linux-kernel - Re: [PATCHv8 1/3] optee: use uuid for sysfs driver entry

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Message-ID: <CAD8XO3Y2b5SDfyjUtQWA+nVSSTUABZX603UZynxbgztTcN-9iw@mail.gmail.com>
Date:   Wed, 17 Jun 2020 09:45:41 +0300
From:   Maxim Uvarov <maxim.uvarov@...aro.org>
To:     Sumit Garg <sumit.garg@...aro.org>
Cc:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "tee-dev @ lists . linaro . org" <tee-dev@...ts.linaro.org>,
        peterhuewe@....de, Jason Gunthorpe <jgg@...pe.ca>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jens Wiklander <jens.wiklander@...aro.org>,
        linux-integrity@...r.kernel.org, Arnd Bergmann <arnd@...aro.org>
Subject: Re: [PATCHv8 1/3] optee: use uuid for sysfs driver entry

On Wed, 17 Jun 2020 at 09:07, Sumit Garg <sumit.garg@...aro.org> wrote:
>
> On Wed, 17 Jun 2020 at 02:20, Jarkko Sakkinen
> <jarkko.sakkinen@...ux.intel.com> wrote:
> >
> > On Thu, Jun 04, 2020 at 08:58:49PM +0300, Maxim Uvarov wrote:
> > > With the evolving use-cases for TEE bus, now it's required to support
> > > multi-stage enumeration process. But using a simple index doesn't
> > > suffice this requirement and instead leads to duplicate sysfs entries.
> > > So instead switch to use more informative device UUID for sysfs entry
> > > like:
> > > /sys/bus/tee/devices/optee-ta-<uuid>
> > >
> > > Signed-off-by: Maxim Uvarov <maxim.uvarov@...aro.org>
> > > Reviewed-by: Sumit Garg <sumit.garg@...aro.org>
> >
> > Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> >
> > Sumit, are you able to test these easily?
>
> Yes, I could give them a try.
>
> Maxim,
>
> Could you share fTPM TA tree which I should use for testing?
>
> -Sumit

Yes, I will send you an email.

>
> >
> > /Jarkko