static int boost_notify(struct notifier_block *nb, unsigned long action,
void *hcpu)
{
unsigned cpu = (long)hcpu;
const struct cpumask *cpumask;
cpumask = get_cpu_mask(cpu);
/*
* Clear the boost-disable bit on the CPU_DOWN path so that
* this cpu cannot block the remaining ones from boosting. On
* the CPU_UP path we simply keep the boost-disable flag in
* sync with the current global state.
*/
switch (action) {
case CPU_UP_PREPARE:
case CPU_UP_PREPARE_FROZEN:
boost_set_msrs(acpi_cpufreq_driver.boost_enabled, cpumask);
break;
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:
boost_set_msrs(1, cpumask);
break;
default:
break;
}
return NOTIFY_OK;
}
static int _store_boost(int val)
{
get_online_cpus();
boost_set_msrs(val, cpu_online_mask);
put_online_cpus();
pr_debug("Core Boosting %sabled.\n", val ? "en" : "dis");
return 0;
}
static void __init acpi_cpufreq_boost_init(void)
{
if (boot_cpu_has(X86_FEATURE_CPB) || boot_cpu_has(X86_FEATURE_IDA)) {
msrs = msrs_alloc();
if (!msrs)
return;
acpi_cpufreq_driver.boost_supported = true;
acpi_cpufreq_driver.boost_enabled = boost_state(0);
get_online_cpus();
/* Force all MSRs to the same value */
boost_set_msrs(acpi_cpufreq_driver.boost_enabled,
cpu_online_mask);
register_cpu_notifier(&boost_nb);
put_online_cpus();
}
}
static void __init acpi_cpufreq_boost_init(void)
{
if (boot_cpu_has(X86_FEATURE_CPB) || boot_cpu_has(X86_FEATURE_IDA)) {
msrs = msrs_alloc();
if (!msrs)
return;
pax_open_kernel();
*(bool *)&acpi_cpufreq_driver.boost_supported = true;
*(bool *)&acpi_cpufreq_driver.boost_enabled = boost_state(0);
pax_close_kernel();
cpu_notifier_register_begin();
/* Force all MSRs to the same value */
boost_set_msrs(acpi_cpufreq_driver.boost_enabled,
cpu_online_mask);
__register_cpu_notifier(&boost_nb);
cpu_notifier_register_done();
}
}