Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | # |
Dave Jones | bb0a56e | 2011-05-19 18:51:07 -0400 | [diff] [blame] | 2 | # x86 CPU Frequency scaling drivers |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | # |
| 4 | |
Dirk Brandewie | 93f0822 | 2013-02-06 09:02:13 -0800 | [diff] [blame^] | 5 | config X86_INTEL_PSTATE |
| 6 | tristate "Intel P state control" |
| 7 | 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 | |
| 16 | Note: This driver should be built with the same settings as |
| 17 | the other scaling drivers configured into the system |
| 18 | (module/built-in) in order for the driver to register itself |
| 19 | as the scaling driver on the system. |
| 20 | |
| 21 | If in doubt, say N. |
| 22 | |
Naga Chumbalkar | 0f1d683 | 2009-12-17 20:18:27 +0000 | [diff] [blame] | 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: |
| 30 | <file:Documentation/cpu-freq/pcc-cpufreq.txt>. |
| 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | config X86_ACPI_CPUFREQ |
| 38 | tristate "ACPI Processor P-States driver" |
| 39 | select CPU_FREQ_TABLE |
| 40 | depends on ACPI_PROCESSOR |
| 41 | help |
| 42 | This driver adds a CPUFreq driver which utilizes the ACPI |
| 43 | Processor Performance States. |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 44 | This driver also supports Intel Enhanced Speedstep and newer |
| 45 | AMD CPUs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 47 | To compile this driver as a module, choose M here: the |
| 48 | module will be called acpi-cpufreq. |
| 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 51 | |
| 52 | If in doubt, say N. |
| 53 | |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 54 | config X86_ACPI_CPUFREQ_CPB |
| 55 | default y |
| 56 | bool "Legacy cpb sysfs knob support for AMD CPUs" |
| 57 | depends on X86_ACPI_CPUFREQ && CPU_SUP_AMD |
| 58 | help |
| 59 | The powernow-k8 driver used to provide a sysfs knob called "cpb" |
| 60 | to disable the Core Performance Boosting feature of AMD CPUs. This |
| 61 | file has now been superseeded by the more generic "boost" entry. |
| 62 | |
| 63 | By enabling this option the acpi_cpufreq driver provides the old |
| 64 | entry in addition to the new boost ones, for compatibility reasons. |
| 65 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | config ELAN_CPUFREQ |
Dave Jones | bf6fc9f | 2005-05-31 19:03:45 -0700 | [diff] [blame] | 67 | tristate "AMD Elan SC400 and SC410" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | select CPU_FREQ_TABLE |
Ian Campbell | ce9c99a | 2011-04-08 07:42:29 +0100 | [diff] [blame] | 69 | depends on MELAN |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | ---help--- |
| 71 | This adds the CPUFreq driver for AMD Elan SC400 and SC410 |
| 72 | processors. |
| 73 | |
| 74 | You need to specify the processor maximum speed as boot |
| 75 | parameter: elanfreq=maxspeed (in kHz) or as module |
| 76 | parameter "max_freq". |
| 77 | |
| 78 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 79 | |
| 80 | If in doubt, say N. |
| 81 | |
Dave Jones | bf6fc9f | 2005-05-31 19:03:45 -0700 | [diff] [blame] | 82 | config SC520_CPUFREQ |
| 83 | tristate "AMD Elan SC520" |
| 84 | select CPU_FREQ_TABLE |
Ian Campbell | ce9c99a | 2011-04-08 07:42:29 +0100 | [diff] [blame] | 85 | depends on MELAN |
Dave Jones | bf6fc9f | 2005-05-31 19:03:45 -0700 | [diff] [blame] | 86 | ---help--- |
| 87 | This adds the CPUFreq driver for AMD Elan SC520 processor. |
| 88 | |
| 89 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 90 | |
| 91 | If in doubt, say N. |
| 92 | |
| 93 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | config X86_POWERNOW_K6 |
| 95 | tristate "AMD Mobile K6-2/K6-3 PowerNow!" |
| 96 | select CPU_FREQ_TABLE |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 97 | depends on X86_32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | help |
| 99 | This adds the CPUFreq driver for mobile AMD K6-2+ and mobile |
| 100 | AMD K6-3+ processors. |
| 101 | |
| 102 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 103 | |
| 104 | If in doubt, say N. |
| 105 | |
| 106 | config X86_POWERNOW_K7 |
| 107 | tristate "AMD Mobile Athlon/Duron PowerNow!" |
| 108 | select CPU_FREQ_TABLE |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 109 | depends on X86_32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | help |
| 111 | This adds the CPUFreq driver for mobile AMD K7 mobile processors. |
| 112 | |
| 113 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 114 | |
| 115 | If in doubt, say N. |
| 116 | |
