVAL);
1009366f6083SPeter Grehan 
1010366f6083SPeter Grehan 	if (reg >= VM_REG_LAST)
1011366f6083SPeter Grehan 		return (EINVAL);
1012366f6083SPeter Grehan 
1013366f6083SPeter Grehan 	return (VMGETREG(vm->cookie, vcpu, reg, retval));
1014366f6083SPeter Grehan }
1015366f6083SPeter Grehan 
1016366f6083SPeter Grehan int
1017d087a399SNeel Natu vm_set_register(struct vm *vm, int vcpuid, int reg, uint64_t val)
1018366f6083SPeter Grehan {
1019d087a399SNeel Natu 	struct vcpu *vcpu;
1020d087a399SNeel Natu 	int error;
1021366f6083SPeter Grehan 
1022d087a399SNeel Natu 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
1023366f6083SPeter Grehan 		return (EINVAL);
1024366f6083SPeter Grehan 
1025366f6083SPeter Grehan 	if (reg >= VM_REG_LAST)
1026366f6083SPeter Grehan 		return (EINVAL);
1027366f6083SPeter Grehan 
1028d087a399SNeel Natu 	error = VMSETREG(vm->cookie, vcpuid, reg, val);
1029d087a399SNeel Natu 	if (error || reg != VM_REG_GUEST_RIP)
1030d087a399SNeel Natu 		return (error);
1031d087a399SNeel Natu 
1032d087a399SNeel Natu 	/* Set 'nextrip' to match the value of %rip */
1033d087a399SNeel Natu 	VCPU_CTR1(vm, vcpuid, "Setting nextrip to %#lx", val);
1034d087a399SNeel Natu 	vcpu = &vm->vcpu[vcpuid];
1035d087a399SNeel Natu 	vcpu->nextrip = val;
1036d087a399SNeel Natu 	return (0);
1037366f6083SPeter Grehan }
1038366f6083SPeter Grehan 
1039366f6083SPeter Grehan static boolean_t
1040366f6083SPeter Grehan is_descriptor_table(int reg)
1041366f6083SPeter Grehan {
1042366f6083SPeter Grehan 
1043366f6083SPeter Grehan 	switch (reg) {
1044366f6083SPeter Grehan 	case VM_REG_GUEST_IDTR:
1045366f6083SPeter Grehan 	case VM_REG_GUEST_GDTR:
1046366f6083SPeter Grehan 		return (TRUE);
1047366f6083SPeter Grehan 	default:
1048366f6083SPeter Grehan 		return (FALSE);
1049366f6083SPeter Grehan 	}
1050366f6083SPeter Grehan }
1051366f6083SPeter Grehan 
1052366f6083SPeter Grehan static boolean_t
1053366f6083SPeter Grehan is_segment_register(int reg)
1054366f6083SPeter Grehan {
1055366f6083SPeter Grehan 
1056366f6083SPeter Grehan 	switch (reg) {
1057366f6083SPeter Grehan 	case VM_REG_GUEST_ES:
1058366f6083SPeter Grehan 	case VM_REG_GUEST_CS:
1059366f6083SPeter Grehan 	case VM_REG_GUEST_SS:
1060366f6083SPeter Grehan 	case VM_REG_GUEST_DS:
1061366f6083SPeter Grehan 	case VM_REG_GUEST_FS:
1062366f6083SPeter Grehan 	case VM_REG_GUEST_GS:
1063366f6083SPeter Grehan 	case VM_REG_GUEST_TR:
1064366f6083SPeter Grehan 	case VM_REG_GUEST_LDTR:
1065366f6083SPeter Grehan 		return (TRUE);
1066366f6083SPeter Grehan 	default:
1067366f6083SPeter Grehan 		return (FALSE);
1068366f6083SPeter Grehan 	}
1069366f6083SPeter Grehan }
1070366f6083SPeter Grehan 
1071366f6083SPeter Grehan int
1072366f6083SPeter Grehan vm_get_seg_desc(struct vm *vm, int vcpu, int reg,
1073366f6083SPeter Grehan 		struct seg_desc *desc)
1074366f6083SPeter Grehan {
1075366f6083SPeter Grehan 
1076366f6083SPeter Grehan 	if (vcpu < 0 || vcpu >= VM_MAXCPU)
1077366f6083SPeter Grehan 		return (EINVAL);
1078366f6083SPeter Grehan 
1079366f6083SPeter Grehan 	if (!is_segment_register(reg) && !is_descriptor_table(reg))
1080366f6083SPeter Grehan 		return (EINVAL);
1081366f6083SPeter Grehan 
1082366f6083SPeter Grehan 	return (VMGETDESC(vm->cookie, vcpu, reg, desc));
1083366f6083SPeter Grehan }
1084366f6083SPeter Grehan 
1085366f6083SPeter Grehan int
1086366f6083SPeter Grehan vm_set_seg_desc(struct vm *vm, int vcpu, int reg,
1087366f6083SPeter Grehan 		struct seg_desc *desc)
1088366f6083SPeter Grehan {
1089366f6083SPeter Grehan 	if (vcpu < 0 || vcpu >= VM_MAXCPU)
1090366f6083SPeter Grehan 		return (EINVAL);
1091366f6083SPeter Grehan 
1092366f6083SPeter Grehan 	if (!is_segment_register(reg) && !is_descriptor_table(reg))
1093366f6083SPeter Grehan 		return (EINVAL);
1094366f6083SPeter Grehan 
1095366f6083SPeter Grehan 	return (VMSETDESC(vm->cookie, vcpu, reg, desc));
1096366f6083SPeter Grehan }
1097366f6083SPeter Grehan 
1098366f6083SPeter Grehan static void
1099366f6083SPeter Grehan restore_guest_fpustate(struct vcpu *vcpu)
1100366f6083SPeter Grehan {
1101366f6083SPeter Grehan 
110238f1b189SPeter Grehan 	/* flush host state to the pcb */
110338f1b189SPeter Grehan 	fpuexit(curthread);
1104bd8572e0SNeel Natu 
1105bd8572e0SNeel Natu 	/* restore guest FPU state */
1106366f6083SPeter Grehan 	fpu_stop_emulating();
110738f1b189SPeter Grehan 	fpurestore(vcpu->guestfpu);
1108bd8572e0SNeel Natu 
1109abb023fbSJohn Baldwin 	/* restore guest XCR0 if XSAVE is enabled in the host */
1110abb023fbSJohn Baldwin 	if (rcr4() & CR4_XSAVE)
1111abb023fbSJohn Baldwin 		load_xcr(0, vcpu->guest_xcr0);
1112abb023fbSJohn Baldwin 
1113bd8572e0SNeel Natu 	/*
1114bd8572e0SNeel Natu 	 * The FPU is now "dirty" with the guest's state so turn on emulation
1115bd8572e0SNeel Natu 	 * to trap any access to the FPU by the host.
1116bd8572e0SNeel Natu 	 */
1117bd8572e0SNeel Natu 	fpu_start_emulating();
1118366f6083SPeter Grehan }
1119366f6083SPeter Grehan 
1120366f6083SPeter Grehan static void
1121366f6083SPeter Grehan save_guest_fpustate(struct vcpu *vcpu)
1122366f6083SPeter Grehan {
1123366f6083SPeter Grehan 
1124bd8572e0SNeel Natu 	if ((rcr0() & CR0_TS) == 0)
1125bd8572e0SNeel Natu 		panic("fpu emulation not enabled in host!");
1126bd8572e0SNeel Natu 
1127abb023fbSJohn Baldwin 	/* save guest XCR0 and restore host XCR0 */
1128abb023fbSJohn Baldwin 	if (rcr4() & CR4_XSAVE) {
1129abb023fbSJohn Baldwin 		vcpu->guest_xcr0 = rxcr(0);
1130abb023fbSJohn Baldwin 		load_xcr(0, vmm_get_host_xcr0());
1131abb023fbSJohn Baldwin 	}
1132abb023fbSJohn Baldwin 
1133bd8572e0SNeel Natu 	/* save guest FPU state */
1134bd8572e0SNeel Natu 	fpu_stop_emulating();
113538f1b189SPeter Grehan 	fpusave(vcpu->guestfpu);
1136366f6083SPeter Grehan 	fpu_start_emulating();
1137366f6083SPeter Grehan }
1138366f6083SPeter Grehan 
113961592433SNeel Natu static VMM_STAT(VCPU_IDLE_TICKS, "number of ticks vcpu was idle");
1140f76fc5d4SNeel Natu 
1141318224bbSNeel Natu static int
1142248e6799SNeel Natu vcpu_set_state_locked(struct vm *vm, int vcpuid, enum vcpu_state newstate,
1143f80330a8SNeel Natu     bool from_idle)
1144366f6083SPeter Grehan {
1145248e6799SNeel Natu 	struct vcpu *vcpu;
1146318224bbSNeel Natu 	int error;
1147366f6083SPeter Grehan 
1148248e6799SNeel Natu 	vcpu = &vm->vcpu[vcpuid];
1149318224bbSNeel Natu 	vcpu_assert_locked(vcpu);
1150366f6083SPeter Grehan 
1151f76fc5d4SNeel Natu 	/*
1152f80330a8SNeel Natu 	 * State transitions from the vmmdev_ioctl() must always begin from
1153f80330a8SNeel Natu 	 * the VCPU_IDLE state. This guarantees that there is only a single
1154f80330a8SNeel Natu 	 * ioctl() operating on a vcpu at any point.
1155f80330a8SNeel Natu 	 */
1156f80330a8SNeel Natu 	if (from_idle) {
1157248e6799SNeel Natu 		while (vcpu->state != VCPU_IDLE) {
1158248e6799SNeel Natu 			vcpu->reqidle = 1;
1159248e6799SNeel Natu 			vcpu_notify_event_locked(vcpu, false);
1160248e6799SNeel Natu 			VCPU_CTR1(vm, vcpuid, "vcpu state change from %s to "
1161248e6799SNeel Natu 			    "idle requested", vcpu_state2str(vcpu->state));
1162f80330a8SNeel Natu 			msleep_spin(&vcpu->state, &vcpu->mtx, "vmstat", hz);
1163248e6799SNeel Natu 		}
1164f80330a8SNeel Natu 	} else {
1165f80330a8SNeel Natu 		KASSERT(vcpu->state != VCPU_IDLE, ("invalid transition from "
1166f80330a8SNeel Natu 		    "vcpu idle state"));
1167f80330a8SNeel Natu 	}
1168f80330a8SNeel Natu 
1169ef39d7e9SNeel Natu 	if (vcpu->state == VCPU_RUNNING) {
1170ef39d7e9SNeel Natu 		KASSERT(vcpu->hostcpu == curcpu, ("curcpu %d and hostcpu %d "
1171ef39d7e9SNeel Natu 		    "mismatch for running vcpu", curcpu, vcpu->hostcpu));
1172ef39d7e9SNeel Natu 	} else {
1173ef39d7e9SNeel Natu 		KASSERT(vcpu->hostcpu == NOCPU, ("Invalid hostcpu %d for a "
1174ef39d7e9SNeel Natu 		    "vcpu that is not running", vcpu->hostcpu));
1175ef39d7e9SNeel Natu 	}
1176ef39d7e9SNeel Natu 
1177f80330a8SNeel Natu 	/*
1178318224bbSNeel Natu 	 * The following state transitions are allowed:
1179318224bbSNeel Natu 	 * IDLE -> FROZEN -> IDLE
1180318224bbSNeel Natu 	 * FROZEN -> RUNNING -> FROZEN
1181318224bbSNeel Natu 	 * FROZEN -> SLEEPING -> FROZEN
1182f76fc5d4SNeel Natu 	 */
1183318224bbSNeel Natu 	switch (vcpu->state) {
1184318224bbSNeel Natu 	case VCPU_IDLE:
1185318224bbSNeel Natu 	case VCPU_RUNNING:
1186318224bbSNeel Natu 	case VCPU_SLEEPING:
1187318224bbSNeel Natu 		error = (newstate != VCPU_FROZEN);
1188318224bbSNeel Natu 		break;
1189318224bbSNeel Natu 	case VCPU_FROZEN:
1190318224bbSNeel Natu 		error = (newstate == VCPU_FROZEN);
1191318224bbSNeel Natu 		break;
1192318224bbSNeel Natu 	default:
1193318224bbSNeel Natu 		error = 1;
1194318224bbSNeel Natu 		break;
1195318224bbSNeel Natu 	}
1196318224bbSNeel Natu 
1197f80330a8SNeel Natu 	if (error)
1198f80330a8SNeel Natu 		return (EBUSY);
1199318224bbSNeel Natu 
1200248e6799SNeel Natu 	VCPU_CTR2(vm, vcpuid, "vcpu state changed from %s to %s",
1201248e6799SNeel Natu 	    vcpu_state2str(vcpu->state), vcpu_state2str(newstate));
1202248e6799SNeel Natu 
1203f80330a8SNeel Natu 	vcpu->state = newstate;
1204ef39d7e9SNeel Natu 	if (newstate == VCPU_RUNNING)
1205ef39d7e9SNeel Natu 		vcpu->hostcpu = curcpu;
1206ef39d7e9SNeel Natu 	else
1207ef39d7e9SNeel Natu 		vcpu->hostcpu = NOCPU;
1208ef39d7e9SNeel Natu 
1209f80330a8SNeel Natu 	if (newstate == VCPU_IDLE)
1210f80330a8SNeel Natu 		wakeup(&vcpu->state);
1211f80330a8SNeel Natu 
1212f80330a8SNeel Natu 	return (0);
1213318224bbSNeel Natu }
1214318224bbSNeel Natu 
1215318224bbSNeel Natu static void
1216318224bbSNeel Natu vcpu_require_state(struct vm *vm, int vcpuid, enum vcpu_state newstate)
1217318224bbSNeel Natu {
1218318224bbSNeel Natu 	int error;
1219318224bbSNeel Natu 
1220f80330a8SNeel Natu 	if ((error = vcpu_set_state(vm, vcpuid, newstate, false)) != 0)
1221318224bbSNeel Natu 		panic("Error %d setting state to %d\n", error, newstate);
1222318224bbSNeel Natu }
1223318224bbSNeel Natu 
1224318224bbSNeel Natu static void
1225248e6799SNeel Natu vcpu_require_state_locked(struct vm *vm, int vcpuid, enum vcpu_state newstate)
1226318224bbSNeel Natu {
1227318224bbSNeel Natu 	int error;
1228318224bbSNeel Natu 
1229248e6799SNeel Natu 	if ((error = vcpu_set_state_locked(vm, vcpuid, newstate, false)) != 0)
1230318224bbSNeel Natu 		panic("Error %d setting state to %d", error, newstate);
1231318224bbSNeel Natu }
1232318224bbSNeel Natu 
12335b8a8cd1SNeel Natu static void
12345b8a8cd1SNeel Natu vm_set_rendezvous_func(struct vm *vm, vm_rendezvous_func_t func)
12355b8a8cd1SNeel Natu {
12365b8a8cd1SNeel Natu 
12375b8a8cd1SNeel Natu 	KASSERT(mtx_owned(&vm->rendezvous_mtx), ("rendezvous_mtx not locked"));
12385b8a8cd1SNeel Natu 
12395b8a8cd1SNeel Natu 	/*
12405b8a8cd1SNeel Natu 	 * Update 'rendezvous_func' and execute a write memory barrier to
12415b8a8cd1SNeel Natu 	 * ensure that it is visible across all host cpus. This is not needed
12425b8a8cd1SNeel Natu 	 * for correctness but it does ensure that all the vcpus will notice
12435b8a8cd1SNeel Natu 	 * that the rendezvous is requested immediately.
