Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 2 | * acpi-cpufreq.c - ACPI Processor P-States Driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| 5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 6 | * Copyright (C) 2002 - 2004 Dominik Brodowski <linux@brodo.de> |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 7 | * Copyright (C) 2006 Denis Sadykov <denis.m.sadykov@intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
| 9 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or (at |
| 14 | * your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, but |
| 17 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 19 | * General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License along |
| 22 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 23 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 24 | * |
| 25 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 26 | */ |
| 27 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/kernel.h> |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/init.h> |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 31 | #include <linux/smp.h> |
| 32 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/cpufreq.h> |
Venkatesh Pallipadi | d395bf1 | 2005-08-25 15:59:00 -0400 | [diff] [blame] | 34 | #include <linux/compiler.h> |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 35 | #include <linux/dmi.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 36 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
| 38 | #include <linux/acpi.h> |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 39 | #include <linux/io.h> |
| 40 | #include <linux/delay.h> |
| 41 | #include <linux/uaccess.h> |
| 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <acpi/processor.h> |
| 44 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 45 | #include <asm/msr.h> |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 46 | #include <asm/processor.h> |
| 47 | #include <asm/cpufeature.h> |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 48 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | MODULE_AUTHOR("Paul Diefenbaugh, Dominik Brodowski"); |
| 50 | MODULE_DESCRIPTION("ACPI Processor P-States Driver"); |
| 51 | MODULE_LICENSE("GPL"); |
| 52 | |
Andre Przywara | acd3162 | 2012-09-04 08:28:03 +0000 | [diff] [blame] | 53 | #define PFX "acpi-cpufreq: " |
| 54 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 55 | enum { |
| 56 | UNDEFINED_CAPABLE = 0, |
| 57 | SYSTEM_INTEL_MSR_CAPABLE, |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 58 | SYSTEM_AMD_MSR_CAPABLE, |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 59 | SYSTEM_IO_CAPABLE, |
| 60 | }; |
| 61 | |
| 62 | #define INTEL_MSR_RANGE (0xffff) |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 63 | #define AMD_MSR_RANGE (0x7) |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 64 | |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 65 | #define MSR_K7_HWCR_CPB_DIS (1ULL << 25) |
| 66 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 67 | struct acpi_cpufreq_data { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 68 | struct cpufreq_frequency_table *freq_table; |
| 69 | unsigned int resume; |
| 70 | unsigned int cpu_feature; |
Pan Xinhui | 8cfcfd3 | 2015-07-10 14:36:20 +0800 | [diff] [blame] | 71 | unsigned int acpi_perf_cpu; |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 72 | cpumask_var_t freqdomain_cpus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | }; |
| 74 | |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 75 | /* acpi_perf_data is a pointer to percpu data. */ |
Namhyung Kim | 3f6c4df | 2010-08-13 23:00:11 +0900 | [diff] [blame] | 76 | static struct acpi_processor_performance __percpu *acpi_perf_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 78 | static inline struct acpi_processor_performance *to_perf_data(struct acpi_cpufreq_data *data) |
| 79 | { |
| 80 | return per_cpu_ptr(acpi_perf_data, data->acpi_perf_cpu); |
| 81 | } |
| 82 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | static struct cpufreq_driver acpi_cpufreq_driver; |
| 84 | |
Venkatesh Pallipadi | d395bf1 | 2005-08-25 15:59:00 -0400 | [diff] [blame] | 85 | static unsigned int acpi_pstate_strict; |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 86 | static struct msr __percpu *msrs; |
| 87 | |
| 88 | static bool boost_state(unsigned int cpu) |
| 89 | { |
| 90 | u32 lo, hi; |
| 91 | u64 msr; |
| 92 | |
| 93 | switch (boot_cpu_data.x86_vendor) { |
| 94 | case X86_VENDOR_INTEL: |
| 95 | rdmsr_on_cpu(cpu, MSR_IA32_MISC_ENABLE, &lo, &hi); |
| 96 | msr = lo | ((u64)hi << 32); |
| 97 | return !(msr & MSR_IA32_MISC_ENABLE_TURBO_DISABLE); |
| 98 | case X86_VENDOR_AMD: |
| 99 | rdmsr_on_cpu(cpu, MSR_K7_HWCR, &lo, &hi); |
| 100 | msr = lo | ((u64)hi << 32); |
| 101 | return !(msr & MSR_K7_HWCR_CPB_DIS); |
| 102 | } |
| 103 | return false; |
| 104 | } |
| 105 | |
| 106 | static void boost_set_msrs(bool enable, const struct cpumask *cpumask) |
| 107 | { |
| 108 | u32 cpu; |
| 109 | u32 msr_addr; |
| 110 | u64 msr_mask; |
| 111 | |
| 112 | switch (boot_cpu_data.x86_vendor) { |
| 113 | case X86_VENDOR_INTEL: |
| 114 | msr_addr = MSR_IA32_MISC_ENABLE; |
| 115 | msr_mask = MSR_IA32_MISC_ENABLE_TURBO_DISABLE; |
| 116 | break; |
| 117 | case X86_VENDOR_AMD: |
| 118 | msr_addr = MSR_K7_HWCR; |
| 119 | msr_mask = MSR_K7_HWCR_CPB_DIS; |
| 120 | break; |
| 121 | default: |
| 122 | return; |
| 123 | } |
| 124 | |
| 125 | rdmsr_on_cpus(cpumask, msr_addr, msrs); |
| 126 | |
| 127 | for_each_cpu(cpu, cpumask) { |
| 128 | struct msr *reg = per_cpu_ptr(msrs, cpu); |
| 129 | if (enable) |
| 130 | reg->q &= ~msr_mask; |
| 131 | else |
| 132 | reg->q |= msr_mask; |
| 133 | } |
| 134 | |
| 135 | wrmsr_on_cpus(cpumask, msr_addr, msrs); |
| 136 | } |
| 137 | |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 138 | static int _store_boost(int val) |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 139 | { |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 140 | get_online_cpus(); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 141 | boost_set_msrs(val, cpu_online_mask); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 142 | put_online_cpus(); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 143 | pr_debug("Core Boosting %sabled.\n", val ? "en" : "dis"); |
