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From: "Ashraf Ali S" <ashraf.ali.s@intel.com>
To: devel@edk2.groups.io
Cc: Ashraf Ali S <ashraf.ali.s@intel.com>,
	Ray Ni <ray.ni@intel.com>,
	Rahul Kumar <rahul1.kumar@intel.com>,
	Debkumar De <debkumar.de@intel.com>,
	Harry Han <harry.han@intel.com>,
	Catharine West <catharine.west@intel.com>,
	Sangeetha V <sangeetha.v@intel.com>
Subject: [PATCH] UefiCpuPkg VTF0 X64: Build page tables using 1-GByte Page Granularity
Date: Fri,  2 Jul 2021 17:55:04 +0530
Message-Id: <0a9c6a87df650690fb97cf731cec8e11d4bcb9b1.1625228643.git.ashraf.ali.s@intel.com>
X-Mailer: git-send-email 2.32.0.windows.1
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Content-Transfer-Encoding: 8bit

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3473

X64 Reset Vector Code can access the memory range till 4GB using the
Linear-Address Translation to a 2-MByte Page, when user wants to use
more than 4G using 2M Page it will leads to use more number of Page
table entries. using the 1-GByte Page table user can use more than
4G Memory by reducing the page table entries using 1-GByte Page,
this patch attached can access memory range till 512GByte.
Build Scrips for Reset Vector currently based on Python 2
which is already EOL, needs to modify the build script based on
Python 3, update the Binary accordingly.

Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Debkumar De <debkumar.de@intel.com>
Cc: Harry Han <harry.han@intel.com>
Cc: Catharine West <catharine.west@intel.com>
Cc: Sangeetha V <sangeetha.v@intel.com>
Signed-off-by: Ashraf Ali S <ashraf.ali.s@intel.com>
---
 .../Vtf0/Bin/ResetVector.ia32.port80.raw      | Bin 516 -> 484 bytes
 .../ResetVector/Vtf0/Bin/ResetVector.ia32.raw | Bin 484 -> 468 bytes
 .../Vtf0/Bin/ResetVector.ia32.serial.raw      | Bin 884 -> 868 bytes
 .../Vtf0/Bin/ResetVector.x64.port80.raw       | Bin 28676 -> 12292 bytes
 .../ResetVector/Vtf0/Bin/ResetVector.x64.raw  | Bin 28676 -> 12292 bytes
 .../Vtf0/Bin/ResetVector.x64.serial.raw       | Bin 28676 -> 12292 bytes
 UefiCpuPkg/ResetVector/Vtf0/Build.py          |  11 +--
 .../ResetVector/Vtf0/Ia32/PageTables64.asm    |   2 +-
 UefiCpuPkg/ResetVector/Vtf0/ReadMe.txt        |   2 +-
 .../Vtf0/Tools/FixupForRawSection.py          |   4 +-
 UefiCpuPkg/ResetVector/Vtf0/Vtf0.nasmb        |   4 +-
 .../ResetVector/Vtf0/X64/1GPageTables.asm     |  64 ++++++++++++++++++
 .../X64/{PageTables.asm => 2MPageTables.asm}  |   0
 13 files changed, 77 insertions(+), 10 deletions(-)
 create mode 100644 UefiCpuPkg/ResetVector/Vtf0/X64/1GPageTables.asm
 rename UefiCpuPkg/ResetVector/Vtf0/X64/{PageTables.asm => 2MPageTables.asm} (100%)

