linux-kernel - Re: [PATCH v8 2/4] KEYS: trusted: Introduce TEE based Trusted Keys

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Date:   Wed, 13 Jan 2021 16:47:00 +0530
From:   Sumit Garg <sumit.garg@...aro.org>
To:     Jarkko Sakkinen <jarkko@...nel.org>
Cc:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        James Bottomley <jejb@...ux.ibm.com>,
        David Howells <dhowells@...hat.com>,
        Jens Wiklander <jens.wiklander@...aro.org>,
        Jonathan Corbet <corbet@....net>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Casey Schaufler <casey@...aufler-ca.com>,
        Janne Karhunen <janne.karhunen@...il.com>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Markus Wamser <Markus.Wamser@...ed-mode.de>,
        Luke Hinds <lhinds@...hat.com>,
        "open list:ASYMMETRIC KEYS" <keyrings@...r.kernel.org>,
        linux-integrity@...r.kernel.org,
        "open list:SECURITY SUBSYSTEM" 
        <linux-security-module@...r.kernel.org>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        op-tee@...ts.trustedfirmware.org
Subject: Re: [PATCH v8 2/4] KEYS: trusted: Introduce TEE based Trusted Keys

Hi Jarkko,

On Mon, 11 Jan 2021 at 22:05, Jarkko Sakkinen <jarkko@...nel.org> wrote:
>
> On Tue, Nov 03, 2020 at 09:31:44PM +0530, Sumit Garg wrote:
> > Add support for TEE based trusted keys where TEE provides the functionality
> > to seal and unseal trusted keys using hardware unique key.
> >
> > Refer to Documentation/tee.txt for detailed information about TEE.
> >
> > Signed-off-by: Sumit Garg <sumit.garg@...aro.org>
>
> I haven't yet got QEMU environment working with aarch64, this produces
> just a blank screen:
>
> ./output/host/usr/bin/qemu-system-aarch64 -M virt -cpu cortex-a53 -smp 1 -kernel output/images/Image -initrd output/images/rootfs.cpio -serial stdio
>
> My BuildRoot fork for TPM and keyring testing is located over here:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/jarkko/buildroot-tpmdd.git/
>
> The "ARM version" is at this point in aarch64 branch. Over time I will
> define tpmdd-x86_64 and tpmdd-aarch64 boards and everything will be then
> in the master branch.
>
> To create identical images you just need to
>
> $ make tpmdd_defconfig && make
>
> Can you check if you see anything obviously wrong? I'm eager to test this
> patch set, and in bigger picture I really need to have ready to run
> aarch64 environment available.

I would rather suggest you to follow steps listed here [1] as to test
this feature on Qemu aarch64 we need to build firmwares such as TF-A,
OP-TEE, UEFI etc. which are all integrated into OP-TEE Qemu build
system [2]. And then it would be easier to migrate them to your
buildroot environment as well.

[1] https://lists.trustedfirmware.org/pipermail/op-tee/2020-May/000027.html
[2] https://optee.readthedocs.io/en/latest/building/devices/qemu.html#qemu-v8

-Sumit

>
> /Jarkko