f81459bd83
undefined instruction exception. Previously we would exit the guest, however an unprivileged user could execute these. Found with: syzkaller Reviewed by: araujo, tychon (previous version) Approved by: re (kib) MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D17192
2712 lines
62 KiB
C
2712 lines
62 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2011 NetApp, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/sysctl.h>
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#include <sys/malloc.h>
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#include <sys/pcpu.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/rwlock.h>
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#include <sys/sched.h>
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#include <sys/smp.h>
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#include <sys/systm.h>
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#include <vm/vm.h>
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#include <vm/vm_object.h>
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#include <vm/vm_page.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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#include <vm/vm_extern.h>
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#include <vm/vm_param.h>
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#include <machine/cpu.h>
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#include <machine/pcb.h>
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#include <machine/smp.h>
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#include <machine/md_var.h>
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#include <x86/psl.h>
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#include <x86/apicreg.h>
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#include <machine/vmm.h>
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#include <machine/vmm_dev.h>
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#include <machine/vmm_instruction_emul.h>
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#include "vmm_ioport.h"
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#include "vmm_ktr.h"
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#include "vmm_host.h"
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#include "vmm_mem.h"
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#include "vmm_util.h"
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#include "vatpic.h"
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#include "vatpit.h"
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#include "vhpet.h"
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#include "vioapic.h"
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#include "vlapic.h"
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#include "vpmtmr.h"
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#include "vrtc.h"
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#include "vmm_stat.h"
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#include "vmm_lapic.h"
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#include "io/ppt.h"
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#include "io/iommu.h"
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struct vlapic;
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/*
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* Initialization:
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* (a) allocated when vcpu is created
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* (i) initialized when vcpu is created and when it is reinitialized
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* (o) initialized the first time the vcpu is created
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* (x) initialized before use
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*/
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struct vcpu {
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struct mtx mtx; /* (o) protects 'state' and 'hostcpu' */
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enum vcpu_state state; /* (o) vcpu state */
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int hostcpu; /* (o) vcpu's host cpu */
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int reqidle; /* (i) request vcpu to idle */
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struct vlapic *vlapic; /* (i) APIC device model */
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enum x2apic_state x2apic_state; /* (i) APIC mode */
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uint64_t exitintinfo; /* (i) events pending at VM exit */
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int nmi_pending; /* (i) NMI pending */
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int extint_pending; /* (i) INTR pending */
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int exception_pending; /* (i) exception pending */
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int exc_vector; /* (x) exception collateral */
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int exc_errcode_valid;
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uint32_t exc_errcode;
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struct savefpu *guestfpu; /* (a,i) guest fpu state */
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uint64_t guest_xcr0; /* (i) guest %xcr0 register */
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void *stats; /* (a,i) statistics */
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struct vm_exit exitinfo; /* (x) exit reason and collateral */
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uint64_t nextrip; /* (x) next instruction to execute */
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};
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#define vcpu_lock_initialized(v) mtx_initialized(&((v)->mtx))
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#define vcpu_lock_init(v) mtx_init(&((v)->mtx), "vcpu lock", 0, MTX_SPIN)
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#define vcpu_lock(v) mtx_lock_spin(&((v)->mtx))
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#define vcpu_unlock(v) mtx_unlock_spin(&((v)->mtx))
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#define vcpu_assert_locked(v) mtx_assert(&((v)->mtx), MA_OWNED)
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struct mem_seg {
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size_t len;
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bool sysmem;
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struct vm_object *object;
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};
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#define VM_MAX_MEMSEGS 3
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struct mem_map {
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vm_paddr_t gpa;
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size_t len;
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vm_ooffset_t segoff;
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int segid;
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int prot;
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int flags;
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};
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#define VM_MAX_MEMMAPS 4
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/*
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* Initialization:
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* (o) initialized the first time the VM is created
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* (i) initialized when VM is created and when it is reinitialized
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* (x) initialized before use
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*/
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struct vm {
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void *cookie; /* (i) cpu-specific data */
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void *iommu; /* (x) iommu-specific data */
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struct vhpet *vhpet; /* (i) virtual HPET */
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struct vioapic *vioapic; /* (i) virtual ioapic */
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struct vatpic *vatpic; /* (i) virtual atpic */
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struct vatpit *vatpit; /* (i) virtual atpit */
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struct vpmtmr *vpmtmr; /* (i) virtual ACPI PM timer */
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struct vrtc *vrtc; /* (o) virtual RTC */
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volatile cpuset_t active_cpus; /* (i) active vcpus */
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volatile cpuset_t debug_cpus; /* (i) vcpus stopped for debug */
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int suspend; /* (i) stop VM execution */
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volatile cpuset_t suspended_cpus; /* (i) suspended vcpus */
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volatile cpuset_t halted_cpus; /* (x) cpus in a hard halt */
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cpuset_t rendezvous_req_cpus; /* (x) rendezvous requested */
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cpuset_t rendezvous_done_cpus; /* (x) rendezvous finished */
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void *rendezvous_arg; /* (x) rendezvous func/arg */
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vm_rendezvous_func_t rendezvous_func;
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struct mtx rendezvous_mtx; /* (o) rendezvous lock */
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struct mem_map mem_maps[VM_MAX_MEMMAPS]; /* (i) guest address space */
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struct mem_seg mem_segs[VM_MAX_MEMSEGS]; /* (o) guest memory regions */
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struct vmspace *vmspace; /* (o) guest's address space */
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char name[VM_MAX_NAMELEN]; /* (o) virtual machine name */
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struct vcpu vcpu[VM_MAXCPU]; /* (i) guest vcpus */
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/* The following describe the vm cpu topology */
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uint16_t sockets; /* (o) num of sockets */
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uint16_t cores; /* (o) num of cores/socket */
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uint16_t threads; /* (o) num of threads/core */
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uint16_t maxcpus; /* (o) max pluggable cpus */
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};
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static int vmm_initialized;
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static struct vmm_ops *ops;
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#define VMM_INIT(num) (ops != NULL ? (*ops->init)(num) : 0)
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#define VMM_CLEANUP() (ops != NULL ? (*ops->cleanup)() : 0)
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#define VMM_RESUME() (ops != NULL ? (*ops->resume)() : 0)
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#define VMINIT(vm, pmap) (ops != NULL ? (*ops->vminit)(vm, pmap): NULL)
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#define VMRUN(vmi, vcpu, rip, pmap, evinfo) \
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(ops != NULL ? (*ops->vmrun)(vmi, vcpu, rip, pmap, evinfo) : ENXIO)
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#define VMCLEANUP(vmi) (ops != NULL ? (*ops->vmcleanup)(vmi) : NULL)
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#define VMSPACE_ALLOC(min, max) \
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(ops != NULL ? (*ops->vmspace_alloc)(min, max) : NULL)
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#define VMSPACE_FREE(vmspace) \
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(ops != NULL ? (*ops->vmspace_free)(vmspace) : ENXIO)
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#define VMGETREG(vmi, vcpu, num, retval) \
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(ops != NULL ? (*ops->vmgetreg)(vmi, vcpu, num, retval) : ENXIO)
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#define VMSETREG(vmi, vcpu, num, val) \
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(ops != NULL ? (*ops->vmsetreg)(vmi, vcpu, num, val) : ENXIO)
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#define VMGETDESC(vmi, vcpu, num, desc) \
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(ops != NULL ? (*ops->vmgetdesc)(vmi, vcpu, num, desc) : ENXIO)
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#define VMSETDESC(vmi, vcpu, num, desc) \
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(ops != NULL ? (*ops->vmsetdesc)(vmi, vcpu, num, desc) : ENXIO)
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#define VMGETCAP(vmi, vcpu, num, retval) \
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(ops != NULL ? (*ops->vmgetcap)(vmi, vcpu, num, retval) : ENXIO)
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#define VMSETCAP(vmi, vcpu, num, val) \
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(ops != NULL ? (*ops->vmsetcap)(vmi, vcpu, num, val) : ENXIO)
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#define VLAPIC_INIT(vmi, vcpu) \
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(ops != NULL ? (*ops->vlapic_init)(vmi, vcpu) : NULL)
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#define VLAPIC_CLEANUP(vmi, vlapic) \
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(ops != NULL ? (*ops->vlapic_cleanup)(vmi, vlapic) : NULL)
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#define fpu_start_emulating() load_cr0(rcr0() | CR0_TS)
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#define fpu_stop_emulating() clts()
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SDT_PROVIDER_DEFINE(vmm);
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static MALLOC_DEFINE(M_VM, "vm", "vm");
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/* statistics */
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static VMM_STAT(VCPU_TOTAL_RUNTIME, "vcpu total runtime");
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SYSCTL_NODE(_hw, OID_AUTO, vmm, CTLFLAG_RW, NULL, NULL);
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/*
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* Halt the guest if all vcpus are executing a HLT instruction with
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* interrupts disabled.
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*/
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static int halt_detection_enabled = 1;
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SYSCTL_INT(_hw_vmm, OID_AUTO, halt_detection, CTLFLAG_RDTUN,
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&halt_detection_enabled, 0,
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"Halt VM if all vcpus execute HLT with interrupts disabled");
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static int vmm_ipinum;
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SYSCTL_INT(_hw_vmm, OID_AUTO, ipinum, CTLFLAG_RD, &vmm_ipinum, 0,
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"IPI vector used for vcpu notifications");
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static int trace_guest_exceptions;
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SYSCTL_INT(_hw_vmm, OID_AUTO, trace_guest_exceptions, CTLFLAG_RDTUN,
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&trace_guest_exceptions, 0,
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"Trap into hypervisor on all guest exceptions and reflect them back");
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static void vm_free_memmap(struct vm *vm, int ident);
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static bool sysmem_mapping(struct vm *vm, struct mem_map *mm);
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static void vcpu_notify_event_locked(struct vcpu *vcpu, bool lapic_intr);
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#ifdef KTR
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static const char *
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vcpu_state2str(enum vcpu_state state)
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{
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switch (state) {
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case VCPU_IDLE:
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return ("idle");
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case VCPU_FROZEN:
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return ("frozen");
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case VCPU_RUNNING:
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return ("running");
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case VCPU_SLEEPING:
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return ("sleeping");
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default:
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return ("unknown");
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}
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}
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#endif
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static void
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vcpu_cleanup(struct vm *vm, int i, bool destroy)
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{
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struct vcpu *vcpu = &vm->vcpu[i];
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VLAPIC_CLEANUP(vm->cookie, vcpu->vlapic);
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if (destroy) {
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vmm_stat_free(vcpu->stats);
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fpu_save_area_free(vcpu->guestfpu);
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}
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}
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static void
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vcpu_init(struct vm *vm, int vcpu_id, bool create)
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{
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struct vcpu *vcpu;
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KASSERT(vcpu_id >= 0 && vcpu_id < VM_MAXCPU,
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("vcpu_init: invalid vcpu %d", vcpu_id));
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vcpu = &vm->vcpu[vcpu_id];
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if (create) {
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KASSERT(!vcpu_lock_initialized(vcpu), ("vcpu %d already "
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"initialized", vcpu_id));
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vcpu_lock_init(vcpu);
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vcpu->state = VCPU_IDLE;
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vcpu->hostcpu = NOCPU;
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vcpu->guestfpu = fpu_save_area_alloc();
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vcpu->stats = vmm_stat_alloc();
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}
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vcpu->vlapic = VLAPIC_INIT(vm->cookie, vcpu_id);
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vm_set_x2apic_state(vm, vcpu_id, X2APIC_DISABLED);
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vcpu->reqidle = 0;
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vcpu->exitintinfo = 0;
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vcpu->nmi_pending = 0;
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vcpu->extint_pending = 0;
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vcpu->exception_pending = 0;
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vcpu->guest_xcr0 = XFEATURE_ENABLED_X87;
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fpu_save_area_reset(vcpu->guestfpu);
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vmm_stat_init(vcpu->stats);
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}
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int
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vcpu_trace_exceptions(struct vm *vm, int vcpuid)
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{
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return (trace_guest_exceptions);
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}
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struct vm_exit *
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vm_exitinfo(struct vm *vm, int cpuid)
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{
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struct vcpu *vcpu;
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if (cpuid < 0 || cpuid >= VM_MAXCPU)
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panic("vm_exitinfo: invalid cpuid %d", cpuid);
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vcpu = &vm->vcpu[cpuid];
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return (&vcpu->exitinfo);
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}
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static void
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vmm_resume(void)
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{
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VMM_RESUME();
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}
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static int
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vmm_init(void)
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{
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int error;
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vmm_host_state_init();
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vmm_ipinum = lapic_ipi_alloc(pti ? &IDTVEC(justreturn1_pti) :
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&IDTVEC(justreturn));
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if (vmm_ipinum < 0)
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vmm_ipinum = IPI_AST;
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error = vmm_mem_init();
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if (error)
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return (error);
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if (vmm_is_intel())
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ops = &vmm_ops_intel;
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else if (vmm_is_amd())
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ops = &vmm_ops_amd;
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else
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return (ENXIO);
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vmm_resume_p = vmm_resume;
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return (VMM_INIT(vmm_ipinum));
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}
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static int
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vmm_handler(module_t mod, int what, void *arg)
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{
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int error;
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switch (what) {
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case MOD_LOAD:
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vmmdev_init();
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error = vmm_init();
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if (error == 0)
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vmm_initialized = 1;
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break;
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case MOD_UNLOAD:
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error = vmmdev_cleanup();
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if (error == 0) {
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vmm_resume_p = NULL;
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iommu_cleanup();
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if (vmm_ipinum != IPI_AST)
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lapic_ipi_free(vmm_ipinum);
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error = VMM_CLEANUP();
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/*
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* Something bad happened - prevent new
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* VMs from being created
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*/
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if (error)
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vmm_initialized = 0;
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}
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break;
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default:
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error = 0;
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break;
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}
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return (error);
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}
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static moduledata_t vmm_kmod = {
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"vmm",
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vmm_handler,
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NULL
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};
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/*
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* vmm initialization has the following dependencies:
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*
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* - VT-x initialization requires smp_rendezvous() and therefore must happen
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* after SMP is fully functional (after SI_SUB_SMP).
