[mirror_ubuntu-jammy-kernel.git] / drivers / cpufreq / Kconfig.x86

# SPDX-License-Identifier: GPL-2.0-only
#
# x86 CPU Frequency scaling drivers
#

config X86_INTEL_PSTATE
	bool "Intel P state control"
	depends on X86
	select ACPI_PROCESSOR if ACPI
	select ACPI_CPPC_LIB if X86_64 && ACPI && SCHED_MC_PRIO
	select CPU_FREQ_GOV_PERFORMANCE
	select CPU_FREQ_GOV_SCHEDUTIL if SMP
	help
	  This driver provides a P state for Intel core processors.
	  The driver implements an internal governor and will become
	  the scaling driver and governor for Sandy bridge processors.

	  When this driver is enabled it will become the preferred
	  scaling driver for Sandy bridge processors.

	  If in doubt, say N.

config X86_PCC_CPUFREQ
	tristate "Processor Clocking Control interface driver"
	depends on ACPI && ACPI_PROCESSOR
	help
	  This driver adds support for the PCC interface.

	  For details, take a look at:
	  <file:Documentation/admin-guide/pm/cpufreq_drivers.rst>.

	  To compile this driver as a module, choose M here: the
	  module will be called pcc-cpufreq.

	  If in doubt, say N.

config X86_ACPI_CPUFREQ
	tristate "ACPI Processor P-States driver"
	depends on ACPI_PROCESSOR
	help
	  This driver adds a CPUFreq driver which utilizes the ACPI
	  Processor Performance States.
	  This driver also supports Intel Enhanced Speedstep and newer
	  AMD CPUs.

	  To compile this driver as a module, choose M here: the
	  module will be called acpi-cpufreq.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config X86_ACPI_CPUFREQ_CPB
	default y
	bool "Legacy cpb sysfs knob support for AMD CPUs"
	depends on X86_ACPI_CPUFREQ && CPU_SUP_AMD
	help
	  The powernow-k8 driver used to provide a sysfs knob called "cpb"
	  to disable the Core Performance Boosting feature of AMD CPUs. This
	  file has now been superseded by the more generic "boost" entry.

	  By enabling this option the acpi_cpufreq driver provides the old
	  entry in addition to the new boost ones, for compatibility reasons.

config ELAN_CPUFREQ
	tristate "AMD Elan SC400 and SC410"
	depends on MELAN
	help
	  This adds the CPUFreq driver for AMD Elan SC400 and SC410
	  processors.

	  You need to specify the processor maximum speed as boot
	  parameter: elanfreq=maxspeed (in kHz) or as module
	  parameter "max_freq".

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config SC520_CPUFREQ
	tristate "AMD Elan SC520"
	depends on MELAN
	help
	  This adds the CPUFreq driver for AMD Elan SC520 processor.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.


config X86_POWERNOW_K6
	tristate "AMD Mobile K6-2/K6-3 PowerNow!"
	depends on X86_32
	help
	  This adds the CPUFreq driver for mobile AMD K6-2+ and mobile
	  AMD K6-3+ processors.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config X86_POWERNOW_K7
	tristate "AMD Mobile Athlon/Duron PowerNow!"
	depends on X86_32
	help
	  This adds the CPUFreq driver for mobile AMD K7 mobile processors.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config X86_POWERNOW_K7_ACPI
	bool
	depends on X86_POWERNOW_K7 && ACPI_PROCESSOR
	depends on !(X86_POWERNOW_K7 = y && ACPI_PROCESSOR = m)
	depends on X86_32
	default y

config X86_POWERNOW_K8
	tristate "AMD Opteron/Athlon64 PowerNow!"
	depends on ACPI && ACPI_PROCESSOR && X86_ACPI_CPUFREQ
	help
	  This adds the CPUFreq driver for K8/early Opteron/Athlon64 processors.
	  Support for K10 and newer processors is now in acpi-cpufreq.

	  To compile this driver as a module, choose M here: the
	  module will be called powernow-k8.

