Vlv2DeviceRefCodePkg&Vlv2DevicePkg:Add sample WSMT table.

This is an sample WSMT table, which we only
update BIT0 and BIT1 of Protections flags fields.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: lushifex <shifeix.a.lu@intel.com>
Reviewed-by: David Wei <david.wei@intel.com>

Vlv2DeviceRefCodePkg/AcpiTablesPCAT/AcpiTables.inf

@@ -5,7 +5,7 @@
 #  All .asi files tagged with "ToolCode="DUMMY"" in following file list are device description and are included
 #  by top level ASL file which will be dealed with by asl.exe application.
 #
-# Copyright (c)  1999  - 2015, Intel Corporation. All rights reserved
+# Copyright (c)  1999  - 2016, Intel Corporation. All rights reserved
 #
 # This program and the accompanying materials are licensed and made available under
 # the terms and conditions of the BSD License that accompanies this distribution.
@@ -37,6 +37,7 @@
   Mcfg/Mcfg.aslc
   Hpet/Hpet.aslc
   Lpit/Lpit.aslc
+  Wsmt/Wsmt.aslc
 
 
 [Packages]

Vlv2DeviceRefCodePkg/AcpiTablesPCAT/Wsmt/Wsmt.aslc

@@ -0,0 +1,60 @@
+/*++
+  Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+
+  This program and the accompanying materials are licensed and made available under
+  the terms and conditions of the BSD License that accompanies this distribution.
+  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php.
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+
+
+Module Name:
+
+  Wsmt.c
+
+Abstract:
+
+  This file contains a structure definition for the Windows SMM Security
+  Mitigations Table (WSMT).
+
+++*/
+
+//
+// Statements that include other files
+//
+#include "AcpiTablePlatform.h"
+#include <IndustryStandard/WindowsSmmSecurityMitigationTable.h>
+
+//
+// WSMT Table definition
+//
+EFI_ACPI_WSMT_TABLE WSMT = {
+  EFI_ACPI_WINDOWS_SMM_SECURITY_MITIGATION_TABLE_SIGNATURE,
+  sizeof (EFI_ACPI_WSMT_TABLE),
+  EFI_WSMT_TABLE_REVISION,
+  //
+  // Checksum will be updated at runtime
+  //
+  0,
+  EFI_ACPI_OEM_ID,            // OEMID is a 6 bytes long field
+  EFI_ACPI_OEM_TABLE_ID,      // OEM table identification(8 bytes long)
+  EFI_ACPI_OEM_REVISION,      // OEM revision
+  EFI_ACPI_CREATOR_ID,        // ASL compiler vendor ID
+  EFI_ACPI_CREATOR_REVISION,  // ASL compiler revision number
+  0x00000000,                 // Protection flag
+};
+
+VOID*
+ReferenceAcpiTable (
+  VOID
+  )
+{
+  //
+  // Reference the table being generated to prevent the optimizer from
+  // removing the data structure from the executable
+  //
+  return (VOID*)&WSMT;
+}

Vlv2TbltDevicePkg/AcpiPlatform/AcpiPlatform.c

@@ -58,6 +58,7 @@ Abstract:
 #include <PchAccess.h>
 #include <Guid/Vlv2Variable.h>
 #include <Guid/PlatformCpuInfo.h>
+#include <IndustryStandard/WindowsSmmSecurityMitigationTable.h>
 
 
 CHAR16    EfiPlatformCpuInfoVariable[] = L"PlatformCpuInfo";
@@ -238,6 +239,7 @@ PlatformUpdateTables (
   UINT8                                                       TempVal;
   EFI_ACPI_3_0_IO_APIC_STRUCTURE                              *IOApicType;
   EFI_ACPI_3_0_MULTIPLE_APIC_DESCRIPTION_TABLE_HEADER         *APICTableHeader;
+  EFI_ACPI_WSMT_TABLE                                         *WsmtTable;
 
   CurrPtr                 = NULL;
   EndPtr                  = NULL;
@@ -599,6 +601,17 @@ PlatformUpdateTables (
       gBS->FreePool (OcurModelStringBuffer);
       gBS->FreePool (OcurRefDataBlockBuffer);
       break;
+
+
+    case EFI_ACPI_WINDOWS_SMM_SECURITY_MITIGATION_TABLE_SIGNATURE:
+      WsmtTable = (EFI_ACPI_WSMT_TABLE *) Table;
+       //
+       // Update Microsoft WSMT table Protections flags.
+       //
+      WsmtTable->ProtectionFlags = ((WsmtTable->ProtectionFlags) | (EFI_WSMT_PROTECTION_FLAGS_FIXED_COMM_BUFFERS | EFI_WSMT_PROTECTION_FLAGS_COMM_BUFFER_NESTED_PTR_PROTECTION ));
+      break;
+
+
     default:
       break;
   }