> > and
> >
> > /sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us
> >
>
> No relation to this one for what's in the series.
>
> >> Suggested-by: David E Box <david.e.box@xxxxxxxxx
<mailto:david.e.box@xxxxxxxxx>>
> >> Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx
<mailto:mario.limonciello@xxxxxxx>>
> >> ---
> >> Documentation/ABI/testing/sysfs-power | 17 +++++++++++
> >> include/linux/suspend.h | 4 +++
> >> kernel/power/main.c | 42
+++++++++++++++++++++++++++
> >> kernel/power/suspend.c | 2 ++
> >> kernel/time/timekeeping.c | 2 ++
> >> 5 files changed, 67 insertions(+)
> >>
> >> diff --git a/Documentation/ABI/testing/sysfs-power
b/Documentation/ABI/testing/sysfs-power
> >> index f99d433ff311..5b47cbb4dc9e 100644
> >> --- a/Documentation/ABI/testing/sysfs-power
> >> +++ b/Documentation/ABI/testing/sysfs-power
> >> @@ -413,6 +413,23 @@ Description:
> >> The /sys/power/suspend_stats/last_failed_step
file contains
> >> the last failed step in the suspend/resume path.
> >>
> >> +What: /sys/power/suspend_stats/last_hw_state_residency
> >> +Date: December 2022
> >> +Contact: Mario Limonciello <mario.limonciello@xxxxxxx
<mailto:mario.limonciello@xxxxxxx>>
> >> +Description:
> >> + The
/sys/power/suspend_stats/last_hw_state_residency file contains
> >> + the amount of time spent in a hardware sleep
state.
> >> + This attribute is only available if the system
supports
> >> + low power idle. This is measured in microseconds.
> >> +
> >> +What: /sys/power/suspend_stats/last_suspend_total
> >> +Date: December 2022
> >> +Contact: Mario Limonciello <mario.limonciello@xxxxxxx
<mailto:mario.limonciello@xxxxxxx>>
> >> +Description:
> >> + The
/sys/power/suspend_stats/last_suspend_total file contains
> >> + the total duration of the sleep cycle.
> >> + This is measured in microseconds.
> >> +
> >> What: /sys/power/sync_on_suspend
> >> Date: October 2019
> >> Contact: Jonas Meurer <jonas@xxxxxxxxxxxxxxx
<mailto:jonas@xxxxxxxxxxxxxxx>>
> >> diff --git a/include/linux/suspend.h b/include/linux/suspend.h
> >> index cfe19a028918..af343c3f8198 100644
> >> --- a/include/linux/suspend.h
> >> +++ b/include/linux/suspend.h
> >> @@ -68,6 +68,8 @@ struct suspend_stats {
> >> int last_failed_errno;
> >> int errno[REC_FAILED_NUM];
> >> int last_failed_step;
> >> + u64 last_hw_state_residency;
> >> + u64 last_suspend_total;
> >> enum suspend_stat_step failed_steps[REC_FAILED_NUM];
> >> };
> >>
> >> @@ -489,6 +491,8 @@ void restore_processor_state(void);
> >> extern int register_pm_notifier(struct notifier_block *nb);
> >> extern int unregister_pm_notifier(struct notifier_block *nb);
> >> extern void ksys_sync_helper(void);
> >> +extern void pm_set_hw_state_residency(u64 duration);
> >> +extern void pm_account_suspend_type(const struct timespec64 *t);
> >>
> >> #define pm_notifier(fn, pri) { \
> >> static struct notifier_block fn##_nb = \
> >> diff --git a/kernel/power/main.c b/kernel/power/main.c
> >> index 31ec4a9b9d70..11bd658583b0 100644
> >> --- a/kernel/power/main.c
> >> +++ b/kernel/power/main.c
> >> @@ -6,6 +6,7 @@
> >> * Copyright (c) 2003 Open Source Development Lab
> >> */
> >>
> >> +#include <linux/acpi.h>
> >> #include <linux/export.h>
> >> #include <linux/kobject.h>
> >> #include <linux/string.h>
> >> @@ -54,6 +55,19 @@ void unlock_system_sleep(unsigned int flags)
> >> }
> >> EXPORT_SYMBOL_GPL(unlock_system_sleep);
> >>
> >> +void pm_set_hw_state_residency(u64 duration)
