aacc216bbf
This is the change where the bhyve_npt_pmap branch was merged in to head. The SVM changes to work with this will be in a follow-on submit.
1317 lines
27 KiB
C
1317 lines
27 KiB
C
/*-
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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/vm.h>
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#include <machine/pcb.h>
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#include <machine/smp.h>
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#include <x86/apicreg.h>
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#include <machine/pmap.h>
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#include <machine/vmparam.h>
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#include <machine/vmm.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 <machine/vmm_dev.h>
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#include "vlapic.h"
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#include "vmm_msr.h"
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#include "vmm_ipi.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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struct vcpu {
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int flags;
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enum vcpu_state state;
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struct mtx mtx;
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int hostcpu; /* host cpuid this vcpu last ran on */
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uint64_t guest_msrs[VMM_MSR_NUM];
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struct vlapic *vlapic;
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int vcpuid;
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struct savefpu *guestfpu; /* guest fpu state */
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void *stats;
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struct vm_exit exitinfo;
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enum x2apic_state x2apic_state;
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int nmi_pending;
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};
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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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vm_paddr_t gpa;
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size_t len;
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boolean_t wired;
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vm_object_t object;
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};
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#define VM_MAX_MEMORY_SEGMENTS 2
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struct vm {
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void *cookie; /* processor-specific data */
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void *iommu; /* iommu-specific data */
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struct vmspace *vmspace; /* guest's address space */
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struct vcpu vcpu[VM_MAXCPU];
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int num_mem_segs;
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struct mem_seg mem_segs[VM_MAX_MEMORY_SEGMENTS];
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char name[VM_MAX_NAMELEN];
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/*
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* Set of active vcpus.
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* An active vcpu is one that has been started implicitly (BSP) or
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* explicitly (AP) by sending it a startup ipi.
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*/
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cpuset_t active_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() (ops != NULL ? (*ops->init)() : 0)
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#define VMM_CLEANUP() (ops != NULL ? (*ops->cleanup)() : 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) \
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(ops != NULL ? (*ops->vmrun)(vmi, vcpu, rip, pmap) : 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 VMINJECT(vmi, vcpu, type, vec, ec, ecv) \
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(ops != NULL ? (*ops->vminject)(vmi, vcpu, type, vec, ec, ecv) : 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 fpu_start_emulating() load_cr0(rcr0() | CR0_TS)
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#define fpu_stop_emulating() clts()
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static MALLOC_DEFINE(M_VM, "vm", "vm");
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CTASSERT(VMM_MSR_NUM <= 64); /* msr_mask can keep track of up to 64 msrs */
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/* statistics */
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static VMM_STAT(VCPU_TOTAL_RUNTIME, "vcpu total runtime");
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static void
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vcpu_cleanup(struct vcpu *vcpu)
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{
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vlapic_cleanup(vcpu->vlapic);
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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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static void
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vcpu_init(struct vm *vm, uint32_t vcpu_id)
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{
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struct vcpu *vcpu;
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vcpu = &vm->vcpu[vcpu_id];
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vcpu_lock_init(vcpu);
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vcpu->hostcpu = NOCPU;
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vcpu->vcpuid = vcpu_id;
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vcpu->vlapic = vlapic_init(vm, vcpu_id);
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vm_set_x2apic_state(vm, vcpu_id, X2APIC_ENABLED);
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vcpu->guestfpu = fpu_save_area_alloc();
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fpu_save_area_reset(vcpu->guestfpu);
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vcpu->stats = vmm_stat_alloc();
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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 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_ipi_init();
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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_msr_init();
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return (VMM_INIT());
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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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iommu_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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iommu_cleanup();
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vmm_ipi_cleanup();
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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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* - iommu initialization must happen after the pci passthru driver has had
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* a chance to attach to any passthru devices (after SI_SUB_CONFIGURE).
