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| author | Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2022-01-27 22:34:53 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2022-02-03 21:50:49 +0300 |
| commit | e4b1eb24ce5a696ef7229f9926ff34d7502f0582 (patch) | |
| tree | 81250d972e1b8f51d940c54e5ddbeecd1e286b44 /drivers/thermal/thermal_netlink.h | |
| parent | ab09b0744a9944cbdc0ac9a5cb00bef72adf79d5 (diff) | |
| download | linux-e4b1eb24ce5a696ef7229f9926ff34d7502f0582.tar.xz | |
thermal: netlink: Add a new event to notify CPU capabilities change
Add a new netlink event to notify change in CPU capabilities in terms of
performance and efficiency.
Firmware may change CPU capabilities as a result of thermal events in the
system or to account for changes in the TDP (thermal design power) level.
This notification type will allow user space to avoid running workloads
on certain CPUs or proactively adjust power limits to avoid future events.
The netlink message consists of a nested attribute
(THERMAL_GENL_ATTR_CPU_CAPABILITY) with three attributes:
* THERMAL_GENL_ATTR_CPU_CAPABILITY_ID (type u32):
-- logical CPU number
* THERMAL_GENL_ATTR_CPU_CAPABILITY_PERFORMANCE (type u32):
-- Scaled performance from 0-1023
* THERMAL_GENL_ATTR_CPU_CAPABILITY_EFFICIENCY (type u32):
-- Scaled efficiency from 0-1023
Reviewed-by: Len Brown <len.brown@intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/thermal/thermal_netlink.h')
| -rw-r--r-- | drivers/thermal/thermal_netlink.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/thermal/thermal_netlink.h b/drivers/thermal/thermal_netlink.h index e554f76291f4..04d1adbbc012 100644 --- a/drivers/thermal/thermal_netlink.h +++ b/drivers/thermal/thermal_netlink.h @@ -4,6 +4,12 @@ * Author: Daniel Lezcano <daniel.lezcano@linaro.org> */ +struct thermal_genl_cpu_caps { + int cpu; + int performance; + int efficiency; +}; + /* Netlink notification function */ #ifdef CONFIG_THERMAL_NETLINK int __init thermal_netlink_init(void); @@ -23,6 +29,8 @@ int thermal_notify_cdev_add(int cdev_id, const char *name, int max_state); int thermal_notify_cdev_delete(int cdev_id); int thermal_notify_tz_gov_change(int tz_id, const char *name); int thermal_genl_sampling_temp(int id, int temp); +int thermal_genl_cpu_capability_event(int count, + struct thermal_genl_cpu_caps *caps); #else static inline int thermal_netlink_init(void) { @@ -101,4 +109,10 @@ static inline int thermal_genl_sampling_temp(int id, int temp) { return 0; } + +static inline int thermal_genl_cpu_capability_event(int count, struct cpu_capability *caps) +{ + return 0; +} + #endif /* CONFIG_THERMAL_NETLINK */ |