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>
Reviewed-by: Guo Dong <guo.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/UefiPayloadPkg/UefiPayloadPkg.dsc b/UefiPayloadPkg/UefiPayloadPkg.dsc
index 1ce96a51c1..4fe81a61d6 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.PcdDispatchModuleAbove4GMemory|$(ABOVE_4G_MEMORY)

+

 [PcdsPatchableInModule.X64]

   gPcAtChipsetPkgTokenSpaceGuid.PcdRtcIndexRegister|$(RTC_INDEX_REGISTER)

   gPcAtChipsetPkgTokenSpaceGuid.PcdRtcTargetRegister|$(RTC_TARGET_REGISTER)