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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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SYSCTL_NODE(_hw, OID_AUTO, vmm, CTLFLAG_RW, NULL, NULL);
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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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int i;
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struct vm *vm;
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struct vmspace *vmspace;
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const int BSP = 0;
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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(VM_MIN_ADDRESS, 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->cookie = VMINIT(vm, vmspace_pmap(vmspace));
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for (i = 0; i < VM_MAXCPU; i++) {
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vcpu_init(vm, i);
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guest_msrs_init(vm, i);
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}
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vm_activate_cpu(vm, BSP);
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vm->vmspace = vmspace;
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*retvm = vm;
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return (0);
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}
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static void
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vm_free_mem_seg(struct vm *vm, struct mem_seg *seg)
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{
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if (seg->object != NULL)
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vmm_mem_free(vm->vmspace, seg->gpa, seg->len);
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bzero(seg, sizeof(*seg));
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}
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void
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vm_destroy(struct vm *vm)
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{
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int i;
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ppt_unassign_all(vm);
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if (vm->iommu != NULL)
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iommu_destroy_domain(vm->iommu);
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for (i = 0; i < vm->num_mem_segs; i++)
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vm_free_mem_seg(vm, &vm->mem_segs[i]);
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vm->num_mem_segs = 0;
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for (i = 0; i < VM_MAXCPU; i++)
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vcpu_cleanup(&vm->vcpu[i]);
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VMSPACE_FREE(vm->vmspace);
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VMCLEANUP(vm->cookie);
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free(vm, M_VM);
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}
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const char *
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vm_name(struct vm *vm)
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{
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return (vm->name);
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}
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int
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vm_map_mmio(struct vm *vm, vm_paddr_t gpa, size_t len, vm_paddr_t hpa)
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{
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vm_object_t obj;
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if ((obj = vmm_mmio_alloc(vm->vmspace, gpa, len, hpa)) == NULL)
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return (ENOMEM);
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else
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return (0);
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}
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int
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vm_unmap_mmio(struct vm *vm, vm_paddr_t gpa, size_t len)
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{
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vmm_mmio_free(vm->vmspace, gpa, len);
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return (0);
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}
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boolean_t
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vm_mem_allocated(struct vm *vm, vm_paddr_t gpa)
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{
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int i;
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vm_paddr_t gpabase, gpalimit;
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for (i = 0; i < vm->num_mem_segs; i++) {
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gpabase = vm->mem_segs[i].gpa;
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gpalimit = gpabase + vm->mem_segs[i].len;
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if (gpa >= gpabase && gpa < gpalimit)
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return (TRUE); /* 'gpa' is regular memory */
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}
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if (ppt_is_mmio(vm, gpa))
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return (TRUE); /* 'gpa' is pci passthru mmio */
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return (FALSE);
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}
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int
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vm_malloc(struct vm *vm, vm_paddr_t gpa, size_t len)
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{
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int available, allocated;
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struct mem_seg *seg;
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vm_object_t object;
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vm_paddr_t g;
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if ((gpa & PAGE_MASK) || (len & PAGE_MASK) || len == 0)
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return (EINVAL);
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available = allocated = 0;
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g = gpa;
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while (g < gpa + len) {
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if (vm_mem_allocated(vm, g))
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allocated++;
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else
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available++;
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g += PAGE_SIZE;
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}
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/*
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* If there are some allocated and some available pages in the address
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* range then it is an error.
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*/
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if (allocated && available)
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return (EINVAL);
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/*
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* If the entire address range being requested has already been
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* allocated then there isn't anything more to do.
