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/** @file
Confidential Computing X64 Instruction
Copyright (C) 2020, Advanced Micro Devices, Inc. All rights reserved.<BR>
Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef CC_INSTRUCTION_H_
#define CC_INSTRUCTION_H_
#include <Base.h>
#include <Uefi.h>
#include <Register/Amd/Ghcb.h>
#include <IndustryStandard/InstructionParsing.h>
#include <Protocol/DebugSupport.h>
//
// Instruction execution mode definition
//
typedef enum {
LongMode64Bit = 0,
LongModeCompat32Bit,
LongModeCompat16Bit,
} CC_INSTRUCTION_MODE;
//
// Instruction size definition (for operand and address)
//
typedef enum {
Size8Bits = 0,
Size16Bits,
Size32Bits,
Size64Bits,
} CC_INSTRUCTION_SIZE;
//
// Intruction segment definition
//
typedef enum {
SegmentEs = 0,
SegmentCs,
SegmentSs,
SegmentDs,
SegmentFs,
SegmentGs,
} CC_INSTRUCTION_SEGMENT;
//
// Instruction rep function definition
//
typedef enum {
RepNone = 0,
RepZ,
RepNZ,
} CC_INSTRUCTION_REP;
typedef struct {
UINT8 Rm;
UINT8 Reg;
UINT8 Mod;
} CC_INSTRUCTION_MODRM_EXT;
typedef struct {
UINT8 Base;
UINT8 Index;
UINT8 Scale;
} CC_INSTRUCTION_SIB_EXT;
//
// Instruction opcode definition
//
typedef struct {
CC_INSTRUCTION_MODRM_EXT ModRm;
CC_INSTRUCTION_SIB_EXT Sib;
UINTN RegData;
UINTN RmData;
} CC_INSTRUCTION_OPCODE_EXT;
//
// Instruction parsing context definition
//
typedef struct {
GHCB *Ghcb;
CC_INSTRUCTION_MODE Mode;
CC_INSTRUCTION_SIZE DataSize;
CC_INSTRUCTION_SIZE AddrSize;
BOOLEAN SegmentSpecified;
CC_INSTRUCTION_SEGMENT Segment;
CC_INSTRUCTION_REP RepMode;
UINT8 *Begin;
UINT8 *End;
UINT8 *Prefixes;
UINT8 *OpCodes;
UINT8 *Displacement;
UINT8 *Immediate;
INSTRUCTION_REX_PREFIX RexPrefix;
BOOLEAN ModRmPresent;
INSTRUCTION_MODRM ModRm;
BOOLEAN SibPresent;
INSTRUCTION_SIB Sib;
UINTN PrefixSize;
UINTN OpCodeSize;
UINTN DisplacementSize;
UINTN ImmediateSize;
CC_INSTRUCTION_OPCODE_EXT Ext;
} CC_INSTRUCTION_DATA;
EFI_STATUS
CcInitInstructionData (
IN OUT CC_INSTRUCTION_DATA *InstructionData,
IN GHCB *Ghcb,
IN EFI_SYSTEM_CONTEXT_X64 *Regs
);
/**
Return a pointer to the contents of the specified register.
Based upon the input register, return a pointer to the registers contents
in the x86 processor context.
@param[in] Regs x64 processor context
@param[in] Register Register to obtain pointer for
@return Pointer to the contents of the requested register
**/
UINT64 *
CcGetRegisterPointer (
IN EFI_SYSTEM_CONTEXT_X64 *Regs,
IN UINT8 Register
);
/**
Decode a ModRM byte.
Examine the instruction parsing context to decode a ModRM byte and the SIB
byte, if present.
@param[in] Regs x64 processor context
@param[in, out] InstructionData Instruction parsing context
**/
VOID
CcDecodeModRm (
IN EFI_SYSTEM_CONTEXT_X64 *Regs,
IN OUT CC_INSTRUCTION_DATA *InstructionData
);
/**
Determine instruction length
Return the total length of the parsed instruction.
@param[in] InstructionData Instruction parsing context
@return Length of parsed instruction
**/
UINT64
CcInstructionLength (
IN CC_INSTRUCTION_DATA *InstructionData
);
/**
Initialize the instruction parsing context.
Initialize the instruction parsing context, which includes decoding the
instruction prefixes.
@param[in, out] InstructionData Instruction parsing context
@param[in] Ghcb Pointer to the Guest-Hypervisor Communication
Block
@param[in] Regs x64 processor context
@retval EFI_SUCCESS Successfully initialize InstructionData
@retval Others Other error as indicated
**/
EFI_STATUS
CcInitInstructionData (
IN OUT CC_INSTRUCTION_DATA *InstructionData,
IN GHCB *Ghcb,
IN EFI_SYSTEM_CONTEXT_X64 *Regs
);
#endif
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