2 * Copyright (c) 2011 NetApp, Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/sysctl.h>
37 #include <sys/malloc.h>
40 #include <sys/mutex.h>
42 #include <sys/rwlock.h>
43 #include <sys/sched.h>
45 #include <sys/systm.h>
48 #include <vm/vm_object.h>
49 #include <vm/vm_page.h>
51 #include <vm/vm_map.h>
52 #include <vm/vm_extern.h>
53 #include <vm/vm_param.h>
55 #include <machine/cpu.h>
56 #include <machine/vm.h>
57 #include <machine/pcb.h>
58 #include <machine/smp.h>
60 #include <x86/apicreg.h>
61 #include <machine/vmparam.h>
63 #include <machine/vmm.h>
64 #include <machine/vmm_dev.h>
65 #include <machine/vmm_instruction_emul.h>
67 #include "vmm_ioport.h"
80 #include "vmm_lapic.h"
89 * (a) allocated when vcpu is created
90 * (i) initialized when vcpu is created and when it is reinitialized
91 * (o) initialized the first time the vcpu is created
92 * (x) initialized before use
95 struct mtx mtx; /* (o) protects 'state' and 'hostcpu' */
96 enum vcpu_state state; /* (o) vcpu state */
97 int hostcpu; /* (o) vcpu's host cpu */
98 int reqidle; /* (i) request vcpu to idle */
99 struct vlapic *vlapic; /* (i) APIC device model */
100 enum x2apic_state x2apic_state; /* (i) APIC mode */
101 uint64_t exitintinfo; /* (i) events pending at VM exit */
102 int nmi_pending; /* (i) NMI pending */
103 int extint_pending; /* (i) INTR pending */
104 int exception_pending; /* (i) exception pending */
105 int exc_vector; /* (x) exception collateral */
106 int exc_errcode_valid;
107 uint32_t exc_errcode;
108 struct savefpu *guestfpu; /* (a,i) guest fpu state */
109 uint64_t guest_xcr0; /* (i) guest %xcr0 register */
110 void *stats; /* (a,i) statistics */
111 struct vm_exit exitinfo; /* (x) exit reason and collateral */
112 uint64_t nextrip; /* (x) next instruction to execute */
115 #define vcpu_lock_initialized(v) mtx_initialized(&((v)->mtx))
116 #define vcpu_lock_init(v) mtx_init(&((v)->mtx), "vcpu lock", 0, MTX_SPIN)
117 #define vcpu_lock(v) mtx_lock_spin(&((v)->mtx))
118 #define vcpu_unlock(v) mtx_unlock_spin(&((v)->mtx))
119 #define vcpu_assert_locked(v) mtx_assert(&((v)->mtx), MA_OWNED)
127 #define VM_MAX_MEMORY_SEGMENTS 2
131 * (o) initialized the first time the VM is created
132 * (i) initialized when VM is created and when it is reinitialized
133 * (x) initialized before use
136 void *cookie; /* (i) cpu-specific data */
137 void *iommu; /* (x) iommu-specific data */
138 struct vhpet *vhpet; /* (i) virtual HPET */
139 struct vioapic *vioapic; /* (i) virtual ioapic */
140 struct vatpic *vatpic; /* (i) virtual atpic */
141 struct vatpit *vatpit; /* (i) virtual atpit */
142 struct vpmtmr *vpmtmr; /* (i) virtual ACPI PM timer */
143 struct vrtc *vrtc; /* (o) virtual RTC */
144 volatile cpuset_t active_cpus; /* (i) active vcpus */
145 int suspend; /* (i) stop VM execution */
146 volatile cpuset_t suspended_cpus; /* (i) suspended vcpus */
147 volatile cpuset_t halted_cpus; /* (x) cpus in a hard halt */
148 cpuset_t rendezvous_req_cpus; /* (x) rendezvous requested */
149 cpuset_t rendezvous_done_cpus; /* (x) rendezvous finished */
150 void *rendezvous_arg; /* (x) rendezvous func/arg */
151 vm_rendezvous_func_t rendezvous_func;
152 struct mtx rendezvous_mtx; /* (o) rendezvous lock */
153 int num_mem_segs; /* (o) guest memory segments */
154 struct mem_seg mem_segs[VM_MAX_MEMORY_SEGMENTS];
155 struct vmspace *vmspace; /* (o) guest's address space */
156 char name[VM_MAX_NAMELEN]; /* (o) virtual machine name */
157 struct vcpu vcpu[VM_MAXCPU]; /* (i) guest vcpus */
160 static int vmm_initialized;
162 static struct vmm_ops *ops;
163 #define VMM_INIT(num) (ops != NULL ? (*ops->init)(num) : 0)
164 #define VMM_CLEANUP() (ops != NULL ? (*ops->cleanup)() : 0)
165 #define VMM_RESUME() (ops != NULL ? (*ops->resume)() : 0)
167 #define VMINIT(vm, pmap) (ops != NULL ? (*ops->vminit)(vm, pmap): NULL)
168 #define VMRUN(vmi, vcpu, rip, pmap, evinfo) \
169 (ops != NULL ? (*ops->vmrun)(vmi, vcpu, rip, pmap, evinfo) : ENXIO)
170 #define VMCLEANUP(vmi) (ops != NULL ? (*ops->vmcleanup)(vmi) : NULL)
171 #define VMSPACE_ALLOC(min, max) \
172 (ops != NULL ? (*ops->vmspace_alloc)(min, max) : NULL)
173 #define VMSPACE_FREE(vmspace) \
174 (ops != NULL ? (*ops->vmspace_free)(vmspace) : ENXIO)
175 #define VMGETREG(vmi, vcpu, num, retval) \
176 (ops != NULL ? (*ops->vmgetreg)(vmi, vcpu, num, retval) : ENXIO)
177 #define VMSETREG(vmi, vcpu, num, val) \
178 (ops != NULL ? (*ops->vmsetreg)(vmi, vcpu, num, val) : ENXIO)
179 #define VMGETDESC(vmi, vcpu, num, desc) \
180 (ops != NULL ? (*ops->vmgetdesc)(vmi, vcpu, num, desc) : ENXIO)
181 #define VMSETDESC(vmi, vcpu, num, desc) \
182 (ops != NULL ? (*ops->vmsetdesc)(vmi, vcpu, num, desc) : ENXIO)
183 #define VMGETCAP(vmi, vcpu, num, retval) \
184 (ops != NULL ? (*ops->vmgetcap)(vmi, vcpu, num, retval) : ENXIO)
185 #define VMSETCAP(vmi, vcpu, num, val) \
186 (ops != NULL ? (*ops->vmsetcap)(vmi, vcpu, num, val) : ENXIO)
187 #define VLAPIC_INIT(vmi, vcpu) \
188 (ops != NULL ? (*ops->vlapic_init)(vmi, vcpu) : NULL)
189 #define VLAPIC_CLEANUP(vmi, vlapic) \
190 (ops != NULL ? (*ops->vlapic_cleanup)(vmi, vlapic) : NULL)
192 #define fpu_start_emulating() load_cr0(rcr0() | CR0_TS)
193 #define fpu_stop_emulating() clts()
195 static MALLOC_DEFINE(M_VM, "vm", "vm");
198 static VMM_STAT(VCPU_TOTAL_RUNTIME, "vcpu total runtime");
200 SYSCTL_NODE(_hw, OID_AUTO, vmm, CTLFLAG_RW, NULL, NULL);
203 * Halt the guest if all vcpus are executing a HLT instruction with
204 * interrupts disabled.