	  For details, take a look at <file:Documentation/cpu-freq/>.

config X86_AMD_FREQ_SENSITIVITY
	tristate "AMD frequency sensitivity feedback powersave bias"
	depends on CPU_FREQ_GOV_ONDEMAND && X86_ACPI_CPUFREQ && CPU_SUP_AMD
	help
	  This adds AMD-specific powersave bias function to the ondemand
	  governor, which allows it to make more power-conscious frequency
	  change decisions based on feedback from hardware (available on AMD
	  Family 16h and above).

	  Hardware feedback tells software how "sensitive" to frequency changes
	  the CPUs' workloads are. CPU-bound workloads will be more sensitive
	  -- they will perform better as frequency increases. Memory/IO-bound
	  workloads will be less sensitive -- they will not necessarily perform
	  better as frequency increases.

	  If in doubt, say N.

config X86_GX_SUSPMOD
	tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation"
	depends on X86_32 && PCI
	help
	 This add the CPUFreq driver for NatSemi Geode processors which
	 support suspend modulation.

	 For details, take a look at <file:Documentation/cpu-freq/>.

	 If in doubt, say N.

config X86_SPEEDSTEP_CENTRINO
	tristate "Intel Enhanced SpeedStep (deprecated)"
	select X86_SPEEDSTEP_CENTRINO_TABLE if X86_32
	depends on X86_32 || (X86_64 && ACPI_PROCESSOR)
	help
	  This is deprecated and this functionality is now merged into
	  acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of
	  speedstep_centrino.
	  This adds the CPUFreq driver for Enhanced SpeedStep enabled
	  mobile CPUs.  This means Intel Pentium M (Centrino) CPUs
	  or 64bit enabled Intel Xeons.

	  To compile this driver as a module, choose M here: the
	  module will be called speedstep-centrino.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config X86_SPEEDSTEP_CENTRINO_TABLE
	bool "Built-in tables for Banias CPUs"
	depends on X86_32 && X86_SPEEDSTEP_CENTRINO
	default y
	help
	  Use built-in tables for Banias CPUs if ACPI encoding
	  is not available.

	  If in doubt, say N.

config X86_SPEEDSTEP_ICH
	tristate "Intel Speedstep on ICH-M chipsets (ioport interface)"
	depends on X86_32
	help
	  This adds the CPUFreq driver for certain mobile Intel Pentium III
	  (Coppermine), all mobile Intel Pentium III-M (Tualatin) and all
	  mobile Intel Pentium 4 P4-M on systems which have an Intel ICH2,
	  ICH3 or ICH4 southbridge.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config X86_SPEEDSTEP_SMI
	tristate "Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface)"
	depends on X86_32
	help
	  This adds the CPUFreq driver for certain mobile Intel Pentium III
	  (Coppermine), all mobile Intel Pentium III-M (Tualatin)
	  on systems which have an Intel 440BX/ZX/MX southbridge.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config X86_P4_CLOCKMOD
	tristate "Intel Pentium 4 clock modulation"
	help
	  This adds the CPUFreq driver for Intel Pentium 4 / XEON
	  processors.  When enabled it will lower CPU temperature by skipping
	  clocks.

	  This driver should be only used in exceptional
	  circumstances when very low power is needed because it causes severe
	  slowdowns and noticeable latencies.  Normally Speedstep should be used
	  instead.

	  To compile this driver as a module, choose M here: the
	  module will be called p4-clockmod.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  Unless you are absolutely sure say N.

config X86_CPUFREQ_NFORCE2
	tristate "nVidia nForce2 FSB changing"
	depends on X86_32
	help
	  This adds the CPUFreq driver for FSB changing on nVidia nForce2
	  platforms.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config X86_LONGRUN
	tristate "Transmeta LongRun"
	depends on X86_32
	help
	  This adds the CPUFreq driver for Transmeta Crusoe and Efficeon processors
	  which support LongRun.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.

config X86_LONGHAUL
	tristate "VIA Cyrix III Longhaul"
	depends on X86_32 && ACPI_PROCESSOR
	help
	  This adds the CPUFreq driver for VIA Samuel/CyrixIII,
	  VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T
	  processors.

	  For details, take a look at <file:Documentation/cpu-freq/>.

