From: Janne Karhunen <janne.karhunen@gmail.com>
To: Sumit Garg <sumit.garg@linaro.org>
Cc: keyrings@vger.kernel.org, linux-integrity@vger.kernel.org,
linux-security-module@vger.kernel.org,
Jens Wiklander <jens.wiklander@linaro.org>,
Jonathan Corbet <corbet@lwn.net>,
dhowells@redhat.com, jejb@linux.ibm.com,
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
Mimi Zohar <zohar@linux.ibm.com>,
James Morris <jmorris@namei.org>,
"Serge E. Hallyn" <serge@hallyn.com>,
Casey Schaufler <casey@schaufler-ca.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Daniel Thompson <daniel.thompson@linaro.org>,
Linux Doc Mailing List <linux-doc@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
"tee-dev @ lists . linaro . org" <tee-dev@lists.linaro.org>
Subject: Re: [RFC v2 0/6] Introduce TEE based Trusted Keys support
Date: Wed, 31 Jul 2019 14:02:53 +0300 [thread overview]
Message-ID: <CAE=Ncrb23q++z8R8UMbjDE2epEq4YVcNGzrRD31eH3JAooYejg@mail.gmail.com> (raw)
In-Reply-To: <CAFA6WYPJAzbPdcpBqioxjY=T8RLw-73B_hpzX4cGnwVvm5zpJw@mail.gmail.com>
On Wed, Jul 31, 2019 at 1:26 PM Sumit Garg <sumit.garg@linaro.org> wrote:
> > Interesting, I wrote something similar and posted it to the lists a while back:
> > https://github.com/jkrh/linux/commit/d77ea03afedcb5fd42234cd834da8f8a0809f6a6
> >
> > Since there are no generic 'TEEs' available,
>
> There is already a generic TEE interface driver available in kernel.
> Have a look here: "Documentation/tee.txt".
I guess my wording was wrong, tried to say that physical TEEs in the
wild vary massively hardware wise. Generalizing these things is rough.
> > I implemented the same
> > thing as a generic protocol translator. The shared memory binding for
> > instance already assumes fair amount about the TEE and how that is
> > physically present in the system. Besides, the help from usage of shm
> > is pretty limited due to the size of the keydata.
> >
>
> If you look at patch #1 and #2, they add support to register kernel
> memory buffer (keydata buffer in this case) with TEE to operate on. So
> there isn't any limitation due to the size of the keydata.
Ah, didn't mean that. Meant that the keydata is typically pretty small
in size, so there is limited benefit from passing that in via shm if
that complicates anything.
--
Janne
next prev parent reply other threads:[~2019-07-31 11:03 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-30 12:23 [RFC v2 0/6] Introduce TEE based Trusted Keys support Sumit Garg
2019-07-30 12:23 ` [RFC v2 1/6] tee: optee: allow kernel pages to register as shm Sumit Garg
2019-07-30 12:23 ` [RFC v2 2/6] tee: enable support to register kernel memory Sumit Garg
2019-08-08 22:26 ` [Tee-dev] " Stuart Yoder
2019-08-09 5:36 ` Sumit Garg
2019-07-30 12:23 ` [RFC v2 3/6] tee: add private login method for kernel clients Sumit Garg
2019-07-30 12:23 ` [RFC v2 4/6] KEYS: trusted: Introduce TEE based Trusted Keys Sumit Garg
2019-07-30 12:23 ` [RFC v2 5/6] doc: keys: Document usage of " Sumit Garg
2019-07-30 12:23 ` [RFC v2 6/6] MAINTAINERS: Add entry for " Sumit Garg
2019-07-31 7:11 ` [RFC v2 0/6] Introduce TEE based Trusted Keys support Janne Karhunen
2019-07-31 10:21 ` Janne Karhunen
2019-07-31 13:58 ` Sumit Garg
2019-08-01 6:21 ` Janne Karhunen
2019-08-01 7:40 ` Sumit Garg
2019-08-01 7:59 ` Janne Karhunen
2019-08-01 10:00 ` Sumit Garg
2019-08-01 10:40 ` Janne Karhunen
2019-07-31 10:26 ` Sumit Garg
2019-07-31 11:02 ` Janne Karhunen [this message]
2019-07-31 14:23 ` Sumit Garg
2019-08-01 6:36 ` Janne Karhunen
2019-08-01 6:50 ` [Tee-dev] " Rouven Czerwinski
2019-08-01 7:30 ` Janne Karhunen
2019-08-01 7:58 ` Sumit Garg
2019-08-01 8:30 ` Janne Karhunen
2019-08-01 10:27 ` Sumit Garg
2019-08-04 20:48 ` Jarkko Sakkinen
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