| 144 | |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 145 | return 0; |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 146 | } |
| 147 | |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 148 | static ssize_t show_freqdomain_cpus(struct cpufreq_policy *policy, char *buf) |
| 149 | { |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 150 | struct acpi_cpufreq_data *data = policy->driver_data; |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 151 | |
Srinivas Pandruvada | e253036 | 2015-10-07 13:50:43 -0700 | [diff] [blame] | 152 | if (unlikely(!data)) |
| 153 | return -ENODEV; |
| 154 | |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 155 | return cpufreq_show_cpus(data->freqdomain_cpus, buf); |
| 156 | } |
| 157 | |
| 158 | cpufreq_freq_attr_ro(freqdomain_cpus); |
| 159 | |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 160 | #ifdef CONFIG_X86_ACPI_CPUFREQ_CPB |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 161 | static ssize_t store_boost(const char *buf, size_t count) |
| 162 | { |
| 163 | int ret; |
| 164 | unsigned long val = 0; |
| 165 | |
| 166 | if (!acpi_cpufreq_driver.boost_supported) |
| 167 | return -EINVAL; |
| 168 | |
| 169 | ret = kstrtoul(buf, 10, &val); |
| 170 | if (ret || (val > 1)) |
| 171 | return -EINVAL; |
| 172 | |
| 173 | _store_boost((int) val); |
| 174 | |
| 175 | return count; |
| 176 | } |
| 177 | |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 178 | static ssize_t store_cpb(struct cpufreq_policy *policy, const char *buf, |
| 179 | size_t count) |
| 180 | { |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 181 | return store_boost(buf, count); |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | static ssize_t show_cpb(struct cpufreq_policy *policy, char *buf) |
| 185 | { |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 186 | return sprintf(buf, "%u\n", acpi_cpufreq_driver.boost_enabled); |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 187 | } |
| 188 | |
Lan Tianyu | 59027d3 | 2013-08-13 10:05:53 +0800 | [diff] [blame] | 189 | cpufreq_freq_attr_rw(cpb); |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 190 | #endif |
| 191 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 192 | static int check_est_cpu(unsigned int cpuid) |
| 193 | { |
Mike Travis | 92cb761 | 2007-10-19 20:35:04 +0200 | [diff] [blame] | 194 | struct cpuinfo_x86 *cpu = &cpu_data(cpuid); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 195 | |
Harald Welte | 0de5108 | 2009-06-08 18:27:54 +0800 | [diff] [blame] | 196 | return cpu_has(cpu, X86_FEATURE_EST); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 197 | } |
| 198 | |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 199 | static int check_amd_hwpstate_cpu(unsigned int cpuid) |
| 200 | { |
| 201 | struct cpuinfo_x86 *cpu = &cpu_data(cpuid); |
| 202 | |
| 203 | return cpu_has(cpu, X86_FEATURE_HW_PSTATE); |
| 204 | } |
| 205 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 206 | static unsigned extract_io(u32 value, struct acpi_cpufreq_data *data) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 207 | { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 208 | struct acpi_processor_performance *perf; |
| 209 | int i; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 210 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 211 | perf = to_perf_data(data); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 212 | |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 213 | for (i = 0; i < perf->state_count; i++) { |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 214 | if (value == perf->states[i].status) |
| 215 | return data->freq_table[i].frequency; |
| 216 | } |
| 217 | return 0; |
| 218 | } |
| 219 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 220 | static unsigned extract_msr(u32 msr, struct acpi_cpufreq_data *data) |
| 221 | { |
Stratos Karafotis | 041526f | 2014-04-25 23:15:38 +0300 | [diff] [blame] | 222 | struct cpufreq_frequency_table *pos; |
Venkatesh Pallipadi | a6f6e6e6 | 2006-10-03 12:37:42 -0700 | [diff] [blame] | 223 | struct acpi_processor_performance *perf; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 224 | |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 225 | if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) |
| 226 | msr &= AMD_MSR_RANGE; |
| 227 | else |
| 228 | msr &= INTEL_MSR_RANGE; |
| 229 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 230 | perf = to_perf_data(data); |
Venkatesh Pallipadi | a6f6e6e6 | 2006-10-03 12:37:42 -0700 | [diff] [blame] | 231 | |
Stratos Karafotis | 041526f | 2014-04-25 23:15:38 +0300 | [diff] [blame] | 232 | cpufreq_for_each_entry(pos, data->freq_table) |
| 233 | if (msr == perf->states[pos->driver_data].status) |
| 234 | return pos->frequency; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 235 | return data->freq_table[0].frequency; |
| 236 | } |
| 237 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 238 | static unsigned extract_freq(u32 val, struct acpi_cpufreq_data *data) |
| 239 | { |
| 240 | switch (data->cpu_feature) { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 241 | case SYSTEM_INTEL_MSR_CAPABLE: |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 242 | case SYSTEM_AMD_MSR_CAPABLE: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 243 | return extract_msr(val, data); |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 244 | case SYSTEM_IO_CAPABLE: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 245 | return extract_io(val, data); |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 246 | default: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 247 | return 0; |
| 248 | } |
| 249 | } |
| 250 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 251 | struct msr_addr { |
| 252 | u32 reg; |
| 253 | }; |
| 254 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 255 | struct io_addr { |
| 256 | u16 port; |
| 257 | u8 bit_width; |
| 258 | }; |
| 259 | |
| 260 | struct drv_cmd { |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 261 | unsigned int type; |
Ingo Molnar | bfa318a | 2009-01-15 15:46:08 +0100 | [diff] [blame] | 262 | const struct cpumask *mask; |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 263 | union { |
| 264 | struct msr_addr msr; |
| 265 | struct io_addr io; |
| 266 | } addr; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 267 | u32 val; |
| 268 | }; |
| 269 | |