206 static int halt_detection_enabled = 1;
207 SYSCTL_INT(_hw_vmm, OID_AUTO, halt_detection, CTLFLAG_RDTUN,
208 &halt_detection_enabled, 0,
209 "Halt VM if all vcpus execute HLT with interrupts disabled");
211 static int vmm_ipinum;
212 SYSCTL_INT(_hw_vmm, OID_AUTO, ipinum, CTLFLAG_RD, &vmm_ipinum, 0,
213 "IPI vector used for vcpu notifications");
215 static int trace_guest_exceptions;
216 SYSCTL_INT(_hw_vmm, OID_AUTO, trace_guest_exceptions, CTLFLAG_RDTUN,
217 &trace_guest_exceptions, 0,
218 "Trap into hypervisor on all guest exceptions and reflect them back");
220 static int vmm_force_iommu = 0;
221 TUNABLE_INT("hw.vmm.force_iommu", &vmm_force_iommu);
222 SYSCTL_INT(_hw_vmm, OID_AUTO, force_iommu, CTLFLAG_RDTUN, &vmm_force_iommu, 0,
223 "Force use of I/O MMU even if no passthrough devices were found.");
225 static void vcpu_notify_event_locked(struct vcpu *vcpu, bool lapic_intr);
229 vcpu_state2str(enum vcpu_state state)
248 vcpu_cleanup(struct vm *vm, int i, bool destroy)
250 struct vcpu *vcpu = &vm->vcpu[i];
252 VLAPIC_CLEANUP(vm->cookie, vcpu->vlapic);
254 vmm_stat_free(vcpu->stats);
255 fpu_save_area_free(vcpu->guestfpu);
260 vcpu_init(struct vm *vm, int vcpu_id, bool create)
264 KASSERT(vcpu_id >= 0 && vcpu_id < VM_MAXCPU,
265 ("vcpu_init: invalid vcpu %d", vcpu_id));
267 vcpu = &vm->vcpu[vcpu_id];
270 KASSERT(!vcpu_lock_initialized(vcpu), ("vcpu %d already "
271 "initialized", vcpu_id));
272 vcpu_lock_init(vcpu);
273 vcpu->state = VCPU_IDLE;
274 vcpu->hostcpu = NOCPU;
275 vcpu->guestfpu = fpu_save_area_alloc();
276 vcpu->stats = vmm_stat_alloc();
279 vcpu->vlapic = VLAPIC_INIT(vm->cookie, vcpu_id);
280 vm_set_x2apic_state(vm, vcpu_id, X2APIC_DISABLED);
282 vcpu->exitintinfo = 0;
283 vcpu->nmi_pending = 0;
284 vcpu->extint_pending = 0;
285 vcpu->exception_pending = 0;
286 vcpu->guest_xcr0 = XFEATURE_ENABLED_X87;
287 fpu_save_area_reset(vcpu->guestfpu);
288 vmm_stat_init(vcpu->stats);
292 vcpu_trace_exceptions(struct vm *vm, int vcpuid)
295 return (trace_guest_exceptions);
299 vm_exitinfo(struct vm *vm, int cpuid)
303 if (cpuid < 0 || cpuid >= VM_MAXCPU)
304 panic("vm_exitinfo: invalid cpuid %d", cpuid);
306 vcpu = &vm->vcpu[cpuid];
308 return (&vcpu->exitinfo);
322 vmm_host_state_init();
324 vmm_ipinum = lapic_ipi_alloc(&IDTVEC(justreturn));
326 vmm_ipinum = IPI_AST;
328 error = vmm_mem_init();
333 ops = &vmm_ops_intel;
334 else if (vmm_is_amd())
339 vmm_resume_p = vmm_resume;
341 return (VMM_INIT(vmm_ipinum));
345 vmm_handler(module_t mod, int what, void *arg)
352 if (vmm_force_iommu || ppt_avail_devices() > 0)
359 error = vmmdev_cleanup();
363 if (vmm_ipinum != IPI_AST)
364 lapic_ipi_free(vmm_ipinum);
365 error = VMM_CLEANUP();
367 * Something bad happened - prevent new
368 * VMs from being created
381 static moduledata_t vmm_kmod = {
388 * vmm initialization has the following dependencies:
390 * - iommu initialization must happen after the pci passthru driver has had
391 * a chance to attach to any passthru devices (after SI_SUB_CONFIGURE).
393 * - VT-x initialization requires smp_rendezvous() and therefore must happen
394 * after SMP is fully functional (after SI_SUB_SMP).
396 DECLARE_MODULE(vmm, vmm_kmod, SI_SUB_SMP + 1, SI_ORDER_ANY);
397 MODULE_VERSION(vmm, 1);
400 vm_init(struct vm *vm, bool create)
404 vm->cookie = VMINIT(vm, vmspace_pmap(vm->vmspace));
406 vm->vioapic = vioapic_init(vm);
407 vm->vhpet = vhpet_init(vm);
408 vm->vatpic = vatpic_init(vm);
409 vm->vatpit = vatpit_init(vm);
410 vm->vpmtmr = vpmtmr_init(vm);
412 vm->vrtc = vrtc_init(vm);
414 CPU_ZERO(&vm->active_cpus);
417 CPU_ZERO(&vm->suspended_cpus);
419 for (i = 0; i < VM_MAXCPU; i++)
420 vcpu_init(vm, i, create);
424 vm_create(const char *name, struct vm **retvm)
427 struct vmspace *vmspace;
430 * If vmm.ko could not be successfully initialized then don't attempt
431 * to create the virtual machine.
433 if (!vmm_initialized)
436 if (name == NULL || strlen(name) >= VM_MAX_NAMELEN)
439 vmspace = VMSPACE_ALLOC(0, VM_MAXUSER_ADDRESS);
443 vm = malloc(sizeof(struct vm), M_VM, M_WAITOK | M_ZERO);
444 strcpy(vm->name, name);
445 vm->num_mem_segs = 0;
446 vm->vmspace = vmspace;
447 mtx_init(&vm->rendezvous_mtx, "vm rendezvous lock", 0, MTX_DEF);
456 vm_free_mem_seg(struct vm *vm, struct mem_seg *seg)
459 if (seg->object != NULL)
460 vmm_mem_free(vm->vmspace, seg->gpa, seg->len);
462 bzero(seg, sizeof(*seg));
466 vm_cleanup(struct vm *vm, bool destroy)
470 ppt_unassign_all(vm);
472 if (vm->iommu != NULL)
473 iommu_destroy_domain(vm->iommu);
476 vrtc_cleanup(vm->vrtc);
478 vrtc_reset(vm->vrtc);
479 vpmtmr_cleanup(vm->vpmtmr);
480 vatpit_cleanup(vm->vatpit);
481 vhpet_cleanup(vm->vhpet);
482 vatpic_cleanup(vm->vatpic);
483 vioapic_cleanup(vm->vioapic);
485 for (i = 0; i < VM_MAXCPU; i++)
486 vcpu_cleanup(vm, i, destroy);
488 VMCLEANUP(vm->cookie);
491 for (i = 0; i < vm->num_mem_segs; i++)
492 vm_free_mem_seg(vm, &vm->mem_segs[i]);
494 vm->num_mem_segs = 0;
496 VMSPACE_FREE(vm->vmspace);
502 vm_destroy(struct vm *vm)
504 vm_cleanup(vm, true);
509 vm_reinit(struct vm *vm)
514 * A virtual machine can be reset only if all vcpus are suspended.
516 if (CPU_CMP(&vm->suspended_cpus, &vm->active_cpus) == 0) {
517 vm_cleanup(vm, false);
528 vm_name(struct vm *vm)
534 vm_map_mmio(struct vm *vm, vm_paddr_t gpa, size_t len, vm_paddr_t hpa)
538 if ((obj = vmm_mmio_alloc(vm->vmspace, gpa, len, hpa)) == NULL)
545 vm_unmap_mmio(struct vm *vm, vm_paddr_t gpa, size_t len)
548 vmm_mmio_free(vm->vmspace, gpa, len);
553 vm_mem_allocated(struct vm *vm, vm_paddr_t gpa)
556 vm_paddr_t gpabase, gpalimit;
558 for (i = 0; i < vm->num_mem_segs; i++) {
559 gpabase = vm->mem_segs[i].gpa;
560 gpalimit = gpabase + vm->mem_segs[i].len;
561 if (gpa >= gpabase && gpa < gpalimit)
562 return (TRUE); /* 'gpa' is regular memory */
565 if (ppt_is_mmio(vm, gpa))
566 return (TRUE); /* 'gpa' is pci passthru mmio */
572 vm_malloc(struct vm *vm, vm_paddr_t gpa, size_t len)
574 int available, allocated;
579 if ((gpa & PAGE_MASK) || (len & PAGE_MASK) || len == 0)
582 available = allocated = 0;
584 while (g < gpa + len) {
585 if (vm_mem_allocated(vm, g))
594 * If there are some allocated and some available pages in the address
595 * range then it is an error.
597 if (allocated && available)
601 * If the entire address range being requested has already been
602 * allocated then there isn't anything more to do.
