diff options
| author | Mario Limonciello (AMD) <superm1@kernel.org> | 2025-11-12 16:40:23 -0600 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2025-11-14 17:05:53 +0100 |
| commit | 0ca04993dac9b0d21ffbfd22bf54cc43ec2c49f2 (patch) | |
| tree | 28003ab9b72ebaf9b2a97a96801e82cb99d88763 | |
| parent | 9cf02802d60af2ab52fc5f6d015baae946c85072 (diff) | |
PM: Introduce new PMSG_POWEROFF event
PMSG_POWEROFF will be used for the PM core to allow differentiating between
a hibernation or shutdown sequence when re-using callbacks for common code.
Hibernation is started by writing a hibernation method (such as 'platform'
'shutdown', or 'reboot') to use into /sys/power/disk and writing 'disk' to
/sys/power/state.
Shutdown is initiated with the reboot() syscall with arguments on whether
to halt the system or power it off.
Tested-by: Eric Naim <dnaim@cachyos.org>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
Link: https://patch.msgid.link/20251112224025.2051702-2-superm1@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/base/power/main.c | 5 | ||||
| -rw-r--r-- | include/linux/pm.h | 3 | ||||
| -rw-r--r-- | include/trace/events/power.h | 3 |
3 files changed, 10 insertions, 1 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 7a8807ec9a5d..38fc8a978b88 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -96,6 +96,8 @@ static const char *pm_verb(int event) return "restore"; case PM_EVENT_RECOVER: return "recover"; + case PM_EVENT_POWEROFF: + return "poweroff"; default: return "(unknown PM event)"; } @@ -368,6 +370,7 @@ static pm_callback_t pm_op(const struct dev_pm_ops *ops, pm_message_t state) case PM_EVENT_FREEZE: case PM_EVENT_QUIESCE: return ops->freeze; + case PM_EVENT_POWEROFF: case PM_EVENT_HIBERNATE: return ops->poweroff; case PM_EVENT_THAW: @@ -402,6 +405,7 @@ static pm_callback_t pm_late_early_op(const struct dev_pm_ops *ops, case PM_EVENT_FREEZE: case PM_EVENT_QUIESCE: return ops->freeze_late; + case PM_EVENT_POWEROFF: case PM_EVENT_HIBERNATE: return ops->poweroff_late; case PM_EVENT_THAW: @@ -436,6 +440,7 @@ static pm_callback_t pm_noirq_op(const struct dev_pm_ops *ops, pm_message_t stat case PM_EVENT_FREEZE: case PM_EVENT_QUIESCE: return ops->freeze_noirq; + case PM_EVENT_POWEROFF: case PM_EVENT_HIBERNATE: return ops->poweroff_noirq; case PM_EVENT_THAW: diff --git a/include/linux/pm.h b/include/linux/pm.h index a72e42eec130..7f69f739f613 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -508,6 +508,7 @@ const struct dev_pm_ops name = { \ * RECOVER Creation of a hibernation image or restoration of the main * memory contents from a hibernation image has failed, call * ->thaw() and ->complete() for all devices. + * POWEROFF System will poweroff, call ->poweroff() for all devices. * * The following PM_EVENT_ messages are defined for internal use by * kernel subsystems. They are never issued by the PM core. @@ -538,6 +539,7 @@ const struct dev_pm_ops name = { \ #define PM_EVENT_USER 0x0100 #define PM_EVENT_REMOTE 0x0200 #define PM_EVENT_AUTO 0x0400 +#define PM_EVENT_POWEROFF 0x0800 #define PM_EVENT_SLEEP (PM_EVENT_SUSPEND | PM_EVENT_HIBERNATE) #define PM_EVENT_USER_SUSPEND (PM_EVENT_USER | PM_EVENT_SUSPEND) @@ -552,6 +554,7 @@ const struct dev_pm_ops name = { \ #define PMSG_QUIESCE ((struct pm_message){ .event = PM_EVENT_QUIESCE, }) #define PMSG_SUSPEND ((struct pm_message){ .event = PM_EVENT_SUSPEND, }) #define PMSG_HIBERNATE ((struct pm_message){ .event = PM_EVENT_HIBERNATE, }) +#define PMSG_POWEROFF ((struct pm_message){ .event = PM_EVENT_POWEROFF, }) #define PMSG_RESUME ((struct pm_message){ .event = PM_EVENT_RESUME, }) #define PMSG_THAW ((struct pm_message){ .event = PM_EVENT_THAW, }) #define PMSG_RESTORE ((struct pm_message){ .event = PM_EVENT_RESTORE, }) diff --git a/include/trace/events/power.h b/include/trace/events/power.h index 82904291c2b8..370f8df2fdb4 100644 --- a/include/trace/events/power.h +++ b/include/trace/events/power.h @@ -179,7 +179,8 @@ TRACE_EVENT(pstate_sample, { PM_EVENT_HIBERNATE, "hibernate" }, \ { PM_EVENT_THAW, "thaw" }, \ { PM_EVENT_RESTORE, "restore" }, \ - { PM_EVENT_RECOVER, "recover" }) + { PM_EVENT_RECOVER, "recover" }, \ + { PM_EVENT_POWEROFF, "poweroff" }) DEFINE_EVENT(cpu, cpu_frequency, |