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

Srinivas Pandruvada committed 4 years ago

Commit e4b1eb21 parent ab09b073 files · +72 −1Browse files

Showing the changes to include/uapi (1 of 3 files). Show all

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include/uapi/linux/thermal.h+5−1

@@ -44,7 +44,10 @@ enum thermal_genl_attr { · 43 unmodified lines
44	44	THERMAL_GENL_ATTR_CDEV_MAX_STATE,
45	45	THERMAL_GENL_ATTR_CDEV_NAME,
46	46	THERMAL_GENL_ATTR_GOV_NAME,
47		−
	47	+ THERMAL_GENL_ATTR_CPU_CAPABILITY,
	48	+ THERMAL_GENL_ATTR_CPU_CAPABILITY_ID,
	49	+ THERMAL_GENL_ATTR_CPU_CAPABILITY_PERFORMANCE,
	50	+ THERMAL_GENL_ATTR_CPU_CAPABILITY_EFFICIENCY,
48	51	__THERMAL_GENL_ATTR_MAX,
49	52	};
50	53	#define THERMAL_GENL_ATTR_MAX (__THERMAL_GENL_ATTR_MAX - 1)
@@ -71,6 +74,7 @@ enum thermal_genl_event { · 20 unmodified lines
71	74	THERMAL_GENL_EVENT_CDEV_DELETE, /* Cdev unbound */
72	75	THERMAL_GENL_EVENT_CDEV_STATE_UPDATE, /* Cdev state updated */
73	76	THERMAL_GENL_EVENT_TZ_GOV_CHANGE, /* Governor policy changed */
	77	+ THERMAL_GENL_EVENT_CPU_CAPABILITY_CHANGE, /* CPU capability changed */
74	78	__THERMAL_GENL_EVENT_MAX,
75	79	};
76	80	#define THERMAL_GENL_EVENT_MAX (__THERMAL_GENL_EVENT_MAX - 1)