[linux-nvidia-6.17]: Replace CPPC Autonomous Series with Version That Has Been Accepted Upstream

Documentation/ABI/testing/sysfs-devices-system-cpu

@@ -327,50 +327,22 @@ Description:	Energy performance preference
 
 		This file is only present if the cppc-cpufreq driver is in use.
 
-What:		/sys/devices/system/cpu/cpuX/cpufreq/min_perf
-Date:		December 2025
+What:		/sys/devices/system/cpu/cpuX/cpufreq/perf_limited
+Date:		February 2026
 Contact:	linux-pm@vger.kernel.org
-Description:	Minimum Performance Frequency
-
-		Read/write a frequency value in kHz from/to this file. This
-		file conveys the minimum performance level (as frequency) at
-		which the platform may run. The frequency value is internally
-		converted to a performance value and must correspond to a
-		performance level in the range [Lowest Performance, Highest
-		Performance], inclusive. The minimum must be less than or equal
-		to the maximum performance. The performance range can be checked
-		from nodes:
-			/sys/devices/system/cpu/cpuX/acpi_cppc/highest_perf
-			/sys/devices/system/cpu/cpuX/acpi_cppc/lowest_perf
+Description:	Performance Limited
 
-		This file is only present if the cppc-cpufreq driver is in use.
+		Read to check if platform throttling (thermal/power/current
+		limits) caused delivered performance to fall below the
+		requested level. A non-zero value indicates throttling occurred.
 
-What:		/sys/devices/system/cpu/cpuX/cpufreq/max_perf
-Date:		December 2025
-Contact:	linux-pm@vger.kernel.org
-Description:	Maximum Performance Frequency
-
-		Read/write a frequency value in kHz from/to this file. This
-		file conveys the maximum performance level (as frequency) at
-		which the platform may run. The frequency value is internally
-		converted to a performance value and must correspond to a
-		performance level in the range [Lowest Performance, Highest
-		Performance], inclusive. The performance range can be checked
-		from nodes:
-			/sys/devices/system/cpu/cpuX/acpi_cppc/highest_perf
-			/sys/devices/system/cpu/cpuX/acpi_cppc/lowest_perf
+		Write the bitmask of bits to clear:
 
-		This file is only present if the cppc-cpufreq driver is in use.
-
-What:		/sys/devices/system/cpu/cpuX/cpufreq/perf_limited
-Date:		December 2025
-Contact:	linux-pm@vger.kernel.org
-Description:	Performance Limited
+		  - 0x1 = clear bit 0 (desired performance excursion)
+		  - 0x2 = clear bit 1 (minimum performance excursion)
+		  - 0x3 = clear both bits
 
-		Read/write a 32 bits value from/to this file. This file indicates
-		to OSPM that an unpredictable event has limited processor
-		performance, and the delivered performance may be less than
-		desired/minimum performance.
+		The platform sets these bits; OSPM can only clear them.
 
 		This file is only present if the cppc-cpufreq driver is in use.
 

Documentation/admin-guide/kernel-parameters.txt

@@ -911,18 +911,6 @@
 			Format:
 			<first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>]
 
-	cppc_cpufreq.auto_sel_mode=
-			[CPU_FREQ] Enable ACPI CPPC autonomous performance selection.
-			When enabled, hardware automatically adjusts CPU frequency
-			on all CPUs based on workload demands. In Autonomous mode,
-			Energy Performance Preference(EPP) hints guide hardware
-			toward performance(0x0) or energy efficiency (0xff).
-			Requires ACPI CPPC autonomous selection register support.
-			Format: <bool>
-			Default: 0 (disabled)
-			0: use cpufreq governors
-			1: enable if supoorted by hardware
-
 	cpuidle.off=1	[CPU_IDLE]
 			disable the cpuidle sub-system
 
@@ -937,6 +925,19 @@
 			policy to use. This governor must be registered in the
 			kernel before the cpufreq driver probes.
 
+	cppc_cpufreq.auto_sel_mode=
+			[CPU_FREQ] Enable ACPI CPPC autonomous performance
+			selection. When enabled, hardware automatically adjusts
+			CPU frequency on all CPUs based on workload demands.
+			In Autonomous mode, Energy Performance Preference (EPP)
+			hints guide hardware toward performance (0x0) or energy
+			efficiency (0xff).
+			Requires ACPI CPPC autonomous selection register support.
+			Format: <bool>
+			Default: 0 (disabled)
+			0: use cpufreq governors
+			1: enable if supported by hardware
+
 	cpu_init_udelay=N
 			[X86,EARLY] Delay for N microsec between assert and de-assert
 			of APIC INIT to start processors.  This delay occurs