Question on "arm64: mm: Prototype to allow drivers to request PBHA values"

[mawupeng]

Hi James Morse,

Thanks for your work on working out what linux needs to support to make use of
existing SoCs using PBHA[1]. In your example, PBHA can be use memory
compression or system-cache.

This patch set is perfect and covers a wide range of scenarios. What's you
follow-up plan for this patch set?

In this patch set, devicetree is using to pass the pbha-performance-only
and pbha-no-aliases attributes to the OS. Since ACPI may be used to do
such work and there is no suitable acpi table to represent these
attributes at early acpi parse stage.

Do you have any idea on how to pass these pbha related attributes via
ACPI?

[1]: https://lore.kernel.org/all/20211015161416.2196-1-james.morse@arm.com/t/#u