On 27/02/2019 20:58, Ulf Hansson wrote:

To enable a device belonging to a CPU to be attached to a PM domain managed
by genpd, let's do a few changes to it, as to make it convenient to manage
the specifics around CPUs.

To be able to quickly find out what CPUs that are attached to a genpd,
which typically becomes useful from a genpd governor as following changes
is about to show, let's add a cpumask to the struct generic_pm_domain. At
the point when a CPU device gets attached to a genpd, let's update the
genpd's cpumask. Moreover, let's also propagate changes to the cpumask
upwards in the topology to the master PM domains. In this way, the cpumask
for a genpd hierarchically reflects all CPUs attached to the topology below
it.

Finally, let's make this an opt-in feature, to avoid having to manage CPUs
and the cpumask for a genpd that doesn't need it. For that reason, let's
add a new genpd configuration bit, GENPD_FLAG_CPU_DOMAIN.

Cc: Lina Iyer <redacted>
Co-developed-by: Lina Iyer <redacted>
Acked-by: Rafael J. Wysocki <redacted>
Signed-off-by: Ulf Hansson <redacted>

Acked-by: Daniel Lezcano <redacted>

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