Re: [edk2-devel] [PATCH] UefiPayloadPkg: Add build option for Above 4G Memory

["Guo Dong" <guo.dong@intel.com>]

+# Above 4G Memory
+gUefiPayloadPkgTokenSpaceGuid.PcdAbove4GMemory|TRUE|BOOLEAN|0x00000019

It is not clear for the usage from the PCD name and comments.
Better to change PcdAbove4GMemory to PcdDispatchModuleAbove4GMemory or others?

Thanks,
Guo

-----Original Message-----
From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Sean Rhodes
Sent: Sunday, February 20, 2022 2:41 PM
To: devel@edk2.groups.io
Cc: Dong, Guo <guo.dong@intel.com>; Rhodes, Sean <sean@starlabs.systems>; Ni, Ray <ray.ni@intel.com>; Ma, Maurice <maurice.ma@intel.com>; You, Benjamin <benjamin.you@intel.com>
Subject: [edk2-devel] [PATCH] UefiPayloadPkg: Add build option for Above 4G Memory

When build option ABOVE_4G_MEMORY is set to true, nothing will change and EDKII will use all available memory.

Setting it to false will create memory type information HOB in payload entry, so that EDKII will reserve enough memory below 4G for EDKII modules. This option is useful for bootloaders that are not fully 64-bit aware such as Qubes R4.0.4 bootloader, Zorin and Proxmox.

