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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#
Dave Jonesbb0a56e2011-05-19 18:51:07 -04002# x86 CPU Frequency scaling drivers
Linus Torvalds1da177e2005-04-16 15:20:36 -07003#
4
Dirk Brandewie93f08222013-02-06 09:02:13 -08005config X86_INTEL_PSTATE
Dirk Brandewieda0d9fd2013-02-14 22:55:34 +01006 bool "Intel P state control"
Dirk Brandewie93f08222013-02-06 09:02:13 -08007 depends on X86
8 help
9 This driver provides a P state for Intel core processors.
10 The driver implements an internal governor and will become
11 the scaling driver and governor for Sandy bridge processors.
12
Stratos Karafotis735dc242014-04-22 22:40:10 +030013 When this driver is enabled it will become the preferred
Dirk Brandewie93f08222013-02-06 09:02:13 -080014 scaling driver for Sandy bridge processors.
15
Dirk Brandewie93f08222013-02-06 09:02:13 -080016 If in doubt, say N.
17
Naga Chumbalkar0f1d6832009-12-17 20:18:27 +000018config X86_PCC_CPUFREQ
19 tristate "Processor Clocking Control interface driver"
20 depends on ACPI && ACPI_PROCESSOR
21 help
22 This driver adds support for the PCC interface.
23
24 For details, take a look at:
25 <file:Documentation/cpu-freq/pcc-cpufreq.txt>.
26
27 To compile this driver as a module, choose M here: the
28 module will be called pcc-cpufreq.
29
30 If in doubt, say N.
31
Linus Torvalds1da177e2005-04-16 15:20:36 -070032config X86_ACPI_CPUFREQ
33 tristate "ACPI Processor P-States driver"
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 depends on ACPI_PROCESSOR
35 help
36 This driver adds a CPUFreq driver which utilizes the ACPI
37 Processor Performance States.
Matthew Garrett3dc9a632012-09-04 08:28:02 +000038 This driver also supports Intel Enhanced Speedstep and newer
39 AMD CPUs.
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
Sam Ravnborge8ef9522007-11-06 19:35:19 +010041 To compile this driver as a module, choose M here: the
42 module will be called acpi-cpufreq.
43
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 For details, take a look at <file:Documentation/cpu-freq/>.
45
46 If in doubt, say N.
47
Andre Przywara11269ff2012-09-04 08:28:08 +000048config X86_ACPI_CPUFREQ_CPB
49 default y
50 bool "Legacy cpb sysfs knob support for AMD CPUs"
51 depends on X86_ACPI_CPUFREQ && CPU_SUP_AMD
52 help
53 The powernow-k8 driver used to provide a sysfs knob called "cpb"
54 to disable the Core Performance Boosting feature of AMD CPUs. This
Stratos Karafotis735dc242014-04-22 22:40:10 +030055 file has now been superseded by the more generic "boost" entry.
Andre Przywara11269ff2012-09-04 08:28:08 +000056
57 By enabling this option the acpi_cpufreq driver provides the old
58 entry in addition to the new boost ones, for compatibility reasons.
59
Linus Torvalds1da177e2005-04-16 15:20:36 -070060config ELAN_CPUFREQ
Dave Jonesbf6fc9f2005-05-31 19:03:45 -070061 tristate "AMD Elan SC400 and SC410"
Ian Campbellce9c99a2011-04-08 07:42:29 +010062 depends on MELAN
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 ---help---
64 This adds the CPUFreq driver for AMD Elan SC400 and SC410
65 processors.
66
67 You need to specify the processor maximum speed as boot
68 parameter: elanfreq=maxspeed (in kHz) or as module
69 parameter "max_freq".
70
71 For details, take a look at <file:Documentation/cpu-freq/>.
72
73 If in doubt, say N.
74
Dave Jonesbf6fc9f2005-05-31 19:03:45 -070075config SC520_CPUFREQ
76 tristate "AMD Elan SC520"
Ian Campbellce9c99a2011-04-08 07:42:29 +010077 depends on MELAN
Dave Jonesbf6fc9f2005-05-31 19:03:45 -070078 ---help---
79 This adds the CPUFreq driver for AMD Elan SC520 processor.
80
81 For details, take a look at <file:Documentation/cpu-freq/>.
82
83 If in doubt, say N.
84
85
Linus Torvalds1da177e2005-04-16 15:20:36 -070086config X86_POWERNOW_K6
87 tristate "AMD Mobile K6-2/K6-3 PowerNow!"
