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author | Ulf Hansson <ulf.hansson@linaro.org> | 2019-03-27 15:35:46 +0100 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-04-10 00:32:34 +0200 |
commit | eb594b7325f61835555140922a4cb715264a325c (patch) | |
tree | 4dabc8d09d647ceaf08d084137f586b1d2140a72 /kernel/time | |
parent | 49a27e279052cf71ba931a26b00194ff46510480 (diff) | |
download | linux-stable-eb594b7325f61835555140922a4cb715264a325c.tar.gz linux-stable-eb594b7325f61835555140922a4cb715264a325c.tar.bz2 linux-stable-eb594b7325f61835555140922a4cb715264a325c.zip |
PM / Domains: Add support for CPU devices to genpd
To enable a CPU device to be attached to a PM domain managed by genpd,
make a few changes to it for convenience.
To be able to quickly find out what CPUs are attached to a genpd,
which typically becomes useful from a genpd governor as subsequent
changes are about to show, add a cpumask to struct generic_pm_domain
to be updated when a CPU device gets attached to the genpd containing
that cpumask. Also, propagate the cpumask changes upwards in the
domain hierarchy to the master PM domains. This way, the cpumask for
a genpd hierarchically reflects all CPUs attached to the topology
below it.
Finally, make this an opt-in feature, to avoid having to manage CPUs
and the cpumask for a genpd that don't need it. To that end, add
a new genpd configuration bit, GENPD_FLAG_CPU_DOMAIN.
Co-developed-by: Lina Iyer <lina.iyer@linaro.org>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/time')
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