Multiprocessing Within a Storage Array System Executing Controller Firmware Designed for a Uniprocessor Environment

Systems, devices, and methods are provided for sharing host resources in a multiprocessor storage array, the multiprocessor storage array running controller firmware designed for a uniprocessor environment. In some aspects, one or more virtual machines can be initialized by a virtual machine manager or a hypervisor in the storage array system. Each of the one or more virtual machines implement an instance of the controller firmware designed for a uniprocessor environment. The virtual machine manager or hypervisor can assign processing devices within the storage array system to each of the one or more virtual machines. The virtual machine manager or hypervisor can also assign virtual functions to each of the virtual machines. The virtual machines can concurrently access one or more I/O devices, such as physical storage devices, by writing to and reading from the respective virtual functions.