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*/
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if (allocated && available == 0)
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return (0);
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if (vm->num_mem_segs >= VM_MAX_MEMORY_SEGMENTS)
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return (E2BIG);
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seg = &vm->mem_segs[vm->num_mem_segs];
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if ((object = vmm_mem_alloc(vm->vmspace, gpa, len)) == NULL)
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return (ENOMEM);
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seg->gpa = gpa;
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seg->len = len;
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seg->object = object;
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seg->wired = FALSE;
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vm->num_mem_segs++;
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return (0);
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}
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static void
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vm_gpa_unwire(struct vm *vm)
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{
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int i, rv;
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struct mem_seg *seg;
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for (i = 0; i < vm->num_mem_segs; i++) {
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seg = &vm->mem_segs[i];
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if (!seg->wired)
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continue;
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rv = vm_map_unwire(&vm->vmspace->vm_map,
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seg->gpa, seg->gpa + seg->len,
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VM_MAP_WIRE_USER | VM_MAP_WIRE_NOHOLES);
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KASSERT(rv == KERN_SUCCESS, ("vm(%s) memory segment "
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"%#lx/%ld could not be unwired: %d",
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vm_name(vm), seg->gpa, seg->len, rv));
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seg->wired = FALSE;
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}
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}
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static int
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vm_gpa_wire(struct vm *vm)
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{
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int i, rv;
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struct mem_seg *seg;
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for (i = 0; i < vm->num_mem_segs; i++) {
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seg = &vm->mem_segs[i];
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if (seg->wired)
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continue;
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/* XXX rlimits? */
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rv = vm_map_wire(&vm->vmspace->vm_map,
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seg->gpa, seg->gpa + seg->len,
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VM_MAP_WIRE_USER | VM_MAP_WIRE_NOHOLES);
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if (rv != KERN_SUCCESS)
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break;
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seg->wired = TRUE;
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}
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if (i < vm->num_mem_segs) {
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/*
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* Undo the wiring before returning an error.
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*/
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vm_gpa_unwire(vm);
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return (EAGAIN);
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}
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return (0);
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}
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static void
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vm_iommu_modify(struct vm *vm, boolean_t map)
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{
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int i, sz;
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vm_paddr_t gpa, hpa;
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struct mem_seg *seg;
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void *vp, *cookie, *host_domain;
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sz = PAGE_SIZE;
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host_domain = iommu_host_domain();
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for (i = 0; i < vm->num_mem_segs; i++) {
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seg = &vm->mem_segs[i];
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KASSERT(seg->wired, ("vm(%s) memory segment %#lx/%ld not wired",
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vm_name(vm), seg->gpa, seg->len));
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|
|
gpa = seg->gpa;
|
|
while (gpa < seg->gpa + seg->len) {
|
|
vp = vm_gpa_hold(vm, 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_num_devices(vm) == 0) {
|
|
vm_iommu_unmap(vm);
|
|
vm_gpa_unwire(vm);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vm_assign_pptdev(struct vm *vm, int bus, int slot, int func)
|
|
{
|
|
int error;
|
|
vm_paddr_t maxaddr;
|
|
|
|
/*
|
|
* Virtual machines with pci passthru devices get special treatment:
|
|
* - the guest physical memory is wired
|
|
* - the iommu is programmed to do the 'gpa' to 'hpa' translation
|
|
*
|
|
* We need to do this before the first pci passthru device is attached.
