Re: [PATCH v2] xen/arm: Skip Xen specific nodes/properties from hwdom /chosen node

[Julien Grall <julien@xxxxxxx>]

Hi Michal,

On 12/09/2023 11:53, Michal Orzel wrote:
> Skip the following Xen specific host device tree nodes/properties
> from being included into hardware domain /chosen node:
>   - xen,static-heap: this property informs Xen about memory regions
>     reserved exclusively as static heap,
>   - xen,domain-shared-memory-v1: node with this compatible informs Xen
>     about static shared memory region for a domain. Xen exposes a different
>     node (under /reserved-memory with compatible "xen,shared-memory-v1") to
>     let domain know about the shared region,
>   - xen,evtchn-v1: node with this compatible informs Xen about static
>     event channel configuration for a domain. Xen does not expose
>     information about static event channels to domUs and dom0 case was
>     overlooked (by default nodes from host dt are copied to dom0 fdt unless
>     explicitly marked to be skipped), since the author's idea was not to
>     expose it (refer docs/misc/arm/device-tree/booting.txt, "Static Event
>     Channel"). Even if we wanted to expose the static event channel
>     information, the current node is in the wrong format (i.e. contains
>     phandle to domU node not visible by dom0). Lastly, this feature is
>     marked as tech-preview and there is no Linux dt binding in place.
>
> Signed-off-by: Michal Orzel <michal.orzel@xxxxxxx>
Acked-by: Julien Grall <jgrall@xxxxxxxxxx>

Cheers,

--
Julien Grall