diff options
| author | James Morse <james.morse@arm.com> | 2022-11-02 16:15:24 +0000 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2023-11-27 10:58:05 +0000 |
| commit | ddc119d8c1619b99f00ec1c332bf71c1d062d98e (patch) | |
| tree | 2032b382c997df28f7b02bf11c3694dfbbd7c159 /kernel/cpu.c | |
| parent | bb1c2fed172727129538e4327faf84f0ff634422 (diff) | |
cpumask: Add enabled cpumask for present CPUs that can be brought onlineaarch64/hotplug-vcpu/v6.7-rc3
The 'offline' file in sysfs shows all offline CPUs, including those
that aren't present. User-space is expected to remove not-present CPUs
from this list to learn which CPUs could be brought online.
CPUs can be present but not-enabled. These CPUs can't be brought online
until the firmware policy changes, which comes with an ACPI notification
that will register the CPUs.
With only the offline and present files, user-space is unable to
determine which CPUs it can try to bring online. Add a new CPU mask
that shows this based on all the registered CPUs.
Signed-off-by: James Morse <james.morse@arm.com>
Diffstat (limited to 'kernel/cpu.c')
| -rw-r--r-- | kernel/cpu.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c index a86972a91991..fe0a5189f8ae 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -3122,6 +3122,9 @@ EXPORT_SYMBOL(__cpu_possible_mask); struct cpumask __cpu_online_mask __read_mostly; EXPORT_SYMBOL(__cpu_online_mask); +struct cpumask __cpu_enabled_mask __read_mostly; +EXPORT_SYMBOL(__cpu_enabled_mask); + struct cpumask __cpu_present_mask __read_mostly; EXPORT_SYMBOL(__cpu_present_mask); |