|
|
*/
|
|
if (ppt_num_devices(vm) == 0) {
|
|
KASSERT(vm->iommu == NULL,
|
|
("vm_assign_pptdev: iommu must be NULL"));
|
|
maxaddr = vmm_mem_maxaddr();
|
|
vm->iommu = iommu_create_domain(maxaddr);
|
|
|
|
error = vm_gpa_wire(vm);
|
|
if (error)
|
|
return (error);
|
|
|
|
vm_iommu_map(vm);
|
|
}
|
|
|
|
error = ppt_assign_device(vm, bus, slot, func);
|
|
return (error);
|
|
}
|
|
|
|
void *
|
|
vm_gpa_hold(struct vm *vm, vm_paddr_t gpa, size_t len, int reqprot,
|
|
void **cookie)
|
|
{
|
|
int count, pageoff;
|
|
vm_page_t m;
|
|
|
|
pageoff = gpa & PAGE_MASK;
|
|
if (len > PAGE_SIZE - pageoff)
|
|
panic("vm_gpa_hold: invalid gpa/len: 0x%016lx/%lu", gpa, len);
|
|
|
|
count = vm_fault_quick_hold_pages(&vm->vmspace->vm_map,
|
|
trunc_page(gpa), PAGE_SIZE, reqprot, &m, 1);
|
|
|
|
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_gpabase2memseg(struct vm *vm, vm_paddr_t gpabase,
|
|
struct vm_memory_segment *seg)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < vm->num_mem_segs; i++) {
|
|
if (gpabase == vm->mem_segs[i].gpa) {
|
|
seg->gpa = vm->mem_segs[i].gpa;
|
|
seg->len = vm->mem_segs[i].len;
|
|
seg->wired = vm->mem_segs[i].wired;
|
|
return (0);
|
|
}
|
|
}
|
|
return (-1);
|
|
}
|
|
|
|
int
|
|
vm_get_memobj(struct vm *vm, vm_paddr_t gpa, size_t len,
|
|
vm_offset_t *offset, struct vm_object **object)
|
|
{
|
|
int i;
|
|
size_t seg_len;
|
|
vm_paddr_t seg_gpa;
|
|
vm_object_t seg_obj;
|
|
|
|
for (i = 0; i < vm->num_mem_segs; i++) {
|
|
if ((seg_obj = vm->mem_segs[i].object) == NULL)
|
|
continue;
|
|
|
|
seg_gpa = vm->mem_segs[i].gpa;
|
|
seg_len = vm->mem_segs[i].len;
|
|
|
|
if (gpa >= seg_gpa && gpa < seg_gpa + seg_len) {
|
|
*offset = gpa - seg_gpa;
|
|
*object = seg_obj;
|
|
vm_object_reference(seg_obj);
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
return (EINVAL);
|
|
}
|
|
|
|
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 vcpu, int reg, uint64_t val)
|
|
{
|
|
|
|
if (vcpu < 0 || vcpu >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
if (reg >= VM_REG_LAST)
|
|
return (EINVAL);
|
|
|
|
return (VMSETREG(vm->cookie, vcpu, reg, val));
|
|
}
|
|
|
|
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);
|
|
|
|
/*
|
|
* 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 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 vcpu *vcpu, enum vcpu_state newstate)
|
|
{
|
|
int error;
|
|
|
|
vcpu_assert_locked(vcpu);
|
|
|
|
/*
|
|
* 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 == 0)
|
|
vcpu->state = newstate;
|
|
else
|
|
error = EBUSY;
|
|
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
vcpu_require_state(struct vm *vm, int vcpuid, enum vcpu_state newstate)
|
|
{
|
|
int error;
|
|
|
|
if ((error = vcpu_set_state(vm, vcpuid, newstate)) != 0)
|
|
panic("Error %d setting state to %d\n", error, newstate);
|
|
}
|
|
|
|
static void
|
|
vcpu_require_state_locked(struct vcpu *vcpu, enum vcpu_state newstate)
|
|
{
|
|
int error;
|
|
|
|
if ((error = vcpu_set_state_locked(vcpu, newstate)) != 0)
|
|
panic("Error %d setting state to %d", error, newstate);
|
|
}
|
|
|
|
/*
|
|
* Emulate a guest 'hlt' by sleeping until the vcpu is ready to run.
|
|
*/
|
|
static int
|
|
vm_handle_hlt(struct vm *vm, int vcpuid, boolean_t *retu)
|
|
{
|
|
struct vcpu *vcpu;
|
|
int sleepticks, t;
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
|
|
vcpu_lock(vcpu);
|
|
|
|
/*
|
|
* Figure out the number of host ticks until the next apic
|
|
* timer interrupt in the guest.
|
|
*/
|
|
sleepticks = lapic_timer_tick(vm, vcpuid);
|
|
|
|
/*
|
|
* If the guest local apic timer is disabled then sleep for
|
|
* a long time but not forever.
|
|
*/
|
|
if (sleepticks < 0)
|
|
sleepticks = hz;
|
|
|
|
/*
|
|
* Do a final check for pending NMI or interrupts before
|
|
* really putting this thread to sleep.
