2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2011 NetApp, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include "opt_bhyve_snapshot.h"
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/module.h>
40 #include <sys/sysctl.h>
41 #include <sys/malloc.h>
44 #include <sys/mutex.h>
46 #include <sys/rwlock.h>
47 #include <sys/sched.h>
49 #include <sys/vnode.h>
52 #include <vm/vm_object.h>
53 #include <vm/vm_page.h>
55 #include <vm/vm_map.h>
56 #include <vm/vm_extern.h>
57 #include <vm/vm_param.h>
58 #include <vm/vm_pager.h>
59 #include <vm/vm_kern.h>
60 #include <vm/vnode_pager.h>
61 #include <vm/swap_pager.h>
64 #include <machine/cpu.h>
65 #include <machine/pcb.h>
66 #include <machine/smp.h>
67 #include <machine/md_var.h>
69 #include <x86/apicreg.h>
71 #include <machine/vmm.h>
72 #include <machine/vmm_dev.h>
73 #include <machine/vmm_instruction_emul.h>
74 #include <machine/vmm_snapshot.h>
76 #include "vmm_ioport.h"
89 #include "vmm_lapic.h"
98 * (a) allocated when vcpu is created
99 * (i) initialized when vcpu is created and when it is reinitialized
100 * (o) initialized the first time the vcpu is created
101 * (x) initialized before use
104 struct mtx mtx; /* (o) protects 'state' and 'hostcpu' */
105 enum vcpu_state state; /* (o) vcpu state */
106 int hostcpu; /* (o) vcpu's host cpu */
107 int reqidle; /* (i) request vcpu to idle */
108 struct vlapic *vlapic; /* (i) APIC device model */
109 enum x2apic_state x2apic_state; /* (i) APIC mode */
110 uint64_t exitintinfo; /* (i) events pending at VM exit */
111 int nmi_pending; /* (i) NMI pending */
112 int extint_pending; /* (i) INTR pending */
113 int exception_pending; /* (i) exception pending */
114 int exc_vector; /* (x) exception collateral */
115 int exc_errcode_valid;
116 uint32_t exc_errcode;
117 struct savefpu *guestfpu; /* (a,i) guest fpu state */
118 uint64_t guest_xcr0; /* (i) guest %xcr0 register */
119 void *stats; /* (a,i) statistics */
120 struct vm_exit exitinfo; /* (x) exit reason and collateral */
121 uint64_t nextrip; /* (x) next instruction to execute */
122 uint64_t tsc_offset; /* (o) TSC offsetting */
125 #define vcpu_lock_initialized(v) mtx_initialized(&((v)->mtx))
126 #define vcpu_lock_init(v) mtx_init(&((v)->mtx), "vcpu lock", 0, MTX_SPIN)
127 #define vcpu_lock(v) mtx_lock_spin(&((v)->mtx))
128 #define vcpu_unlock(v) mtx_unlock_spin(&((v)->mtx))
129 #define vcpu_assert_locked(v) mtx_assert(&((v)->mtx), MA_OWNED)
134 struct vm_object *object;
136 #define VM_MAX_MEMSEGS 3
146 #define VM_MAX_MEMMAPS 8
150 * (o) initialized the first time the VM is created
151 * (i) initialized when VM is created and when it is reinitialized
152 * (x) initialized before use
155 void *cookie; /* (i) cpu-specific data */
156 void *iommu; /* (x) iommu-specific data */
157 struct vhpet *vhpet; /* (i) virtual HPET */
158 struct vioapic *vioapic; /* (i) virtual ioapic */
159 struct vatpic *vatpic; /* (i) virtual atpic */
160 struct vatpit *vatpit; /* (i) virtual atpit */
161 struct vpmtmr *vpmtmr; /* (i) virtual ACPI PM timer */
162 struct vrtc *vrtc; /* (o) virtual RTC */
163 volatile cpuset_t active_cpus; /* (i) active vcpus */
164 volatile cpuset_t debug_cpus; /* (i) vcpus stopped for debug */
165 int suspend; /* (i) stop VM execution */
166 volatile cpuset_t suspended_cpus; /* (i) suspended vcpus */
167 volatile cpuset_t halted_cpus; /* (x) cpus in a hard halt */
168 cpuset_t rendezvous_req_cpus; /* (x) rendezvous requested */
169 cpuset_t rendezvous_done_cpus; /* (x) rendezvous finished */
170 void *rendezvous_arg; /* (x) rendezvous func/arg */
171 vm_rendezvous_func_t rendezvous_func;
172 struct mtx rendezvous_mtx; /* (o) rendezvous lock */
173 struct mem_map mem_maps[VM_MAX_MEMMAPS]; /* (i) guest address space */
174 struct mem_seg mem_segs[VM_MAX_MEMSEGS]; /* (o) guest memory regions */
175 struct vmspace *vmspace; /* (o) guest's address space */
176 char name[VM_MAX_NAMELEN]; /* (o) virtual machine name */
177 struct vcpu vcpu[VM_MAXCPU]; /* (i) guest vcpus */
178 /* The following describe the vm cpu topology */
179 uint16_t sockets; /* (o) num of sockets */
180 uint16_t cores; /* (o) num of cores/socket */
181 uint16_t threads; /* (o) num of threads/core */
182 uint16_t maxcpus; /* (o) max pluggable cpus */
185 static int vmm_initialized;
187 static struct vmm_ops *ops;
188 #define VMM_INIT(num) (ops != NULL ? (*ops->init)(num) : 0)
189 #define VMM_CLEANUP() (ops != NULL ? (*ops->cleanup)() : 0)
190 #define VMM_RESUME() (ops != NULL ? (*ops->resume)() : 0)
192 #define VMINIT(vm, pmap) (ops != NULL ? (*ops->vminit)(vm, pmap): NULL)
193 #define VMRUN(vmi, vcpu, rip, pmap, evinfo) \
194 (ops != NULL ? (*ops->vmrun)(vmi, vcpu, rip, pmap, evinfo) : ENXIO)
195 #define VMCLEANUP(vmi) (ops != NULL ? (*ops->vmcleanup)(vmi) : NULL)
196 #define VMSPACE_ALLOC(min, max) \
197 (ops != NULL ? (*ops->vmspace_alloc)(min, max) : NULL)
198 #define VMSPACE_FREE(vmspace) \
199 (ops != NULL ? (*ops->vmspace_free)(vmspace) : ENXIO)
200 #define VMGETREG(vmi, vcpu, num, retval) \
201 (ops != NULL ? (*ops->vmgetreg)(vmi, vcpu, num, retval) : ENXIO)
202 #define VMSETREG(vmi, vcpu, num, val) \
203 (ops != NULL ? (*ops->vmsetreg)(vmi, vcpu, num, val) : ENXIO)
204 #define VMGETDESC(vmi, vcpu, num, desc) \
205 (ops != NULL ? (*ops->vmgetdesc)(vmi, vcpu, num, desc) : ENXIO)
206 #define VMSETDESC(vmi, vcpu, num, desc) \
207 (ops != NULL ? (*ops->vmsetdesc)(vmi, vcpu, num, desc) : ENXIO)
208 #define VMGETCAP(vmi, vcpu, num, retval) \
209 (ops != NULL ? (*ops->vmgetcap)(vmi, vcpu, num, retval) : ENXIO)
210 #define VMSETCAP(vmi, vcpu, num, val) \
211 (ops != NULL ? (*ops->vmsetcap)(vmi, vcpu, num, val) : ENXIO)
212 #define VLAPIC_INIT(vmi, vcpu) \
213 (ops != NULL ? (*ops->vlapic_init)(vmi, vcpu) : NULL)
214 #define VLAPIC_CLEANUP(vmi, vlapic) \
215 (ops != NULL ? (*ops->vlapic_cleanup)(vmi, vlapic) : NULL)
216 #ifdef BHYVE_SNAPSHOT
217 #define VM_SNAPSHOT_VMI(vmi, meta) \
218 (ops != NULL ? (*ops->vmsnapshot)(vmi, meta) : ENXIO)
219 #define VM_SNAPSHOT_VMCX(vmi, meta, vcpuid) \
220 (ops != NULL ? (*ops->vmcx_snapshot)(vmi, meta, vcpuid) : ENXIO)
221 #define VM_RESTORE_TSC(vmi, vcpuid, offset) \
222 (ops != NULL ? (*ops->vm_restore_tsc)(vmi, vcpuid, offset) : ENXIO)
225 #define fpu_start_emulating() load_cr0(rcr0() | CR0_TS)
226 #define fpu_stop_emulating() clts()
228 SDT_PROVIDER_DEFINE(vmm);
230 static MALLOC_DEFINE(M_VM, "vm", "vm");
233 static VMM_STAT(VCPU_TOTAL_RUNTIME, "vcpu total runtime");
235 SYSCTL_NODE(_hw, OID_AUTO, vmm, CTLFLAG_RW | CTLFLAG_MPSAFE, NULL,
239 * Halt the guest if all vcpus are executing a HLT instruction with
240 * interrupts disabled.