Andrew Morton | 01599fc | 2009-04-13 10:27:49 -0700 | [diff] [blame] | 270 | /* Called via smp_call_function_single(), on the target CPU */ |
| 271 | static void do_drv_read(void *_cmd) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 272 | { |
Mike Travis | 7285908 | 2009-01-16 15:31:15 -0800 | [diff] [blame] | 273 | struct drv_cmd *cmd = _cmd; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 274 | u32 h; |
| 275 | |
| 276 | switch (cmd->type) { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 277 | case SYSTEM_INTEL_MSR_CAPABLE: |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 278 | case SYSTEM_AMD_MSR_CAPABLE: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 279 | rdmsr(cmd->addr.msr.reg, cmd->val, h); |
| 280 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 281 | case SYSTEM_IO_CAPABLE: |
Venkatesh Pallipadi | 4e581ff | 2006-12-13 10:41:16 -0800 | [diff] [blame] | 282 | acpi_os_read_port((acpi_io_address)cmd->addr.io.port, |
| 283 | &cmd->val, |
| 284 | (u32)cmd->addr.io.bit_width); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 285 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 286 | default: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 287 | break; |
| 288 | } |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 289 | } |
| 290 | |
Andrew Morton | 01599fc | 2009-04-13 10:27:49 -0700 | [diff] [blame] | 291 | /* Called via smp_call_function_many(), on the target CPUs */ |
| 292 | static void do_drv_write(void *_cmd) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 293 | { |
Mike Travis | 7285908 | 2009-01-16 15:31:15 -0800 | [diff] [blame] | 294 | struct drv_cmd *cmd = _cmd; |
Venki Pallipadi | 13424f6 | 2007-05-23 15:42:13 -0700 | [diff] [blame] | 295 | u32 lo, hi; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 296 | |
| 297 | switch (cmd->type) { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 298 | case SYSTEM_INTEL_MSR_CAPABLE: |
Venki Pallipadi | 13424f6 | 2007-05-23 15:42:13 -0700 | [diff] [blame] | 299 | rdmsr(cmd->addr.msr.reg, lo, hi); |
| 300 | lo = (lo & ~INTEL_MSR_RANGE) | (cmd->val & INTEL_MSR_RANGE); |
| 301 | wrmsr(cmd->addr.msr.reg, lo, hi); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 302 | break; |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 303 | case SYSTEM_AMD_MSR_CAPABLE: |
| 304 | wrmsr(cmd->addr.msr.reg, cmd->val, 0); |
| 305 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 306 | case SYSTEM_IO_CAPABLE: |
Venkatesh Pallipadi | 4e581ff | 2006-12-13 10:41:16 -0800 | [diff] [blame] | 307 | acpi_os_write_port((acpi_io_address)cmd->addr.io.port, |
| 308 | cmd->val, |
| 309 | (u32)cmd->addr.io.bit_width); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 310 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 311 | default: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 312 | break; |
| 313 | } |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 314 | } |
| 315 | |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 316 | static void drv_read(struct drv_cmd *cmd) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 317 | { |
Andrew Morton | 4a28395 | 2009-12-21 16:19:58 -0800 | [diff] [blame] | 318 | int err; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 319 | cmd->val = 0; |
| 320 | |
Andrew Morton | 4a28395 | 2009-12-21 16:19:58 -0800 | [diff] [blame] | 321 | err = smp_call_function_any(cmd->mask, do_drv_read, cmd, 1); |
| 322 | WARN_ON_ONCE(err); /* smp_call_function_any() was buggy? */ |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | static void drv_write(struct drv_cmd *cmd) |
| 326 | { |
Linus Torvalds | ea34f43 | 2009-04-15 08:05:13 -0700 | [diff] [blame] | 327 | int this_cpu; |
| 328 | |
| 329 | this_cpu = get_cpu(); |
| 330 | if (cpumask_test_cpu(this_cpu, cmd->mask)) |
| 331 | do_drv_write(cmd); |
Andrew Morton | 01599fc | 2009-04-13 10:27:49 -0700 | [diff] [blame] | 332 | smp_call_function_many(cmd->mask, do_drv_write, cmd, 1); |
Linus Torvalds | ea34f43 | 2009-04-15 08:05:13 -0700 | [diff] [blame] | 333 | put_cpu(); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 334 | } |
| 335 | |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 336 | static u32 |
| 337 | get_cur_val(const struct cpumask *mask, struct acpi_cpufreq_data *data) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 338 | { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 339 | struct acpi_processor_performance *perf; |
| 340 | struct drv_cmd cmd; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 341 | |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 342 | if (unlikely(cpumask_empty(mask))) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 343 | return 0; |
| 344 | |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 345 | switch (data->cpu_feature) { |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 346 | case SYSTEM_INTEL_MSR_CAPABLE: |
| 347 | cmd.type = SYSTEM_INTEL_MSR_CAPABLE; |
Ross Lagerwall | 8673b83 | 2013-05-31 20:45:17 +0100 | [diff] [blame] | 348 | cmd.addr.msr.reg = MSR_IA32_PERF_CTL; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 349 | break; |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 350 | case SYSTEM_AMD_MSR_CAPABLE: |
| 351 | cmd.type = SYSTEM_AMD_MSR_CAPABLE; |
Ross Lagerwall | 8673b83 | 2013-05-31 20:45:17 +0100 | [diff] [blame] | 352 | cmd.addr.msr.reg = MSR_AMD_PERF_CTL; |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 353 | break; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 354 | case SYSTEM_IO_CAPABLE: |
| 355 | cmd.type = SYSTEM_IO_CAPABLE; |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 356 | perf = to_perf_data(data); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 357 | cmd.addr.io.port = perf->control_register.address; |
| 358 | cmd.addr.io.bit_width = perf->control_register.bit_width; |
| 359 | break; |
| 360 | default: |
| 361 | return 0; |
| 362 | } |
| 363 | |
Ingo Molnar | bfa318a | 2009-01-15 15:46:08 +0100 | [diff] [blame] | 364 | cmd.mask = mask; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 365 | drv_read(&cmd); |
| 366 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 367 | pr_debug("get_cur_val = %u\n", cmd.val); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 368 | |
| 369 | return cmd.val; |
| 370 | } |
| 371 | |
| 372 | static unsigned int get_cur_freq_on_cpu(unsigned int cpu) |
| 373 | { |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 374 | struct acpi_cpufreq_data *data; |
