This website aims to be the definitive resource for PSP emulation on PS3.
Our focus is "PSP HD & Minis", the software emulator available for all PS3 models.
Compatibility info is currently obtained from the PS3 Developer Wiki compatibility list.
Yes. Sony developed a PSP emulator called "pspemu". However, it is significantly less developed than the PS1 and PS2 emulators. Technical information and comparisons are also available on PS3 Developer Wiki.
If a game works perfectly, you may edit the Wiki directly.
If you test an untested game and discover it has issues, add it to the Wiki and open an issue via the GitHub repository.
The PSP emulator for PS3's biggest issue is that many things are simply not implemented. It is HLE, meaning it re-implements PSP functions at a high level rather than emulating the hardware, but many are missing or incomplete. It is likely Sony simply did not prioritise this emulator.
Playing PSP games is not as simple as PS1 and PS2. The PSP emulator is not included, so trying to mount a PSP game via webman MOD will not work out of the box. Go to webMAN Setup -> Update webMAN MOD -> Addons and install the PSP Remasters launcher.