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MdePkg: Add a structure definition for the GHCB
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198 The GHCB is used by an SEV-ES guest for communicating between the guest and the hypervisor. Create the GHCB definition as defined by the GHCB protocol definition. Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <liming.gao@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
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Tom Lendacky
mergify[bot]
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/** @file
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Guest-Hypervisor Communication Block (GHCB) Definition.
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Provides data types allowing an SEV-ES guest to interact with the hypervisor
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using the GHCB protocol.
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Copyright (C) 2020, Advanced Micro Devices, Inc. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Specification Reference:
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SEV-ES Guest-Hypervisor Communication Block Standardization
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**/
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#ifndef __GHCB_H__
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#define __GHCB_H__
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#include <Base.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#define UD_EXCEPTION 6
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#define GP_EXCEPTION 13
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#define VC_EXCEPTION 29
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#define GHCB_VERSION_MIN 1
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#define GHCB_VERSION_MAX 1
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#define GHCB_STANDARD_USAGE 0
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//
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// SVM Exit Codes
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//
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#define SVM_EXIT_DR7_READ 0x27ULL
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#define SVM_EXIT_DR7_WRITE 0x37ULL
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#define SVM_EXIT_RDTSC 0x6EULL
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#define SVM_EXIT_RDPMC 0x6FULL
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#define SVM_EXIT_CPUID 0x72ULL
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#define SVM_EXIT_INVD 0x76ULL
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#define SVM_EXIT_IOIO_PROT 0x7BULL
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#define SVM_EXIT_MSR 0x7CULL
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#define SVM_EXIT_VMMCALL 0x81ULL
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#define SVM_EXIT_RDTSCP 0x87ULL
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#define SVM_EXIT_WBINVD 0x89ULL
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#define SVM_EXIT_MONITOR 0x8AULL
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#define SVM_EXIT_MWAIT 0x8BULL
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#define SVM_EXIT_NPF 0x400ULL
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//
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// VMG Special Exit Codes
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//
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#define SVM_EXIT_MMIO_READ 0x80000001ULL
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#define SVM_EXIT_MMIO_WRITE 0x80000002ULL
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#define SVM_EXIT_NMI_COMPLETE 0x80000003ULL
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#define SVM_EXIT_AP_RESET_HOLD 0x80000004ULL
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#define SVM_EXIT_AP_JUMP_TABLE 0x80000005ULL
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#define SVM_EXIT_UNSUPPORTED 0x8000FFFFULL
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//
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// IOIO Exit Information
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//
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#define IOIO_TYPE_STR BIT2
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#define IOIO_TYPE_IN 1
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#define IOIO_TYPE_INS (IOIO_TYPE_IN | IOIO_TYPE_STR)
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#define IOIO_TYPE_OUT 0
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#define IOIO_TYPE_OUTS (IOIO_TYPE_OUT | IOIO_TYPE_STR)
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#define IOIO_REP BIT3
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#define IOIO_ADDR_64 BIT9
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#define IOIO_ADDR_32 BIT8
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#define IOIO_ADDR_16 BIT7
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#define IOIO_DATA_32 BIT6
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#define IOIO_DATA_16 BIT5
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#define IOIO_DATA_8 BIT4
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#define IOIO_DATA_MASK (BIT6 | BIT5 | BIT4)
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#define IOIO_DATA_OFFSET 4
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#define IOIO_DATA_BYTES(x) (((x) & IOIO_DATA_MASK) >> IOIO_DATA_OFFSET)
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#define IOIO_SEG_ES 0
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#define IOIO_SEG_DS (BIT11 | BIT10)
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typedef enum {
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GhcbCpl = 25,
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GhcbRflags = 46,
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GhcbRip,
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GhcbRsp = 59,
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GhcbRax = 63,
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GhcbRcx = 97,
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GhcbRdx,
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GhcbRbx,
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GhcbRbp = 101,
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GhcbRsi,
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GhcbRdi,
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GhcbR8,
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GhcbR9,
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GhcbR10,
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GhcbR11,
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GhcbR12,
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GhcbR13,
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GhcbR14,
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GhcbR15,
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GhcbXCr0 = 125,
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} GHCB_REGISTER;
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typedef PACKED struct {
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UINT8 Reserved1[203];
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UINT8 Cpl;
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UINT8 Reserved2[148];
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UINT64 Dr7;
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UINT8 Reserved3[144];
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UINT64 Rax;
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UINT8 Reserved4[264];
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UINT64 Rcx;
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UINT64 Rdx;
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UINT64 Rbx;
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UINT8 Reserved5[112];
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UINT64 SwExitCode;
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UINT64 SwExitInfo1;
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UINT64 SwExitInfo2;
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UINT64 SwScratch;
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UINT8 Reserved6[56];
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UINT64 XCr0;
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UINT8 ValidBitmap[16];
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UINT64 X87StateGpa;
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UINT8 Reserved7[1016];
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} GHCB_SAVE_AREA;
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typedef PACKED struct {
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GHCB_SAVE_AREA SaveArea;
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UINT8 SharedBuffer[2032];
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UINT8 Reserved1[10];
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UINT16 ProtocolVersion;
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UINT32 GhcbUsage;
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} GHCB;
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typedef union {
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struct {
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UINT32 Lower32Bits;
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UINT32 Upper32Bits;
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} Elements;
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UINT64 Uint64;
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} GHCB_EXIT_INFO;
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typedef union {
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struct {
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UINT32 Vector:8;
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UINT32 Type:3;
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UINT32 ErrorCodeValid:1;
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UINT32 Rsvd:19;
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UINT32 Valid:1;
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UINT32 ErrorCode;
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} Elements;
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UINT64 Uint64;
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} GHCB_EVENT_INJECTION;
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#define GHCB_EVENT_INJECTION_TYPE_INT 0
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#define GHCB_EVENT_INJECTION_TYPE_NMI 2
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#define GHCB_EVENT_INJECTION_TYPE_EXCEPTION 3
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#define GHCB_EVENT_INJECTION_TYPE_SOFT_INT 4
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#endif
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