Device virtualization techniques

A system comprising:

• a bus to couple one or more physical PCIe devices with a processor;
• and
• logic to:
• enter a locked state for the one or more physical PCIe devices assigned to a virtual PCIe device,
• monitor the bus for requests to the one or more physical PCIe devices,
• in response to a request to a predetermined address of one of the physical PCIe devices in the locked state, enter an unlocked state for the physical PCIe device,
• in response to a read request to read an identifier of the physical PCIe device when the physical PCIe device is in the locked state, block the read request and provide a response to the read request with a value associated with the virtual PCIe device, and
• in response to the read request to read the identifier of the physical PCIe device when the physical PCIe device is in the unlocked state, forward the read request to the physical PCIe device.

A non-transitory machine-readable medium having instructions stored thereon configured to be executed on one or more processors to perform a method comprising:

• monitoring an interface, by a device, for requests to one or more physical I/O devices associated with a virtual I/O device;
• in response to a request to a predetermined address of one of the physical I/O devices in a locked state, enter an unlocked state for the physical I/O device;
• in response to a read request to read an identifier of the physical I/O device when the physical I/O device is in the locked state, block the read request and provide a response to the request with a value for the virtual I/O device;
• and
• in response to the read request to read the identifier of the physical I/O device when the physical I/O device is in the unlocked state, forward the read request to the physical I/O device.