Basically, where section 44 applies, it's a simple majority vote. It simply requires the passage of an act by the House of Commons and the Senate, which will eventually receive the assent of the Governor General.
I'm using the Senate reform reference here. It's a decision that was handed down by the Supreme Court in 2014. It would not be possible for the Parliament of Canada to touch the very essence of the House of Commons or its essential nature. This means that, while the Parliament of Canada has a power of amendment under section 44 of the Constitution Act, 1982, there are limits that have not yet been defined by the Supreme Court of Canada, but there are limits to this unilateral power of constitutional amendment.