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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
13 When this driver is enabled it will become the perferred
14 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"
34 select CPU_FREQ_TABLE
35 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
56 file has now been superseeded by the more generic "boost" entry.
57
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070061config ELAN_CPUFREQ
Dave Jonesbf6fc9f2005-05-31 19:03:45 -070062 tristate "AMD Elan SC400 and SC410"
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 select CPU_FREQ_TABLE
Ian Campbellce9c99a2011-04-08 07:42:29 +010064 depends on MELAN
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 ---help---
66 This adds the CPUFreq driver for AMD Elan SC400 and SC410
67 processors.
68
69 You need to specify the processor maximum speed as boot
70 parameter: elanfreq=maxspeed (in kHz) or as module
71 parameter "max_freq".
72
73 For details, take a look at <file:Documentation/cpu-freq/>.
74
75 If in doubt, say N.
76
Dave Jonesbf6fc9f2005-05-31 19:03:45 -070077config SC520_CPUFREQ
78 tristate "AMD Elan SC520"
79 select CPU_FREQ_TABLE
Ian Campbellce9c99a2011-04-08 07:42:29 +010080 depends on MELAN
Dave Jonesbf6fc9f2005-05-31 19:03:45 -070081 ---help---
82 This adds the CPUFreq driver for AMD Elan SC520 processor.
83
84 For details, take a look at <file:Documentation/cpu-freq/>.
85
86 If in doubt, say N.
87
88
Linus Torvalds1da177e2005-04-16 15:20:36 -070089config X86_POWERNOW_K6
90 tristate "AMD Mobile K6-2/K6-3 PowerNow!"
91 select CPU_FREQ_TABLE
Sam Ravnborge8ef9522007-11-06 19:35:19 +010092 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 help
94 This adds the CPUFreq driver for mobile AMD K6-2+ and mobile
95 AMD K6-3+ processors.
96
97 For details, take a look at <file:Documentation/cpu-freq/>.
98
99 If in doubt, say N.
100
101config X86_POWERNOW_K7
102 tristate "AMD Mobile Athlon/Duron PowerNow!"
103 select CPU_FREQ_TABLE
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100104 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 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
112config X86_POWERNOW_K7_ACPI
113 bool
114 depends on X86_POWERNOW_K7 && ACPI_PROCESSOR
115 depends on !(X86_POWERNOW_K7 = y && ACPI_PROCESSOR = m)
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100116 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 default y
118
119config X86_POWERNOW_K8
120 tristate "AMD Opteron/Athlon64 PowerNow!"
121 select CPU_FREQ_TABLE
Borislav Petkov631e8ac2013-01-18 00:19:37 +0100122 depends on ACPI && ACPI_PROCESSOR && X86_ACPI_CPUFREQ
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 help
Andre Przywara034be8f2012-09-04 08:28:04 +0000124 This adds the CPUFreq driver for K8/early Opteron/Athlon64 processors.
125 Support for K10 and newer processors is now in acpi-cpufreq.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100127 To compile this driver as a module, choose M here: the
128 module will be called powernow-k8.
129
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 For details, take a look at <file:Documentation/cpu-freq/>.
131
Jacob Shin9c5320c2013-04-04 16:19:04 +0000132config X86_AMD_FREQ_SENSITIVITY
133 tristate "AMD frequency sensitivity feedback powersave bias"
134 depends on CPU_FREQ_GOV_ONDEMAND && X86_ACPI_CPUFREQ && CPU_SUP_AMD
135 help
136 This adds AMD-specific powersave bias function to the ondemand
137 governor, which allows it to make more power-conscious frequency
138 change decisions based on feedback from hardware (availble on AMD
139 Family 16h and above).
140
141 Hardware feedback tells software how "sensitive" to frequency changes
142 the CPUs' workloads are. CPU-bound workloads will be more sensitive
143 -- they will perform better as frequency increases. Memory/IO-bound
144 workloads will be less sensitive -- they will not necessarily perform
145 better as frequency increases.
146
147 If in doubt, say N.
148
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149config X86_GX_SUSPMOD
150 tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100151 depends on X86_32 && PCI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 help
153 This add the CPUFreq driver for NatSemi Geode processors which
154 support suspend modulation.
155
156 For details, take a look at <file:Documentation/cpu-freq/>.
157
158 If in doubt, say N.
159
160config X86_SPEEDSTEP_CENTRINO
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100161 tristate "Intel Enhanced SpeedStep (deprecated)"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 select CPU_FREQ_TABLE
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100163 select X86_SPEEDSTEP_CENTRINO_TABLE if X86_32
164 depends on X86_32 || (X86_64 && ACPI_PROCESSOR)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 help
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100166 This is deprecated and this functionality is now merged into
167 acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of
168 speedstep_centrino.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 This adds the CPUFreq driver for Enhanced SpeedStep enabled
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100170 mobile CPUs. This means Intel Pentium M (Centrino) CPUs
171 or 64bit enabled Intel Xeons.