604 if (allocated && available == 0)
607 if (vm->num_mem_segs >= VM_MAX_MEMORY_SEGMENTS)
610 seg = &vm->mem_segs[vm->num_mem_segs];
612 if ((object = vmm_mem_alloc(vm->vmspace, gpa, len)) == NULL)
617 seg->object = object;
626 vm_maxmem(struct vm *vm)
629 vm_paddr_t gpa, maxmem;
632 for (i = 0; i < vm->num_mem_segs; i++) {
633 gpa = vm->mem_segs[i].gpa + vm->mem_segs[i].len;
641 vm_gpa_unwire(struct vm *vm)
646 for (i = 0; i < vm->num_mem_segs; i++) {
647 seg = &vm->mem_segs[i];
651 rv = vm_map_unwire(&vm->vmspace->vm_map,
652 seg->gpa, seg->gpa + seg->len,
653 VM_MAP_WIRE_USER | VM_MAP_WIRE_NOHOLES);
654 KASSERT(rv == KERN_SUCCESS, ("vm(%s) memory segment "
655 "%#lx/%ld could not be unwired: %d",
656 vm_name(vm), seg->gpa, seg->len, rv));
663 vm_gpa_wire(struct vm *vm)
668 for (i = 0; i < vm->num_mem_segs; i++) {
669 seg = &vm->mem_segs[i];
674 rv = vm_map_wire(&vm->vmspace->vm_map,
675 seg->gpa, seg->gpa + seg->len,
676 VM_MAP_WIRE_USER | VM_MAP_WIRE_NOHOLES);
677 if (rv != KERN_SUCCESS)
683 if (i < vm->num_mem_segs) {
685 * Undo the wiring before returning an error.
695 vm_iommu_modify(struct vm *vm, boolean_t map)
700 void *vp, *cookie, *host_domain;
703 host_domain = iommu_host_domain();
705 for (i = 0; i < vm->num_mem_segs; i++) {
706 seg = &vm->mem_segs[i];
707 KASSERT(seg->wired, ("vm(%s) memory segment %#lx/%ld not wired",
708 vm_name(vm), seg->gpa, seg->len));
711 while (gpa < seg->gpa + seg->len) {
712 vp = vm_gpa_hold(vm, gpa, PAGE_SIZE, VM_PROT_WRITE,
714 KASSERT(vp != NULL, ("vm(%s) could not map gpa %#lx",
717 vm_gpa_release(cookie);
719 hpa = DMAP_TO_PHYS((uintptr_t)vp);
721 iommu_create_mapping(vm->iommu, gpa, hpa, sz);
722 iommu_remove_mapping(host_domain, hpa, sz);
724 iommu_remove_mapping(vm->iommu, gpa, sz);
725 iommu_create_mapping(host_domain, hpa, hpa, sz);
733 * Invalidate the cached translations associated with the domain
734 * from which pages were removed.
737 iommu_invalidate_tlb(host_domain);
739 iommu_invalidate_tlb(vm->iommu);
742 #define vm_iommu_unmap(vm) vm_iommu_modify((vm), FALSE)
743 #define vm_iommu_map(vm) vm_iommu_modify((vm), TRUE)
746 vm_unassign_pptdev(struct vm *vm, int bus, int slot, int func)
750 error = ppt_unassign_device(vm, bus, slot, func);
754 if (ppt_assigned_devices(vm) == 0) {
762 vm_assign_pptdev(struct vm *vm, int bus, int slot, int func)
768 * Virtual machines with pci passthru devices get special treatment:
769 * - the guest physical memory is wired
770 * - the iommu is programmed to do the 'gpa' to 'hpa' translation
772 * We need to do this before the first pci passthru device is attached.
774 if (ppt_assigned_devices(vm) == 0) {
775 KASSERT(vm->iommu == NULL,
776 ("vm_assign_pptdev: iommu must be NULL"));
777 maxaddr = vm_maxmem(vm);
778 vm->iommu = iommu_create_domain(maxaddr);
780 error = vm_gpa_wire(vm);
787 error = ppt_assign_device(vm, bus, slot, func);
792 vm_gpa_hold(struct vm *vm, vm_paddr_t gpa, size_t len, int reqprot,
798 pageoff = gpa & PAGE_MASK;
799 if (len > PAGE_SIZE - pageoff)
800 panic("vm_gpa_hold: invalid gpa/len: 0x%016lx/%lu", gpa, len);
802 count = vm_fault_quick_hold_pages(&vm->vmspace->vm_map,
803 trunc_page(gpa), PAGE_SIZE, reqprot, &m, 1);
807 return ((void *)(PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m)) + pageoff));
815 vm_gpa_release(void *cookie)
817 vm_page_t m = cookie;
825 vm_gpabase2memseg(struct vm *vm, vm_paddr_t gpabase,
826 struct vm_memory_segment *seg)
830 for (i = 0; i < vm->num_mem_segs; i++) {
831 if (gpabase == vm->mem_segs[i].gpa) {
832 seg->gpa = vm->mem_segs[i].gpa;
833 seg->len = vm->mem_segs[i].len;
834 seg->wired = vm->mem_segs[i].wired;
842 vm_get_memobj(struct vm *vm, vm_paddr_t gpa, size_t len,
843 vm_offset_t *offset, struct vm_object **object)
850 for (i = 0; i < vm->num_mem_segs; i++) {
851 if ((seg_obj = vm->mem_segs[i].object) == NULL)
854 seg_gpa = vm->mem_segs[i].gpa;
855 seg_len = vm->mem_segs[i].len;
857 if (gpa >= seg_gpa && gpa < seg_gpa + seg_len) {
858 *offset = gpa - seg_gpa;
860 vm_object_reference(seg_obj);
869 vm_get_register(struct vm *vm, int vcpu, int reg, uint64_t *retval)
872 if (vcpu < 0 || vcpu >= VM_MAXCPU)
875 if (reg >= VM_REG_LAST)
878 return (VMGETREG(vm->cookie, vcpu, reg, retval));
882 vm_set_register(struct vm *vm, int vcpuid, int reg, uint64_t val)
887 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
890 if (reg >= VM_REG_LAST)
893 error = VMSETREG(vm->cookie, vcpuid, reg, val);
894 if (error || reg != VM_REG_GUEST_RIP)
897 /* Set 'nextrip' to match the value of %rip */
898 VCPU_CTR1(vm, vcpuid, "Setting nextrip to %#lx", val);
899 vcpu = &vm->vcpu[vcpuid];
905 is_descriptor_table(int reg)
909 case VM_REG_GUEST_IDTR:
910 case VM_REG_GUEST_GDTR:
918 is_segment_register(int reg)
922 case VM_REG_GUEST_ES:
923 case VM_REG_GUEST_CS:
924 case VM_REG_GUEST_SS:
925 case VM_REG_GUEST_DS:
926 case VM_REG_GUEST_FS:
927 case VM_REG_GUEST_GS:
928 case VM_REG_GUEST_TR:
929 case VM_REG_GUEST_LDTR:
937 vm_get_seg_desc(struct vm *vm, int vcpu, int reg,
938 struct seg_desc *desc)
941 if (vcpu < 0 || vcpu >= VM_MAXCPU)
944 if (!is_segment_register(reg) && !is_descriptor_table(reg))
947 return (VMGETDESC(vm->cookie, vcpu, reg, desc));
951 vm_set_seg_desc(struct vm *vm, int vcpu, int reg,
952 struct seg_desc *desc)
954 if (vcpu < 0 || vcpu >= VM_MAXCPU)
957 if (!is_segment_register(reg) && !is_descriptor_table(reg))
960 return (VMSETDESC(vm->cookie, vcpu, reg, desc));
964 restore_guest_fpustate(struct vcpu *vcpu)
967 /* flush host state to the pcb */
970 /* restore guest FPU state */
971 fpu_stop_emulating();
972 fpurestore(vcpu->guestfpu);
974 /* restore guest XCR0 if XSAVE is enabled in the host */
975 if (rcr4() & CR4_XSAVE)
976 load_xcr(0, vcpu->guest_xcr0);
979 * The FPU is now "dirty" with the guest's state so turn on emulation
980 * to trap any access to the FPU by the host.
982 fpu_start_emulating();
986 save_guest_fpustate(struct vcpu *vcpu)
989 if ((rcr0() & CR0_TS) == 0)
990 panic("fpu emulation not enabled in host!");
992 /* save guest XCR0 and restore host XCR0 */
993 if (rcr4() & CR4_XSAVE) {
994 vcpu->guest_xcr0 = rxcr(0);
995 load_xcr(0, vmm_get_host_xcr0());
998 /* save guest FPU state */
999 fpu_stop_emulating();
1000 fpusave(vcpu->guestfpu);
1001 fpu_start_emulating();
1004 static VMM_STAT(VCPU_IDLE_TICKS, "number of ticks vcpu was idle");
1007 vcpu_set_state_locked(struct vm *vm, int vcpuid, enum vcpu_state newstate,
1013 vcpu = &vm->vcpu[vcpuid];
1014 vcpu_assert_locked(vcpu);
1017 * State transitions from the vmmdev_ioctl() must always begin from
1018 * the VCPU_IDLE state. This guarantees that there is only a single
1019 * ioctl() operating on a vcpu at any point.
