Geode LX support

Has anyone looked into cpufreq support for the AMD LX800? It provides control over the CPU PLL via MSR 4C000014h, but it has this ominous statement in the datasheet:

When using this register to change the PLL frequencies, the
CHIP_RESET bit should be set.

From viewing the other AMD cpufreq drivers, it appears they do not require a chip reset. This sounds like a bad thing, since I don't have a clue how to save the cpu state, reset, and restore the cpu state. Is this a big deal?

Thanks,

Paul