Peterson, who operated on the 31-year-old's troublesome knee in Gothenborg on Monday, admitted the player had a massive role to play if he is to resurrect his career.
"It went well and all the bad gristle has been removed and replaced with new cells,”
"If the training for coming back goes well, and Solskjaer wants it, he will be back in a year."
"It will be a lot of hard work further down the line," Solskjaer told NRK.
"But the first three to four months will be a test of patience. But I will return and play football again. He (Sir Alex Ferguson) wished me well and wanted to welcome me back."