linux-kernel - Re: [PATCH 0/4] Add support for the TPM FF-A start method

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Message-ID: <Z6sinfNeBynQH0zs@bogus>
Date: Tue, 11 Feb 2025 10:12:45 +0000
From: Sudeep Holla <sudeep.holla@....com>
To: Stuart Yoder <stuart.yoder@....com>
Cc: <linux-integrity@...r.kernel.org>, <jarkko@...nel.org>,
	Sudeep Holla <sudeep.holla@....com>, <peterhuewe@....de>,
	<jgg@...pe.ca>, <rafael@...nel.org>, <lenb@...nel.org>,
	<linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/4] Add support for the TPM FF-A start method

On Mon, Feb 10, 2025 at 05:22:23PM -0600, Stuart Yoder wrote:
> 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.
>

All the FF-A related changes look good to me.

Acked-by: Sudeep Holla <sudeep.holla@....com>

-- 
Regards,
Sudeep