linux-kernel - Re: [PATCH] tee: ACPI support for optee driver

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Message-ID: <CAL-zptMBRAM1-fWVv0u_YP7bhzagDPGOZPNWw5BJmfMdzhutjw@mail.gmail.com>
Date:   Thu, 21 Sep 2017 13:26:25 +0530
From:   Mayuresh Chitale <mchitale@....com>
To:     Hanjun Guo <guohanjun@...wei.com>
Cc:     linux-kernel@...r.kernel.org,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>, linux-acpi@...r.kernel.org,
        Jens Wiklander <jens.wiklander@...aro.org>,
        "patches@....com" <patches@....com>
Subject: Re: [PATCH] tee: ACPI support for optee driver

On Thu, Sep 21, 2017 at 1:15 PM, Hanjun Guo <guohanjun@...wei.com> wrote:
> On 2017/9/21 15:12, Mayuresh Chitale wrote:
>> This patch modifies the optee driver to add support for parsing
>> the conduit method from an ACPI node.
>
> Sorry I didn't involve this earlier, but I think this is a wrong
> approach, in ACPI 5.1+ spec, there is a bit in FADT table which
> indicates PSCI using SMC or HVC, please see ACPI 6.2 [1],
> Table 5-37 Fixed ACPI Description Table ARM Boot Architecture Flags.
>
> Can we just use that to get the conduit method for optee driver too?
Thanks for the comment. I will check it out.
>
> [1]: http://www.uefi.org/sites/default/files/resources/ACPI_6_2.pdf
>
> Thanks
> Hanjun
>
>
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