How to bind texture with Host mapped memory

Hi all.
I allocated a host memory by used cudaHostAlloc() and the flag is cudaHostAllocMapped

float hostData = NULL;
*) &hostData, allocateSize, cudaHostAllocMapped | cudaHostAllocWriteCombined);

and then get device pointer.
void * devPtr;
cudaHostGetDevicePointer(&devPtr, hostData, 0);

finally I tried to bind with my texture
texture<float, 1, cudaReadModeElementType> textureRef;
cudaBindTexture(0, textureRef, devPtr, allocateSize);
printf(“CUDA cudaBindTexture: %s\n”, cudaGetErrorString(cudaGetLastError()));

the error return is “invalid device pointer”.
Does anyone success in binding texture to a host mapped memory, please help me.
thank you.

Not supported, and not planned to be supported (apparently it had exactly zero perf advantage in our internal tests, even in cases where zero-copy should be more useful).

Thank you tmurray.

I spended a lot of time to solve this problem.