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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
Srinivas Pandruvada9522a2f2016-04-27 15:48:06 -07008 select ACPI_PROCESSOR if ACPI
Dirk Brandewie93f08222013-02-06 09:02:13 -08009 help
10 This driver provides a P state for Intel core processors.
11 The driver implements an internal governor and will become
12 the scaling driver and governor for Sandy bridge processors.
13
Stratos Karafotis735dc242014-04-22 22:40:10 +030014 When this driver is enabled it will become the preferred
Dirk Brandewie93f08222013-02-06 09:02:13 -080015 scaling driver for Sandy bridge processors.
16
Dirk Brandewie93f08222013-02-06 09:02:13 -080017 If in doubt, say N.
18
Naga Chumbalkar0f1d6832009-12-17 20:18:27 +000019config X86_PCC_CPUFREQ
20 tristate "Processor Clocking Control interface driver"
21 depends on ACPI && ACPI_PROCESSOR
22 help
23 This driver adds support for the PCC interface.
24
25 For details, take a look at:
26 <file:Documentation/cpu-freq/pcc-cpufreq.txt>.
27
28 To compile this driver as a module, choose M here: the
29 module will be called pcc-cpufreq.
30
31 If in doubt, say N.
32
Linus Torvalds1da177e2005-04-16 15:20:36 -070033config X86_ACPI_CPUFREQ
34 tristate "ACPI Processor P-States driver"
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 depends on ACPI_PROCESSOR
36 help
37 This driver adds a CPUFreq driver which utilizes the ACPI
38 Processor Performance States.
Matthew Garrett3dc9a632012-09-04 08:28:02 +000039 This driver also supports Intel Enhanced Speedstep and newer
40 AMD CPUs.
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Sam Ravnborge8ef9522007-11-06 19:35:19 +010042 To compile this driver as a module, choose M here: the
43 module will be called acpi-cpufreq.
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 For details, take a look at <file:Documentation/cpu-freq/>.
46
47 If in doubt, say N.
48
Andre Przywara11269ff2012-09-04 08:28:08 +000049config X86_ACPI_CPUFREQ_CPB
50 default y
51 bool "Legacy cpb sysfs knob support for AMD CPUs"
52 depends on X86_ACPI_CPUFREQ && CPU_SUP_AMD
53 help
54 The powernow-k8 driver used to provide a sysfs knob called "cpb"
55 to disable the Core Performance Boosting feature of AMD CPUs. This
Stratos Karafotis735dc242014-04-22 22:40:10 +030056 file has now been superseded by the more generic "boost" entry.
Andre Przywara11269ff2012-09-04 08:28:08 +000057
58 By enabling this option the acpi_cpufreq driver provides the old
59 entry in addition to the new boost ones, for compatibility reasons.
60
Srinidhi Kasagare7ddf4b2014-12-19 23:13:51 +053061config X86_SFI_CPUFREQ
62 tristate "SFI Performance-States driver"
63 depends on X86_INTEL_MID && SFI
64 help
65 This adds a CPUFreq driver for some Silvermont based Intel Atom
66 architectures like Z34xx and Z35xx which enumerate processor
67 performance states through SFI.
68
69 If in doubt, say N.
70
Linus Torvalds1da177e2005-04-16 15:20:36 -070071config ELAN_CPUFREQ
Dave Jonesbf6fc9f2005-05-31 19:03:45 -070072 tristate "AMD Elan SC400 and SC410"
Ian Campbellce9c99a2011-04-08 07:42:29 +010073 depends on MELAN
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 ---help---
75 This adds the CPUFreq driver for AMD Elan SC400 and SC410
76 processors.
77
78 You need to specify the processor maximum speed as boot
79 parameter: elanfreq=maxspeed (in kHz) or as module
80 parameter "max_freq".
