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. 10, 2024
Filed:
Jan. 18, 2022
Vmware Llc, Palo Alto, CA (US);
Alexander Dean Gotsis, Mountain View, CA (US);
Jiajun Cao, Worcester, MA (US);
Radu Rugina, Sunnyvale, CA (US);
James Eugene Chow, Saratoga, CA (US);
Srihari Venkatesan, San Jose, CA (US);
Jeffrey W. Sheldon, Los Altos, CA (US);
Kalaiselvi Sengottuvel, Fremont, CA (US);
VMware LLC, Palo Alto, CA (US);
Abstract
Techniques for implementing IOMMU-based DMA tracking for enabling live migration of VMs that use passthrough physical devices are provided. In one set of embodiments, these techniques leverage an IOMMU feature known as dirty bit tracking which is available in most, if not all, modern IOMMU implementations. The use of this feature allows for the tracking of passthrough DMA in a manner that is device/vendor/driver agnostic, resulting in a solution that is universally applicable to all passthrough physical devices.