From: Brijesh Singh <brijesh.si...@amd.com>
This dynamic PCD holds the address mask for page table entries when memory
encryption is enabled on AMD processors supporting the Secure Encrypted
Virtualization (SEV) feature.
Cc: Feng Tian <feng.t...@intel.com>
Cc: Star Zeng <star.z...@intel.com>
Cc: Laszlo Ersek <ler...@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Leo Duran <leo.du...@amd.com>
---
MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf | 5 ++++-
MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c | 18 ++++++++++--------
MdeModulePkg/MdeModulePkg.dec | 8 ++++++++
3 files changed, 22 insertions(+), 9 deletions(-)
diff --git a/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
b/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
index 2bc41be..d62bd9b 100644
--- a/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
+++ b/MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
@@ -6,6 +6,8 @@
# needed to run the DXE Foundation.
#
# Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
+#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD
License
# which accompanies this distribution. The full text of the license may be
found at
@@ -111,7 +113,8 @@ [FeaturePcd]
gEfiMdeModulePkgTokenSpaceGuid.PcdDxeIplSupportUefiDecompress ## CONSUMES
[Pcd.IA32,Pcd.X64]
- gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable ##
SOMETIMES_CONSUMES
+ gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable ##
SOMETIMES_CONSUMES
+ gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask ##
CONSUMES
[Pcd.IA32,Pcd.X64,Pcd.ARM,Pcd.AARCH64]
gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack ##
SOMETIMES_CONSUMES
diff --git a/MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c
b/MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c
index 790f6ab..2c52389 100644
--- a/MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c
+++ b/MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c
@@ -16,6 +16,8 @@
3) IA-32 Intel(R) Architecture Software Developer's Manual Volume 3:System
Programmer's Guide, Intel
Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
+
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD
License
which accompanies this distribution. The full text of the license may be
found at
@@ -71,14 +73,14 @@ Split2MPageTo4K (
//
// Fill in 2M page entry.
//
- *PageEntry2M = (UINT64) (UINTN) PageTableEntry | IA32_PG_P | IA32_PG_RW;
+ *PageEntry2M = (UINT64) (UINTN) PageTableEntry | PcdGet64
(PcdPteMemoryEncryptionAddressOrMask) | IA32_PG_P | IA32_PG_RW;
PhysicalAddress4K = PhysicalAddress;
for (IndexOfPageTableEntries = 0; IndexOfPageTableEntries < 512;
IndexOfPageTableEntries++, PageTableEntry++, PhysicalAddress4K += SIZE_4KB) {
//
// Fill in the Page Table entries
//
- PageTableEntry->Uint64 = (UINT64) PhysicalAddress4K;
+ PageTableEntry->Uint64 = (UINT64) PhysicalAddress4K | PcdGet64
(PcdPteMemoryEncryptionAddressOrMask);
PageTableEntry->Bits.ReadWrite = 1;
PageTableEntry->Bits.Present = 1;
if ((PhysicalAddress4K >= StackBase) && (PhysicalAddress4K < StackBase +
StackSize)) {
@@ -116,7 +118,7 @@ Split1GPageTo2M (
//
// Fill in 1G page entry.
//
- *PageEntry1G = (UINT64) (UINTN) PageDirectoryEntry | IA32_PG_P | IA32_PG_RW;
+ *PageEntry1G = (UINT64) (UINTN) PageDirectoryEntry | PcdGet64
(PcdPteMemoryEncryptionAddressOrMask) | IA32_PG_P | IA32_PG_RW;
PhysicalAddress2M = PhysicalAddress;
for (IndexOfPageDirectoryEntries = 0; IndexOfPageDirectoryEntries < 512;
IndexOfPageDirectoryEntries++, PageDirectoryEntry++, PhysicalAddress2M +=
SIZE_2MB) {
@@ -129,7 +131,7 @@ Split1GPageTo2M (
//
// Fill in the Page Directory entries
//
- PageDirectoryEntry->Uint64 = (UINT64) PhysicalAddress2M;
+ PageDirectoryEntry->Uint64 = (UINT64) PhysicalAddress2M | PcdGet64
(PcdPteMemoryEncryptionAddressOrMask);
PageDirectoryEntry->Bits.ReadWrite = 1;
PageDirectoryEntry->Bits.Present = 1;
PageDirectoryEntry->Bits.MustBe1 = 1;
@@ -248,7 +250,7 @@ CreateIdentityMappingPageTables (
//
// Make a PML4 Entry
//
- PageMapLevel4Entry->Uint64 = (UINT64)(UINTN)PageDirectoryPointerEntry;
+ PageMapLevel4Entry->Uint64 = (UINT64)(UINTN)PageDirectoryPointerEntry |
PcdGet64 (PcdPteMemoryEncryptionAddressOrMask);
PageMapLevel4Entry->Bits.ReadWrite = 1;
PageMapLevel4Entry->Bits.Present = 1;
@@ -262,7 +264,7 @@ CreateIdentityMappingPageTables (
//
// Fill in the Page Directory entries
//
- PageDirectory1GEntry->Uint64 = (UINT64)PageAddress;
+ PageDirectory1GEntry->Uint64 = (UINT64)PageAddress | PcdGet64
(PcdPteMemoryEncryptionAddressOrMask);
PageDirectory1GEntry->Bits.ReadWrite = 1;
PageDirectory1GEntry->Bits.Present = 1;
PageDirectory1GEntry->Bits.MustBe1 = 1;
@@ -280,7 +282,7 @@ CreateIdentityMappingPageTables (
//
// Fill in a Page Directory Pointer Entries
//
- PageDirectoryPointerEntry->Uint64 = (UINT64)(UINTN)PageDirectoryEntry;
+ PageDirectoryPointerEntry->Uint64 = (UINT64)(UINTN)PageDirectoryEntry
| PcdGet64 (PcdPteMemoryEncryptionAddressOrMask);
PageDirectoryPointerEntry->Bits.ReadWrite = 1;
PageDirectoryPointerEntry->Bits.Present = 1;
@@ -294,7 +296,7 @@ CreateIdentityMappingPageTables (
//
// Fill in the Page Directory entries
//
- PageDirectoryEntry->Uint64 = (UINT64)PageAddress;
+ PageDirectoryEntry->Uint64 = (UINT64)PageAddress | PcdGet64
(PcdPteMemoryEncryptionAddressOrMask);
PageDirectoryEntry->Bits.ReadWrite = 1;
PageDirectoryEntry->Bits.Present = 1;
PageDirectoryEntry->Bits.MustBe1 = 1;
diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 273cd7e..207384f 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -6,6 +6,8 @@
# Copyright (c) 2007 - 2017, Intel Corporation. All rights reserved.<BR>
# Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
# (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
+# Copyright (c) 2017, AMD Incorporated. 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
@@ -1738,5 +1740,11 @@ [PcdsDynamic, PcdsDynamicEx]
# @Prompt If there is any test key used by the platform.
gEfiMdeModulePkgTokenSpaceGuid.PcdTestKeyUsed|FALSE|BOOLEAN|0x00030003
+ ## This dynamic PCD holds the address mask for page table entries when
memory encryption is
+ # enabled on AMD processors supporting the Secure Encrypted Virtualization
(SEV) feature.
+ # This mask should be applied when creating 1:1 virtual to physical mapping
tables.
+ #
+
gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask|0x0|UINT64|0x00030004
+
[UserExtensions.TianoCore."ExtraFiles"]
MdeModulePkgExtra.uni
--
1.9.1
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