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

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Message-ID: <e9d255f0-82d9-4c6d-b854-e3ba1ca0e8e2@arm.com>
Date: Tue, 11 Feb 2025 17:21:43 -0600
From: Stuart Yoder <stuart.yoder@....com>
To: Jarkko Sakkinen <jarkko@...nel.org>
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 2/11/25 3:08 PM, Jarkko Sakkinen wrote:
> 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.

Ok, will do.

Thanks,
Stuart