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/*
* Copyright (C) 2015 Mihai Carabas <mihai.carabas@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _VMM_INSTRUCTION_EMUL_H_
#define _VMM_INSTRUCTION_EMUL_H_
#include <sys/types.h>
struct vcpu;
struct vm;
struct vie;
struct vre;
struct vm_guest_paging;
/*
* Callback functions to read and write memory regions.
*/
typedef int (*mem_region_read_t)(struct vcpu *vcpu, uint64_t gpa,
uint64_t *rval, int rsize, void *arg);
typedef int (*mem_region_write_t)(struct vcpu *vcpu, uint64_t gpa,
uint64_t wval, int wsize, void *arg);
/*
* Callback functions to read and write registers.
*/
typedef int (*reg_read_t)(struct vcpu *vcpu, uint64_t *rval, void *arg);
typedef int (*reg_write_t)(struct vcpu *vcpu, uint64_t wval, void *arg);
/*
* Emulate the decoded 'vie' instruction when it contains a memory operation.
*
* The callbacks 'mrr' and 'mrw' emulate reads and writes to the memory region
* containing 'gpa'. 'mrarg' is an opaque argument that is passed into the
* callback functions.
*
* 'void *vm' should be 'struct vm *' when called from kernel context and
* 'struct vmctx *' when called from user context.
*
*/
int vmm_emulate_instruction(struct vcpu *vcpu, uint64_t gpa, struct vie *vie,
struct vm_guest_paging *paging, mem_region_read_t mrr,
mem_region_write_t mrw, void *mrarg);
/*
* Emulate the decoded 'vre' instruction when it contains a register access.
*
* The callbacks 'regread' and 'regwrite' emulate reads and writes to the
* register from 'vie'. 'regarg' is an opaque argument that is passed into the
* callback functions.
*
* 'void *vm' should be 'struct vm *' when called from kernel context and
* 'struct vmctx *' when called from user context.
*
*/
int vmm_emulate_register(struct vcpu *vcpu, struct vre *vre, reg_read_t regread,
reg_write_t regwrite, void *regarg);
#ifdef _KERNEL
void vm_register_reg_handler(struct vm *vm, uint64_t iss, uint64_t mask,
reg_read_t reg_read, reg_write_t reg_write, void *arg);
void vm_deregister_reg_handler(struct vm *vm, uint64_t iss, uint64_t mask);
void vm_register_inst_handler(struct vm *vm, uint64_t start, uint64_t size,
mem_region_read_t mmio_read, mem_region_write_t mmio_write);
void vm_deregister_inst_handler(struct vm *vm, uint64_t start, uint64_t size);
#endif
#endif /* _VMM_INSTRUCTION_EMUL_H_ */
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