| 375 | struct cpufreq_policy *policy; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 376 | unsigned int freq; |
Venkatesh Pallipadi | e56a727 | 2008-04-28 15:13:43 -0400 | [diff] [blame] | 377 | unsigned int cached_freq; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 378 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 379 | pr_debug("get_cur_freq_on_cpu (%d)\n", cpu); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 380 | |
Rafael J. Wysocki | 1f0bd44 | 2015-09-16 02:17:49 +0200 | [diff] [blame] | 381 | policy = cpufreq_cpu_get_raw(cpu); |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 382 | if (unlikely(!policy)) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 383 | return 0; |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 384 | |
| 385 | data = policy->driver_data; |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 386 | if (unlikely(!data || !data->freq_table)) |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 387 | return 0; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 388 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 389 | cached_freq = data->freq_table[to_perf_data(data)->state].frequency; |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 390 | freq = extract_freq(get_cur_val(cpumask_of(cpu), data), data); |
Venkatesh Pallipadi | e56a727 | 2008-04-28 15:13:43 -0400 | [diff] [blame] | 391 | if (freq != cached_freq) { |
| 392 | /* |
| 393 | * The dreaded BIOS frequency change behind our back. |
| 394 | * Force set the frequency on next target call. |
| 395 | */ |
| 396 | data->resume = 1; |
| 397 | } |
| 398 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 399 | pr_debug("cur freq = %u\n", freq); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 400 | |
| 401 | return freq; |
| 402 | } |
| 403 | |
Mike Travis | 7285908 | 2009-01-16 15:31:15 -0800 | [diff] [blame] | 404 | static unsigned int check_freqs(const struct cpumask *mask, unsigned int freq, |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 405 | struct acpi_cpufreq_data *data) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 406 | { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 407 | unsigned int cur_freq; |
| 408 | unsigned int i; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 409 | |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 410 | for (i = 0; i < 100; i++) { |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 411 | cur_freq = extract_freq(get_cur_val(mask, data), data); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 412 | if (cur_freq == freq) |
| 413 | return 1; |
| 414 | udelay(10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | } |
| 416 | return 0; |
| 417 | } |
| 418 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 419 | static int acpi_cpufreq_target(struct cpufreq_policy *policy, |
Viresh Kumar | 9c0ebcf | 2013-10-25 19:45:48 +0530 | [diff] [blame] | 420 | unsigned int index) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | { |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 422 | struct acpi_cpufreq_data *data = policy->driver_data; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 423 | struct acpi_processor_performance *perf; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 424 | struct drv_cmd cmd; |
Venkatesh Pallipadi | 8edc59d9 | 2006-12-19 12:58:55 -0800 | [diff] [blame] | 425 | unsigned int next_perf_state = 0; /* Index into perf table */ |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 426 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 428 | if (unlikely(data == NULL || data->freq_table == NULL)) { |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 429 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | } |
| 431 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 432 | perf = to_perf_data(data); |
Viresh Kumar | 9c0ebcf | 2013-10-25 19:45:48 +0530 | [diff] [blame] | 433 | next_perf_state = data->freq_table[index].driver_data; |
Venkatesh Pallipadi | 7650b28 | 2006-10-03 12:36:30 -0700 | [diff] [blame] | 434 | if (perf->state == next_perf_state) { |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 435 | if (unlikely(data->resume)) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 436 | pr_debug("Called after resume, resetting to P%d\n", |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 437 | next_perf_state); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 438 | data->resume = 0; |
| 439 | } else { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 440 | pr_debug("Already at target state (P%d)\n", |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 441 | next_perf_state); |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 442 | goto out; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 443 | } |
| 444 | } |
| 445 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 446 | switch (data->cpu_feature) { |
| 447 | case SYSTEM_INTEL_MSR_CAPABLE: |
| 448 | cmd.type = SYSTEM_INTEL_MSR_CAPABLE; |
| 449 | cmd.addr.msr.reg = MSR_IA32_PERF_CTL; |
Venki Pallipadi | 13424f6 | 2007-05-23 15:42:13 -0700 | [diff] [blame] | 450 | cmd.val = (u32) perf->states[next_perf_state].control; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 451 | break; |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 452 | case SYSTEM_AMD_MSR_CAPABLE: |
| 453 | cmd.type = SYSTEM_AMD_MSR_CAPABLE; |
| 454 | cmd.addr.msr.reg = MSR_AMD_PERF_CTL; |
| 455 | cmd.val = (u32) perf->states[next_perf_state].control; |
| 456 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 457 | case SYSTEM_IO_CAPABLE: |
| 458 | cmd.type = SYSTEM_IO_CAPABLE; |
| 459 | cmd.addr.io.port = perf->control_register.address; |
| 460 | cmd.addr.io.bit_width = perf->control_register.bit_width; |
| 461 | cmd.val = (u32) perf->states[next_perf_state].control; |
| 462 | break; |
| 463 | default: |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 464 | result = -ENODEV; |
| 465 | goto out; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 466 | } |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 467 | |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 468 | /* cpufreq holds the hotplug lock, so we are safe from here on */ |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 469 | if (policy->shared_type != CPUFREQ_SHARED_TYPE_ANY) |
