This bug is awaiting verification that the linux-gcp-
fips/6.8.0-1035.37+fips1 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-noble-linux-gcp-fips' to
'verification-done-noble-linux-gcp-fips'. If the problem still exists,
change the tag 'verification-needed-noble-linux-gcp-fips' to
'verification-failed-noble-linux-gcp-fips'.


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-noble-linux-gcp-fips-v2 
verification-needed-noble-linux-gcp-fips

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Packages, which is subscribed to linux-gcp in Ubuntu.
https://bugs.launchpad.net/bugs/2111956

Title:
  Add SVSM vTPM support for AMD SEV-SNP confidential VMs

Status in linux-gcp package in Ubuntu:
  New
Status in linux-gcp source package in Noble:
  Fix Released
Status in linux-gcp source package in Plucky:
  Fix Released

Bug description:
  SRU Justification

  [Impact]
  Google has made a request for SVSM vTPM support in linux-gcp kernels 6.8 and 
later.

  [Fix]
  Patches requested in the support case:
  980a573621ea ("tpm: Make chip->{status,cancel,req_canceled} opt")
  770de678bc28 ("x86/sev: Add SVSM vTPM probe/send_command functions")
  b2849b072366 ("svsm: Add header with SVSM_VTPM_CMD helpers")
  93b7c6b3ce91 ("tpm: Add SNP SVSM vTPM driver")
  e396dd85172c ("x86/sev: Register tpm-svsm platform device")

  The config for all kernels must have CONFIG_TCG_SVSM=y

  6.8 also requires the changes from this pull request:
  
https://lore.kernel.org/lkml/20240716095557.GAZpZDrdC3HA0Zilxr@fat_crate.local/
  and CONFIG_SEV_GUEST=m/y and CONFIG_TSM_REPORTS=y

  [Test Plan]
  Testing will be performed by Google.

  [Regression Potential]
  These changes are in core kernel security modules, so care should be taken to 
ensure that patches are applied correctly to avoid creating new security 
vulnerabilities.

  [Other]
  SF #00409503

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