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Virtual Event | September 15-16, 2021
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Wednesday, September 15 • 05:00 - 05:25
Sharing IOMMU PageTables with TDP in KVM - Lu Baolu & Zhao Yan, Intel Corporation

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With assigned devices, IOMMU page tables actually hold the same mappings as TDP in KVM if IOMMU shadowed page table is not required. Sharing IOMMU page tables with TDP has the advantages of reduced memory footprint, unified page table for dirty page tracking during migration and page fault handling, probably higher performance by reducing unnecessary EPT/NPT zap, EPT/NPT pre-population, etc… This topic researches the challenges in both KVM and IOMMU subsystems and proposes an architecture to achieve this.
Speakers
LB

Lu Baolu

Senior Software Engineer, Intel Corporation
Baolu, employed by Intel, is the Linux kernel maintainer for Intel VT-d implementation. In recent years, he focused on technologies such as thunderbolt vulnerabilities, scalable I/O virtualization and shared virtual address.
YZ

Yan Zhao

Senior Software Engineer, Intel Corporation
Yan, employed by Intel, has more than 10 years experiences in virtualization software development. In recent yeas, she focused on KVM and Linux kernel support for device direct assignment.

KVM 2021 sharing TDP IOMMU pdf
Wednesday September 15, 2021 05:00 - 05:25 UTC
TBA
  KVM Track 1
  • Presentation Slides Attached Yes