1022 while (vcpu->state != VCPU_IDLE) {
1024 vcpu_notify_event_locked(vcpu, false);
1025 VCPU_CTR1(vm, vcpuid, "vcpu state change from %s to "
1026 "idle requested", vcpu_state2str(vcpu->state));
1027 msleep_spin(&vcpu->state, &vcpu->mtx, "vmstat", hz);
1030 KASSERT(vcpu->state != VCPU_IDLE, ("invalid transition from "
1031 "vcpu idle state"));
1034 if (vcpu->state == VCPU_RUNNING) {
1035 KASSERT(vcpu->hostcpu == curcpu, ("curcpu %d and hostcpu %d "
1036 "mismatch for running vcpu", curcpu, vcpu->hostcpu));
1038 KASSERT(vcpu->hostcpu == NOCPU, ("Invalid hostcpu %d for a "
1039 "vcpu that is not running", vcpu->hostcpu));
1043 * The following state transitions are allowed:
1044 * IDLE -> FROZEN -> IDLE
1045 * FROZEN -> RUNNING -> FROZEN
1046 * FROZEN -> SLEEPING -> FROZEN
1048 switch (vcpu->state) {
1052 error = (newstate != VCPU_FROZEN);
1055 error = (newstate == VCPU_FROZEN);
1065 VCPU_CTR2(vm, vcpuid, "vcpu state changed from %s to %s",
1066 vcpu_state2str(vcpu->state), vcpu_state2str(newstate));
1068 vcpu->state = newstate;
1069 if (newstate == VCPU_RUNNING)
1070 vcpu->hostcpu = curcpu;
1072 vcpu->hostcpu = NOCPU;
1074 if (newstate == VCPU_IDLE)
1075 wakeup(&vcpu->state);
1081 vcpu_require_state(struct vm *vm, int vcpuid, enum vcpu_state newstate)
1085 if ((error = vcpu_set_state(vm, vcpuid, newstate, false)) != 0)
1086 panic("Error %d setting state to %d\n", error, newstate);
1090 vcpu_require_state_locked(struct vm *vm, int vcpuid, enum vcpu_state newstate)
1094 if ((error = vcpu_set_state_locked(vm, vcpuid, newstate, false)) != 0)
1095 panic("Error %d setting state to %d", error, newstate);
1099 vm_set_rendezvous_func(struct vm *vm, vm_rendezvous_func_t func)
1102 KASSERT(mtx_owned(&vm->rendezvous_mtx), ("rendezvous_mtx not locked"));
1105 * Update 'rendezvous_func' and execute a write memory barrier to
1106 * ensure that it is visible across all host cpus. This is not needed
1107 * for correctness but it does ensure that all the vcpus will notice
1108 * that the rendezvous is requested immediately.
1110 vm->rendezvous_func = func;
1114 #define RENDEZVOUS_CTR0(vm, vcpuid, fmt) \
1117 VCPU_CTR0(vm, vcpuid, fmt); \
1123 vm_handle_rendezvous(struct vm *vm, int vcpuid)
1126 KASSERT(vcpuid == -1 || (vcpuid >= 0 && vcpuid < VM_MAXCPU),
1127 ("vm_handle_rendezvous: invalid vcpuid %d", vcpuid));
1129 mtx_lock(&vm->rendezvous_mtx);
1130 while (vm->rendezvous_func != NULL) {
1131 /* 'rendezvous_req_cpus' must be a subset of 'active_cpus' */
1132 CPU_AND(&vm->rendezvous_req_cpus, &vm->active_cpus);
1135 CPU_ISSET(vcpuid, &vm->rendezvous_req_cpus) &&
1136 !CPU_ISSET(vcpuid, &vm->rendezvous_done_cpus)) {
1137 VCPU_CTR0(vm, vcpuid, "Calling rendezvous func");
1138 (*vm->rendezvous_func)(vm, vcpuid, vm->rendezvous_arg);
1139 CPU_SET(vcpuid, &vm->rendezvous_done_cpus);
1141 if (CPU_CMP(&vm->rendezvous_req_cpus,
1142 &vm->rendezvous_done_cpus) == 0) {
1143 VCPU_CTR0(vm, vcpuid, "Rendezvous completed");
1144 vm_set_rendezvous_func(vm, NULL);
1145 wakeup(&vm->rendezvous_func);
1148 RENDEZVOUS_CTR0(vm, vcpuid, "Wait for rendezvous completion");
1149 mtx_sleep(&vm->rendezvous_func, &vm->rendezvous_mtx, 0,
1152 mtx_unlock(&vm->rendezvous_mtx);
1156 * Emulate a guest 'hlt' by sleeping until the vcpu is ready to run.
1159 vm_handle_hlt(struct vm *vm, int vcpuid, bool intr_disabled, bool *retu)
1163 int t, vcpu_halted, vm_halted;
1165 KASSERT(!CPU_ISSET(vcpuid, &vm->halted_cpus), ("vcpu already halted"));
1167 vcpu = &vm->vcpu[vcpuid];
1174 * Do a final check for pending NMI or interrupts before
1175 * really putting this thread to sleep. Also check for
1176 * software events that would cause this vcpu to wakeup.
1178 * These interrupts/events could have happened after the
1179 * vcpu returned from VMRUN() and before it acquired the
1182 if (vm->rendezvous_func != NULL || vm->suspend || vcpu->reqidle)
1184 if (vm_nmi_pending(vm, vcpuid))
1186 if (!intr_disabled) {
1187 if (vm_extint_pending(vm, vcpuid) ||
1188 vlapic_pending_intr(vcpu->vlapic, NULL)) {
1193 /* Don't go to sleep if the vcpu thread needs to yield */
1194 if (vcpu_should_yield(vm, vcpuid))
1198 * Some Linux guests implement "halt" by having all vcpus
1199 * execute HLT with interrupts disabled. 'halted_cpus' keeps
1200 * track of the vcpus that have entered this state. When all
1201 * vcpus enter the halted state the virtual machine is halted.
1203 if (intr_disabled) {
1205 VCPU_CTR0(vm, vcpuid, "Halted");
1206 if (!vcpu_halted && halt_detection_enabled) {
1208 CPU_SET_ATOMIC(vcpuid, &vm->halted_cpus);
1210 if (CPU_CMP(&vm->halted_cpus, &vm->active_cpus) == 0) {
1219 vcpu_require_state_locked(vm, vcpuid, VCPU_SLEEPING);
1221 * XXX msleep_spin() cannot be interrupted by signals so
1222 * wake up periodically to check pending signals.
