Abstract: A disclosed example includes accessing, by a backend block service driver in an input/output virtual machine executing on one or more processors, a first command submitted to a buffer by a paravirtualized input/output frontend block driver executing in a guest virtual machine; generating, by the backend block service driver, a translated command based on the first command by translating a virtual parameter of the first command to a physical parameter associated with a physical resource; submitting, by the backend block service driver, the translated command to an input/output queue to be processed by the physical resource based on the physical parameter; and submitting, by the backend block service driver, a completion status entry to the buffer, the completion status entry indicative of completion of a direct memory access operation that copies data between the physical resource and a guest memory buffer corresponding to the guest virtual machine.

Abstract: A disclosed example includes accessing, by a backend block service driver in an input/output virtual machine executing on one or more processors, a first command submitted to a buffer by a paravirtualized input/output frontend block driver executing in a guest virtual machine; generating, by the backend block service driver, a translated command based on the first command by translating a virtual parameter of the first command to a physical parameter associated with a physical resource; submitting, by the backend block service driver, the translated command to an input/output queue to be processed by the physical resource based on the physical parameter; and submitting, by the backend block service driver, a completion status entry to the buffer, the completion status entry indicative of completion of a direct memory access operation that copies data between the physical resource and a guest memory buffer corresponding to the guest virtual machine.

Abstract: A disclosed example includes accessing, by virtual nonvolatile memory in a virtual machine monitor executing on one or more processors, a first command submitted to a guest queue by a native nonvolatile memory driver executing in a guest virtual machine; generating, by the virtual nonvolatile memory, a translated command based on the first command by translating a virtual parameter of the first command to a physical parameter associated with physical nonvolatile memory; submitting, by the virtual nonvolatile memory, the translated command to a shadow queue to be processed by the physical nonvolatile memory based on the physical parameter; and submitting, by the virtual nonvolatile memory, a completion status entry to the guest queue, the completion status entry indicative of completion of a direct memory access operation that copies data between the physical nonvolatile memory and a guest memory buffer corresponding to the guest virtual machine.

Abstract: Methods and apparatus to process commands from virtual machines, said methods include: accessing, by a virtual nonvolatile memory device in a virtual machine monitor executing on one or more processors, a first command submitted to a guest queue by a native nonvolatile memory driver executing in a guest virtual machine; generating, by the virtual nonvolatile memory device, a translated command based on the first command by translating a virtual parameter of the first command to a physical parameter associated with a physical nonvolatile memory device; submitting, by the virtual nonvolatile memory device, the translated command to a shadow queue to be processed by the physical nonvolatile memory device based on the physical parameter; and submitting, by the virtual nonvolatile memory device, a completion status entry to the guest queue, the completion status entry indicative of completion of a direct memory access operation that copies data between the physical nonvolatile memory device and a guest memory buff