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cpu/hotplug: Make HOTPLUG_PARALLEL independent of HOTPLUG_SMT 

Provide stub functions for SMT related parallel bring up functions so that
HOTPLUG_PARALLEL can work without HOTPLUG_SMT.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20240716-loongarch-hotplug-v3-1-af59b3bb35c8@flygoat.com
pull/945/merge
Jiaxun Yang 2024-07-16 22:14:58 +08:00 committed by Thomas Gleixner
parent 8400291e28
commit c0e81a455e
1 changed files with 11 additions and 0 deletions
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11
kernel/cpu.c
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@ -1808,6 +1808,7 @@ static int __init parallel_bringup_parse_param(char *arg)
} }
early_param("cpuhp.parallel", parallel_bringup_parse_param); early_param("cpuhp.parallel", parallel_bringup_parse_param);
#ifdef CONFIG_HOTPLUG_SMT
static inline bool cpuhp_smt_aware(void) static inline bool cpuhp_smt_aware(void)
{ {
return cpu_smt_max_threads > 1; return cpu_smt_max_threads > 1;
@ -1817,6 +1818,16 @@ static inline const struct cpumask *cpuhp_get_primary_thread_mask(void)
{ {
return cpu_primary_thread_mask; return cpu_primary_thread_mask;
} }
#else
static inline bool cpuhp_smt_aware(void)
{
return false;
}
static inline const struct cpumask *cpuhp_get_primary_thread_mask(void)
{
return cpu_none_mask;
}
#endif
/* /*
* On architectures which have enabled parallel bringup this invokes all BP * On architectures which have enabled parallel bringup this invokes all BP