linux-kernel - Re: [PATCH v4 06/16] firmware: arm_scmi, smccc, mailbox: Make shmem based transports optional

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Message-ID: <20210701102725.GC17807@e120937-lin>
Date:   Thu, 1 Jul 2021 11:27:25 +0100
From:   Cristian Marussi <cristian.marussi@....com>
To:     Peter Hilber <peter.hilber@...nsynergy.com>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        virtualization@...ts.linux-foundation.org,
        virtio-dev@...ts.oasis-open.org, sudeep.holla@....com,
        james.quinlan@...adcom.com, Jonathan.Cameron@...wei.com,
        f.fainelli@...il.com, etienne.carriere@...aro.org,
        vincent.guittot@...aro.org, souvik.chakravarty@....com,
        igor.skalkin@...nsynergy.com, alex.bennee@...aro.org,
        jean-philippe@...aro.org, mikhail.golubev@...nsynergy.com,
        anton.yakovlev@...nsynergy.com, Vasyl.Vavrychuk@...nsynergy.com,
        Andriy.Tryshnivskyy@...nsynergy.com
Subject: Re: [PATCH v4 06/16] firmware: arm_scmi, smccc, mailbox: Make shmem
 based transports optional

Hi,

On Thu, Jul 01, 2021 at 10:42:56AM +0200, Peter Hilber wrote:
> On 11.06.21 18:59, Cristian Marussi wrote:
> > From: Igor Skalkin <igor.skalkin@...nsynergy.com>
> > 
> > Upon adding the virtio transport in this patch series, SCMI will also
> > work without shared memory based transports. Also, the mailbox transport
> > may not be needed if the smc transport is used.
> > 
> > - Compile shmem.c only if a shmem based transport is available.
> > 
> > - Remove hard dependency of SCMI on mailbox.
> 
> The hard dependency has now already been removed with
> 
>   c05b07963e96 ("firmware: arm_scmi: Add SMCCC discovery dependency in")
> 

I deeply reviewed transport Kconfig approach in V5 in general, making
all transport configurable (y/n), so this patch will be adapted to the new
Kconfig layout annd basically just provide the HAVE_SHMEM feature.

Thanks,
Cristian