12445b8a8cd1SNeel Natu 	 */
12455b8a8cd1SNeel Natu 	vm->rendezvous_func = func;
12465b8a8cd1SNeel Natu 	wmb();
12475b8a8cd1SNeel Natu }
12485b8a8cd1SNeel Natu 
12495b8a8cd1SNeel Natu #define	RENDEZVOUS_CTR0(vm, vcpuid, fmt)				\
12505b8a8cd1SNeel Natu 	do {								\
12515b8a8cd1SNeel Natu 		if (vcpuid >= 0)					\
12525b8a8cd1SNeel Natu 			VCPU_CTR0(vm, vcpuid, fmt);			\
12535b8a8cd1SNeel Natu 		else							\
12545b8a8cd1SNeel Natu 			VM_CTR0(vm, fmt);				\
12555b8a8cd1SNeel Natu 	} while (0)
12565b8a8cd1SNeel Natu 
12575b8a8cd1SNeel Natu static void
12585b8a8cd1SNeel Natu vm_handle_rendezvous(struct vm *vm, int vcpuid)
12595b8a8cd1SNeel Natu {
12605b8a8cd1SNeel Natu 
12615b8a8cd1SNeel Natu 	KASSERT(vcpuid == -1 || (vcpuid >= 0 && vcpuid < VM_MAXCPU),
12625b8a8cd1SNeel Natu 	    ("vm_handle_rendezvous: invalid vcpuid %d", vcpuid));
12635b8a8cd1SNeel Natu 
12645b8a8cd1SNeel Natu 	mtx_lock(&vm->rendezvous_mtx);
12655b8a8cd1SNeel Natu 	while (vm->rendezvous_func != NULL) {
126622d822c6SNeel Natu 		/* 'rendezvous_req_cpus' must be a subset of 'active_cpus' */
126722d822c6SNeel Natu 		CPU_AND(&vm->rendezvous_req_cpus, &vm->active_cpus);
126822d822c6SNeel Natu 
12695b8a8cd1SNeel Natu 		if (vcpuid != -1 &&
127022d822c6SNeel Natu 		    CPU_ISSET(vcpuid, &vm->rendezvous_req_cpus) &&
127122d822c6SNeel Natu 		    !CPU_ISSET(vcpuid, &vm->rendezvous_done_cpus)) {
12725b8a8cd1SNeel Natu 			VCPU_CTR0(vm, vcpuid, "Calling rendezvous func");
12735b8a8cd1SNeel Natu 			(*vm->rendezvous_func)(vm, vcpuid, vm->rendezvous_arg);
12745b8a8cd1SNeel Natu 			CPU_SET(vcpuid, &vm->rendezvous_done_cpus);
12755b8a8cd1SNeel Natu 		}
12765b8a8cd1SNeel Natu 		if (CPU_CMP(&vm->rendezvous_req_cpus,
12775b8a8cd1SNeel Natu 		    &vm->rendezvous_done_cpus) == 0) {
12785b8a8cd1SNeel Natu 			VCPU_CTR0(vm, vcpuid, "Rendezvous completed");
12795b8a8cd1SNeel Natu 			vm_set_rendezvous_func(vm, NULL);
12805b8a8cd1SNeel Natu 			wakeup(&vm->rendezvous_func);
12815b8a8cd1SNeel Natu 			break;
12825b8a8cd1SNeel Natu 		}
12835b8a8cd1SNeel Natu 		RENDEZVOUS_CTR0(vm, vcpuid, "Wait for rendezvous completion");
12845b8a8cd1SNeel Natu 		mtx_sleep(&vm->rendezvous_func, &vm->rendezvous_mtx, 0,
12855b8a8cd1SNeel Natu 		    "vmrndv", 0);
12865b8a8cd1SNeel Natu 	}
12875b8a8cd1SNeel Natu 	mtx_unlock(&vm->rendezvous_mtx);
12885b8a8cd1SNeel Natu }
12895b8a8cd1SNeel Natu 
1290318224bbSNeel Natu /*
1291318224bbSNeel Natu  * Emulate a guest 'hlt' by sleeping until the vcpu is ready to run.
1292318224bbSNeel Natu  */
1293318224bbSNeel Natu static int
1294becd9849SNeel Natu vm_handle_hlt(struct vm *vm, int vcpuid, bool intr_disabled, bool *retu)
1295318224bbSNeel Natu {
1296318224bbSNeel Natu 	struct vcpu *vcpu;
1297c6a0cc2eSNeel Natu 	const char *wmesg;
12982ce12423SNeel Natu 	int t, vcpu_halted, vm_halted;
1299e50ce2aaSNeel Natu 
1300e50ce2aaSNeel Natu 	KASSERT(!CPU_ISSET(vcpuid, &vm->halted_cpus), ("vcpu already halted"));
1301318224bbSNeel Natu 
1302318224bbSNeel Natu 	vcpu = &vm->vcpu[vcpuid];
1303e50ce2aaSNeel Natu 	vcpu_halted = 0;
1304e50ce2aaSNeel Natu 	vm_halted = 0;
1305318224bbSNeel Natu 
1306f76fc5d4SNeel Natu 	vcpu_lock(vcpu);
1307c6a0cc2eSNeel Natu 	while (1) {
1308f76fc5d4SNeel Natu 		/*
1309f76fc5d4SNeel Natu 		 * Do a final check for pending NMI or interrupts before
1310c6a0cc2eSNeel Natu 		 * really putting this thread to sleep. Also check for
1311c6a0cc2eSNeel Natu 		 * software events that would cause this vcpu to wakeup.
1312f76fc5d4SNeel Natu 		 *
1313c6a0cc2eSNeel Natu 		 * These interrupts/events could have happened after the
1314c6a0cc2eSNeel Natu 		 * vcpu returned from VMRUN() and before it acquired the
1315c6a0cc2eSNeel Natu 		 * vcpu lock above.
1316f76fc5d4SNeel Natu 		 */
1317248e6799SNeel Natu 		if (vm->rendezvous_func != NULL || vm->suspend || vcpu->reqidle)
1318c6a0cc2eSNeel Natu 			break;
1319c6a0cc2eSNeel Natu 		if (vm_nmi_pending(vm, vcpuid))
1320c6a0cc2eSNeel Natu 			break;
1321c6a0cc2eSNeel Natu 		if (!intr_disabled) {
1322c6a0cc2eSNeel Natu 			if (vm_extint_pending(vm, vcpuid) ||
1323c6a0cc2eSNeel Natu 			    vlapic_pending_intr(vcpu->vlapic, NULL)) {
1324c6a0cc2eSNeel Natu 				break;
1325c6a0cc2eSNeel Natu 			}
1326c6a0cc2eSNeel Natu 		}
1327c6a0cc2eSNeel Natu 
1328f008d157SNeel Natu 		/* Don't go to sleep if the vcpu thread needs to yield */
1329f008d157SNeel Natu 		if (vcpu_should_yield(vm, vcpuid))
1330f008d157SNeel Natu 			break;
1331f008d157SNeel Natu 
1332fc276d92SJohn Baldwin 		if (vcpu_debugged(vm, vcpuid))
1333fc276d92SJohn Baldwin 			break;
1334fc276d92SJohn Baldwin 
1335e50ce2aaSNeel Natu 		/*
1336e50ce2aaSNeel Natu 		 * Some Linux guests implement "halt" by having all vcpus
1337e50ce2aaSNeel Natu 		 * execute HLT with interrupts disabled. 'halted_cpus' keeps
1338e50ce2aaSNeel Natu 		 * track of the vcpus that have entered this state. When all
1339e50ce2aaSNeel Natu 		 * vcpus enter the halted state the virtual machine is halted.
1340e50ce2aaSNeel Natu 		 */
1341e50ce2aaSNeel Natu 		if (intr_disabled) {
1342c6a0cc2eSNeel Natu 			wmesg = "vmhalt";
1343e50ce2aaSNeel Natu 			VCPU_CTR0(vm, vcpuid, "Halted");
1344055fc2cbSNeel Natu 			if (!vcpu_halted && halt_detection_enabled) {
1345e50ce2aaSNeel Natu 				vcpu_halted = 1;
1346e50ce2aaSNeel Natu 				CPU_SET_ATOMIC(vcpuid, &vm->halted_cpus);
1347e50ce2aaSNeel Natu 			}
1348e50ce2aaSNeel Natu 			if (CPU_CMP(&vm->halted_cpus, &vm->active_cpus) == 0) {
1349e50ce2aaSNeel Natu 				vm_halted = 1;
1350e50ce2aaSNeel Natu 				break;
1351e50ce2aaSNeel Natu 			}
1352e50ce2aaSNeel Natu 		} else {
1353e50ce2aaSNeel Natu 			wmesg = "vmidle";
1354e50ce2aaSNeel Natu 		}
1355c6a0cc2eSNeel Natu 
1356f76fc5d4SNeel Natu 		t = ticks;
1357248e6799SNeel Natu 		vcpu_require_state_locked(vm, vcpuid, VCPU_SLEEPING);
1358f008d157SNeel Natu 		/*
1359f008d157SNeel Natu 		 * XXX msleep_spin() cannot be interrupted by signals so
1360f008d157SNeel Natu 		 * wake up periodically to check pending signals.
1361f008d157SNeel Natu 		 */
1362f008d157SNeel Natu 		msleep_spin(vcpu, &vcpu->mtx, wmesg, hz);
1363248e6799SNeel Natu 		vcpu_require_state_locked(vm, vcpuid, VCPU_FROZEN);
1364f76fc5d4SNeel Natu 		vmm_stat_incr(vm, vcpuid, VCPU_IDLE_TICKS, ticks - t);
1365f76fc5d4SNeel Natu 	}
1366e50ce2aaSNeel Natu 
1367e50ce2aaSNeel Natu 	if (vcpu_halted)
1368e50ce2aaSNeel Natu 		CPU_CLR_ATOMIC(vcpuid, &vm->halted_cpus);
1369e50ce2aaSNeel Natu 
1370f76fc5d4SNeel Natu 	vcpu_unlock(vcpu);
1371f76fc5d4SNeel Natu 
1372e50ce2aaSNeel Natu 	if (vm_halted)
1373e50ce2aaSNeel Natu 		vm_suspend(vm, VM_SUSPEND_HALT);
1374e50ce2aaSNeel Natu 
1375318224bbSNeel Natu 	return (0);
1376318224bbSNeel Natu }
1377318224bbSNeel Natu 
1378318224bbSNeel Natu static int
1379becd9849SNeel Natu vm_handle_paging(struct vm *vm, int vcpuid, bool *retu)
1380318224bbSNeel Natu {
1381318224bbSNeel Natu 	int rv, ftype;
1382318224bbSNeel Natu 	struct vm_map *map;
1383318224bbSNeel Natu 	struct vcpu *vcpu;
1384318224bbSNeel Natu 	struct vm_exit *vme;
1385318224bbSNeel Natu 
1386318224bbSNeel Natu 	vcpu = &vm->vcpu[vcpuid];
1387318224bbSNeel Natu 	vme = &vcpu->exitinfo;
1388318224bbSNeel Natu 
1389d087a399SNeel Natu 	KASSERT(vme->inst_length == 0, ("%s: invalid inst_length %d",
1390d087a399SNeel Natu 	    __func__, vme->inst_length));
1391d087a399SNeel Natu 
1392318224bbSNeel Natu 	ftype = vme->u.paging.fault_type;
1393318224bbSNeel Natu 	KASSERT(ftype == VM_PROT_READ ||
1394318224bbSNeel Natu 	    ftype == VM_PROT_WRITE || ftype == VM_PROT_EXECUTE,
1395318224bbSNeel Natu 	    ("vm_handle_paging: invalid fault_type %d", ftype));
1396318224bbSNeel Natu 
1397318224bbSNeel Natu 	if (ftype == VM_PROT_READ || ftype == VM_PROT_WRITE) {
1398318224bbSNeel Natu 		rv = pmap_emulate_accessed_dirty(vmspace_pmap(vm->vmspace),
1399318224bbSNeel Natu 		    vme->u.paging.gpa, ftype);
14009d8d8e3eSNeel Natu 		if (rv == 0) {
14019d8d8e3eSNeel Natu 			VCPU_CTR2(vm, vcpuid, "%s bit emulation for gpa %#lx",
14029d8d8e3eSNeel Natu 			    ftype == VM_PROT_READ ? "accessed" : "dirty",
14039d8d8e3eSNeel Natu 			    vme->u.paging.gpa);
1404318224bbSNeel Natu 			goto done;
1405318224bbSNeel Natu 		}
14069d8d8e3eSNeel Natu 	}
1407318224bbSNeel Natu 
1408318224bbSNeel Natu 	map = &vm->vmspace->vm_map;
1409318224bbSNeel Natu 	rv = vm_fault(map, vme->u.paging.gpa, ftype, VM_FAULT_NORMAL);
1410318224bbSNeel Natu 
1411513c8d33SNeel Natu 	VCPU_CTR3(vm, vcpuid, "vm_handle_paging rv = %d, gpa = %#lx, "
1412513c8d33SNeel Natu 	    "ftype = %d", rv, vme->u.paging.gpa, ftype);
1413318224bbSNeel Natu 
1414318224bbSNeel Natu 	if (rv != KERN_SUCCESS)
1415318224bbSNeel Natu 		return (EFAULT);
1416318224bbSNeel Natu done:
1417318224bbSNeel Natu 	return (0);
1418318224bbSNeel Natu }
1419318224bbSNeel Natu 
1420318224bbSNeel Natu static int
1421becd9849SNeel Natu vm_handle_inst_emul(struct vm *vm, int vcpuid, bool *retu)
1422318224bbSNeel Natu {
1423318224bbSNeel Natu 	struct vie *vie;
1424318224bbSNeel Natu 	struct vcpu *vcpu;
1425318224bbSNeel Natu 	struct vm_exit *vme;
1426e4f605eeSTycho Nightingale 	uint64_t gla, gpa, cs_base;
1427e813a873SNeel Natu 	struct vm_guest_paging *paging;
1428565bbb86SNeel Natu 	mem_region_read_t mread;
1429565bbb86SNeel Natu 	mem_region_write_t mwrite;
1430f7a9f178SNeel Natu 	enum vm_cpu_mode cpu_mode;
14311c73ea3eSNeel Natu 	int cs_d, error, fault;
1432318224bbSNeel Natu 
1433318224bbSNeel Natu 	vcpu = &vm->vcpu[vcpuid];
1434318224bbSNeel Natu 	vme = &vcpu->exitinfo;
1435318224bbSNeel Natu 
14361c73ea3eSNeel Natu 	KASSERT(vme->inst_length == 0, ("%s: invalid inst_length %d",
14371c73ea3eSNeel Natu 	    __func__, vme->inst_length));
14381c73ea3eSNeel Natu 
1439318224bbSNeel Natu 	gla = vme->u.inst_emul.gla;
1440318224bbSNeel Natu 	gpa = vme->u.inst_emul.gpa;
1441e4f605eeSTycho Nightingale 	cs_base = vme->u.inst_emul.cs_base;
1442f7a9f178SNeel Natu 	cs_d = vme->u.inst_emul.cs_d;
1443318224bbSNeel Natu 	vie = &vme->u.inst_emul.vie;
1444e813a873SNeel Natu 	paging = &vme->u.inst_emul.paging;
1445f7a9f178SNeel Natu 	cpu_mode = paging->cpu_mode;
1446318224bbSNeel Natu 
14479d8d8e3eSNeel Natu 	VCPU_CTR1(vm, vcpuid, "inst_emul fault accessing gpa %#lx", gpa);
14489d8d8e3eSNeel Natu 
1449318224bbSNeel Natu 	/* Fetch, decode and emulate the faulting instruction */
1450c2a875f9SNeel Natu 	if (vie->num_valid == 0) {
1451e4f605eeSTycho Nightingale 		error = vmm_fetch_instruction(vm, vcpuid, paging, vme->rip +
14521c73ea3eSNeel Natu 		    cs_base, VIE_INST_SIZE, vie, &fault);
1453c2a875f9SNeel Natu 	} else {
1454c2a875f9SNeel Natu 		/*
1455c2a875f9SNeel Natu 		 * The instruction bytes have already been copied into 'vie'
1456c2a875f9SNeel Natu 		 */
14579c4d5478SNeel Natu 		error = fault = 0;
1458c2a875f9SNeel Natu 	}
14599c4d5478SNeel Natu 	if (error || fault)
14609c4d5478SNeel Natu 		return (error);
1461318224bbSNeel Natu 
1462c07a0648SNeel Natu 	if (vmm_decode_instruction(vm, vcpuid, gla, cpu_mode, cs_d, vie) != 0) {
1463c07a0648SNeel Natu 		VCPU_CTR1(vm, vcpuid, "Error decoding instruction at %#lx",
1464c07a0648SNeel Natu 		    vme->rip + cs_base);
1465c07a0648SNeel Natu 		*retu = true;	    /* dump instruction bytes in userspace */
1466c07a0648SNeel Natu 		return (0);
1467c07a0648SNeel Natu 	}
1468318224bbSNeel Natu 
1469a0b78f09SPeter Grehan 	/*
14701c73ea3eSNeel Natu 	 * Update 'nextrip' based on the length of the emulated instruction.
