Although the PS4 host has been cracked, it can be installed with a Linux system and can play Steam games, but it is still preliminary, and hackers are also working hard to study more interesting possibilities.
Recently a team of German hackers got into trouble and couldn't get any output from the PS4 GPU to display and couldn't process any graphics, so they rummaged around online.
AMD APU used on PS4
First, the Linux Radeon Graphics Driver source code was found to be unhelpful, incomplete, and unable to get a full picture.
But the Internet is full of wonders. They found the register reference of AMD Bonarie GPU (HD 7790/R7 260) on an obscure website, which is the Bible for playing GPU.
Although the AMD GPU core used in PS4 is actually Pitcairn (R7 265/R9 370), and these registers are not complete, but at least there is a breakthrough, which is better than nothing.
Previously cracked PS4 Linux
And you must know that AMD GPUs have almost dominated game consoles, and the cores of these years have been similar in terms of the underlying architecture of GCN, so hackers believe that they will be able to crack and run more Linux and Steam on PS4 sooner or later.