Cc: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
---
 .../Library/BrotliCustomDecompressLib/brotli  |  2 +-
 .../UefiPayloadEntry/UefiPayloadEntry.c       | 39 +++++++++++++++++++
 .../UefiPayloadEntry/UefiPayloadEntry.inf     |  7 ++++
 UefiPayloadPkg/UefiPayloadPkg.dec             |  3 ++
 UefiPayloadPkg/UefiPayloadPkg.dsc             |  3 ++
 5 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/MdeModulePkg/Library/BrotliCustomDecompressLib/brotli b/MdeModulePkg/Library/BrotliCustomDecompressLib/brotli
index f4153a09f8..666c3280cc 160000
--- a/MdeModulePkg/Library/BrotliCustomDecompressLib/brotli
+++ b/MdeModulePkg/Library/BrotliCustomDecompressLib/brotli
@@ -1 +1 @@
-Subproject commit f4153a09f87cbb9c826d8fc12c74642bb2d879ea
+Subproject commit 666c3280cc11dc433c303d79a83d4ffbdd12cc8d
diff --git a/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.c b/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.c
index 0fed1e3691..998895e201 100644
--- a/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.c
+++ b/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.c
@@ -5,10 +5,44 @@
  **/ +#include <Guid/MemoryTypeInformation.h> #include "UefiPayloadEntry.h"  STATIC UINT32  mTopOfLowerUsableDram = 0; +EFI_MEMORY_TYPE_INFORMATION  mDefaultMemoryTypeInformation[] = {+  { EfiACPIReclaimMemory,   FixedPcdGet32 (PcdMemoryTypeEfiACPIReclaimMemory)   },+  { EfiACPIMemoryNVS,       FixedPcdGet32 (PcdMemoryTypeEfiACPIMemoryNVS)       },+  { EfiReservedMemoryType,  FixedPcdGet32 (PcdMemoryTypeEfiReservedMemoryType)  },+  { EfiRuntimeServicesData, FixedPcdGet32 (PcdMemoryTypeEfiRuntimeServicesData) },+  { EfiRuntimeServicesCode, FixedPcdGet32 (PcdMemoryTypeEfiRuntimeServicesCode) },+  { EfiMaxMemoryType,       0                                                   }+};++/**+   Function to reserve memory below 4GB for EDKII Modules.++   This causes the DXE to dispatch everything under 4GB and allows Operating+   System's that require EFI_LOADED_IMAGE to be under 4GB to start.+   e.g. Xen hypervisor used in Qubes.+**/+VOID+ForceModulesBelow4G (+  VOID+  )+{+  DEBUG ((DEBUG_INFO, "Building hob to restrict memory resorces to below 4G.\n"));++  //+  // Create Memory Type Information HOB+  //+  BuildGuidDataHob (+    &gEfiMemoryTypeInformationGuid,+    mDefaultMemoryTypeInformation,+    sizeof (mDefaultMemoryTypeInformation)+    );+}+ /**    Callback function to build resource descriptor HOB @@ -438,6 +472,11 @@ _ModuleEntryPoint (
   // Build other HOBs required by DXE   BuildGenericHob (); +  // Create a HOB to make resources for EDKII modules below 4G+  if (!FixedPcdGetBool (PcdAbove4GMemory)) {+    ForceModulesBelow4G ();+  }+   // Load the DXE Core   Status = LoadDxeCore (&DxeCoreEntryPoint);   ASSERT_EFI_ERROR (Status);diff --git a/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.inf b/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.inf
index 1847d6481a..2ca47e3bb5 100644
--- a/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.inf
+++ b/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.inf
@@ -86,8 +86,15 @@
   gUefiPayloadPkgTokenSpaceGuid.PcdPayloadFdMemSize   gUefiPayloadPkgTokenSpaceGuid.PcdBootloaderParameter   gUefiPayloadPkgTokenSpaceGuid.PcdSystemMemoryUefiRegionSize+  gUefiPayloadPkgTokenSpaceGuid.PcdMemoryTypeEfiACPIMemoryNVS+  gUefiPayloadPkgTokenSpaceGuid.PcdMemoryTypeEfiACPIReclaimMemory+  gUefiPayloadPkgTokenSpaceGuid.PcdMemoryTypeEfiReservedMemoryType+  gUefiPayloadPkgTokenSpaceGuid.PcdMemoryTypeEfiRuntimeServicesData+  gUefiPayloadPkgTokenSpaceGuid.PcdMemoryTypeEfiRuntimeServicesCode    gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack               ## SOMETIMES_CONSUMES   gEfiMdeModulePkgTokenSpaceGuid.PcdDxeNxMemoryProtectionPolicy ## SOMETIMES_CONSUMES   gEfiMdeModulePkgTokenSpaceGuid.PcdImageProtectionPolicy       ## SOMETIMES_CONSUMES +  gUefiPayloadPkgTokenSpaceGuid.PcdAbove4GMemory+diff --git a/UefiPayloadPkg/UefiPayloadPkg.dec b/UefiPayloadPkg/UefiPayloadPkg.dec
index 551f0a4915..653a52b5a7 100644
--- a/UefiPayloadPkg/UefiPayloadPkg.dec
+++ b/UefiPayloadPkg/UefiPayloadPkg.dec
@@ -83,6 +83,9 @@ gUefiPayloadPkgTokenSpaceGuid.PcdSystemMemoryUefiRegionSize|0x04000000|UINT32|0x
  gUefiPayloadPkgTokenSpaceGuid.PcdPcdDriverFile|{ 0x57, 0x72, 0xcf, 0x80, 0xab, 0x87, 0xf9, 0x47, 0xa3, 0xfe, 0xD5, 0x0B, 0x76, 0xd8, 0x95, 0x41 }|VOID*|0x00000018 +# Above 4G Memory+gUefiPayloadPkgTokenSpaceGuid.PcdAbove4GMemory|TRUE|BOOLEAN|0x00000019+ ## FFS filename to find the default variable initial data file. # @Prompt FFS Name of variable initial data file  gUefiPayloadPkgTokenSpaceGuid.PcdNvsDataFile |{ 0x1a, 0xf1, 0xb1, 0xae, 0x42, 0xcc, 0xcf, 0x4e, 0xac, 0x60, 0xdb, 0xab, 0xf6, 0xca, 0x69, 0xe6 }|VOID*|0x00000025diff --git a/UefiPayloadPkg/UefiPayloadPkg.dsc b/UefiPayloadPkg/UefiPayloadPkg.dsc
index 1ce96a51c1..dad14be343 100644
--- a/UefiPayloadPkg/UefiPayloadPkg.dsc
+++ b/UefiPayloadPkg/UefiPayloadPkg.dsc
@@ -33,6 +33,7 @@
   DEFINE UNIVERSAL_PAYLOAD            = FALSE   DEFINE SECURITY_STUB_ENABLE         = TRUE   DEFINE SMM_SUPPORT                  = FALSE+  DEFINE ABOVE_4G_MEMORY              = TRUE   #   # SBL:      UEFI payload for Slim Bootloader   # COREBOOT: UEFI payload for coreboot@@ -399,6 +400,8 @@
   gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask       | 0x1 !endif +  gUefiPayloadPkgTokenSpaceGuid.PcdAbove4GMemory|$(ABOVE_4G_MEMORY)+ [PcdsPatchableInModule.X64]   gPcAtChipsetPkgTokenSpaceGuid.PcdRtcIndexRegister|$(RTC_INDEX_REGISTER)   gPcAtChipsetPkgTokenSpaceGuid.PcdRtcTargetRegister|$(RTC_TARGET_REGISTER)-- 
2.32.0



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