c01622057c
https://bugzilla.tianocore.org/show_bug.cgi?id=4169 Move common X86 instruction codes from CcExitVcHandler.c to separate files (CcInstruction.h / CcInstruction.c) so that these codes can be re-used in TDX. Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Erdem Aktas <erdemaktas@google.com> Cc: James Bottomley <jejb@linux.ibm.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Min Xu <min.m.xu@intel.com> Acked-by: Gerd Hoffmann <kraxel@redhat.com>
198 lines
4.6 KiB
C
198 lines
4.6 KiB
C
/** @file
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Confidential Computing X64 Instruction
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Copyright (C) 2020, Advanced Micro Devices, Inc. All rights reserved.<BR>
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Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef CC_INSTRUCTION_H_
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#define CC_INSTRUCTION_H_
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#include <Base.h>
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#include <Uefi.h>
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#include <Register/Amd/Ghcb.h>
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#include <IndustryStandard/InstructionParsing.h>
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#include <Protocol/DebugSupport.h>
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//
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// Instruction execution mode definition
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//
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typedef enum {
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LongMode64Bit = 0,
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LongModeCompat32Bit,
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LongModeCompat16Bit,
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} CC_INSTRUCTION_MODE;
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//
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// Instruction size definition (for operand and address)
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//
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typedef enum {
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Size8Bits = 0,
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Size16Bits,
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Size32Bits,
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Size64Bits,
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} CC_INSTRUCTION_SIZE;
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//
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// Intruction segment definition
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//
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typedef enum {
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SegmentEs = 0,
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SegmentCs,
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SegmentSs,
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SegmentDs,
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SegmentFs,
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SegmentGs,
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} CC_INSTRUCTION_SEGMENT;
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//
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// Instruction rep function definition
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//
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typedef enum {
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RepNone = 0,
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RepZ,
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RepNZ,
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} CC_INSTRUCTION_REP;
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typedef struct {
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UINT8 Rm;
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UINT8 Reg;
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UINT8 Mod;
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} CC_INSTRUCTION_MODRM_EXT;
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typedef struct {
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UINT8 Base;
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UINT8 Index;
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UINT8 Scale;
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} CC_INSTRUCTION_SIB_EXT;
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//
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// Instruction opcode definition
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//
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typedef struct {
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CC_INSTRUCTION_MODRM_EXT ModRm;
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CC_INSTRUCTION_SIB_EXT Sib;
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UINTN RegData;
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UINTN RmData;
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} CC_INSTRUCTION_OPCODE_EXT;
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//
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// Instruction parsing context definition
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//
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typedef struct {
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GHCB *Ghcb;
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CC_INSTRUCTION_MODE Mode;
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CC_INSTRUCTION_SIZE DataSize;
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CC_INSTRUCTION_SIZE AddrSize;
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BOOLEAN SegmentSpecified;
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CC_INSTRUCTION_SEGMENT Segment;
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CC_INSTRUCTION_REP RepMode;
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UINT8 *Begin;
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UINT8 *End;
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UINT8 *Prefixes;
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UINT8 *OpCodes;
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UINT8 *Displacement;
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UINT8 *Immediate;
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INSTRUCTION_REX_PREFIX RexPrefix;
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BOOLEAN ModRmPresent;
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INSTRUCTION_MODRM ModRm;
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BOOLEAN SibPresent;
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INSTRUCTION_SIB Sib;
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UINTN PrefixSize;
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UINTN OpCodeSize;
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UINTN DisplacementSize;
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UINTN ImmediateSize;
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CC_INSTRUCTION_OPCODE_EXT Ext;
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} CC_INSTRUCTION_DATA;
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EFI_STATUS
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CcInitInstructionData (
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IN OUT CC_INSTRUCTION_DATA *InstructionData,
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IN GHCB *Ghcb,
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IN EFI_SYSTEM_CONTEXT_X64 *Regs
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);
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/**
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Return a pointer to the contents of the specified register.
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Based upon the input register, return a pointer to the registers contents
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in the x86 processor context.
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@param[in] Regs x64 processor context
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@param[in] Register Register to obtain pointer for
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@return Pointer to the contents of the requested register
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**/
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UINT64 *
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CcGetRegisterPointer (
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IN EFI_SYSTEM_CONTEXT_X64 *Regs,
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IN UINT8 Register
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);
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/**
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Decode a ModRM byte.
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Examine the instruction parsing context to decode a ModRM byte and the SIB
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byte, if present.
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@param[in] Regs x64 processor context
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@param[in, out] InstructionData Instruction parsing context
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**/
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VOID
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CcDecodeModRm (
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IN EFI_SYSTEM_CONTEXT_X64 *Regs,
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IN OUT CC_INSTRUCTION_DATA *InstructionData
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);
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/**
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Determine instruction length
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Return the total length of the parsed instruction.
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@param[in] InstructionData Instruction parsing context
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@return Length of parsed instruction
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**/
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UINT64
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CcInstructionLength (
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IN CC_INSTRUCTION_DATA *InstructionData
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);
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/**
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Initialize the instruction parsing context.
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Initialize the instruction parsing context, which includes decoding the
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instruction prefixes.
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@param[in, out] InstructionData Instruction parsing context
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@param[in] Ghcb Pointer to the Guest-Hypervisor Communication
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Block
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@param[in] Regs x64 processor context
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@retval EFI_SUCCESS Successfully initialize InstructionData
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@retval Others Other error as indicated
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**/
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EFI_STATUS
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CcInitInstructionData (
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IN OUT CC_INSTRUCTION_DATA *InstructionData,
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IN GHCB *Ghcb,
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IN EFI_SYSTEM_CONTEXT_X64 *Regs
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);
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#endif
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