Enable Microsoft fTPM driver on Arm Foundation v8 models.

[javieralso-arm]

Add bindings for Microsoft fTPM driver on Foundation v8 models.

Signed-off-by: Javier Almansa Sobrino [email protected]

[jbech-linaro]

Acked-by: Joakim Bech <[email protected]>

[javieralso-arm]

We are using an fTPM based on the Official TPM 2.0 Reference Implementation by Microsoft (https://github.com/microsoft/ms-tpm-20-ref) for a PoC of Measured Boot on Arm Trusted Firmware. This patch enables adds a binding to enable the required driver on the Kernel.

[jenswi-linaro]

@javieralso-arm Is this something that you intend to upstream also?

[javieralso-arm]

@javieralso-arm Is this something that you intend to upstream also?

@jenswi-linaro No, no need for that, as long as it can be merged to your optee branch. I'm preparing a manifest for OPTEE to setup a build including Measured Boot and an fTPM and I am planing to use the linaro-swg Kernel as done for the fvp manifest, for instance.

[jenswi-linaro]

Fair enough, keep in mind that we rebase this branch to a new kernel release from time to time.

[javieralso-arm]

Fair enough, keep in mind that we rebase this branch to a new kernel release from time to time.

Thank you very much for the heads up. We just want to have a PoC of a TPM service using Measured Boot so I will use a fixed revision on the manifest and I may update it from time to time. It is not a problem if the kernel is slightly outdated as long as it works and the functionality can be shown.

[jforissier]

@javieralso-arm please note that although the branch is rebased occasionally, we do create release tags (such as optee-3.12.0). So at some point you could reference such a tag.

[javieralso-arm]

@javieralso-arm please note that although the branch is rebased occasionally, we do create release tags (such as optee-3.12.0). So at some point you could reference such a tag.

Thanks for letting me know, @jforissier. I noticed those tags on OP-TEE/* projects but I didn't realize that you are also tagging the kernel with the same tags. That's good to know.

[jforissier]

Thank you @javieralso-arm. I have merged this with a note about upstream and a link to here.