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*/
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DECLARE_MODULE(vmm, vmm_kmod, SI_SUB_SMP + 1, SI_ORDER_ANY);
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MODULE_VERSION(vmm, 1);
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static void
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vm_init(struct vm *vm, bool create)
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{
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int i;
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vm->cookie = VMINIT(vm, vmspace_pmap(vm->vmspace));
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vm->iommu = NULL;
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vm->vioapic = vioapic_init(vm);
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vm->vhpet = vhpet_init(vm);
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vm->vatpic = vatpic_init(vm);
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vm->vatpit = vatpit_init(vm);
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vm->vpmtmr = vpmtmr_init(vm);
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if (create)
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vm->vrtc = vrtc_init(vm);
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CPU_ZERO(&vm->active_cpus);
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CPU_ZERO(&vm->debug_cpus);
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vm->suspend = 0;
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CPU_ZERO(&vm->suspended_cpus);
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for (i = 0; i < VM_MAXCPU; i++)
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vcpu_init(vm, i, create);
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}
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/*
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* The default CPU topology is a single thread per package.
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*/
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u_int cores_per_package = 1;
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u_int threads_per_core = 1;
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int
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vm_create(const char *name, struct vm **retvm)
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{
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struct vm *vm;
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struct vmspace *vmspace;
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/*
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* If vmm.ko could not be successfully initialized then don't attempt
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* to create the virtual machine.
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*/
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if (!vmm_initialized)
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return (ENXIO);
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if (name == NULL || strlen(name) >= VM_MAX_NAMELEN)
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return (EINVAL);
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vmspace = VMSPACE_ALLOC(0, VM_MAXUSER_ADDRESS);
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if (vmspace == NULL)
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return (ENOMEM);
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vm = malloc(sizeof(struct vm), M_VM, M_WAITOK | M_ZERO);
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strcpy(vm->name, name);
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vm->vmspace = vmspace;
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mtx_init(&vm->rendezvous_mtx, "vm rendezvous lock", 0, MTX_DEF);
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vm->sockets = 1;
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vm->cores = cores_per_package; /* XXX backwards compatibility */
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vm->threads = threads_per_core; /* XXX backwards compatibility */
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|
vm->maxcpus = 0; /* XXX not implemented */
|
|
|
|
vm_init(vm, true);
|
|
|
|
*retvm = vm;
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
vm_get_topology(struct vm *vm, uint16_t *sockets, uint16_t *cores,
|
|
uint16_t *threads, uint16_t *maxcpus)
|
|
{
|
|
*sockets = vm->sockets;
|
|
*cores = vm->cores;
|
|
*threads = vm->threads;
|
|
*maxcpus = vm->maxcpus;
|
|
}
|
|
|
|
int
|
|
vm_set_topology(struct vm *vm, uint16_t sockets, uint16_t cores,
|
|
uint16_t threads, uint16_t maxcpus)
|
|
{
|
|
if (maxcpus != 0)
|
|
return (EINVAL); /* XXX remove when supported */
|
|
if ((sockets * cores * threads) > VM_MAXCPU)
|
|
return (EINVAL);
|
|
/* XXX need to check sockets * cores * threads == vCPU, how? */
|
|
vm->sockets = sockets;
|
|
vm->cores = cores;
|
|
vm->threads = threads;
|
|
vm->maxcpus = maxcpus;
|
|
return(0);
|
|
}
|
|
|
|
static void
|
|
vm_cleanup(struct vm *vm, bool destroy)
|
|
{
|
|
struct mem_map *mm;
|
|
int i;
|
|
|
|
ppt_unassign_all(vm);
|
|
|
|
if (vm->iommu != NULL)
|
|
iommu_destroy_domain(vm->iommu);
|
|
|
|
if (destroy)
|
|
vrtc_cleanup(vm->vrtc);
|
|
else
|
|
vrtc_reset(vm->vrtc);
|
|
vpmtmr_cleanup(vm->vpmtmr);
|
|
vatpit_cleanup(vm->vatpit);
|
|
vhpet_cleanup(vm->vhpet);
|
|
vatpic_cleanup(vm->vatpic);
|
|
vioapic_cleanup(vm->vioapic);
|
|
|
|
for (i = 0; i < VM_MAXCPU; i++)
|
|
vcpu_cleanup(vm, i, destroy);
|
|
|
|
VMCLEANUP(vm->cookie);
|
|
|
|
/*
|
|
* System memory is removed from the guest address space only when
|
|
* the VM is destroyed. This is because the mapping remains the same
|
|
* across VM reset.
|
|
*
|
|
* Device memory can be relocated by the guest (e.g. using PCI BARs)
|
|
* so those mappings are removed on a VM reset.
|
|
*/
|
|
for (i = 0; i < VM_MAX_MEMMAPS; i++) {
|
|
mm = &vm->mem_maps[i];
|
|
if (destroy || !sysmem_mapping(vm, mm))
|
|
vm_free_memmap(vm, i);
|
|
}
|
|
|
|
if (destroy) {
|
|
for (i = 0; i < VM_MAX_MEMSEGS; i++)
|
|
vm_free_memseg(vm, i);
|
|
|
|
VMSPACE_FREE(vm->vmspace);
|
|
vm->vmspace = NULL;
|
|
}
|
|
}
|
|
|
|
void
|
|
vm_destroy(struct vm *vm)
|
|
{
|
|
vm_cleanup(vm, true);
|
|
free(vm, M_VM);
|
|
}
|
|
|
|
int
|
|
vm_reinit(struct vm *vm)
|
|
{
|
|
int error;
|
|
|
|
/*
|
|
* A virtual machine can be reset only if all vcpus are suspended.
|
|
*/
|
|
if (CPU_CMP(&vm->suspended_cpus, &vm->active_cpus) == 0) {
|
|
vm_cleanup(vm, false);
|
|
vm_init(vm, false);
|
|
error = 0;
|
|
} else {
|
|
error = EBUSY;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
const char *
|
|
vm_name(struct vm *vm)
|
|
{
|
|
return (vm->name);
|
|
}
|
|
|
|
int
|
|
vm_map_mmio(struct vm *vm, vm_paddr_t gpa, size_t len, vm_paddr_t hpa)
|
|
{
|
|
vm_object_t obj;
|
|
|
|
if ((obj = vmm_mmio_alloc(vm->vmspace, gpa, len, hpa)) == NULL)
|
|
return (ENOMEM);
|
|
else
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vm_unmap_mmio(struct vm *vm, vm_paddr_t gpa, size_t len)
|
|
{
|
|
|
|
vmm_mmio_free(vm->vmspace, gpa, len);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return 'true' if 'gpa' is allocated in the guest address space.
|
|
*
|
|
* This function is called in the context of a running vcpu which acts as
|
|
* an implicit lock on 'vm->mem_maps[]'.
|
|
*/
|
|
bool
|
|
vm_mem_allocated(struct vm *vm, int vcpuid, vm_paddr_t gpa)
|
|
{
|
|
struct mem_map *mm;
|
|
int i;
|
|
|
|
#ifdef INVARIANTS
|
|
int hostcpu, state;
|
|
state = vcpu_get_state(vm, vcpuid, &hostcpu);
|
|
KASSERT(state == VCPU_RUNNING && hostcpu == curcpu,
|
|
("%s: invalid vcpu state %d/%d", __func__, state, hostcpu));
|
|
#endif
|
|
|
|
for (i = 0; i < VM_MAX_MEMMAPS; i++) {
|
|
mm = &vm->mem_maps[i];
|
|
if (mm->len != 0 && gpa >= mm->gpa && gpa < mm->gpa + mm->len)
|
|
return (true); /* 'gpa' is sysmem or devmem */
|
|
}
|
|
|
|
if (ppt_is_mmio(vm, gpa))
|
|
return (true); /* 'gpa' is pci passthru mmio */
|
|
|
|
return (false);
|
|
}
|
|
|
|
int
|
|
vm_alloc_memseg(struct vm *vm, int ident, size_t len, bool sysmem)
|
|
{
|
|
struct mem_seg *seg;
|
|
vm_object_t obj;
|
|
|
|
if (ident < 0 || ident >= VM_MAX_MEMSEGS)
|
|
return (EINVAL);
|
|
|
|
if (len == 0 || (len & PAGE_MASK))
|
|
return (EINVAL);
|
|
|
|
seg = &vm->mem_segs[ident];
|
|
if (seg->object != NULL) {
|
|
if (seg->len == len && seg->sysmem == sysmem)
|
|
return (EEXIST);
|
|
else
|
|
return (EINVAL);
|
|
}
|
|
|
|
obj = vm_object_allocate(OBJT_DEFAULT, len >> PAGE_SHIFT);
|
|
if (obj == NULL)
|
|
return (ENOMEM);
|
|
|
|
seg->len = len;
|
|
seg->object = obj;
|
|
seg->sysmem = sysmem;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vm_get_memseg(struct vm *vm, int ident, size_t *len, bool *sysmem,
|
|
vm_object_t *objptr)
|
|
{
|
|
struct mem_seg *seg;
|
|
|
|
if (ident < 0 || ident >= VM_MAX_MEMSEGS)
|
|
return (EINVAL);
|
|
|
|
seg = &vm->mem_segs[ident];
|
|
if (len)
|
|
*len = seg->len;
|
|
if (sysmem)
|
|
*sysmem = seg->sysmem;
|
|
if (objptr)
|
|
*objptr = seg->object;
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
vm_free_memseg(struct vm *vm, int ident)
|
|
{
|
|
struct mem_seg *seg;
|
|
|
|
KASSERT(ident >= 0 && ident < VM_MAX_MEMSEGS,
|
|
("%s: invalid memseg ident %d", __func__, ident));
|
|
|
|
seg = &vm->mem_segs[ident];
|
|
if (seg->object != NULL) {
|
|
vm_object_deallocate(seg->object);
|
|
bzero(seg, sizeof(struct mem_seg));
|
|
}
|
|
}
|
|
|
|
int
|
|
vm_mmap_memseg(struct vm *vm, vm_paddr_t gpa, int segid, vm_ooffset_t first,
|
|
size_t len, int prot, int flags)
|
|
{
|
|
struct mem_seg *seg;
|
|
struct mem_map *m, *map;
|
|
vm_ooffset_t last;
|
|
int i, error;
|
|
|
|
if (prot == 0 || (prot & ~(VM_PROT_ALL)) != 0)
|
|
return (EINVAL);