1471a0b78f09SPeter Grehan 	 */
1472a0b78f09SPeter Grehan 	vme->inst_length = vie->num_processed;
1473d087a399SNeel Natu 	vcpu->nextrip += vie->num_processed;
14741c73ea3eSNeel Natu 	VCPU_CTR1(vm, vcpuid, "nextrip updated to %#lx after instruction "
14751c73ea3eSNeel Natu 	    "decoding", vcpu->nextrip);
1476a0b78f09SPeter Grehan 
147708e3ff32SNeel Natu 	/* return to userland unless this is an in-kernel emulated device */
1478565bbb86SNeel Natu 	if (gpa >= DEFAULT_APIC_BASE && gpa < DEFAULT_APIC_BASE + PAGE_SIZE) {
1479565bbb86SNeel Natu 		mread = lapic_mmio_read;
1480565bbb86SNeel Natu 		mwrite = lapic_mmio_write;
1481565bbb86SNeel Natu 	} else if (gpa >= VIOAPIC_BASE && gpa < VIOAPIC_BASE + VIOAPIC_SIZE) {
1482565bbb86SNeel Natu 		mread = vioapic_mmio_read;
1483565bbb86SNeel Natu 		mwrite = vioapic_mmio_write;
148408e3ff32SNeel Natu 	} else if (gpa >= VHPET_BASE && gpa < VHPET_BASE + VHPET_SIZE) {
148508e3ff32SNeel Natu 		mread = vhpet_mmio_read;
148608e3ff32SNeel Natu 		mwrite = vhpet_mmio_write;
1487565bbb86SNeel Natu 	} else {
1488becd9849SNeel Natu 		*retu = true;
1489318224bbSNeel Natu 		return (0);
1490318224bbSNeel Natu 	}
1491318224bbSNeel Natu 
1492d665d229SNeel Natu 	error = vmm_emulate_instruction(vm, vcpuid, gpa, vie, paging,
1493d665d229SNeel Natu 	    mread, mwrite, retu);
1494318224bbSNeel Natu 
1495318224bbSNeel Natu 	return (error);
1496318224bbSNeel Natu }
1497318224bbSNeel Natu 
1498b15a09c0SNeel Natu static int
1499b15a09c0SNeel Natu vm_handle_suspend(struct vm *vm, int vcpuid, bool *retu)
1500b15a09c0SNeel Natu {
1501b15a09c0SNeel Natu 	int i, done;
1502b15a09c0SNeel Natu 	struct vcpu *vcpu;
1503b15a09c0SNeel Natu 
1504b15a09c0SNeel Natu 	done = 0;
1505b15a09c0SNeel Natu 	vcpu = &vm->vcpu[vcpuid];
1506b15a09c0SNeel Natu 
1507b15a09c0SNeel Natu 	CPU_SET_ATOMIC(vcpuid, &vm->suspended_cpus);
1508b15a09c0SNeel Natu 
1509b15a09c0SNeel Natu 	/*
1510b15a09c0SNeel Natu 	 * Wait until all 'active_cpus' have suspended themselves.
1511b15a09c0SNeel Natu 	 *
1512b15a09c0SNeel Natu 	 * Since a VM may be suspended at any time including when one or
1513b15a09c0SNeel Natu 	 * more vcpus are doing a rendezvous we need to call the rendezvous
1514b15a09c0SNeel Natu 	 * handler while we are waiting to prevent a deadlock.
1515b15a09c0SNeel Natu 	 */
1516b15a09c0SNeel Natu 	vcpu_lock(vcpu);
1517b15a09c0SNeel Natu 	while (1) {
1518b15a09c0SNeel Natu 		if (CPU_CMP(&vm->suspended_cpus, &vm->active_cpus) == 0) {
1519b15a09c0SNeel Natu 			VCPU_CTR0(vm, vcpuid, "All vcpus suspended");
1520b15a09c0SNeel Natu 			break;
1521b15a09c0SNeel Natu 		}
1522b15a09c0SNeel Natu 
1523b15a09c0SNeel Natu 		if (vm->rendezvous_func == NULL) {
1524b15a09c0SNeel Natu 			VCPU_CTR0(vm, vcpuid, "Sleeping during suspend");
1525248e6799SNeel Natu 			vcpu_require_state_locked(vm, vcpuid, VCPU_SLEEPING);
1526b15a09c0SNeel Natu 			msleep_spin(vcpu, &vcpu->mtx, "vmsusp", hz);
1527248e6799SNeel Natu 			vcpu_require_state_locked(vm, vcpuid, VCPU_FROZEN);
1528b15a09c0SNeel Natu 		} else {
1529b15a09c0SNeel Natu 			VCPU_CTR0(vm, vcpuid, "Rendezvous during suspend");
1530b15a09c0SNeel Natu 			vcpu_unlock(vcpu);
1531b15a09c0SNeel Natu 			vm_handle_rendezvous(vm, vcpuid);
1532b15a09c0SNeel Natu 			vcpu_lock(vcpu);
1533b15a09c0SNeel Natu 		}
1534b15a09c0SNeel Natu 	}
1535b15a09c0SNeel Natu 	vcpu_unlock(vcpu);
1536b15a09c0SNeel Natu 
1537b15a09c0SNeel Natu 	/*
1538b15a09c0SNeel Natu 	 * Wakeup the other sleeping vcpus and return to userspace.
1539b15a09c0SNeel Natu 	 */
1540b15a09c0SNeel Natu 	for (i = 0; i < VM_MAXCPU; i++) {
1541b15a09c0SNeel Natu 		if (CPU_ISSET(i, &vm->suspended_cpus)) {
1542b15a09c0SNeel Natu 			vcpu_notify_event(vm, i, false);
1543b15a09c0SNeel Natu 		}
1544b15a09c0SNeel Natu 	}
1545b15a09c0SNeel Natu 
1546b15a09c0SNeel Natu 	*retu = true;
1547b15a09c0SNeel Natu 	return (0);
1548b15a09c0SNeel Natu }
1549b15a09c0SNeel Natu 
1550248e6799SNeel Natu static int
1551248e6799SNeel Natu vm_handle_reqidle(struct vm *vm, int vcpuid, bool *retu)
1552248e6799SNeel Natu {
1553248e6799SNeel Natu 	struct vcpu *vcpu = &vm->vcpu[vcpuid];
1554248e6799SNeel Natu 
1555248e6799SNeel Natu 	vcpu_lock(vcpu);
1556248e6799SNeel Natu 	KASSERT(vcpu->reqidle, ("invalid vcpu reqidle %d", vcpu->reqidle));
1557248e6799SNeel Natu 	vcpu->reqidle = 0;
1558248e6799SNeel Natu 	vcpu_unlock(vcpu);
1559248e6799SNeel Natu 	*retu = true;
1560248e6799SNeel Natu 	return (0);
1561248e6799SNeel Natu }
1562248e6799SNeel Natu 
1563b15a09c0SNeel Natu int
1564f0fdcfe2SNeel Natu vm_suspend(struct vm *vm, enum vm_suspend_how how)
1565b15a09c0SNeel Natu {
1566f0fdcfe2SNeel Natu 	int i;
1567b15a09c0SNeel Natu 
1568f0fdcfe2SNeel Natu 	if (how <= VM_SUSPEND_NONE || how >= VM_SUSPEND_LAST)
1569f0fdcfe2SNeel Natu 		return (EINVAL);
1570f0fdcfe2SNeel Natu 
1571f0fdcfe2SNeel Natu 	if (atomic_cmpset_int(&vm->suspend, 0, how) == 0) {
1572f0fdcfe2SNeel Natu 		VM_CTR2(vm, "virtual machine already suspended %d/%d",
1573f0fdcfe2SNeel Natu 		    vm->suspend, how);
1574b15a09c0SNeel Natu 		return (EALREADY);
1575b15a09c0SNeel Natu 	}
1576f0fdcfe2SNeel Natu 
1577f0fdcfe2SNeel Natu 	VM_CTR1(vm, "virtual machine successfully suspended %d", how);
1578f0fdcfe2SNeel Natu 
1579f0fdcfe2SNeel Natu 	/*
1580f0fdcfe2SNeel Natu 	 * Notify all active vcpus that they are now suspended.
