Now that CodeXL is open-source and openly developed, I'd expect it to support more than just AMD GPUs. Is this true?
Which GPUs does CodeXL support?
This information is buried deep in the GPUOpen site, in the Release Notes for the latest version - 2.2, the System Requirements section.
The document is lengthy and copyrighted so I won't reproduce the information from it here, except the piece that I was most interested in:
For GPU API-Level Debugging, a working OpenCL/OpenGL configuration is required (AMD or other)
So non-AMD GPUs are supported.