|
|
|
|
if (flags & ~VM_MEMMAP_F_WIRED)
|
|
return (EINVAL);
|
|
|
|
if (segid < 0 || segid >= VM_MAX_MEMSEGS)
|
|
return (EINVAL);
|
|
|
|
seg = &vm->mem_segs[segid];
|
|
if (seg->object == NULL)
|
|
return (EINVAL);
|
|
|
|
last = first + len;
|
|
if (first < 0 || first >= last || last > seg->len)
|
|
return (EINVAL);
|
|
|
|
if ((gpa | first | last) & PAGE_MASK)
|
|
return (EINVAL);
|
|
|
|
map = NULL;
|
|
for (i = 0; i < VM_MAX_MEMMAPS; i++) {
|
|
m = &vm->mem_maps[i];
|
|
if (m->len == 0) {
|
|
map = m;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (map == NULL)
|
|
return (ENOSPC);
|
|
|
|
error = vm_map_find(&vm->vmspace->vm_map, seg->object, first, &gpa,
|
|
len, 0, VMFS_NO_SPACE, prot, prot, 0);
|
|
if (error != KERN_SUCCESS)
|
|
return (EFAULT);
|
|
|
|
vm_object_reference(seg->object);
|
|
|
|
if (flags & VM_MEMMAP_F_WIRED) {
|
|
error = vm_map_wire(&vm->vmspace->vm_map, gpa, gpa + len,
|
|
VM_MAP_WIRE_USER | VM_MAP_WIRE_NOHOLES);
|
|
if (error != KERN_SUCCESS) {
|
|
vm_map_remove(&vm->vmspace->vm_map, gpa, gpa + len);
|
|
return (EFAULT);
|
|
}
|
|
}
|
|
|
|
map->gpa = gpa;
|
|
map->len = len;
|
|
map->segoff = first;
|
|
map->segid = segid;
|
|
map->prot = prot;
|
|
map->flags = flags;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vm_mmap_getnext(struct vm *vm, vm_paddr_t *gpa, int *segid,
|
|
vm_ooffset_t *segoff, size_t *len, int *prot, int *flags)
|
|
{
|
|
struct mem_map *mm, *mmnext;
|
|
int i;
|
|
|
|
mmnext = NULL;
|
|
for (i = 0; i < VM_MAX_MEMMAPS; i++) {
|
|
mm = &vm->mem_maps[i];
|
|
if (mm->len == 0 || mm->gpa < *gpa)
|
|
continue;
|
|
if (mmnext == NULL || mm->gpa < mmnext->gpa)
|
|
mmnext = mm;
|
|
}
|
|
|
|
if (mmnext != NULL) {
|
|
*gpa = mmnext->gpa;
|
|
if (segid)
|
|
*segid = mmnext->segid;
|
|
if (segoff)
|
|
*segoff = mmnext->segoff;
|
|
if (len)
|
|
*len = mmnext->len;
|
|
if (prot)
|
|
*prot = mmnext->prot;
|
|
if (flags)
|
|
*flags = mmnext->flags;
|
|
return (0);
|
|
} else {
|
|
return (ENOENT);
|
|
}
|
|
}
|
|
|
|
static void
|
|
vm_free_memmap(struct vm *vm, int ident)
|
|
{
|
|
struct mem_map *mm;
|
|
int error;
|
|
|
|
mm = &vm->mem_maps[ident];
|
|
if (mm->len) {
|
|
error = vm_map_remove(&vm->vmspace->vm_map, mm->gpa,
|
|
mm->gpa + mm->len);
|
|
KASSERT(error == KERN_SUCCESS, ("%s: vm_map_remove error %d",
|
|
__func__, error));
|
|
bzero(mm, sizeof(struct mem_map));
|
|
}
|
|
}
|
|
|
|
static __inline bool
|
|
sysmem_mapping(struct vm *vm, struct mem_map *mm)
|
|
{
|
|
|
|
if (mm->len != 0 && vm->mem_segs[mm->segid].sysmem)
|
|
return (true);
|
|
else
|
|
return (false);
|
|
}
|
|
|
|
vm_paddr_t
|
|
vmm_sysmem_maxaddr(struct vm *vm)
|
|
{
|
|
struct mem_map *mm;
|
|
vm_paddr_t maxaddr;
|
|
int i;
|
|
|
|
maxaddr = 0;
|
|
for (i = 0; i < VM_MAX_MEMMAPS; i++) {
|
|
mm = &vm->mem_maps[i];
|
|
if (sysmem_mapping(vm, mm)) {
|
|
if (maxaddr < mm->gpa + mm->len)
|
|
maxaddr = mm->gpa + mm->len;
|
|
}
|
|
}
|
|
return (maxaddr);
|
|
}
|
|
|
|
static void
|
|
vm_iommu_modify(struct vm *vm, boolean_t map)
|
|
{
|
|
int i, sz;
|
|
vm_paddr_t gpa, hpa;
|
|
struct mem_map *mm;
|
|
void *vp, *cookie, *host_domain;
|
|
|
|
sz = PAGE_SIZE;
|
|
host_domain = iommu_host_domain();
|
|
|
|
for (i = 0; i < VM_MAX_MEMMAPS; i++) {
|
|
mm = &vm->mem_maps[i];
|
|
if (!sysmem_mapping(vm, mm))
|
|
continue;
|
|
|
|
if (map) {
|
|
KASSERT((mm->flags & VM_MEMMAP_F_IOMMU) == 0,
|
|
("iommu map found invalid memmap %#lx/%#lx/%#x",
|
|
mm->gpa, mm->len, mm->flags));
|
|
if ((mm->flags & VM_MEMMAP_F_WIRED) == 0)
|
|
continue;
|
|
mm->flags |= VM_MEMMAP_F_IOMMU;
|
|
} else {
|
|
if ((mm->flags & VM_MEMMAP_F_IOMMU) == 0)
|
|
continue;
|
|
mm->flags &= ~VM_MEMMAP_F_IOMMU;
|
|
KASSERT((mm->flags & VM_MEMMAP_F_WIRED) != 0,
|
|
("iommu unmap found invalid memmap %#lx/%#lx/%#x",
|
|
mm->gpa, mm->len, mm->flags));
|
|
}
|
|
|
|
gpa = mm->gpa;
|
|
while (gpa < mm->gpa + mm->len) {
|
|
vp = vm_gpa_hold(vm, -1, gpa, PAGE_SIZE, VM_PROT_WRITE,
|
|
&cookie);
|
|
KASSERT(vp != NULL, ("vm(%s) could not map gpa %#lx",
|
|
vm_name(vm), gpa));
|
|
|
|
vm_gpa_release(cookie);
|
|
|
|
hpa = DMAP_TO_PHYS((uintptr_t)vp);
|
|
if (map) {
|
|
iommu_create_mapping(vm->iommu, gpa, hpa, sz);
|
|
iommu_remove_mapping(host_domain, hpa, sz);
|
|
} else {
|
|
iommu_remove_mapping(vm->iommu, gpa, sz);
|
|
iommu_create_mapping(host_domain, hpa, hpa, sz);
|
|
}
|
|
|
|
gpa += PAGE_SIZE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Invalidate the cached translations associated with the domain
|
|
* from which pages were removed.
|
|
*/
|
|
if (map)
|
|
iommu_invalidate_tlb(host_domain);
|
|
else
|
|
iommu_invalidate_tlb(vm->iommu);
|
|
}
|
|
|
|
#define vm_iommu_unmap(vm) vm_iommu_modify((vm), FALSE)
|
|
#define vm_iommu_map(vm) vm_iommu_modify((vm), TRUE)
|
|
|
|
int
|
|
vm_unassign_pptdev(struct vm *vm, int bus, int slot, int func)
|
|
{
|
|
int error;
|
|
|
|
error = ppt_unassign_device(vm, bus, slot, func);
|
|
if (error)
|
|
return (error);
|
|
|
|
if (ppt_assigned_devices(vm) == 0)
|
|
vm_iommu_unmap(vm);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vm_assign_pptdev(struct vm *vm, int bus, int slot, int func)
|
|
{
|
|
int error;
|
|
vm_paddr_t maxaddr;
|
|
|
|
/* Set up the IOMMU to do the 'gpa' to 'hpa' translation */
|
|
if (ppt_assigned_devices(vm) == 0) {
|
|
KASSERT(vm->iommu == NULL,
|
|
("vm_assign_pptdev: iommu must be NULL"));
|
|
maxaddr = vmm_sysmem_maxaddr(vm);
|
|
vm->iommu = iommu_create_domain(maxaddr);
|
|
if (vm->iommu == NULL)
|
|
return (ENXIO);
|
|
vm_iommu_map(vm);
|
|
}
|
|
|
|
error = ppt_assign_device(vm, bus, slot, func);
|
|
return (error);
|
|
}
|
|
|
|
void *
|
|
vm_gpa_hold(struct vm *vm, int vcpuid, vm_paddr_t gpa, size_t len, int reqprot,
|
|
void **cookie)
|
|
{
|
|
int i, count, pageoff;
|
|
struct mem_map *mm;
|
|
vm_page_t m;
|
|
#ifdef INVARIANTS
|
|
/*
|
|
* All vcpus are frozen by ioctls that modify the memory map
|
|
* (e.g. VM_MMAP_MEMSEG). Therefore 'vm->memmap[]' stability is
|
|
* guaranteed if at least one vcpu is in the VCPU_FROZEN state.
|
|
*/
|
|
int state;
|
|
KASSERT(vcpuid >= -1 && vcpuid < VM_MAXCPU, ("%s: invalid vcpuid %d",
|
|
__func__, vcpuid));
|
|
for (i = 0; i < VM_MAXCPU; i++) {
|
|
if (vcpuid != -1 && vcpuid != i)
|
|
continue;
|
|
state = vcpu_get_state(vm, i, NULL);
|
|
KASSERT(state == VCPU_FROZEN, ("%s: invalid vcpu state %d",
|
|
__func__, state));
|
|
}
|
|
#endif
|
|
pageoff = gpa & PAGE_MASK;
|
|
if (len > PAGE_SIZE - pageoff)
|
|
panic("vm_gpa_hold: invalid gpa/len: 0x%016lx/%lu", gpa, len);
|
|
|
|
count = 0;
|
|
for (i = 0; i < VM_MAX_MEMMAPS; i++) {
|
|
mm = &vm->mem_maps[i];
|
|
if (sysmem_mapping(vm, mm) && gpa >= mm->gpa &&
|
|
gpa < mm->gpa + mm->len) {
|
|
count = vm_fault_quick_hold_pages(&vm->vmspace->vm_map,
|
|
trunc_page(gpa), PAGE_SIZE, reqprot, &m, 1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (count == 1) {
|
|
*cookie = m;
|
|
return ((void *)(PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m)) + pageoff));
|
|
} else {
|
|
*cookie = NULL;
|
|
return (NULL);
|
|
}
|
|
}
|
|
|
|
void
|
|
vm_gpa_release(void *cookie)
|
|
{
|
|
vm_page_t m = cookie;
|
|
|
|
vm_page_lock(m);
|
|
vm_page_unhold(m);
|
|
vm_page_unlock(m);
|
|
}
|
|
|
|
int
|
|
vm_get_register(struct vm *vm, int vcpu, int reg, uint64_t *retval)
|
|
{
|
|
|
|
if (vcpu < 0 || vcpu >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
if (reg >= VM_REG_LAST)
|
|
return (EINVAL);
|
|
|
|
return (VMGETREG(vm->cookie, vcpu, reg, retval));
|
|
}
|
|
|
|
int
|
|
vm_set_register(struct vm *vm, int vcpuid, int reg, uint64_t val)
|
|
{
|
|
struct vcpu *vcpu;
|
|
int error;
|
|
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
if (reg >= VM_REG_LAST)
|
|
return (EINVAL);
|
|
|
|
error = VMSETREG(vm->cookie, vcpuid, reg, val);
|
|
if (error || reg != VM_REG_GUEST_RIP)
|
|
return (error);
|
|
|
|
/* Set 'nextrip' to match the value of %rip */
|
|
VCPU_CTR1(vm, vcpuid, "Setting nextrip to %#lx", val);
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
vcpu->nextrip = val;
|
|
return (0);
|
|
}
|
|
|
|
static boolean_t
|
|
is_descriptor_table(int reg)
|
|
{
|
|
|
|
switch (reg) {
|
|
case VM_REG_GUEST_IDTR:
|
|
case VM_REG_GUEST_GDTR:
|
|
return (TRUE);
|
|
default:
|
|
return (FALSE);
|
|
}
|
|
}
|
|
|
|
static boolean_t
|
|
is_segment_register(int reg)
|
|
{
|
|
|
|
switch (reg) {
|
|
case VM_REG_GUEST_ES:
|
|
case VM_REG_GUEST_CS:
|
|
case VM_REG_GUEST_SS:
|
|
case VM_REG_GUEST_DS:
|
|
case VM_REG_GUEST_FS:
|
|
case VM_REG_GUEST_GS:
|
|
case VM_REG_GUEST_TR:
|
|
case VM_REG_GUEST_LDTR:
|
|
return (TRUE);
|
|
default:
|
|
return (FALSE);
|
|
}
|
|
}
|
|
|
|
int
|
|
vm_get_seg_desc(struct vm *vm, int vcpu, int reg,
|
|
struct seg_desc *desc)
|
|
{
|
|
|
|
if (vcpu < 0 || vcpu >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
if (!is_segment_register(reg) && !is_descriptor_table(reg))
|
|
return (EINVAL);
|
|
|
|
return (VMGETDESC(vm->cookie, vcpu, reg, desc));
|
|
}
|
|
|
|
int
|
|
vm_set_seg_desc(struct vm *vm, int vcpu, int reg,
|
|
struct seg_desc *desc)
|
|
{
|
|
if (vcpu < 0 || vcpu >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
if (!is_segment_register(reg) && !is_descriptor_table(reg))
|
|
return (EINVAL);
|
|
|
|
return (VMSETDESC(vm->cookie, vcpu, reg, desc));
|
|
}
|
|
|
|
static void
|
|
restore_guest_fpustate(struct vcpu *vcpu)
|
|
{
|
|
|
|
/* flush host state to the pcb */
|
|
fpuexit(curthread);
|
|
|
|
/* restore guest FPU state */
|
|
fpu_stop_emulating();
|
|
fpurestore(vcpu->guestfpu);
|
|
|
|
/* restore guest XCR0 if XSAVE is enabled in the host */
|
|
if (rcr4() & CR4_XSAVE)
|
|
load_xcr(0, vcpu->guest_xcr0);
|
|
|
|
/*
|
|
* The FPU is now "dirty" with the guest's state so turn on emulation
|
|
* to trap any access to the FPU by the host.
