device memory allocations required to have mappings/be dereferenceable?

Looking at the device memory allocation API,

__ze_api_export ze_result_t __zecall
zeDriverAllocDeviceMem(
ze_driver_handle_t hDriver, ///< [in] handle of the driver instance
const ze_device_mem_alloc_desc_t* device_desc, ///< [in] pointer to device mem alloc descriptor
size_t size, ///< [in] size in bytes to allocate
size_t alignment, ///< [in] minimum alignment in bytes for the allocation
ze_device_handle_t hDevice, ///< [in] handle of the device
void** pptr ///< [out] pointer to device allocation
);

It looks like it always passes back a (void *). Is this expected to be a mapped pointer accessible from the CPU?

There are GPUs out there (maybe not yet from Intel) that have limited access to the VRAM from the CPU, by forcing that *pptr is a mapped address for all allocation this will limit the amount of mapped accessible objects you can have.

This why Vulkan has VkDeviceMemory objects, and Map/Unmap APIs.

Start with the zeDriverAllocDeviceMem declaration shown in the issue and read the surrounding device-memory allocation API documentation. Determine whether the returned pointer is required to be CPU-mapped and dereferenceable, then define the API or documentation change needed to support devices with limited CPU access, considering the Vulkan Map/Unmap comparison.