> >> +{
> >> + suspend_stats.last_hw_state_residency = duration;
> >> +}
> >> +EXPORT_SYMBOL_GPL(pm_set_hw_state_residency);
> >> +
> >> +void pm_account_suspend_type(const struct timespec64 *t)
> >> +{
> >> + suspend_stats.last_suspend_total += (s64)t->tv_sec *
USEC_PER_SEC +
> >> + t->tv_nsec /
NSEC_PER_USEC;
> >> +}
> >> +EXPORT_SYMBOL_GPL(pm_account_suspend_type);
> >> +
> >> void ksys_sync_helper(void)
> >> {
> >> ktime_t start;
> >> @@ -377,6 +391,20 @@ static ssize_t
last_failed_step_show(struct kobject *kobj,
> >> }
> >> static struct kobj_attribute last_failed_step =
__ATTR_RO(last_failed_step);
> >>
> >> +static ssize_t last_hw_state_residency_show(struct kobject *kobj,
> >> + struct kobj_attribute *attr, char *buf)
> >> +{
> >> + return sprintf(buf, "%llu\n",
suspend_stats.last_hw_state_residency);
> >> +}
> >> +static struct kobj_attribute last_hw_state_residency =
__ATTR_RO(last_hw_state_residency);
> >> +
> >> +static ssize_t last_suspend_total_show(struct kobject *kobj,
> >> + struct kobj_attribute *attr, char *buf)
> >> +{
> >> + return sprintf(buf, "%llu\n",
suspend_stats.last_suspend_total);
> >> +}
> >> +static struct kobj_attribute last_suspend_total =
__ATTR_RO(last_suspend_total);
> >> +
> >> static struct attribute *suspend_attrs[] = {
> >> &success.attr,
> >> &fail.attr,
> >> @@ -391,12 +419,26 @@ static struct attribute *suspend_attrs[] = {
> >> &last_failed_dev.attr,
> >> &last_failed_errno.attr,
> >> &last_failed_step.attr,
> >> + &last_hw_state_residency.attr,
> >> + &last_suspend_total.attr,
> >> NULL,
> >> };
> >>
> >> +static umode_t suspend_attr_is_visible(struct kobject *kobj,
struct attribute *attr, int idx)
> >> +{
> >> + if (attr != &last_hw_state_residency.attr)
> >> + return 0444;
> >> +#ifdef CONFIG_ACPI
> >> + if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)
> >> + return 0444;
> >> +#endif
> >> + return 0;
> >> +}
> >> +
> >> static const struct attribute_group suspend_attr_group = {
> >> .name = "suspend_stats",
> >> .attrs = suspend_attrs,
> >> + .is_visible = suspend_attr_is_visible,
> >> };
> >>
> >> #ifdef CONFIG_DEBUG_FS
> >> diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
> >> index fa3bf161d13f..b6c4a3733212 100644
> >> --- a/kernel/power/suspend.c
> >> +++ b/kernel/power/suspend.c
> >> @@ -423,6 +423,8 @@ static int suspend_enter(suspend_state_t
state, bool *wakeup)
> >> if (suspend_test(TEST_PLATFORM))
> >> goto Platform_wake;
> >>
> >> + suspend_stats.last_suspend_total = 0;
> >> +
> >> if (state == PM_SUSPEND_TO_IDLE) {
> >> s2idle_loop();
> >> goto Platform_wake;
> >> diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
> >> index f72b9f1de178..e1b356787e53 100644
> >> --- a/kernel/time/timekeeping.c
> >> +++ b/kernel/time/timekeeping.c
> >> @@ -24,6 +24,7 @@
> >> #include <linux/compiler.h>
> >> #include <linux/audit.h>
> >> #include <linux/random.h>
> >> +#include <linux/suspend.h>
> >>
> >> #include "tick-internal.h"
> >> #include "ntp_internal.h"
> >> @@ -1698,6 +1699,7 @@ static void
__timekeeping_inject_sleeptime(struct timekeeper *tk,
> >> tk_set_wall_to_mono(tk,
timespec64_sub(tk->wall_to_monotonic, *delta));
> >> tk_update_sleep_time(tk, timespec64_to_ktime(*delta));
> >> tk_debug_account_sleep_time(delta);
> >> + pm_account_suspend_type(delta);
> >> }
> >>
> >> #if defined(CONFIG_PM_SLEEP) &&
defined(CONFIG_RTC_HCTOSYS_DEVICE)
> >> --
> >> 2.34.1
> >>
>
