## Indicates whether 64-bit PCI MMIO BARs should degrade to 32-bit in the presence of an option ROM\r
# On X64 platforms, Option ROMs may contain code that executes in the context of a legacy BIOS (CSM),\r
# which requires that all PCI MMIO BARs are located below 4 GB\r
## Indicates whether 64-bit PCI MMIO BARs should degrade to 32-bit in the presence of an option ROM\r
# On X64 platforms, Option ROMs may contain code that executes in the context of a legacy BIOS (CSM),\r
# which requires that all PCI MMIO BARs are located below 4 GB\r