diff --git a/UefiCpuPkg/ResetVector/Vtf0/Bin/ResetVector.ia32.port80.raw b/UefiCpuPkg/ResetVector/Vtf0/Bin/ResetVector.ia32.port80.raw
index 2c6ff655ded2a5855ca8f4428d559a7727eb6983..79b23c047bdc6e552d77d5c9e9aeae21ff04d91d 100644
GIT binary patch
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diff --git a/UefiCpuPkg/ResetVector/Vtf0/Bin/ResetVector.ia32.raw b/UefiCpuPkg/ResetVector/Vtf0/Bin/ResetVector.ia32.raw
index e34780a3a2c9b22bd10a1d5a405e344faaff94f3..ce7faa502b858e99908bcdb397b776258205e1d5 100644
GIT binary patch
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diff --git a/UefiCpuPkg/ResetVector/Vtf0/Bin/ResetVector.ia32.serial.raw b/UefiCpuPkg/ResetVector/Vtf0/Bin/ResetVector.ia32.serial.raw
index 6dfa68eabb48a44bc50a0b7fe678f80b5cdadfd5..6503a988abdac06f9aa88f0a65f2525e12233b0a 100644
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diff --git a/UefiCpuPkg/ResetVector/Vtf0/Bin/ResetVector.x64.port80.raw b/UefiCpuPkg/ResetVector/Vtf0/Bin/ResetVector.x64.port80.raw
index 6c0bcc47ebff84830b59047790c70d96e9488296..835f8ea423437fdd8b33470ca07b5d09e27ef5bf 100644
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diff --git a/UefiCpuPkg/ResetVector/Vtf0/Bin/ResetVector.x64.serial.raw b/UefiCpuPkg/ResetVector/Vtf0/Bin/ResetVector.x64.serial.raw
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diff --git a/UefiCpuPkg/ResetVector/Vtf0/Build.py b/UefiCpuPkg/ResetVector/Vtf0/Build.py
index 343c53b5ff..29f29ff0c2 100644
--- a/UefiCpuPkg/ResetVector/Vtf0/Build.py
+++ b/UefiCpuPkg/ResetVector/Vtf0/Build.py
@@ -1,7 +1,7 @@
 ## @file
 #  Automate the process of building the various reset vector types
 #
-#  Copyright (c) 2009, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2009 - 2021, Intel Corporation. All rights reserved.<BR>
 #
 #  SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -32,16 +32,19 @@ for arch in ('ia32', 'x64'):
             '-o', output,
             'Vtf0.nasmb',
             )
+        print(f"Command : {' '.join(commandLine)}")
         ret = RunCommand(commandLine)
-        print '\tASM\t' + output
-        if ret != 0: sys.exit(ret)
+        if ret != 0:
+            print(f"something went wrong while executing the {commandLine[-1]}")
+            sys.exit()
+        print('\tASM\t' + output)
 
         commandLine = (
             'python',
             'Tools/FixupForRawSection.py',
             output,
             )
-        print '\tFIXUP\t' + output
+        print('\tFIXUP\t' + output)
         ret = RunCommand(commandLine)
         if ret != 0: sys.exit(ret)
 
diff --git a/UefiCpuPkg/ResetVector/Vtf0/Ia32/PageTables64.asm b/UefiCpuPkg/ResetVector/Vtf0/Ia32/PageTables64.asm
index 87a4125d4b..9cc6f56c17 100644
--- a/UefiCpuPkg/ResetVector/Vtf0/Ia32/PageTables64.asm
+++ b/UefiCpuPkg/ResetVector/Vtf0/Ia32/PageTables64.asm
@@ -15,7 +15,7 @@ BITS    32
 SetCr3ForPageTables64:
 
     ;
-    ; These pages are built into the ROM image in X64/PageTables.asm
+    ; These pages are built into the ROM image in X64/1GPageTables.asm
     ;
     mov     eax, ADDR_OF(TopLevelPageDirectory)
     mov     cr3, eax
diff --git a/UefiCpuPkg/ResetVector/Vtf0/ReadMe.txt b/UefiCpuPkg/ResetVector/Vtf0/ReadMe.txt
index e6e5b54243..eb9dd24ee2 100644
--- a/UefiCpuPkg/ResetVector/Vtf0/ReadMe.txt
+++ b/UefiCpuPkg/ResetVector/Vtf0/ReadMe.txt
@@ -29,7 +29,7 @@ EBP/RBP - Pointer to the start of the Boot Firmware Volume
 === HOW TO BUILD VTF0 ===
 