242 static int halt_detection_enabled = 1;
243 SYSCTL_INT(_hw_vmm, OID_AUTO, halt_detection, CTLFLAG_RDTUN,
244 &halt_detection_enabled, 0,
245 "Halt VM if all vcpus execute HLT with interrupts disabled");
247 static int vmm_ipinum;
248 SYSCTL_INT(_hw_vmm, OID_AUTO, ipinum, CTLFLAG_RD, &vmm_ipinum, 0,
249 "IPI vector used for vcpu notifications");
251 static int trace_guest_exceptions;
252 SYSCTL_INT(_hw_vmm, OID_AUTO, trace_guest_exceptions, CTLFLAG_RDTUN,
253 &trace_guest_exceptions, 0,
254 "Trap into hypervisor on all guest exceptions and reflect them back");
256 static void vm_free_memmap(struct vm *vm, int ident);
257 static bool sysmem_mapping(struct vm *vm, struct mem_map *mm);
258 static void vcpu_notify_event_locked(struct vcpu *vcpu, bool lapic_intr);
262 vcpu_state2str(enum vcpu_state state)
281 vcpu_cleanup(struct vm *vm, int i, bool destroy)
283 struct vcpu *vcpu = &vm->vcpu[i];
285 VLAPIC_CLEANUP(vm->cookie, vcpu->vlapic);
287 vmm_stat_free(vcpu->stats);
288 fpu_save_area_free(vcpu->guestfpu);
293 vcpu_init(struct vm *vm, int vcpu_id, bool create)
297 KASSERT(vcpu_id >= 0 && vcpu_id < vm->maxcpus,
298 ("vcpu_init: invalid vcpu %d", vcpu_id));
300 vcpu = &vm->vcpu[vcpu_id];
303 KASSERT(!vcpu_lock_initialized(vcpu), ("vcpu %d already "
304 "initialized", vcpu_id));
305 vcpu_lock_init(vcpu);
306 vcpu->state = VCPU_IDLE;
307 vcpu->hostcpu = NOCPU;
308 vcpu->guestfpu = fpu_save_area_alloc();
309 vcpu->stats = vmm_stat_alloc();
310 vcpu->tsc_offset = 0;
313 vcpu->vlapic = VLAPIC_INIT(vm->cookie, vcpu_id);
314 vm_set_x2apic_state(vm, vcpu_id, X2APIC_DISABLED);
316 vcpu->exitintinfo = 0;
317 vcpu->nmi_pending = 0;
318 vcpu->extint_pending = 0;
319 vcpu->exception_pending = 0;
320 vcpu->guest_xcr0 = XFEATURE_ENABLED_X87;
321 fpu_save_area_reset(vcpu->guestfpu);
322 vmm_stat_init(vcpu->stats);
326 vcpu_trace_exceptions(struct vm *vm, int vcpuid)
329 return (trace_guest_exceptions);
333 vm_exitinfo(struct vm *vm, int cpuid)
337 if (cpuid < 0 || cpuid >= vm->maxcpus)
338 panic("vm_exitinfo: invalid cpuid %d", cpuid);
340 vcpu = &vm->vcpu[cpuid];
342 return (&vcpu->exitinfo);
356 vmm_host_state_init();
358 vmm_ipinum = lapic_ipi_alloc(pti ? &IDTVEC(justreturn1_pti) :
359 &IDTVEC(justreturn));
361 vmm_ipinum = IPI_AST;
363 error = vmm_mem_init();
368 ops = &vmm_ops_intel;
369 else if (vmm_is_svm())
374 vmm_resume_p = vmm_resume;
376 return (VMM_INIT(vmm_ipinum));
380 vmm_handler(module_t mod, int what, void *arg)
392 error = vmmdev_cleanup();
396 if (vmm_ipinum != IPI_AST)
397 lapic_ipi_free(vmm_ipinum);
398 error = VMM_CLEANUP();
400 * Something bad happened - prevent new
401 * VMs from being created
414 static moduledata_t vmm_kmod = {
421 * vmm initialization has the following dependencies:
423 * - VT-x initialization requires smp_rendezvous() and therefore must happen
424 * after SMP is fully functional (after SI_SUB_SMP).
426 DECLARE_MODULE(vmm, vmm_kmod, SI_SUB_SMP + 1, SI_ORDER_ANY);
427 MODULE_VERSION(vmm, 1);
430 vm_init(struct vm *vm, bool create)
434 vm->cookie = VMINIT(vm, vmspace_pmap(vm->vmspace));
436 vm->vioapic = vioapic_init(vm);
437 vm->vhpet = vhpet_init(vm);
438 vm->vatpic = vatpic_init(vm);
439 vm->vatpit = vatpit_init(vm);
440 vm->vpmtmr = vpmtmr_init(vm);
442 vm->vrtc = vrtc_init(vm);
444 CPU_ZERO(&vm->active_cpus);
445 CPU_ZERO(&vm->debug_cpus);
448 CPU_ZERO(&vm->suspended_cpus);
450 for (i = 0; i < vm->maxcpus; i++)
451 vcpu_init(vm, i, create);
455 * The default CPU topology is a single thread per package.
457 u_int cores_per_package = 1;
458 u_int threads_per_core = 1;
461 vm_create(const char *name, struct vm **retvm)
464 struct vmspace *vmspace;
467 * If vmm.ko could not be successfully initialized then don't attempt
468 * to create the virtual machine.
470 if (!vmm_initialized)
473 if (name == NULL || strlen(name) >= VM_MAX_NAMELEN)
476 vmspace = VMSPACE_ALLOC(0, VM_MAXUSER_ADDRESS);
480 vm = malloc(sizeof(struct vm), M_VM, M_WAITOK | M_ZERO);
481 strcpy(vm->name, name);
482 vm->vmspace = vmspace;
483 mtx_init(&vm->rendezvous_mtx, "vm rendezvous lock", 0, MTX_DEF);
486 vm->cores = cores_per_package; /* XXX backwards compatibility */
487 vm->threads = threads_per_core; /* XXX backwards compatibility */
488 vm->maxcpus = VM_MAXCPU; /* XXX temp to keep code working */
497 vm_get_topology(struct vm *vm, uint16_t *sockets, uint16_t *cores,
498 uint16_t *threads, uint16_t *maxcpus)
500 *sockets = vm->sockets;
502 *threads = vm->threads;
503 *maxcpus = vm->maxcpus;
507 vm_get_maxcpus(struct vm *vm)
509 return (vm->maxcpus);
513 vm_set_topology(struct vm *vm, uint16_t sockets, uint16_t cores,
514 uint16_t threads, uint16_t maxcpus)
517 return (EINVAL); /* XXX remove when supported */
518 if ((sockets * cores * threads) > vm->maxcpus)
520 /* XXX need to check sockets * cores * threads == vCPU, how? */
521 vm->sockets = sockets;
523 vm->threads = threads;
524 vm->maxcpus = VM_MAXCPU; /* XXX temp to keep code working */
529 vm_cleanup(struct vm *vm, bool destroy)
534 ppt_unassign_all(vm);
536 if (vm->iommu != NULL)
537 iommu_destroy_domain(vm->iommu);
540 vrtc_cleanup(vm->vrtc);
542 vrtc_reset(vm->vrtc);
543 vpmtmr_cleanup(vm->vpmtmr);
544 vatpit_cleanup(vm->vatpit);
545 vhpet_cleanup(vm->vhpet);
546 vatpic_cleanup(vm->vatpic);
547 vioapic_cleanup(vm->vioapic);
549 for (i = 0; i < vm->maxcpus; i++)
550 vcpu_cleanup(vm, i, destroy);
552 VMCLEANUP(vm->cookie);
555 * System memory is removed from the guest address space only when
556 * the VM is destroyed. This is because the mapping remains the same
559 * Device memory can be relocated by the guest (e.g. using PCI BARs)
560 * so those mappings are removed on a VM reset.
562 for (i = 0; i < VM_MAX_MEMMAPS; i++) {
563 mm = &vm->mem_maps[i];
564 if (destroy || !sysmem_mapping(vm, mm))
565 vm_free_memmap(vm, i);
569 for (i = 0; i < VM_MAX_MEMSEGS; i++)
570 vm_free_memseg(vm, i);
572 VMSPACE_FREE(vm->vmspace);
578 vm_destroy(struct vm *vm)
580 vm_cleanup(vm, true);
585 vm_reinit(struct vm *vm)
590 * A virtual machine can be reset only if all vcpus are suspended.
592 if (CPU_CMP(&vm->suspended_cpus, &vm->active_cpus) == 0) {
593 vm_cleanup(vm, false);
604 vm_name(struct vm *vm)
610 vm_map_mmio(struct vm *vm, vm_paddr_t gpa, size_t len, vm_paddr_t hpa)
614 if ((obj = vmm_mmio_alloc(vm->vmspace, gpa, len, hpa)) == NULL)
621 vm_unmap_mmio(struct vm *vm, vm_paddr_t gpa, size_t len)
624 vmm_mmio_free(vm->vmspace, gpa, len);
629 * Return 'true' if 'gpa' is allocated in the guest address space.
631 * This function is called in the context of a running vcpu which acts as
632 * an implicit lock on 'vm->mem_maps[]'.
