On Wed, Mar 05, 2025 at 11:36:06AM -0600, Stuart Yoder wrote: > Firmware Framework for Arm A-profile (FF-A) is a messaging framework > for Arm-based systems, and in the context of the TPM CRB driver is used > to signal 'start' to a CRB-based TPM service which is hosted in an > FF-A secure partition running in TrustZone. > > 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/ > > 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. > > The fifth patch adds documentation explaining how the CRB driver > and FF-A relate. > > Version 6 > -in tpm_crb removed unnecessary brackets from if statement and > fixed comment style > -noticed and fixed bug in patch 2, polarity of return value > from tpm_crb_has_idle() was wrong and wasn't caught in past > testing > -added Reviewed-by tag to patches 2 and 5 > > Version 5 > -tpm_ffa_crb patch: removed module version > -tpm_ffa_crb patch: fixed module description > -tpm_ffa_crb patch: updated comment on mutex declaration > -reworded commit message for patch 2 as per Jarkko's > suggestion > -added Acked tag by Sudeep to patch 1 for FF-A changes > -added Reviewed-by tag to patches 3 and 4 > > Version 4 > -fix warning from kernel test robot in patch 1 > -fix warnings from checkpatch.pl --strict > -clean up unnecessary parenthesis usage > -update variable declaration to be reverse tree order > -document exported functions in tpm_crb_ffa driver > -remove unnecessary author and maintainer info in tpm_crb_ffa driver > -fix declaration of variables to be in reverse tree order > > Version 3 > -changed prefixes used throughout patch series to tpm_crb_ffa* > > Version 2 > -updates to cover letter to define FF-A > -added new patch with documentation > -created pull request in ACPIA and added link to the patch > updating actbl3.h > -added tpm_ prefix to the FF-A CRB driver > > Stuart Yoder (5): > tpm_crb: implement driver compliant to CRB over FF-A > tpm_crb: clean-up and refactor check for idle support > ACPICA: add start method for Arm FF-A > tpm_crb: add support for the Arm FF-A start method > Documentation: tpm: add documentation for the CRB FF-A interface > > Documentation/security/tpm/tpm_ffa_crb.rst | 65 ++++ > drivers/char/tpm/Kconfig | 9 + > drivers/char/tpm/Makefile | 1 + > drivers/char/tpm/tpm_crb.c | 105 +++++-- > drivers/char/tpm/tpm_crb_ffa.c | 348 +++++++++++++++++++++ > drivers/char/tpm/tpm_crb_ffa.h | 25 ++ > include/acpi/actbl3.h | 1 + > 7 files changed, 535 insertions(+), 19 deletions(-) > create mode 100644 Documentation/security/tpm/tpm_ffa_crb.rst > create mode 100644 drivers/char/tpm/tpm_crb_ffa.c > create mode 100644 drivers/char/tpm/tpm_crb_ffa.h > > -- > 2.34.1 > OK, I guess we can apply this? Any objections? I'll apply this over the weekend if nothing alarming comes up. Thanks for the effort and patience! BR, Jarkko