|
|
*/
|
|
fpu_start_emulating();
|
|
}
|
|
|
|
static void
|
|
save_guest_fpustate(struct vcpu *vcpu)
|
|
{
|
|
|
|
if ((rcr0() & CR0_TS) == 0)
|
|
panic("fpu emulation not enabled in host!");
|
|
|
|
/* save guest XCR0 and restore host XCR0 */
|
|
if (rcr4() & CR4_XSAVE) {
|
|
vcpu->guest_xcr0 = rxcr(0);
|
|
load_xcr(0, vmm_get_host_xcr0());
|
|
}
|
|
|
|
/* save guest FPU state */
|
|
fpu_stop_emulating();
|
|
fpusave(vcpu->guestfpu);
|
|
fpu_start_emulating();
|
|
}
|
|
|
|
static VMM_STAT(VCPU_IDLE_TICKS, "number of ticks vcpu was idle");
|
|
|
|
static int
|
|
vcpu_set_state_locked(struct vm *vm, int vcpuid, enum vcpu_state newstate,
|
|
bool from_idle)
|
|
{
|
|
struct vcpu *vcpu;
|
|
int error;
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
vcpu_assert_locked(vcpu);
|
|
|
|
/*
|
|
* State transitions from the vmmdev_ioctl() must always begin from
|
|
* the VCPU_IDLE state. This guarantees that there is only a single
|
|
* ioctl() operating on a vcpu at any point.
|
|
*/
|
|
if (from_idle) {
|
|
while (vcpu->state != VCPU_IDLE) {
|
|
vcpu->reqidle = 1;
|
|
vcpu_notify_event_locked(vcpu, false);
|
|
VCPU_CTR1(vm, vcpuid, "vcpu state change from %s to "
|
|
"idle requested", vcpu_state2str(vcpu->state));
|
|
msleep_spin(&vcpu->state, &vcpu->mtx, "vmstat", hz);
|
|
}
|
|
} else {
|
|
KASSERT(vcpu->state != VCPU_IDLE, ("invalid transition from "
|
|
"vcpu idle state"));
|
|
}
|
|
|
|
if (vcpu->state == VCPU_RUNNING) {
|
|
KASSERT(vcpu->hostcpu == curcpu, ("curcpu %d and hostcpu %d "
|
|
"mismatch for running vcpu", curcpu, vcpu->hostcpu));
|
|
} else {
|
|
KASSERT(vcpu->hostcpu == NOCPU, ("Invalid hostcpu %d for a "
|
|
"vcpu that is not running", vcpu->hostcpu));
|
|
}
|
|
|
|
/*
|
|
* The following state transitions are allowed:
|
|
* IDLE -> FROZEN -> IDLE
|
|
* FROZEN -> RUNNING -> FROZEN
|
|
* FROZEN -> SLEEPING -> FROZEN
|
|
*/
|
|
switch (vcpu->state) {
|
|
case VCPU_IDLE:
|
|
case VCPU_RUNNING:
|
|
case VCPU_SLEEPING:
|
|
error = (newstate != VCPU_FROZEN);
|
|
break;
|
|
case VCPU_FROZEN:
|
|
error = (newstate == VCPU_FROZEN);
|
|
break;
|
|
default:
|
|
error = 1;
|
|
break;
|
|
}
|
|
|
|
if (error)
|
|
return (EBUSY);
|
|
|
|
VCPU_CTR2(vm, vcpuid, "vcpu state changed from %s to %s",
|
|
vcpu_state2str(vcpu->state), vcpu_state2str(newstate));
|
|
|
|
vcpu->state = newstate;
|
|
if (newstate == VCPU_RUNNING)
|
|
vcpu->hostcpu = curcpu;
|
|
else
|
|
vcpu->hostcpu = NOCPU;
|
|
|
|
if (newstate == VCPU_IDLE)
|
|
wakeup(&vcpu->state);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
vcpu_require_state(struct vm *vm, int vcpuid, enum vcpu_state newstate)
|
|
{
|
|
int error;
|
|
|
|
if ((error = vcpu_set_state(vm, vcpuid, newstate, false)) != 0)
|
|
panic("Error %d setting state to %d\n", error, newstate);
|
|
}
|
|
|
|
static void
|
|
vcpu_require_state_locked(struct vm *vm, int vcpuid, enum vcpu_state newstate)
|
|
{
|
|
int error;
|
|
|
|
if ((error = vcpu_set_state_locked(vm, vcpuid, newstate, false)) != 0)
|
|
panic("Error %d setting state to %d", error, newstate);
|
|
}
|
|
|
|
static void
|
|
vm_set_rendezvous_func(struct vm *vm, vm_rendezvous_func_t func)
|
|
{
|
|
|
|
KASSERT(mtx_owned(&vm->rendezvous_mtx), ("rendezvous_mtx not locked"));
|
|
|
|
/*
|
|
* Update 'rendezvous_func' and execute a write memory barrier to
|
|
* ensure that it is visible across all host cpus. This is not needed
|
|
* for correctness but it does ensure that all the vcpus will notice
|
|
* that the rendezvous is requested immediately.
|
|
*/
|
|
vm->rendezvous_func = func;
|
|
wmb();
|
|
}
|
|
|
|
#define RENDEZVOUS_CTR0(vm, vcpuid, fmt) \
|
|
do { \
|
|
if (vcpuid >= 0) \
|
|
VCPU_CTR0(vm, vcpuid, fmt); \
|
|
else \
|
|
VM_CTR0(vm, fmt); \
|
|
} while (0)
|
|
|
|
static void
|
|
vm_handle_rendezvous(struct vm *vm, int vcpuid)
|
|
{
|
|
|
|
KASSERT(vcpuid == -1 || (vcpuid >= 0 && vcpuid < VM_MAXCPU),
|
|
("vm_handle_rendezvous: invalid vcpuid %d", vcpuid));
|
|
|
|
mtx_lock(&vm->rendezvous_mtx);
|
|
while (vm->rendezvous_func != NULL) {
|
|
/* 'rendezvous_req_cpus' must be a subset of 'active_cpus' */
|
|
CPU_AND(&vm->rendezvous_req_cpus, &vm->active_cpus);
|
|
|
|
if (vcpuid != -1 &&
|
|
CPU_ISSET(vcpuid, &vm->rendezvous_req_cpus) &&
|
|
!CPU_ISSET(vcpuid, &vm->rendezvous_done_cpus)) {
|
|
VCPU_CTR0(vm, vcpuid, "Calling rendezvous func");
|
|
(*vm->rendezvous_func)(vm, vcpuid, vm->rendezvous_arg);
|
|
CPU_SET(vcpuid, &vm->rendezvous_done_cpus);
|
|
}
|
|
if (CPU_CMP(&vm->rendezvous_req_cpus,
|
|
&vm->rendezvous_done_cpus) == 0) {
|
|
VCPU_CTR0(vm, vcpuid, "Rendezvous completed");
|
|
vm_set_rendezvous_func(vm, NULL);
|
|
wakeup(&vm->rendezvous_func);
|
|
break;
|
|
}
|
|
RENDEZVOUS_CTR0(vm, vcpuid, "Wait for rendezvous completion");
|
|
mtx_sleep(&vm->rendezvous_func, &vm->rendezvous_mtx, 0,
|
|
"vmrndv", 0);
|
|
}
|
|
mtx_unlock(&vm->rendezvous_mtx);
|
|
}
|
|
|
|
/*
|
|
* Emulate a guest 'hlt' by sleeping until the vcpu is ready to run.
|
|
*/
|
|
static int
|
|
vm_handle_hlt(struct vm *vm, int vcpuid, bool intr_disabled, bool *retu)
|
|
{
|
|
struct vcpu *vcpu;
|
|
const char *wmesg;
|
|
int t, vcpu_halted, vm_halted;
|
|
|
|
KASSERT(!CPU_ISSET(vcpuid, &vm->halted_cpus), ("vcpu already halted"));
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
vcpu_halted = 0;
|
|
vm_halted = 0;
|
|
|
|
vcpu_lock(vcpu);
|
|
while (1) {
|
|
/*
|
|
* Do a final check for pending NMI or interrupts before
|
|
* really putting this thread to sleep. Also check for
|
|
* software events that would cause this vcpu to wakeup.
|
|
*
|
|
* These interrupts/events could have happened after the
|
|
* vcpu returned from VMRUN() and before it acquired the
|
|
* vcpu lock above.
|
|
*/
|
|
if (vm->rendezvous_func != NULL || vm->suspend || vcpu->reqidle)
|
|
break;
|
|
if (vm_nmi_pending(vm, vcpuid))
|
|
break;
|
|
if (!intr_disabled) {
|
|
if (vm_extint_pending(vm, vcpuid) ||
|
|
vlapic_pending_intr(vcpu->vlapic, NULL)) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Don't go to sleep if the vcpu thread needs to yield */
|
|
if (vcpu_should_yield(vm, vcpuid))
|
|
break;
|
|
|
|
if (vcpu_debugged(vm, vcpuid))
|
|
break;
|
|
|
|
/*
|
|
* Some Linux guests implement "halt" by having all vcpus
|
|
* execute HLT with interrupts disabled. 'halted_cpus' keeps
|
|
* track of the vcpus that have entered this state. When all
|
|
* vcpus enter the halted state the virtual machine is halted.
|
|
*/
|
|
if (intr_disabled) {
|
|
wmesg = "vmhalt";
|
|
VCPU_CTR0(vm, vcpuid, "Halted");
|
|
if (!vcpu_halted && halt_detection_enabled) {
|
|
vcpu_halted = 1;
|
|
CPU_SET_ATOMIC(vcpuid, &vm->halted_cpus);
|
|
}
|
|
if (CPU_CMP(&vm->halted_cpus, &vm->active_cpus) == 0) {
|
|
vm_halted = 1;
|
|
break;
|
|
}
|
|
} else {
|
|
wmesg = "vmidle";
|
|
}
|
|
|
|
t = ticks;
|
|
vcpu_require_state_locked(vm, vcpuid, VCPU_SLEEPING);
|
|
/*
|
|
* XXX msleep_spin() cannot be interrupted by signals so
|
|
* wake up periodically to check pending signals.