1224 msleep_spin(vcpu, &vcpu->mtx, wmesg, hz);
1225 vcpu_require_state_locked(vm, vcpuid, VCPU_FROZEN);
1226 vmm_stat_incr(vm, vcpuid, VCPU_IDLE_TICKS, ticks - t);
1230 CPU_CLR_ATOMIC(vcpuid, &vm->halted_cpus);
1235 vm_suspend(vm, VM_SUSPEND_HALT);
1241 vm_handle_paging(struct vm *vm, int vcpuid, bool *retu)
1246 struct vm_exit *vme;
1248 vcpu = &vm->vcpu[vcpuid];
1249 vme = &vcpu->exitinfo;
1251 KASSERT(vme->inst_length == 0, ("%s: invalid inst_length %d",
1252 __func__, vme->inst_length));
1254 ftype = vme->u.paging.fault_type;
1255 KASSERT(ftype == VM_PROT_READ ||
1256 ftype == VM_PROT_WRITE || ftype == VM_PROT_EXECUTE,
1257 ("vm_handle_paging: invalid fault_type %d", ftype));
1259 if (ftype == VM_PROT_READ || ftype == VM_PROT_WRITE) {
1260 rv = pmap_emulate_accessed_dirty(vmspace_pmap(vm->vmspace),
1261 vme->u.paging.gpa, ftype);
1263 VCPU_CTR2(vm, vcpuid, "%s bit emulation for gpa %#lx",
1264 ftype == VM_PROT_READ ? "accessed" : "dirty",
1270 map = &vm->vmspace->vm_map;
1271 rv = vm_fault(map, vme->u.paging.gpa, ftype, VM_FAULT_NORMAL);
1273 VCPU_CTR3(vm, vcpuid, "vm_handle_paging rv = %d, gpa = %#lx, "
1274 "ftype = %d", rv, vme->u.paging.gpa, ftype);
1276 if (rv != KERN_SUCCESS)
1283 vm_handle_inst_emul(struct vm *vm, int vcpuid, bool *retu)
1287 struct vm_exit *vme;
1288 uint64_t gla, gpa, cs_base;
1289 struct vm_guest_paging *paging;
1290 mem_region_read_t mread;
1291 mem_region_write_t mwrite;
1292 enum vm_cpu_mode cpu_mode;
1293 int cs_d, error, fault;
1295 vcpu = &vm->vcpu[vcpuid];
1296 vme = &vcpu->exitinfo;
1298 KASSERT(vme->inst_length == 0, ("%s: invalid inst_length %d",
1299 __func__, vme->inst_length));
1301 gla = vme->u.inst_emul.gla;
1302 gpa = vme->u.inst_emul.gpa;
1303 cs_base = vme->u.inst_emul.cs_base;
1304 cs_d = vme->u.inst_emul.cs_d;
1305 vie = &vme->u.inst_emul.vie;
1306 paging = &vme->u.inst_emul.paging;
1307 cpu_mode = paging->cpu_mode;
1309 VCPU_CTR1(vm, vcpuid, "inst_emul fault accessing gpa %#lx", gpa);
1311 /* Fetch, decode and emulate the faulting instruction */
1312 if (vie->num_valid == 0) {
1313 error = vmm_fetch_instruction(vm, vcpuid, paging, vme->rip +
1314 cs_base, VIE_INST_SIZE, vie, &fault);
1317 * The instruction bytes have already been copied into 'vie'
1324 if (vmm_decode_instruction(vm, vcpuid, gla, cpu_mode, cs_d, vie) != 0) {
1325 VCPU_CTR1(vm, vcpuid, "Error decoding instruction at %#lx",
1326 vme->rip + cs_base);
1327 *retu = true; /* dump instruction bytes in userspace */
1332 * Update 'nextrip' based on the length of the emulated instruction.
1334 vme->inst_length = vie->num_processed;
1335 vcpu->nextrip += vie->num_processed;
1336 VCPU_CTR1(vm, vcpuid, "nextrip updated to %#lx after instruction "
1337 "decoding", vcpu->nextrip);
1339 /* return to userland unless this is an in-kernel emulated device */
1340 if (gpa >= DEFAULT_APIC_BASE && gpa < DEFAULT_APIC_BASE + PAGE_SIZE) {
1341 mread = lapic_mmio_read;
1342 mwrite = lapic_mmio_write;
1343 } else if (gpa >= VIOAPIC_BASE && gpa < VIOAPIC_BASE + VIOAPIC_SIZE) {
1344 mread = vioapic_mmio_read;
1345 mwrite = vioapic_mmio_write;
1346 } else if (gpa >= VHPET_BASE && gpa < VHPET_BASE + VHPET_SIZE) {
1347 mread = vhpet_mmio_read;
1348 mwrite = vhpet_mmio_write;
1354 error = vmm_emulate_instruction(vm, vcpuid, gpa, vie, paging,
1355 mread, mwrite, retu);
1361 vm_handle_suspend(struct vm *vm, int vcpuid, bool *retu)
1367 vcpu = &vm->vcpu[vcpuid];
1369 CPU_SET_ATOMIC(vcpuid, &vm->suspended_cpus);
1372 * Wait until all 'active_cpus' have suspended themselves.
1374 * Since a VM may be suspended at any time including when one or
1375 * more vcpus are doing a rendezvous we need to call the rendezvous
1376 * handler while we are waiting to prevent a deadlock.
1380 if (CPU_CMP(&vm->suspended_cpus, &vm->active_cpus) == 0) {
1381 VCPU_CTR0(vm, vcpuid, "All vcpus suspended");
1385 if (vm->rendezvous_func == NULL) {
1386 VCPU_CTR0(vm, vcpuid, "Sleeping during suspend");
1387 vcpu_require_state_locked(vm, vcpuid, VCPU_SLEEPING);
1388 msleep_spin(vcpu, &vcpu->mtx, "vmsusp", hz);
1389 vcpu_require_state_locked(vm, vcpuid, VCPU_FROZEN);
1391 VCPU_CTR0(vm, vcpuid, "Rendezvous during suspend");
1393 vm_handle_rendezvous(vm, vcpuid);
1400 * Wakeup the other sleeping vcpus and return to userspace.
1402 for (i = 0; i < VM_MAXCPU; i++) {
1403 if (CPU_ISSET(i, &vm->suspended_cpus)) {
1404 vcpu_notify_event(vm, i, false);
1413 vm_handle_reqidle(struct vm *vm, int vcpuid, bool *retu)
1415 struct vcpu *vcpu = &vm->vcpu[vcpuid];
1418 KASSERT(vcpu->reqidle, ("invalid vcpu reqidle %d", vcpu->reqidle));
1426 vm_suspend(struct vm *vm, enum vm_suspend_how how)
1430 if (how <= VM_SUSPEND_NONE || how >= VM_SUSPEND_LAST)
1433 if (atomic_cmpset_int(&vm->suspend, 0, how) == 0) {
1434 VM_CTR2(vm, "virtual machine already suspended %d/%d",
1439 VM_CTR1(vm, "virtual machine successfully suspended %d", how);
1442 * Notify all active vcpus that they are now suspended.
1444 for (i = 0; i < VM_MAXCPU; i++) {
1445 if (CPU_ISSET(i, &vm->active_cpus))
1446 vcpu_notify_event(vm, i, false);
1453 vm_exit_suspended(struct vm *vm, int vcpuid, uint64_t rip)
1455 struct vm_exit *vmexit;
1457 KASSERT(vm->suspend > VM_SUSPEND_NONE && vm->suspend < VM_SUSPEND_LAST,
1458 ("vm_exit_suspended: invalid suspend type %d", vm->suspend));
1460 vmexit = vm_exitinfo(vm, vcpuid);
1462 vmexit->inst_length = 0;
1463 vmexit->exitcode = VM_EXITCODE_SUSPENDED;
1464 vmexit->u.suspended.how = vm->suspend;
1468 vm_exit_rendezvous(struct vm *vm, int vcpuid, uint64_t rip)
1470 struct vm_exit *vmexit;
1472 KASSERT(vm->rendezvous_func != NULL, ("rendezvous not in progress"));
1474 vmexit = vm_exitinfo(vm, vcpuid);
1476 vmexit->inst_length = 0;
1477 vmexit->exitcode = VM_EXITCODE_RENDEZVOUS;
1478 vmm_stat_incr(vm, vcpuid, VMEXIT_RENDEZVOUS, 1);
1482 vm_exit_reqidle(struct vm *vm, int vcpuid, uint64_t rip)
1484 struct vm_exit *vmexit;
1486 vmexit = vm_exitinfo(vm, vcpuid);
1488 vmexit->inst_length = 0;
1489 vmexit->exitcode = VM_EXITCODE_REQIDLE;
1490 vmm_stat_incr(vm, vcpuid, VMEXIT_REQIDLE, 1);
1494 vm_exit_astpending(struct vm *vm, int vcpuid, uint64_t rip)
1496 struct vm_exit *vmexit;
1498 vmexit = vm_exitinfo(vm, vcpuid);
1500 vmexit->inst_length = 0;
1501 vmexit->exitcode = VM_EXITCODE_BOGUS;
1502 vmm_stat_incr(vm, vcpuid, VMEXIT_ASTPENDING, 1);
1506 vm_run(struct vm *vm, struct vm_run *vmrun)
1508 struct vm_eventinfo evinfo;
1513 struct vm_exit *vme;
1514 bool retu, intr_disabled;
1517 vcpuid = vmrun->cpuid;
1519 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
1522 if (!CPU_ISSET(vcpuid, &vm->active_cpus))
1525 if (CPU_ISSET(vcpuid, &vm->suspended_cpus))
1528 pmap = vmspace_pmap(vm->vmspace);
1529 vcpu = &vm->vcpu[vcpuid];
1530 vme = &vcpu->exitinfo;
1531 evinfo.rptr = &vm->rendezvous_func;
1532 evinfo.sptr = &vm->suspend;
1533 evinfo.iptr = &vcpu->reqidle;
1537 KASSERT(!CPU_ISSET(curcpu, &pmap->pm_active),
1538 ("vm_run: absurd pm_active"));
1542 pcb = PCPU_GET(curpcb);
1543 set_pcb_flags(pcb, PCB_FULL_IRET);
1545 restore_guest_fpustate(vcpu);