Sam Ravnborge8ef9522007-11-06 19:35:19 +010088 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 help
90 This adds the CPUFreq driver for mobile AMD K6-2+ and mobile
91 AMD K6-3+ processors.
92
93 For details, take a look at <file:Documentation/cpu-freq/>.
94
95 If in doubt, say N.
96
97config X86_POWERNOW_K7
98 tristate "AMD Mobile Athlon/Duron PowerNow!"
Sam Ravnborge8ef9522007-11-06 19:35:19 +010099 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 help
101 This adds the CPUFreq driver for mobile AMD K7 mobile processors.
102
103 For details, take a look at <file:Documentation/cpu-freq/>.
104
105 If in doubt, say N.
106
107config X86_POWERNOW_K7_ACPI
108 bool
109 depends on X86_POWERNOW_K7 && ACPI_PROCESSOR
110 depends on !(X86_POWERNOW_K7 = y && ACPI_PROCESSOR = m)
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100111 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 default y
113
114config X86_POWERNOW_K8
115 tristate "AMD Opteron/Athlon64 PowerNow!"
Borislav Petkov631e8ac2013-01-18 00:19:37 +0100116 depends on ACPI && ACPI_PROCESSOR && X86_ACPI_CPUFREQ
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 help
Andre Przywara034be8f2012-09-04 08:28:04 +0000118 This adds the CPUFreq driver for K8/early Opteron/Athlon64 processors.
119 Support for K10 and newer processors is now in acpi-cpufreq.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100121 To compile this driver as a module, choose M here: the
122 module will be called powernow-k8.
123
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 For details, take a look at <file:Documentation/cpu-freq/>.
125
Jacob Shin9c5320c2013-04-04 16:19:04 +0000126config X86_AMD_FREQ_SENSITIVITY
127 tristate "AMD frequency sensitivity feedback powersave bias"
128 depends on CPU_FREQ_GOV_ONDEMAND && X86_ACPI_CPUFREQ && CPU_SUP_AMD
129 help
130 This adds AMD-specific powersave bias function to the ondemand
131 governor, which allows it to make more power-conscious frequency
Masanari Iida8c881262013-09-29 20:54:15 +0900132 change decisions based on feedback from hardware (available on AMD
Jacob Shin9c5320c2013-04-04 16:19:04 +0000133 Family 16h and above).
134
135 Hardware feedback tells software how "sensitive" to frequency changes
136 the CPUs' workloads are. CPU-bound workloads will be more sensitive
137 -- they will perform better as frequency increases. Memory/IO-bound
138 workloads will be less sensitive -- they will not necessarily perform
139 better as frequency increases.
140
141 If in doubt, say N.
142
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143config X86_GX_SUSPMOD
144 tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100145 depends on X86_32 && PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 help
147 This add the CPUFreq driver for NatSemi Geode processors which
148 support suspend modulation.
149
150 For details, take a look at <file:Documentation/cpu-freq/>.
151
152 If in doubt, say N.
153
154config X86_SPEEDSTEP_CENTRINO
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100155 tristate "Intel Enhanced SpeedStep (deprecated)"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100156 select X86_SPEEDSTEP_CENTRINO_TABLE if X86_32
157 depends on X86_32 || (X86_64 && ACPI_PROCESSOR)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 help
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100159 This is deprecated and this functionality is now merged into
160 acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of
161 speedstep_centrino.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 This adds the CPUFreq driver for Enhanced SpeedStep enabled
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100163 mobile CPUs. This means Intel Pentium M (Centrino) CPUs
164 or 64bit enabled Intel Xeons.
165
166 To compile this driver as a module, choose M here: the
167 module will be called speedstep-centrino.
Dave Jones388d6c52006-03-11 16:04:53 -0500168
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 For details, take a look at <file:Documentation/cpu-freq/>.
Dave Jones388d6c52006-03-11 16:04:53 -0500170
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 If in doubt, say N.
172
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173config X86_SPEEDSTEP_CENTRINO_TABLE
174 bool "Built-in tables for Banias CPUs"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100175 depends on X86_32 && X86_SPEEDSTEP_CENTRINO
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 default y
177 help
178 Use built-in tables for Banias CPUs if ACPI encoding
179 is not available.
