diff options
| author | Ulf Hansson <[email protected]> | 2024-05-27 16:25:51 +0200 |
|---|---|---|
| committer | Ulf Hansson <[email protected]> | 2024-08-05 13:12:04 +0200 |
| commit | d7bdb8e6aabe218fd980768a1486434e42761539 (patch) | |
| tree | a04ca728f0b95fa0a8e12fa92aacabebdf2e0cef /include/linux | |
| parent | 328fc9b29810819c4496c6e9fd74491ca458045e (diff) | |
pmdomain: core: Enable s2idle for CPU PM domains on PREEMPT_RT
To allow a genpd provider for a CPU PM domain to enter a domain-idle-state
during s2idle on a PREEMPT_RT based configuration, we can't use the regular
spinlock, as they are turned into sleepable locks on PREEMPT_RT.
To address this problem, let's convert into using the raw spinlock, but
only for genpd providers that have the GENPD_FLAG_CPU_DOMAIN bit set. In
this way, the lock can still be acquired/released in atomic context, which
is needed in the idle-path for PREEMPT_RT.
Do note that the genpd power-on/off notifiers may also be fired during
s2idle, but these are already prepared for PREEMPT_RT as they are based on
the raw notifiers. However, consumers of them may need to adopt accordingly
to work properly on PREEMPT_RT.
Signed-off-by: Ulf Hansson <[email protected]>
Tested-by: Raghavendra Kakarla <[email protected]> # qcm6490 with PREEMPT_RT set
Acked-by: Sebastian Andrzej Siewior <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/pm_domain.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 858c8e7851fb..b86bb52858ac 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -198,8 +198,11 @@ struct generic_pm_domain { spinlock_t slock; unsigned long lock_flags; }; + struct { + raw_spinlock_t raw_slock; + unsigned long raw_lock_flags; + }; }; - }; static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd) |