Help!! Knocking sound!! 2005 xc90 v8
 

So my engine starting making a severe knocking sound when I was driving today. I noticed it after I had turned off cruise control and having driven over 30 miles. When i got to my destination, i turned the car back on to have a crashing/knocking sound come from the engine. I turned it on and off again with the hood up, noticed it was coming from the block area. I had to limp back home. While i was driving home, whenever i would accelerate, the knocking increased frequency. I really need some ideas of what this could be.

Most likely the balance shaft bearing.