This code is convoluted and because it can be invoked post init via the
ACPI/CPPC code, all of the initialization functionality is built in instead
of being part of init text and init data.
As a first step create separate calls for the boot and the application
processors.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Link: https://lore.kernel.org/r/20220415161206.536733494@linutronix.de
#define arch_scale_freq_tick arch_scale_freq_tick
extern void arch_set_max_freq_ratio(bool turbo_disabled);
-void init_freq_invariance(bool secondary, bool cppc_ready);
+extern void bp_init_freq_invariance(bool cppc_ready);
+extern void ap_init_freq_invariance(void);
#else
-static inline void arch_set_max_freq_ratio(bool turbo_disabled)
-{
-}
-static inline void init_freq_invariance(bool secondary, bool cppc_ready)
-{
-}
+static inline void arch_set_max_freq_ratio(bool turbo_disabled) { }
+static inline void bp_init_freq_invariance(bool cppc_ready) { }
+static inline void ap_init_freq_invariance(void) { }
#endif
#ifdef CONFIG_ACPI_CPPC_LIB
mutex_lock(&freq_invariance_lock);
- init_freq_invariance(secondary, true);
+ if (!secondary)
+ bp_init_freq_invariance(true);
secondary = true;
mutex_unlock(&freq_invariance_lock);
static inline void register_freq_invariance_syscore_ops(void) {}
#endif
-void init_freq_invariance(bool secondary, bool cppc_ready)
+void bp_init_freq_invariance(bool cppc_ready)
{
- bool ret = false;
+ bool ret;
- if (!boot_cpu_has(X86_FEATURE_APERFMPERF))
+ if (!cpu_feature_enabled(X86_FEATURE_APERFMPERF))
return;
- if (secondary) {
- if (static_branch_likely(&arch_scale_freq_key)) {
- init_counter_refs();
- }
- return;
- }
+ init_counter_refs();
if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
ret = intel_set_max_freq_ratio();
else if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) {
- if (!cppc_ready) {
+ if (!cppc_ready)
return;
- }
ret = amd_set_max_freq_ratio(&arch_turbo_freq_ratio);
}
if (ret) {
- init_counter_refs();
static_branch_enable(&arch_scale_freq_key);
register_freq_invariance_syscore_ops();
pr_info("Estimated ratio of average max frequency by base frequency (times 1024): %llu\n", arch_max_freq_ratio);
}
}
+void ap_init_freq_invariance(void)
+{
+ if (cpu_feature_enabled(X86_FEATURE_APERFMPERF))
+ init_counter_refs();
+}
+
static void disable_freq_invariance_workfn(struct work_struct *work)
{
static_branch_disable(&arch_scale_freq_key);
*/
set_cpu_sibling_map(raw_smp_processor_id());
- init_freq_invariance(true, false);
+ ap_init_freq_invariance();
/*
* Get our bogomips.
{
smp_prepare_cpus_common();
- init_freq_invariance(false, false);
+ bp_init_freq_invariance(false);
smp_sanity_check();
switch (apic_intr_mode) {