linux-kernel - Re: [EXT] [PATCH v6 3/4] crypto: caam - add in-kernel interface for blob generator

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Message-ID: <23cd140f-1046-7059-c9bd-ca4aac1d5183@pengutronix.de>
Date:   Tue, 22 Mar 2022 08:32:34 +0100
From:   Ahmad Fatoum <a.fatoum@...gutronix.de>
To:     Pankaj Gupta <pankaj.gupta@....com>,
        Horia Geanta <horia.geanta@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>
Cc:     "linux-security-module@...r.kernel.org" 
        <linux-security-module@...r.kernel.org>,
        Eric Biggers <ebiggers@...nel.org>,
        David Gstir <david@...ma-star.at>,
        Matthias Schiffer <matthias.schiffer@...tq-group.com>,
        Sumit Garg <sumit.garg@...aro.org>,
        Jan Luebbe <j.luebbe@...gutronix.de>,
        Richard Weinberger <richard@....at>,
        "tharvey@...eworks.com" <tharvey@...eworks.com>,
        Franck Lenormand <franck.lenormand@....com>,
        James Morris <jmorris@...ei.org>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        David Howells <dhowells@...hat.com>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        "keyrings@...r.kernel.org" <keyrings@...r.kernel.org>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "linux-integrity@...r.kernel.org" <linux-integrity@...r.kernel.org>,
        James Bottomley <jejb@...ux.ibm.com>,
        "Serge E. Hallyn" <serge@...lyn.com>
Subject: Re: [EXT] [PATCH v6 3/4] crypto: caam - add in-kernel interface for
 blob generator

Hello Pankaj,

On 22.03.22 07:25, Pankaj Gupta wrote:
> Hi Ahmad,
> 
> Suggested to define macro with more details.
> Please find comments in-line.
> 

> len = 4 + (4 + ALIGN(keymod_len, 4)) + 2*(4 + 4 + 
>>>>> + CAAM_PTR_SZ_MAX) + 4;
> 
>> +/* header + (key mod immediate) + 2x seq_intlen pointers + op */
>> +#define CAAM_BLOB_DESC_BYTES_MAX \
>> +       (CAAM_CMD_SZ + \
>> +        CAAM_CMD_SZ + CAAM_BLOB_KEYMOD_LENGTH + \
>> +        2 * (CAAM_CMD_SZ + CAAM_PTR_SZ_MAX) + \
>> +        CAAM_CMD_SZ)
>> +
> 
> Suggested to replace the above macro like below:
> 
> +#define CAAM_BLOB_DESC_BYTES_MAX \			
> +       (CAAM_CMD_SZ + \					/* Command to initialize & stating length of  descriptor */
> +        CAAM_CMD_SZ + CAAM_BLOB_KEYMOD_LENGTH + \	/* Command to append the key-modifier + followed by the key-modifier data */
> +        (CAAM_CMD_SZ + CAAM_PTR_SZ_MAX) + \		/* Command to include input plain key and pointer to the input key */
> +        (CAAM_CMD_SZ + CAAM_PTR_SZ_MAX) + \		/* Command to include output-key blob and pointer to the output-key blob */
> +        CAAM_CMD_SZ)						/* Command describing the Operation to perform */


Sure thing, will do for v7. Otherwise, if all looks good to you,
can I have your Reviewed-by?

Thanks,
Ahmad

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