81
82 For details, take a look at <file:Documentation/cpu-freq/>.
83
84 If in doubt, say N.
85
Dave Jonesbf6fc9f2005-05-31 19:03:45 -070086config SC520_CPUFREQ
87 tristate "AMD Elan SC520"
Ian Campbellce9c99a2011-04-08 07:42:29 +010088 depends on MELAN
Dave Jonesbf6fc9f2005-05-31 19:03:45 -070089 ---help---
90 This adds the CPUFreq driver for AMD Elan SC520 processor.
91
92 For details, take a look at <file:Documentation/cpu-freq/>.
93
94 If in doubt, say N.
95
96
Linus Torvalds1da177e2005-04-16 15:20:36 -070097config X86_POWERNOW_K6
98 tristate "AMD Mobile K6-2/K6-3 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 K6-2+ and mobile
102 AMD K6-3+ processors.
103
104 For details, take a look at <file:Documentation/cpu-freq/>.
105
106 If in doubt, say N.
107
108config X86_POWERNOW_K7
109 tristate "AMD Mobile Athlon/Duron PowerNow!"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100110 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 help
112 This adds the CPUFreq driver for mobile AMD K7 mobile processors.
113
114 For details, take a look at <file:Documentation/cpu-freq/>.
115
116 If in doubt, say N.
117
118config X86_POWERNOW_K7_ACPI
119 bool
120 depends on X86_POWERNOW_K7 && ACPI_PROCESSOR
121 depends on !(X86_POWERNOW_K7 = y && ACPI_PROCESSOR = m)
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100122 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 default y
124
125config X86_POWERNOW_K8
126 tristate "AMD Opteron/Athlon64 PowerNow!"
Borislav Petkov631e8ac2013-01-18 00:19:37 +0100127 depends on ACPI && ACPI_PROCESSOR && X86_ACPI_CPUFREQ
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 help
Andre Przywara034be8f2012-09-04 08:28:04 +0000129 This adds the CPUFreq driver for K8/early Opteron/Athlon64 processors.
130 Support for K10 and newer processors is now in acpi-cpufreq.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100132 To compile this driver as a module, choose M here: the
133 module will be called powernow-k8.
134
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 For details, take a look at <file:Documentation/cpu-freq/>.
136
Jacob Shin9c5320c2013-04-04 16:19:04 +0000137config X86_AMD_FREQ_SENSITIVITY
138 tristate "AMD frequency sensitivity feedback powersave bias"
139 depends on CPU_FREQ_GOV_ONDEMAND && X86_ACPI_CPUFREQ && CPU_SUP_AMD
140 help
141 This adds AMD-specific powersave bias function to the ondemand
142 governor, which allows it to make more power-conscious frequency
Masanari Iida8c881262013-09-29 20:54:15 +0900143 change decisions based on feedback from hardware (available on AMD
Jacob Shin9c5320c2013-04-04 16:19:04 +0000144 Family 16h and above).
145
146 Hardware feedback tells software how "sensitive" to frequency changes
147 the CPUs' workloads are. CPU-bound workloads will be more sensitive
148 -- they will perform better as frequency increases. Memory/IO-bound
149 workloads will be less sensitive -- they will not necessarily perform
150 better as frequency increases.
151
152 If in doubt, say N.
153
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154config X86_GX_SUSPMOD
155 tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100156 depends on X86_32 && PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 help
158 This add the CPUFreq driver for NatSemi Geode processors which
159 support suspend modulation.
160
161 For details, take a look at <file:Documentation/cpu-freq/>.
162
163 If in doubt, say N.
164
165config X86_SPEEDSTEP_CENTRINO
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100166 tristate "Intel Enhanced SpeedStep (deprecated)"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100167 select X86_SPEEDSTEP_CENTRINO_TABLE if X86_32
168 depends on X86_32 || (X86_64 && ACPI_PROCESSOR)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 help
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100170 This is deprecated and this functionality is now merged into
171 acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of
172 speedstep_centrino.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 This adds the CPUFreq driver for Enhanced SpeedStep enabled
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100174 mobile CPUs. This means Intel Pentium M (Centrino) CPUs
175 or 64bit enabled Intel Xeons.
176
177 To compile this driver as a module, choose M here: the
178 module will be called speedstep-centrino.
Dave Jones388d6c52006-03-11 16:04:53 -0500179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 For details, take a look at <file:Documentation/cpu-freq/>.
Dave Jones388d6c52006-03-11 16:04:53 -0500181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 If in doubt, say N.
183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184config X86_SPEEDSTEP_CENTRINO_TABLE
185 bool "Built-in tables for Banias CPUs"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100186 depends on X86_32 && X86_SPEEDSTEP_CENTRINO
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 default y
188 help
189 Use built-in tables for Banias CPUs if ACPI encoding
190 is not available.