| 117 | config X86_POWERNOW_K7_ACPI |
| 118 | bool |
| 119 | depends on X86_POWERNOW_K7 && ACPI_PROCESSOR |
| 120 | depends on !(X86_POWERNOW_K7 = y && ACPI_PROCESSOR = m) |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 121 | depends on X86_32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | default y |
| 123 | |
| 124 | config X86_POWERNOW_K8 |
| 125 | tristate "AMD Opteron/Athlon64 PowerNow!" |
| 126 | select CPU_FREQ_TABLE |
Borislav Petkov | 631e8ac | 2013-01-18 00:19:37 +0100 | [diff] [blame] | 127 | depends on ACPI && ACPI_PROCESSOR && X86_ACPI_CPUFREQ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | help |
Andre Przywara | 034be8f | 2012-09-04 08:28:04 +0000 | [diff] [blame] | 129 | This adds the CPUFreq driver for K8/early Opteron/Athlon64 processors. |
| 130 | Support for K10 and newer processors is now in acpi-cpufreq. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 132 | To compile this driver as a module, choose M here: the |
| 133 | module will be called powernow-k8. |
| 134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | config X86_GX_SUSPMOD |
| 138 | tristate "Cyrix MediaGX/NatSemi Geode Suspend Modulation" |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 139 | depends on X86_32 && PCI |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | help |
| 141 | This add the CPUFreq driver for NatSemi Geode processors which |
| 142 | support suspend modulation. |
| 143 | |
| 144 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 145 | |
| 146 | If in doubt, say N. |
| 147 | |
| 148 | config X86_SPEEDSTEP_CENTRINO |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 149 | tristate "Intel Enhanced SpeedStep (deprecated)" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | select CPU_FREQ_TABLE |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 151 | select X86_SPEEDSTEP_CENTRINO_TABLE if X86_32 |
| 152 | depends on X86_32 || (X86_64 && ACPI_PROCESSOR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | help |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 154 | This is deprecated and this functionality is now merged into |
| 155 | acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of |
| 156 | speedstep_centrino. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | This adds the CPUFreq driver for Enhanced SpeedStep enabled |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 158 | mobile CPUs. This means Intel Pentium M (Centrino) CPUs |
| 159 | or 64bit enabled Intel Xeons. |
| 160 | |
| 161 | To compile this driver as a module, choose M here: the |
| 162 | module will be called speedstep-centrino. |
Dave Jones | 388d6c5 | 2006-03-11 16:04:53 -0500 | [diff] [blame] | 163 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | For details, take a look at <file:Documentation/cpu-freq/>. |
Dave Jones | 388d6c5 | 2006-03-11 16:04:53 -0500 | [diff] [blame] | 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | If in doubt, say N. |
| 167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | config X86_SPEEDSTEP_CENTRINO_TABLE |
| 169 | bool "Built-in tables for Banias CPUs" |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 170 | depends on X86_32 && X86_SPEEDSTEP_CENTRINO |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | default y |
| 172 | help |
| 173 | Use built-in tables for Banias CPUs if ACPI encoding |
| 174 | is not available. |
| 175 | |
| 176 | If in doubt, say N. |
| 177 | |
| 178 | config X86_SPEEDSTEP_ICH |
| 179 | tristate "Intel Speedstep on ICH-M chipsets (ioport interface)" |
| 180 | select CPU_FREQ_TABLE |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 181 | depends on X86_32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | help |
| 183 | This adds the CPUFreq driver for certain mobile Intel Pentium III |
| 184 | (Coppermine), all mobile Intel Pentium III-M (Tualatin) and all |
Dave Jones | 388d6c5 | 2006-03-11 16:04:53 -0500 | [diff] [blame] | 185 | mobile Intel Pentium 4 P4-M on systems which have an Intel ICH2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | ICH3 or ICH4 southbridge. |
| 187 | |
| 188 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 189 | |
| 190 | If in doubt, say N. |
| 191 | |
| 192 | config X86_SPEEDSTEP_SMI |
| 193 | tristate "Intel SpeedStep on 440BX/ZX/MX chipsets (SMI interface)" |
| 194 | select CPU_FREQ_TABLE |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 195 | depends on X86_32 && EXPERIMENTAL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | help |
| 197 | This adds the CPUFreq driver for certain mobile Intel Pentium III |