635 vm_mem_allocated(struct vm *vm, int vcpuid, vm_paddr_t gpa)
642 state = vcpu_get_state(vm, vcpuid, &hostcpu);
643 KASSERT(state == VCPU_RUNNING && hostcpu == curcpu,
644 ("%s: invalid vcpu state %d/%d", __func__, state, hostcpu));
647 for (i = 0; i < VM_MAX_MEMMAPS; i++) {
648 mm = &vm->mem_maps[i];
649 if (mm->len != 0 && gpa >= mm->gpa && gpa < mm->gpa + mm->len)
650 return (true); /* 'gpa' is sysmem or devmem */
653 if (ppt_is_mmio(vm, gpa))
654 return (true); /* 'gpa' is pci passthru mmio */
660 vm_alloc_memseg(struct vm *vm, int ident, size_t len, bool sysmem)
665 if (ident < 0 || ident >= VM_MAX_MEMSEGS)
668 if (len == 0 || (len & PAGE_MASK))
671 seg = &vm->mem_segs[ident];
672 if (seg->object != NULL) {
673 if (seg->len == len && seg->sysmem == sysmem)
679 obj = vm_object_allocate(OBJT_DEFAULT, len >> PAGE_SHIFT);
685 seg->sysmem = sysmem;
690 vm_get_memseg(struct vm *vm, int ident, size_t *len, bool *sysmem,
695 if (ident < 0 || ident >= VM_MAX_MEMSEGS)
698 seg = &vm->mem_segs[ident];
702 *sysmem = seg->sysmem;
704 *objptr = seg->object;
709 vm_free_memseg(struct vm *vm, int ident)
713 KASSERT(ident >= 0 && ident < VM_MAX_MEMSEGS,
714 ("%s: invalid memseg ident %d", __func__, ident));
716 seg = &vm->mem_segs[ident];
717 if (seg->object != NULL) {
718 vm_object_deallocate(seg->object);
719 bzero(seg, sizeof(struct mem_seg));
724 vm_mmap_memseg(struct vm *vm, vm_paddr_t gpa, int segid, vm_ooffset_t first,
725 size_t len, int prot, int flags)
728 struct mem_map *m, *map;
732 if (prot == 0 || (prot & ~(VM_PROT_ALL)) != 0)
735 if (flags & ~VM_MEMMAP_F_WIRED)
738 if (segid < 0 || segid >= VM_MAX_MEMSEGS)
741 seg = &vm->mem_segs[segid];
742 if (seg->object == NULL)
746 if (first < 0 || first >= last || last > seg->len)
749 if ((gpa | first | last) & PAGE_MASK)
753 for (i = 0; i < VM_MAX_MEMMAPS; i++) {
754 m = &vm->mem_maps[i];
764 error = vm_map_find(&vm->vmspace->vm_map, seg->object, first, &gpa,
765 len, 0, VMFS_NO_SPACE, prot, prot, 0);
766 if (error != KERN_SUCCESS)
769 vm_object_reference(seg->object);
771 if (flags & VM_MEMMAP_F_WIRED) {
772 error = vm_map_wire(&vm->vmspace->vm_map, gpa, gpa + len,
773 VM_MAP_WIRE_USER | VM_MAP_WIRE_NOHOLES);
774 if (error != KERN_SUCCESS) {
775 vm_map_remove(&vm->vmspace->vm_map, gpa, gpa + len);
776 return (error == KERN_RESOURCE_SHORTAGE ? ENOMEM :
791 vm_mmap_getnext(struct vm *vm, vm_paddr_t *gpa, int *segid,
792 vm_ooffset_t *segoff, size_t *len, int *prot, int *flags)
794 struct mem_map *mm, *mmnext;
798 for (i = 0; i < VM_MAX_MEMMAPS; i++) {
799 mm = &vm->mem_maps[i];
800 if (mm->len == 0 || mm->gpa < *gpa)
802 if (mmnext == NULL || mm->gpa < mmnext->gpa)
806 if (mmnext != NULL) {
809 *segid = mmnext->segid;
811 *segoff = mmnext->segoff;
815 *prot = mmnext->prot;
817 *flags = mmnext->flags;
825 vm_free_memmap(struct vm *vm, int ident)
830 mm = &vm->mem_maps[ident];
832 error = vm_map_remove(&vm->vmspace->vm_map, mm->gpa,
834 KASSERT(error == KERN_SUCCESS, ("%s: vm_map_remove error %d",
836 bzero(mm, sizeof(struct mem_map));
841 sysmem_mapping(struct vm *vm, struct mem_map *mm)
844 if (mm->len != 0 && vm->mem_segs[mm->segid].sysmem)
851 vmm_sysmem_maxaddr(struct vm *vm)
858 for (i = 0; i < VM_MAX_MEMMAPS; i++) {
859 mm = &vm->mem_maps[i];
860 if (sysmem_mapping(vm, mm)) {
861 if (maxaddr < mm->gpa + mm->len)
862 maxaddr = mm->gpa + mm->len;
869 vm_iommu_modify(struct vm *vm, bool map)
874 void *vp, *cookie, *host_domain;
877 host_domain = iommu_host_domain();
879 for (i = 0; i < VM_MAX_MEMMAPS; i++) {
880 mm = &vm->mem_maps[i];
881 if (!sysmem_mapping(vm, mm))
885 KASSERT((mm->flags & VM_MEMMAP_F_IOMMU) == 0,
886 ("iommu map found invalid memmap %#lx/%#lx/%#x",
887 mm->gpa, mm->len, mm->flags));
888 if ((mm->flags & VM_MEMMAP_F_WIRED) == 0)
890 mm->flags |= VM_MEMMAP_F_IOMMU;
892 if ((mm->flags & VM_MEMMAP_F_IOMMU) == 0)
894 mm->flags &= ~VM_MEMMAP_F_IOMMU;
895 KASSERT((mm->flags & VM_MEMMAP_F_WIRED) != 0,
896 ("iommu unmap found invalid memmap %#lx/%#lx/%#x",
897 mm->gpa, mm->len, mm->flags));
901 while (gpa < mm->gpa + mm->len) {
902 vp = vm_gpa_hold(vm, -1, gpa, PAGE_SIZE, VM_PROT_WRITE,
904 KASSERT(vp != NULL, ("vm(%s) could not map gpa %#lx",
907 vm_gpa_release(cookie);
909 hpa = DMAP_TO_PHYS((uintptr_t)vp);
911 iommu_create_mapping(vm->iommu, gpa, hpa, sz);
912 iommu_remove_mapping(host_domain, hpa, sz);
914 iommu_remove_mapping(vm->iommu, gpa, sz);
915 iommu_create_mapping(host_domain, hpa, hpa, sz);
923 * Invalidate the cached translations associated with the domain
924 * from which pages were removed.
927 iommu_invalidate_tlb(host_domain);
929 iommu_invalidate_tlb(vm->iommu);
932 #define vm_iommu_unmap(vm) vm_iommu_modify((vm), false)
933 #define vm_iommu_map(vm) vm_iommu_modify((vm), true)
936 vm_unassign_pptdev(struct vm *vm, int bus, int slot, int func)
940 error = ppt_unassign_device(vm, bus, slot, func);
944 if (ppt_assigned_devices(vm) == 0)
951 vm_assign_pptdev(struct vm *vm, int bus, int slot, int func)
956 /* Set up the IOMMU to do the 'gpa' to 'hpa' translation */
957 if (ppt_assigned_devices(vm) == 0) {
958 KASSERT(vm->iommu == NULL,
959 ("vm_assign_pptdev: iommu must be NULL"));
960 maxaddr = vmm_sysmem_maxaddr(vm);
961 vm->iommu = iommu_create_domain(maxaddr);
962 if (vm->iommu == NULL)
967 error = ppt_assign_device(vm, bus, slot, func);
972 vm_gpa_hold(struct vm *vm, int vcpuid, vm_paddr_t gpa, size_t len, int reqprot,
975 int i, count, pageoff;
980 * All vcpus are frozen by ioctls that modify the memory map
981 * (e.g. VM_MMAP_MEMSEG). Therefore 'vm->memmap[]' stability is
982 * guaranteed if at least one vcpu is in the VCPU_FROZEN state.
985 KASSERT(vcpuid >= -1 && vcpuid < vm->maxcpus, ("%s: invalid vcpuid %d",
987 for (i = 0; i < vm->maxcpus; i++) {
988 if (vcpuid != -1 && vcpuid != i)
990 state = vcpu_get_state(vm, i, NULL);
991 KASSERT(state == VCPU_FROZEN, ("%s: invalid vcpu state %d",
995 pageoff = gpa & PAGE_MASK;
996 if (len > PAGE_SIZE - pageoff)
997 panic("vm_gpa_hold: invalid gpa/len: 0x%016lx/%lu", gpa, len);
1000 for (i = 0; i < VM_MAX_MEMMAPS; i++) {
1001 mm = &vm->mem_maps[i];
1002 if (gpa >= mm->gpa && gpa < mm->gpa + mm->len) {
1003 count = vm_fault_quick_hold_pages(&vm->vmspace->vm_map,
1004 trunc_page(gpa), PAGE_SIZE, reqprot, &m, 1);
1011 return ((void *)(PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m)) + pageoff));
1019 vm_gpa_release(void *cookie)
1021 vm_page_t m = cookie;
1023 vm_page_unwire(m, PQ_ACTIVE);
1027 vm_get_register(struct vm *vm, int vcpu, int reg, uint64_t *retval)
1030 if (vcpu < 0 || vcpu >= vm->maxcpus)
1033 if (reg >= VM_REG_LAST)
1036 return (VMGETREG(vm->cookie, vcpu, reg, retval));
1040 vm_set_register(struct vm *vm, int vcpuid, int reg, uint64_t val)
1045 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
1048 if (reg >= VM_REG_LAST)
1051 error = VMSETREG(vm->cookie, vcpuid, reg, val);
1052 if (error || reg != VM_REG_GUEST_RIP)
1055 /* Set 'nextrip' to match the value of %rip */
1056 VCPU_CTR1(vm, vcpuid, "Setting nextrip to %#lx", val);
1057 vcpu = &vm->vcpu[vcpuid];
1058 vcpu->nextrip = val;
1063 is_descriptor_table(int reg)
1067 case VM_REG_GUEST_IDTR:
1068 case VM_REG_GUEST_GDTR:
1076 is_segment_register(int reg)
1080 case VM_REG_GUEST_ES:
1081 case VM_REG_GUEST_CS:
1082 case VM_REG_GUEST_SS:
1083 case VM_REG_GUEST_DS:
1084 case VM_REG_GUEST_FS:
1085 case VM_REG_GUEST_GS:
1086 case VM_REG_GUEST_TR:
1087 case VM_REG_GUEST_LDTR:
1095 vm_get_seg_desc(struct vm *vm, int vcpu, int reg,
1096 struct seg_desc *desc)
1099 if (vcpu < 0 || vcpu >= vm->maxcpus)
1102 if (!is_segment_register(reg) && !is_descriptor_table(reg))
1105 return (VMGETDESC(vm->cookie, vcpu, reg, desc));
1109 vm_set_seg_desc(struct vm *vm, int vcpu, int reg,
1110 struct seg_desc *desc)
1112 if (vcpu < 0 || vcpu >= vm->maxcpus)
1115 if (!is_segment_register(reg) && !is_descriptor_table(reg))
1118 return (VMSETDESC(vm->cookie, vcpu, reg, desc));
1122 restore_guest_fpustate(struct vcpu *vcpu)
1125 /* flush host state to the pcb */
1128 /* restore guest FPU state */
1129 fpu_stop_emulating();
1130 fpurestore(vcpu->guestfpu);
1132 /* restore guest XCR0 if XSAVE is enabled in the host */
1133 if (rcr4() & CR4_XSAVE)
1134 load_xcr(0, vcpu->guest_xcr0);
1137 * The FPU is now "dirty" with the guest's state so turn on emulation
1138 * to trap any access to the FPU by the host.