1547 vcpu_require_state(vm, vcpuid, VCPU_RUNNING);
1548 error = VMRUN(vm->cookie, vcpuid, vcpu->nextrip, pmap, &evinfo);
1549 vcpu_require_state(vm, vcpuid, VCPU_FROZEN);
1551 save_guest_fpustate(vcpu);
1553 vmm_stat_incr(vm, vcpuid, VCPU_TOTAL_RUNTIME, rdtsc() - tscval);
1559 vcpu->nextrip = vme->rip + vme->inst_length;
1560 switch (vme->exitcode) {
1561 case VM_EXITCODE_REQIDLE:
1562 error = vm_handle_reqidle(vm, vcpuid, &retu);
1564 case VM_EXITCODE_SUSPENDED:
1565 error = vm_handle_suspend(vm, vcpuid, &retu);
1567 case VM_EXITCODE_IOAPIC_EOI:
1568 vioapic_process_eoi(vm, vcpuid,
1569 vme->u.ioapic_eoi.vector);
1571 case VM_EXITCODE_RENDEZVOUS:
1572 vm_handle_rendezvous(vm, vcpuid);
1575 case VM_EXITCODE_HLT:
1576 intr_disabled = ((vme->u.hlt.rflags & PSL_I) == 0);
1577 error = vm_handle_hlt(vm, vcpuid, intr_disabled, &retu);
1579 case VM_EXITCODE_PAGING:
1580 error = vm_handle_paging(vm, vcpuid, &retu);
1582 case VM_EXITCODE_INST_EMUL:
1583 error = vm_handle_inst_emul(vm, vcpuid, &retu);
1585 case VM_EXITCODE_INOUT:
1586 case VM_EXITCODE_INOUT_STR:
1587 error = vm_handle_inout(vm, vcpuid, vme, &retu);
1589 case VM_EXITCODE_MONITOR:
1590 case VM_EXITCODE_MWAIT:
1591 vm_inject_ud(vm, vcpuid);
1594 retu = true; /* handled in userland */
1599 if (error == 0 && retu == false)
1602 VCPU_CTR2(vm, vcpuid, "retu %d/%d", error, vme->exitcode);
1604 /* copy the exit information */
1605 bcopy(vme, &vmrun->vm_exit, sizeof(struct vm_exit));
1610 vm_restart_instruction(void *arg, int vcpuid)
1614 enum vcpu_state state;
1619 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
1622 vcpu = &vm->vcpu[vcpuid];
1623 state = vcpu_get_state(vm, vcpuid, NULL);
1624 if (state == VCPU_RUNNING) {
1626 * When a vcpu is "running" the next instruction is determined
1627 * by adding 'rip' and 'inst_length' in the vcpu's 'exitinfo'.
1628 * Thus setting 'inst_length' to zero will cause the current
1629 * instruction to be restarted.
1631 vcpu->exitinfo.inst_length = 0;
1632 VCPU_CTR1(vm, vcpuid, "restarting instruction at %#lx by "
1633 "setting inst_length to zero", vcpu->exitinfo.rip);
1634 } else if (state == VCPU_FROZEN) {
1636 * When a vcpu is "frozen" it is outside the critical section
1637 * around VMRUN() and 'nextrip' points to the next instruction.
1638 * Thus instruction restart is achieved by setting 'nextrip'
1639 * to the vcpu's %rip.
1641 error = vm_get_register(vm, vcpuid, VM_REG_GUEST_RIP, &rip);
1642 KASSERT(!error, ("%s: error %d getting rip", __func__, error));
1643 VCPU_CTR2(vm, vcpuid, "restarting instruction by updating "
1644 "nextrip from %#lx to %#lx", vcpu->nextrip, rip);
1645 vcpu->nextrip = rip;
1647 panic("%s: invalid state %d", __func__, state);
1653 vm_exit_intinfo(struct vm *vm, int vcpuid, uint64_t info)
1658 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
1661 vcpu = &vm->vcpu[vcpuid];
1663 if (info & VM_INTINFO_VALID) {
1664 type = info & VM_INTINFO_TYPE;
1665 vector = info & 0xff;
1666 if (type == VM_INTINFO_NMI && vector != IDT_NMI)
1668 if (type == VM_INTINFO_HWEXCEPTION && vector >= 32)
1670 if (info & VM_INTINFO_RSVD)
1675 VCPU_CTR2(vm, vcpuid, "%s: info1(%#lx)", __func__, info);
1676 vcpu->exitintinfo = info;
1686 #define IDT_VE 20 /* Virtualization Exception (Intel specific) */
1688 static enum exc_class
1689 exception_class(uint64_t info)
1693 KASSERT(info & VM_INTINFO_VALID, ("intinfo must be valid: %#lx", info));
1694 type = info & VM_INTINFO_TYPE;
1695 vector = info & 0xff;
1697 /* Table 6-4, "Interrupt and Exception Classes", Intel SDM, Vol 3 */
1699 case VM_INTINFO_HWINTR:
1700 case VM_INTINFO_SWINTR:
1701 case VM_INTINFO_NMI:
1702 return (EXC_BENIGN);
1705 * Hardware exception.
1707 * SVM and VT-x use identical type values to represent NMI,
1708 * hardware interrupt and software interrupt.
1710 * SVM uses type '3' for all exceptions. VT-x uses type '3'
1711 * for exceptions except #BP and #OF. #BP and #OF use a type
1712 * value of '5' or '6'. Therefore we don't check for explicit
1713 * values of 'type' to classify 'intinfo' into a hardware
1722 return (EXC_PAGEFAULT);
1728 return (EXC_CONTRIBUTORY);
1730 return (EXC_BENIGN);
1735 nested_fault(struct vm *vm, int vcpuid, uint64_t info1, uint64_t info2,
1738 enum exc_class exc1, exc2;
1741 KASSERT(info1 & VM_INTINFO_VALID, ("info1 %#lx is not valid", info1));
1742 KASSERT(info2 & VM_INTINFO_VALID, ("info2 %#lx is not valid", info2));
1745 * If an exception occurs while attempting to call the double-fault
1746 * handler the processor enters shutdown mode (aka triple fault).
1748 type1 = info1 & VM_INTINFO_TYPE;
1749 vector1 = info1 & 0xff;
1750 if (type1 == VM_INTINFO_HWEXCEPTION && vector1 == IDT_DF) {
1751 VCPU_CTR2(vm, vcpuid, "triple fault: info1(%#lx), info2(%#lx)",
1753 vm_suspend(vm, VM_SUSPEND_TRIPLEFAULT);
1759 * Table 6-5 "Conditions for Generating a Double Fault", Intel SDM, Vol3
1761 exc1 = exception_class(info1);
1762 exc2 = exception_class(info2);
1763 if ((exc1 == EXC_CONTRIBUTORY && exc2 == EXC_CONTRIBUTORY) ||
1764 (exc1 == EXC_PAGEFAULT && exc2 != EXC_BENIGN)) {
1765 /* Convert nested fault into a double fault. */
1767 *retinfo |= VM_INTINFO_VALID | VM_INTINFO_HWEXCEPTION;
1768 *retinfo |= VM_INTINFO_DEL_ERRCODE;
1770 /* Handle exceptions serially */
1777 vcpu_exception_intinfo(struct vcpu *vcpu)
1781 if (vcpu->exception_pending) {
1782 info = vcpu->exc_vector & 0xff;
1783 info |= VM_INTINFO_VALID | VM_INTINFO_HWEXCEPTION;
1784 if (vcpu->exc_errcode_valid) {
1785 info |= VM_INTINFO_DEL_ERRCODE;
1786 info |= (uint64_t)vcpu->exc_errcode << 32;
1793 vm_entry_intinfo(struct vm *vm, int vcpuid, uint64_t *retinfo)
1796 uint64_t info1, info2;
1799 KASSERT(vcpuid >= 0 && vcpuid < VM_MAXCPU, ("invalid vcpu %d", vcpuid));
1801 vcpu = &vm->vcpu[vcpuid];
1803 info1 = vcpu->exitintinfo;
1804 vcpu->exitintinfo = 0;
1807 if (vcpu->exception_pending) {
1808 info2 = vcpu_exception_intinfo(vcpu);
1809 vcpu->exception_pending = 0;
1810 VCPU_CTR2(vm, vcpuid, "Exception %d delivered: %#lx",
1811 vcpu->exc_vector, info2);
1814 if ((info1 & VM_INTINFO_VALID) && (info2 & VM_INTINFO_VALID)) {
1815 valid = nested_fault(vm, vcpuid, info1, info2, retinfo);
1816 } else if (info1 & VM_INTINFO_VALID) {
1819 } else if (info2 & VM_INTINFO_VALID) {
1827 VCPU_CTR4(vm, vcpuid, "%s: info1(%#lx), info2(%#lx), "
1828 "retinfo(%#lx)", __func__, info1, info2, *retinfo);
1835 vm_get_intinfo(struct vm *vm, int vcpuid, uint64_t *info1, uint64_t *info2)
1839 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
1842 vcpu = &vm->vcpu[vcpuid];
1843 *info1 = vcpu->exitintinfo;
1844 *info2 = vcpu_exception_intinfo(vcpu);
1849 vm_inject_exception(struct vm *vm, int vcpuid, int vector, int errcode_valid,
1850 uint32_t errcode, int restart_instruction)
1856 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
1859 if (vector < 0 || vector >= 32)
1863 * A double fault exception should never be injected directly into
1864 * the guest. It is a derived exception that results from specific
1865 * combinations of nested faults.