|
|
*/
|
|
msleep_spin(vcpu, &vcpu->mtx, wmesg, hz);
|
|
vcpu_require_state_locked(vm, vcpuid, VCPU_FROZEN);
|
|
vmm_stat_incr(vm, vcpuid, VCPU_IDLE_TICKS, ticks - t);
|
|
}
|
|
|
|
if (vcpu_halted)
|
|
CPU_CLR_ATOMIC(vcpuid, &vm->halted_cpus);
|
|
|
|
vcpu_unlock(vcpu);
|
|
|
|
if (vm_halted)
|
|
vm_suspend(vm, VM_SUSPEND_HALT);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vm_handle_paging(struct vm *vm, int vcpuid, bool *retu)
|
|
{
|
|
int rv, ftype;
|
|
struct vm_map *map;
|
|
struct vcpu *vcpu;
|
|
struct vm_exit *vme;
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
vme = &vcpu->exitinfo;
|
|
|
|
KASSERT(vme->inst_length == 0, ("%s: invalid inst_length %d",
|
|
__func__, vme->inst_length));
|
|
|
|
ftype = vme->u.paging.fault_type;
|
|
KASSERT(ftype == VM_PROT_READ ||
|
|
ftype == VM_PROT_WRITE || ftype == VM_PROT_EXECUTE,
|
|
("vm_handle_paging: invalid fault_type %d", ftype));
|
|
|
|
if (ftype == VM_PROT_READ || ftype == VM_PROT_WRITE) {
|
|
rv = pmap_emulate_accessed_dirty(vmspace_pmap(vm->vmspace),
|
|
vme->u.paging.gpa, ftype);
|
|
if (rv == 0) {
|
|
VCPU_CTR2(vm, vcpuid, "%s bit emulation for gpa %#lx",
|
|
ftype == VM_PROT_READ ? "accessed" : "dirty",
|
|
vme->u.paging.gpa);
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
map = &vm->vmspace->vm_map;
|
|
rv = vm_fault(map, vme->u.paging.gpa, ftype, VM_FAULT_NORMAL);
|
|
|
|
VCPU_CTR3(vm, vcpuid, "vm_handle_paging rv = %d, gpa = %#lx, "
|
|
"ftype = %d", rv, vme->u.paging.gpa, ftype);
|
|
|
|
if (rv != KERN_SUCCESS)
|
|
return (EFAULT);
|
|
done:
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vm_handle_inst_emul(struct vm *vm, int vcpuid, bool *retu)
|
|
{
|
|
struct vie *vie;
|
|
struct vcpu *vcpu;
|
|
struct vm_exit *vme;
|
|
uint64_t gla, gpa, cs_base;
|
|
struct vm_guest_paging *paging;
|
|
mem_region_read_t mread;
|
|
mem_region_write_t mwrite;
|
|
enum vm_cpu_mode cpu_mode;
|
|
int cs_d, error, fault;
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
vme = &vcpu->exitinfo;
|
|
|
|
KASSERT(vme->inst_length == 0, ("%s: invalid inst_length %d",
|
|
__func__, vme->inst_length));
|
|
|
|
gla = vme->u.inst_emul.gla;
|
|
gpa = vme->u.inst_emul.gpa;
|
|
cs_base = vme->u.inst_emul.cs_base;
|
|
cs_d = vme->u.inst_emul.cs_d;
|
|
vie = &vme->u.inst_emul.vie;
|
|
paging = &vme->u.inst_emul.paging;
|
|
cpu_mode = paging->cpu_mode;
|
|
|
|
VCPU_CTR1(vm, vcpuid, "inst_emul fault accessing gpa %#lx", gpa);
|
|
|
|
/* Fetch, decode and emulate the faulting instruction */
|
|
if (vie->num_valid == 0) {
|
|
error = vmm_fetch_instruction(vm, vcpuid, paging, vme->rip +
|
|
cs_base, VIE_INST_SIZE, vie, &fault);
|
|
} else {
|
|
/*
|
|
* The instruction bytes have already been copied into 'vie'
|
|
*/
|
|
error = fault = 0;
|
|
}
|
|
if (error || fault)
|
|
return (error);
|
|
|
|
if (vmm_decode_instruction(vm, vcpuid, gla, cpu_mode, cs_d, vie) != 0) {
|
|
VCPU_CTR1(vm, vcpuid, "Error decoding instruction at %#lx",
|
|
vme->rip + cs_base);
|
|
*retu = true; /* dump instruction bytes in userspace */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Update 'nextrip' based on the length of the emulated instruction.
|
|
*/
|
|
vme->inst_length = vie->num_processed;
|
|
vcpu->nextrip += vie->num_processed;
|
|
VCPU_CTR1(vm, vcpuid, "nextrip updated to %#lx after instruction "
|
|
"decoding", vcpu->nextrip);
|
|
|
|
/* return to userland unless this is an in-kernel emulated device */
|
|
if (gpa >= DEFAULT_APIC_BASE && gpa < DEFAULT_APIC_BASE + PAGE_SIZE) {
|
|
mread = lapic_mmio_read;
|
|
mwrite = lapic_mmio_write;
|
|
} else if (gpa >= VIOAPIC_BASE && gpa < VIOAPIC_BASE + VIOAPIC_SIZE) {
|
|
mread = vioapic_mmio_read;
|
|
mwrite = vioapic_mmio_write;
|
|
} else if (gpa >= VHPET_BASE && gpa < VHPET_BASE + VHPET_SIZE) {
|
|
mread = vhpet_mmio_read;
|
|
mwrite = vhpet_mmio_write;
|
|
} else {
|
|
*retu = true;
|
|
return (0);
|
|
}
|
|
|
|
error = vmm_emulate_instruction(vm, vcpuid, gpa, vie, paging,
|
|
mread, mwrite, retu);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
vm_handle_suspend(struct vm *vm, int vcpuid, bool *retu)
|
|
{
|
|
int i, done;
|
|
struct vcpu *vcpu;
|
|
|
|
done = 0;
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
|
|
CPU_SET_ATOMIC(vcpuid, &vm->suspended_cpus);
|
|
|
|
/*
|
|
* Wait until all 'active_cpus' have suspended themselves.
|
|
*
|
|
* Since a VM may be suspended at any time including when one or
|
|
* more vcpus are doing a rendezvous we need to call the rendezvous
|
|
* handler while we are waiting to prevent a deadlock.
|
|
*/
|
|
vcpu_lock(vcpu);
|
|
while (1) {
|
|
if (CPU_CMP(&vm->suspended_cpus, &vm->active_cpus) == 0) {
|
|
VCPU_CTR0(vm, vcpuid, "All vcpus suspended");
|
|
break;
|
|
}
|
|
|
|
if (vm->rendezvous_func == NULL) {
|
|
VCPU_CTR0(vm, vcpuid, "Sleeping during suspend");
|
|
vcpu_require_state_locked(vm, vcpuid, VCPU_SLEEPING);
|
|
msleep_spin(vcpu, &vcpu->mtx, "vmsusp", hz);
|
|
vcpu_require_state_locked(vm, vcpuid, VCPU_FROZEN);
|
|
} else {
|
|
VCPU_CTR0(vm, vcpuid, "Rendezvous during suspend");
|
|
vcpu_unlock(vcpu);
|
|
vm_handle_rendezvous(vm, vcpuid);
|
|
vcpu_lock(vcpu);
|
|
}
|
|
}
|
|
vcpu_unlock(vcpu);
|
|
|
|
/*
|
|
* Wakeup the other sleeping vcpus and return to userspace.
|
|
*/
|
|
for (i = 0; i < VM_MAXCPU; i++) {
|
|
if (CPU_ISSET(i, &vm->suspended_cpus)) {
|
|
vcpu_notify_event(vm, i, false);
|
|
}
|
|
}
|
|
|
|
*retu = true;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vm_handle_reqidle(struct vm *vm, int vcpuid, bool *retu)
|
|
{
|
|
struct vcpu *vcpu = &vm->vcpu[vcpuid];
|
|
|
|
vcpu_lock(vcpu);
|
|
KASSERT(vcpu->reqidle, ("invalid vcpu reqidle %d", vcpu->reqidle));
|
|
vcpu->reqidle = 0;
|
|
vcpu_unlock(vcpu);
|
|
*retu = true;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vm_suspend(struct vm *vm, enum vm_suspend_how how)
|
|
{
|
|
int i;
|
|
|
|
if (how <= VM_SUSPEND_NONE || how >= VM_SUSPEND_LAST)
|
|
return (EINVAL);
|
|
|
|
if (atomic_cmpset_int(&vm->suspend, 0, how) == 0) {
|
|
VM_CTR2(vm, "virtual machine already suspended %d/%d",
|
|
vm->suspend, how);
|
|
return (EALREADY);
|
|
}
|
|
|
|
VM_CTR1(vm, "virtual machine successfully suspended %d", how);
|
|
|
|
/*
|
|
* Notify all active vcpus that they are now suspended.
