From patchwork Wed Feb 19 20:10:09 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stuart Yoder X-Patchwork-Id: 13982838 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 4054F21B9E0; Wed, 19 Feb 2025 20:10:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739995828; cv=none; b=XBes+jaCn8W3yKg9svOo2xXaux22+HM/LUuK15XdeTcqkeUmW8CFBoCgza2V7/tQ4bzNcDAcv2yLdDEVECvlX4cNRE8hy8wxS59wsePfAkM1qDrHQ0p6klFz3qPZ3Dbm2pA0kQx4gLkY+OYSnfexlIuVuQJBztr+hwJIieQvIj0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739995828; c=relaxed/simple; bh=zDq3K0cRUJ0dtWhls7Hgc8PZm4L+F8WCGJO3BOMagfA=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=pvXUDvODdqCbIsI8V1cfYdvGMuwaH52CdnsoNnVSUGdX8NxEqIyrybUoJ22FpTBA3DHiqO4qsKeRG5V858sCSTddYiOkE3xKOyToqrGWPe6BAmBLS0yZcIh4MX7kO3mbXVks3Ma4nUQGuYuwZ8eA+xGwPWHykyY34wxulAVvVoU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id A8856152B; Wed, 19 Feb 2025 12:10:43 -0800 (PST) Received: from beelzebub.ast.arm.com (unknown [10.118.29.240]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 0303F3F59E; Wed, 19 Feb 2025 12:10:24 -0800 (PST) From: Stuart Yoder To: linux-integrity@vger.kernel.org, jarkko@kernel.org, peterhuewe@gmx.de, jgg@ziepe.ca, sudeep.holla@arm.com, rafael@kernel.org, lenb@kernel.org Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 0/5] Add support for the TPM FF-A start method Date: Wed, 19 Feb 2025 14:10:09 -0600 Message-Id: <20250219201014.174344-1-stuart.yoder@arm.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-integrity@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 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 unecessary 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