[PATCH 02/12] OvmfPkg/Sec: Move SEV-ES SEC workarea definition to common header file

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

From: Tom Lendacky <thomas.lendacky@amd.com>

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3108

In order to allow for the SEV-ES workarea to be used for other purposes
and by other files, move the definition into the BaseMemEncryptSevLib
header file, MemEncryptSevLib.h.

Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
---
 OvmfPkg/Include/Library/MemEncryptSevLib.h | 16 +++++++++++++++-
 OvmfPkg/Sec/SecMain.c                      |  6 ++----
 2 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/OvmfPkg/Include/Library/MemEncryptSevLib.h b/OvmfPkg/Include/Library/MemEncryptSevLib.h
index fc70b0114354..a6d82dac7fac 100644
--- a/OvmfPkg/Include/Library/MemEncryptSevLib.h
+++ b/OvmfPkg/Include/Library/MemEncryptSevLib.h
@@ -2,7 +2,7 @@
 
   Define Secure Encrypted Virtualization (SEV) base library helper function
 
-  Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
+  Copyright (c) 2017 - 2020, AMD Incorporated. All rights reserved.<BR>
 
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
@@ -13,6 +13,20 @@
 
 #include <Base.h>
 
+//
+// Internal structure for holding SEV-ES information needed during SEC phase
+// and valid only during SEC phase and early PEI during platform
+// initialization.
+//
+// This structure is also used by assembler files:
+//   OvmfPkg/ResetVector/ResetVector.nasmb
+//   OvmfPkg/ResetVector/Ia32/PageTables64.asm
+// any changes must stay in sync with its usage.
+//
+typedef struct _SEC_SEV_ES_WORK_AREA {
+  UINT8    SevEsEnabled;
+} SEC_SEV_ES_WORK_AREA;
+
 /**
   Returns a boolean to indicate whether SEV-ES is enabled.
 
diff --git a/OvmfPkg/Sec/SecMain.c b/OvmfPkg/Sec/SecMain.c
index 63aca7020727..9db67e17b2aa 100644
--- a/OvmfPkg/Sec/SecMain.c
+++ b/OvmfPkg/Sec/SecMain.c
@@ -3,6 +3,7 @@
 
   Copyright (c) 2008 - 2015, Intel Corporation. All rights reserved.<BR>
   (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
+  Copyright (c) 2020, Advanced Micro Devices, Inc. All rights reserved.<BR>
 
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
@@ -25,6 +26,7 @@
 #include <Library/ExtractGuidedSectionLib.h>
 #include <Library/LocalApicLib.h>
 #include <Library/CpuExceptionHandlerLib.h>
+#include <Library/MemEncryptSevLib.h>
 #include <Register/Amd/Ghcb.h>
 #include <Register/Amd/Msr.h>
 
@@ -37,10 +39,6 @@ typedef struct _SEC_IDT_TABLE {
   IA32_IDT_GATE_DESCRIPTOR  IdtTable[SEC_IDT_ENTRY_COUNT];
 } SEC_IDT_TABLE;
 
-typedef struct _SEC_SEV_ES_WORK_AREA {
-  UINT8  SevEsEnabled;
-} SEC_SEV_ES_WORK_AREA;
-
 VOID
 EFIAPI
 SecStartupPhase2 (
-- 
2.28.0