1581f0fdcfe2SNeel Natu 	 */
1582f0fdcfe2SNeel Natu 	for (i = 0; i < VM_MAXCPU; i++) {
1583f0fdcfe2SNeel Natu 		if (CPU_ISSET(i, &vm->active_cpus))
1584f0fdcfe2SNeel Natu 			vcpu_notify_event(vm, i, false);
1585f0fdcfe2SNeel Natu 	}
1586f0fdcfe2SNeel Natu 
1587f0fdcfe2SNeel Natu 	return (0);
1588f0fdcfe2SNeel Natu }
1589f0fdcfe2SNeel Natu 
1590f0fdcfe2SNeel Natu void
1591f0fdcfe2SNeel Natu vm_exit_suspended(struct vm *vm, int vcpuid, uint64_t rip)
1592f0fdcfe2SNeel Natu {
1593f0fdcfe2SNeel Natu 	struct vm_exit *vmexit;
1594f0fdcfe2SNeel Natu 
1595f0fdcfe2SNeel Natu 	KASSERT(vm->suspend > VM_SUSPEND_NONE && vm->suspend < VM_SUSPEND_LAST,
1596f0fdcfe2SNeel Natu 	    ("vm_exit_suspended: invalid suspend type %d", vm->suspend));
1597f0fdcfe2SNeel Natu 
1598f0fdcfe2SNeel Natu 	vmexit = vm_exitinfo(vm, vcpuid);
1599f0fdcfe2SNeel Natu 	vmexit->rip = rip;
1600f0fdcfe2SNeel Natu 	vmexit->inst_length = 0;
1601f0fdcfe2SNeel Natu 	vmexit->exitcode = VM_EXITCODE_SUSPENDED;
1602f0fdcfe2SNeel Natu 	vmexit->u.suspended.how = vm->suspend;
1603b15a09c0SNeel Natu }
1604b15a09c0SNeel Natu 
160540487465SNeel Natu void
1606fc276d92SJohn Baldwin vm_exit_debug(struct vm *vm, int vcpuid, uint64_t rip)
1607fc276d92SJohn Baldwin {
1608fc276d92SJohn Baldwin 	struct vm_exit *vmexit;
1609fc276d92SJohn Baldwin 
1610fc276d92SJohn Baldwin 	vmexit = vm_exitinfo(vm, vcpuid);
1611fc276d92SJohn Baldwin 	vmexit->rip = rip;
1612fc276d92SJohn Baldwin 	vmexit->inst_length = 0;
1613fc276d92SJohn Baldwin 	vmexit->exitcode = VM_EXITCODE_DEBUG;
1614fc276d92SJohn Baldwin }
1615fc276d92SJohn Baldwin 
1616fc276d92SJohn Baldwin void
161740487465SNeel Natu vm_exit_rendezvous(struct vm *vm, int vcpuid, uint64_t rip)
161840487465SNeel Natu {
161940487465SNeel Natu 	struct vm_exit *vmexit;
162040487465SNeel Natu 
162140487465SNeel Natu 	KASSERT(vm->rendezvous_func != NULL, ("rendezvous not in progress"));
162240487465SNeel Natu 
162340487465SNeel Natu 	vmexit = vm_exitinfo(vm, vcpuid);
162440487465SNeel Natu 	vmexit->rip = rip;
162540487465SNeel Natu 	vmexit->inst_length = 0;
162640487465SNeel Natu 	vmexit->exitcode = VM_EXITCODE_RENDEZVOUS;
162740487465SNeel Natu 	vmm_stat_incr(vm, vcpuid, VMEXIT_RENDEZVOUS, 1);
162840487465SNeel Natu }
162940487465SNeel Natu 
163040487465SNeel Natu void
1631248e6799SNeel Natu vm_exit_reqidle(struct vm *vm, int vcpuid, uint64_t rip)
1632248e6799SNeel Natu {
1633248e6799SNeel Natu 	struct vm_exit *vmexit;
1634248e6799SNeel Natu 
1635248e6799SNeel Natu 	vmexit = vm_exitinfo(vm, vcpuid);
1636248e6799SNeel Natu 	vmexit->rip = rip;
1637248e6799SNeel Natu 	vmexit->inst_length = 0;
1638248e6799SNeel Natu 	vmexit->exitcode = VM_EXITCODE_REQIDLE;
1639248e6799SNeel Natu 	vmm_stat_incr(vm, vcpuid, VMEXIT_REQIDLE, 1);
1640248e6799SNeel Natu }
1641248e6799SNeel Natu 
1642248e6799SNeel Natu void
164340487465SNeel Natu vm_exit_astpending(struct vm *vm, int vcpuid, uint64_t rip)
164440487465SNeel Natu {
164540487465SNeel Natu 	struct vm_exit *vmexit;
164640487465SNeel Natu 
164740487465SNeel Natu 	vmexit = vm_exitinfo(vm, vcpuid);
164840487465SNeel Natu 	vmexit->rip = rip;
164940487465SNeel Natu 	vmexit->inst_length = 0;
165040487465SNeel Natu 	vmexit->exitcode = VM_EXITCODE_BOGUS;
165140487465SNeel Natu 	vmm_stat_incr(vm, vcpuid, VMEXIT_ASTPENDING, 1);
165240487465SNeel Natu }
165340487465SNeel Natu 
1654318224bbSNeel Natu int
1655318224bbSNeel Natu vm_run(struct vm *vm, struct vm_run *vmrun)
1656318224bbSNeel Natu {
1657248e6799SNeel Natu 	struct vm_eventinfo evinfo;
1658318224bbSNeel Natu 	int error, vcpuid;
1659318224bbSNeel Natu 	struct vcpu *vcpu;
1660318224bbSNeel Natu 	struct pcb *pcb;
1661d087a399SNeel Natu 	uint64_t tscval;
1662318224bbSNeel Natu 	struct vm_exit *vme;
1663becd9849SNeel Natu 	bool retu, intr_disabled;
1664318224bbSNeel Natu 	pmap_t pmap;
1665318224bbSNeel Natu 
1666318224bbSNeel Natu 	vcpuid = vmrun->cpuid;
1667318224bbSNeel Natu 
1668318224bbSNeel Natu 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
1669318224bbSNeel Natu 		return (EINVAL);
1670318224bbSNeel Natu 
167195ebc360SNeel Natu 	if (!CPU_ISSET(vcpuid, &vm->active_cpus))
167295ebc360SNeel Natu 		return (EINVAL);
167395ebc360SNeel Natu 
167495ebc360SNeel Natu 	if (CPU_ISSET(vcpuid, &vm->suspended_cpus))
167595ebc360SNeel Natu 		return (EINVAL);
167695ebc360SNeel Natu 
1677318224bbSNeel Natu 	pmap = vmspace_pmap(vm->vmspace);
1678318224bbSNeel Natu 	vcpu = &vm->vcpu[vcpuid];
1679318224bbSNeel Natu 	vme = &vcpu->exitinfo;
1680248e6799SNeel Natu 	evinfo.rptr = &vm->rendezvous_func;
1681248e6799SNeel Natu 	evinfo.sptr = &vm->suspend;
1682248e6799SNeel Natu 	evinfo.iptr = &vcpu->reqidle;
1683318224bbSNeel Natu restart:
1684318224bbSNeel Natu 	critical_enter();
1685318224bbSNeel Natu 
1686318224bbSNeel Natu 	KASSERT(!CPU_ISSET(curcpu, &pmap->pm_active),
1687318224bbSNeel Natu 	    ("vm_run: absurd pm_active"));
1688318224bbSNeel Natu 
1689318224bbSNeel Natu 	tscval = rdtsc();
1690318224bbSNeel Natu 
1691318224bbSNeel Natu 	pcb = PCPU_GET(curpcb);
1692318224bbSNeel Natu 	set_pcb_flags(pcb, PCB_FULL_IRET);
1693318224bbSNeel Natu 
1694318224bbSNeel Natu 	restore_guest_fpustate(vcpu);
1695318224bbSNeel Natu 
1696318224bbSNeel Natu 	vcpu_require_state(vm, vcpuid, VCPU_RUNNING);
1697248e6799SNeel Natu 	error = VMRUN(vm->cookie, vcpuid, vcpu->nextrip, pmap, &evinfo);
1698318224bbSNeel Natu 	vcpu_require_state(vm, vcpuid, VCPU_FROZEN);
1699318224bbSNeel Natu 
1700318224bbSNeel Natu 	save_guest_fpustate(vcpu);
1701318224bbSNeel Natu 
1702318224bbSNeel Natu 	vmm_stat_incr(vm, vcpuid, VCPU_TOTAL_RUNTIME, rdtsc() - tscval);
1703318224bbSNeel Natu 
1704318224bbSNeel Natu 	critical_exit();
1705318224bbSNeel Natu 
1706318224bbSNeel Natu 	if (error == 0) {
1707becd9849SNeel Natu 		retu = false;
1708d087a399SNeel Natu 		vcpu->nextrip = vme->rip + vme->inst_length;
1709318224bbSNeel Natu 		switch (vme->exitcode) {
1710248e6799SNeel Natu 		case VM_EXITCODE_REQIDLE:
1711248e6799SNeel Natu 			error = vm_handle_reqidle(vm, vcpuid, &retu);
1712248e6799SNeel Natu 			break;
1713b15a09c0SNeel Natu 		case VM_EXITCODE_SUSPENDED:
1714b15a09c0SNeel Natu 			error = vm_handle_suspend(vm, vcpuid, &retu);
1715b15a09c0SNeel Natu 			break;
171630b94db8SNeel Natu 		case VM_EXITCODE_IOAPIC_EOI:
171730b94db8SNeel Natu 			vioapic_process_eoi(vm, vcpuid,
171830b94db8SNeel Natu 			    vme->u.ioapic_eoi.vector);
171930b94db8SNeel Natu 			break;
17205b8a8cd1SNeel Natu 		case VM_EXITCODE_RENDEZVOUS:
17215b8a8cd1SNeel Natu 			vm_handle_rendezvous(vm, vcpuid);
17225b8a8cd1SNeel Natu 			error = 0;
17235b8a8cd1SNeel Natu 			break;
1724318224bbSNeel Natu 		case VM_EXITCODE_HLT:
1725becd9849SNeel Natu 			intr_disabled = ((vme->u.hlt.rflags & PSL_I) == 0);
17261c052192SNeel Natu 			error = vm_handle_hlt(vm, vcpuid, intr_disabled, &retu);
1727318224bbSNeel Natu 			break;
1728318224bbSNeel Natu 		case VM_EXITCODE_PAGING:
1729318224bbSNeel Natu 			error = vm_handle_paging(vm, vcpuid, &retu);
1730318224bbSNeel Natu 			break;
1731318224bbSNeel Natu 		case VM_EXITCODE_INST_EMUL:
1732318224bbSNeel Natu 			error = vm_handle_inst_emul(vm, vcpuid, &retu);
1733318224bbSNeel Natu 			break;
1734d17b5104SNeel Natu 		case VM_EXITCODE_INOUT:
1735d17b5104SNeel Natu 		case VM_EXITCODE_INOUT_STR:
1736d17b5104SNeel Natu 			error = vm_handle_inout(vm, vcpuid, vme, &retu);
1737d17b5104SNeel Natu 			break;
173865145c7fSNeel Natu 		case VM_EXITCODE_MONITOR:
173965145c7fSNeel Natu 		case VM_EXITCODE_MWAIT:
174065145c7fSNeel Natu 			vm_inject_ud(vm, vcpuid);
174165145c7fSNeel Natu 			break;
1742318224bbSNeel Natu 		default:
1743becd9849SNeel Natu 			retu = true;	/* handled in userland */
1744318224bbSNeel Natu 			break;
1745318224bbSNeel Natu 		}
1746318224bbSNeel Natu 	}
1747318224bbSNeel Natu 
1748d087a399SNeel Natu 	if (error == 0 && retu == false)
1749f76fc5d4SNeel Natu 		goto restart;
1750f76fc5d4SNeel Natu 
1751248e6799SNeel Natu 	VCPU_CTR2(vm, vcpuid, "retu %d/%d", error, vme->exitcode);
1752248e6799SNeel Natu 
1753318224bbSNeel Natu 	/* copy the exit information */
1754318224bbSNeel Natu 	bcopy(vme, &vmrun->vm_exit, sizeof(struct vm_exit));
1755366f6083SPeter Grehan 	return (error);
1756366f6083SPeter Grehan }
1757366f6083SPeter Grehan 
1758366f6083SPeter Grehan int
1759c9c75df4SNeel Natu vm_restart_instruction(void *arg, int vcpuid)
1760c9c75df4SNeel Natu {
1761d087a399SNeel Natu 	struct vm *vm;
1762c9c75df4SNeel Natu 	struct vcpu *vcpu;
1763d087a399SNeel Natu 	enum vcpu_state state;
1764d087a399SNeel Natu 	uint64_t rip;
1765d087a399SNeel Natu 	int error;
1766c9c75df4SNeel Natu 
1767d087a399SNeel Natu 	vm = arg;
1768c9c75df4SNeel Natu 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
1769c9c75df4SNeel Natu 		return (EINVAL);
1770c9c75df4SNeel Natu 
1771c9c75df4SNeel Natu 	vcpu = &vm->vcpu[vcpuid];
1772d087a399SNeel Natu 	state = vcpu_get_state(vm, vcpuid, NULL);
1773d087a399SNeel Natu 	if (state == VCPU_RUNNING) {
1774d087a399SNeel Natu 		/*
1775d087a399SNeel Natu 		 * When a vcpu is "running" the next instruction is determined
1776d087a399SNeel Natu 		 * by adding 'rip' and 'inst_length' in the vcpu's 'exitinfo'.
1777d087a399SNeel Natu 		 * Thus setting 'inst_length' to zero will cause the current
1778d087a399SNeel Natu 		 * instruction to be restarted.
1779d087a399SNeel Natu 		 */
1780c9c75df4SNeel Natu 		vcpu->exitinfo.inst_length = 0;
1781d087a399SNeel Natu 		VCPU_CTR1(vm, vcpuid, "restarting instruction at %#lx by "
1782d087a399SNeel Natu 		    "setting inst_length to zero", vcpu->exitinfo.rip);
1783d087a399SNeel Natu 	} else if (state == VCPU_FROZEN) {
1784d087a399SNeel Natu 		/*
1785d087a399SNeel Natu 		 * When a vcpu is "frozen" it is outside the critical section
1786d087a399SNeel Natu 		 * around VMRUN() and 'nextrip' points to the next instruction.
1787d087a399SNeel Natu 		 * Thus instruction restart is achieved by setting 'nextrip'
1788d087a399SNeel Natu 		 * to the vcpu's %rip.
1789d087a399SNeel Natu 		 */
1790d087a399SNeel Natu 		error = vm_get_register(vm, vcpuid, VM_REG_GUEST_RIP, &rip);
1791d087a399SNeel Natu 		KASSERT(!error, ("%s: error %d getting rip", __func__, error));
1792d087a399SNeel Natu 		VCPU_CTR2(vm, vcpuid, "restarting instruction by updating "
1793d087a399SNeel Natu 		    "nextrip from %#lx to %#lx", vcpu->nextrip, rip);
1794d087a399SNeel Natu 		vcpu->nextrip = rip;
1795d087a399SNeel Natu 	} else {
1796d087a399SNeel Natu 		panic("%s: invalid state %d", __func__, state);
1797d087a399SNeel Natu 	}
1798c9c75df4SNeel Natu 	return (0);
1799c9c75df4SNeel Natu }
1800c9c75df4SNeel Natu 
1801c9c75df4SNeel Natu int
1802091d4532SNeel Natu vm_exit_intinfo(struct vm *vm, int vcpuid, uint64_t info)
1803091d4532SNeel Natu {
1804091d4532SNeel Natu 	struct vcpu *vcpu;
1805091d4532SNeel Natu 	int type, vector;
1806091d4532SNeel Natu 
1807091d4532SNeel Natu 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
1808091d4532SNeel Natu 		return (EINVAL);
1809091d4532SNeel Natu 
1810091d4532SNeel Natu 	vcpu = &vm->vcpu[vcpuid];
1811091d4532SNeel Natu 
1812091d4532SNeel Natu 	if (info & VM_INTINFO_VALID) {
1813091d4532SNeel Natu 		type = info & VM_INTINFO_TYPE;
1814091d4532SNeel Natu 		vector = info & 0xff;
1815091d4532SNeel Natu 		if (type == VM_INTINFO_NMI && vector != IDT_NMI)
1816091d4532SNeel Natu 			return (EINVAL);
1817091d4532SNeel Natu 		if (type == VM_INTINFO_HWEXCEPTION && vector >= 32)
1818091d4532SNeel Natu 			return (EINVAL);
1819091d4532SNeel Natu 		if (info & VM_INTINFO_RSVD)
1820091d4532SNeel Natu 			return (EINVAL);
1821091d4532SNeel Natu 	} else {
1822091d4532SNeel Natu 		info = 0;
1823091d4532SNeel Natu 	}
1824091d4532SNeel Natu 	VCPU_CTR2(vm, vcpuid, "%s: info1(%#lx)", __func__, info);
1825091d4532SNeel Natu 	vcpu->exitintinfo = info;
1826091d4532SNeel Natu 	return (0);
1827091d4532SNeel Natu }
1828091d4532SNeel Natu 
1829091d4532SNeel Natu enum exc_class {
1830091d4532SNeel Natu 	EXC_BENIGN,
1831091d4532SNeel Natu 	EXC_CONTRIBUTORY,
1832091d4532SNeel Natu 	EXC_PAGEFAULT
1833091d4532SNeel Natu };
1834091d4532SNeel Natu 
1835091d4532SNeel Natu #define	IDT_VE	20	/* Virtualization Exception (Intel specific) */
1836091d4532SNeel Natu 
1837091d4532SNeel Natu static enum exc_class
1838091d4532SNeel Natu exception_class(uint64_t info)
1839091d4532SNeel Natu {
1840091d4532SNeel Natu 	int type, vector;
1841091d4532SNeel Natu 
1842091d4532SNeel Natu 	KASSERT(info & VM_INTINFO_VALID, ("intinfo must be valid: %#lx", info));
1843091d4532SNeel Natu 	type = info & VM_INTINFO_TYPE;
1844091d4532SNeel Natu 	vector = info & 0xff;
1845091d4532SNeel Natu 
1846091d4532SNeel Natu 	/* Table 6-4, "Interrupt and Exception Classes", Intel SDM, Vol 3 */
1847091d4532SNeel Natu 	switch (type) {
1848091d4532SNeel Natu 	case VM_INTINFO_HWINTR:
1849091d4532SNeel Natu 	case VM_INTINFO_SWINTR:
1850091d4532SNeel Natu 	case VM_INTINFO_NMI:
1851091d4532SNeel Natu 		return (EXC_BENIGN);
1852091d4532SNeel Natu 	default:
1853091d4532SNeel Natu 		/*
1854091d4532SNeel Natu 		 * Hardware exception.
