Techniques for virtual machine transfer and resource management

A method, comprising:

• executing instructions by one or more cores coupled to a memory controller to implement a first virtualization environment comprising a hypervisor and a plurality of virtual machines (VMs);
• selectively sharing an input/output virtualization (IOV) device by the plurality of VMs, wherein the IOV device is to expose capabilities in a plurality of memory-mapped IO (MMIO) registers, the hypervisor to access the plurality of MMIO registers to determine a subset of the capabilities to be provided to a first VM of the plurality of VMs, the IOV device comprising:
• a plurality of assignable device interfaces (ADIs), a first ADI of the plurality of ADIs to be assigned to the first VM to provide the subset of capabilities to the first VM, the first ADI and the first VM associated with a first address space;
• migrating an architectural state stored in the first address space and associated with the first VM to a second virtualization environment while the first VM is in a live or active state, the architectural state including a state of the first IOV device, wherein the second virtualization environment includes a second IOV device, wherein migrating comprises transmitting the architectural state to the second virtualization environment, wherein the first VM including the architectural state is to be restored in the second virtualization environment.

A non-transitory machine-readable medium having program code stored thereon which, when executed by a machine, causes the machine to perform operations, comprising:

• executing instructions by one or more cores coupled to a memory controller to implement a first virtualization environment comprising a hypervisor and a plurality of virtual machines (VMs);
• selectively sharing an input/output virtualization (IOV) device by the plurality of VMs, wherein the IOV device is to expose capabilities in a plurality of memory-mapped IO (MMIO) registers, the hypervisor to access the plurality of MMIO registers to determine a subset of the capabilities to be provided to a first VM of the plurality of VMs, the IOV device comprising:
• a plurality of assignable device interfaces (ADIs), a first ADI of the plurality of ADIs to be assigned to the first VM to provide the subset of capabilities to the first VM, the first ADI and the first VM associated with a first address space;
• migrating an architectural state stored in the first address space and associated with the first VM to a second virtualization environment while the first VM is in a live or active state, the architectural state including a state of the first IOV device, wherein the second virtualization environment includes a second IOV device, wherein migrating comprises transmitting the architectural state to the second virtualization environment, wherein the first VM including the architectural state is to be restored in the second virtualization environment.