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Date:   Thu, 22 Jun 2023 16:56:53 +0200
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Subject: Re: [PATCH v6 0/4] introduce tee-based EFI Runtime Variable Service
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To:     Masahisa Kojima <masahisa.kojima@linaro.org>,
        Ard Biesheuvel <ardb@kernel.org>,
        Jens Wiklander <jens.wiklander@linaro.org>,
        Sumit Garg <sumit.garg@linaro.org>,
        linux-kernel@vger.kernel.org, op-tee@lists.trustedfirmware.org
Cc:     Ilias Apalodimas <ilias.apalodimas@linaro.org>,
        Johan Hovold <johan+linaro@kernel.org>
References: <20230622085112.1521-1-masahisa.kojima@linaro.org>
From:   Jan Kiszka <jan.kiszka@siemens.com>
In-Reply-To: <20230622085112.1521-1-masahisa.kojima@linaro.org>
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On 22.06.23 10:51, Masahisa Kojima wrote:
> This series introduces the tee based EFI Runtime Variable Service.
> 
> The eMMC device is typically owned by the non-secure world(linux in
> this case). There is an existing solution utilizing eMMC RPMB partition
> for EFI Variables, it is implemented by interacting with
> OP-TEE, StandaloneMM(as EFI Variable Service Pseudo TA), eMMC driver
> and tee-supplicant. The last piece is the tee-based variable access
> driver to interact with OP-TEE and StandaloneMM.
> 
> Changelog:
> v5 -> v6
> - new patch #4 is added in this series, #1-#3 patches are unchanged.
>   automatically update super block flag when the efivarops support
>   SetVariable runtime service, so that user does not need to manually
>   remount the efivarfs as RW.

But that is not yet resolving the architectural problem with that
userspace daemon dependency. What are the next steps for that now?

Thanks,
Jan

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Competence Center Embedded Linux