This is very easy to find out yourself.. Of the A380 operators:

AF has Y+ and Y on the upper deck.
CZ has Y on the upper deck.
MH has Y on the upper deck.
QF has Y+ and Y on the upper deck (Y+ only on the first version).
SQ has Y on the upper deck on one version.
TG has Y on the upper deck.

BA will have Y+ and Y on the upper deck.

However it may be reserved for status passengers.