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On processors starting from Panther Lake, additional workload type hints are provided. The hardware analyzes workload residencies over an extended period to determine whether the workload classification tends toward idle/battery life states or sustained/performance states. Based on this long-term analysis, it classifies: Power Classification: If the workload exhibits more idle or battery life residencies, it is classified as "power". This is indicated by setting bit 4 of the current workload type. Performance Classification: If the workload exhibits more sustained or performance residencies, it is classified as "performance". This is indicated by clearing bit 4 of the current workload type. This approach enables applications to ignore short-term workload fluctuations and instead respond to longer-term power vs. performance trends. Hints of this type are called slow workload hints. To get notifications for slow workload hints, bit 22 in the thermal mailbox can be used for configuring workload interrupts. It is possible to exclusively enable slow workload hints or enable them in addition to the current workload hints. To enable slow workload hints, a new sysfs attribute is added to the existing workload hint attributes: workload_slow_hint_enable (RW): Write 1 to enable, 0 to disable. Reading this attribute shows the current state. This attribute is not present on any previous generation of processors. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> [ rjw: Dropped redundant local variables, changelog edits ] Link: https://patch.msgid.link/20251218222559.4110027-2-srinivas.pandruvada@linux.intel.com Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>