linux-kernel - Re: [Tee-dev] [RFC v2 0/6] Introduce TEE based Trusted Keys support

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Message-ID: <19d9be198619e951750dedeb4d0a7f372083b42c.camel@pengutronix.de>
Date:   Thu, 01 Aug 2019 08:50:22 +0200
From:   Rouven Czerwinski <r.czerwinski@...gutronix.de>
To:     Janne Karhunen <janne.karhunen@...il.com>,
        Sumit Garg <sumit.garg@...aro.org>
Cc:     "tee-dev @ lists . linaro . org" <tee-dev@...ts.linaro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jonathan Corbet <corbet@....net>, jejb@...ux.ibm.com,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        dhowells@...hat.com, linux-security-module@...r.kernel.org,
        keyrings@...r.kernel.org, Mimi Zohar <zohar@...ux.ibm.com>,
        Casey Schaufler <casey@...aufler-ca.com>,
        linux-integrity@...r.kernel.org,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        "Serge E. Hallyn" <serge@...lyn.com>
Subject: Re: [Tee-dev] [RFC v2 0/6] Introduce TEE based Trusted Keys support

On Thu, 2019-08-01 at 09:36 +0300, Janne Karhunen wrote:
> On Wed, Jul 31, 2019 at 5:23 PM Sumit Garg <sumit.garg@...aro.org>
> wrote:
> 
> > > I guess my wording was wrong, tried to say that physical TEEs in
> > > the
> > > wild vary massively hardware wise. Generalizing these things is
> > > rough.
> > > 
> > 
> > There are already well defined GlobalPlatform Standards to
> > generalize
> > the TEE interface. One of them is GlobalPlatform TEE Client API [1]
> > which provides the basis for this TEE interface.
> 
> I'm aware of it - I have implemented a large part of the GP TEE APIs
> earlier (primarily the crypto functions). Does the TEE you work with
> actually support GP properly? Can I take a look at the code?

AFAIK Sumit is working with the OP-TEE implementation, which can be
found on github: https://github.com/op-tee/optee_os

Regards,
Rouven