 Dependencies:
-* Python 2.5~2.7
+* Python 3.0 or newer
 * Nasm 2.03 or newer
 
 To rebuild the VTF0 binaries:
diff --git a/UefiCpuPkg/ResetVector/Vtf0/Tools/FixupForRawSection.py b/UefiCpuPkg/ResetVector/Vtf0/Tools/FixupForRawSection.py
index c77438a0ce..de771eba22 100644
--- a/UefiCpuPkg/ResetVector/Vtf0/Tools/FixupForRawSection.py
+++ b/UefiCpuPkg/ResetVector/Vtf0/Tools/FixupForRawSection.py
@@ -1,7 +1,7 @@
 ## @file
 #  Apply fixup to VTF binary image for FFS Raw section
 #
-#  Copyright (c) 2008, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2008 - 2021, Intel Corporation. All rights reserved.<BR>
 #
 #  SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -15,6 +15,6 @@ c = ((len(d) + 4 + 7) & ~7) - 4
 if c > len(d):
     c -= len(d)
     f = open(sys.argv[1], 'wb')
-    f.write('\x90' * c)
+    f.write(b'\x90' * c)
     f.write(d)
     f.close()
diff --git a/UefiCpuPkg/ResetVector/Vtf0/Vtf0.nasmb b/UefiCpuPkg/ResetVector/Vtf0/Vtf0.nasmb
index 493738c79c..0625efc456 100644
--- a/UefiCpuPkg/ResetVector/Vtf0/Vtf0.nasmb
+++ b/UefiCpuPkg/ResetVector/Vtf0/Vtf0.nasmb
@@ -2,7 +2,7 @@
 ; @file
 ; This file includes all other code files to assemble the reset vector code
 ;
-; Copyright (c) 2008 - 2013, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2008 - 2021, Intel Corporation. All rights reserved.<BR>
 ; SPDX-License-Identifier: BSD-2-Clause-Patent
 ;
 ;------------------------------------------------------------------------------
@@ -36,7 +36,7 @@
 %include "PostCodes.inc"
 
 %ifdef ARCH_X64
-%include "X64/PageTables.asm"
+%include "X64/1GPageTables.asm"
 %endif
 
 %ifdef DEBUG_PORT80
diff --git a/UefiCpuPkg/ResetVector/Vtf0/X64/1GPageTables.asm b/UefiCpuPkg/ResetVector/Vtf0/X64/1GPageTables.asm
new file mode 100644
index 0000000000..8ae6c4c98c
--- /dev/null
+++ b/UefiCpuPkg/ResetVector/Vtf0/X64/1GPageTables.asm
@@ -0,0 +1,64 @@
+;------------------------------------------------------------------------------
+; @file
+; Emits Page Tables for 1:1 mapping of the addresses 0 - 0x8000000000 (512GB)
+;
+; Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+; Linear-Address Translation to a 1-GByte Page
+;
+;------------------------------------------------------------------------------
+
+BITS    64
+
+%define ALIGN_TOP_TO_4K_FOR_PAGING
+
+%define PAGE_PRESENT            0x01
+%define PAGE_READ_WRITE         0x02
+%define PAGE_USER_SUPERVISOR    0x04
+%define PAGE_WRITE_THROUGH      0x08
+%define PAGE_CACHE_DISABLE      0x010
+%define PAGE_ACCESSED           0x020
+%define PAGE_DIRTY              0x040
+%define PAGE_PAT                0x080
+%define PAGE_GLOBAL             0x0100
+%define PAGE_1G                 0x80
+
+%define PAGE_PDP_ATTR (PAGE_ACCESSED + \
+                       PAGE_READ_WRITE + \
+                       PAGE_PRESENT)
+
+%define PAGE_PDP_1G_ATTR (PAGE_ACCESSED + \
+                       PAGE_READ_WRITE + \
+                       PAGE_PRESENT + \
+                       PAGE_1G)
+
+%define PGTBLS_OFFSET(x) ((x) - TopLevelPageDirectory)
+%define PGTBLS_ADDR(x) (ADDR_OF(TopLevelPageDirectory) + (x))
+
+%define PDP(offset) (ADDR_OF(TopLevelPageDirectory) + (offset) + \
+                     PAGE_PDP_ATTR)
+
+%define PDP_1G(x) ((x << 30) + PAGE_PDP_1G_ATTR)
+
+ALIGN 16
+
+TopLevelPageDirectory:
+
+    ;
+    ; Top level Page Directory Pointers (1 * 512GB entry)
+    ;
+    DQ      PDP(0x1000)
+
+
+    TIMES 0x1000-PGTBLS_OFFSET($) DB 0
+    ;
+    ; Next level Page Directory Pointers (512 * 1GB entries => 512GB)
+    ;
+%assign i 0
+%rep      512
+    DQ    PDP_1G(i)
+    %assign i i+1
+%endrep
+
+
+EndOfPageTables:
diff --git a/UefiCpuPkg/ResetVector/Vtf0/X64/PageTables.asm b/UefiCpuPkg/ResetVector/Vtf0/X64/2MPageTables.asm
similarity index 100%
rename from UefiCpuPkg/ResetVector/Vtf0/X64/PageTables.asm
rename to UefiCpuPkg/ResetVector/Vtf0/X64/2MPageTables.asm
-- 
2.32.0.windows.1