|
|
*
|
|
* These interrupts could have happened any time after we
|
|
* returned from VMRUN() and before we grabbed the vcpu lock.
|
|
*/
|
|
if (!vm_nmi_pending(vm, vcpuid) && lapic_pending_intr(vm, vcpuid) < 0) {
|
|
if (sleepticks <= 0)
|
|
panic("invalid sleepticks %d", sleepticks);
|
|
t = ticks;
|
|
vcpu_require_state_locked(vcpu, VCPU_SLEEPING);
|
|
msleep_spin(vcpu, &vcpu->mtx, "vmidle", sleepticks);
|
|
vcpu_require_state_locked(vcpu, VCPU_FROZEN);
|
|
vmm_stat_incr(vm, vcpuid, VCPU_IDLE_TICKS, ticks - t);
|
|
}
|
|
vcpu_unlock(vcpu);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vm_handle_paging(struct vm *vm, int vcpuid, boolean_t *retu)
|
|
{
|
|
int rv, ftype;
|
|
struct vm_map *map;
|
|
struct vcpu *vcpu;
|
|
struct vm_exit *vme;
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
vme = &vcpu->exitinfo;
|
|
|
|
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)
|
|
goto done;
|
|
}
|
|
|
|
map = &vm->vmspace->vm_map;
|
|
rv = vm_fault(map, vme->u.paging.gpa, ftype, VM_FAULT_NORMAL);
|
|
|
|
VMM_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:
|
|
/* restart execution at the faulting instruction */
|
|
vme->inst_length = 0;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
vm_handle_inst_emul(struct vm *vm, int vcpuid, boolean_t *retu)
|
|
{
|
|
struct vie *vie;
|
|
struct vcpu *vcpu;
|
|
struct vm_exit *vme;
|
|
int error, inst_length;
|
|
uint64_t rip, gla, gpa, cr3;
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
vme = &vcpu->exitinfo;
|
|
|
|
rip = vme->rip;
|
|
inst_length = vme->inst_length;
|
|
|
|
gla = vme->u.inst_emul.gla;
|
|
gpa = vme->u.inst_emul.gpa;
|
|
cr3 = vme->u.inst_emul.cr3;
|
|
vie = &vme->u.inst_emul.vie;
|
|
|
|
vie_init(vie);
|
|
|
|
/* Fetch, decode and emulate the faulting instruction */
|
|
if (vmm_fetch_instruction(vm, vcpuid, rip, inst_length, cr3, vie) != 0)
|
|
return (EFAULT);
|
|
|
|
if (vmm_decode_instruction(vm, vcpuid, gla, vie) != 0)
|
|
return (EFAULT);
|
|
|
|
/* return to userland unless this is a local apic access */
|
|
if (gpa < DEFAULT_APIC_BASE || gpa >= DEFAULT_APIC_BASE + PAGE_SIZE) {
|
|
*retu = TRUE;
|
|
return (0);
|
|
}
|
|
|
|
error = vmm_emulate_instruction(vm, vcpuid, gpa, vie,
|
|
lapic_mmio_read, lapic_mmio_write, 0);
|
|
|
|
/* return to userland to spin up the AP */
|
|
if (error == 0 && vme->exitcode == VM_EXITCODE_SPINUP_AP)
|
|
*retu = TRUE;
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
vm_run(struct vm *vm, struct vm_run *vmrun)
|
|
{
|
|
int error, vcpuid;
|
|
struct vcpu *vcpu;
|
|
struct pcb *pcb;
|
|
uint64_t tscval, rip;
|
|
struct vm_exit *vme;
|
|
boolean_t retu;
|
|
pmap_t pmap;
|
|
|
|
vcpuid = vmrun->cpuid;
|
|
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
pmap = vmspace_pmap(vm->vmspace);
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
vme = &vcpu->exitinfo;
|
|
rip = vmrun->rip;
|
|
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_msrs(vm, vcpuid);
|
|
restore_guest_fpustate(vcpu);
