While a host has been able to address NVMe device memory using Controller Memory Buffer (CMB) and Persistent Memory Region (PMR), that memory has never been addressable by NVMe commands. NVMe introduced the Subsystem Local Memory IO Command Set (SLM), which allowed NVMe device memory to be addressable by NVMe commands; however, this memory could not be addressed by the host using host memory addresses. A new technical proposal is being developed by NVM Express that would allow SLM to be assigned to a host memory address range. We will describe the architecture of this new NVMe feature and discuss the benefits and use cases that host addressable SLM enables.