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Date:   Thu, 1 Apr 2021 15:59:26 +0200 (CEST)
From:   Richard Weinberger <richard@nod.at>
To:     Sumit Garg <sumit.garg@linaro.org>
Cc:     Ahmad Fatoum <a.fatoum@pengutronix.de>,
        Jarkko Sakkinen <jarkko@kernel.org>,
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        davem <davem@davemloft.net>,
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        kernel <kernel@pengutronix.de>,
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Subject: Re: [PATCH v1 0/3] KEYS: trusted: Introduce support for NXP
 CAAM-based trusted keys
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Thread-Topic: KEYS: trusted: Introduce support for NXP CAAM-based trusted keys
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Sumit,

----- Ursprüngliche Mail -----
> Von: "Sumit Garg" <sumit.garg@linaro.org>
> In this case why would one prefer to use CAAM when you have standards
> compliant TPM-Chip which additionally offers sealing to specific PCR
> (integrity measurement) values.

I don't think we can dictate what good/sane solutions are and which are not.
Both CAAM and TPM have pros and cons, I don't see why supporting both is a bad idea.

>> > IMHO allowing only one backend at the same time is a little over simplified.
>>
>> It is, but I'd rather leave this until it's actually needed.
>> What can be done now is adopting a format for the exported keys that would
>> make this extension seamless in future.
>>
> 
> +1

As long we don't make multiple backends at runtime impossible I'm
fine and will happily add support for it when needed. :-)

Thanks,
//richard