As pointed out it is on the support list but as you noticed no one has bothered to add documentation for I think any OS guide beside VMware (maybe Windows).
I have poked HPE a couple of times about this in the past.
We have been using it on Solaris for a while and seems to work okay (at least manual switch overs). Main things to check is on 3PAR persona 2 and try to check on Solaris that the paths have something that looks like active/passive paths that switch when you test changing arrays. Generally you can search for Solaris and ALUA to attempt to get some guidance on what to do at the Solaris end (nothing HPE related last time I looked). I think on Solaris 11 the defaults work okay but some of the 3PAR tweaks used on older Solaris changed pathing rules which got in the way. We've only been using it on newly setup boxes or ones that haven't been around since Solaris 8 or something (I'm not a Solaris admin btw
).The 3PAR side of the Docs are the same, matching WWN and preferably LUN ID on both sides, rcopy group settings etc.