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| author | Olav Haugan <ohaugan@codeaurora.org> | 2016-05-29 19:56:37 -0700 |
|---|---|---|
| committer | Olav Haugan <ohaugan@codeaurora.org> | 2016-09-20 17:47:13 -0700 |
| commit | fc70615291343d031b148bb2676963419a7b672e (patch) | |
| tree | 673257c37023bc525e380a8b08f32833af95c493 /kernel/cpu.c | |
| parent | 922fed628c625b28a50f66267e4b9f99088e2aa4 (diff) | |
cpumask: Add cpu isolation support
Add bitmask and corresponding supporting functions for cpu isolation.
Change-Id: Ice1a9503666a2b720bdb324289ca55ceb33097cd
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
Diffstat (limited to 'kernel/cpu.c')
| -rw-r--r-- | kernel/cpu.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c index 1cfd381642da..3c97f5b88a07 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -768,6 +768,10 @@ static DECLARE_BITMAP(cpu_active_bits, CONFIG_NR_CPUS) __read_mostly; const struct cpumask *const cpu_active_mask = to_cpumask(cpu_active_bits); EXPORT_SYMBOL(cpu_active_mask); +static DECLARE_BITMAP(cpu_isolated_bits, CONFIG_NR_CPUS) __read_mostly; +const struct cpumask *const cpu_isolated_mask = to_cpumask(cpu_isolated_bits); +EXPORT_SYMBOL(cpu_isolated_mask); + void set_cpu_possible(unsigned int cpu, bool possible) { if (possible) @@ -802,6 +806,14 @@ void set_cpu_active(unsigned int cpu, bool active) cpumask_clear_cpu(cpu, to_cpumask(cpu_active_bits)); } +void set_cpu_isolated(unsigned int cpu, bool isolated) +{ + if (isolated) + cpumask_set_cpu(cpu, to_cpumask(cpu_isolated_bits)); + else + cpumask_clear_cpu(cpu, to_cpumask(cpu_isolated_bits)); +} + void init_cpu_present(const struct cpumask *src) { cpumask_copy(to_cpumask(cpu_present_bits), src); @@ -817,6 +829,11 @@ void init_cpu_online(const struct cpumask *src) cpumask_copy(to_cpumask(cpu_online_bits), src); } +void init_cpu_isolated(const struct cpumask *src) +{ + cpumask_copy(to_cpumask(cpu_isolated_bits), src); +} + static ATOMIC_NOTIFIER_HEAD(idle_notifier); void idle_notifier_register(struct notifier_block *n) |