SVM Integration

Buffers and images can both be created from SVM allocations by using CL_USE_HOST_PTR and they effectively provide a view into the SVM memory. However, the level of consistency in the memory is unknown if buffers and images are used instead of the SVM allocation. I think this kind of fits in with the Vulkan concept of Memory and Buffers/Images. Why not distinguish between the 2 in OpenCL as well with SVM and a new method for device allocation acting as allocators for Memory and the ability to create Buffers/Images from that memory.

Start by reviewing the OpenCL memory model and API areas covering SVM allocations, CL_USE_HOST_PTR, buffers, and images, then compare the Vulkan memory and buffer/image concepts referenced in the issue. Done would require a settled proposal that defines the requested device allocation and memory relationship, including its consistency behavior.

Written by the indexing model from the issue text.