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...chipset/platform specific protocols are provided to make the PCI enumerate code generic. > > There are other examples in the edk2 where PCI enumeration is not required: > 1) DUET, as the PCI enumeration has already been done. You can see in https://svn.code.sf.net/p/edk2/code/trunk/edk2/DuetPkg/DuetPkgX64.dsc that the UEFI required protocols for PCI are implemented in DuetPkg/PciRootBridgeNoEnumerationDxe/PciRootBridgeNoEnumeration.inf and DuetPkg/PciBusNoEnumerationDxe/PciBusNoEnumeration.inf > 2) The BeagleBoard does not have PCI, but it produces a fake set of PCI interfaces to reuse...

...s would need to move to PcAtChipsetPkg in the non-hack version. > > Actually, it would be even better if the generic version of these > modules could be tweaked with a PCD to not do enumeration. > OK. I will look into it. Just to make clear, you want to keep PcAtChipsetPkg (not moving DuetPkg code in), and to make it able to skip enumeration with a PCD. >> OvmfPkg: introduce E820.h > > Can you copy the E820 structs from IntelFrameworkModulePkg/Csm/ > LegacyBiosDxe/LegacyBiosInterface.h instead? > OK, no problem. Wei >> OvmfPkg: define EFI_XEN_OVMF_INFO an...