[Bug 2080322] Re: [SRU] Disable CONFIG_TCG_TPM2_HMAC to avoid performance loss after v6.10

This bug is awaiting verification that the linux-
hwe-6.11/6.11.0-9.9~24.04.1 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-
hwe-6.11' to 'verification-done-noble-linux-hwe-6.11'. If the problem
still exists, change the tag 'verification-needed-noble-linux-hwe-6.11'
to 'verification-failed-noble-linux-hwe-6.11'.


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-hwe-6.11-v2 verification-needed-noble-linux-hwe-6.11

--
You received this bug notification because you are subscribed to linux
in Ubuntu.
Matching subscriptions: Bgg, Bmail, Nb
https://bugs.launchpad.net/bugs/2080322

Title:
[SRU] Disable CONFIG_TCG_TPM2_HMAC to avoid performance loss after
v6.10

Status in linux package in Ubuntu:
Fix Released
Status in linux-oem-6.11 package in Ubuntu:
Invalid
Status in linux source package in Noble:
Invalid
Status in linux-oem-6.11 source package in Noble:
In Progress
Status in linux source package in Oracular:
Fix Released
Status in linux-oem-6.11 source package in Oracular:
Invalid

Bug description:
[Impact]
significant delays at bootup, the bootup time is 7 sec when this feature is disabled,
but 20 sec when it's enabled.

[Fix]
v6.10-rc1 introduce encryption overhead to all kernel to TPM transactions,
Disable it by default until there is a real fix.

[Test]
Tested on hardware, bootup is 7 sec as 6.8 noble kernel.

[Where problems could occur]
It may less security or break TPM.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2080322/+subscriptions