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sched/isolation: Use single feature type while referring to housekeeping cpumask

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Refer to housekeeping APIs using single feature types instead of flags.
This prevents from passing multiple isolation features at once to
housekeeping interfaces, which soon won't be possible anymore as each
isolation features will have their own cpumask.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Juri Lelli <juri.lelli@redhat.com>
Reviewed-by: Phil Auld <pauld@redhat.com>
Link: https://lore.kernel.org/r/20220207155910.527133-5-frederic@kernel.org
This commit is contained in:
Frederic Weisbecker
2022-02-07 16:59:06 +01:00
committed by Peter Zijlstra
parent c8fb9f22ae
commit 04d4e665a6
19 changed files with 86 additions and 73 deletions
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43
include/linux/sched/isolation.h
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@@ -5,54 +5,55 @@
#include <linux/init.h>
#include <linux/tick.h>
enum hk_flags {
HK_FLAG_TIMER = 1,
HK_FLAG_RCU = (1 << 1),
HK_FLAG_MISC = (1 << 2),
HK_FLAG_SCHED = (1 << 3),
HK_FLAG_TICK = (1 << 4),
HK_FLAG_DOMAIN = (1 << 5),
HK_FLAG_WQ = (1 << 6),
HK_FLAG_MANAGED_IRQ = (1 << 7),
HK_FLAG_KTHREAD = (1 << 8),
enum hk_type {
HK_TYPE_TIMER,
HK_TYPE_RCU,
HK_TYPE_MISC,
HK_TYPE_SCHED,
HK_TYPE_TICK,
HK_TYPE_DOMAIN,
HK_TYPE_WQ,
HK_TYPE_MANAGED_IRQ,
HK_TYPE_KTHREAD,
HK_TYPE_MAX
};
#ifdef CONFIG_CPU_ISOLATION
DECLARE_STATIC_KEY_FALSE(housekeeping_overridden);
extern int housekeeping_any_cpu(enum hk_flags flags);
extern const struct cpumask *housekeeping_cpumask(enum hk_flags flags);
extern bool housekeeping_enabled(enum hk_flags flags);
extern void housekeeping_affine(struct task_struct *t, enum hk_flags flags);
extern bool housekeeping_test_cpu(int cpu, enum hk_flags flags);
extern int housekeeping_any_cpu(enum hk_type type);
extern const struct cpumask *housekeeping_cpumask(enum hk_type type);
extern bool housekeeping_enabled(enum hk_type type);
extern void housekeeping_affine(struct task_struct *t, enum hk_type type);
extern bool housekeeping_test_cpu(int cpu, enum hk_type type);
extern void __init housekeeping_init(void);
#else
static inline int housekeeping_any_cpu(enum hk_flags flags)
static inline int housekeeping_any_cpu(enum hk_type type)
{
return smp_processor_id();
}
static inline const struct cpumask *housekeeping_cpumask(enum hk_flags flags)
static inline const struct cpumask *housekeeping_cpumask(enum hk_type type)
{
return cpu_possible_mask;
}
static inline bool housekeeping_enabled(enum hk_flags flags)
static inline bool housekeeping_enabled(enum hk_type type)
{
return false;
}
static inline void housekeeping_affine(struct task_struct *t,
enum hk_flags flags) { }
enum hk_type type) { }
static inline void housekeeping_init(void) { }
#endif /* CONFIG_CPU_ISOLATION */
static inline bool housekeeping_cpu(int cpu, enum hk_flags flags)
static inline bool housekeeping_cpu(int cpu, enum hk_type type)
{
#ifdef CONFIG_CPU_ISOLATION
if (static_branch_unlikely(&housekeeping_overridden))
return housekeeping_test_cpu(cpu, flags);
return housekeeping_test_cpu(cpu, type);
#endif
return true;
}