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Virtual Event | September 15-16, 2021
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Thursday, September 16 • 06:00 - 06:25
TDX Live Migration - Wei Wang, Intel Corp.

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The Intel Trust Domain Extension (TDX) technology extends VMX and MKTME to enhance guest data security by isolating guests from host software, including VMM/hypervisor. Live migration support for such isolated guests (i.e. TDs) facilitates the deployment of TD guests in the cloud. This talk presents the QEMU/KVM design of TDX live migration and initial PoC results for the migration performance evaluation. A common framework is added to the QEMU migration to support TD guests and other similar technologies (e.g. SEV guests). For TDX live migration, the guest shared memory pages are migrated in plaintexts. The guest private memory pages, vCPU states and TD scope states are encrypted via a migration key when they are exported by KVM from the TDX module. A migration stream in the workflow has a KVM device created and the device creates shared memory between KVM and the QEMU migration thread to transport the encrypted guest states.


Wei Wang

Senior Software Engineer, Intel Corp.
Wei is currently a software developer at Intel. He earned a Master degree from the University of Ottawa, Canada. Wei has rich experience in the virtualization field and he worked on many projects such as network virtualization, VM live migration, memory ballooning, PMU virtualization... Read More →

Thursday September 16, 2021 06:00 - 06:25 UTC
  KVM Track 1
  • Presentation Slides Attached Yes