OVMF bin files

English Virtualization
1

Installing a Windows 10 guest using virt-manager wizard.

After Step 5, when configuring all other options, in firmware type I see BIOS and 2 UEFI options: ovmf-x86_64-ms-4m-code.bin and ovmf-x86_64-ms-code.bin, being the only difference the “4m”.

What’s the difference between them? When should I use each one?

2

The difference is explained in “/usr/share/doc/packages/ovmf/README”.

As best I can tell, it only matters for Windows. I have been randomly choosing one or the other, and haven’t noticed any difference. But I am not running Windows in any VM.