1855091d4532SNeel Natu 		 *
1856091d4532SNeel Natu 		 * SVM and VT-x use identical type values to represent NMI,
1857091d4532SNeel Natu 		 * hardware interrupt and software interrupt.
1858091d4532SNeel Natu 		 *
1859091d4532SNeel Natu 		 * SVM uses type '3' for all exceptions. VT-x uses type '3'
1860091d4532SNeel Natu 		 * for exceptions except #BP and #OF. #BP and #OF use a type
1861091d4532SNeel Natu 		 * value of '5' or '6'. Therefore we don't check for explicit
1862091d4532SNeel Natu 		 * values of 'type' to classify 'intinfo' into a hardware
1863091d4532SNeel Natu 		 * exception.
1864091d4532SNeel Natu 		 */
1865091d4532SNeel Natu 		break;
1866091d4532SNeel Natu 	}
1867091d4532SNeel Natu 
1868091d4532SNeel Natu 	switch (vector) {
1869091d4532SNeel Natu 	case IDT_PF:
1870091d4532SNeel Natu 	case IDT_VE:
1871091d4532SNeel Natu 		return (EXC_PAGEFAULT);
1872091d4532SNeel Natu 	case IDT_DE:
1873091d4532SNeel Natu 	case IDT_TS:
1874091d4532SNeel Natu 	case IDT_NP:
1875091d4532SNeel Natu 	case IDT_SS:
1876091d4532SNeel Natu 	case IDT_GP:
1877091d4532SNeel Natu 		return (EXC_CONTRIBUTORY);
1878091d4532SNeel Natu 	default:
1879091d4532SNeel Natu 		return (EXC_BENIGN);
1880091d4532SNeel Natu 	}
1881091d4532SNeel Natu }
1882091d4532SNeel Natu 
1883091d4532SNeel Natu static int
1884091d4532SNeel Natu nested_fault(struct vm *vm, int vcpuid, uint64_t info1, uint64_t info2,
1885091d4532SNeel Natu     uint64_t *retinfo)
1886091d4532SNeel Natu {
1887091d4532SNeel Natu 	enum exc_class exc1, exc2;
1888091d4532SNeel Natu 	int type1, vector1;
1889091d4532SNeel Natu 
1890091d4532SNeel Natu 	KASSERT(info1 & VM_INTINFO_VALID, ("info1 %#lx is not valid", info1));
1891091d4532SNeel Natu 	KASSERT(info2 & VM_INTINFO_VALID, ("info2 %#lx is not valid", info2));
1892091d4532SNeel Natu 
1893091d4532SNeel Natu 	/*
1894091d4532SNeel Natu 	 * If an exception occurs while attempting to call the double-fault
1895091d4532SNeel Natu 	 * handler the processor enters shutdown mode (aka triple fault).
1896091d4532SNeel Natu 	 */
1897091d4532SNeel Natu 	type1 = info1 & VM_INTINFO_TYPE;
1898091d4532SNeel Natu 	vector1 = info1 & 0xff;
1899091d4532SNeel Natu 	if (type1 == VM_INTINFO_HWEXCEPTION && vector1 == IDT_DF) {
1900091d4532SNeel Natu 		VCPU_CTR2(vm, vcpuid, "triple fault: info1(%#lx), info2(%#lx)",
1901091d4532SNeel Natu 		    info1, info2);
1902091d4532SNeel Natu 		vm_suspend(vm, VM_SUSPEND_TRIPLEFAULT);
1903091d4532SNeel Natu 		*retinfo = 0;
1904091d4532SNeel Natu 		return (0);
1905091d4532SNeel Natu 	}
1906091d4532SNeel Natu 
1907091d4532SNeel Natu 	/*
1908091d4532SNeel Natu 	 * Table 6-5 "Conditions for Generating a Double Fault", Intel SDM, Vol3
1909091d4532SNeel Natu 	 */
1910091d4532SNeel Natu 	exc1 = exception_class(info1);
1911091d4532SNeel Natu 	exc2 = exception_class(info2);
1912091d4532SNeel Natu 	if ((exc1 == EXC_CONTRIBUTORY && exc2 == EXC_CONTRIBUTORY) ||
1913091d4532SNeel Natu 	    (exc1 == EXC_PAGEFAULT && exc2 != EXC_BENIGN)) {
1914091d4532SNeel Natu 		/* Convert nested fault into a double fault. */
1915091d4532SNeel Natu 		*retinfo = IDT_DF;
1916091d4532SNeel Natu 		*retinfo |= VM_INTINFO_VALID | VM_INTINFO_HWEXCEPTION;
1917091d4532SNeel Natu 		*retinfo |= VM_INTINFO_DEL_ERRCODE;
1918091d4532SNeel Natu 	} else {
1919091d4532SNeel Natu 		/* Handle exceptions serially */
1920091d4532SNeel Natu 		*retinfo = info2;
1921091d4532SNeel Natu 	}
1922091d4532SNeel Natu 	return (1);
1923091d4532SNeel Natu }
1924091d4532SNeel Natu 
1925091d4532SNeel Natu static uint64_t
1926091d4532SNeel Natu vcpu_exception_intinfo(struct vcpu *vcpu)
1927091d4532SNeel Natu {
1928091d4532SNeel Natu 	uint64_t info = 0;
1929091d4532SNeel Natu 
1930091d4532SNeel Natu 	if (vcpu->exception_pending) {
1931c9c75df4SNeel Natu 		info = vcpu->exc_vector & 0xff;
1932091d4532SNeel Natu 		info |= VM_INTINFO_VALID | VM_INTINFO_HWEXCEPTION;
1933c9c75df4SNeel Natu 		if (vcpu->exc_errcode_valid) {
1934091d4532SNeel Natu 			info |= VM_INTINFO_DEL_ERRCODE;
1935c9c75df4SNeel Natu 			info |= (uint64_t)vcpu->exc_errcode << 32;
1936091d4532SNeel Natu 		}
1937091d4532SNeel Natu 	}
1938091d4532SNeel Natu 	return (info);
1939091d4532SNeel Natu }
1940091d4532SNeel Natu 
1941091d4532SNeel Natu int
1942091d4532SNeel Natu vm_entry_intinfo(struct vm *vm, int vcpuid, uint64_t *retinfo)
1943091d4532SNeel Natu {
1944091d4532SNeel Natu 	struct vcpu *vcpu;
1945091d4532SNeel Natu 	uint64_t info1, info2;
1946091d4532SNeel Natu 	int valid;
1947091d4532SNeel Natu 
1948091d4532SNeel Natu 	KASSERT(vcpuid >= 0 && vcpuid < VM_MAXCPU, ("invalid vcpu %d", vcpuid));
1949091d4532SNeel Natu 
1950091d4532SNeel Natu 	vcpu = &vm->vcpu[vcpuid];
1951091d4532SNeel Natu 
1952091d4532SNeel Natu 	info1 = vcpu->exitintinfo;
1953091d4532SNeel Natu 	vcpu->exitintinfo = 0;
1954091d4532SNeel Natu 
1955091d4532SNeel Natu 	info2 = 0;
1956091d4532SNeel Natu 	if (vcpu->exception_pending) {
1957091d4532SNeel Natu 		info2 = vcpu_exception_intinfo(vcpu);
1958091d4532SNeel Natu 		vcpu->exception_pending = 0;
1959091d4532SNeel Natu 		VCPU_CTR2(vm, vcpuid, "Exception %d delivered: %#lx",
1960c9c75df4SNeel Natu 		    vcpu->exc_vector, info2);
1961091d4532SNeel Natu 	}
1962091d4532SNeel Natu 
1963091d4532SNeel Natu 	if ((info1 & VM_INTINFO_VALID) && (info2 & VM_INTINFO_VALID)) {
1964091d4532SNeel Natu 		valid = nested_fault(vm, vcpuid, info1, info2, retinfo);
1965091d4532SNeel Natu 	} else if (info1 & VM_INTINFO_VALID) {
1966091d4532SNeel Natu 		*retinfo = info1;
1967091d4532SNeel Natu 		valid = 1;
1968091d4532SNeel Natu 	} else if (info2 & VM_INTINFO_VALID) {
1969091d4532SNeel Natu 		*retinfo = info2;
1970091d4532SNeel Natu 		valid = 1;
1971091d4532SNeel Natu 	} else {
1972091d4532SNeel Natu 		valid = 0;
1973091d4532SNeel Natu 	}
1974091d4532SNeel Natu 
1975091d4532SNeel Natu 	if (valid) {
1976091d4532SNeel Natu 		VCPU_CTR4(vm, vcpuid, "%s: info1(%#lx), info2(%#lx), "
1977091d4532SNeel Natu 		    "retinfo(%#lx)", __func__, info1, info2, *retinfo);
1978091d4532SNeel Natu 	}
1979091d4532SNeel Natu 
1980091d4532SNeel Natu 	return (valid);
1981091d4532SNeel Natu }
1982091d4532SNeel Natu 
1983091d4532SNeel Natu int
1984091d4532SNeel Natu vm_get_intinfo(struct vm *vm, int vcpuid, uint64_t *info1, uint64_t *info2)
1985091d4532SNeel Natu {
1986091d4532SNeel Natu 	struct vcpu *vcpu;
1987091d4532SNeel Natu 
1988091d4532SNeel Natu 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
1989091d4532SNeel Natu 		return (EINVAL);
1990091d4532SNeel Natu 
1991091d4532SNeel Natu 	vcpu = &vm->vcpu[vcpuid];
1992091d4532SNeel Natu 	*info1 = vcpu->exitintinfo;
1993091d4532SNeel Natu 	*info2 = vcpu_exception_intinfo(vcpu);
1994091d4532SNeel Natu 	return (0);
1995091d4532SNeel Natu }
1996091d4532SNeel Natu 
1997091d4532SNeel Natu int
1998c9c75df4SNeel Natu vm_inject_exception(struct vm *vm, int vcpuid, int vector, int errcode_valid,
1999c9c75df4SNeel Natu     uint32_t errcode, int restart_instruction)
2000366f6083SPeter Grehan {
2001dc506506SNeel Natu 	struct vcpu *vcpu;
200247b9935dSNeel Natu 	uint64_t regval;
20032ce12423SNeel Natu 	int error;
2004dc506506SNeel Natu 
2005366f6083SPeter Grehan 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2006366f6083SPeter Grehan 		return (EINVAL);
2007366f6083SPeter Grehan 
2008c9c75df4SNeel Natu 	if (vector < 0 || vector >= 32)
2009366f6083SPeter Grehan 		return (EINVAL);
2010366f6083SPeter Grehan 
2011091d4532SNeel Natu 	/*
2012091d4532SNeel Natu 	 * A double fault exception should never be injected directly into
2013091d4532SNeel Natu 	 * the guest. It is a derived exception that results from specific
2014091d4532SNeel Natu 	 * combinations of nested faults.
2015091d4532SNeel Natu 	 */
2016c9c75df4SNeel Natu 	if (vector == IDT_DF)
2017091d4532SNeel Natu 		return (EINVAL);
2018091d4532SNeel Natu 
2019dc506506SNeel Natu 	vcpu = &vm->vcpu[vcpuid];
2020366f6083SPeter Grehan 
2021dc506506SNeel Natu 	if (vcpu->exception_pending) {
2022dc506506SNeel Natu 		VCPU_CTR2(vm, vcpuid, "Unable to inject exception %d due to "
2023c9c75df4SNeel Natu 		    "pending exception %d", vector, vcpu->exc_vector);
2024dc506506SNeel Natu 		return (EBUSY);
2025dc506506SNeel Natu 	}
2026dc506506SNeel Natu 
202747b9935dSNeel Natu 	if (errcode_valid) {
202847b9935dSNeel Natu 		/*
202947b9935dSNeel Natu 		 * Exceptions don't deliver an error code in real mode.
203047b9935dSNeel Natu 		 */
203147b9935dSNeel Natu 		error = vm_get_register(vm, vcpuid, VM_REG_GUEST_CR0, &regval);
203247b9935dSNeel Natu 		KASSERT(!error, ("%s: error %d getting CR0", __func__, error));
203347b9935dSNeel Natu 		if (!(regval & CR0_PE))
203447b9935dSNeel Natu 			errcode_valid = 0;
203547b9935dSNeel Natu 	}
203647b9935dSNeel Natu 
20372ce12423SNeel Natu 	/*
20382ce12423SNeel Natu 	 * From section 26.6.1 "Interruptibility State" in Intel SDM:
20392ce12423SNeel Natu 	 *
20402ce12423SNeel Natu 	 * Event blocking by "STI" or "MOV SS" is cleared after guest executes
20412ce12423SNeel Natu 	 * one instruction or incurs an exception.
