** Description changed:

  [Impact]
  
  Intel has requested to support the TDX (trust domain extension) guest
  attestation driver interface. In a TDX guest "attestation" is used to
  verify the trustworthiness of a TD (trusted domain) before provisioning
  secrets to the TD (i.e, encrypted keys to mount an encrypted rootfs,
  etc.).
  
  During the TD boot the initial contents and configurations are recorded
  by the Intel TDX module in the build time measurement register (MRTD).
  At TD runtime, the Intel TDX module reuses the Intel SGX attestation
  infrastructure to provide support for attesting to these information.
  
  This driver is targeting 6.x upstream, so we need to backport the
  upstream patches as SAUCE patches to properly support this feature in
  5.19.
  
  [Fix]
  
  Backport upstream TDX attestation driver.
  
  [Test case]
  
- Tests have been performed by IBM, a test-case is included in the patch
+ Tests have been performed by Intel, a test-case is included in the patch
  set as a kernel selftest (called 'tdx').
  
  TODO: consider to integrate this test in our testing infrastructure once
  this feature has been merged.
  
  [Regression potential]
  
  This feature is self-contained, it's only available on amd64 and it
  doesn't affect any other amd64 code. So we could only experience
  regressions on amd64 systems that are using the TDX feature.

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https://bugs.launchpad.net/bugs/1988120

Title:
  Support Intel TDX guest attestation driver

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Kinetic:
  Fix Committed

Bug description:
  [Impact]

  Intel has requested to support the TDX (trust domain extension) guest
  attestation driver interface. In a TDX guest "attestation" is used to
  verify the trustworthiness of a TD (trusted domain) before
  provisioning secrets to the TD (i.e, encrypted keys to mount an
  encrypted rootfs, etc.).

  During the TD boot the initial contents and configurations are
  recorded by the Intel TDX module in the build time measurement
  register (MRTD). At TD runtime, the Intel TDX module reuses the Intel
  SGX attestation infrastructure to provide support for attesting to
  these information.

  This driver is targeting 6.x upstream, so we need to backport the
  upstream patches as SAUCE patches to properly support this feature in
  5.19.

  [Fix]

  Backport upstream TDX attestation driver.

  [Test case]

  Tests have been performed by Intel, a test-case is included in the
  patch set as a kernel selftest (called 'tdx').

  TODO: consider to integrate this test in our testing infrastructure
  once this feature has been merged.

  [Regression potential]

  This feature is self-contained, it's only available on amd64 and it
  doesn't affect any other amd64 code. So we could only experience
  regressions on amd64 systems that are using the TDX feature.

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