172
173 To compile this driver as a module, choose M here: the
174 module will be called speedstep-centrino.
Dave Jones388d6c52006-03-11 16:04:53 -0500175
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 For details, take a look at <file:Documentation/cpu-freq/>.
Dave Jones388d6c52006-03-11 16:04:53 -0500177
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 If in doubt, say N.
179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180config X86_SPEEDSTEP_CENTRINO_TABLE
181 bool "Built-in tables for Banias CPUs"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100182 depends on X86_32 && X86_SPEEDSTEP_CENTRINO
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 default y
184 help
185 Use built-in tables for Banias CPUs if ACPI encoding
186 is not available.
187
188 If in doubt, say N.
189
190config X86_SPEEDSTEP_ICH
191 tristate "Intel Speedstep on ICH-M chipsets (ioport interface)"
192 select CPU_FREQ_TABLE
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100193 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 help
195 This adds the CPUFreq driver for certain mobile Intel Pentium III
196 (Coppermine), all mobile Intel Pentium III-M (Tualatin) and all
Dave Jones388d6c52006-03-11 16:04:53 -0500197 mobile Intel Pentium 4 P4-M on systems which have an Intel ICH2,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 ICH3 or ICH4 southbridge.
199
200 For details, take a look at <file:Documentation/cpu-freq/>.
201
202 If in doubt, say N.
203
204config X86_SPEEDSTEP_SMI
205 tristate "Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface)"
206 select CPU_FREQ_TABLE
Kees Cook0f194b52012-10-02 11:16:53 -0700207 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 help
209 This adds the CPUFreq driver for certain mobile Intel Pentium III
Dave Jones388d6c52006-03-11 16:04:53 -0500210 (Coppermine), all mobile Intel Pentium III-M (Tualatin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 on systems which have an Intel 440BX/ZX/MX southbridge.
212
213 For details, take a look at <file:Documentation/cpu-freq/>.
214
215 If in doubt, say N.
216
217config X86_P4_CLOCKMOD
218 tristate "Intel Pentium 4 clock modulation"
219 select CPU_FREQ_TABLE
220 help
221 This adds the CPUFreq driver for Intel Pentium 4 / XEON
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100222 processors. When enabled it will lower CPU temperature by skipping
223 clocks.
224
225 This driver should be only used in exceptional
226 circumstances when very low power is needed because it causes severe
227 slowdowns and noticeable latencies. Normally Speedstep should be used
228 instead.
229
230 To compile this driver as a module, choose M here: the
231 module will be called p4-clockmod.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
233 For details, take a look at <file:Documentation/cpu-freq/>.
234
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100235 Unless you are absolutely sure say N.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
237config X86_CPUFREQ_NFORCE2
238 tristate "nVidia nForce2 FSB changing"
Kees Cook0f194b52012-10-02 11:16:53 -0700239 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 help
241 This adds the CPUFreq driver for FSB changing on nVidia nForce2
242 platforms.
243
244 For details, take a look at <file:Documentation/cpu-freq/>.
245
246 If in doubt, say N.
247
248config X86_LONGRUN
249 tristate "Transmeta LongRun"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100250 depends on X86_32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 help
252 This adds the CPUFreq driver for Transmeta Crusoe and Efficeon processors
253 which support LongRun.
254
255 For details, take a look at <file:Documentation/cpu-freq/>.
256
257 If in doubt, say N.
258
259config X86_LONGHAUL
260 tristate "VIA Cyrix III Longhaul"
261 select CPU_FREQ_TABLE
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)"
Rafa³ Bilski86acd492007-02-05 19:57:25 +0100274 select CPU_FREQ_TABLE
Kees Cook0f194b52012-10-02 11:16:53 -0700275 depends on X86_32
Rafa³ Bilski86acd492007-02-05 19:57:25 +0100276 help
Harald Welte0fea6152009-06-08 18:29:36 +0800277 This adds the CPUFreq driver for VIA C7 processors. However, this driver
278 does not have any safeguards to prevent operating the CPU out of spec
279 and is thus considered dangerous. Please use the regular ACPI cpufreq
280 driver, enabled by CONFIG_X86_ACPI_CPUFREQ.
Rafa³ Bilski86acd492007-02-05 19:57:25 +0100281
282 If in doubt, say N.
283
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284comment "shared options"
285
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286config X86_SPEEDSTEP_LIB
287 tristate
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100288 default (X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
290config X86_SPEEDSTEP_RELAXED_CAP_CHECK
291 bool "Relaxed speedstep capability checks"
Sam Ravnborge8ef9522007-11-06 19:35:19 +0100292 depends on X86_32 && (X86_SPEEDSTEP_SMI || X86_SPEEDSTEP_ICH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 help
Dave Jones388d6c52006-03-11 16:04:53 -0500294 Don't perform all checks for a speedstep capable system which would
295 normally be done. Some ancient or strange systems, though speedstep
296 capable, don't always indicate that they are speedstep capable. This
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 option lets the probing code bypass some of those checks if the
298 parameter "relaxed_check=1" is passed to the module.
299