linux-kernel - Re: [PATCH v3 1/5] tee: add sec_world_id to struct tee

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Date:   Wed, 28 Jul 2021 14:11:37 +0530
From:   Sumit Garg <sumit.garg@...aro.org>
To:     Jens Wiklander <jens.wiklander@...aro.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        OP-TEE TrustedFirmware <op-tee@...ts.trustedfirmware.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Marc Bonnici <marc.bonnici@....com>,
        Jerome Forissier <jerome@...issier.org>,
        Sughosh Ganu <sughosh.ganu@...aro.org>
Subject: Re: [PATCH v3 1/5] tee: add sec_world_id to struct tee_shm

On Thu, 22 Jul 2021 at 17:48, Jens Wiklander <jens.wiklander@...aro.org> wrote:
>
> Adds sec_world_id to struct tee_shm which describes a shared memory
> object. sec_world_id can be used by a driver to store an id assigned by
> secure world.
>
> Signed-off-by: Jens Wiklander <jens.wiklander@...aro.org>
> ---
>  include/linux/tee_drv.h | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>

Reviewed-by: Sumit Garg <sumit.garg@...aro.org>

-Sumit

> diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h
> index 54269e47ac9a..1a29f0e66e13 100644
> --- a/include/linux/tee_drv.h
> +++ b/include/linux/tee_drv.h
> @@ -196,7 +196,11 @@ int tee_session_calc_client_uuid(uuid_t *uuid, u32 connection_method,
>   * @num_pages: number of locked pages
>   * @dmabuf:    dmabuf used to for exporting to user space
>   * @flags:     defined by TEE_SHM_* in tee_drv.h
> - * @id:                unique id of a shared memory object on this device
> + * @id:                unique id of a shared memory object on this device, shared
> + *             with user space
> + * @sec_world_id:
> + *             secure world assigned id of this shared memory object, not
> + *             used by all drivers
>   *
>   * This pool is only supposed to be accessed directly from the TEE
>   * subsystem and from drivers that implements their own shm pool manager.
> @@ -212,6 +216,7 @@ struct tee_shm {
>         struct dma_buf *dmabuf;
>         u32 flags;
>         int id;
> +       u64 sec_world_id;
>  };
>
>  /**
> --
> 2.31.1
>