20422ce12423SNeel Natu 	 */
20432ce12423SNeel Natu 	error = vm_set_register(vm, vcpuid, VM_REG_GUEST_INTR_SHADOW, 0);
20442ce12423SNeel Natu 	KASSERT(error == 0, ("%s: error %d clearing interrupt shadow",
20452ce12423SNeel Natu 	    __func__, error));
20462ce12423SNeel Natu 
2047c9c75df4SNeel Natu 	if (restart_instruction)
2048c9c75df4SNeel Natu 		vm_restart_instruction(vm, vcpuid);
2049c9c75df4SNeel Natu 
2050dc506506SNeel Natu 	vcpu->exception_pending = 1;
2051c9c75df4SNeel Natu 	vcpu->exc_vector = vector;
2052c9c75df4SNeel Natu 	vcpu->exc_errcode = errcode;
2053c9c75df4SNeel Natu 	vcpu->exc_errcode_valid = errcode_valid;
2054c9c75df4SNeel Natu 	VCPU_CTR1(vm, vcpuid, "Exception %d pending", vector);
2055dc506506SNeel Natu 	return (0);
2056dc506506SNeel Natu }
2057dc506506SNeel Natu 
2058d37f2adbSNeel Natu void
2059d37f2adbSNeel Natu vm_inject_fault(void *vmarg, int vcpuid, int vector, int errcode_valid,
2060d37f2adbSNeel Natu     int errcode)
2061dc506506SNeel Natu {
2062d37f2adbSNeel Natu 	struct vm *vm;
2063c9c75df4SNeel Natu 	int error, restart_instruction;
2064dc506506SNeel Natu 
2065d37f2adbSNeel Natu 	vm = vmarg;
2066c9c75df4SNeel Natu 	restart_instruction = 1;
2067d37f2adbSNeel Natu 
2068c9c75df4SNeel Natu 	error = vm_inject_exception(vm, vcpuid, vector, errcode_valid,
2069c9c75df4SNeel Natu 	    errcode, restart_instruction);
2070dc506506SNeel Natu 	KASSERT(error == 0, ("vm_inject_exception error %d", error));
2071dc506506SNeel Natu }
2072dc506506SNeel Natu 
2073dc506506SNeel Natu void
2074d37f2adbSNeel Natu vm_inject_pf(void *vmarg, int vcpuid, int error_code, uint64_t cr2)
2075fd949af6SNeel Natu {
2076d37f2adbSNeel Natu 	struct vm *vm;
207737a723a5SNeel Natu 	int error;
207837a723a5SNeel Natu 
2079d37f2adbSNeel Natu 	vm = vmarg;
208037a723a5SNeel Natu 	VCPU_CTR2(vm, vcpuid, "Injecting page fault: error_code %#x, cr2 %#lx",
208137a723a5SNeel Natu 	    error_code, cr2);
208237a723a5SNeel Natu 
208337a723a5SNeel Natu 	error = vm_set_register(vm, vcpuid, VM_REG_GUEST_CR2, cr2);
208437a723a5SNeel Natu 	KASSERT(error == 0, ("vm_set_register(cr2) error %d", error));
2085fd949af6SNeel Natu 
2086d37f2adbSNeel Natu 	vm_inject_fault(vm, vcpuid, IDT_PF, 1, error_code);
2087366f6083SPeter Grehan }
2088366f6083SPeter Grehan 
208961592433SNeel Natu static VMM_STAT(VCPU_NMI_COUNT, "number of NMIs delivered to vcpu");
2090366f6083SPeter Grehan 
2091f352ff0cSNeel Natu int
2092f352ff0cSNeel Natu vm_inject_nmi(struct vm *vm, int vcpuid)
2093f352ff0cSNeel Natu {
2094f352ff0cSNeel Natu 	struct vcpu *vcpu;
2095f352ff0cSNeel Natu 
2096f352ff0cSNeel Natu 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2097366f6083SPeter Grehan 		return (EINVAL);
2098366f6083SPeter Grehan 
2099f352ff0cSNeel Natu 	vcpu = &vm->vcpu[vcpuid];
2100f352ff0cSNeel Natu 
2101f352ff0cSNeel Natu 	vcpu->nmi_pending = 1;
2102de5ea6b6SNeel Natu 	vcpu_notify_event(vm, vcpuid, false);
2103f352ff0cSNeel Natu 	return (0);
2104f352ff0cSNeel Natu }
2105f352ff0cSNeel Natu 
2106f352ff0cSNeel Natu int
2107f352ff0cSNeel Natu vm_nmi_pending(struct vm *vm, int vcpuid)
2108f352ff0cSNeel Natu {
2109f352ff0cSNeel Natu 	struct vcpu *vcpu;
2110f352ff0cSNeel Natu 
2111f352ff0cSNeel Natu 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2112f352ff0cSNeel Natu 		panic("vm_nmi_pending: invalid vcpuid %d", vcpuid);
2113f352ff0cSNeel Natu 
2114f352ff0cSNeel Natu 	vcpu = &vm->vcpu[vcpuid];
2115f352ff0cSNeel Natu 
2116f352ff0cSNeel Natu 	return (vcpu->nmi_pending);
2117f352ff0cSNeel Natu }
2118f352ff0cSNeel Natu 
2119f352ff0cSNeel Natu void
2120f352ff0cSNeel Natu vm_nmi_clear(struct vm *vm, int vcpuid)
2121f352ff0cSNeel Natu {
2122f352ff0cSNeel Natu 	struct vcpu *vcpu;
2123f352ff0cSNeel Natu 
2124f352ff0cSNeel Natu 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2125f352ff0cSNeel Natu 		panic("vm_nmi_pending: invalid vcpuid %d", vcpuid);
2126f352ff0cSNeel Natu 
2127f352ff0cSNeel Natu 	vcpu = &vm->vcpu[vcpuid];
2128f352ff0cSNeel Natu 
2129f352ff0cSNeel Natu 	if (vcpu->nmi_pending == 0)
2130f352ff0cSNeel Natu 		panic("vm_nmi_clear: inconsistent nmi_pending state");
2131f352ff0cSNeel Natu 
2132f352ff0cSNeel Natu 	vcpu->nmi_pending = 0;
2133f352ff0cSNeel Natu 	vmm_stat_incr(vm, vcpuid, VCPU_NMI_COUNT, 1);
2134366f6083SPeter Grehan }
2135366f6083SPeter Grehan 
21360775fbb4STycho Nightingale static VMM_STAT(VCPU_EXTINT_COUNT, "number of ExtINTs delivered to vcpu");
21370775fbb4STycho Nightingale 
21380775fbb4STycho Nightingale int
21390775fbb4STycho Nightingale vm_inject_extint(struct vm *vm, int vcpuid)
21400775fbb4STycho Nightingale {
21410775fbb4STycho Nightingale 	struct vcpu *vcpu;
21420775fbb4STycho Nightingale 
21430775fbb4STycho Nightingale 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
21440775fbb4STycho Nightingale 		return (EINVAL);
21450775fbb4STycho Nightingale 
21460775fbb4STycho Nightingale 	vcpu = &vm->vcpu[vcpuid];
21470775fbb4STycho Nightingale 
21480775fbb4STycho Nightingale 	vcpu->extint_pending = 1;
21490775fbb4STycho Nightingale 	vcpu_notify_event(vm, vcpuid, false);
21500775fbb4STycho Nightingale 	return (0);
21510775fbb4STycho Nightingale }
21520775fbb4STycho Nightingale 
21530775fbb4STycho Nightingale int
21540775fbb4STycho Nightingale vm_extint_pending(struct vm *vm, int vcpuid)
21550775fbb4STycho Nightingale {
21560775fbb4STycho Nightingale 	struct vcpu *vcpu;
21570775fbb4STycho Nightingale 
21580775fbb4STycho Nightingale 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
21590775fbb4STycho Nightingale 		panic("vm_extint_pending: invalid vcpuid %d", vcpuid);
21600775fbb4STycho Nightingale 
21610775fbb4STycho Nightingale 	vcpu = &vm->vcpu[vcpuid];
21620775fbb4STycho Nightingale 
21630775fbb4STycho Nightingale 	return (vcpu->extint_pending);
21640775fbb4STycho Nightingale }
21650775fbb4STycho Nightingale 
21660775fbb4STycho Nightingale void
21670775fbb4STycho Nightingale vm_extint_clear(struct vm *vm, int vcpuid)
21680775fbb4STycho Nightingale {
21690775fbb4STycho Nightingale 	struct vcpu *vcpu;
21700775fbb4STycho Nightingale 
21710775fbb4STycho Nightingale 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
21720775fbb4STycho Nightingale 		panic("vm_extint_pending: invalid vcpuid %d", vcpuid);
21730775fbb4STycho Nightingale 
21740775fbb4STycho Nightingale 	vcpu = &vm->vcpu[vcpuid];
21750775fbb4STycho Nightingale 
21760775fbb4STycho Nightingale 	if (vcpu->extint_pending == 0)
21770775fbb4STycho Nightingale 		panic("vm_extint_clear: inconsistent extint_pending state");
21780775fbb4STycho Nightingale 
21790775fbb4STycho Nightingale 	vcpu->extint_pending = 0;
21800775fbb4STycho Nightingale 	vmm_stat_incr(vm, vcpuid, VCPU_EXTINT_COUNT, 1);
21810775fbb4STycho Nightingale }
21820775fbb4STycho Nightingale 
2183366f6083SPeter Grehan int
2184366f6083SPeter Grehan vm_get_capability(struct vm *vm, int vcpu, int type, int *retval)
2185366f6083SPeter Grehan {
2186366f6083SPeter Grehan 	if (vcpu < 0 || vcpu >= VM_MAXCPU)
2187366f6083SPeter Grehan 		return (EINVAL);
2188366f6083SPeter Grehan 
2189366f6083SPeter Grehan 	if (type < 0 || type >= VM_CAP_MAX)
2190366f6083SPeter Grehan 		return (EINVAL);
2191366f6083SPeter Grehan 
2192366f6083SPeter Grehan 	return (VMGETCAP(vm->cookie, vcpu, type, retval));
2193366f6083SPeter Grehan }
2194366f6083SPeter Grehan 
2195366f6083SPeter Grehan int
2196366f6083SPeter Grehan vm_set_capability(struct vm *vm, int vcpu, int type, int val)
2197366f6083SPeter Grehan {
2198366f6083SPeter Grehan 	if (vcpu < 0 || vcpu >= VM_MAXCPU)
2199366f6083SPeter Grehan 		return (EINVAL);
2200366f6083SPeter Grehan 
2201366f6083SPeter Grehan 	if (type < 0 || type >= VM_CAP_MAX)
2202366f6083SPeter Grehan 		return (EINVAL);
2203366f6083SPeter Grehan 
2204366f6083SPeter Grehan 	return (VMSETCAP(vm->cookie, vcpu, type, val));
2205366f6083SPeter Grehan }
2206366f6083SPeter Grehan 
2207366f6083SPeter Grehan struct vlapic *
2208366f6083SPeter Grehan vm_lapic(struct vm *vm, int cpu)
2209366f6083SPeter Grehan {
2210366f6083SPeter Grehan 	return (vm->vcpu[cpu].vlapic);
2211366f6083SPeter Grehan }
2212366f6083SPeter Grehan 
2213565bbb86SNeel Natu struct vioapic *
2214565bbb86SNeel Natu vm_ioapic(struct vm *vm)
2215565bbb86SNeel Natu {
2216565bbb86SNeel Natu 
2217565bbb86SNeel Natu 	return (vm->vioapic);
2218565bbb86SNeel Natu }
2219565bbb86SNeel Natu 
222008e3ff32SNeel Natu struct vhpet *
222108e3ff32SNeel Natu vm_hpet(struct vm *vm)
222208e3ff32SNeel Natu {
222308e3ff32SNeel Natu 
222408e3ff32SNeel Natu 	return (vm->vhpet);
222508e3ff32SNeel Natu }
222608e3ff32SNeel Natu 
2227366f6083SPeter Grehan boolean_t
2228366f6083SPeter Grehan vmm_is_pptdev(int bus, int slot, int func)
2229366f6083SPeter Grehan {
223007044a96SNeel Natu 	int found, i, n;
223107044a96SNeel Natu 	int b, s, f;
2232366f6083SPeter Grehan 	char *val, *cp, *cp2;
2233366f6083SPeter Grehan 
2234366f6083SPeter Grehan 	/*
223507044a96SNeel Natu 	 * XXX
223607044a96SNeel Natu 	 * The length of an environment variable is limited to 128 bytes which
223707044a96SNeel Natu 	 * puts an upper limit on the number of passthru devices that may be
223807044a96SNeel Natu 	 * specified using a single environment variable.
223907044a96SNeel Natu 	 *
224007044a96SNeel Natu 	 * Work around this by scanning multiple environment variable
224107044a96SNeel Natu 	 * names instead of a single one - yuck!
