OvmfPkg: Update LINUX_LOADER to allow unaligned user images

Required in some distros, e.g. SliTaz. In that example bootx64.efi is the kernel plus an extra loader which fetches its params from a text file. That image has section alignment 0x20, whereas the default (0x7) PcdImageProtectionPolicy enforces section alignment of EFI_PAGE_SIZE=0x1000 for all images. In OpenDuet and OpenCore native loader the Pcd is already set to 0x03, to not enforce this for user images (to allow legacy Apple images) - so this distro I believe would already load via Duet; but this change is required for it to load in AUDK OVMF.
acidanthera · Mar 14, 2024 · 13f99fa · 13f99fa
1 parent 11bfa6a
commit 13f99fa
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diff --git a/OvmfPkg/IntelTdx/IntelTdxX64.dsc b/OvmfPkg/IntelTdx/IntelTdxX64.dsc
@@ -485,6 +485,7 @@
     # Allow execution of EfiReservedMemoryType, EfiConventionalMemory, EfiBootServicesData and EfiLoaderData memory regions.
     gEfiMdeModulePkgTokenSpaceGuid.PcdDxeNxMemoryProtectionPolicy|0xFFFFFFFFFFFFFF40
     gEfiMdePkgTokenSpaceGuid.PcdImageLoaderAllowMisalignedOffset|TRUE
+    gEfiMdePkgTokenSpaceGuid.PcdImageProtectionPolicy|0x00000003
   !else
     # Allow execution of EfiConventionalMemory and EfiBootServicesData memory regions.
     gEfiMdeModulePkgTokenSpaceGuid.PcdDxeNxMemoryProtectionPolicy|0xFFFFFFFFFFFFFF45

diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc
@@ -592,6 +592,7 @@
     # Allow execution of EfiReservedMemoryType, EfiConventionalMemory, EfiBootServicesData and EfiLoaderData memory regions.
     gEfiMdeModulePkgTokenSpaceGuid.PcdDxeNxMemoryProtectionPolicy|0xFFFFFFFFFFFFFF40
     gEfiMdePkgTokenSpaceGuid.PcdImageLoaderAllowMisalignedOffset|TRUE
+    gEfiMdePkgTokenSpaceGuid.PcdImageProtectionPolicy|0x00000003
   !elseif $(WINDOWS_10_IA32) == TRUE
     # Allow execution of EfiReservedMemoryType, EfiConventionalMemory, EfiBootServicesData and EfiRuntimeServicesData memory regions.
     gEfiMdeModulePkgTokenSpaceGuid.PcdDxeNxMemoryProtectionPolicy|0xFFFFFFFFFFFFFF04

diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
@@ -607,6 +607,7 @@
     # Allow execution of EfiReservedMemoryType, EfiConventionalMemory, EfiBootServicesData and EfiLoaderData memory regions.
     gEfiMdeModulePkgTokenSpaceGuid.PcdDxeNxMemoryProtectionPolicy|0xFFFFFFFFFFFFFF40
     gEfiMdePkgTokenSpaceGuid.PcdImageLoaderAllowMisalignedOffset|TRUE
+    gEfiMdePkgTokenSpaceGuid.PcdImageProtectionPolicy|0x00000003
   !endif
 
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diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
@@ -623,6 +623,7 @@
     # Allow execution of EfiReservedMemoryType, EfiConventionalMemory, EfiBootServicesData and EfiLoaderData memory regions.
     gEfiMdeModulePkgTokenSpaceGuid.PcdDxeNxMemoryProtectionPolicy|0xFFFFFFFFFFFFFF40
     gEfiMdePkgTokenSpaceGuid.PcdImageLoaderAllowMisalignedOffset|TRUE
+    gEfiMdePkgTokenSpaceGuid.PcdImageProtectionPolicy|0x00000003
   !endif
 
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