ACK: [SRU][Noble][PATCH v2 0/1] UBUNTU: [Config]: Configure TPM drivers as builtins for arm64 in annotations

[Jacob Martin]

Acked-by: Jacob Martin <jacob.martin at canonical.com>

On 5/28/24 10:53 AM, mitchell.augustin at canonical.com wrote:
> From: Mitchell Augustin <mitchell.augustin at canonical.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/2037688
> 
> [Impact]
> 
> On Grace systems, the IMA driver emits the following log:
> 
> ima: No TPM chip found, activating TPM-bypass!
> 
> This occurs because the IMA driver initializes before we are able to detect
> the TPM. This will always be the case when the drivers required to
> communicate with the TPM, spi_tegra210_quad and tpm_tis_spi, are built as
> modules.
> 
> [Test case]
> 
> This change has been applied to the kernel in the following PPA, and
> both the 64k and 4k page size variants have been verified to allow
> the TPM to load as expected on our Grace machine:
> https://launchpad.net/~mitchellaugustin/+archive/ubuntu/grace-tpm-config-patch-4-24
> 
> [Fix]
> 
> Having these drivers as built-ins ensures that the TPM is available before
> the IMA driver initializes.
> 
> [Regression potential]
> 
> The only potential regression I could expect is the increased binary
> size
> due to the additional modules being built-in
> 
> Mitchell Augustin (1):
>    UBUNTU: [Config]: Configure TPM drivers as builtins for arm64 in
>      annotations
> 
>   debian.master/config/annotations | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>