It was marketed for PS2. https://en.wikipedia.org/wiki/Linux_for_PlayStation_2

The PS3 could run Linux initially, but Sony remotely disabled it on account of being a shower of cunts, resulting in a bunch of lawsuits (which even more cuntingly they paid out on, sooner than re-enable Linux).

That said I think you may be talking slightly at cross purposes; the ability to run Linux isn’t tied to processor architecture, and doesn’t mean anything in terms of what the PS3 was like to develop for as a professional game studio.