All the songs that have rhythm guitar except It's Goin' Down and Shadow of the Day and even sometimes songs that don't like OSC, but that's just to give him something to do on stage so he won't end up like Joe
If you're talking about in the studio, there's really no way of telling for the most part. I know he recorded guitar on BTH, WTH>YOU, Lockjaw and Sold My Soul to Yo Mama to name a few and probably A-Six/A.06 since Mike wrote other songs like A.15 that have the same title format. Mike produced It's Goin' Down, but no one knows (I think) if it's the type of production that means he did the beats like on other songs he produced (Lupe Fiasco, Apathy, Kenna, Cypress Hill, etc) or if it means he had a mentor-like job like an Executive-producer would have.