1140 fpu_start_emulating();
1144 save_guest_fpustate(struct vcpu *vcpu)
1147 if ((rcr0() & CR0_TS) == 0)
1148 panic("fpu emulation not enabled in host!");
1150 /* save guest XCR0 and restore host XCR0 */
1151 if (rcr4() & CR4_XSAVE) {
1152 vcpu->guest_xcr0 = rxcr(0);
1153 load_xcr(0, vmm_get_host_xcr0());
1156 /* save guest FPU state */
1157 fpu_stop_emulating();
1158 fpusave(vcpu->guestfpu);
1159 fpu_start_emulating();
1162 static VMM_STAT(VCPU_IDLE_TICKS, "number of ticks vcpu was idle");
1165 vcpu_set_state_locked(struct vm *vm, int vcpuid, enum vcpu_state newstate,
1171 vcpu = &vm->vcpu[vcpuid];
1172 vcpu_assert_locked(vcpu);
1175 * State transitions from the vmmdev_ioctl() must always begin from
1176 * the VCPU_IDLE state. This guarantees that there is only a single
1177 * ioctl() operating on a vcpu at any point.
1180 while (vcpu->state != VCPU_IDLE) {
1182 vcpu_notify_event_locked(vcpu, false);
1183 VCPU_CTR1(vm, vcpuid, "vcpu state change from %s to "
1184 "idle requested", vcpu_state2str(vcpu->state));
1185 msleep_spin(&vcpu->state, &vcpu->mtx, "vmstat", hz);
1188 KASSERT(vcpu->state != VCPU_IDLE, ("invalid transition from "
1189 "vcpu idle state"));
1192 if (vcpu->state == VCPU_RUNNING) {
1193 KASSERT(vcpu->hostcpu == curcpu, ("curcpu %d and hostcpu %d "
1194 "mismatch for running vcpu", curcpu, vcpu->hostcpu));
1196 KASSERT(vcpu->hostcpu == NOCPU, ("Invalid hostcpu %d for a "
1197 "vcpu that is not running", vcpu->hostcpu));
1201 * The following state transitions are allowed:
1202 * IDLE -> FROZEN -> IDLE
1203 * FROZEN -> RUNNING -> FROZEN
1204 * FROZEN -> SLEEPING -> FROZEN
1206 switch (vcpu->state) {
1210 error = (newstate != VCPU_FROZEN);
1213 error = (newstate == VCPU_FROZEN);
1223 VCPU_CTR2(vm, vcpuid, "vcpu state changed from %s to %s",
1224 vcpu_state2str(vcpu->state), vcpu_state2str(newstate));
1226 vcpu->state = newstate;
1227 if (newstate == VCPU_RUNNING)
1228 vcpu->hostcpu = curcpu;
1230 vcpu->hostcpu = NOCPU;
1232 if (newstate == VCPU_IDLE)
1233 wakeup(&vcpu->state);
1239 vcpu_require_state(struct vm *vm, int vcpuid, enum vcpu_state newstate)
1243 if ((error = vcpu_set_state(vm, vcpuid, newstate, false)) != 0)
1244 panic("Error %d setting state to %d\n", error, newstate);
1248 vcpu_require_state_locked(struct vm *vm, int vcpuid, enum vcpu_state newstate)
1252 if ((error = vcpu_set_state_locked(vm, vcpuid, newstate, false)) != 0)
1253 panic("Error %d setting state to %d", error, newstate);
1256 #define RENDEZVOUS_CTR0(vm, vcpuid, fmt) \
1259 VCPU_CTR0(vm, vcpuid, fmt); \
1265 vm_handle_rendezvous(struct vm *vm, int vcpuid)
1270 KASSERT(vcpuid == -1 || (vcpuid >= 0 && vcpuid < vm->maxcpus),
1271 ("vm_handle_rendezvous: invalid vcpuid %d", vcpuid));
1275 mtx_lock(&vm->rendezvous_mtx);
1276 while (vm->rendezvous_func != NULL) {
1277 /* 'rendezvous_req_cpus' must be a subset of 'active_cpus' */
1278 CPU_AND(&vm->rendezvous_req_cpus, &vm->active_cpus);
1281 CPU_ISSET(vcpuid, &vm->rendezvous_req_cpus) &&
1282 !CPU_ISSET(vcpuid, &vm->rendezvous_done_cpus)) {
1283 VCPU_CTR0(vm, vcpuid, "Calling rendezvous func");
1284 (*vm->rendezvous_func)(vm, vcpuid, vm->rendezvous_arg);
1285 CPU_SET(vcpuid, &vm->rendezvous_done_cpus);
1287 if (CPU_CMP(&vm->rendezvous_req_cpus,
1288 &vm->rendezvous_done_cpus) == 0) {
1289 VCPU_CTR0(vm, vcpuid, "Rendezvous completed");
1290 vm->rendezvous_func = NULL;
1291 wakeup(&vm->rendezvous_func);
1294 RENDEZVOUS_CTR0(vm, vcpuid, "Wait for rendezvous completion");
1295 mtx_sleep(&vm->rendezvous_func, &vm->rendezvous_mtx, 0,
1297 if ((td->td_flags & TDF_NEEDSUSPCHK) != 0) {
1298 mtx_unlock(&vm->rendezvous_mtx);
1299 error = thread_check_susp(td, true);
1302 mtx_lock(&vm->rendezvous_mtx);
1305 mtx_unlock(&vm->rendezvous_mtx);
1310 * Emulate a guest 'hlt' by sleeping until the vcpu is ready to run.
1313 vm_handle_hlt(struct vm *vm, int vcpuid, bool intr_disabled, bool *retu)
1318 int error, t, vcpu_halted, vm_halted;
1320 KASSERT(!CPU_ISSET(vcpuid, &vm->halted_cpus), ("vcpu already halted"));
1322 vcpu = &vm->vcpu[vcpuid];
1331 * Do a final check for pending NMI or interrupts before
1332 * really putting this thread to sleep. Also check for
1333 * software events that would cause this vcpu to wakeup.
1335 * These interrupts/events could have happened after the
1336 * vcpu returned from VMRUN() and before it acquired the
1339 if (vm->rendezvous_func != NULL || vm->suspend || vcpu->reqidle)
1341 if (vm_nmi_pending(vm, vcpuid))
1343 if (!intr_disabled) {
1344 if (vm_extint_pending(vm, vcpuid) ||
1345 vlapic_pending_intr(vcpu->vlapic, NULL)) {
1350 /* Don't go to sleep if the vcpu thread needs to yield */
1351 if (vcpu_should_yield(vm, vcpuid))
1354 if (vcpu_debugged(vm, vcpuid))
1358 * Some Linux guests implement "halt" by having all vcpus
1359 * execute HLT with interrupts disabled. 'halted_cpus' keeps
1360 * track of the vcpus that have entered this state. When all
1361 * vcpus enter the halted state the virtual machine is halted.
1363 if (intr_disabled) {
1365 VCPU_CTR0(vm, vcpuid, "Halted");
1366 if (!vcpu_halted && halt_detection_enabled) {
1368 CPU_SET_ATOMIC(vcpuid, &vm->halted_cpus);
1370 if (CPU_CMP(&vm->halted_cpus, &vm->active_cpus) == 0) {
1379 vcpu_require_state_locked(vm, vcpuid, VCPU_SLEEPING);
1381 * XXX msleep_spin() cannot be interrupted by signals so
1382 * wake up periodically to check pending signals.
1384 msleep_spin(vcpu, &vcpu->mtx, wmesg, hz);
1385 vcpu_require_state_locked(vm, vcpuid, VCPU_FROZEN);
1386 vmm_stat_incr(vm, vcpuid, VCPU_IDLE_TICKS, ticks - t);
1387 if ((td->td_flags & TDF_NEEDSUSPCHK) != 0) {
1389 error = thread_check_susp(td, false);
1397 CPU_CLR_ATOMIC(vcpuid, &vm->halted_cpus);
1402 vm_suspend(vm, VM_SUSPEND_HALT);
1408 vm_handle_paging(struct vm *vm, int vcpuid, bool *retu)
1413 struct vm_exit *vme;
1415 vcpu = &vm->vcpu[vcpuid];
1416 vme = &vcpu->exitinfo;
1418 KASSERT(vme->inst_length == 0, ("%s: invalid inst_length %d",
1419 __func__, vme->inst_length));
1421 ftype = vme->u.paging.fault_type;
1422 KASSERT(ftype == VM_PROT_READ ||
1423 ftype == VM_PROT_WRITE || ftype == VM_PROT_EXECUTE,
1424 ("vm_handle_paging: invalid fault_type %d", ftype));
1426 if (ftype == VM_PROT_READ || ftype == VM_PROT_WRITE) {
1427 rv = pmap_emulate_accessed_dirty(vmspace_pmap(vm->vmspace),
1428 vme->u.paging.gpa, ftype);
1430 VCPU_CTR2(vm, vcpuid, "%s bit emulation for gpa %#lx",
1431 ftype == VM_PROT_READ ? "accessed" : "dirty",
1437 map = &vm->vmspace->vm_map;
1438 rv = vm_fault(map, vme->u.paging.gpa, ftype, VM_FAULT_NORMAL, NULL);
1440 VCPU_CTR3(vm, vcpuid, "vm_handle_paging rv = %d, gpa = %#lx, "
1441 "ftype = %d", rv, vme->u.paging.gpa, ftype);
1443 if (rv != KERN_SUCCESS)
1450 vm_handle_inst_emul(struct vm *vm, int vcpuid, bool *retu)
1454 struct vm_exit *vme;
1455 uint64_t gla, gpa, cs_base;
1456 struct vm_guest_paging *paging;
1457 mem_region_read_t mread;
1458 mem_region_write_t mwrite;
1459 enum vm_cpu_mode cpu_mode;
1460 int cs_d, error, fault;
1462 vcpu = &vm->vcpu[vcpuid];
1463 vme = &vcpu->exitinfo;
1465 KASSERT(vme->inst_length == 0, ("%s: invalid inst_length %d",
1466 __func__, vme->inst_length));
1468 gla = vme->u.inst_emul.gla;
1469 gpa = vme->u.inst_emul.gpa;
1470 cs_base = vme->u.inst_emul.cs_base;
1471 cs_d = vme->u.inst_emul.cs_d;
1472 vie = &vme->u.inst_emul.vie;
1473 paging = &vme->u.inst_emul.paging;
1474 cpu_mode = paging->cpu_mode;
1476 VCPU_CTR1(vm, vcpuid, "inst_emul fault accessing gpa %#lx", gpa);
1478 /* Fetch, decode and emulate the faulting instruction */
1479 if (vie->num_valid == 0) {
1480 error = vmm_fetch_instruction(vm, vcpuid, paging, vme->rip +
1481 cs_base, VIE_INST_SIZE, vie, &fault);
1484 * The instruction bytes have already been copied into 'vie'
1491 if (vmm_decode_instruction(vm, vcpuid, gla, cpu_mode, cs_d, vie) != 0) {
1492 VCPU_CTR1(vm, vcpuid, "Error decoding instruction at %#lx",
1493 vme->rip + cs_base);
1494 *retu = true; /* dump instruction bytes in userspace */
1499 * Update 'nextrip' based on the length of the emulated instruction.
