Currently, ARM has only publicly released drivers that support OpenCL on Mali GPUs. However, a couple of months ago they passed the OpenCL compliance, running on an ARM processor, so we can expect that this will be possible in the future:
(from Khronos page )
ARM Limited 2014-06-13 OpenCL_1_1
Linux 3.9.0 with ARM drivers on v7 CPU Compute Device Type: CL_DEVICE_TYPE_CPU
Compute Device Name: ARM Cortex-A15 NEON
Compute Device Version: OpenCL 1.1
Compute Device Driver Version: 1.1
OpenCL ARM- pocl .