18499028. PROBATION OF DIRECT MEMORY ACCESS DEVICE USED FOR DIRECT DEVICE ASSIGNMENT (Microsoft Technology Licensing, LLC)

PROBATION OF DIRECT MEMORY ACCESS DEVICE USED FOR DIRECT DEVICE ASSIGNMENT

Organization Name

Microsoft Technology Licensing, LLC

Inventor(s)

Jin Lin of Seattle WA US

Cody Dean Hartwig of Seattle WA US

Jason Stewart Wohlgemuth of Seattle WA US

PROBATION OF DIRECT MEMORY ACCESS DEVICE USED FOR DIRECT DEVICE ASSIGNMENT

This abstract first appeared for US patent application 18499028 titled 'PROBATION OF DIRECT MEMORY ACCESS DEVICE USED FOR DIRECT DEVICE ASSIGNMENT

Original Abstract Submitted

Probation of direct memory access (DMA) device used for direct device assignment. A virtualization computer system identifies a peripheral device as being removed from a direct assignment to a first operating context of a virtualization environment. The peripheral device is DMA capable. The virtualization computer system assigns the peripheral device to a second operating context of the virtualization environment and initiates a device validation against the peripheral device. Based on the device validation indicating that the peripheral device is normal, the virtualization computer system reassigns the peripheral device to a third operating context of the virtualization environment. Based on the device validation indicating that the peripheral device is abnormal, the virtualization computer system excludes the peripheral device from assignment to a third operating context of the virtualization environment.