[PATCH v8 04/46] MdePkg: Add a structure definition for the GHCB

["Lendacky, Thomas" <thomas.lendacky@amd.com>]

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>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
---
 MdePkg/Include/Register/Amd/Ghcb.h | 134 +++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 MdePkg/Include/Register/Amd/Ghcb.h

diff --git a/MdePkg/Include/Register/Amd/Ghcb.h b/MdePkg/Include/Register/Amd/Ghcb.h
new file mode 100644
index 000000000000..25c7823238b5
--- /dev/null
+++ b/MdePkg/Include/Register/Amd/Ghcb.h
@@ -0,0 +1,134 @@
+/** @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 <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
+
+#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 Exits
+#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
+
+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
-- 
2.17.1