2242366f6083SPeter Grehan 	 */
224307044a96SNeel Natu 	const char *names[] = { "pptdevs", "pptdevs2", "pptdevs3", NULL };
224407044a96SNeel Natu 
224507044a96SNeel Natu 	/* set pptdevs="1/2/3 4/5/6 7/8/9 10/11/12" */
2246366f6083SPeter Grehan 	found = 0;
224707044a96SNeel Natu 	for (i = 0; names[i] != NULL && !found; i++) {
22482be111bfSDavide Italiano 		cp = val = kern_getenv(names[i]);
2249366f6083SPeter Grehan 		while (cp != NULL && *cp != '\0') {
2250366f6083SPeter Grehan 			if ((cp2 = strchr(cp, ' ')) != NULL)
2251366f6083SPeter Grehan 				*cp2 = '\0';
2252366f6083SPeter Grehan 
2253366f6083SPeter Grehan 			n = sscanf(cp, "%d/%d/%d", &b, &s, &f);
2254366f6083SPeter Grehan 			if (n == 3 && bus == b && slot == s && func == f) {
2255366f6083SPeter Grehan 				found = 1;
2256366f6083SPeter Grehan 				break;
2257366f6083SPeter Grehan 			}
2258366f6083SPeter Grehan 
2259366f6083SPeter Grehan 			if (cp2 != NULL)
2260366f6083SPeter Grehan 				*cp2++ = ' ';
2261366f6083SPeter Grehan 
2262366f6083SPeter Grehan 			cp = cp2;
2263366f6083SPeter Grehan 		}
2264366f6083SPeter Grehan 		freeenv(val);
226507044a96SNeel Natu 	}
2266366f6083SPeter Grehan 	return (found);
2267366f6083SPeter Grehan }
2268366f6083SPeter Grehan 
2269366f6083SPeter Grehan void *
2270366f6083SPeter Grehan vm_iommu_domain(struct vm *vm)
2271366f6083SPeter Grehan {
2272366f6083SPeter Grehan 
2273366f6083SPeter Grehan 	return (vm->iommu);
2274366f6083SPeter Grehan }
2275366f6083SPeter Grehan 
227675dd3366SNeel Natu int
2277f80330a8SNeel Natu vcpu_set_state(struct vm *vm, int vcpuid, enum vcpu_state newstate,
2278f80330a8SNeel Natu     bool from_idle)
2279366f6083SPeter Grehan {
228075dd3366SNeel Natu 	int error;
2281366f6083SPeter Grehan 	struct vcpu *vcpu;
2282366f6083SPeter Grehan 
2283366f6083SPeter Grehan 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2284366f6083SPeter Grehan 		panic("vm_set_run_state: invalid vcpuid %d", vcpuid);
2285366f6083SPeter Grehan 
2286366f6083SPeter Grehan 	vcpu = &vm->vcpu[vcpuid];
2287366f6083SPeter Grehan 
228875dd3366SNeel Natu 	vcpu_lock(vcpu);
2289248e6799SNeel Natu 	error = vcpu_set_state_locked(vm, vcpuid, newstate, from_idle);
229075dd3366SNeel Natu 	vcpu_unlock(vcpu);
229175dd3366SNeel Natu 
229275dd3366SNeel Natu 	return (error);
229375dd3366SNeel Natu }
229475dd3366SNeel Natu 
229575dd3366SNeel Natu enum vcpu_state
2296d3c11f40SPeter Grehan vcpu_get_state(struct vm *vm, int vcpuid, int *hostcpu)
2297366f6083SPeter Grehan {
2298366f6083SPeter Grehan 	struct vcpu *vcpu;
229975dd3366SNeel Natu 	enum vcpu_state state;
2300366f6083SPeter Grehan 
2301366f6083SPeter Grehan 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2302366f6083SPeter Grehan 		panic("vm_get_run_state: invalid vcpuid %d", vcpuid);
2303366f6083SPeter Grehan 
2304366f6083SPeter Grehan 	vcpu = &vm->vcpu[vcpuid];
2305366f6083SPeter Grehan 
230675dd3366SNeel Natu 	vcpu_lock(vcpu);
230775dd3366SNeel Natu 	state = vcpu->state;
2308d3c11f40SPeter Grehan 	if (hostcpu != NULL)
2309d3c11f40SPeter Grehan 		*hostcpu = vcpu->hostcpu;
231075dd3366SNeel Natu 	vcpu_unlock(vcpu);
2311366f6083SPeter Grehan 
231275dd3366SNeel Natu 	return (state);
2313366f6083SPeter Grehan }
2314366f6083SPeter Grehan 
231595ebc360SNeel Natu int
2316366f6083SPeter Grehan vm_activate_cpu(struct vm *vm, int vcpuid)
2317366f6083SPeter Grehan {
2318366f6083SPeter Grehan 
231995ebc360SNeel Natu 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
232095ebc360SNeel Natu 		return (EINVAL);
232195ebc360SNeel Natu 
232295ebc360SNeel Natu 	if (CPU_ISSET(vcpuid, &vm->active_cpus))
232395ebc360SNeel Natu 		return (EBUSY);
232422d822c6SNeel Natu 
232522d822c6SNeel Natu 	VCPU_CTR0(vm, vcpuid, "activated");
232622d822c6SNeel Natu 	CPU_SET_ATOMIC(vcpuid, &vm->active_cpus);
232795ebc360SNeel Natu 	return (0);
2328366f6083SPeter Grehan }
2329366f6083SPeter Grehan 
2330fc276d92SJohn Baldwin int
2331fc276d92SJohn Baldwin vm_suspend_cpu(struct vm *vm, int vcpuid)
2332fc276d92SJohn Baldwin {
2333fc276d92SJohn Baldwin 	int i;
2334fc276d92SJohn Baldwin 
2335fc276d92SJohn Baldwin 	if (vcpuid < -1 || vcpuid >= VM_MAXCPU)
2336fc276d92SJohn Baldwin 		return (EINVAL);
2337fc276d92SJohn Baldwin 
2338fc276d92SJohn Baldwin 	if (vcpuid == -1) {
2339fc276d92SJohn Baldwin 		vm->debug_cpus = vm->active_cpus;
2340fc276d92SJohn Baldwin 		for (i = 0; i < VM_MAXCPU; i++) {
2341fc276d92SJohn Baldwin 			if (CPU_ISSET(i, &vm->active_cpus))
2342fc276d92SJohn Baldwin 				vcpu_notify_event(vm, i, false);
2343fc276d92SJohn Baldwin 		}
2344fc276d92SJohn Baldwin 	} else {
2345fc276d92SJohn Baldwin 		if (!CPU_ISSET(vcpuid, &vm->active_cpus))
2346fc276d92SJohn Baldwin 			return (EINVAL);
2347fc276d92SJohn Baldwin 
2348fc276d92SJohn Baldwin 		CPU_SET_ATOMIC(vcpuid, &vm->debug_cpus);
2349fc276d92SJohn Baldwin 		vcpu_notify_event(vm, vcpuid, false);
2350fc276d92SJohn Baldwin 	}
2351fc276d92SJohn Baldwin 	return (0);
2352fc276d92SJohn Baldwin }
2353fc276d92SJohn Baldwin 
2354fc276d92SJohn Baldwin int
2355fc276d92SJohn Baldwin vm_resume_cpu(struct vm *vm, int vcpuid)
2356fc276d92SJohn Baldwin {
2357fc276d92SJohn Baldwin 
2358fc276d92SJohn Baldwin 	if (vcpuid < -1 || vcpuid >= VM_MAXCPU)
2359fc276d92SJohn Baldwin 		return (EINVAL);
2360fc276d92SJohn Baldwin 
2361fc276d92SJohn Baldwin 	if (vcpuid == -1) {
2362fc276d92SJohn Baldwin 		CPU_ZERO(&vm->debug_cpus);
2363fc276d92SJohn Baldwin 	} else {
2364fc276d92SJohn Baldwin 		if (!CPU_ISSET(vcpuid, &vm->debug_cpus))
2365fc276d92SJohn Baldwin 			return (EINVAL);
2366fc276d92SJohn Baldwin 
2367fc276d92SJohn Baldwin 		CPU_CLR_ATOMIC(vcpuid, &vm->debug_cpus);
2368fc276d92SJohn Baldwin 	}
2369fc276d92SJohn Baldwin 	return (0);
2370fc276d92SJohn Baldwin }
2371fc276d92SJohn Baldwin 
2372fc276d92SJohn Baldwin int
2373fc276d92SJohn Baldwin vcpu_debugged(struct vm *vm, int vcpuid)
2374fc276d92SJohn Baldwin {
2375fc276d92SJohn Baldwin 
2376fc276d92SJohn Baldwin 	return (CPU_ISSET(vcpuid, &vm->debug_cpus));
2377fc276d92SJohn Baldwin }
2378fc276d92SJohn Baldwin 
2379a5615c90SPeter Grehan cpuset_t
2380366f6083SPeter Grehan vm_active_cpus(struct vm *vm)
2381366f6083SPeter Grehan {
2382366f6083SPeter Grehan 
2383366f6083SPeter Grehan 	return (vm->active_cpus);
2384366f6083SPeter Grehan }
2385366f6083SPeter Grehan 
238695ebc360SNeel Natu cpuset_t
2387fc276d92SJohn Baldwin vm_debug_cpus(struct vm *vm)
2388fc276d92SJohn Baldwin {
2389fc276d92SJohn Baldwin 
2390fc276d92SJohn Baldwin 	return (vm->debug_cpus);
2391fc276d92SJohn Baldwin }
2392fc276d92SJohn Baldwin 
2393fc276d92SJohn Baldwin cpuset_t
239495ebc360SNeel Natu vm_suspended_cpus(struct vm *vm)
239595ebc360SNeel Natu {
239695ebc360SNeel Natu 
239795ebc360SNeel Natu 	return (vm->suspended_cpus);
239895ebc360SNeel Natu }
239995ebc360SNeel Natu 
2400366f6083SPeter Grehan void *
2401366f6083SPeter Grehan vcpu_stats(struct vm *vm, int vcpuid)
2402366f6083SPeter Grehan {
2403366f6083SPeter Grehan 
2404366f6083SPeter Grehan 	return (vm->vcpu[vcpuid].stats);
2405366f6083SPeter Grehan }
2406e9027382SNeel Natu 
2407e9027382SNeel Natu int
2408e9027382SNeel Natu vm_get_x2apic_state(struct vm *vm, int vcpuid, enum x2apic_state *state)
2409e9027382SNeel Natu {
2410e9027382SNeel Natu 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2411e9027382SNeel Natu 		return (EINVAL);
2412e9027382SNeel Natu 
2413e9027382SNeel Natu 	*state = vm->vcpu[vcpuid].x2apic_state;
2414e9027382SNeel Natu 
2415e9027382SNeel Natu 	return (0);
2416e9027382SNeel Natu }
2417e9027382SNeel Natu 
2418e9027382SNeel Natu int
2419e9027382SNeel Natu vm_set_x2apic_state(struct vm *vm, int vcpuid, enum x2apic_state state)
2420e9027382SNeel Natu {
2421e9027382SNeel Natu 	if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2422e9027382SNeel Natu 		return (EINVAL);
2423e9027382SNeel Natu 
24243f23d3caSNeel Natu 	if (state >= X2APIC_STATE_LAST)
2425e9027382SNeel Natu 		return (EINVAL);
2426e9027382SNeel Natu 
2427e9027382SNeel Natu 	vm->vcpu[vcpuid].x2apic_state = state;
2428e9027382SNeel Natu 
242973820fb0SNeel Natu 	vlapic_set_x2apic_state(vm, vcpuid, state);
243073820fb0SNeel Natu 
2431e9027382SNeel Natu 	return (0);
2432e9027382SNeel Natu }
243375dd3366SNeel Natu 
243422821874SNeel Natu /*
243522821874SNeel Natu  * This function is called to ensure that a vcpu "sees" a pending event
243622821874SNeel Natu  * as soon as possible:
243722821874SNeel Natu  * - If the vcpu thread is sleeping then it is woken up.
243822821874SNeel Natu  * - If the vcpu is running on a different host_cpu then an IPI will be directed
243922821874SNeel Natu  *   to the host_cpu to cause the vcpu to trap into the hypervisor.
244022821874SNeel Natu  */
2441248e6799SNeel Natu static void
2442248e6799SNeel Natu vcpu_notify_event_locked(struct vcpu *vcpu, bool lapic_intr)
244375dd3366SNeel Natu {
244475dd3366SNeel Natu 	int hostcpu;
244575dd3366SNeel Natu 
244675dd3366SNeel Natu 	hostcpu = vcpu->hostcpu;
2447ef39d7e9SNeel Natu 	if (vcpu->state == VCPU_RUNNING) {
2448ef39d7e9SNeel Natu 		KASSERT(hostcpu != NOCPU, ("vcpu running on invalid hostcpu"));
2449de5ea6b6SNeel Natu 		if (hostcpu != curcpu) {
2450ef39d7e9SNeel Natu 			if (lapic_intr) {
2451add611fdSNeel Natu 				vlapic_post_intr(vcpu->vlapic, hostcpu,
2452add611fdSNeel Natu 				    vmm_ipinum);
2453ef39d7e9SNeel Natu 			} else {
245475dd3366SNeel Natu 				ipi_cpu(hostcpu, vmm_ipinum);
245575dd3366SNeel Natu 			}
2456ef39d7e9SNeel Natu 		} else {
2457ef39d7e9SNeel Natu 			/*
2458ef39d7e9SNeel Natu 			 * If the 'vcpu' is running on 'curcpu' then it must
2459ef39d7e9SNeel Natu 			 * be sending a notification to itself (e.g. SELF_IPI).
2460ef39d7e9SNeel Natu 			 * The pending event will be picked up when the vcpu
2461ef39d7e9SNeel Natu 			 * transitions back to guest context.
2462ef39d7e9SNeel Natu 			 */
2463ef39d7e9SNeel Natu 		}
2464ef39d7e9SNeel Natu 	} else {
2465ef39d7e9SNeel Natu 		KASSERT(hostcpu == NOCPU, ("vcpu state %d not consistent "
2466ef39d7e9SNeel Natu 		    "with hostcpu %d", vcpu->state, hostcpu));
2467366f6083SPeter Grehan 		if (vcpu->state == VCPU_SLEEPING)
2468366f6083SPeter Grehan 			wakeup_one(vcpu);
2469366f6083SPeter Grehan 	}
2470248e6799SNeel Natu }
2471248e6799SNeel Natu 
2472248e6799SNeel Natu void
2473248e6799SNeel Natu vcpu_notify_event(struct vm *vm, int vcpuid, bool lapic_intr)
2474248e6799SNeel Natu {
2475248e6799SNeel Natu 	struct vcpu *vcpu = &vm->vcpu[vcpuid];
2476248e6799SNeel Natu 
2477248e6799SNeel Natu 	vcpu_lock(vcpu);
2478248e6799SNeel Natu 	vcpu_notify_event_locked(vcpu, lapic_intr);
2479f76fc5d4SNeel Natu 	vcpu_unlock(vcpu);
2480f76fc5d4SNeel Natu }
2481318224bbSNeel Natu 
2482318224bbSNeel Natu struct vmspace *
2483318224bbSNeel Natu vm_get_vmspace(struct vm *vm)
2484318224bbSNeel Natu {
2485318224bbSNeel Natu 
2486318224bbSNeel Natu 	return (vm->vmspace);
2487318224bbSNeel Natu }
2488565bbb86SNeel Natu 
2489565bbb86SNeel Natu int
2490565bbb86SNeel Natu vm_apicid2vcpuid(struct vm *vm, int apicid)
2491565bbb86SNeel Natu {
2492565bbb86SNeel Natu 	/*
2493565bbb86SNeel Natu 	 * XXX apic id is assumed to be numerically identical to vcpu id
2494565bbb86SNeel Natu 	 */
2495565bbb86SNeel Natu 	return (apicid);
2496565bbb86SNeel Natu }
24975b8a8cd1SNeel Natu 
24985b8a8cd1SNeel Natu void
24995b8a8cd1SNeel Natu vm_smp_rendezvous(struct vm *vm, int vcpuid, cpuset_t dest,
25005b8a8cd1SNeel Natu     vm_rendezvous_func_t func, void *arg)
25015b8a8cd1SNeel Natu {
2502970955e4SNeel Natu 	int i;
2503970955e4SNeel Natu 
25045b8a8cd1SNeel Natu 	/*
25055b8a8cd1SNeel Natu 	 * Enforce that this function is called without any locks
25065b8a8cd1SNeel Natu 	 */
25075b8a8cd1SNeel Natu 	WITNESS_WARN(WARN_PANIC, NULL, "vm_smp_rendezvous");
25085b8a8cd1SNeel Natu 	KASSERT(vcpuid == -1 || (vcpuid >= 0 && vcpuid < VM_MAXCPU),
25095b8a8cd1SNeel Natu 	    ("vm_smp_rendezvous: invalid vcpuid %d", vcpuid));
25105b8a8cd1SNeel Natu 
25115b8a8cd1SNeel Natu restart:
25125b8a8cd1SNeel Natu 	mtx_lock(&vm->rendezvous_mtx);
25135b8a8cd1SNeel Natu 	if (vm->rendezvous_func != NULL) {
25145b8a8cd1SNeel Natu 		/*
25155b8a8cd1SNeel Natu 		 * If a rendezvous is already in progress then we need to
25165b8a8cd1SNeel Natu 		 * call the rendezvous handler in case this 'vcpuid' is one
25175b8a8cd1SNeel Natu 		 * of the targets of the rendezvous.