1501 vme->inst_length = vie->num_processed;
1502 vcpu->nextrip += vie->num_processed;
1503 VCPU_CTR1(vm, vcpuid, "nextrip updated to %#lx after instruction "
1504 "decoding", vcpu->nextrip);
1506 /* return to userland unless this is an in-kernel emulated device */
1507 if (gpa >= DEFAULT_APIC_BASE && gpa < DEFAULT_APIC_BASE + PAGE_SIZE) {
1508 mread = lapic_mmio_read;
1509 mwrite = lapic_mmio_write;
1510 } else if (gpa >= VIOAPIC_BASE && gpa < VIOAPIC_BASE + VIOAPIC_SIZE) {
1511 mread = vioapic_mmio_read;
1512 mwrite = vioapic_mmio_write;
1513 } else if (gpa >= VHPET_BASE && gpa < VHPET_BASE + VHPET_SIZE) {
1514 mread = vhpet_mmio_read;
1515 mwrite = vhpet_mmio_write;
1521 error = vmm_emulate_instruction(vm, vcpuid, gpa, vie, paging,
1522 mread, mwrite, retu);
1528 vm_handle_suspend(struct vm *vm, int vcpuid, bool *retu)
1535 vcpu = &vm->vcpu[vcpuid];
1538 CPU_SET_ATOMIC(vcpuid, &vm->suspended_cpus);
1541 * Wait until all 'active_cpus' have suspended themselves.
1543 * Since a VM may be suspended at any time including when one or
1544 * more vcpus are doing a rendezvous we need to call the rendezvous
1545 * handler while we are waiting to prevent a deadlock.
1548 while (error == 0) {
1549 if (CPU_CMP(&vm->suspended_cpus, &vm->active_cpus) == 0) {
1550 VCPU_CTR0(vm, vcpuid, "All vcpus suspended");
1554 if (vm->rendezvous_func == NULL) {
1555 VCPU_CTR0(vm, vcpuid, "Sleeping during suspend");
1556 vcpu_require_state_locked(vm, vcpuid, VCPU_SLEEPING);
1557 msleep_spin(vcpu, &vcpu->mtx, "vmsusp", hz);
1558 vcpu_require_state_locked(vm, vcpuid, VCPU_FROZEN);
1559 if ((td->td_flags & TDF_NEEDSUSPCHK) != 0) {
1561 error = thread_check_susp(td, false);
1565 VCPU_CTR0(vm, vcpuid, "Rendezvous during suspend");
1567 error = vm_handle_rendezvous(vm, vcpuid);
1574 * Wakeup the other sleeping vcpus and return to userspace.
1576 for (i = 0; i < vm->maxcpus; i++) {
1577 if (CPU_ISSET(i, &vm->suspended_cpus)) {
1578 vcpu_notify_event(vm, i, false);
1587 vm_handle_reqidle(struct vm *vm, int vcpuid, bool *retu)
1589 struct vcpu *vcpu = &vm->vcpu[vcpuid];
1592 KASSERT(vcpu->reqidle, ("invalid vcpu reqidle %d", vcpu->reqidle));
1600 vm_suspend(struct vm *vm, enum vm_suspend_how how)
1604 if (how <= VM_SUSPEND_NONE || how >= VM_SUSPEND_LAST)
1607 if (atomic_cmpset_int(&vm->suspend, 0, how) == 0) {
1608 VM_CTR2(vm, "virtual machine already suspended %d/%d",
1613 VM_CTR1(vm, "virtual machine successfully suspended %d", how);
1616 * Notify all active vcpus that they are now suspended.
1618 for (i = 0; i < vm->maxcpus; i++) {
1619 if (CPU_ISSET(i, &vm->active_cpus))
1620 vcpu_notify_event(vm, i, false);
1627 vm_exit_suspended(struct vm *vm, int vcpuid, uint64_t rip)
1629 struct vm_exit *vmexit;
1631 KASSERT(vm->suspend > VM_SUSPEND_NONE && vm->suspend < VM_SUSPEND_LAST,
1632 ("vm_exit_suspended: invalid suspend type %d", vm->suspend));
1634 vmexit = vm_exitinfo(vm, vcpuid);
1636 vmexit->inst_length = 0;
1637 vmexit->exitcode = VM_EXITCODE_SUSPENDED;
1638 vmexit->u.suspended.how = vm->suspend;
1642 vm_exit_debug(struct vm *vm, int vcpuid, uint64_t rip)
1644 struct vm_exit *vmexit;
1646 vmexit = vm_exitinfo(vm, vcpuid);
1648 vmexit->inst_length = 0;
1649 vmexit->exitcode = VM_EXITCODE_DEBUG;
1653 vm_exit_rendezvous(struct vm *vm, int vcpuid, uint64_t rip)
1655 struct vm_exit *vmexit;
1657 KASSERT(vm->rendezvous_func != NULL, ("rendezvous not in progress"));
1659 vmexit = vm_exitinfo(vm, vcpuid);
1661 vmexit->inst_length = 0;
1662 vmexit->exitcode = VM_EXITCODE_RENDEZVOUS;
1663 vmm_stat_incr(vm, vcpuid, VMEXIT_RENDEZVOUS, 1);
1667 vm_exit_reqidle(struct vm *vm, int vcpuid, uint64_t rip)
1669 struct vm_exit *vmexit;
1671 vmexit = vm_exitinfo(vm, vcpuid);
1673 vmexit->inst_length = 0;
1674 vmexit->exitcode = VM_EXITCODE_REQIDLE;
1675 vmm_stat_incr(vm, vcpuid, VMEXIT_REQIDLE, 1);
1679 vm_exit_astpending(struct vm *vm, int vcpuid, uint64_t rip)
1681 struct vm_exit *vmexit;
1683 vmexit = vm_exitinfo(vm, vcpuid);
1685 vmexit->inst_length = 0;
1686 vmexit->exitcode = VM_EXITCODE_BOGUS;
1687 vmm_stat_incr(vm, vcpuid, VMEXIT_ASTPENDING, 1);
1691 vm_run(struct vm *vm, struct vm_run *vmrun)
1693 struct vm_eventinfo evinfo;
1698 struct vm_exit *vme;
1699 bool retu, intr_disabled;
1702 vcpuid = vmrun->cpuid;
1704 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
1707 if (!CPU_ISSET(vcpuid, &vm->active_cpus))
1710 if (CPU_ISSET(vcpuid, &vm->suspended_cpus))
1713 pmap = vmspace_pmap(vm->vmspace);
1714 vcpu = &vm->vcpu[vcpuid];
1715 vme = &vcpu->exitinfo;
1716 evinfo.rptr = &vm->rendezvous_func;
1717 evinfo.sptr = &vm->suspend;
1718 evinfo.iptr = &vcpu->reqidle;
1722 KASSERT(!CPU_ISSET(curcpu, &pmap->pm_active),
1723 ("vm_run: absurd pm_active"));
1727 pcb = PCPU_GET(curpcb);
1728 set_pcb_flags(pcb, PCB_FULL_IRET);
1730 restore_guest_fpustate(vcpu);
1732 vcpu_require_state(vm, vcpuid, VCPU_RUNNING);
1733 error = VMRUN(vm->cookie, vcpuid, vcpu->nextrip, pmap, &evinfo);
1734 vcpu_require_state(vm, vcpuid, VCPU_FROZEN);
1736 save_guest_fpustate(vcpu);
1738 vmm_stat_incr(vm, vcpuid, VCPU_TOTAL_RUNTIME, rdtsc() - tscval);
1744 vcpu->nextrip = vme->rip + vme->inst_length;
1745 switch (vme->exitcode) {
1746 case VM_EXITCODE_REQIDLE:
1747 error = vm_handle_reqidle(vm, vcpuid, &retu);
1749 case VM_EXITCODE_SUSPENDED:
1750 error = vm_handle_suspend(vm, vcpuid, &retu);
1752 case VM_EXITCODE_IOAPIC_EOI:
1753 vioapic_process_eoi(vm, vcpuid,
1754 vme->u.ioapic_eoi.vector);
1756 case VM_EXITCODE_RENDEZVOUS:
1757 error = vm_handle_rendezvous(vm, vcpuid);
1759 case VM_EXITCODE_HLT:
1760 intr_disabled = ((vme->u.hlt.rflags & PSL_I) == 0);
1761 error = vm_handle_hlt(vm, vcpuid, intr_disabled, &retu);
1763 case VM_EXITCODE_PAGING:
1764 error = vm_handle_paging(vm, vcpuid, &retu);
1766 case VM_EXITCODE_INST_EMUL:
1767 error = vm_handle_inst_emul(vm, vcpuid, &retu);
1769 case VM_EXITCODE_INOUT:
1770 case VM_EXITCODE_INOUT_STR:
1771 error = vm_handle_inout(vm, vcpuid, vme, &retu);
1773 case VM_EXITCODE_MONITOR:
1774 case VM_EXITCODE_MWAIT:
1775 case VM_EXITCODE_VMINSN:
1776 vm_inject_ud(vm, vcpuid);
1779 retu = true; /* handled in userland */
1784 if (error == 0 && retu == false)
1787 VCPU_CTR2(vm, vcpuid, "retu %d/%d", error, vme->exitcode);
1789 /* copy the exit information */
1790 bcopy(vme, &vmrun->vm_exit, sizeof(struct vm_exit));
1795 vm_restart_instruction(void *arg, int vcpuid)
1799 enum vcpu_state state;
1804 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
1807 vcpu = &vm->vcpu[vcpuid];
1808 state = vcpu_get_state(vm, vcpuid, NULL);
1809 if (state == VCPU_RUNNING) {
1811 * When a vcpu is "running" the next instruction is determined
1812 * by adding 'rip' and 'inst_length' in the vcpu's 'exitinfo'.
