Re: [PATCH 0/5] RISC-V: Add cpu-map topology information nodes

[Sudeep Holla]

On Tue, Jul 05, 2022 at 08:04:31PM +0100, Conor Dooley wrote:
> From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
> 
> It was reported to me that the Hive Unmatched incorrectly reports
> its topology to hwloc, but the StarFive VisionFive did in [0] &
> a subsequent off-list email from Brice (the hwloc maintainer).
> This turned out not to be entirely true, the /downstream/ version
> of the VisionFive does work correctly but not upstream, as the
> downstream devicetree has a cpu-map node that was added recently.
> 
> This series adds a cpu-map node to all upstream devicetrees, which
> I have tested on mpfs & fu540. The first patch is lifted directly
> from the downstream StarFive devicetree.
> 

Reviewed-by: Sudeep Holla <sudeep.holla@xxxxxxx>

I would recommend to have sane defaults in core risc-v code in case of
absence of /cpu-map node as it is optional. The reason I mentioned is that
Conor mentioned how the default values in absence of the node looked quite
wrong. I don't know if it is possible on RISC-V but on ARM64 we do have
default values if arch_topology fails to set based on DT/ACPI.

-- 
Regards,
Sudeep