The four Sony Xperia handsets (Xperia P, U, go and sola) powered by the ST-Ericsson NovaThor U8500 chipset are unlikely to see CyanogenMod support beyond CM10 (Android 4.1 Jelly Bean). Free Xperia developer FXP confirmed as much on a post at xda-developers. We can’t imagine this will be an issue as we’re sure that a stable CM10 ROM would be enough for most people.
Thanks Ben!