  With the ever-growing number of computing architectures, performance
portability is an important aspect of (Lattice QCD) software. The Grid library
provides a good framework for writing such code, as it thoroughly separates
hardware-specific code from algorithmic functionality and already supports many
modern architectures. We describe the implementation of a multigrid solver for
Wilson clover fermions in Grid by the RQCD group. We present the features
included in our implementation, discuss initial optimization efforts, and
compare the performance with another multigrid implementation.