Ingo Molnar | bfa318a | 2009-01-15 15:46:08 +0100 | [diff] [blame] | 470 | cmd.mask = policy->cpus; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 471 | else |
Ingo Molnar | bfa318a | 2009-01-15 15:46:08 +0100 | [diff] [blame] | 472 | cmd.mask = cpumask_of(policy->cpu); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 473 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 474 | drv_write(&cmd); |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 475 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 476 | if (acpi_pstate_strict) { |
Viresh Kumar | d4019f0 | 2013-08-14 19:38:24 +0530 | [diff] [blame] | 477 | if (!check_freqs(cmd.mask, data->freq_table[index].frequency, |
| 478 | data)) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 479 | pr_debug("acpi_cpufreq_target failed (%d)\n", |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 480 | policy->cpu); |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 481 | result = -EAGAIN; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 482 | } |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 483 | } |
| 484 | |
Viresh Kumar | e15d830 | 2013-06-19 14:22:55 +0530 | [diff] [blame] | 485 | if (!result) |
| 486 | perf->state = next_perf_state; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 487 | |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 488 | out: |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 489 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | } |
| 491 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | static unsigned long |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 493 | acpi_cpufreq_guess_freq(struct acpi_cpufreq_data *data, unsigned int cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | { |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 495 | struct acpi_processor_performance *perf; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 496 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 497 | perf = to_perf_data(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | if (cpu_khz) { |
| 499 | /* search the closest match to cpu_khz */ |
| 500 | unsigned int i; |
| 501 | unsigned long freq; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 502 | unsigned long freqn = perf->states[0].core_frequency * 1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 504 | for (i = 0; i < (perf->state_count-1); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | freq = freqn; |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 506 | freqn = perf->states[i+1].core_frequency * 1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | if ((2 * cpu_khz) > (freqn + freq)) { |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 508 | perf->state = i; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 509 | return freq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | } |
| 511 | } |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 512 | perf->state = perf->state_count-1; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 513 | return freqn; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 514 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | /* assume CPU is at P0... */ |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 516 | perf->state = 0; |
| 517 | return perf->states[0].core_frequency * 1000; |
| 518 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | } |
| 520 | |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 521 | static void free_acpi_perf_data(void) |
| 522 | { |
| 523 | unsigned int i; |
| 524 | |
| 525 | /* Freeing a NULL pointer is OK, and alloc_percpu zeroes. */ |
| 526 | for_each_possible_cpu(i) |
| 527 | free_cpumask_var(per_cpu_ptr(acpi_perf_data, i) |
| 528 | ->shared_cpu_map); |
| 529 | free_percpu(acpi_perf_data); |
| 530 | } |
| 531 | |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 532 | static int boost_notify(struct notifier_block *nb, unsigned long action, |
| 533 | void *hcpu) |
| 534 | { |
| 535 | unsigned cpu = (long)hcpu; |
| 536 | const struct cpumask *cpumask; |
| 537 | |
| 538 | cpumask = get_cpu_mask(cpu); |
| 539 | |
| 540 | /* |
| 541 | * Clear the boost-disable bit on the CPU_DOWN path so that |
| 542 | * this cpu cannot block the remaining ones from boosting. On |
| 543 | * the CPU_UP path we simply keep the boost-disable flag in |
| 544 | * sync with the current global state. |
| 545 | */ |
| 546 | |
| 547 | switch (action) { |
| 548 | case CPU_UP_PREPARE: |
| 549 | case CPU_UP_PREPARE_FROZEN: |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 550 | boost_set_msrs(acpi_cpufreq_driver.boost_enabled, cpumask); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 551 | break; |
| 552 | |
| 553 | case CPU_DOWN_PREPARE: |
| 554 | case CPU_DOWN_PREPARE_FROZEN: |
| 555 | boost_set_msrs(1, cpumask); |
| 556 | break; |
| 557 | |
| 558 | default: |
| 559 | break; |
| 560 | } |
| 561 | |
| 562 | return NOTIFY_OK; |
| 563 | } |
| 564 | |
| 565 | |
| 566 | static struct notifier_block boost_nb = { |
| 567 | .notifier_call = boost_notify, |
| 568 | }; |
| 569 | |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 570 | /* |
| 571 | * acpi_cpufreq_early_init - initialize ACPI P-States library |
| 572 | * |
| 573 | * Initialize the ACPI P-States library (drivers/acpi/processor_perflib.c) |
| 574 | * in order to determine correct frequency and voltage pairings. We can |
| 575 | * do _PDC and _PSD and find out the processor dependency for the |
| 576 | * actual init that will happen later... |
| 577 | */ |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 578 | static int __init acpi_cpufreq_early_init(void) |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 579 | { |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 580 | unsigned int i; |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 581 | pr_debug("acpi_cpufreq_early_init\n"); |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 582 | |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 583 | acpi_perf_data = alloc_percpu(struct acpi_processor_performance); |
| 584 | if (!acpi_perf_data) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 585 | pr_debug("Memory allocation error for acpi_perf_data.\n"); |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 586 | return -ENOMEM; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 587 | } |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 588 | for_each_possible_cpu(i) { |
