Parameter verification layer blocks clGetDeviceIDs(CL_DEVICE_TYPE_ALL)

That value is explicitly allowed for `clGetDeviceIDs` and `clCreateContextFromType`. The error message is not very helpful either.

Locate the parameter verification logic for clGetDeviceIDs and clCreateContextFromType, focusing on handling CL_DEVICE_TYPE_ALL. Confirm that this value is accepted for both entry points and improve the associated error message; the issue provides no test or file path, so identify the relevant verification tests before making changes.

Written by the indexing model from the issue text.