|
|
|
|
vcpu_require_state(vm, vcpuid, VCPU_RUNNING);
|
|
vcpu->hostcpu = curcpu;
|
|
error = VMRUN(vm->cookie, vcpuid, rip, pmap);
|
|
vcpu->hostcpu = NOCPU;
|
|
vcpu_require_state(vm, vcpuid, VCPU_FROZEN);
|
|
|
|
save_guest_fpustate(vcpu);
|
|
restore_host_msrs(vm, vcpuid);
|
|
|
|
vmm_stat_incr(vm, vcpuid, VCPU_TOTAL_RUNTIME, rdtsc() - tscval);
|
|
|
|
critical_exit();
|
|
|
|
if (error == 0) {
|
|
retu = FALSE;
|
|
switch (vme->exitcode) {
|
|
case VM_EXITCODE_HLT:
|
|
error = vm_handle_hlt(vm, vcpuid, &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;
|
|
default:
|
|
retu = TRUE; /* handled in userland */
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (error == 0 && retu == FALSE) {
|
|
rip = vme->rip + vme->inst_length;
|
|
goto restart;
|
|
}
|
|
|
|
/* copy the exit information */
|
|
bcopy(vme, &vmrun->vm_exit, sizeof(struct vm_exit));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
vm_inject_event(struct vm *vm, int vcpuid, int type,
|
|
int vector, uint32_t code, int code_valid)
|
|
{
|
|
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
|
|
return (EINVAL);
|
|
|
|
if ((type > VM_EVENT_NONE && type < VM_EVENT_MAX) == 0)
|
|
return (EINVAL);
|
|
|
|
if (vector < 0 || vector > 255)
|
|
return (EINVAL);
|
|
|
|
return (VMINJECT(vm->cookie, vcpuid, type, vector, code, code_valid));
|
|
}
|
|
|
|
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;
|
|
vm_interrupt_hostcpu(vm, vcpuid);
|
|
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);
|
|
}
|
|
|
|
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));
|
|
}
|
|
|
|
uint64_t *
|
|
vm_guest_msrs(struct vm *vm, int cpu)
|
|
{
|
|
return (vm->vcpu[cpu].guest_msrs);
|
|
}
|
|
|
|
struct vlapic *
|
|
vm_lapic(struct vm *vm, int cpu)
|
|
{
|
|
return (vm->vcpu[cpu].vlapic);
|
|
}
|
|
|
|
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 = 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)
|
|
{
|
|
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(vcpu, newstate);
|
|
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);
|
|
}
|
|
|
|
void
|
|
vm_activate_cpu(struct vm *vm, int vcpuid)
|
|
{
|
|
|
|
if (vcpuid >= 0 && vcpuid < VM_MAXCPU)
|
|
CPU_SET(vcpuid, &vm->active_cpus);
|
|
}
|
|
|
|
cpuset_t
|
|
vm_active_cpus(struct vm *vm)
|
|
{
|
|
|
|
return (vm->active_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);
|
|
}
|
|
|
|
void
|
|
vm_interrupt_hostcpu(struct vm *vm, int vcpuid)
|
|
{
|
|
int hostcpu;
|
|
struct vcpu *vcpu;
|
|
|
|
vcpu = &vm->vcpu[vcpuid];
|
|
|
|
vcpu_lock(vcpu);
|
|
hostcpu = vcpu->hostcpu;
|
|
if (hostcpu == NOCPU) {
|
|
if (vcpu->state == VCPU_SLEEPING)
|
|
wakeup_one(vcpu);
|
|
} else {
|
|
if (vcpu->state != VCPU_RUNNING)
|
|
panic("invalid vcpu state %d", vcpu->state);
|
|
if (hostcpu != curcpu)
|
|
ipi_cpu(hostcpu, vmm_ipinum);
|
|
}
|
|
vcpu_unlock(vcpu);
|
|
}
|
|
|
|
struct vmspace *
|
|
vm_get_vmspace(struct vm *vm)
|
|
{
|
|
|
|
return (vm->vmspace);
|
|
}
|