Yinghai Lu | eaa9584 | 2009-06-06 14:51:36 -0700 | [diff] [blame] | 589 | if (!zalloc_cpumask_var_node( |
Mike Travis | 80855f7 | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 590 | &per_cpu_ptr(acpi_perf_data, i)->shared_cpu_map, |
| 591 | GFP_KERNEL, cpu_to_node(i))) { |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 592 | |
| 593 | /* Freeing a NULL pointer is OK: alloc_percpu zeroes. */ |
| 594 | free_acpi_perf_data(); |
| 595 | return -ENOMEM; |
| 596 | } |
| 597 | } |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 598 | |
| 599 | /* Do initialization in ACPI core */ |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 600 | acpi_processor_preregister_performance(acpi_perf_data); |
| 601 | return 0; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 602 | } |
| 603 | |
Dave Jones | 95625b8 | 2006-10-21 01:37:39 -0400 | [diff] [blame] | 604 | #ifdef CONFIG_SMP |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 605 | /* |
| 606 | * Some BIOSes do SW_ANY coordination internally, either set it up in hw |
| 607 | * or do it in BIOS firmware and won't inform about it to OS. If not |
| 608 | * detected, this has a side effect of making CPU run at a different speed |
| 609 | * than OS intended it to run at. Detect it and handle it cleanly. |
| 610 | */ |
| 611 | static int bios_with_sw_any_bug; |
| 612 | |
Jeff Garzik | 1855256 | 2007-10-03 15:15:40 -0400 | [diff] [blame] | 613 | static int sw_any_bug_found(const struct dmi_system_id *d) |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 614 | { |
| 615 | bios_with_sw_any_bug = 1; |
| 616 | return 0; |
| 617 | } |
| 618 | |
Jeff Garzik | 1855256 | 2007-10-03 15:15:40 -0400 | [diff] [blame] | 619 | static const struct dmi_system_id sw_any_bug_dmi_table[] = { |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 620 | { |
| 621 | .callback = sw_any_bug_found, |
| 622 | .ident = "Supermicro Server X6DLP", |
| 623 | .matches = { |
| 624 | DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"), |
| 625 | DMI_MATCH(DMI_BIOS_VERSION, "080010"), |
| 626 | DMI_MATCH(DMI_PRODUCT_NAME, "X6DLP"), |
| 627 | }, |
| 628 | }, |
| 629 | { } |
| 630 | }; |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 631 | |
| 632 | static int acpi_cpufreq_blacklist(struct cpuinfo_x86 *c) |
| 633 | { |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 634 | /* Intel Xeon Processor 7100 Series Specification Update |
| 635 | * http://www.intel.com/Assets/PDF/specupdate/314554.pdf |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 636 | * AL30: A Machine Check Exception (MCE) Occurring during an |
| 637 | * Enhanced Intel SpeedStep Technology Ratio Change May Cause |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 638 | * Both Processor Cores to Lock Up. */ |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 639 | if (c->x86_vendor == X86_VENDOR_INTEL) { |
| 640 | if ((c->x86 == 15) && |
| 641 | (c->x86_model == 6) && |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 642 | (c->x86_mask == 8)) { |
| 643 | printk(KERN_INFO "acpi-cpufreq: Intel(R) " |
| 644 | "Xeon(R) 7100 Errata AL30, processors may " |
| 645 | "lock up on frequency changes: disabling " |
| 646 | "acpi-cpufreq.\n"); |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 647 | return -ENODEV; |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 648 | } |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 649 | } |
| 650 | return 0; |
| 651 | } |
Dave Jones | 95625b8 | 2006-10-21 01:37:39 -0400 | [diff] [blame] | 652 | #endif |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 653 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 654 | static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 656 | unsigned int i; |
| 657 | unsigned int valid_states = 0; |
| 658 | unsigned int cpu = policy->cpu; |
| 659 | struct acpi_cpufreq_data *data; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 660 | unsigned int result = 0; |
Mike Travis | 92cb761 | 2007-10-19 20:35:04 +0200 | [diff] [blame] | 661 | struct cpuinfo_x86 *c = &cpu_data(policy->cpu); |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 662 | struct acpi_processor_performance *perf; |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 663 | #ifdef CONFIG_SMP |
| 664 | static int blacklisted; |
| 665 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 667 | pr_debug("acpi_cpufreq_cpu_init\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 669 | #ifdef CONFIG_SMP |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 670 | if (blacklisted) |
| 671 | return blacklisted; |
| 672 | blacklisted = acpi_cpufreq_blacklist(c); |
| 673 | if (blacklisted) |
| 674 | return blacklisted; |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 675 | #endif |
| 676 | |
Viresh Kumar | d5b73cd | 2013-08-06 22:53:06 +0530 | [diff] [blame] | 677 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | if (!data) |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 679 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 681 | if (!zalloc_cpumask_var(&data->freqdomain_cpus, GFP_KERNEL)) { |
| 682 | result = -ENOMEM; |
| 683 | goto err_free; |
| 684 | } |
| 685 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 686 | perf = per_cpu_ptr(acpi_perf_data, cpu); |
Pan Xinhui | 8cfcfd3 | 2015-07-10 14:36:20 +0800 | [diff] [blame] | 687 | data->acpi_perf_cpu = cpu; |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 688 | policy->driver_data = data; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 689 | |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 690 | if (cpu_has(c, X86_FEATURE_CONSTANT_TSC)) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 691 | acpi_cpufreq_driver.flags |= CPUFREQ_CONST_LOOPS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 693 | result = acpi_processor_register_performance(perf, cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | if (result) |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 695 | goto err_free_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 697 | policy->shared_type = perf->shared_type; |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 698 | |
Venkatesh Pallipadi | 46f18e3 | 2006-06-26 00:34:43 -0400 | [diff] [blame] | 699 | /* |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 700 | * Will let policy->cpus know about dependency only when software |
Venkatesh Pallipadi | 46f18e3 | 2006-06-26 00:34:43 -0400 | [diff] [blame] | 701 | * coordination is required. |
