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From:   Jens Wiklander <jens.wiklander@linaro.org>
Date:   Fri, 21 Aug 2020 12:09:22 +0200
Message-ID: <CAHUa44GKffKTBdrfchtj=wuM_4EMcFPw35DyXT7pRuqDYQ6VYA@mail.gmail.com>
Subject: Re: [PATCH] driver: tee: Handle NULL pointer indication from client
To:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        op-tee@lists.trustedfirmware.org
Cc:     Cedric Neveux <cedric.neveux@nxp.com>,
        Michael Whitfield <michael.whitfield@nxp.com>,
        Joakim Bech <joakim.bech@linaro.org>,
        Jerome Forissier <jerome@forissier.org>
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On Fri, Jul 10, 2020 at 12:18 PM Jens Wiklander
<jens.wiklander@linaro.org> wrote:
>
> From: Cedric Neveux <cedric.neveux@nxp.com>
>
> TEE Client introduce a new capability "TEE_GEN_CAP_MEMREF_NULL"
> to handle the support of the shared memory buffer with a NULL pointer.
>
> This capability depends on TEE Capabilities and driver support.
> Driver and TEE exchange capabilities at driver initialization.
>
> Signed-off-by: Michael Whitfield <michael.whitfield@nxp.com>
> Signed-off-by: Cedric Neveux <cedric.neveux@nxp.com>
> Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
> Tested-by: Joakim Bech <joakim.bech@linaro.org> (QEMU)
> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
> ---
>  drivers/tee/optee/core.c      |  7 +++++
>  drivers/tee/optee/optee_smc.h |  3 +++
>  drivers/tee/tee_core.c        | 49 ++++++++++++++++++++++-------------
>  include/linux/tee_drv.h       |  3 +++
>  include/uapi/linux/tee.h      | 13 ++++++++++
>  5 files changed, 57 insertions(+), 18 deletions(-)

I almost forgot this one. I'm picking this up.

Cheers,
Jens