1813 * Thus setting 'inst_length' to zero will cause the current
1814 * instruction to be restarted.
1816 vcpu->exitinfo.inst_length = 0;
1817 VCPU_CTR1(vm, vcpuid, "restarting instruction at %#lx by "
1818 "setting inst_length to zero", vcpu->exitinfo.rip);
1819 } else if (state == VCPU_FROZEN) {
1821 * When a vcpu is "frozen" it is outside the critical section
1822 * around VMRUN() and 'nextrip' points to the next instruction.
1823 * Thus instruction restart is achieved by setting 'nextrip'
1824 * to the vcpu's %rip.
1826 error = vm_get_register(vm, vcpuid, VM_REG_GUEST_RIP, &rip);
1827 KASSERT(!error, ("%s: error %d getting rip", __func__, error));
1828 VCPU_CTR2(vm, vcpuid, "restarting instruction by updating "
1829 "nextrip from %#lx to %#lx", vcpu->nextrip, rip);
1830 vcpu->nextrip = rip;
1832 panic("%s: invalid state %d", __func__, state);
1838 vm_exit_intinfo(struct vm *vm, int vcpuid, uint64_t info)
1843 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
1846 vcpu = &vm->vcpu[vcpuid];
1848 if (info & VM_INTINFO_VALID) {
1849 type = info & VM_INTINFO_TYPE;
1850 vector = info & 0xff;
1851 if (type == VM_INTINFO_NMI && vector != IDT_NMI)
1853 if (type == VM_INTINFO_HWEXCEPTION && vector >= 32)
1855 if (info & VM_INTINFO_RSVD)
1860 VCPU_CTR2(vm, vcpuid, "%s: info1(%#lx)", __func__, info);
1861 vcpu->exitintinfo = info;
1871 #define IDT_VE 20 /* Virtualization Exception (Intel specific) */
1873 static enum exc_class
1874 exception_class(uint64_t info)
1878 KASSERT(info & VM_INTINFO_VALID, ("intinfo must be valid: %#lx", info));
1879 type = info & VM_INTINFO_TYPE;
1880 vector = info & 0xff;
1882 /* Table 6-4, "Interrupt and Exception Classes", Intel SDM, Vol 3 */
1884 case VM_INTINFO_HWINTR:
1885 case VM_INTINFO_SWINTR:
1886 case VM_INTINFO_NMI:
1887 return (EXC_BENIGN);
1890 * Hardware exception.
1892 * SVM and VT-x use identical type values to represent NMI,
1893 * hardware interrupt and software interrupt.
1895 * SVM uses type '3' for all exceptions. VT-x uses type '3'
1896 * for exceptions except #BP and #OF. #BP and #OF use a type
1897 * value of '5' or '6'. Therefore we don't check for explicit
1898 * values of 'type' to classify 'intinfo' into a hardware
1907 return (EXC_PAGEFAULT);
1913 return (EXC_CONTRIBUTORY);
1915 return (EXC_BENIGN);
1920 nested_fault(struct vm *vm, int vcpuid, uint64_t info1, uint64_t info2,
1923 enum exc_class exc1, exc2;
1926 KASSERT(info1 & VM_INTINFO_VALID, ("info1 %#lx is not valid", info1));
1927 KASSERT(info2 & VM_INTINFO_VALID, ("info2 %#lx is not valid", info2));
1930 * If an exception occurs while attempting to call the double-fault
1931 * handler the processor enters shutdown mode (aka triple fault).
1933 type1 = info1 & VM_INTINFO_TYPE;
1934 vector1 = info1 & 0xff;
1935 if (type1 == VM_INTINFO_HWEXCEPTION && vector1 == IDT_DF) {
1936 VCPU_CTR2(vm, vcpuid, "triple fault: info1(%#lx), info2(%#lx)",
1938 vm_suspend(vm, VM_SUSPEND_TRIPLEFAULT);
1944 * Table 6-5 "Conditions for Generating a Double Fault", Intel SDM, Vol3
1946 exc1 = exception_class(info1);
1947 exc2 = exception_class(info2);
1948 if ((exc1 == EXC_CONTRIBUTORY && exc2 == EXC_CONTRIBUTORY) ||
1949 (exc1 == EXC_PAGEFAULT && exc2 != EXC_BENIGN)) {
1950 /* Convert nested fault into a double fault. */
1952 *retinfo |= VM_INTINFO_VALID | VM_INTINFO_HWEXCEPTION;
1953 *retinfo |= VM_INTINFO_DEL_ERRCODE;
1955 /* Handle exceptions serially */
1962 vcpu_exception_intinfo(struct vcpu *vcpu)
1966 if (vcpu->exception_pending) {
1967 info = vcpu->exc_vector & 0xff;
1968 info |= VM_INTINFO_VALID | VM_INTINFO_HWEXCEPTION;
1969 if (vcpu->exc_errcode_valid) {
1970 info |= VM_INTINFO_DEL_ERRCODE;
1971 info |= (uint64_t)vcpu->exc_errcode << 32;
1978 vm_entry_intinfo(struct vm *vm, int vcpuid, uint64_t *retinfo)
1981 uint64_t info1, info2;
1984 KASSERT(vcpuid >= 0 &&
1985 vcpuid < vm->maxcpus, ("invalid vcpu %d", vcpuid));
1987 vcpu = &vm->vcpu[vcpuid];
1989 info1 = vcpu->exitintinfo;
1990 vcpu->exitintinfo = 0;
1993 if (vcpu->exception_pending) {
1994 info2 = vcpu_exception_intinfo(vcpu);
1995 vcpu->exception_pending = 0;
1996 VCPU_CTR2(vm, vcpuid, "Exception %d delivered: %#lx",
1997 vcpu->exc_vector, info2);
2000 if ((info1 & VM_INTINFO_VALID) && (info2 & VM_INTINFO_VALID)) {
2001 valid = nested_fault(vm, vcpuid, info1, info2, retinfo);
2002 } else if (info1 & VM_INTINFO_VALID) {
2005 } else if (info2 & VM_INTINFO_VALID) {
2013 VCPU_CTR4(vm, vcpuid, "%s: info1(%#lx), info2(%#lx), "
2014 "retinfo(%#lx)", __func__, info1, info2, *retinfo);
2021 vm_get_intinfo(struct vm *vm, int vcpuid, uint64_t *info1, uint64_t *info2)
2025 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
2028 vcpu = &vm->vcpu[vcpuid];
2029 *info1 = vcpu->exitintinfo;
2030 *info2 = vcpu_exception_intinfo(vcpu);
2035 vm_inject_exception(struct vm *vm, int vcpuid, int vector, int errcode_valid,
2036 uint32_t errcode, int restart_instruction)
2042 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
2045 if (vector < 0 || vector >= 32)
2049 * A double fault exception should never be injected directly into
2050 * the guest. It is a derived exception that results from specific
2051 * combinations of nested faults.
2053 if (vector == IDT_DF)
2056 vcpu = &vm->vcpu[vcpuid];
2058 if (vcpu->exception_pending) {
2059 VCPU_CTR2(vm, vcpuid, "Unable to inject exception %d due to "
2060 "pending exception %d", vector, vcpu->exc_vector);
2064 if (errcode_valid) {
2066 * Exceptions don't deliver an error code in real mode.
2068 error = vm_get_register(vm, vcpuid, VM_REG_GUEST_CR0, ®val);
2069 KASSERT(!error, ("%s: error %d getting CR0", __func__, error));
2070 if (!(regval & CR0_PE))
2075 * From section 26.6.1 "Interruptibility State" in Intel SDM:
2077 * Event blocking by "STI" or "MOV SS" is cleared after guest executes
2078 * one instruction or incurs an exception.
