https://lists.ubuntu.com/archives/kernel-team/2022-August/132504.html
https://lists.ubuntu.com/archives/kernel-team/2022-August/132508.html

Patches have been sent to mailing list and applied.

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https://bugs.launchpad.net/bugs/1984034

Title:
  Backport patches needed to allow live migration under SEV

Status in linux-gcp package in Ubuntu:
  New
Status in linux-gcp source package in Focal:
  New
Status in linux-gcp source package in Jammy:
  New

Bug description:
  https://canonical.my.salesforce.com/5004K000009oeuI

  Upstream (v5.16) patches needed to allow live migration of
  confidential VMs.

  [Impact]
  No support for live-migration of confidential VMs currently

  [Fix]
  Backport 5 patches from v5.16

  [Test]
  GCP confirmed that live-migration works with these patches.

  [Regression Potential]
  This was never working so there should be low risk of regression.
  Most of the changes are KVM-related so could have an impact on KVM.
  However most of the changes are new code so risk is low.

  
  More details in the SF case.

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