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diff --git a/intern/cycles/kernel/device/cuda/config.h b/intern/cycles/kernel/device/cuda/config.h
new file mode 100644
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+++ b/intern/cycles/kernel/device/cuda/config.h
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2011-2013 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* Device data taken from CUDA occupancy calculator.
+ *
+ * Terminology
+ * - CUDA GPUs have multiple streaming multiprocessors
+ * - Each multiprocessor executes multiple thread blocks
+ * - Each thread block contains a number of threads, also known as the block size
+ * - Multiprocessors have a fixed number of registers, and the amount of registers
+ *   used by each threads limits the number of threads per block.
+ */
+
+/* 3.0 and 3.5 */
+#if __CUDA_ARCH__ == 300 || __CUDA_ARCH__ == 350
+#  define GPU_MULTIPRESSOR_MAX_REGISTERS 65536
+#  define GPU_MULTIPROCESSOR_MAX_BLOCKS 16
+#  define GPU_BLOCK_MAX_THREADS 1024
+#  define GPU_THREAD_MAX_REGISTERS 63
+
+/* tunable parameters */
+#  define GPU_KERNEL_BLOCK_NUM_THREADS 256
+#  define GPU_KERNEL_MAX_REGISTERS 63
+
+/* 3.2 */
+#elif __CUDA_ARCH__ == 320
+#  define GPU_MULTIPRESSOR_MAX_REGISTERS 32768
+#  define GPU_MULTIPROCESSOR_MAX_BLOCKS 16
+#  define GPU_BLOCK_MAX_THREADS 1024
+#  define GPU_THREAD_MAX_REGISTERS 63
+
+/* tunable parameters */
+#  define GPU_KERNEL_BLOCK_NUM_THREADS 256
+#  define GPU_KERNEL_MAX_REGISTERS 63
+
+/* 3.7 */
+#elif __CUDA_ARCH__ == 370
+#  define GPU_MULTIPRESSOR_MAX_REGISTERS 65536
+#  define GPU_MULTIPROCESSOR_MAX_BLOCKS 16
+#  define GPU_BLOCK_MAX_THREADS 1024
+#  define GPU_THREAD_MAX_REGISTERS 255
+
+/* tunable parameters */
+#  define GPU_KERNEL_BLOCK_NUM_THREADS 256
+#  define GPU_KERNEL_MAX_REGISTERS 63
+
+/* 5.x, 6.x */
+#elif __CUDA_ARCH__ <= 699
+#  define GPU_MULTIPRESSOR_MAX_REGISTERS 65536
+#  define GPU_MULTIPROCESSOR_MAX_BLOCKS 32
+#  define GPU_BLOCK_MAX_THREADS 1024
+#  define GPU_THREAD_MAX_REGISTERS 255
+
+/* tunable parameters */
+#  define GPU_KERNEL_BLOCK_NUM_THREADS 256
+/* CUDA 9.0 seems to cause slowdowns on high-end Pascal cards unless we increase the number of
+ * registers */
+#  if __CUDACC_VER_MAJOR__ >= 9 && __CUDA_ARCH__ >= 600
+#    define GPU_KERNEL_MAX_REGISTERS 64
+#  else
+#    define GPU_KERNEL_MAX_REGISTERS 48
+#  endif
+
+/* 7.x, 8.x */
+#elif __CUDA_ARCH__ <= 899
+#  define GPU_MULTIPRESSOR_MAX_REGISTERS 65536
+#  define GPU_MULTIPROCESSOR_MAX_BLOCKS 32
+#  define GPU_BLOCK_MAX_THREADS 1024
+#  define GPU_THREAD_MAX_REGISTERS 255
+
+/* tunable parameters */
+#  define GPU_KERNEL_BLOCK_NUM_THREADS 512
+#  define GPU_KERNEL_MAX_REGISTERS 96
+
+/* unknown architecture */
+#else
+#  error "Unknown or unsupported CUDA architecture, can't determine launch bounds"
+#endif
+
+/* Compute number of threads per block and minimum blocks per multiprocessor
+ * given the maximum number of registers per thread. */
+
+#define ccl_gpu_kernel(block_num_threads, thread_num_registers) \
+  extern "C" __global__ void __launch_bounds__(block_num_threads, \
+                                               GPU_MULTIPRESSOR_MAX_REGISTERS / \
+                                                   (block_num_threads * thread_num_registers))
+
+/* sanity checks */
+
+#if GPU_KERNEL_BLOCK_NUM_THREADS > GPU_BLOCK_MAX_THREADS
+#  error "Maximum number of threads per block exceeded"
+#endif
+
+#if GPU_MULTIPRESSOR_MAX_REGISTERS / (GPU_KERNEL_BLOCK_NUM_THREADS * GPU_KERNEL_MAX_REGISTERS) > \
+    GPU_MULTIPROCESSOR_MAX_BLOCKS
+#  error "Maximum number of blocks per multiprocessor exceeded"
+#endif
+
+#if GPU_KERNEL_MAX_REGISTERS > GPU_THREAD_MAX_REGISTERS
+#  error "Maximum number of registers per thread exceeded"
+#endif