| From: |
| Stuart Yoder <stuart.yoder-AT-arm.com> |
| To: |
| linux-integrity-AT-vger.kernel.org, jarkko-AT-kernel.org, peterhuewe-AT-gmx.de, jgg-AT-ziepe.ca, sudeep.holla-AT-arm.com, rafael-AT-kernel.org, lenb-AT-kernel.org |
| Subject: |
| [PATCH 0/4] Add support for the TPM FF-A start method |
| Date: |
| Mon, 10 Feb 2025 17:22:23 -0600 |
| Message-ID: |
| <20250210232227.97761-1-stuart.yoder@arm.com> |
| Cc: |
| linux-acpi-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org |
| Archive-link: |
| Article |
These patches add support for the CRB FF-A start method defined
in the TCG ACPI specification v1.4 and the FF-A ABI defined
in the Arm TPM Service CRB over FF-A (DEN0138) specification.
(https://developer.arm.com/documentation/den0138/latest/)
FF-A is a messaging framework for Arm-based systems and in the
context of the TPM driver is used to signal 'start' to a CRB-based
TPM service which is hosted in an FF-A secure partition running in
TrustZone.
The first patch adds an FF-A driver to handle the FF-A messaging when
communicating with a CRB-based TPM secure partition built on FF-A.
The driver is probed when the TPM secure partition is discovered by
the Linux FF-A infrastructure.
The second patch consolidates the check for idle support in the CRB
driver to one place.
The third patch defines the new ACPI start method enumeration for
CRB over FF-A.
The fourth patch adds support for the FF-A ACPI start method to
the TPM crb driver.
Stuart Yoder (4):
tpm_crb: implement driver compliant to CRB over FF-A
tpm_crb: refactor check for idle support into TPM into inline function
ACPICA: add start method for Arm FF-A
tpm_crb: add support for the Arm FF-A start method
drivers/char/tpm/Kconfig | 9 ++
drivers/char/tpm/Makefile | 1 +
drivers/char/tpm/ffa_crb.c | 310 +++++++++++++++++++++++++++++++++++++
drivers/char/tpm/ffa_crb.h | 30 ++++
drivers/char/tpm/tpm_crb.c | 81 +++++++++-
include/acpi/actbl3.h | 1 +
6 files changed, 426 insertions(+), 6 deletions(-)
create mode 100644 drivers/char/tpm/ffa_crb.c
create mode 100644 drivers/char/tpm/ffa_crb.h
--
2.34.1
