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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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14
drivers/cpufreq/acpi-cpufreq.c
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@@ -126,12 +126,12 @@ static void boost_set_msr_each(void *p_en)
boost_set_msr(enable);
}
static int set_boost(int val)
static int set_boost(struct cpufreq_policy *policy, int val)
{
get_online_cpus();
on_each_cpu(boost_set_msr_each, (void *)(long)val, 1);
put_online_cpus();
pr_debug("Core Boosting %sabled.\n", val ? "en" : "dis");
on_each_cpu_mask(policy->cpus, boost_set_msr_each,
(void *)(long)val, 1);
pr_debug("CPU %*pbl: Core Boosting %sabled.\n",
cpumask_pr_args(policy->cpus), val ? "en" : "dis");
return 0;
}
@@ -162,7 +162,9 @@ static ssize_t store_cpb(struct cpufreq_policy *policy, const char *buf,
if (ret || val > 1)
return -EINVAL;
set_boost(val);
get_online_cpus();
set_boost(policy, val);
put_online_cpus();
return count;
}