linux-kernel - Re: [PATCH 1/4] tpm_crb: implement driver compliant to CRB over FF-A

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Message-ID: <Z6u8Yb-NIs0_v2gm@kernel.org>
Date: Tue, 11 Feb 2025 23:08:49 +0200
From: Jarkko Sakkinen <jarkko@...nel.org>
To: Stuart Yoder <stuart.yoder@....com>
Cc: linux-integrity@...r.kernel.org, peterhuewe@....de, jgg@...pe.ca,
	sudeep.holla@....com, rafael@...nel.org, lenb@...nel.org,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] tpm_crb: implement driver compliant to CRB over FF-A

On Mon, Feb 10, 2025 at 05:22:24PM -0600, Stuart Yoder wrote:
> The Arm specification TPM Service CRB over FF-A specification
> defines the FF-A messages to interact with a CRB-based TPM
> implemented as an FF-A secure partition.
> 
> Spec URL:
> https://developer.arm.com/documentation/den0138/latest/
> 
> This driver is probed when a TPM Secure Partition is
> discovered by the FF-A subsystem. It exposes APIs
> used by the TPM CRB driver to send notifications to
> the TPM.
> 
> Signed-off-by: Stuart Yoder <stuart.yoder@....com>
> ---
>  drivers/char/tpm/Kconfig   |   9 ++
>  drivers/char/tpm/Makefile  |   1 +
>  drivers/char/tpm/ffa_crb.c | 310 +++++++++++++++++++++++++++++++++++++
>  drivers/char/tpm/ffa_crb.h |  30 ++++

Let's use tpm_ prefix for these.

BR, Jarkko