What:		/dev/amdpmf_interfaceDate:		June 2026KernelVersion:	7.2Contact:	Shyam Sundar S K <Shyam-sundar.S-k@amd.com>Description:		The AMD Platform Management Framework (PMF) util layer exposes a		minimal user-space interface via a character device for feature		discovery and metrics monitoring. 		When CONFIG_AMD_PMF_UTIL_SUPPORT is enabled, the driver creates		a character device: 		======================		/dev/amdpmf_interface		====================== 		The interface supports a single ioctl: 		============================ =======================================		IOCTL			     Usage		IOCTL_AMD_PMF_POPULATE_DATA  User passes a struct amd_pmf_info with					     the size field set to sizeof(struct					     amd_pmf_info). The driver returns all					     available metrics and feature status					     in the structure.		============================ ======================================= 		struct amd_pmf_info layout: 		======================= ========== ================================		Field			Type	   Description		size			__u64	   Structure size for versioning		features_supported	__u32	   Bitmask of supported features		platform_type		__u32	   Platform form factor orientation		power_source		__u32	   AC/DC power source		laptop_placement	__u32	   Device placement state		lid_state		__u32	   Lid open/closed status		user_presence		__u32	   User presence detection		slider_position		__u32	   Current power slider position		skin_temp		__s32	   Skin temperature (centidegrees)		gfx_busy		__u32	   Graphics workload percentage		ambient_light		__s32	   Ambient light sensor reading		avg_c0_residency	__u32	   Average C0 state residency		max_c0_residency	__u32	   Maximum C0 state residency		socket_power		__u32	   Socket power consumption		bios_input[10]		__u32	   Custom BIOS input parameters		bios_output[10]		__u32	   Custom BIOS output parameters		======================= ========== ================================ 		Feature Support Flags (features_supported bitmask): 		=====================================    ====  =============================		Flag				         Bit   Description		AMD_PMF_FEAT_AUTO_MODE		         0     Auto Mode feature support		AMD_PMF_FEAT_STATIC_POWER_SLIDER         1     Static Power Slider support		AMD_PMF_FEAT_POLICY_BUILDER	         2     Policy Builder (Smart PC)		AMD_PMF_FEAT_DYNAMIC_POWER_SLIDER_AC     3     Dynamic slider on AC		AMD_PMF_FEAT_DYNAMIC_POWER_SLIDER_DC     4     Dynamic slider on DC		=====================================    ====  ============================= 		Return codes: 		============= ============================================================		Return code   Description		0	      Success		EINVAL	      Invalid size or parameter		EFAULT	      copy_to_user/copy_from_user failures		ENODEV	      PMF device not available		ENOTTY	      Unknown ioctl command		============= ============================================================ 		User-space tools integrating with AMD PMF to discover capabilities and		monitor real-time metrics for thermal and power management validation.