Arm Holdings is cancelling an architectural license agreement that allows Qualcomm to use intellectual property to design chips, Bloomberg News reported on Tuesday, amid an ongoing legal battle between the two companies.

Arm’s notice of the upcoming license cancellation comes about two years after it sued Qualcomm over the latter company’s acquisition of startup Nuvia Inc. for $1.4 billion. Nuvia was founded in 2019 by a team that included the former head of Apple Inc.’s CPU design team. Like Qualcomm, Apple uses Arm’s ISA to power its CPUs.

Any company that makes Arm chips must license technology from Arm Holdings plc, the British company that develops the instruction set. Companies can license the instruction set and create their own CPU designs or license one of Arm's ready-made Cortex CPU core designs to incorporate into their own chips.