tree 3dc9b823907a2f6f36820fcdd2a673b0c7468e43
parent acf10d6096460874785ab951c75589c133afb66f
author Subrata Banik <subratabanik@google.com> 1703690981 +0530
committer Subrata Banik <subratabanik@google.com> 1703992722 +0000

security/tpm: Retrieve factory configuration for device w/ Google TPM

This patch enables retrieval of factory configuration data from
Google TPM devices (both Cr50 and Ti50).

This patch utilizes vendor-specific command
TPM2_CR50_SUB_CMD_GET_FACTORY_CONFIG (68).

The factory config space is a 64-bit, one-time programmable.
For the unprovisioned one, the read will be 0x0.

BUG=b:317880956
TEST=Able to retrieve the factory config from google/screebo.

Change-Id: Ifd0e850770152a03aa46d7f8bbb76f7520a59081
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79736
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>