1867 if (vector == IDT_DF)
1870 vcpu = &vm->vcpu[vcpuid];
1872 if (vcpu->exception_pending) {
1873 VCPU_CTR2(vm, vcpuid, "Unable to inject exception %d due to "
1874 "pending exception %d", vector, vcpu->exc_vector);
1878 if (errcode_valid) {
1880 * Exceptions don't deliver an error code in real mode.
1882 error = vm_get_register(vm, vcpuid, VM_REG_GUEST_CR0, ®val);
1883 KASSERT(!error, ("%s: error %d getting CR0", __func__, error));
1884 if (!(regval & CR0_PE))
1889 * From section 26.6.1 "Interruptibility State" in Intel SDM:
1891 * Event blocking by "STI" or "MOV SS" is cleared after guest executes
1892 * one instruction or incurs an exception.
1894 error = vm_set_register(vm, vcpuid, VM_REG_GUEST_INTR_SHADOW, 0);
1895 KASSERT(error == 0, ("%s: error %d clearing interrupt shadow",
1898 if (restart_instruction)
1899 vm_restart_instruction(vm, vcpuid);
1901 vcpu->exception_pending = 1;
1902 vcpu->exc_vector = vector;
1903 vcpu->exc_errcode = errcode;
1904 vcpu->exc_errcode_valid = errcode_valid;
1905 VCPU_CTR1(vm, vcpuid, "Exception %d pending", vector);
1910 vm_inject_fault(void *vmarg, int vcpuid, int vector, int errcode_valid,
1914 int error, restart_instruction;
1917 restart_instruction = 1;
1919 error = vm_inject_exception(vm, vcpuid, vector, errcode_valid,
1920 errcode, restart_instruction);
1921 KASSERT(error == 0, ("vm_inject_exception error %d", error));
1925 vm_inject_pf(void *vmarg, int vcpuid, int error_code, uint64_t cr2)
1931 VCPU_CTR2(vm, vcpuid, "Injecting page fault: error_code %#x, cr2 %#lx",
1934 error = vm_set_register(vm, vcpuid, VM_REG_GUEST_CR2, cr2);
1935 KASSERT(error == 0, ("vm_set_register(cr2) error %d", error));
1937 vm_inject_fault(vm, vcpuid, IDT_PF, 1, error_code);
1940 static VMM_STAT(VCPU_NMI_COUNT, "number of NMIs delivered to vcpu");
1943 vm_inject_nmi(struct vm *vm, int vcpuid)
1947 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
1950 vcpu = &vm->vcpu[vcpuid];
1952 vcpu->nmi_pending = 1;
1953 vcpu_notify_event(vm, vcpuid, false);
1958 vm_nmi_pending(struct vm *vm, int vcpuid)
1962 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
1963 panic("vm_nmi_pending: invalid vcpuid %d", vcpuid);
1965 vcpu = &vm->vcpu[vcpuid];
1967 return (vcpu->nmi_pending);
1971 vm_nmi_clear(struct vm *vm, int vcpuid)
1975 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
1976 panic("vm_nmi_pending: invalid vcpuid %d", vcpuid);
1978 vcpu = &vm->vcpu[vcpuid];
1980 if (vcpu->nmi_pending == 0)
1981 panic("vm_nmi_clear: inconsistent nmi_pending state");
1983 vcpu->nmi_pending = 0;
1984 vmm_stat_incr(vm, vcpuid, VCPU_NMI_COUNT, 1);
1987 static VMM_STAT(VCPU_EXTINT_COUNT, "number of ExtINTs delivered to vcpu");
1990 vm_inject_extint(struct vm *vm, int vcpuid)
1994 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
1997 vcpu = &vm->vcpu[vcpuid];
1999 vcpu->extint_pending = 1;
2000 vcpu_notify_event(vm, vcpuid, false);
2005 vm_extint_pending(struct vm *vm, int vcpuid)
2009 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2010 panic("vm_extint_pending: invalid vcpuid %d", vcpuid);
2012 vcpu = &vm->vcpu[vcpuid];
2014 return (vcpu->extint_pending);
2018 vm_extint_clear(struct vm *vm, int vcpuid)
2022 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2023 panic("vm_extint_pending: invalid vcpuid %d", vcpuid);
2025 vcpu = &vm->vcpu[vcpuid];
2027 if (vcpu->extint_pending == 0)
2028 panic("vm_extint_clear: inconsistent extint_pending state");
2030 vcpu->extint_pending = 0;
2031 vmm_stat_incr(vm, vcpuid, VCPU_EXTINT_COUNT, 1);
2035 vm_get_capability(struct vm *vm, int vcpu, int type, int *retval)
2037 if (vcpu < 0 || vcpu >= VM_MAXCPU)
2040 if (type < 0 || type >= VM_CAP_MAX)
2043 return (VMGETCAP(vm->cookie, vcpu, type, retval));
2047 vm_set_capability(struct vm *vm, int vcpu, int type, int val)
2049 if (vcpu < 0 || vcpu >= VM_MAXCPU)
2052 if (type < 0 || type >= VM_CAP_MAX)
2055 return (VMSETCAP(vm->cookie, vcpu, type, val));
2059 vm_lapic(struct vm *vm, int cpu)
2061 return (vm->vcpu[cpu].vlapic);
2065 vm_ioapic(struct vm *vm)
2068 return (vm->vioapic);
2072 vm_hpet(struct vm *vm)
2079 vmm_is_pptdev(int bus, int slot, int func)
2083 char *val, *cp, *cp2;
2087 * The length of an environment variable is limited to 128 bytes which
2088 * puts an upper limit on the number of passthru devices that may be
2089 * specified using a single environment variable.
2091 * Work around this by scanning multiple environment variable
2092 * names instead of a single one - yuck!
2094 const char *names[] = { "pptdevs", "pptdevs2", "pptdevs3", NULL };
2096 /* set pptdevs="1/2/3 4/5/6 7/8/9 10/11/12" */
2098 for (i = 0; names[i] != NULL && !found; i++) {
2099 cp = val = kern_getenv(names[i]);
2100 while (cp != NULL && *cp != '\0') {
2101 if ((cp2 = strchr(cp, ' ')) != NULL)
2104 n = sscanf(cp, "%d/%d/%d", &b, &s, &f);
2105 if (n == 3 && bus == b && slot == s && func == f) {
2121 vm_iommu_domain(struct vm *vm)
2128 vcpu_set_state(struct vm *vm, int vcpuid, enum vcpu_state newstate,
2134 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2135 panic("vm_set_run_state: invalid vcpuid %d", vcpuid);
2137 vcpu = &vm->vcpu[vcpuid];
2140 error = vcpu_set_state_locked(vm, vcpuid, newstate, from_idle);
2147 vcpu_get_state(struct vm *vm, int vcpuid, int *hostcpu)
2150 enum vcpu_state state;
2152 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2153 panic("vm_get_run_state: invalid vcpuid %d", vcpuid);
2155 vcpu = &vm->vcpu[vcpuid];
2158 state = vcpu->state;
2159 if (hostcpu != NULL)
2160 *hostcpu = vcpu->hostcpu;
2167 vm_activate_cpu(struct vm *vm, int vcpuid)
2170 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2173 if (CPU_ISSET(vcpuid, &vm->active_cpus))
2176 VCPU_CTR0(vm, vcpuid, "activated");
2177 CPU_SET_ATOMIC(vcpuid, &vm->active_cpus);
2182 vm_active_cpus(struct vm *vm)
2185 return (vm->active_cpus);
2189 vm_suspended_cpus(struct vm *vm)
2192 return (vm->suspended_cpus);
2196 vcpu_stats(struct vm *vm, int vcpuid)
2199 return (vm->vcpu[vcpuid].stats);
2203 vm_get_x2apic_state(struct vm *vm, int vcpuid, enum x2apic_state *state)
2205 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2208 *state = vm->vcpu[vcpuid].x2apic_state;
2214 vm_set_x2apic_state(struct vm *vm, int vcpuid, enum x2apic_state state)
2216 if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
2219 if (state >= X2APIC_STATE_LAST)
2222 vm->vcpu[vcpuid].x2apic_state = state;
2224 vlapic_set_x2apic_state(vm, vcpuid, state);
2230 * This function is called to ensure that a vcpu "sees" a pending event
2231 * as soon as possible:
2232 * - If the vcpu thread is sleeping then it is woken up.
