Villan is 300 bb deep. He is a maniac, but the selective one. He has a fold bottom. He finished all in preflop some hands before and he shows TQs

I have 300 bb too.

HAND
NL5 FR
I OR TO 3.5BB JJ WITH one spade from utg
Villain calls and 2 more players calls

Flop reads 892 with two spades.

I bet 70% of the pot and maniac raise x 3. Everything else fold

Hero????

We are deep and I think he will keep firing. A lot of cards are bad for me.

I would push with 100bb, but with 300 bb I don't know what to do.

Ideas?