	  If in doubt, say N.
Commit	Line	Data
ec8f24b7	1	# SPDX-License-Identifier: GPL-2.0-only
1da177e4	2	#
bb0a56ec	3	# x86 CPU Frequency scaling drivers
1da177e4 LT	4	#
1da177e4 LT	5
93f0822d	6	config X86_INTEL_PSTATE
cde10f85 KK	7	bool "Intel P state control"
	8	depends on X86
	9	select ACPI_PROCESSOR if ACPI
	10	select ACPI_CPPC_LIB if X86_64 && ACPI && SCHED_MC_PRIO
a00ec387 RW	11	select CPU_FREQ_GOV_PERFORMANCE
a00ec387 RW	12	select CPU_FREQ_GOV_SCHEDUTIL if SMP
cde10f85 KK	13	help
cde10f85 KK	14	This driver provides a P state for Intel core processors.
93f0822d	15	The driver implements an internal governor and will become
cde10f85	16	the scaling driver and governor for Sandy bridge processors.
93f0822d	17
735dc249	18	When this driver is enabled it will become the preferred
cde10f85	19	scaling driver for Sandy bridge processors.
93f0822d	20
93f0822d DB	21	If in doubt, say N.
93f0822d DB	22
0f1d683f NC	23	config X86_PCC_CPUFREQ
	24	tristate "Processor Clocking Control interface driver"
	25	depends on ACPI && ACPI_PROCESSOR
	26	help
	27	This driver adds support for the PCC interface.
	28
	29	For details, take a look at:
c3419b71	30	<file:Documentation/admin-guide/pm/cpufreq_drivers.rst>.
0f1d683f NC	31
	32	To compile this driver as a module, choose M here: the
	33	module will be called pcc-cpufreq.
	34
	35	If in doubt, say N.
	36
1da177e4 LT	37	config X86_ACPI_CPUFREQ
1da177e4 LT	38	tristate "ACPI Processor P-States driver"
1da177e4 LT	39	depends on ACPI_PROCESSOR
	40	help
	41	This driver adds a CPUFreq driver which utilizes the ACPI
	42	Processor Performance States.
3dc9a633 MG	43	This driver also supports Intel Enhanced Speedstep and newer
3dc9a633 MG	44	AMD CPUs.
1da177e4	45
e8ef9522 SR	46	To compile this driver as a module, choose M here: the
	47	module will be called acpi-cpufreq.
	48
1da177e4 LT	49	For details, take a look at <file:Documentation/cpu-freq/>.
	50
	51	If in doubt, say N.
	52
11269ff5 AP	53	config X86_ACPI_CPUFREQ_CPB
	54	default y
	55	bool "Legacy cpb sysfs knob support for AMD CPUs"
	56	depends on X86_ACPI_CPUFREQ && CPU_SUP_AMD
	57	help
	58	The powernow-k8 driver used to provide a sysfs knob called "cpb"
	59	to disable the Core Performance Boosting feature of AMD CPUs. This
735dc249	60	file has now been superseded by the more generic "boost" entry.
11269ff5 AP	61
	62	By enabling this option the acpi_cpufreq driver provides the old
	63	entry in addition to the new boost ones, for compatibility reasons.
	64
1da177e4	65	config ELAN_CPUFREQ
bf6fc9fd	66	tristate "AMD Elan SC400 and SC410"
ce9c99af	67	depends on MELAN
a7f7f624	68	help
1da177e4 LT	69	This adds the CPUFreq driver for AMD Elan SC400 and SC410
	70	processors.
	71
	72	You need to specify the processor maximum speed as boot
	73	parameter: elanfreq=maxspeed (in kHz) or as module
	74	parameter "max_freq".
	75
	76	For details, take a look at <file:Documentation/cpu-freq/>.
	77
	78	If in doubt, say N.
	79
bf6fc9fd DJ	80	config SC520_CPUFREQ
bf6fc9fd DJ	81	tristate "AMD Elan SC520"
ce9c99af	82	depends on MELAN
a7f7f624	83	help
bf6fc9fd DJ	84	This adds the CPUFreq driver for AMD Elan SC520 processor.
	85
	86	For details, take a look at <file:Documentation/cpu-freq/>.
	87
	88	If in doubt, say N.
	89
	90
1da177e4 LT	91	config X86_POWERNOW_K6
