8e2cbc5660
Rewrite the code that maintains pm_active and invalidates EPTP-tagged TLB entries in C. Previously this work was done in vmx_enter_guest(), in assembly, but there is no good reason for that and it makes the TLB invalidation algorithm for nested page tables harder to review. No functional change intended. Now, an error from the invept instruction results in a kernel panic rather than a vmexit. Such errors should occur only as a result of VMM bugs. Reviewed by: grehan, kib MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D26830
90 lines
3.6 KiB
C
90 lines
3.6 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/proc.h>
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#include <sys/assym.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_param.h>
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#include <machine/vmm.h>
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#include "vmx_cpufunc.h"
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#include "vmx.h"
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ASSYM(VMXCTX_GUEST_RDI, offsetof(struct vmxctx, guest_rdi));
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ASSYM(VMXCTX_GUEST_RSI, offsetof(struct vmxctx, guest_rsi));
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ASSYM(VMXCTX_GUEST_RDX, offsetof(struct vmxctx, guest_rdx));
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ASSYM(VMXCTX_GUEST_RCX, offsetof(struct vmxctx, guest_rcx));
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ASSYM(VMXCTX_GUEST_R8, offsetof(struct vmxctx, guest_r8));
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ASSYM(VMXCTX_GUEST_R9, offsetof(struct vmxctx, guest_r9));
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ASSYM(VMXCTX_GUEST_RAX, offsetof(struct vmxctx, guest_rax));
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ASSYM(VMXCTX_GUEST_RBX, offsetof(struct vmxctx, guest_rbx));
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ASSYM(VMXCTX_GUEST_RBP, offsetof(struct vmxctx, guest_rbp));
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ASSYM(VMXCTX_GUEST_R10, offsetof(struct vmxctx, guest_r10));
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ASSYM(VMXCTX_GUEST_R11, offsetof(struct vmxctx, guest_r11));
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ASSYM(VMXCTX_GUEST_R12, offsetof(struct vmxctx, guest_r12));
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ASSYM(VMXCTX_GUEST_R13, offsetof(struct vmxctx, guest_r13));
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ASSYM(VMXCTX_GUEST_R14, offsetof(struct vmxctx, guest_r14));
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ASSYM(VMXCTX_GUEST_R15, offsetof(struct vmxctx, guest_r15));
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ASSYM(VMXCTX_GUEST_CR2, offsetof(struct vmxctx, guest_cr2));
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ASSYM(VMXCTX_HOST_R15, offsetof(struct vmxctx, host_r15));
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ASSYM(VMXCTX_HOST_R14, offsetof(struct vmxctx, host_r14));
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ASSYM(VMXCTX_HOST_R13, offsetof(struct vmxctx, host_r13));
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ASSYM(VMXCTX_HOST_R12, offsetof(struct vmxctx, host_r12));
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ASSYM(VMXCTX_HOST_RBP, offsetof(struct vmxctx, host_rbp));
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ASSYM(VMXCTX_HOST_RSP, offsetof(struct vmxctx, host_rsp));
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ASSYM(VMXCTX_HOST_RBX, offsetof(struct vmxctx, host_rbx));
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ASSYM(VMXCTX_INST_FAIL_STATUS, offsetof(struct vmxctx, inst_fail_status));
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ASSYM(VM_FAIL_INVALID, VM_FAIL_INVALID);
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ASSYM(VM_FAIL_VALID, VM_FAIL_VALID);
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ASSYM(VMX_GUEST_VMEXIT, VMX_GUEST_VMEXIT);
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ASSYM(VMX_VMRESUME_ERROR, VMX_VMRESUME_ERROR);
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ASSYM(VMX_VMLAUNCH_ERROR, VMX_VMLAUNCH_ERROR);
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ASSYM(PC_CPUID, offsetof(struct pcpu, pc_cpuid));
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ASSYM(PM_ACTIVE, offsetof(struct pmap, pm_active));
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ASSYM(PM_EPTGEN, offsetof(struct pmap, pm_eptgen));
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ASSYM(KERNEL_SS, GSEL(GDATA_SEL, SEL_KPL));
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ASSYM(KERNEL_CS, GSEL(GCODE_SEL, SEL_KPL));
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ASSYM(PAGE_SIZE, PAGE_SIZE);
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ASSYM(KERNBASE, KERNBASE);
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