Re: [RFC PATCH 1/3] dt-bindings: Add ARM PSA FF binding for non-secure VM partitions

Hi Will,

On 10 Jun 2020, at 08:43, Will Deacon [off-list ref] wrote:

On Tue, Jun 09, 2020 at 04:35:51PM -0600, Rob Herring wrote:

quoted

On Mon, Jun 01, 2020 at 10:45:10AM +0100, Sudeep Holla wrote:

quoted

Add devicetree bindings for a Arm PSA FF-A compliant non-secure partition
at virtual interface(VMs).

Signed-off-by: Sudeep Holla <redacted>
---
.../devicetree/bindings/arm/arm,psa-ffa.txt   | 47 +++++++++++++++++++
1 file changed, 47 insertions(+)
create mode 100644 Documentation/devicetree/bindings/arm/arm,psa-ffa.txt

I'm hoping this goes away if the firmware is discoverable, but if not DT 
bindings are DT schema now.

We'll need the binding for the kvm host side, because there are plenty
of partition properties that are not discoverable (e.g. number of vCPUs).

Just trying to understand the req. a bit better…

The FF-A driver in the host can use FFA_PARTITION_INFO_GET to determine the count of partitions and their vCPUs.

Is this about a guest being able to find out how many vCPUs it has? 

Cheers,
Achin

I'll have a go a yamlifying what I have...

Will

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