191
192 If in doubt, say N.
193
194config X86_SPEEDSTEP_ICH
195 tristate "Intel Speedstep on ICH-M chipsets (ioport interface)"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100196 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 help
198 This adds the CPUFreq driver for certain mobile Intel Pentium III
199 (Coppermine), all mobile Intel Pentium III-M (Tualatin) and all
Dave Jones388d6c52006-03-11 16:04:53 -0500200 mobile Intel Pentium 4 P4-M on systems which have an Intel ICH2,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 ICH3 or ICH4 southbridge.
202
203 For details, take a look at <file:Documentation/cpu-freq/>.
204
205 If in doubt, say N.
206
207config X86_SPEEDSTEP_SMI
208 tristate "Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface)"
Kees Cook0f194b52012-10-02 11:16:53 -0700209 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 help
211 This adds the CPUFreq driver for certain mobile Intel Pentium III
Dave Jones388d6c52006-03-11 16:04:53 -0500212 (Coppermine), all mobile Intel Pentium III-M (Tualatin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 on systems which have an Intel 440BX/ZX/MX southbridge.
214
215 For details, take a look at <file:Documentation/cpu-freq/>.
216
217 If in doubt, say N.
218
219config X86_P4_CLOCKMOD
220 tristate "Intel Pentium 4 clock modulation"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 help
222 This adds the CPUFreq driver for Intel Pentium 4 / XEON
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100223 processors. When enabled it will lower CPU temperature by skipping
224 clocks.
225
226 This driver should be only used in exceptional
227 circumstances when very low power is needed because it causes severe
228 slowdowns and noticeable latencies. Normally Speedstep should be used
229 instead.
230
231 To compile this driver as a module, choose M here: the
232 module will be called p4-clockmod.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
234 For details, take a look at <file:Documentation/cpu-freq/>.
235
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100236 Unless you are absolutely sure say N.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237
238config X86_CPUFREQ_NFORCE2
239 tristate "nVidia nForce2 FSB changing"
Kees Cook0f194b52012-10-02 11:16:53 -0700240 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 help
242 This adds the CPUFreq driver for FSB changing on nVidia nForce2
243 platforms.
244
245 For details, take a look at <file:Documentation/cpu-freq/>.
246
247 If in doubt, say N.
248
249config X86_LONGRUN
250 tristate "Transmeta LongRun"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100251 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 help
253 This adds the CPUFreq driver for Transmeta Crusoe and Efficeon processors
254 which support LongRun.
255
256 For details, take a look at <file:Documentation/cpu-freq/>.
257
258 If in doubt, say N.
259
260config X86_LONGHAUL
261 tristate "VIA Cyrix III Longhaul"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100262 depends on X86_32 && ACPI_PROCESSOR
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 help
Dave Jones388d6c52006-03-11 16:04:53 -0500264 This adds the CPUFreq driver for VIA Samuel/CyrixIII,
265 VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 processors.
267
268 For details, take a look at <file:Documentation/cpu-freq/>.
269
270 If in doubt, say N.
271
Rafa³ Bilski86acd492007-02-05 19:57:25 +0100272config X86_E_POWERSAVER
Harald Welte0fea6152009-06-08 18:29:36 +0800273 tristate "VIA C7 Enhanced PowerSaver (DANGEROUS)"
Rafał Bilskib5f14722013-05-19 19:27:55 +0000274 depends on X86_32 && ACPI_PROCESSOR
Rafa³ Bilski86acd492007-02-05 19:57:25 +0100275 help
Harald Welte0fea6152009-06-08 18:29:36 +0800276 This adds the CPUFreq driver for VIA C7 processors. However, this driver
277 does not have any safeguards to prevent operating the CPU out of spec
278 and is thus considered dangerous. Please use the regular ACPI cpufreq
279 driver, enabled by CONFIG_X86_ACPI_CPUFREQ.
Rafa³ Bilski86acd492007-02-05 19:57:25 +0100280
281 If in doubt, say N.
282
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283comment "shared options"
284
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285config X86_SPEEDSTEP_LIB
286 tristate
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100287 default (X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
289config X86_SPEEDSTEP_RELAXED_CAP_CHECK
290 bool "Relaxed speedstep capability checks"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100291 depends on X86_32 && (X86_SPEEDSTEP_SMI || X86_SPEEDSTEP_ICH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 help
Dave Jones388d6c52006-03-11 16:04:53 -0500293 Don't perform all checks for a speedstep capable system which would
294 normally be done. Some ancient or strange systems, though speedstep
295 capable, don't always indicate that they are speedstep capable. This
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 option lets the probing code bypass some of those checks if the
297 parameter "relaxed_check=1" is passed to the module.
298