91 lines
3.6 KiB
C
91 lines
3.6 KiB
C
/*-
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* Copyright (c) 2012 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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#pragma once
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#include <stdint.h>
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#include <xhyve/vmm/vmm.h>
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/*
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* Emulate the decoded 'vie' instruction.
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*
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* The callbacks 'mrr' and 'mrw' emulate reads and writes to the memory region
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* containing 'gpa'. 'mrarg' is an opaque argument that is passed into the
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* callback functions.
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*
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* 'void *vm' should be 'struct vm *' when called from kernel context and
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* 'struct vmctx *' when called from user context.
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* s
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*/
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int vmm_emulate_instruction(void *vm, int cpuid, uint64_t gpa, struct vie *vie,
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struct vm_guest_paging *paging, mem_region_read_t mrr,
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mem_region_write_t mrw, void *mrarg);
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int vie_update_register(void *vm, int vcpuid, enum vm_reg_name reg,
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uint64_t val, int size);
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/* Returns 1 if the 'gla' is not canonical and 0 otherwise. */
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int vie_canonical_check(enum vm_cpu_mode cpu_mode, uint64_t gla);
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/*
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* APIs to fetch and decode the instruction from nested page fault handler.
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*
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* 'vie' must be initialized before calling 'vmm_fetch_instruction()'
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*/
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int vmm_fetch_instruction(struct vm *vm, int cpuid,
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struct vm_guest_paging *guest_paging,
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uint64_t rip, int inst_length, struct vie *vie,
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int *is_fault);
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/*
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* Translate the guest linear address 'gla' to a guest physical address.
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*
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* retval is_fault Interpretation
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* 0 0 'gpa' contains result of the translation
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* 0 1 An exception was injected into the guest
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* EFAULT N/A An unrecoverable hypervisor error occurred
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*/
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int vm_gla2gpa(struct vm *vm, int vcpuid, struct vm_guest_paging *paging,
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uint64_t gla, int prot, uint64_t *gpa, int *is_fault);
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void vie_init(struct vie *vie, const char *inst_bytes, int inst_length);
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/*
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* Decode the instruction fetched into 'vie' so it can be emulated.
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*
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* 'gla' is the guest linear address provided by the hardware assist
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* that caused the nested page table fault. It is used to verify that
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* the software instruction decoding is in agreement with the hardware.
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*
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* Some hardware assists do not provide the 'gla' to the hypervisor.
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* To skip the 'gla' verification for this or any other reason pass
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* in VIE_INVALID_GLA instead.
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*/
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#define VIE_INVALID_GLA (1UL << 63) /* a non-canonical address */
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int vmm_decode_instruction(struct vm *vm, int cpuid, uint64_t gla,
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enum vm_cpu_mode cpu_mode, int csd, struct vie *vie);
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