Re: [PATCH 00/18] ARM/ARM64: Support hierarchical CPU arrangement for PSCI

[Ulf Hansson]

Sudeep, Lorenzo, Mark,

On Mon, 13 May 2019 at 21:23, Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote:
>
> This series enables support for hierarchical CPU arrangement, managed by PSCI
> for ARM/ARM64. It's based on using the generic PM domain (genpd), which
> recently was extended to manage devices belonging to CPUs.
>
> The last two DTS patches enables the hierarchical topology to be used for the
> Qcom 410c Dragonboard and the Hisilicon Hikey board. The former uses PSCI OS-
> initiated mode, while the latter uses the PSCI Platform-Coordinated mode. In
> other words, the hierarchical description of the topology in DT, is orthogonal
> to the supported PSCI CPU suspend mode.
>
> Do note, these patches have been posted earlier, but then being part of bigger
> series, which at that point also included the needed infrastructure changes to
> genpd and cpuidle. Rather than continue to carry the old version history,
> which may be a bit confusing, I decided to start over. Although, for clarity,
> the changelog below explains what changes that have been made since the last
> submission was made.

Is there anything I can do to help the review to get going here?

FYI, I hosted a talk about "cluster idle" at OSPM in Pisa a few weeks
ago. There is a couple of slides [1] with flowcharts of how it works,
that may be of interest for you.

Kind regards
Uffe

[...]

[1]
http://retis.sssup.it/ospm-summit/Downloads/01_02-ClusterIdle_UlfHansson.pdf