2080 error = vm_set_register(vm, vcpuid, VM_REG_GUEST_INTR_SHADOW, 0);
2081 KASSERT(error == 0, ("%s: error %d clearing interrupt shadow",
2084 if (restart_instruction)
2085 vm_restart_instruction(vm, vcpuid);
2087 vcpu->exception_pending = 1;
2088 vcpu->exc_vector = vector;
2089 vcpu->exc_errcode = errcode;
2090 vcpu->exc_errcode_valid = errcode_valid;
2091 VCPU_CTR1(vm, vcpuid, "Exception %d pending", vector);
2096 vm_inject_fault(void *vmarg, int vcpuid, int vector, int errcode_valid,
2100 int error, restart_instruction;
2103 restart_instruction = 1;
2105 error = vm_inject_exception(vm, vcpuid, vector, errcode_valid,
2106 errcode, restart_instruction);
2107 KASSERT(error == 0, ("vm_inject_exception error %d", error));
2111 vm_inject_pf(void *vmarg, int vcpuid, int error_code, uint64_t cr2)
2117 VCPU_CTR2(vm, vcpuid, "Injecting page fault: error_code %#x, cr2 %#lx",
2120 error = vm_set_register(vm, vcpuid, VM_REG_GUEST_CR2, cr2);
2121 KASSERT(error == 0, ("vm_set_register(cr2) error %d", error));
2123 vm_inject_fault(vm, vcpuid, IDT_PF, 1, error_code);
2126 static VMM_STAT(VCPU_NMI_COUNT, "number of NMIs delivered to vcpu");
2129 vm_inject_nmi(struct vm *vm, int vcpuid)
2133 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
2136 vcpu = &vm->vcpu[vcpuid];
2138 vcpu->nmi_pending = 1;
2139 vcpu_notify_event(vm, vcpuid, false);
2144 vm_nmi_pending(struct vm *vm, int vcpuid)
2148 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
2149 panic("vm_nmi_pending: invalid vcpuid %d", vcpuid);
2151 vcpu = &vm->vcpu[vcpuid];
2153 return (vcpu->nmi_pending);
2157 vm_nmi_clear(struct vm *vm, int vcpuid)
2161 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
2162 panic("vm_nmi_pending: invalid vcpuid %d", vcpuid);
2164 vcpu = &vm->vcpu[vcpuid];
2166 if (vcpu->nmi_pending == 0)
2167 panic("vm_nmi_clear: inconsistent nmi_pending state");
2169 vcpu->nmi_pending = 0;
2170 vmm_stat_incr(vm, vcpuid, VCPU_NMI_COUNT, 1);
2173 static VMM_STAT(VCPU_EXTINT_COUNT, "number of ExtINTs delivered to vcpu");
2176 vm_inject_extint(struct vm *vm, int vcpuid)
2180 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
2183 vcpu = &vm->vcpu[vcpuid];
2185 vcpu->extint_pending = 1;
2186 vcpu_notify_event(vm, vcpuid, false);
2191 vm_extint_pending(struct vm *vm, int vcpuid)
2195 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
2196 panic("vm_extint_pending: invalid vcpuid %d", vcpuid);
2198 vcpu = &vm->vcpu[vcpuid];
2200 return (vcpu->extint_pending);
2204 vm_extint_clear(struct vm *vm, int vcpuid)
2208 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
2209 panic("vm_extint_pending: invalid vcpuid %d", vcpuid);
2211 vcpu = &vm->vcpu[vcpuid];
2213 if (vcpu->extint_pending == 0)
2214 panic("vm_extint_clear: inconsistent extint_pending state");
2216 vcpu->extint_pending = 0;
2217 vmm_stat_incr(vm, vcpuid, VCPU_EXTINT_COUNT, 1);
2221 vm_get_capability(struct vm *vm, int vcpu, int type, int *retval)
2223 if (vcpu < 0 || vcpu >= vm->maxcpus)
2226 if (type < 0 || type >= VM_CAP_MAX)
2229 return (VMGETCAP(vm->cookie, vcpu, type, retval));
2233 vm_set_capability(struct vm *vm, int vcpu, int type, int val)
2235 if (vcpu < 0 || vcpu >= vm->maxcpus)
2238 if (type < 0 || type >= VM_CAP_MAX)
2241 return (VMSETCAP(vm->cookie, vcpu, type, val));
2245 vm_lapic(struct vm *vm, int cpu)
2247 return (vm->vcpu[cpu].vlapic);
2251 vm_ioapic(struct vm *vm)
2254 return (vm->vioapic);
2258 vm_hpet(struct vm *vm)
2265 vmm_is_pptdev(int bus, int slot, int func)
2268 char *val, *cp, *cp2;
2273 * The length of an environment variable is limited to 128 bytes which
2274 * puts an upper limit on the number of passthru devices that may be
2275 * specified using a single environment variable.
2277 * Work around this by scanning multiple environment variable
2278 * names instead of a single one - yuck!
2280 const char *names[] = { "pptdevs", "pptdevs2", "pptdevs3", NULL };
2282 /* set pptdevs="1/2/3 4/5/6 7/8/9 10/11/12" */
2284 for (i = 0; names[i] != NULL && !found; i++) {
2285 cp = val = kern_getenv(names[i]);
2286 while (cp != NULL && *cp != '\0') {
2287 if ((cp2 = strchr(cp, ' ')) != NULL)
2290 n = sscanf(cp, "%d/%d/%d", &b, &s, &f);
2291 if (n == 3 && bus == b && slot == s && func == f) {
2307 vm_iommu_domain(struct vm *vm)
2314 vcpu_set_state(struct vm *vm, int vcpuid, enum vcpu_state newstate,
2320 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
2321 panic("vm_set_run_state: invalid vcpuid %d", vcpuid);
2323 vcpu = &vm->vcpu[vcpuid];
2326 error = vcpu_set_state_locked(vm, vcpuid, newstate, from_idle);
2333 vcpu_get_state(struct vm *vm, int vcpuid, int *hostcpu)
2336 enum vcpu_state state;
2338 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
2339 panic("vm_get_run_state: invalid vcpuid %d", vcpuid);
2341 vcpu = &vm->vcpu[vcpuid];
2344 state = vcpu->state;
2345 if (hostcpu != NULL)
2346 *hostcpu = vcpu->hostcpu;
2353 vm_activate_cpu(struct vm *vm, int vcpuid)
2356 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
2359 if (CPU_ISSET(vcpuid, &vm->active_cpus))
2362 VCPU_CTR0(vm, vcpuid, "activated");
2363 CPU_SET_ATOMIC(vcpuid, &vm->active_cpus);
2368 vm_suspend_cpu(struct vm *vm, int vcpuid)
2372 if (vcpuid < -1 || vcpuid >= vm->maxcpus)
2376 vm->debug_cpus = vm->active_cpus;
2377 for (i = 0; i < vm->maxcpus; i++) {
2378 if (CPU_ISSET(i, &vm->active_cpus))
2379 vcpu_notify_event(vm, i, false);
2382 if (!CPU_ISSET(vcpuid, &vm->active_cpus))
2385 CPU_SET_ATOMIC(vcpuid, &vm->debug_cpus);
2386 vcpu_notify_event(vm, vcpuid, false);
2392 vm_resume_cpu(struct vm *vm, int vcpuid)
2395 if (vcpuid < -1 || vcpuid >= vm->maxcpus)
2399 CPU_ZERO(&vm->debug_cpus);
2401 if (!CPU_ISSET(vcpuid, &vm->debug_cpus))
2404 CPU_CLR_ATOMIC(vcpuid, &vm->debug_cpus);
2410 vcpu_debugged(struct vm *vm, int vcpuid)
2413 return (CPU_ISSET(vcpuid, &vm->debug_cpus));
2417 vm_active_cpus(struct vm *vm)
2420 return (vm->active_cpus);
2424 vm_debug_cpus(struct vm *vm)
2427 return (vm->debug_cpus);
2431 vm_suspended_cpus(struct vm *vm)
2434 return (vm->suspended_cpus);
2438 vcpu_stats(struct vm *vm, int vcpuid)
2441 return (vm->vcpu[vcpuid].stats);
2445 vm_get_x2apic_state(struct vm *vm, int vcpuid, enum x2apic_state *state)
2447 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
2450 *state = vm->vcpu[vcpuid].x2apic_state;
2456 vm_set_x2apic_state(struct vm *vm, int vcpuid, enum x2apic_state state)
2458 if (vcpuid < 0 || vcpuid >= vm->maxcpus)
2461 if (state >= X2APIC_STATE_LAST)
2464 vm->vcpu[vcpuid].x2apic_state = state;
2466 vlapic_set_x2apic_state(vm, vcpuid, state);
2472 * This function is called to ensure that a vcpu "sees" a pending event
2473 * as soon as possible:
2474 * - If the vcpu thread is sleeping then it is woken up.
2475 * - If the vcpu is running on a different host_cpu then an IPI will be directed
2476 * to the host_cpu to cause the vcpu to trap into the hypervisor.
2479 vcpu_notify_event_locked(struct vcpu *vcpu, bool lapic_intr)
2483 hostcpu = vcpu->hostcpu;
2484 if (vcpu->state == VCPU_RUNNING) {
2485 KASSERT(hostcpu != NOCPU, ("vcpu running on invalid hostcpu"));
2486 if (hostcpu != curcpu) {
2488 vlapic_post_intr(vcpu->vlapic, hostcpu,
2491 ipi_cpu(hostcpu, vmm_ipinum);
2495 * If the 'vcpu' is running on 'curcpu' then it must
2496 * be sending a notification to itself (e.g. SELF_IPI).
2497 * The pending event will be picked up when the vcpu
2498 * transitions back to guest context.
2502 KASSERT(hostcpu == NOCPU, ("vcpu state %d not consistent "
2503 "with hostcpu %d", vcpu->state, hostcpu));
2504 if (vcpu->state == VCPU_SLEEPING)
2510 vcpu_notify_event(struct vm *vm, int vcpuid, bool lapic_intr)
2512 struct vcpu *vcpu = &vm->vcpu[vcpuid];
2515 vcpu_notify_event_locked(vcpu, lapic_intr);
2520 vm_get_vmspace(struct vm *vm)
2523 return (vm->vmspace);
2527 vm_apicid2vcpuid(struct vm *vm, int apicid)
2530 * XXX apic id is assumed to be numerically identical to vcpu id
2536 vm_smp_rendezvous(struct vm *vm, int vcpuid, cpuset_t dest,
2537 vm_rendezvous_func_t func, void *arg)
2542 * Enforce that this function is called without any locks
2544 WITNESS_WARN(WARN_PANIC, NULL, "vm_smp_rendezvous");
2545 KASSERT(vcpuid == -1 || (vcpuid >= 0 && vcpuid < vm->maxcpus),
2546 ("vm_smp_rendezvous: invalid vcpuid %d", vcpuid));
2549 mtx_lock(&vm->rendezvous_mtx);
2550 if (vm->rendezvous_func != NULL) {
2552 * If a rendezvous is already in progress then we need to
2553 * call the rendezvous handler in case this 'vcpuid' is one
2554 * of the targets of the rendezvous.
