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* [PATCH v6 0/5] Add support for the TPM FF-A start method
@ 2025-03-05 17:36 Stuart Yoder
  2025-03-05 17:36 ` [PATCH v6 1/5] tpm_crb: implement driver compliant to CRB over FF-A Stuart Yoder
                   ` (7 more replies)
  0 siblings, 8 replies; 21+ messages in thread
From: Stuart Yoder @ 2025-03-05 17:36 UTC (permalink / raw)
  To: linux-integrity, jarkko, peterhuewe, jgg, sudeep.holla, rafael,
	lenb
  Cc: linux-acpi, linux-kernel

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


^ permalink raw reply	[flat|nested] 21+ messages in thread

end of thread, other threads:[~2025-03-12 20:47 UTC | newest]

Thread overview: 21+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2025-03-05 17:36 [PATCH v6 0/5] Add support for the TPM FF-A start method Stuart Yoder
2025-03-05 17:36 ` [PATCH v6 1/5] tpm_crb: implement driver compliant to CRB over FF-A Stuart Yoder
2025-03-06 22:43   ` Jarkko Sakkinen
2025-03-05 17:36 ` [PATCH v6 2/5] tpm_crb: clean-up and refactor check for idle support Stuart Yoder
2025-03-05 17:36 ` [PATCH v6 3/5] ACPICA: add start method for Arm FF-A Stuart Yoder
2025-03-05 17:36 ` [PATCH v6 4/5] tpm_crb: add support for the Arm FF-A start method Stuart Yoder
2025-03-05 17:36 ` [PATCH v6 5/5] Documentation: tpm: add documentation for the CRB FF-A interface Stuart Yoder
2025-03-06 22:45 ` [PATCH v6 0/5] Add support for the TPM FF-A start method Jarkko Sakkinen
2025-03-10 11:19 ` Jarkko Sakkinen
2025-03-11 15:28   ` Sudeep Holla
2025-03-12  6:06     ` Jarkko Sakkinen
2025-03-11 15:21 ` Build error on -next due to tpm_crb.c changes? (was: Re: [PATCH v6 0/5] Add support for the TPM FF-A start method) Thorsten Leemhuis
2025-03-11 15:53   ` Build error on -next due to tpm_crb.c changes? Stuart Yoder
2025-03-11 16:51     ` Thorsten Leemhuis
2025-03-11 18:25       ` Stuart Yoder
2025-03-11 21:17         ` Sudeep Holla
2025-03-12 20:47           ` Stuart Yoder
2025-03-12  2:51       ` Stuart Yoder
2025-03-12  6:48         ` Thorsten Leemhuis
2025-03-12  6:05       ` Jarkko Sakkinen
2025-03-12  6:00   ` Build error on -next due to tpm_crb.c changes? (was: Re: [PATCH v6 0/5] Add support for the TPM FF-A start method) Jarkko Sakkinen

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