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| author | Joao Martins <joao.m.martins@oracle.com> | 2019-09-08 02:45:21 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-09-11 18:36:30 +0300 |
| commit | cb5d8c45ab6c3daf8269e550cfb2d5018a876fe3 (patch) | |
| tree | 0d045a3cc65bd198bf7f139a550005a96b1ef4a5 /include | |
| parent | cd4c0763064f02f42824eed61be38eafdc702281 (diff) | |
| download | linux-cb5d8c45ab6c3daf8269e550cfb2d5018a876fe3.tar.xz | |
cpuidle: allow governor switch on cpuidle_register_driver()
The recently introduced haltpoll driver is largely only useful with
haltpoll governor. To allow drivers to associate with a particular idle
behaviour, add a @governor property to 'struct cpuidle_driver' and thus
allow a cpuidle driver to switch to a *preferred* governor on idle driver
registration. We save the previous governor, and when an idle driver is
unregistered we switch back to that.
The @governor can be overridden by cpuidle.governor= boot param or
alternatively be ignored if the governor doesn't exist.
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/cpuidle.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h index 1a9f54eb3aa1..2dc4c6b19c25 100644 --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -121,6 +121,9 @@ struct cpuidle_driver { /* the driver handles the cpus in cpumask */ struct cpumask *cpumask; + + /* preferred governor to switch at register time */ + const char *governor; }; #ifdef CONFIG_CPU_IDLE |