|
|
*/
|
|
for (i = 0; i < VM_MAXCPU; i++) {
|
|
if (CPU_ISSET(i, &vm->active_cpus))
|
|
vcpu_notify_event(vm, i, false);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
vm_exit_suspended(struct vm *vm, int vcpuid, uint64_t rip)
|
|
{
|
|
struct vm_exit *vmexit;
|
|
|
|
KASSERT(vm->suspend > VM_SUSPEND_NONE && vm->suspend < VM_SUSPEND_LAST,
|
|
("vm_exit_suspended: invalid suspend type %d", vm->suspend));
|
|
|
|
vmexit = vm_exitinfo(vm, vcpuid);
|
|
vmexit->rip = rip;
|
|
vmexit->inst_length = 0;
|
|
vmexit->exitcode = VM_EXITCODE_SUSPENDED;
|
|
vmexit->u.suspended.how = vm->suspend;
|
|
}
|
|
|
|
void
|
|
vm_exit_debug(struct vm *vm, int vcpuid, uint64_t rip)
|
|
{
|
|
struct vm_exit *vmexit;
|
|
|
|
vmexit = vm_exitinfo(vm, vcpuid);
|
|
vmexit->rip = rip;
|
|
vmexit->inst_length = 0;
|
|
vmexit->exitcode = VM_EXITCODE_DEBUG;
|
|
}
|
|
|
|
void
|
|
vm_exit_rendezvous(struct vm *vm, int vcpuid, uint64_t rip)
|
|
{
|
|
struct vm_exit *vmexit;
|
|
|
|
KASSERT(vm->rendezvous_func != NULL, ("rendezvous not in progress"));
|
|
|
|
vmexit = vm_exitinfo(vm, vcpuid);
|
|
vmexit->rip = rip;
|
|
vmexit->inst_length = 0;
|
|
vmexit->exitcode = VM_EXITCODE_RENDEZVOUS;
|
|
vmm_stat_incr(vm, vcpuid, VMEXIT_RENDEZVOUS, 1);
|
|
}
|
|
|
|
void
|
|
vm_exit_reqidle(struct vm *vm, int vcpuid, uint64_t rip)
|
|
{
|
|
struct vm_exit *vmexit;
|
|
|
|
vmexit = vm_exitinfo(vm, vcpuid);
|
|
vmexit->rip = rip;
|
|
vmexit->inst_length = 0;
|
|
vmexit->exitcode = VM_EXITCODE_REQIDLE;
|
|
vmm_stat_incr(vm, vcpuid, VMEXIT_REQIDLE, 1);
|
|
}
|
|
|
|
void
|
|
vm_exit_astpending(struct vm *vm, int vcpuid, uint64_t rip)
|
|
{
|
|
struct vm_exit *vmexit;
|
|
|
|
vmexit = vm_exitinfo(vm, vcpuid);
|
|
vmexit->rip = rip;
|
|
vmexit->inst_length = 0;
|
|
vmexit->exitcode = VM_EXITCODE_BOGUS;
|
|
vmm_stat_incr(vm, vcpuid, VMEXIT_ASTPENDING, 1);
|
|
}
|
|
|
|
int
|
|
vm_run(struct vm *vm, struct vm_run *vmrun)
|
|
{
|
|
struct vm_eventinfo evinfo;
|
|
int error, vcpuid;
|
|
struct vcpu *vcpu;
|
|
struct pcb *pcb;
|
|
uint64_t tscval;
|
|
struct vm_exit *vme;
|
|
bool retu, intr_disabled;
|
|
pmap_t pmap;
|
|
|
|
vcpuid = vmrun->cpuid;
|
|
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
if (!CPU_ISSET(vcpuid, &vm->active_cpus))
|
|
return (EINVAL);
|
|
|
|
if (CPU_ISSET(vcpuid, &vm->suspended_cpus))
|
|
return (EINVAL);
|
|
|
|
pmap = vmspace_pmap(vm->vmspace);
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
vme = &vcpu->exitinfo;
|
|
evinfo.rptr = &vm->rendezvous_func;
|
|
evinfo.sptr = &vm->suspend;
|
|
evinfo.iptr = &vcpu->reqidle;
|
|
restart:
|
|
critical_enter();
|
|
|
|
KASSERT(!CPU_ISSET(curcpu, &pmap->pm_active),
|
|
("vm_run: absurd pm_active"));
|
|
|
|
tscval = rdtsc();
|
|
|
|
pcb = PCPU_GET(curpcb);
|
|
set_pcb_flags(pcb, PCB_FULL_IRET);
|
|
|
|
restore_guest_fpustate(vcpu);
|
|
|
|
vcpu_require_state(vm, vcpuid, VCPU_RUNNING);
|
|
error = VMRUN(vm->cookie, vcpuid, vcpu->nextrip, pmap, &evinfo);
|
|
vcpu_require_state(vm, vcpuid, VCPU_FROZEN);
|
|
|
|
save_guest_fpustate(vcpu);
|
|
|
|
vmm_stat_incr(vm, vcpuid, VCPU_TOTAL_RUNTIME, rdtsc() - tscval);
|
|
|
|
critical_exit();
|
|
|
|
if (error == 0) {
|
|
retu = false;
|
|
vcpu->nextrip = vme->rip + vme->inst_length;
|
|
switch (vme->exitcode) {
|
|
case VM_EXITCODE_REQIDLE:
|
|
error = vm_handle_reqidle(vm, vcpuid, &retu);
|
|
break;
|
|
case VM_EXITCODE_SUSPENDED:
|
|
error = vm_handle_suspend(vm, vcpuid, &retu);
|
|
break;
|
|
case VM_EXITCODE_IOAPIC_EOI:
|
|
vioapic_process_eoi(vm, vcpuid,
|
|
vme->u.ioapic_eoi.vector);
|
|
break;
|
|
case VM_EXITCODE_RENDEZVOUS:
|
|
vm_handle_rendezvous(vm, vcpuid);
|
|
error = 0;
|
|
break;
|
|
case VM_EXITCODE_HLT:
|
|
intr_disabled = ((vme->u.hlt.rflags & PSL_I) == 0);
|
|
error = vm_handle_hlt(vm, vcpuid, intr_disabled, &retu);
|
|
break;
|
|
case VM_EXITCODE_PAGING:
|
|
error = vm_handle_paging(vm, vcpuid, &retu);
|
|
break;
|
|
case VM_EXITCODE_INST_EMUL:
|
|
error = vm_handle_inst_emul(vm, vcpuid, &retu);
|
|
break;
|
|
case VM_EXITCODE_INOUT:
|
|
case VM_EXITCODE_INOUT_STR:
|
|
error = vm_handle_inout(vm, vcpuid, vme, &retu);
|
|
break;
|
|
case VM_EXITCODE_MONITOR:
|
|
case VM_EXITCODE_MWAIT:
|
|
case VM_EXITCODE_VMINSN:
|
|
vm_inject_ud(vm, vcpuid);
|
|
break;
|
|
default:
|
|
retu = true; /* handled in userland */
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (error == 0 && retu == false)
|
|
goto restart;
|
|
|
|
VCPU_CTR2(vm, vcpuid, "retu %d/%d", error, vme->exitcode);
|
|
|
|
/* copy the exit information */
|
|
bcopy(vme, &vmrun->vm_exit, sizeof(struct vm_exit));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
vm_restart_instruction(void *arg, int vcpuid)
|
|
{
|
|
struct vm *vm;
|
|
struct vcpu *vcpu;
|
|
enum vcpu_state state;
|
|
uint64_t rip;
|
|
int error;
|
|
|
|
vm = arg;
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
state = vcpu_get_state(vm, vcpuid, NULL);
|
|
if (state == VCPU_RUNNING) {
|
|
/*
|
|
* When a vcpu is "running" the next instruction is determined
|
|
* by adding 'rip' and 'inst_length' in the vcpu's 'exitinfo'.
|
|
* Thus setting 'inst_length' to zero will cause the current
|
|
* instruction to be restarted.
|
|
*/
|
|
vcpu->exitinfo.inst_length = 0;
|
|
VCPU_CTR1(vm, vcpuid, "restarting instruction at %#lx by "
|
|
"setting inst_length to zero", vcpu->exitinfo.rip);
|
|
} else if (state == VCPU_FROZEN) {
|
|
/*
|
|
* When a vcpu is "frozen" it is outside the critical section
|
|
* around VMRUN() and 'nextrip' points to the next instruction.
|
|
* Thus instruction restart is achieved by setting 'nextrip'
|
|
* to the vcpu's %rip.
|
|
*/
|
|
error = vm_get_register(vm, vcpuid, VM_REG_GUEST_RIP, &rip);
|
|
KASSERT(!error, ("%s: error %d getting rip", __func__, error));
|
|
VCPU_CTR2(vm, vcpuid, "restarting instruction by updating "
|
|
"nextrip from %#lx to %#lx", vcpu->nextrip, rip);
|
|
vcpu->nextrip = rip;
|
|
} else {
|
|
panic("%s: invalid state %d", __func__, state);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vm_exit_intinfo(struct vm *vm, int vcpuid, uint64_t info)
|
|
{
|
|
struct vcpu *vcpu;
|
|
int type, vector;
|
|
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
|
|
if (info & VM_INTINFO_VALID) {
|
|
type = info & VM_INTINFO_TYPE;
|
|
vector = info & 0xff;
|
|
if (type == VM_INTINFO_NMI && vector != IDT_NMI)
|
|
return (EINVAL);
|
|
if (type == VM_INTINFO_HWEXCEPTION && vector >= 32)
|
|
return (EINVAL);
|
|
if (info & VM_INTINFO_RSVD)
|
|
return (EINVAL);
|
|
} else {
|
|
info = 0;
|
|
}
|
|
VCPU_CTR2(vm, vcpuid, "%s: info1(%#lx)", __func__, info);
|
|
vcpu->exitintinfo = info;
|
|
return (0);
|
|
}
|
|
|
|
enum exc_class {
|
|
EXC_BENIGN,
|
|
EXC_CONTRIBUTORY,
|
|
EXC_PAGEFAULT
|
|
};
|
|
|
|
#define IDT_VE 20 /* Virtualization Exception (Intel specific) */
|
|
|
|
static enum exc_class
|
|
exception_class(uint64_t info)
|
|
{
|
|
int type, vector;
|
|
|
|
KASSERT(info & VM_INTINFO_VALID, ("intinfo must be valid: %#lx", info));
|
|
type = info & VM_INTINFO_TYPE;
|
|
vector = info & 0xff;
|
|
|
|
/* Table 6-4, "Interrupt and Exception Classes", Intel SDM, Vol 3 */
|
|
switch (type) {
|
|
case VM_INTINFO_HWINTR:
|
|
case VM_INTINFO_SWINTR:
|
|
case VM_INTINFO_NMI:
|
|
return (EXC_BENIGN);
|
|
default:
|
|
/*
|
|
* Hardware exception.
|
|
*
|
|
* SVM and VT-x use identical type values to represent NMI,
|
|
* hardware interrupt and software interrupt.
|
|
*
|
|
* SVM uses type '3' for all exceptions. VT-x uses type '3'
|
|
* for exceptions except #BP and #OF. #BP and #OF use a type
|
|
* value of '5' or '6'. Therefore we don't check for explicit
|
|
* values of 'type' to classify 'intinfo' into a hardware
|
|
* exception.
|
|
*/
|
|
break;
|
|
}
|
|
|
|
switch (vector) {
|
|
case IDT_PF:
|
|
case IDT_VE:
|
|
return (EXC_PAGEFAULT);
|
|
case IDT_DE:
|
|
case IDT_TS:
|
|
case IDT_NP:
|
|
case IDT_SS:
|
|
case IDT_GP:
|
|
return (EXC_CONTRIBUTORY);
|
|
default:
|
|
return (EXC_BENIGN);
|
|
}
|
|
}
|
|
|
|
static int
|
|
nested_fault(struct vm *vm, int vcpuid, uint64_t info1, uint64_t info2,
|
|
uint64_t *retinfo)
|
|
{
|
|
enum exc_class exc1, exc2;
|
|
int type1, vector1;
|
|
|
|
KASSERT(info1 & VM_INTINFO_VALID, ("info1 %#lx is not valid", info1));
|
|
KASSERT(info2 & VM_INTINFO_VALID, ("info2 %#lx is not valid", info2));
|
|
|
|
/*
|
|
* If an exception occurs while attempting to call the double-fault
|
|
* handler the processor enters shutdown mode (aka triple fault).
|
|
*/
|
|
type1 = info1 & VM_INTINFO_TYPE;
|
|
vector1 = info1 & 0xff;
|
|
if (type1 == VM_INTINFO_HWEXCEPTION && vector1 == IDT_DF) {
|
|
VCPU_CTR2(vm, vcpuid, "triple fault: info1(%#lx), info2(%#lx)",
|
|
info1, info2);
|
|
vm_suspend(vm, VM_SUSPEND_TRIPLEFAULT);
|
|
*retinfo = 0;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Table 6-5 "Conditions for Generating a Double Fault", Intel SDM, Vol3
|
|
*/
|
|
exc1 = exception_class(info1);
|
|
exc2 = exception_class(info2);
|
|
if ((exc1 == EXC_CONTRIBUTORY && exc2 == EXC_CONTRIBUTORY) ||
|
|
(exc1 == EXC_PAGEFAULT && exc2 != EXC_BENIGN)) {
|
|
/* Convert nested fault into a double fault. */
|
|
*retinfo = IDT_DF;
|
|
*retinfo |= VM_INTINFO_VALID | VM_INTINFO_HWEXCEPTION;
|
|
*retinfo |= VM_INTINFO_DEL_ERRCODE;
|
|
} else {
|
|
/* Handle exceptions serially */
|
|
*retinfo = info2;
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
static uint64_t
|
|
vcpu_exception_intinfo(struct vcpu *vcpu)
|
|
{
|
|
uint64_t info = 0;
|
|
|
|
if (vcpu->exception_pending) {
|
|
info = vcpu->exc_vector & 0xff;
|
|
info |= VM_INTINFO_VALID | VM_INTINFO_HWEXCEPTION;
|
|
if (vcpu->exc_errcode_valid) {
|
|
info |= VM_INTINFO_DEL_ERRCODE;
|
|
info |= (uint64_t)vcpu->exc_errcode << 32;
|
|
}
|
|
}
|
|
return (info);
|
|
}
|
|
|
|
int
|
|
vm_entry_intinfo(struct vm *vm, int vcpuid, uint64_t *retinfo)
|
|
{
|
|
struct vcpu *vcpu;
|
|
uint64_t info1, info2;
|
|
int valid;
|
|
|
|
KASSERT(vcpuid >= 0 && vcpuid < VM_MAXCPU, ("invalid vcpu %d", vcpuid));
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
|
|
info1 = vcpu->exitintinfo;
|
|
vcpu->exitintinfo = 0;
|
|
|
|
info2 = 0;
|
|
if (vcpu->exception_pending) {
|
|
info2 = vcpu_exception_intinfo(vcpu);
|
|
vcpu->exception_pending = 0;
|
|
VCPU_CTR2(vm, vcpuid, "Exception %d delivered: %#lx",
|
|
vcpu->exc_vector, info2);
|
|
}
|
|
|
|
if ((info1 & VM_INTINFO_VALID) && (info2 & VM_INTINFO_VALID)) {
|
|
valid = nested_fault(vm, vcpuid, info1, info2, retinfo);
|
|
} else if (info1 & VM_INTINFO_VALID) {
|
|
*retinfo = info1;
|
|
valid = 1;
|
|
} else if (info2 & VM_INTINFO_VALID) {
|
|
*retinfo = info2;
|
|
valid = 1;
|
|
} else {
|
|
valid = 0;
|
|
}
|
|
|
|
if (valid) {
|
|
VCPU_CTR4(vm, vcpuid, "%s: info1(%#lx), info2(%#lx), "
|
|
"retinfo(%#lx)", __func__, info1, info2, *retinfo);
|
|
}
|
|
|
|
return (valid);
|
|
}
|
|
|
|
int
|
|
vm_get_intinfo(struct vm *vm, int vcpuid, uint64_t *info1, uint64_t *info2)
|
|
{
|
|
struct vcpu *vcpu;
|
|
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
*info1 = vcpu->exitintinfo;
|
|
*info2 = vcpu_exception_intinfo(vcpu);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vm_inject_exception(struct vm *vm, int vcpuid, int vector, int errcode_valid,
|
|
uint32_t errcode, int restart_instruction)
|
|
{
|
|
struct vcpu *vcpu;
|
|
uint64_t regval;
|
|
int error;
|
|
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
if (vector < 0 || vector >= 32)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* A double fault exception should never be injected directly into
|
|
* the guest. It is a derived exception that results from specific
|
|
* combinations of nested faults.