| 702 | */ |
| 703 | if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL || |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 704 | policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) { |
Rusty Russell | 835481d | 2009-01-04 05:18:06 -0800 | [diff] [blame] | 705 | cpumask_copy(policy->cpus, perf->shared_cpu_map); |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 706 | } |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 707 | cpumask_copy(data->freqdomain_cpus, perf->shared_cpu_map); |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 708 | |
| 709 | #ifdef CONFIG_SMP |
| 710 | dmi_check_system(sw_any_bug_dmi_table); |
Fabio Baltieri | 2624f90 | 2013-01-31 09:44:40 +0000 | [diff] [blame] | 711 | if (bios_with_sw_any_bug && !policy_is_shared(policy)) { |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 712 | policy->shared_type = CPUFREQ_SHARED_TYPE_ALL; |
Bartosz Golaszewski | 3280c3c | 2015-05-26 15:11:33 +0200 | [diff] [blame] | 713 | cpumask_copy(policy->cpus, topology_core_cpumask(cpu)); |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 714 | } |
Andre Przywara | acd3162 | 2012-09-04 08:28:03 +0000 | [diff] [blame] | 715 | |
| 716 | if (check_amd_hwpstate_cpu(cpu) && !acpi_pstate_strict) { |
| 717 | cpumask_clear(policy->cpus); |
| 718 | cpumask_set_cpu(cpu, policy->cpus); |
Bartosz Golaszewski | 3280c3c | 2015-05-26 15:11:33 +0200 | [diff] [blame] | 719 | cpumask_copy(data->freqdomain_cpus, |
| 720 | topology_sibling_cpumask(cpu)); |
Andre Przywara | acd3162 | 2012-09-04 08:28:03 +0000 | [diff] [blame] | 721 | policy->shared_type = CPUFREQ_SHARED_TYPE_HW; |
| 722 | pr_info_once(PFX "overriding BIOS provided _PSD data\n"); |
| 723 | } |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 724 | #endif |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 725 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | /* capability check */ |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 727 | if (perf->state_count <= 1) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 728 | pr_debug("No P-States\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | result = -ENODEV; |
| 730 | goto err_unreg; |
| 731 | } |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 732 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 733 | if (perf->control_register.space_id != perf->status_register.space_id) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | result = -ENODEV; |
| 735 | goto err_unreg; |
| 736 | } |
| 737 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 738 | switch (perf->control_register.space_id) { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 739 | case ACPI_ADR_SPACE_SYSTEM_IO: |
Matthew Garrett | c40a451 | 2013-01-20 10:24:26 +0000 | [diff] [blame] | 740 | if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD && |
| 741 | boot_cpu_data.x86 == 0xf) { |
| 742 | pr_debug("AMD K8 systems must use native drivers.\n"); |
| 743 | result = -ENODEV; |
| 744 | goto err_unreg; |
| 745 | } |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 746 | pr_debug("SYSTEM IO addr space\n"); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 747 | data->cpu_feature = SYSTEM_IO_CAPABLE; |
| 748 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 749 | case ACPI_ADR_SPACE_FIXED_HARDWARE: |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 750 | pr_debug("HARDWARE addr space\n"); |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 751 | if (check_est_cpu(cpu)) { |
| 752 | data->cpu_feature = SYSTEM_INTEL_MSR_CAPABLE; |
| 753 | break; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 754 | } |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 755 | if (check_amd_hwpstate_cpu(cpu)) { |
| 756 | data->cpu_feature = SYSTEM_AMD_MSR_CAPABLE; |
| 757 | break; |
| 758 | } |
| 759 | result = -ENODEV; |
| 760 | goto err_unreg; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 761 | default: |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 762 | pr_debug("Unknown addr space %d\n", |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 763 | (u32) (perf->control_register.space_id)); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 764 | result = -ENODEV; |
| 765 | goto err_unreg; |
| 766 | } |
| 767 | |
Viresh Kumar | 71508a1 | 2014-03-28 19:11:46 +0530 | [diff] [blame] | 768 | data->freq_table = kzalloc(sizeof(*data->freq_table) * |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 769 | (perf->state_count+1), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | if (!data->freq_table) { |
| 771 | result = -ENOMEM; |
| 772 | goto err_unreg; |
| 773 | } |
| 774 | |
| 775 | /* detect transition latency */ |
| 776 | policy->cpuinfo.transition_latency = 0; |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 777 | for (i = 0; i < perf->state_count; i++) { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 778 | if ((perf->states[i].transition_latency * 1000) > |
| 779 | policy->cpuinfo.transition_latency) |
| 780 | policy->cpuinfo.transition_latency = |
| 781 | perf->states[i].transition_latency * 1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | |
Pallipadi, Venkatesh | a59d163 | 2009-03-19 14:41:40 -0700 | [diff] [blame] | 784 | /* Check for high latency (>20uS) from buggy BIOSes, like on T42 */ |
| 785 | if (perf->control_register.space_id == ACPI_ADR_SPACE_FIXED_HARDWARE && |
| 786 | policy->cpuinfo.transition_latency > 20 * 1000) { |
Pallipadi, Venkatesh | a59d163 | 2009-03-19 14:41:40 -0700 | [diff] [blame] | 787 | policy->cpuinfo.transition_latency = 20 * 1000; |
Joe Perches | 61c8c67 | 2009-05-26 14:58:39 -0700 | [diff] [blame] | 788 | printk_once(KERN_INFO |
| 789 | "P-state transition latency capped at 20 uS\n"); |
Pallipadi, Venkatesh | a59d163 | 2009-03-19 14:41:40 -0700 | [diff] [blame] | 790 | } |
| 791 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | /* table init */ |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 793 | for (i = 0; i < perf->state_count; i++) { |
| 794 | if (i > 0 && perf->states[i].core_frequency >= |
Zhang Rui | 3cdf552 | 2007-06-13 21:24:02 -0400 | [diff] [blame] | 795 | data->freq_table[valid_states-1].frequency / 1000) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 796 | continue; |
| 797 | |
