Bhagbat Gita and Freewill, Determinism

I was wondering if Krishna is all-knower, then he knew about the future that Arjuna will lift his bow after hearing to him and he will fight. So, in Gita, Krishna says that you can choose to fight and be my weapon and achieve greatness by following your dharma or you can labeled as a coward for whole of your life.If Krishna is God, that means he is all-knower, he knows about the future, that means he knows that Arjuna will choose the path of warrior. So, does it mean that Arjuna had the free will or it just means that Arjuna will choose to fight no matter what? So, what does he stand in the perspective of determinism and free will?