|
|
*/
|
|
if (vector == IDT_DF)
|
|
return (EINVAL);
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
|
|
if (vcpu->exception_pending) {
|
|
VCPU_CTR2(vm, vcpuid, "Unable to inject exception %d due to "
|
|
"pending exception %d", vector, vcpu->exc_vector);
|
|
return (EBUSY);
|
|
}
|
|
|
|
if (errcode_valid) {
|
|
/*
|
|
* Exceptions don't deliver an error code in real mode.
|
|
*/
|
|
error = vm_get_register(vm, vcpuid, VM_REG_GUEST_CR0, ®val);
|
|
KASSERT(!error, ("%s: error %d getting CR0", __func__, error));
|
|
if (!(regval & CR0_PE))
|
|
errcode_valid = 0;
|
|
}
|
|
|
|
/*
|
|
* From section 26.6.1 "Interruptibility State" in Intel SDM:
|
|
*
|
|
* Event blocking by "STI" or "MOV SS" is cleared after guest executes
|
|
* one instruction or incurs an exception.
|
|
*/
|
|
error = vm_set_register(vm, vcpuid, VM_REG_GUEST_INTR_SHADOW, 0);
|
|
KASSERT(error == 0, ("%s: error %d clearing interrupt shadow",
|
|
__func__, error));
|
|
|
|
if (restart_instruction)
|
|
vm_restart_instruction(vm, vcpuid);
|
|
|
|
vcpu->exception_pending = 1;
|
|
vcpu->exc_vector = vector;
|
|
vcpu->exc_errcode = errcode;
|
|
vcpu->exc_errcode_valid = errcode_valid;
|
|
VCPU_CTR1(vm, vcpuid, "Exception %d pending", vector);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
vm_inject_fault(void *vmarg, int vcpuid, int vector, int errcode_valid,
|
|
int errcode)
|
|
{
|
|
struct vm *vm;
|
|
int error, restart_instruction;
|
|
|
|
vm = vmarg;
|
|
restart_instruction = 1;
|
|
|
|
error = vm_inject_exception(vm, vcpuid, vector, errcode_valid,
|
|
errcode, restart_instruction);
|
|
KASSERT(error == 0, ("vm_inject_exception error %d", error));
|
|
}
|
|
|
|
void
|
|
vm_inject_pf(void *vmarg, int vcpuid, int error_code, uint64_t cr2)
|
|
{
|
|
struct vm *vm;
|
|
int error;
|
|
|
|
vm = vmarg;
|
|
VCPU_CTR2(vm, vcpuid, "Injecting page fault: error_code %#x, cr2 %#lx",
|
|
error_code, cr2);
|
|
|
|
error = vm_set_register(vm, vcpuid, VM_REG_GUEST_CR2, cr2);
|
|
KASSERT(error == 0, ("vm_set_register(cr2) error %d", error));
|
|
|
|
vm_inject_fault(vm, vcpuid, IDT_PF, 1, error_code);
|
|
}
|
|
|
|
static VMM_STAT(VCPU_NMI_COUNT, "number of NMIs delivered to vcpu");
|
|
|
|
int
|
|
vm_inject_nmi(struct vm *vm, int vcpuid)
|
|
{
|
|
struct vcpu *vcpu;
|
|
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
|
|
vcpu->nmi_pending = 1;
|
|
vcpu_notify_event(vm, vcpuid, false);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vm_nmi_pending(struct vm *vm, int vcpuid)
|
|
{
|
|
struct vcpu *vcpu;
|
|
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
panic("vm_nmi_pending: invalid vcpuid %d", vcpuid);
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
|
|
return (vcpu->nmi_pending);
|
|
}
|
|
|
|
void
|
|
vm_nmi_clear(struct vm *vm, int vcpuid)
|
|
{
|
|
struct vcpu *vcpu;
|
|
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
panic("vm_nmi_pending: invalid vcpuid %d", vcpuid);
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
|
|
if (vcpu->nmi_pending == 0)
|
|
panic("vm_nmi_clear: inconsistent nmi_pending state");
|
|
|
|
vcpu->nmi_pending = 0;
|
|
vmm_stat_incr(vm, vcpuid, VCPU_NMI_COUNT, 1);
|
|
}
|
|
|
|
static VMM_STAT(VCPU_EXTINT_COUNT, "number of ExtINTs delivered to vcpu");
|
|
|
|
int
|
|
vm_inject_extint(struct vm *vm, int vcpuid)
|
|
{
|
|
struct vcpu *vcpu;
|
|
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
|
|
vcpu->extint_pending = 1;
|
|
vcpu_notify_event(vm, vcpuid, false);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vm_extint_pending(struct vm *vm, int vcpuid)
|
|
{
|
|
struct vcpu *vcpu;
|
|
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
panic("vm_extint_pending: invalid vcpuid %d", vcpuid);
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
|
|
return (vcpu->extint_pending);
|
|
}
|
|
|
|
void
|
|
vm_extint_clear(struct vm *vm, int vcpuid)
|
|
{
|
|
struct vcpu *vcpu;
|
|
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
panic("vm_extint_pending: invalid vcpuid %d", vcpuid);
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
|
|
if (vcpu->extint_pending == 0)
|
|
panic("vm_extint_clear: inconsistent extint_pending state");
|
|
|
|
vcpu->extint_pending = 0;
|
|
vmm_stat_incr(vm, vcpuid, VCPU_EXTINT_COUNT, 1);
|
|
}
|
|
|
|
int
|
|
vm_get_capability(struct vm *vm, int vcpu, int type, int *retval)
|
|
{
|
|
if (vcpu < 0 || vcpu >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
if (type < 0 || type >= VM_CAP_MAX)
|
|
return (EINVAL);
|
|
|
|
return (VMGETCAP(vm->cookie, vcpu, type, retval));
|
|
}
|
|
|
|
int
|
|
vm_set_capability(struct vm *vm, int vcpu, int type, int val)
|
|
{
|
|
if (vcpu < 0 || vcpu >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
if (type < 0 || type >= VM_CAP_MAX)
|
|
return (EINVAL);
|
|
|
|
return (VMSETCAP(vm->cookie, vcpu, type, val));
|
|
}
|
|
|
|
struct vlapic *
|
|
vm_lapic(struct vm *vm, int cpu)
|
|
{
|
|
return (vm->vcpu[cpu].vlapic);
|
|
}
|
|
|
|
struct vioapic *
|
|
vm_ioapic(struct vm *vm)
|
|
{
|
|
|
|
return (vm->vioapic);
|
|
}
|
|
|
|
struct vhpet *
|
|
vm_hpet(struct vm *vm)
|
|
{
|
|
|
|
return (vm->vhpet);
|
|
}
|
|
|
|
boolean_t
|
|
vmm_is_pptdev(int bus, int slot, int func)
|
|
{
|
|
int found, i, n;
|
|
int b, s, f;
|
|
char *val, *cp, *cp2;
|
|
|
|
/*
|
|
* XXX
|
|
* The length of an environment variable is limited to 128 bytes which
|
|
* puts an upper limit on the number of passthru devices that may be
|
|
* specified using a single environment variable.
|
|
*
|
|
* Work around this by scanning multiple environment variable
|
|
* names instead of a single one - yuck!
|
|
*/
|
|
const char *names[] = { "pptdevs", "pptdevs2", "pptdevs3", NULL };
|
|
|
|
/* set pptdevs="1/2/3 4/5/6 7/8/9 10/11/12" */
|
|
found = 0;
|
|
for (i = 0; names[i] != NULL && !found; i++) {
|
|
cp = val = kern_getenv(names[i]);
|
|
while (cp != NULL && *cp != '\0') {
|
|
if ((cp2 = strchr(cp, ' ')) != NULL)
|
|
*cp2 = '\0';
|
|
|
|
n = sscanf(cp, "%d/%d/%d", &b, &s, &f);
|
|
if (n == 3 && bus == b && slot == s && func == f) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
|
|
if (cp2 != NULL)
|
|
*cp2++ = ' ';
|
|
|
|
cp = cp2;
|
|
}
|
|
freeenv(val);
|
|
}
|
|
return (found);
|
|
}
|
|
|
|
void *
|
|
vm_iommu_domain(struct vm *vm)
|
|
{
|
|
|
|
return (vm->iommu);
|
|
}
|
|
|
|
int
|
|
vcpu_set_state(struct vm *vm, int vcpuid, enum vcpu_state newstate,
|
|
bool from_idle)
|
|
{
|
|
int error;
|
|
struct vcpu *vcpu;
|
|
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
panic("vm_set_run_state: invalid vcpuid %d", vcpuid);
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
|
|
vcpu_lock(vcpu);
|
|
error = vcpu_set_state_locked(vm, vcpuid, newstate, from_idle);
|
|
vcpu_unlock(vcpu);
|
|
|
|
return (error);
|
|
}
|
|
|
|
enum vcpu_state
|
|
vcpu_get_state(struct vm *vm, int vcpuid, int *hostcpu)
|
|
{
|
|
struct vcpu *vcpu;
|
|
enum vcpu_state state;
|
|
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
panic("vm_get_run_state: invalid vcpuid %d", vcpuid);
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
|
|
vcpu_lock(vcpu);
|
|
state = vcpu->state;
|
|
if (hostcpu != NULL)
|
|
*hostcpu = vcpu->hostcpu;
|
|
vcpu_unlock(vcpu);
|
|
|
|
return (state);
|
|
}
|
|
|
|
int
|
|
vm_activate_cpu(struct vm *vm, int vcpuid)
|
|
{
|
|
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
if (CPU_ISSET(vcpuid, &vm->active_cpus))
|
|
return (EBUSY);
|
|
|
|
VCPU_CTR0(vm, vcpuid, "activated");
|
|
CPU_SET_ATOMIC(vcpuid, &vm->active_cpus);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vm_suspend_cpu(struct vm *vm, int vcpuid)
|
|
{
|
|
int i;
|
|
|
|
if (vcpuid < -1 || vcpuid >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
if (vcpuid == -1) {
|
|
vm->debug_cpus = vm->active_cpus;
|
|
for (i = 0; i < VM_MAXCPU; i++) {
|
|
if (CPU_ISSET(i, &vm->active_cpus))
|
|
vcpu_notify_event(vm, i, false);
|
|
}
|
|
} else {
|
|
if (!CPU_ISSET(vcpuid, &vm->active_cpus))
|
|
return (EINVAL);
|
|
|
|
CPU_SET_ATOMIC(vcpuid, &vm->debug_cpus);
|
|
vcpu_notify_event(vm, vcpuid, false);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vm_resume_cpu(struct vm *vm, int vcpuid)
|
|
{
|
|
|
|
if (vcpuid < -1 || vcpuid >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
if (vcpuid == -1) {
|
|
CPU_ZERO(&vm->debug_cpus);
|
|
} else {
|
|
if (!CPU_ISSET(vcpuid, &vm->debug_cpus))
|
|
return (EINVAL);
|
|
|
|
CPU_CLR_ATOMIC(vcpuid, &vm->debug_cpus);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vcpu_debugged(struct vm *vm, int vcpuid)
|
|
{
|
|
|
|
return (CPU_ISSET(vcpuid, &vm->debug_cpus));
|
|
}
|
|
|
|
cpuset_t
|
|
vm_active_cpus(struct vm *vm)
|
|
{
|
|
|
|
return (vm->active_cpus);
|
|
}
|
|
|
|
cpuset_t
|
|
vm_debug_cpus(struct vm *vm)
|
|
{
|
|
|
|
return (vm->debug_cpus);
|
|
}
|
|
|
|
cpuset_t
|
|
vm_suspended_cpus(struct vm *vm)
|
|
{
|
|
|
|
return (vm->suspended_cpus);
|
|
}
|
|
|
|
void *
|
|
vcpu_stats(struct vm *vm, int vcpuid)
|
|
{
|
|
|
|
return (vm->vcpu[vcpuid].stats);
|
|
}
|
|
|
|
int
|
|
vm_get_x2apic_state(struct vm *vm, int vcpuid, enum x2apic_state *state)
|
|
{
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
*state = vm->vcpu[vcpuid].x2apic_state;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vm_set_x2apic_state(struct vm *vm, int vcpuid, enum x2apic_state state)
|
|
{
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
if (state >= X2APIC_STATE_LAST)
|
|
return (EINVAL);
|
|
|
|
vm->vcpu[vcpuid].x2apic_state = state;
|
|
|
|
vlapic_set_x2apic_state(vm, vcpuid, state);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* This function is called to ensure that a vcpu "sees" a pending event
|
|
* as soon as possible:
|
|
* - If the vcpu thread is sleeping then it is woken up.
