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cpufreq: change '.set_boost' to act on one policy

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Macro 'for_each_active_policy()' is defined internally. To avoid some
cpufreq driver needing this macro to iterate over all the policies in
'.set_boost' callback, we redefine '.set_boost' to act on only one
policy and pass the policy as an argument.

'cpufreq_boost_trigger_state()' iterates over all the policies to set
boost for the system.

This is preparation for adding SW BOOST support for CPPC.

To protect Boost enable/disable by sysfs from CPU online/offline,
add 'cpu_hotplug_lock' before calling '.set_boost' for each CPU.

Also move the lock from 'set_boost()' to 'store_cpb()' in
acpi_cpufreq.

Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Suggested-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
[ rjw: Subject & changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Xiongfeng Wang
2020-05-30 10:08:30 +08:00
committed by Rafael J. Wysocki
parent 73e5f9c0d3
commit cf6fada715
3 changed files with 40 additions and 33 deletions
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include/linux/cpufreq.h
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@@ -367,7 +367,7 @@ struct cpufreq_driver {
/* platform specific boost support code */
bool boost_enabled;
int (*set_boost)(int state);
int (*set_boost)(struct cpufreq_policy *policy, int state);
};
/* flags */