2233 * - If the vcpu is running on a different host_cpu then an IPI will be directed
2234 * to the host_cpu to cause the vcpu to trap into the hypervisor.
2237 vcpu_notify_event_locked(struct vcpu *vcpu, bool lapic_intr)
2241 hostcpu = vcpu->hostcpu;
2242 if (vcpu->state == VCPU_RUNNING) {
2243 KASSERT(hostcpu != NOCPU, ("vcpu running on invalid hostcpu"));
2244 if (hostcpu != curcpu) {
2246 vlapic_post_intr(vcpu->vlapic, hostcpu,
2249 ipi_cpu(hostcpu, vmm_ipinum);
2253 * If the 'vcpu' is running on 'curcpu' then it must
2254 * be sending a notification to itself (e.g. SELF_IPI).
2255 * The pending event will be picked up when the vcpu
2256 * transitions back to guest context.
2260 KASSERT(hostcpu == NOCPU, ("vcpu state %d not consistent "
2261 "with hostcpu %d", vcpu->state, hostcpu));
2262 if (vcpu->state == VCPU_SLEEPING)
2268 vcpu_notify_event(struct vm *vm, int vcpuid, bool lapic_intr)
2270 struct vcpu *vcpu = &vm->vcpu[vcpuid];
2273 vcpu_notify_event_locked(vcpu, lapic_intr);
2278 vm_get_vmspace(struct vm *vm)
2281 return (vm->vmspace);
2285 vm_apicid2vcpuid(struct vm *vm, int apicid)
2288 * XXX apic id is assumed to be numerically identical to vcpu id
2294 vm_smp_rendezvous(struct vm *vm, int vcpuid, cpuset_t dest,
2295 vm_rendezvous_func_t func, void *arg)
2300 * Enforce that this function is called without any locks
2302 WITNESS_WARN(WARN_PANIC, NULL, "vm_smp_rendezvous");
2303 KASSERT(vcpuid == -1 || (vcpuid >= 0 && vcpuid < VM_MAXCPU),
2304 ("vm_smp_rendezvous: invalid vcpuid %d", vcpuid));
2307 mtx_lock(&vm->rendezvous_mtx);
2308 if (vm->rendezvous_func != NULL) {
2310 * If a rendezvous is already in progress then we need to
2311 * call the rendezvous handler in case this 'vcpuid' is one
2312 * of the targets of the rendezvous.
2314 RENDEZVOUS_CTR0(vm, vcpuid, "Rendezvous already in progress");
2315 mtx_unlock(&vm->rendezvous_mtx);
2316 vm_handle_rendezvous(vm, vcpuid);
2319 KASSERT(vm->rendezvous_func == NULL, ("vm_smp_rendezvous: previous "
2320 "rendezvous is still in progress"));
2322 RENDEZVOUS_CTR0(vm, vcpuid, "Initiating rendezvous");
2323 vm->rendezvous_req_cpus = dest;
2324 CPU_ZERO(&vm->rendezvous_done_cpus);
2325 vm->rendezvous_arg = arg;
2326 vm_set_rendezvous_func(vm, func);
2327 mtx_unlock(&vm->rendezvous_mtx);
2330 * Wake up any sleeping vcpus and trigger a VM-exit in any running
2331 * vcpus so they handle the rendezvous as soon as possible.
2333 for (i = 0; i < VM_MAXCPU; i++) {
2334 if (CPU_ISSET(i, &dest))
2335 vcpu_notify_event(vm, i, false);
2338 vm_handle_rendezvous(vm, vcpuid);
2342 vm_atpic(struct vm *vm)
2344 return (vm->vatpic);
2348 vm_atpit(struct vm *vm)
2350 return (vm->vatpit);
2354 vm_pmtmr(struct vm *vm)
2357 return (vm->vpmtmr);
2361 vm_rtc(struct vm *vm)
2368 vm_segment_name(int seg)
2370 static enum vm_reg_name seg_names[] = {
2379 KASSERT(seg >= 0 && seg < nitems(seg_names),
2380 ("%s: invalid segment encoding %d", __func__, seg));
2381 return (seg_names[seg]);
2385 vm_copy_teardown(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo,
2390 for (idx = 0; idx < num_copyinfo; idx++) {
2391 if (copyinfo[idx].cookie != NULL)
2392 vm_gpa_release(copyinfo[idx].cookie);
2394 bzero(copyinfo, num_copyinfo * sizeof(struct vm_copyinfo));
2398 vm_copy_setup(struct vm *vm, int vcpuid, struct vm_guest_paging *paging,
2399 uint64_t gla, size_t len, int prot, struct vm_copyinfo *copyinfo,
2400 int num_copyinfo, int *fault)
2402 int error, idx, nused;
2403 size_t n, off, remaining;
2407 bzero(copyinfo, sizeof(struct vm_copyinfo) * num_copyinfo);
2411 while (remaining > 0) {
2412 KASSERT(nused < num_copyinfo, ("insufficient vm_copyinfo"));
2413 error = vm_gla2gpa(vm, vcpuid, paging, gla, prot, &gpa, fault);
2414 if (error || *fault)
2416 off = gpa & PAGE_MASK;
2417 n = min(remaining, PAGE_SIZE - off);
2418 copyinfo[nused].gpa = gpa;
2419 copyinfo[nused].len = n;
2425 for (idx = 0; idx < nused; idx++) {
2426 hva = vm_gpa_hold(vm, copyinfo[idx].gpa, copyinfo[idx].len,
2430 copyinfo[idx].hva = hva;
2431 copyinfo[idx].cookie = cookie;
2435 vm_copy_teardown(vm, vcpuid, copyinfo, num_copyinfo);
2444 vm_copyin(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo, void *kaddr,
2453 bcopy(copyinfo[idx].hva, dst, copyinfo[idx].len);
2454 len -= copyinfo[idx].len;
2455 dst += copyinfo[idx].len;
2461 vm_copyout(struct vm *vm, int vcpuid, const void *kaddr,
2462 struct vm_copyinfo *copyinfo, size_t len)
2470 bcopy(src, copyinfo[idx].hva, copyinfo[idx].len);
2471 len -= copyinfo[idx].len;
2472 src += copyinfo[idx].len;
2478 * Return the amount of in-use and wired memory for the VM. Since
2479 * these are global stats, only return the values with for vCPU 0
2481 VMM_STAT_DECLARE(VMM_MEM_RESIDENT);
2482 VMM_STAT_DECLARE(VMM_MEM_WIRED);
2485 vm_get_rescnt(struct vm *vm, int vcpu, struct vmm_stat_type *stat)
2489 vmm_stat_set(vm, vcpu, VMM_MEM_RESIDENT,
2490 PAGE_SIZE * vmspace_resident_count(vm->vmspace));
2495 vm_get_wiredcnt(struct vm *vm, int vcpu, struct vmm_stat_type *stat)
2499 vmm_stat_set(vm, vcpu, VMM_MEM_WIRED,
2500 PAGE_SIZE * pmap_wired_count(vmspace_pmap(vm->vmspace)));
2504 VMM_STAT_FUNC(VMM_MEM_RESIDENT, "Resident memory", vm_get_rescnt);
2505 VMM_STAT_FUNC(VMM_MEM_WIRED, "Wired memory", vm_get_wiredcnt);