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Subject: Re: [PATCH v4] Add virtio SCMI device specification

On 24.04.20 10:51, Peter Hilber wrote:
> This patch proposes a new virtio device for the Arm SCMI protocol.
> The device provides a simple transport for the Arm SCMI protocol[1]. The
> *S*ystem *C*ontrol and *M*anagement *I*nterface protocol allows speaking
> to system controllers that allow orchestrating things like power
> management, system state management and sensor access. The SCMI protocol
> is used on SoCs where multiple cores and co-processors need access to
> these resources.
> The virtio transport allows making use of this protocol in virtualized
> systems.
> [1] https://developer.arm.com/docs/den0056/b
> Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com>
> ---
> Notes:
>     Changes for v4:
>     - Add more requirements on shared memory regions after feedback from
>       Alex BennÃe.

I had an off-list discussion about concurrent access to SCMI shared
memory regions with the Arm SCMI spec[1] maintainer yesterday. An
upcoming new version of the Arm SCMI spec will provide a generic, more
powerful way to handle concurrent access to shared memory.

Therefore, I plan to again drop the requirements introduced in v4 in the
upcoming virtio SCMI spec patch v5.

Best regards,


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