180
181 If in doubt, say N.
182
183config X86_SPEEDSTEP_ICH
184 tristate "Intel Speedstep on ICH-M chipsets (ioport interface)"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100185 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 help
187 This adds the CPUFreq driver for certain mobile Intel Pentium III
188 (Coppermine), all mobile Intel Pentium III-M (Tualatin) and all
Dave Jones388d6c52006-03-11 16:04:53 -0500189 mobile Intel Pentium 4 P4-M on systems which have an Intel ICH2,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 ICH3 or ICH4 southbridge.
191
192 For details, take a look at <file:Documentation/cpu-freq/>.
193
194 If in doubt, say N.
195
196config X86_SPEEDSTEP_SMI
197 tristate "Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface)"
Kees Cook0f194b52012-10-02 11:16:53 -0700198 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 help
200 This adds the CPUFreq driver for certain mobile Intel Pentium III
Dave Jones388d6c52006-03-11 16:04:53 -0500201 (Coppermine), all mobile Intel Pentium III-M (Tualatin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 on systems which have an Intel 440BX/ZX/MX southbridge.
203
204 For details, take a look at <file:Documentation/cpu-freq/>.
205
206 If in doubt, say N.
207
208config X86_P4_CLOCKMOD
209 tristate "Intel Pentium 4 clock modulation"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 help
211 This adds the CPUFreq driver for Intel Pentium 4 / XEON
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100212 processors. When enabled it will lower CPU temperature by skipping
213 clocks.
214
215 This driver should be only used in exceptional
216 circumstances when very low power is needed because it causes severe
217 slowdowns and noticeable latencies. Normally Speedstep should be used
218 instead.
219
220 To compile this driver as a module, choose M here: the
221 module will be called p4-clockmod.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
223 For details, take a look at <file:Documentation/cpu-freq/>.
224
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100225 Unless you are absolutely sure say N.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
227config X86_CPUFREQ_NFORCE2
228 tristate "nVidia nForce2 FSB changing"
Kees Cook0f194b52012-10-02 11:16:53 -0700229 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 help
231 This adds the CPUFreq driver for FSB changing on nVidia nForce2
232 platforms.
233
234 For details, take a look at <file:Documentation/cpu-freq/>.
235
236 If in doubt, say N.
237
238config X86_LONGRUN
239 tristate "Transmeta LongRun"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100240 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 help
242 This adds the CPUFreq driver for Transmeta Crusoe and Efficeon processors
243 which support LongRun.
244
245 For details, take a look at <file:Documentation/cpu-freq/>.
246
247 If in doubt, say N.
248
249config X86_LONGHAUL
250 tristate "VIA Cyrix III Longhaul"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100251 depends on X86_32 && ACPI_PROCESSOR
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 help
Dave Jones388d6c52006-03-11 16:04:53 -0500253 This adds the CPUFreq driver for VIA Samuel/CyrixIII,
254 VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 processors.
256
257 For details, take a look at <file:Documentation/cpu-freq/>.
258
259 If in doubt, say N.
260
Rafa³ Bilski86acd492007-02-05 19:57:25 +0100261config X86_E_POWERSAVER
Harald Welte0fea6152009-06-08 18:29:36 +0800262 tristate "VIA C7 Enhanced PowerSaver (DANGEROUS)"
Rafał Bilskib5f14722013-05-19 19:27:55 +0000263 depends on X86_32 && ACPI_PROCESSOR
Rafa³ Bilski86acd492007-02-05 19:57:25 +0100264 help
Harald Welte0fea6152009-06-08 18:29:36 +0800265 This adds the CPUFreq driver for VIA C7 processors. However, this driver
266 does not have any safeguards to prevent operating the CPU out of spec
267 and is thus considered dangerous. Please use the regular ACPI cpufreq
268 driver, enabled by CONFIG_X86_ACPI_CPUFREQ.
Rafa³ Bilski86acd492007-02-05 19:57:25 +0100269
270 If in doubt, say N.
271
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272comment "shared options"
273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274config X86_SPEEDSTEP_LIB
275 tristate
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100276 default (X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
278config X86_SPEEDSTEP_RELAXED_CAP_CHECK
279 bool "Relaxed speedstep capability checks"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100280 depends on X86_32 && (X86_SPEEDSTEP_SMI || X86_SPEEDSTEP_ICH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 help
Dave Jones388d6c52006-03-11 16:04:53 -0500282 Don't perform all checks for a speedstep capable system which would
283 normally be done. Some ancient or strange systems, though speedstep
284 capable, don't always indicate that they are speedstep capable. This
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 option lets the probing code bypass some of those checks if the
286 parameter "relaxed_check=1" is passed to the module.
287