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Subject: Re: [PATCH v1 3/3] KEYS: trusted: Introduce support for NXP
 CAAM-based trusted keys
To:     Richard Weinberger <richard.weinberger@gmail.com>
Cc:     Jonathan Corbet <corbet@lwn.net>,
        David Howells <dhowells@redhat.com>,
        Jarkko Sakkinen <jarkko@kernel.org>,
        James Bottomley <jejb@linux.ibm.com>,
        Mimi Zohar <zohar@linux.ibm.com>, kernel@pengutronix.de,
        James Morris <jmorris@namei.org>,
        "Serge E. Hallyn" <serge@hallyn.com>,
        =?UTF-8?Q?Horia_Geant=c4=83?= <horia.geanta@nxp.com>,
        Aymen Sghaier <aymen.sghaier@nxp.com>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        "David S. Miller" <davem@davemloft.net>,
        Udit Agarwal <udit.agarwal@nxp.com>,
        Jan Luebbe <j.luebbe@pengutronix.de>,
        David Gstir <david@sigma-star.at>,
        Franck LENORMAND <franck.lenormand@nxp.com>,
        Sumit Garg <sumit.garg@linaro.org>, keyrings@vger.kernel.org,
        Linux Crypto Mailing List <linux-crypto@vger.kernel.org>,
        linux-doc@vger.kernel.org, linux-integrity@vger.kernel.org,
        LKML <linux-kernel@vger.kernel.org>,
        LSM <linux-security-module@vger.kernel.org>
References: <cover.56fff82362af6228372ea82e6bd7e586e23f0966.1615914058.git-series.a.fatoum@pengutronix.de>
 <319e558e1bd19b80ad6447c167a2c3942bdafea2.1615914058.git-series.a.fatoum@pengutronix.de>
 <CAFLxGvxmRcvkweGSRSLGEm5MJDM4M7nzkp9FwOwmhZ+h2RE0vA@mail.gmail.com>
From:   Ahmad Fatoum <a.fatoum@pengutronix.de>
Message-ID: <91b01387-1814-0719-8a21-2beb150dfcd6@pengutronix.de>
Date:   Wed, 17 Mar 2021 15:02:59 +0100
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Hello Richard,

On 17.03.21 00:14, Richard Weinberger wrote:
> Ahmad,
> 
> On Tue, Mar 16, 2021 at 6:24 PM Ahmad Fatoum <a.fatoum@pengutronix.de> wrote:
>> +#include <keys/trusted_caam.h>
>> +#include <keys/trusted-type.h>
>> +#include <linux/build_bug.h>
>> +#include <linux/key-type.h>
>> +#include <soc/fsl/caam-blob.h>
>> +
>> +struct caam_blob_priv *blobifier;
> 
> Who is using this pointer too?
> Otherwise I'd suggest marking it static.

You're right. Will do in v2.

>>  module_param_named(source, trusted_key_source, charp, 0);
>> -MODULE_PARM_DESC(source, "Select trusted keys source (tpm or tee)");
>> +MODULE_PARM_DESC(source, "Select trusted keys source (tpm, tee or caam)");
> 
> I didn't closely follow the previous discussions, but is a module
> parameter really the right approach?
> Is there also a way to set it via something like device tree?

Compiled-on sources are considered in the order: tpm, tee then caam.
Module parameters are the only override currently available.

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