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-rw-r--r--OvmfPkg/DecomprScratchEnd.fdf.inc72
-rw-r--r--OvmfPkg/OvmfPkg.dec1
-rw-r--r--OvmfPkg/OvmfPkg.fdf.inc2
-rw-r--r--OvmfPkg/OvmfPkgIa32.fdf4
-rw-r--r--OvmfPkg/OvmfPkgIa32X64.fdf4
-rw-r--r--OvmfPkg/OvmfPkgX64.fdf4
-rw-r--r--OvmfPkg/Sec/SecMain.c8
-rw-r--r--OvmfPkg/Sec/SecMain.inf1
8 files changed, 93 insertions, 3 deletions
diff --git a/OvmfPkg/DecomprScratchEnd.fdf.inc b/OvmfPkg/DecomprScratchEnd.fdf.inc
new file mode 100644
index 0000000000..eb5cd49470
--- /dev/null
+++ b/OvmfPkg/DecomprScratchEnd.fdf.inc
@@ -0,0 +1,72 @@
+## @file
+# This FDF include file computes the end of the scratch buffer used in
+# DecompressMemFvs() [OvmfPkg/Sec/SecMain.c]. It is based on the decompressed
+# (ie. original) size of the LZMA-compressed section of the one FFS file in
+# the FVMAIN_COMPACT firmware volume.
+#
+# Copyright (C) 2015, Red Hat, Inc.
+#
+# 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
+# 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.
+##
+
+# The GUID EE4E5898-3914-4259-9D6E-DC7BD79403CF means "LzmaCustomDecompress".
+# The decompressed output will have the following structure (see the file
+# "9E21FD93-9C72-4c15-8C4B-E77F1DB2D792SEC1.guided.dummy" in the
+# Build/Ovmf*/*/FV/Ffs/9E21FD93-9C72-4c15-8C4B-E77F1DB2D792/ directory):
+#
+# Size Contents
+# ------------------- --------------------------------------------------------
+# 4 EFI_COMMON_SECTION_HEADER, stating size 124 (0x7C) and
+# type 0x19 (EFI_SECTION_RAW). The purpose of this section
+# is to pad the start of PEIFV to 128 bytes.
+# 120 Zero bytes (padding).
+#
+# 4 EFI_COMMON_SECTION_HEADER, stating size
+# (PcdOvmfPeiMemFvSize + 4), and type 0x17
+# (EFI_SECTION_FIRMWARE_VOLUME_IMAGE).
+# PcdOvmfPeiMemFvSize PEIFV. Note that the above sizes pad the offset of this
+# object to 128 bytes. See also the "guided.dummy.txt"
+# file in the same directory.
+#
+# 4 EFI_COMMON_SECTION_HEADER, stating size 12 (0xC) and
+# type 0x19 (EFI_SECTION_RAW). The purpose of this section
+# is to pad the start of DXEFV to 16 bytes.
+# 8 Zero bytes (padding).
+#
+# 4 EFI_COMMON_SECTION_HEADER, stating size
+# (PcdOvmfDxeMemFvSize + 4), and type 0x17
+# (EFI_SECTION_FIRMWARE_VOLUME_IMAGE).
+# PcdOvmfDxeMemFvSize DXEFV. Note that the above sizes pad the offset of this
+# object to 16 bytes. See also the "guided.dummy.txt" file
+# in the same directory.
+#
+# The total size after decompression is (128 + PcdOvmfPeiMemFvSize + 16 +
+# PcdOvmfDxeMemFvSize).
+
+DEFINE OUTPUT_SIZE = (128 + gUefiOvmfPkgTokenSpaceGuid.PcdOvmfPeiMemFvSize + 16 + gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeMemFvSize)
+
+# LzmaCustomDecompressLib uses a constant scratch buffer size of 64KB; see
+# SCRATCH_BUFFER_REQUEST_SIZE in
+# "MdeModulePkg/Library/LzmaCustomDecompressLib/LzmaDecompress.c".
+
+DEFINE DECOMP_SCRATCH_SIZE = 0x00010000
+
+# Note: when we use PcdOvmfDxeMemFvBase in this context, BaseTools have not yet
+# offset it with MEMFD's base address. For that reason we have to do it manually.
+#
+# The calculation below mirrors DecompressMemFvs() [OvmfPkg/Sec/SecMain.c].