1da177e4 LT	92	tristate "AMD Mobile K6-2/K6-3 PowerNow!"
e8ef9522	93	depends on X86_32
1da177e4 LT	94	help
	95	This adds the CPUFreq driver for mobile AMD K6-2+ and mobile
	96	AMD K6-3+ processors.
	97
	98	For details, take a look at <file:Documentation/cpu-freq/>.
	99
	100	If in doubt, say N.
	101
	102	config X86_POWERNOW_K7
	103	tristate "AMD Mobile Athlon/Duron PowerNow!"
e8ef9522	104	depends on X86_32
1da177e4 LT	105	help
	106	This adds the CPUFreq driver for mobile AMD K7 mobile processors.
	107
	108	For details, take a look at <file:Documentation/cpu-freq/>.
	109
	110	If in doubt, say N.
	111
	112	config X86_POWERNOW_K7_ACPI
	113	bool
	114	depends on X86_POWERNOW_K7 && ACPI_PROCESSOR
	115	depends on !(X86_POWERNOW_K7 = y && ACPI_PROCESSOR = m)
e8ef9522	116	depends on X86_32
1da177e4 LT	117	default y
	118
	119	config X86_POWERNOW_K8
	120	tristate "AMD Opteron/Athlon64 PowerNow!"
631e8ac1	121	depends on ACPI && ACPI_PROCESSOR && X86_ACPI_CPUFREQ
1da177e4	122	help
034be8fd AP	123	This adds the CPUFreq driver for K8/early Opteron/Athlon64 processors.
034be8fd AP	124	Support for K10 and newer processors is now in acpi-cpufreq.
1da177e4	125
e8ef9522 SR	126	To compile this driver as a module, choose M here: the
	127	module will be called powernow-k8.
	128
1da177e4 LT	129	For details, take a look at <file:Documentation/cpu-freq/>.
1da177e4 LT	130
9c5320c8 JS	131	config X86_AMD_FREQ_SENSITIVITY
	132	tristate "AMD frequency sensitivity feedback powersave bias"
	133	depends on CPU_FREQ_GOV_ONDEMAND && X86_ACPI_CPUFREQ && CPU_SUP_AMD
	134	help
	135	This adds AMD-specific powersave bias function to the ondemand
	136	governor, which allows it to make more power-conscious frequency
8c88126b	137	change decisions based on feedback from hardware (available on AMD
9c5320c8 JS	138	Family 16h and above).
	139
	140	Hardware feedback tells software how "sensitive" to frequency changes
	141	the CPUs' workloads are. CPU-bound workloads will be more sensitive
	142	-- they will perform better as frequency increases. Memory/IO-bound
	143	workloads will be less sensitive -- they will not necessarily perform
	144	better as frequency increases.
	145
	146	If in doubt, say N.
	147
1da177e4 LT	148	config X86_GX_SUSPMOD
1da177e4 LT	149	tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation"
e8ef9522	150	depends on X86_32 && PCI
1da177e4 LT	151	help
	152	This add the CPUFreq driver for NatSemi Geode processors which
	153	support suspend modulation.
	154
	155	For details, take a look at <file:Documentation/cpu-freq/>.
	156
	157	If in doubt, say N.
	158
	159	config X86_SPEEDSTEP_CENTRINO
e8ef9522	160	tristate "Intel Enhanced SpeedStep (deprecated)"
e8ef9522 SR	161	select X86_SPEEDSTEP_CENTRINO_TABLE if X86_32
e8ef9522 SR	162	depends on X86_32 \|\| (X86_64 && ACPI_PROCESSOR)
1da177e4	163	help
e8ef9522 SR	164	This is deprecated and this functionality is now merged into
	165	acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of
	166	speedstep_centrino.
1da177e4	167	This adds the CPUFreq driver for Enhanced SpeedStep enabled
e8ef9522 SR	168	mobile CPUs. This means Intel Pentium M (Centrino) CPUs
	169	or 64bit enabled Intel Xeons.
	170
	171	To compile this driver as a module, choose M here: the
	172	module will be called speedstep-centrino.
