English learners often use an incorrect pronoun after the word “all”. Long story short, what you most likely want to say is “all that …”, as in
The confusion stems from the fact that “all” is followed by “what” in many other languages, e.g. alles was in German. If you feel the need to say “all what” in English, the best option is usually to leave out the pronoun altogether:
“All which” would not be wrong, but it sounds rather formal and outdated (it was somewhat widespread before the 19th century).