25185b8a8cd1SNeel Natu 		 */
25195b8a8cd1SNeel Natu 		RENDEZVOUS_CTR0(vm, vcpuid, "Rendezvous already in progress");
25205b8a8cd1SNeel Natu 		mtx_unlock(&vm->rendezvous_mtx);
25215b8a8cd1SNeel Natu 		vm_handle_rendezvous(vm, vcpuid);
25225b8a8cd1SNeel Natu 		goto restart;
25235b8a8cd1SNeel Natu 	}
25245b8a8cd1SNeel Natu 	KASSERT(vm->rendezvous_func == NULL, ("vm_smp_rendezvous: previous "
25255b8a8cd1SNeel Natu 	    "rendezvous is still in progress"));
25265b8a8cd1SNeel Natu 
25275b8a8cd1SNeel Natu 	RENDEZVOUS_CTR0(vm, vcpuid, "Initiating rendezvous");
25285b8a8cd1SNeel Natu 	vm->rendezvous_req_cpus = dest;
25295b8a8cd1SNeel Natu 	CPU_ZERO(&vm->rendezvous_done_cpus);
25305b8a8cd1SNeel Natu 	vm->rendezvous_arg = arg;
25315b8a8cd1SNeel Natu 	vm_set_rendezvous_func(vm, func);
25325b8a8cd1SNeel Natu 	mtx_unlock(&vm->rendezvous_mtx);
25335b8a8cd1SNeel Natu 
2534970955e4SNeel Natu 	/*
2535970955e4SNeel Natu 	 * Wake up any sleeping vcpus and trigger a VM-exit in any running
2536970955e4SNeel Natu 	 * vcpus so they handle the rendezvous as soon as possible.
2537970955e4SNeel Natu 	 */
2538970955e4SNeel Natu 	for (i = 0; i < VM_MAXCPU; i++) {
2539970955e4SNeel Natu 		if (CPU_ISSET(i, &dest))
2540970955e4SNeel Natu 			vcpu_notify_event(vm, i, false);
2541970955e4SNeel Natu 	}
2542970955e4SNeel Natu 
25435b8a8cd1SNeel Natu 	vm_handle_rendezvous(vm, vcpuid);
25445b8a8cd1SNeel Natu }
2545762fd208STycho Nightingale 
2546762fd208STycho Nightingale struct vatpic *
2547762fd208STycho Nightingale vm_atpic(struct vm *vm)
2548762fd208STycho Nightingale {
2549762fd208STycho Nightingale 	return (vm->vatpic);
2550762fd208STycho Nightingale }
2551e883c9bbSTycho Nightingale 
2552e883c9bbSTycho Nightingale struct vatpit *
2553e883c9bbSTycho Nightingale vm_atpit(struct vm *vm)
2554e883c9bbSTycho Nightingale {
2555e883c9bbSTycho Nightingale 	return (vm->vatpit);
2556e883c9bbSTycho Nightingale }
2557d17b5104SNeel Natu 
2558160ef77aSNeel Natu struct vpmtmr *
2559160ef77aSNeel Natu vm_pmtmr(struct vm *vm)
2560160ef77aSNeel Natu {
2561160ef77aSNeel Natu 
2562160ef77aSNeel Natu 	return (vm->vpmtmr);
2563160ef77aSNeel Natu }
2564160ef77aSNeel Natu 
25650dafa5cdSNeel Natu struct vrtc *
25660dafa5cdSNeel Natu vm_rtc(struct vm *vm)
25670dafa5cdSNeel Natu {
25680dafa5cdSNeel Natu 
25690dafa5cdSNeel Natu 	return (vm->vrtc);
25700dafa5cdSNeel Natu }
25710dafa5cdSNeel Natu 
2572d17b5104SNeel Natu enum vm_reg_name
2573d17b5104SNeel Natu vm_segment_name(int seg)
2574d17b5104SNeel Natu {
2575d17b5104SNeel Natu 	static enum vm_reg_name seg_names[] = {
2576d17b5104SNeel Natu 		VM_REG_GUEST_ES,
2577d17b5104SNeel Natu 		VM_REG_GUEST_CS,
2578d17b5104SNeel Natu 		VM_REG_GUEST_SS,
2579d17b5104SNeel Natu 		VM_REG_GUEST_DS,
2580d17b5104SNeel Natu 		VM_REG_GUEST_FS,
2581d17b5104SNeel Natu 		VM_REG_GUEST_GS
2582d17b5104SNeel Natu 	};
2583d17b5104SNeel Natu 
2584d17b5104SNeel Natu 	KASSERT(seg >= 0 && seg < nitems(seg_names),
2585d17b5104SNeel Natu 	    ("%s: invalid segment encoding %d", __func__, seg));
2586d17b5104SNeel Natu 	return (seg_names[seg]);
2587d17b5104SNeel Natu }
2588cf1d80d8SPeter Grehan 
2589d665d229SNeel Natu void
2590d665d229SNeel Natu vm_copy_teardown(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo,
2591d665d229SNeel Natu     int num_copyinfo)
2592d665d229SNeel Natu {
2593d665d229SNeel Natu 	int idx;
2594d665d229SNeel Natu 
2595d665d229SNeel Natu 	for (idx = 0; idx < num_copyinfo; idx++) {
2596d665d229SNeel Natu 		if (copyinfo[idx].cookie != NULL)
2597d665d229SNeel Natu 			vm_gpa_release(copyinfo[idx].cookie);
2598d665d229SNeel Natu 	}
2599d665d229SNeel Natu 	bzero(copyinfo, num_copyinfo * sizeof(struct vm_copyinfo));
2600d665d229SNeel Natu }
2601d665d229SNeel Natu 
2602d665d229SNeel Natu int
2603d665d229SNeel Natu vm_copy_setup(struct vm *vm, int vcpuid, struct vm_guest_paging *paging,
2604d665d229SNeel Natu     uint64_t gla, size_t len, int prot, struct vm_copyinfo *copyinfo,
26059c4d5478SNeel Natu     int num_copyinfo, int *fault)
2606d665d229SNeel Natu {
2607d665d229SNeel Natu 	int error, idx, nused;
2608d665d229SNeel Natu 	size_t n, off, remaining;
2609d665d229SNeel Natu 	void *hva, *cookie;
2610d665d229SNeel Natu 	uint64_t gpa;
2611d665d229SNeel Natu 
2612d665d229SNeel Natu 	bzero(copyinfo, sizeof(struct vm_copyinfo) * num_copyinfo);
2613d665d229SNeel Natu 
2614d665d229SNeel Natu 	nused = 0;
2615d665d229SNeel Natu 	remaining = len;
2616d665d229SNeel Natu 	while (remaining > 0) {
2617d665d229SNeel Natu 		KASSERT(nused < num_copyinfo, ("insufficient vm_copyinfo"));
26189c4d5478SNeel Natu 		error = vm_gla2gpa(vm, vcpuid, paging, gla, prot, &gpa, fault);
26199c4d5478SNeel Natu 		if (error || *fault)
2620d665d229SNeel Natu 			return (error);
2621d665d229SNeel Natu 		off = gpa & PAGE_MASK;
2622d665d229SNeel Natu 		n = min(remaining, PAGE_SIZE - off);
2623d665d229SNeel Natu 		copyinfo[nused].gpa = gpa;
2624d665d229SNeel Natu 		copyinfo[nused].len = n;
2625d665d229SNeel Natu 		remaining -= n;
2626d665d229SNeel Natu 		gla += n;
2627d665d229SNeel Natu 		nused++;
2628d665d229SNeel Natu 	}
2629d665d229SNeel Natu 
2630d665d229SNeel Natu 	for (idx = 0; idx < nused; idx++) {
26319b1aa8d6SNeel Natu 		hva = vm_gpa_hold(vm, vcpuid, copyinfo[idx].gpa,
26329b1aa8d6SNeel Natu 		    copyinfo[idx].len, prot, &cookie);
2633d665d229SNeel Natu 		if (hva == NULL)
2634d665d229SNeel Natu 			break;
2635d665d229SNeel Natu 		copyinfo[idx].hva = hva;
2636d665d229SNeel Natu 		copyinfo[idx].cookie = cookie;
2637d665d229SNeel Natu 	}
2638d665d229SNeel Natu 
2639d665d229SNeel Natu 	if (idx != nused) {
2640d665d229SNeel Natu 		vm_copy_teardown(vm, vcpuid, copyinfo, num_copyinfo);
26419c4d5478SNeel Natu 		return (EFAULT);
2642d665d229SNeel Natu 	} else {
26439c4d5478SNeel Natu 		*fault = 0;
2644d665d229SNeel Natu 		return (0);
2645d665d229SNeel Natu 	}
2646d665d229SNeel Natu }
2647d665d229SNeel Natu 
2648d665d229SNeel Natu void
2649d665d229SNeel Natu vm_copyin(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo, void *kaddr,
2650d665d229SNeel Natu     size_t len)
2651d665d229SNeel Natu {
2652d665d229SNeel Natu 	char *dst;
2653d665d229SNeel Natu 	int idx;
2654d665d229SNeel Natu 
2655d665d229SNeel Natu 	dst = kaddr;
2656d665d229SNeel Natu 	idx = 0;
2657d665d229SNeel Natu 	while (len > 0) {
2658d665d229SNeel Natu 		bcopy(copyinfo[idx].hva, dst, copyinfo[idx].len);
2659d665d229SNeel Natu 		len -= copyinfo[idx].len;
2660d665d229SNeel Natu 		dst += copyinfo[idx].len;
2661d665d229SNeel Natu 		idx++;
2662d665d229SNeel Natu 	}
2663d665d229SNeel Natu }
2664d665d229SNeel Natu 
2665d665d229SNeel Natu void
2666d665d229SNeel Natu vm_copyout(struct vm *vm, int vcpuid, const void *kaddr,
2667d665d229SNeel Natu     struct vm_copyinfo *copyinfo, size_t len)
2668d665d229SNeel Natu {
2669d665d229SNeel Natu 	const char *src;
2670d665d229SNeel Natu 	int idx;
2671d665d229SNeel Natu 
2672d665d229SNeel Natu 	src = kaddr;
2673d665d229SNeel Natu 	idx = 0;
2674d665d229SNeel Natu 	while (len > 0) {
2675d665d229SNeel Natu 		bcopy(src, copyinfo[idx].hva, copyinfo[idx].len);
2676d665d229SNeel Natu 		len -= copyinfo[idx].len;
2677d665d229SNeel Natu 		src += copyinfo[idx].len;
2678d665d229SNeel Natu 		idx++;
2679d665d229SNeel Natu 	}
2680d665d229SNeel Natu }
2681cf1d80d8SPeter Grehan 
2682cf1d80d8SPeter Grehan /*
2683cf1d80d8SPeter Grehan  * Return the amount of in-use and wired memory for the VM. Since
2684cf1d80d8SPeter Grehan  * these are global stats, only return the values with for vCPU 0
2685cf1d80d8SPeter Grehan  */
2686cf1d80d8SPeter Grehan VMM_STAT_DECLARE(VMM_MEM_RESIDENT);
2687cf1d80d8SPeter Grehan VMM_STAT_DECLARE(VMM_MEM_WIRED);
2688cf1d80d8SPeter Grehan 
2689cf1d80d8SPeter Grehan static void
2690cf1d80d8SPeter Grehan vm_get_rescnt(struct vm *vm, int vcpu, struct vmm_stat_type *stat)
2691cf1d80d8SPeter Grehan {
2692cf1d80d8SPeter Grehan 
2693cf1d80d8SPeter Grehan 	if (vcpu == 0) {
2694cf1d80d8SPeter Grehan 		vmm_stat_set(vm, vcpu, VMM_MEM_RESIDENT,
2695cf1d80d8SPeter Grehan 	       	    PAGE_SIZE * vmspace_resident_count(vm->vmspace));
2696cf1d80d8SPeter Grehan 	}
2697cf1d80d8SPeter Grehan }
2698cf1d80d8SPeter Grehan 
2699cf1d80d8SPeter Grehan static void
2700cf1d80d8SPeter Grehan vm_get_wiredcnt(struct vm *vm, int vcpu, struct vmm_stat_type *stat)
2701cf1d80d8SPeter Grehan {
2702cf1d80d8SPeter Grehan 
2703cf1d80d8SPeter Grehan 	if (vcpu == 0) {
2704cf1d80d8SPeter Grehan 		vmm_stat_set(vm, vcpu, VMM_MEM_WIRED,
2705cf1d80d8SPeter Grehan 	      	    PAGE_SIZE * pmap_wired_count(vmspace_pmap(vm->vmspace)));
2706cf1d80d8SPeter Grehan 	}
2707cf1d80d8SPeter Grehan }
2708cf1d80d8SPeter Grehan 
2709cf1d80d8SPeter Grehan VMM_STAT_FUNC(VMM_MEM_RESIDENT, "Resident memory", vm_get_rescnt);
2710cf1d80d8SPeter Grehan VMM_STAT_FUNC(VMM_MEM_WIRED, "Wired memory", vm_get_wiredcnt);
2711