388d6c51	173
1da177e4	174	For details, take a look at <file:Documentation/cpu-freq/>.
388d6c51	175
1da177e4 LT	176	If in doubt, say N.
1da177e4 LT	177
1da177e4 LT	178	config X86_SPEEDSTEP_CENTRINO_TABLE
1da177e4 LT	179	bool "Built-in tables for Banias CPUs"
e8ef9522	180	depends on X86_32 && X86_SPEEDSTEP_CENTRINO
1da177e4 LT	181	default y
	182	help
	183	Use built-in tables for Banias CPUs if ACPI encoding
	184	is not available.
	185
	186	If in doubt, say N.
	187
	188	config X86_SPEEDSTEP_ICH
	189	tristate "Intel Speedstep on ICH-M chipsets (ioport interface)"
e8ef9522	190	depends on X86_32
1da177e4 LT	191	help
	192	This adds the CPUFreq driver for certain mobile Intel Pentium III
	193	(Coppermine), all mobile Intel Pentium III-M (Tualatin) and all
388d6c51	194	mobile Intel Pentium 4 P4-M on systems which have an Intel ICH2,
1da177e4 LT	195	ICH3 or ICH4 southbridge.
	196
	197	For details, take a look at <file:Documentation/cpu-freq/>.
	198
	199	If in doubt, say N.
	200
	201	config X86_SPEEDSTEP_SMI
	202	tristate "Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface)"
0f194b56	203	depends on X86_32
1da177e4 LT	204	help
1da177e4 LT	205	This adds the CPUFreq driver for certain mobile Intel Pentium III
388d6c51	206	(Coppermine), all mobile Intel Pentium III-M (Tualatin)
1da177e4 LT	207	on systems which have an Intel 440BX/ZX/MX southbridge.
	208
	209	For details, take a look at <file:Documentation/cpu-freq/>.
	210
	211	If in doubt, say N.
	212
	213	config X86_P4_CLOCKMOD
	214	tristate "Intel Pentium 4 clock modulation"
1da177e4 LT	215	help
1da177e4 LT	216	This adds the CPUFreq driver for Intel Pentium 4 / XEON
e8ef9522 SR	217	processors. When enabled it will lower CPU temperature by skipping
	218	clocks.
	219
	220	This driver should be only used in exceptional
	221	circumstances when very low power is needed because it causes severe
	222	slowdowns and noticeable latencies. Normally Speedstep should be used
	223	instead.
	224
	225	To compile this driver as a module, choose M here: the
	226	module will be called p4-clockmod.
1da177e4 LT	227
	228	For details, take a look at <file:Documentation/cpu-freq/>.
	229
e8ef9522	230	Unless you are absolutely sure say N.
1da177e4 LT	231
	232	config X86_CPUFREQ_NFORCE2
	233	tristate "nVidia nForce2 FSB changing"
0f194b56	234	depends on X86_32
1da177e4 LT	235	help
	236	This adds the CPUFreq driver for FSB changing on nVidia nForce2
	237	platforms.
	238
	239	For details, take a look at <file:Documentation/cpu-freq/>.
	240
	241	If in doubt, say N.
	242
	243	config X86_LONGRUN
	244	tristate "Transmeta LongRun"
e8ef9522	245	depends on X86_32
1da177e4 LT	246	help
	247	This adds the CPUFreq driver for Transmeta Crusoe and Efficeon processors
	248	which support LongRun.
	249
	250	For details, take a look at <file:Documentation/cpu-freq/>.
	251
	252	If in doubt, say N.
	253
	254	config X86_LONGHAUL
	255	tristate "VIA Cyrix III Longhaul"
e8ef9522	256	depends on X86_32 && ACPI_PROCESSOR
1da177e4	257	help
388d6c51 DJ	258	This adds the CPUFreq driver for VIA Samuel/CyrixIII,
388d6c51 DJ	259	VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T
1da177e4 LT	260	processors.
	261
	262	For details, take a look at <file:Documentation/cpu-freq/>.
	263
	264	If in doubt, say N.
	265