> (2) Build the SeaBIOS CSM (CONFIG_CSM=y), and embed it into OVMF, > like described above. Then, boot Windows 7 in *UEFI Mode*.
> Option #1 and option #2 no longer work because the CSM infrastructure > in edk2 needs to be able to write 0xc0000.
Well, option #2 works for me.
> (2) Build the SeaBIOS CSM (CONFIG_CSM=y), and embed it into OVMF,
> like described above. Then, boot Windows 7 in *UEFI Mode*.
> Option #1 and option #2 no longer work because the CSM infrastructure
> in edk2 needs to be able to write 0xc0000.
Well, option #2 works for me.