This bug is awaiting verification that the linux-azure/6.2.0-1009.9
kernel in -proposed solves the problem. Please test the kernel and
update this bug with the results. If the problem is solved, change the
tag 'verification-needed-lunar' to 'verification-done-lunar'. If the
problem still exists, change the tag 'verification-needed-lunar' to
'verification-failed-lunar'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: kernel-spammed-lunar-linux-azure verification-needed-lunar

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-azure in Ubuntu.
https://bugs.launchpad.net/bugs/2004090

Title:
  Azure: Performance improvement for TDX

Status in linux-azure package in Ubuntu:
  Fix Released
Status in linux-azure source package in Kinetic:
  Fix Released

Bug description:
  SRU Justification

  [Impact]

  ms_hyperv_init_platform() hides HV_MSR_REFERENCE_TSC_AVAILABLE for TDX
  guests in favor of Invariant-TSC. In this case, we should also
  downgrade the rating of hyperv_cs_msr.rating, so Invariant-TSC can be
  used by default.

  [Fix]

  https://github.com/dcui/tdx.git
  367f18c06ac999c2822b0c24f50a87994635d4bd

  [Where things could go wrong]

  TDX guests may perform worse.

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