Software filtered memory devices in computing systems

A method of implementing software filtered non-volatile memory in a computing device having a processor executing instructions to provide a host supporting a virtual machine assigned to access a non-volatile memory physically attached to the computing device, the method comprising:

• detecting a configuration request from the virtual machine to configure the non-volatile memory;
• and
• upon detecting the configuration request by the virtual machine,
• creating a guest admin submission queue (gASQ) and a guest admin completion queue (gACQ) configured to contain entries of commands from the virtual machine and execution results of the commands, respectively;
• creating a host admin submission queue (hASQ) and a host admin completion queue (hACQ) corresponding to the gASQ and the gACQ, respectively;
• and
• configuring the host to, upon detecting an entry containing a command to the non-volatile memory written to the gASQ:
• retrieve the entry from the gASQ;
• determine whether the command in the retrieved entry is allowed based on a list of allowed or disallowed commands;
• and
• in response to determining that the command in the entry is not allowed, generate an execution result of the command without sending the command to the non-volatile memory and write the generated execution result as another entry to the gACQ accessible by the virtual machine in response to the entry being written to the gASQ by the virtual machine, thereby preventing the command that is not allowed from being executed by the non-volatile memory.

A computing device, comprising:

• a processor;
• a non-volatile memory operatively coupled to the processor, wherein the computing device contains instructions executable by the processor to cause the computing device to:
• provide a host that supports a virtual machine having a memory driver;
• assign the non-volatile memory to be directly accessible by the virtual machine;
• and
• upon detecting a configuration request by the memory driver of the virtual machine to configure the non-volatile memory,
• create a guest admin submission queue (gASQ) and a guest admin completion queue (gACQ) configured to contain entries of commands from the memory driver and corresponding execution results of the commands, respectively;
• create a host admin submission queue (hASQ) and a host admin completion queue (hACQ) corresponding to the gASQ and the gACQ, respectively, the hASQ and the hACQ being directly linked to the non-volatile memory;
• and
• configuring the host to, upon detecting an entry containing a command to the non-volatile memory being written to the gASQ by the virtual machine,
• retrieve the entry from the gASQ;
• determine whether the command in the entry is allowed based on a list of allowed or disallowed commands;
• and
• in response to determining that the command in the entry is not allowed, generate an execution result of the command without sending the command to the non-volatile memory and write the generated execution result as an entry to the gACQ accessible by the virtual machine in response to the entry being written to the gASQ by the memory driver.