A problem with live migration of UEFI virtual machines

[wuchenye1995]

Hi all,

   We found a problem with live migration of UEFI virtual machines due to size of OVMF.fd changes.

   Specifically, the size of OVMF.fd in edk with low version such as edk-2.0-25 is 2MB while the size of it in higher version such as edk-2.0-30 is 4MB.

   When we migrate a UEFI virtual machine from the host with low version of edk2 to the host with higher one, qemu component will report an error in function qemu_ram_resize while

checking size of ovmf_pcbios: Length mismatch: pc.bios: 0x200000 in != 0x400000: Invalid argument.

   We want to know how to solve this problem after updating the version of edk2.

   Thank you.

                                                                                                                                                                                                                                                          Chenye Wu                                                                                                                                                                                                                                                             2020.2.10