Qemu with persistent CMOS RAM (save / restore)

[Simon Glass]

Hi,

Is it possible to save and restore CMOS RAM with qemu, or some other
emulator? I'd like it to be kept in a file on my system, so I can run
coreboot multiple times and the CMOS RAM is preserved across runs.

For example, if I make a change to a CMOS location, then I'd like that
change to still be visible on the next run.

Regards,
Simon