2556 RENDEZVOUS_CTR0(vm, vcpuid, "Rendezvous already in progress");
2557 mtx_unlock(&vm->rendezvous_mtx);
2558 error = vm_handle_rendezvous(vm, vcpuid);
2563 KASSERT(vm->rendezvous_func == NULL, ("vm_smp_rendezvous: previous "
2564 "rendezvous is still in progress"));
2566 RENDEZVOUS_CTR0(vm, vcpuid, "Initiating rendezvous");
2567 vm->rendezvous_req_cpus = dest;
2568 CPU_ZERO(&vm->rendezvous_done_cpus);
2569 vm->rendezvous_arg = arg;
2570 vm->rendezvous_func = func;
2571 mtx_unlock(&vm->rendezvous_mtx);
2574 * Wake up any sleeping vcpus and trigger a VM-exit in any running
2575 * vcpus so they handle the rendezvous as soon as possible.
2577 for (i = 0; i < vm->maxcpus; i++) {
2578 if (CPU_ISSET(i, &dest))
2579 vcpu_notify_event(vm, i, false);
2582 return (vm_handle_rendezvous(vm, vcpuid));
2586 vm_atpic(struct vm *vm)
2588 return (vm->vatpic);
2592 vm_atpit(struct vm *vm)
2594 return (vm->vatpit);
2598 vm_pmtmr(struct vm *vm)
2601 return (vm->vpmtmr);
2605 vm_rtc(struct vm *vm)
2612 vm_segment_name(int seg)
2614 static enum vm_reg_name seg_names[] = {
2623 KASSERT(seg >= 0 && seg < nitems(seg_names),
2624 ("%s: invalid segment encoding %d", __func__, seg));
2625 return (seg_names[seg]);
2629 vm_copy_teardown(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo,
2634 for (idx = 0; idx < num_copyinfo; idx++) {
2635 if (copyinfo[idx].cookie != NULL)
2636 vm_gpa_release(copyinfo[idx].cookie);
2638 bzero(copyinfo, num_copyinfo * sizeof(struct vm_copyinfo));
2642 vm_copy_setup(struct vm *vm, int vcpuid, struct vm_guest_paging *paging,
2643 uint64_t gla, size_t len, int prot, struct vm_copyinfo *copyinfo,
2644 int num_copyinfo, int *fault)
2646 int error, idx, nused;
2647 size_t n, off, remaining;
2651 bzero(copyinfo, sizeof(struct vm_copyinfo) * num_copyinfo);
2655 while (remaining > 0) {
2656 KASSERT(nused < num_copyinfo, ("insufficient vm_copyinfo"));
2657 error = vm_gla2gpa(vm, vcpuid, paging, gla, prot, &gpa, fault);
2658 if (error || *fault)
2660 off = gpa & PAGE_MASK;
2661 n = min(remaining, PAGE_SIZE - off);
2662 copyinfo[nused].gpa = gpa;
2663 copyinfo[nused].len = n;
2669 for (idx = 0; idx < nused; idx++) {
2670 hva = vm_gpa_hold(vm, vcpuid, copyinfo[idx].gpa,
2671 copyinfo[idx].len, prot, &cookie);
2674 copyinfo[idx].hva = hva;
2675 copyinfo[idx].cookie = cookie;
2679 vm_copy_teardown(vm, vcpuid, copyinfo, num_copyinfo);
2688 vm_copyin(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo, void *kaddr,
2697 bcopy(copyinfo[idx].hva, dst, copyinfo[idx].len);
2698 len -= copyinfo[idx].len;
2699 dst += copyinfo[idx].len;
2705 vm_copyout(struct vm *vm, int vcpuid, const void *kaddr,
2706 struct vm_copyinfo *copyinfo, size_t len)
2714 bcopy(src, copyinfo[idx].hva, copyinfo[idx].len);
2715 len -= copyinfo[idx].len;
2716 src += copyinfo[idx].len;
2722 * Return the amount of in-use and wired memory for the VM. Since
2723 * these are global stats, only return the values with for vCPU 0
2725 VMM_STAT_DECLARE(VMM_MEM_RESIDENT);
2726 VMM_STAT_DECLARE(VMM_MEM_WIRED);
2729 vm_get_rescnt(struct vm *vm, int vcpu, struct vmm_stat_type *stat)
2733 vmm_stat_set(vm, vcpu, VMM_MEM_RESIDENT,
2734 PAGE_SIZE * vmspace_resident_count(vm->vmspace));
2739 vm_get_wiredcnt(struct vm *vm, int vcpu, struct vmm_stat_type *stat)
2743 vmm_stat_set(vm, vcpu, VMM_MEM_WIRED,
2744 PAGE_SIZE * pmap_wired_count(vmspace_pmap(vm->vmspace)));
2748 VMM_STAT_FUNC(VMM_MEM_RESIDENT, "Resident memory", vm_get_rescnt);
2749 VMM_STAT_FUNC(VMM_MEM_WIRED, "Wired memory", vm_get_wiredcnt);
2751 #ifdef BHYVE_SNAPSHOT
2753 vm_snapshot_vcpus(struct vm *vm, struct vm_snapshot_meta *meta)
2759 for (i = 0; i < VM_MAXCPU; i++) {
2760 vcpu = &vm->vcpu[i];
2762 SNAPSHOT_VAR_OR_LEAVE(vcpu->x2apic_state, meta, ret, done);
2763 SNAPSHOT_VAR_OR_LEAVE(vcpu->exitintinfo, meta, ret, done);
2764 SNAPSHOT_VAR_OR_LEAVE(vcpu->exc_vector, meta, ret, done);
2765 SNAPSHOT_VAR_OR_LEAVE(vcpu->exc_errcode_valid, meta, ret, done);
2766 SNAPSHOT_VAR_OR_LEAVE(vcpu->exc_errcode, meta, ret, done);
2767 SNAPSHOT_VAR_OR_LEAVE(vcpu->guest_xcr0, meta, ret, done);
2768 SNAPSHOT_VAR_OR_LEAVE(vcpu->exitinfo, meta, ret, done);
2769 SNAPSHOT_VAR_OR_LEAVE(vcpu->nextrip, meta, ret, done);
2770 /* XXX we're cheating here, since the value of tsc_offset as
2771 * saved here is actually the value of the guest's TSC value.
2773 * It will be turned turned back into an actual offset when the
2774 * TSC restore function is called
2776 SNAPSHOT_VAR_OR_LEAVE(vcpu->tsc_offset, meta, ret, done);
2784 vm_snapshot_vm(struct vm *vm, struct vm_snapshot_meta *meta)
2793 if (meta->op == VM_SNAPSHOT_SAVE) {
2794 /* XXX make tsc_offset take the value TSC proper as seen by the
2797 for (i = 0; i < VM_MAXCPU; i++)
2798 vm->vcpu[i].tsc_offset += now;
2801 ret = vm_snapshot_vcpus(vm, meta);
2803 printf("%s: failed to copy vm data to user buffer", __func__);
2807 if (meta->op == VM_SNAPSHOT_SAVE) {
2808 /* XXX turn tsc_offset back into an offset; actual value is only
2809 * required for restore; using it otherwise would be wrong
2811 for (i = 0; i < VM_MAXCPU; i++)
2812 vm->vcpu[i].tsc_offset -= now;
2820 vm_snapshot_vmcx(struct vm *vm, struct vm_snapshot_meta *meta)
2826 for (i = 0; i < VM_MAXCPU; i++) {
2827 error = VM_SNAPSHOT_VMCX(vm->cookie, meta, i);
2829 printf("%s: failed to snapshot vmcs/vmcb data for "
2830 "vCPU: %d; error: %d\n", __func__, i, error);
2840 * Save kernel-side structures to user-space for snapshotting.
2843 vm_snapshot_req(struct vm *vm, struct vm_snapshot_meta *meta)
2847 switch (meta->dev_req) {
2849 ret = VM_SNAPSHOT_VMI(vm->cookie, meta);
2852 ret = vm_snapshot_vmcx(vm, meta);
2855 ret = vm_snapshot_vm(vm, meta);
2857 case STRUCT_VIOAPIC:
2858 ret = vioapic_snapshot(vm_ioapic(vm), meta);
2861 ret = vlapic_snapshot(vm, meta);
2864 ret = vhpet_snapshot(vm_hpet(vm), meta);
2867 ret = vatpic_snapshot(vm_atpic(vm), meta);
2870 ret = vatpit_snapshot(vm_atpit(vm), meta);
2873 ret = vpmtmr_snapshot(vm_pmtmr(vm), meta);
2876 ret = vrtc_snapshot(vm_rtc(vm), meta);
2879 printf("%s: failed to find the requested type %#x\n",
2880 __func__, meta->dev_req);
2887 vm_set_tsc_offset(struct vm *vm, int vcpuid, uint64_t offset)
2891 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2894 vcpu = &vm->vcpu[vcpuid];
2895 vcpu->tsc_offset = offset;
2901 vm_restore_time(struct vm *vm)
2909 error = vhpet_restore_time(vm_hpet(vm));
2913 for (i = 0; i < nitems(vm->vcpu); i++) {
2914 vcpu = &vm->vcpu[i];
2916 error = VM_RESTORE_TSC(vm->cookie, i, vcpu->tsc_offset - now);