From: Sudeep Holla <sudeep.holla@arm.com>
To: Sumit Garg <sumit.garg@linaro.org>
Cc: linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
Devicetree List <devicetree@vger.kernel.org>,
Trilok Soni <tsoni@codeaurora.org>,
arve@android.com, Andrew Walbran <qwandor@google.com>,
David Hartley <dhh@qti.qualcomm.com>,
Achin Gupta <Achin.Gupta@arm.com>,
Jens Wiklander <jens.wiklander@linaro.org>,
Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>,
Marc Bonnici <marc.bonnici@arm.com>
Subject: Re: [PATCH v5 1/7] dt-bindings: Arm: Add Firmware Framework for Armv8-A (FF-A) binding
Date: Fri, 26 Mar 2021 10:55:45 +0000 [thread overview]
Message-ID: <20210326105545.44rdcbrumg3q6i7y@bogus> (raw)
In-Reply-To: <CAFA6WYMrCzDUHn4O=tM7y+w01LcSPrRu3Awja7io1XtcZPhqYQ@mail.gmail.com>
On Fri, Mar 26, 2021 at 10:35:23AM +0530, Sumit Garg wrote:
> Hi Sudeep,
>
> Apologies for catching up late on this patch-set.
>
> On Thu, 25 Mar 2021 at 20:05, Sudeep Holla <sudeep.holla@arm.com> wrote:
> >
> > Since the FF-A v1.0 specification doesn't list the UUID of all the
> > partitions in the discovery API, we need to specify the UUID of the
> > partitions that need to be accessed by drivers within the kernel.
> >
>
> Wouldn't we be able to implement auto-discovery of ffa partitions? I
> think enumeration of ffa partitions on FFA bus should be quite similar
> to enumeration of TAs on TEE bus (see [1]). Otherwise we need to put
> these redundant DT entries for every ffa partition which IMHO would
> bloat up device trees for every platform.
>
Any suggestions on how to ? Clearly spec doesn't have that provision, I
had raised this point in the past. Jens has similar concern and he did
ask the same[1]. As I replied to him in that thread[2].
I am open to suggestion on how to auto-discover, currently as I see spec
doesn't support it.
--
Regards,
Sudeep
[1] https://lore.kernel.org/linux-arm-kernel/20201216134659.GA4146223@jade/
[2] https://lore.kernel.org/linux-arm-kernel/20210113092236.pnabzaufzuzwprmw@bogus/
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next prev parent reply other threads:[~2021-03-26 10:57 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-25 14:32 [PATCH v5 0/7] firmware: Add initial support for Arm FF-A Sudeep Holla
2021-03-25 14:32 ` [PATCH v5 1/7] dt-bindings: Arm: Add Firmware Framework for Armv8-A (FF-A) binding Sudeep Holla
2021-03-26 5:05 ` Sumit Garg
2021-03-26 10:55 ` Sudeep Holla [this message]
2021-03-26 11:56 ` Sumit Garg
2021-03-30 15:03 ` Rob Herring
2021-04-06 15:08 ` Achin Gupta
2021-03-25 14:32 ` [PATCH v5 2/7] arm64: smccc: Add support for SMCCCv1.2 input/output registers Sudeep Holla
2021-03-25 14:41 ` Mark Rutland
2021-03-26 12:18 ` Mark Rutland
2021-03-26 12:51 ` Sudeep Holla
2021-04-01 15:50 ` Michael Kelley
2021-03-25 14:32 ` [PATCH v5 3/7] firmware: arm_ffa: Add initial FFA bus support for device enumeration Sudeep Holla
2021-03-25 14:32 ` [PATCH v5 4/7] firmware: arm_ffa: Add initial Arm FFA driver support Sudeep Holla
2021-03-25 14:32 ` [PATCH v5 5/7] firmware: arm_ffa: Add support for SMCCC as transport to FFA driver Sudeep Holla
2021-03-25 14:32 ` [PATCH v5 6/7] firmware: arm_ffa: Setup in-kernel users of FFA partitions Sudeep Holla
2021-04-09 15:45 ` Marc Bonnici
2021-03-25 14:32 ` [PATCH v5 7/7] firmware: arm_ffa: Add support for MEM_* interfaces Sudeep Holla
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