The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 2025
Filed:
Dec. 23, 2022
Red Hat, Inc., Raleigh, NC (US);
Michael Tsirkin, Yokneam Illit, IL;
Red Hat, Inc., Raleigh, NC (US);
Abstract
Systems and methods for efficient peripheral device software request queue shadowing for virtual machines can include creating a virtual machine and assigning a peripheral device to it. They can also include assigning, to the peripheral device, a first process address space identifier (PASID) associated with a shadow memory buffer and a second PASID associated with a device data buffer. They can further include causing a host input/output memory management unit (IOMMU) to identify a software request in the shadow memory buffer, and fetching, from the shadow memory buffer, the software request and a guest memory address of data requested to be accessed. They can also include, causing the host IOMMU to identify the data in the device data buffer, and transmitting the data, from the guest memory, to the peripheral device.