Dave Jones | 388d6c5 | 2006-03-11 16:04:53 -0500 | [diff] [blame] | 198 | (Coppermine), all mobile Intel Pentium III-M (Tualatin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | on systems which have an Intel 440BX/ZX/MX southbridge. |
| 200 | |
| 201 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 202 | |
| 203 | If in doubt, say N. |
| 204 | |
| 205 | config X86_P4_CLOCKMOD |
| 206 | tristate "Intel Pentium 4 clock modulation" |
| 207 | select CPU_FREQ_TABLE |
| 208 | help |
| 209 | This adds the CPUFreq driver for Intel Pentium 4 / XEON |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 210 | processors. When enabled it will lower CPU temperature by skipping |
| 211 | clocks. |
| 212 | |
| 213 | This driver should be only used in exceptional |
| 214 | circumstances when very low power is needed because it causes severe |
| 215 | slowdowns and noticeable latencies. Normally Speedstep should be used |
| 216 | instead. |
| 217 | |
| 218 | To compile this driver as a module, choose M here: the |
| 219 | module will be called p4-clockmod. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | |
| 221 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 222 | |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 223 | Unless you are absolutely sure say N. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | |
| 225 | config X86_CPUFREQ_NFORCE2 |
| 226 | tristate "nVidia nForce2 FSB changing" |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 227 | depends on X86_32 && EXPERIMENTAL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | help |
| 229 | This adds the CPUFreq driver for FSB changing on nVidia nForce2 |
| 230 | platforms. |
| 231 | |
| 232 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 233 | |
| 234 | If in doubt, say N. |
| 235 | |
| 236 | config X86_LONGRUN |
| 237 | tristate "Transmeta LongRun" |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 238 | depends on X86_32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | help |
| 240 | This adds the CPUFreq driver for Transmeta Crusoe and Efficeon processors |
| 241 | which support LongRun. |
| 242 | |
| 243 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 244 | |
| 245 | If in doubt, say N. |
| 246 | |
| 247 | config X86_LONGHAUL |
| 248 | tristate "VIA Cyrix III Longhaul" |
| 249 | select CPU_FREQ_TABLE |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 250 | depends on X86_32 && ACPI_PROCESSOR |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | help |
Dave Jones | 388d6c5 | 2006-03-11 16:04:53 -0500 | [diff] [blame] | 252 | This adds the CPUFreq driver for VIA Samuel/CyrixIII, |
| 253 | VIA Cyrix Samuel/C3, VIA Cyrix Ezra and VIA Cyrix Ezra-T |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | processors. |
| 255 | |
| 256 | For details, take a look at <file:Documentation/cpu-freq/>. |
| 257 | |
| 258 | If in doubt, say N. |
| 259 | |
Rafa³ Bilski | 86acd49 | 2007-02-05 19:57:25 +0100 | [diff] [blame] | 260 | config X86_E_POWERSAVER |
Harald Welte | 0fea615 | 2009-06-08 18:29:36 +0800 | [diff] [blame] | 261 | tristate "VIA C7 Enhanced PowerSaver (DANGEROUS)" |
Rafa³ Bilski | 86acd49 | 2007-02-05 19:57:25 +0100 | [diff] [blame] | 262 | select CPU_FREQ_TABLE |
Harald Welte | 0fea615 | 2009-06-08 18:29:36 +0800 | [diff] [blame] | 263 | depends on X86_32 && EXPERIMENTAL |
Rafa³ Bilski | 86acd49 | 2007-02-05 19:57:25 +0100 | [diff] [blame] | 264 | help |
Harald Welte | 0fea615 | 2009-06-08 18:29:36 +0800 | [diff] [blame] | 265 | 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 Bilski | 86acd49 | 2007-02-05 19:57:25 +0100 | [diff] [blame] | 269 | |
| 270 | If in doubt, say N. |
| 271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | comment "shared options" |
| 273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | config X86_SPEEDSTEP_LIB |
| 275 | tristate |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 276 | default (X86_SPEEDSTEP_ICH || X86_SPEEDSTEP_SMI || X86_P4_CLOCKMOD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
| 278 | config X86_SPEEDSTEP_RELAXED_CAP_CHECK |
| 279 | bool "Relaxed speedstep capability checks" |
Sam Ravnborg | e8ef952 | 2007-11-06 19:35:19 +0100 | [diff] [blame] | 280 | depends on X86_32 && (X86_SPEEDSTEP_SMI || X86_SPEEDSTEP_ICH) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | help |
Dave Jones | 388d6c5 | 2006-03-11 16:04:53 -0500 | [diff] [blame] | 282 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | option lets the probing code bypass some of those checks if the |
| 286 | parameter "relaxed_check=1" is passed to the module. |
| 287 | |