公开(公告)号：US20230229609A1

公开(公告)日：2023-07-20

申请号：US17578290

申请日：2022-01-18

Applicant: VMware, Inc.

Inventor： Alexander Dean Gotsis ,  Jiajun Cao ,  Radu Rugina ,  James Eugene Chow ,  Srihari Venkatesan ,  Jeffrey W. Sheldon ,  Kalaiselvi Sengottuvel

IPC: G06F13/28 ,  G06F9/455

CPC classification number: G06F13/28 ,  G06F9/45558 ,  G06F2009/4557

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.