|
|
* - If the vcpu is running on a different host_cpu then an IPI will be directed
|
|
* to the host_cpu to cause the vcpu to trap into the hypervisor.
|
|
*/
|
|
static void
|
|
vcpu_notify_event_locked(struct vcpu *vcpu, bool lapic_intr)
|
|
{
|
|
int hostcpu;
|
|
|
|
hostcpu = vcpu->hostcpu;
|
|
if (vcpu->state == VCPU_RUNNING) {
|
|
KASSERT(hostcpu != NOCPU, ("vcpu running on invalid hostcpu"));
|
|
if (hostcpu != curcpu) {
|
|
if (lapic_intr) {
|
|
vlapic_post_intr(vcpu->vlapic, hostcpu,
|
|
vmm_ipinum);
|
|
} else {
|
|
ipi_cpu(hostcpu, vmm_ipinum);
|
|
}
|
|
} else {
|
|
/*
|
|
* If the 'vcpu' is running on 'curcpu' then it must
|
|
* be sending a notification to itself (e.g. SELF_IPI).
|
|
* The pending event will be picked up when the vcpu
|
|
* transitions back to guest context.
|
|
*/
|
|
}
|
|
} else {
|
|
KASSERT(hostcpu == NOCPU, ("vcpu state %d not consistent "
|
|
"with hostcpu %d", vcpu->state, hostcpu));
|
|
if (vcpu->state == VCPU_SLEEPING)
|
|
wakeup_one(vcpu);
|
|
}
|
|
}
|
|
|
|
void
|
|
vcpu_notify_event(struct vm *vm, int vcpuid, bool lapic_intr)
|
|
{
|
|
struct vcpu *vcpu = &vm->vcpu[vcpuid];
|
|
|
|
vcpu_lock(vcpu);
|
|
vcpu_notify_event_locked(vcpu, lapic_intr);
|
|
vcpu_unlock(vcpu);
|
|
}
|
|
|
|
struct vmspace *
|
|
vm_get_vmspace(struct vm *vm)
|
|
{
|
|
|
|
return (vm->vmspace);
|
|
}
|
|
|
|
int
|
|
vm_apicid2vcpuid(struct vm *vm, int apicid)
|
|
{
|
|
/*
|
|
* XXX apic id is assumed to be numerically identical to vcpu id
|
|
*/
|
|
return (apicid);
|
|
}
|
|
|
|
void
|
|
vm_smp_rendezvous(struct vm *vm, int vcpuid, cpuset_t dest,
|
|
vm_rendezvous_func_t func, void *arg)
|
|
{
|
|
int i;
|
|
|
|
/*
|
|
* Enforce that this function is called without any locks
|
|
*/
|
|
WITNESS_WARN(WARN_PANIC, NULL, "vm_smp_rendezvous");
|
|
KASSERT(vcpuid == -1 || (vcpuid >= 0 && vcpuid < VM_MAXCPU),
|
|
("vm_smp_rendezvous: invalid vcpuid %d", vcpuid));
|
|
|
|
restart:
|
|
mtx_lock(&vm->rendezvous_mtx);
|
|
if (vm->rendezvous_func != NULL) {
|
|
/*
|
|
* If a rendezvous is already in progress then we need to
|
|
* call the rendezvous handler in case this 'vcpuid' is one
|
|
* of the targets of the rendezvous.
|
|
*/
|
|
RENDEZVOUS_CTR0(vm, vcpuid, "Rendezvous already in progress");
|
|
mtx_unlock(&vm->rendezvous_mtx);
|
|
vm_handle_rendezvous(vm, vcpuid);
|
|
goto restart;
|
|
}
|
|
KASSERT(vm->rendezvous_func == NULL, ("vm_smp_rendezvous: previous "
|
|
"rendezvous is still in progress"));
|
|
|
|
RENDEZVOUS_CTR0(vm, vcpuid, "Initiating rendezvous");
|
|
vm->rendezvous_req_cpus = dest;
|
|
CPU_ZERO(&vm->rendezvous_done_cpus);
|
|
vm->rendezvous_arg = arg;
|
|
vm_set_rendezvous_func(vm, func);
|
|
mtx_unlock(&vm->rendezvous_mtx);
|
|
|
|
/*
|
|
* Wake up any sleeping vcpus and trigger a VM-exit in any running
|
|
* vcpus so they handle the rendezvous as soon as possible.
|
|
*/
|
|
for (i = 0; i < VM_MAXCPU; i++) {
|
|
if (CPU_ISSET(i, &dest))
|
|
vcpu_notify_event(vm, i, false);
|
|
}
|
|
|
|
vm_handle_rendezvous(vm, vcpuid);
|
|
}
|
|
|
|
struct vatpic *
|
|
vm_atpic(struct vm *vm)
|
|
{
|
|
return (vm->vatpic);
|
|
}
|
|
|
|
struct vatpit *
|
|
vm_atpit(struct vm *vm)
|
|
{
|
|
return (vm->vatpit);
|
|
}
|
|
|
|
struct vpmtmr *
|
|
vm_pmtmr(struct vm *vm)
|
|
{
|
|
|
|
return (vm->vpmtmr);
|
|
}
|
|
|
|
struct vrtc *
|
|
vm_rtc(struct vm *vm)
|
|
{
|
|
|
|
return (vm->vrtc);
|
|
}
|
|
|
|
enum vm_reg_name
|
|
vm_segment_name(int seg)
|
|
{
|
|
static enum vm_reg_name seg_names[] = {
|
|
VM_REG_GUEST_ES,
|
|
VM_REG_GUEST_CS,
|
|
VM_REG_GUEST_SS,
|
|
VM_REG_GUEST_DS,
|
|
VM_REG_GUEST_FS,
|
|
VM_REG_GUEST_GS
|
|
};
|
|
|
|
KASSERT(seg >= 0 && seg < nitems(seg_names),
|
|
("%s: invalid segment encoding %d", __func__, seg));
|
|
return (seg_names[seg]);
|
|
}
|
|
|
|
void
|
|
vm_copy_teardown(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo,
|
|
int num_copyinfo)
|
|
{
|
|
int idx;
|
|
|
|
for (idx = 0; idx < num_copyinfo; idx++) {
|
|
if (copyinfo[idx].cookie != NULL)
|
|
vm_gpa_release(copyinfo[idx].cookie);
|
|
}
|
|
bzero(copyinfo, num_copyinfo * sizeof(struct vm_copyinfo));
|
|
}
|
|
|
|
int
|
|
vm_copy_setup(struct vm *vm, int vcpuid, struct vm_guest_paging *paging,
|
|
uint64_t gla, size_t len, int prot, struct vm_copyinfo *copyinfo,
|
|
int num_copyinfo, int *fault)
|
|
{
|
|
int error, idx, nused;
|
|
size_t n, off, remaining;
|
|
void *hva, *cookie;
|
|
uint64_t gpa;
|
|
|
|
bzero(copyinfo, sizeof(struct vm_copyinfo) * num_copyinfo);
|
|
|
|
nused = 0;
|
|
remaining = len;
|
|
while (remaining > 0) {
|
|
KASSERT(nused < num_copyinfo, ("insufficient vm_copyinfo"));
|
|
error = vm_gla2gpa(vm, vcpuid, paging, gla, prot, &gpa, fault);
|
|
if (error || *fault)
|
|
return (error);
|
|
off = gpa & PAGE_MASK;
|
|
n = min(remaining, PAGE_SIZE - off);
|
|
copyinfo[nused].gpa = gpa;
|
|
copyinfo[nused].len = n;
|
|
remaining -= n;
|
|
gla += n;
|
|
nused++;
|
|
}
|
|
|
|
for (idx = 0; idx < nused; idx++) {
|
|
hva = vm_gpa_hold(vm, vcpuid, copyinfo[idx].gpa,
|
|
copyinfo[idx].len, prot, &cookie);
|
|
if (hva == NULL)
|
|
break;
|
|
copyinfo[idx].hva = hva;
|
|
copyinfo[idx].cookie = cookie;
|
|
}
|
|
|
|
if (idx != nused) {
|
|
vm_copy_teardown(vm, vcpuid, copyinfo, num_copyinfo);
|
|
return (EFAULT);
|
|
} else {
|
|
*fault = 0;
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
void
|
|
vm_copyin(struct vm *vm, int vcpuid, struct vm_copyinfo *copyinfo, void *kaddr,
|
|
size_t len)
|
|
{
|
|
char *dst;
|
|
int idx;
|
|
|
|
dst = kaddr;
|
|
idx = 0;
|
|
while (len > 0) {
|
|
bcopy(copyinfo[idx].hva, dst, copyinfo[idx].len);
|
|
len -= copyinfo[idx].len;
|
|
dst += copyinfo[idx].len;
|
|
idx++;
|
|
}
|
|
}
|
|
|
|
void
|
|
vm_copyout(struct vm *vm, int vcpuid, const void *kaddr,
|
|
struct vm_copyinfo *copyinfo, size_t len)
|
|
{
|
|
const char *src;
|
|
int idx;
|
|
|
|
src = kaddr;
|
|
idx = 0;
|
|
while (len > 0) {
|
|
bcopy(src, copyinfo[idx].hva, copyinfo[idx].len);
|
|
len -= copyinfo[idx].len;
|
|
src += copyinfo[idx].len;
|
|
idx++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Return the amount of in-use and wired memory for the VM. Since
|
|
* these are global stats, only return the values with for vCPU 0
|
|
*/
|
|
VMM_STAT_DECLARE(VMM_MEM_RESIDENT);
|
|
VMM_STAT_DECLARE(VMM_MEM_WIRED);
|
|
|
|
static void
|
|
vm_get_rescnt(struct vm *vm, int vcpu, struct vmm_stat_type *stat)
|
|
{
|
|
|
|
if (vcpu == 0) {
|
|
vmm_stat_set(vm, vcpu, VMM_MEM_RESIDENT,
|
|
PAGE_SIZE * vmspace_resident_count(vm->vmspace));
|
|
}
|
|
}
|
|
|
|
static void
|
|
vm_get_wiredcnt(struct vm *vm, int vcpu, struct vmm_stat_type *stat)
|
|
{
|
|
|
|
if (vcpu == 0) {
|
|
vmm_stat_set(vm, vcpu, VMM_MEM_WIRED,
|
|
PAGE_SIZE * pmap_wired_count(vmspace_pmap(vm->vmspace)));
|
|
}
|
|
}
|
|
|
|
VMM_STAT_FUNC(VMM_MEM_RESIDENT, "Resident memory", vm_get_rescnt);
|
|
VMM_STAT_FUNC(VMM_MEM_WIRED, "Wired memory", vm_get_wiredcnt);
|