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/** @file
Guest-Hypervisor Communication Block (GHCB) Definition.
Provides data types allowing an SEV-ES guest to interact with the hypervisor
using the GHCB protocol.
Copyright (C) 2020, Advanced Micro Devices, Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Specification Reference:
SEV-ES Guest-Hypervisor Communication Block Standardization
**/
#ifndef __GHCB_H__
#define __GHCB_H__
#include <Base.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#define UD_EXCEPTION 6
#define GP_EXCEPTION 13
#define VC_EXCEPTION 29
#define GHCB_VERSION_MIN 1
#define GHCB_VERSION_MAX 1
#define GHCB_STANDARD_USAGE 0
//
// SVM Exit Codes
//
#define SVM_EXIT_DR7_READ 0x27ULL
#define SVM_EXIT_DR7_WRITE 0x37ULL
#define SVM_EXIT_RDTSC 0x6EULL
#define SVM_EXIT_RDPMC 0x6FULL
#define SVM_EXIT_CPUID 0x72ULL
#define SVM_EXIT_INVD 0x76ULL
#define SVM_EXIT_IOIO_PROT 0x7BULL
#define SVM_EXIT_MSR 0x7CULL
#define SVM_EXIT_VMMCALL 0x81ULL
#define SVM_EXIT_RDTSCP 0x87ULL
#define SVM_EXIT_WBINVD 0x89ULL
#define SVM_EXIT_MONITOR 0x8AULL
#define SVM_EXIT_MWAIT 0x8BULL
#define SVM_EXIT_NPF 0x400ULL
//
// VMG Special Exit Codes
//
#define SVM_EXIT_MMIO_READ 0x80000001ULL
#define SVM_EXIT_MMIO_WRITE 0x80000002ULL
#define SVM_EXIT_NMI_COMPLETE 0x80000003ULL
#define SVM_EXIT_AP_RESET_HOLD 0x80000004ULL
#define SVM_EXIT_AP_JUMP_TABLE 0x80000005ULL
#define SVM_EXIT_UNSUPPORTED 0x8000FFFFULL
//
// IOIO Exit Information
//
#define IOIO_TYPE_STR BIT2
#define IOIO_TYPE_IN 1
#define IOIO_TYPE_INS (IOIO_TYPE_IN | IOIO_TYPE_STR)
#define IOIO_TYPE_OUT 0
#define IOIO_TYPE_OUTS (IOIO_TYPE_OUT | IOIO_TYPE_STR)
#define IOIO_REP BIT3
#define IOIO_ADDR_64 BIT9
#define IOIO_ADDR_32 BIT8
#define IOIO_ADDR_16 BIT7
#define IOIO_DATA_32 BIT6
#define IOIO_DATA_16 BIT5
#define IOIO_DATA_8 BIT4
#define IOIO_DATA_MASK (BIT6 | BIT5 | BIT4)
#define IOIO_DATA_OFFSET 4
#define IOIO_DATA_BYTES(x) (((x) & IOIO_DATA_MASK) >> IOIO_DATA_OFFSET)
#define IOIO_SEG_ES 0
#define IOIO_SEG_DS (BIT11 | BIT10)
typedef enum {
GhcbCpl = 25,
GhcbRflags = 46,
GhcbRip,
GhcbRsp = 59,
GhcbRax = 63,
GhcbRcx = 97,
GhcbRdx,
GhcbRbx,
GhcbRbp = 101,
GhcbRsi,
GhcbRdi,
GhcbR8,
GhcbR9,
GhcbR10,
GhcbR11,
GhcbR12,
GhcbR13,
GhcbR14,
GhcbR15,
GhcbXCr0 = 125,
} GHCB_REGISTER;
typedef PACKED struct {
UINT8 Reserved1[203];
UINT8 Cpl;
UINT8 Reserved2[148];
UINT64 Dr7;
UINT8 Reserved3[144];
UINT64 Rax;
UINT8 Reserved4[264];
UINT64 Rcx;
UINT64 Rdx;
UINT64 Rbx;
UINT8 Reserved5[112];
UINT64 SwExitCode;
UINT64 SwExitInfo1;
UINT64 SwExitInfo2;
UINT64 SwScratch;
UINT8 Reserved6[56];
UINT64 XCr0;
UINT8 ValidBitmap[16];
UINT64 X87StateGpa;
UINT8 Reserved7[1016];
} GHCB_SAVE_AREA;
typedef PACKED struct {
GHCB_SAVE_AREA SaveArea;
UINT8 SharedBuffer[2032];
UINT8 Reserved1[10];
UINT16 ProtocolVersion;
UINT32 GhcbUsage;
} GHCB;
typedef union {
struct {
UINT32 Lower32Bits;
UINT32 Upper32Bits;
} Elements;
UINT64 Uint64;
} GHCB_EXIT_INFO;
typedef union {
struct {
UINT32 Vector:8;
UINT32 Type:3;
UINT32 ErrorCodeValid:1;
UINT32 Rsvd:19;
UINT32 Valid:1;
UINT32 ErrorCode;
} Elements;
UINT64 Uint64;
} GHCB_EVENT_INJECTION;
#define GHCB_EVENT_INJECTION_TYPE_INT 0
#define GHCB_EVENT_INJECTION_TYPE_NMI 2
#define GHCB_EVENT_INJECTION_TYPE_EXCEPTION 3
#define GHCB_EVENT_INJECTION_TYPE_SOFT_INT 4
#endif
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