Duplicate DXE Driver Loading Observed During Boot on RISC-V SoC (EDK2-stable202505)

[kenadams68]

I am using EDK2-stable202505, building for a custom RISC-V SoC implemented on FPGA.
I observed that during the DXE phase, multiple drivers (e.g., RamDiskDxe, CpuDxeRiscV64, DevicePathDxe, etc.) are being loaded twice according to the UEFI debug logs.

Setup

• Platform: Custom RISC-V SoC (on FPGA)
• EDK2 branch: edk2-stable202505
• Storage: None (firmware volume contains all binaries, no SD/eMMC)
• Boot path: OpenSBI → EDK2 → UEFI Shell
• UEFI drivers are built into the FV via FDF file

Observation

In the debug log (attached), the DXE driver initialization sequence repeats.
Example snippet:
Loading driver at 0x0009E7D1000 EntryPoint=0x0009E7D1340 CpuDxeRiscV64.efi
Loading driver at 0x0009E7EC000 EntryPoint=0x0009E7EC28A DevicePathDxe.efi
Loading driver at 0x0009E801000 EntryPoint=0x0009E80128A PcdDxe.efi
Loading driver at 0x0009FEC8000 EntryPoint=0x0009FEC904A ReportStatusCodeRouterRuntimeDxe.efi
Loading driver at 0x0009FEBF000 EntryPoint=0x0009FEC004A StatusCodeHandlerRuntimeDxe.efi
...
(repeats)
...
Loading driver at 0x0009E736000 EntryPoint=0x0009E736340 CpuDxeRiscV64.efi
Loading driver at 0x0009E7A7000 EntryPoint=0x0009E7A728A DevicePathDxe.efi
Loading driver at 0x0009E7BD000 EntryPoint=0x0009E7BD28A PcdDxe.efi
Loading driver at 0x0009FEA0000 EntryPoint=0x0009FEA104A ReportStatusCodeRouterRuntimeDxe.efi
Loading driver at 0x0009FE97000 EntryPoint=0x0009FE9804A StatusCodeHandlerRuntimeDxe.efi

Questions

1. Is it expected for the DXE dispatcher to enumerate and load the same driver twice in a single FV image?
2. Is there a recommended way to debug the DXE dispatcher to confirm why the same driver is reloaded?

Attachments

• Boot log
  10-10-uefi-debug.txt

• fdf
  RISCVSOC.fdf.txt
  RISCVSOC.fdf.inc.txt

• dsc
  RISCVSOC.dsc.txt
  RISCVSOC.dsc.inc.txt

• VarStore.fdf.inc.txt