+
+DEFINE OUTPUT_BASE = ($(MEMFD_BASE_ADDRESS) + gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeMemFvBase + 0x00100000)
+DEFINE DECOMP_SCRATCH_BASE_UNALIGNED = ($(OUTPUT_BASE) + $(OUTPUT_SIZE))
+DEFINE DECOMP_SCRATCH_BASE_ALIGNMENT = 0x000FFFFF
+DEFINE DECOMP_SCRATCH_BASE_MASK = 0xFFF00000
+DEFINE DECOMP_SCRATCH_BASE = (($(DECOMP_SCRATCH_BASE_UNALIGNED) + $(DECOMP_SCRATCH_BASE_ALIGNMENT)) & $(DECOMP_SCRATCH_BASE_MASK))
+
+SET gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDecompressionScratchEnd = $(DECOMP_SCRATCH_BASE) + $(DECOMP_SCRATCH_SIZE)
diff --git a/OvmfPkg/OvmfPkg.dec b/OvmfPkg/OvmfPkg.dec
index 47b0e69629..1c9f8312b5 100644
--- a/OvmfPkg/OvmfPkg.dec
+++ b/OvmfPkg/OvmfPkg.dec
@@ -106,6 +106,7 @@
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfLockBoxStorageBase|0x0|UINT32|0x18
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfLockBoxStorageSize|0x0|UINT32|0x19
gUefiOvmfPkgTokenSpaceGuid.PcdGuidedExtractHandlerTableSize|0x0|UINT32|0x1a
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDecompressionScratchEnd|0x0|UINT32|0x1f
[PcdsDynamic, PcdsDynamicEx]
gUefiOvmfPkgTokenSpaceGuid.PcdEmuVariableEvent|0|UINT64|2
diff --git a/OvmfPkg/OvmfPkg.fdf.inc b/OvmfPkg/OvmfPkg.fdf.inc
index 486bbc61ea..441c35acfa 100644
--- a/OvmfPkg/OvmfPkg.fdf.inc
+++ b/OvmfPkg/OvmfPkg.fdf.inc
@@ -60,3 +60,5 @@ SET gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingSize = $(BLOCK_SIZ
SET gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashNvStorageFtwSpareBase = gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashNvStorageFtwWorkingBase + gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingSize
SET gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize = 0x10000
+
+DEFINE MEMFD_BASE_ADDRESS = 0x800000
diff --git a/OvmfPkg/OvmfPkgIa32.fdf b/OvmfPkg/OvmfPkgIa32.fdf
index d4ae2f98ac..30bd3bc79f 100644
--- a/OvmfPkg/OvmfPkgIa32.fdf
+++ b/OvmfPkg/OvmfPkgIa32.fdf
@@ -78,7 +78,7 @@ FV = SECFV
################################################################################
[FD.MEMFD]
-BaseAddress = 0x800000
+BaseAddress = $(MEMFD_BASE_ADDRESS)
Size = 0xA00000
ErasePolarity = 1
BlockSize = 0x10000
@@ -384,6 +384,8 @@ FILE FV_IMAGE = 9E21FD93-9C72-4c15-8C4B-E77F1DB2D792 {
}
}
+!include DecomprScratchEnd.fdf.inc
+
################################################################################
[Rule.Common.SEC]
diff --git a/OvmfPkg/OvmfPkgIa32X64.fdf b/OvmfPkg/OvmfPkgIa32X64.fdf
index 5b4d9dc464..59c3362950 100644
--- a/OvmfPkg/OvmfPkgIa32X64.fdf
+++ b/OvmfPkg/OvmfPkgIa32X64.fdf
@@ -78,7 +78,7 @@ FV = SECFV
################################################################################
[FD.MEMFD]
-BaseAddress = 0x800000
+BaseAddress = $(MEMFD_BASE_ADDRESS)
Size = 0xA00000
ErasePolarity = 1
BlockSize = 0x10000
@@ -384,6 +384,8 @@ FILE FV_IMAGE = 9E21FD93-9C72-4c15-8C4B-E77F1DB2D792 {
}
}
+!include DecomprScratchEnd.fdf.inc
+
################################################################################
[Rule.Common.SEC]
diff --git a/OvmfPkg/OvmfPkgX64.fdf b/OvmfPkg/OvmfPkgX64.fdf
index 8b4dd60605..6ba1948faa 100644
--- a/OvmfPkg/OvmfPkgX64.fdf
+++ b/OvmfPkg/OvmfPkgX64.fdf
@@ -78,7 +78,7 @@ FV = SECFV
################################################################################
[FD.MEMFD]
-BaseAddress = 0x800000
+BaseAddress = $(MEMFD_BASE_ADDRESS)
Size = 0xA00000
ErasePolarity = 1
BlockSize = 0x10000
@@ -384,6 +384,8 @@ FILE FV_IMAGE = 9E21FD93-9C72-4c15-8C4B-E77F1DB2D792 {
}
}
+!include DecomprScratchEnd.fdf.inc
+
################################################################################
[Rule.Common.SEC]
diff --git a/OvmfPkg/Sec/SecMain.c b/OvmfPkg/Sec/SecMain.c
index 0cf127af84..93e3594e29 100644
--- a/OvmfPkg/Sec/SecMain.c
+++ b/OvmfPkg/Sec/SecMain.c
@@ -362,6 +362,14 @@ DecompressMemFvs (
OutputBuffer = (VOID*) ((UINT8*)(UINTN) PcdGet32 (PcdOvmfDxeMemFvBase) + SIZE_1MB);
ScratchBuffer = ALIGN_POINTER ((UINT8*) OutputBuffer + OutputBufferSize, SIZE_1MB);
+
+ DEBUG ((EFI_D_VERBOSE, "%a: OutputBuffer@%p+0x%x ScratchBuffer@%p+0x%x "
+ "PcdOvmfDecompressionScratchEnd=0x%x\n", __FUNCTION__, OutputBuffer,
+ OutputBufferSize, ScratchBuffer, ScratchBufferSize,
+ PcdGet32 (PcdOvmfDecompressionScratchEnd)));
+ ASSERT ((UINTN)ScratchBuffer + ScratchBufferSize ==
+ PcdGet32 (PcdOvmfDecompressionScratchEnd));
+
Status = ExtractGuidedSectionDecode (
Section,
&OutputBuffer,
diff --git a/OvmfPkg/Sec/SecMain.inf b/OvmfPkg/Sec/SecMain.inf
index 415731ce54..9e8571dddd 100644
--- a/OvmfPkg/Sec/SecMain.inf
+++ b/OvmfPkg/Sec/SecMain.inf
@@ -70,3 +70,4 @@
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPeiTempRamSize
gEfiMdePkgTokenSpaceGuid.PcdGuidedExtractHandlerTableAddress
gUefiOvmfPkgTokenSpaceGuid.PcdGuidedExtractHandlerTableSize
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDecompressionScratchEnd
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-03 04:25:29 +0000