Viresh Kumar | 5070158 | 2013-03-30 16:25:15 +0530 | [diff] [blame] | 798 | data->freq_table[valid_states].driver_data = i; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 799 | data->freq_table[valid_states].frequency = |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 800 | perf->states[i].core_frequency * 1000; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 801 | valid_states++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | } |
Venkatesh Pallipadi | 3d4a7ef | 2006-11-13 17:47:44 -0800 | [diff] [blame] | 803 | data->freq_table[valid_states].frequency = CPUFREQ_TABLE_END; |
Venkatesh Pallipadi | 8edc59d9 | 2006-12-19 12:58:55 -0800 | [diff] [blame] | 804 | perf->state = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | |
Viresh Kumar | 776b57b | 2013-09-16 18:56:07 +0530 | [diff] [blame] | 806 | result = cpufreq_table_validate_and_show(policy, data->freq_table); |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 807 | if (result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | goto err_freqfree; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | |
Thomas Renninger | d876dfb | 2009-04-17 16:22:08 +0200 | [diff] [blame] | 810 | if (perf->states[0].core_frequency * 1000 != policy->cpuinfo.max_freq) |
| 811 | printk(KERN_WARNING FW_WARN "P-state 0 is not max freq\n"); |
| 812 | |
Mattia Dongili | a507ac4 | 2006-12-15 19:52:45 +0100 | [diff] [blame] | 813 | switch (perf->control_register.space_id) { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 814 | case ACPI_ADR_SPACE_SYSTEM_IO: |
Viresh Kumar | 1bab64d | 2013-10-16 23:58:10 +0200 | [diff] [blame] | 815 | /* |
| 816 | * The core will not set policy->cur, because |
| 817 | * cpufreq_driver->get is NULL, so we need to set it here. |
| 818 | * However, we have to guess it, because the current speed is |
| 819 | * unknown and not detectable via IO ports. |
| 820 | */ |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 821 | policy->cur = acpi_cpufreq_guess_freq(data, policy->cpu); |
| 822 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 823 | case ACPI_ADR_SPACE_FIXED_HARDWARE: |
Venkatesh Pallipadi | 7650b28 | 2006-10-03 12:36:30 -0700 | [diff] [blame] | 824 | acpi_cpufreq_driver.get = get_cur_freq_on_cpu; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 825 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 826 | default: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 827 | break; |
| 828 | } |
| 829 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | /* notify BIOS that we exist */ |
| 831 | acpi_processor_notify_smm(THIS_MODULE); |
| 832 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 833 | pr_debug("CPU%u - ACPI performance management activated.\n", cpu); |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 834 | for (i = 0; i < perf->state_count; i++) |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 835 | pr_debug(" %cP%d: %d MHz, %d mW, %d uS\n", |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 836 | (i == perf->state ? '*' : ' '), i, |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 837 | (u32) perf->states[i].core_frequency, |
| 838 | (u32) perf->states[i].power, |
| 839 | (u32) perf->states[i].transition_latency); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | |
Dominik Brodowski | 4b31e77 | 2005-05-18 13:49:00 -0400 | [diff] [blame] | 841 | /* |
| 842 | * the first call to ->target() should result in us actually |
| 843 | * writing something to the appropriate registers. |
| 844 | */ |
| 845 | data->resume = 1; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 846 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 847 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 849 | err_freqfree: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | kfree(data->freq_table); |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 851 | err_unreg: |
Rafael J. Wysocki | b2f8dc4 | 2015-07-22 22:11:16 +0200 | [diff] [blame] | 852 | acpi_processor_unregister_performance(cpu); |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 853 | err_free_mask: |
| 854 | free_cpumask_var(data->freqdomain_cpus); |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 855 | err_free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | kfree(data); |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 857 | policy->driver_data = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 859 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | } |
| 861 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 862 | static int acpi_cpufreq_cpu_exit(struct cpufreq_policy *policy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | { |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 864 | struct acpi_cpufreq_data *data = policy->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 866 | pr_debug("acpi_cpufreq_cpu_exit\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | |
| 868 | if (data) { |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 869 | policy->driver_data = NULL; |
Rafael J. Wysocki | b2f8dc4 | 2015-07-22 22:11:16 +0200 | [diff] [blame] | 870 | acpi_processor_unregister_performance(data->acpi_perf_cpu); |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 871 | free_cpumask_var(data->freqdomain_cpus); |
Zhang Rui | dab5fff | 2010-10-12 09:09:37 +0800 | [diff] [blame] | 872 | kfree(data->freq_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | kfree(data); |
| 874 | } |
| 875 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 876 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | } |
| 878 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 879 | static int acpi_cpufreq_resume(struct cpufreq_policy *policy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | { |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 881 | struct acpi_cpufreq_data *data = policy->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 883 | pr_debug("acpi_cpufreq_resume\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | |
| 885 | data->resume = 1; |
| 886 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 887 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | } |
| 889 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 890 | static struct freq_attr *acpi_cpufreq_attr[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | &cpufreq_freq_attr_scaling_available_freqs, |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 892 | &freqdomain_cpus, |
Rafael J. Wysocki | f56c50e | 2015-07-22 22:12:10 +0200 | [diff] [blame] | 893 | #ifdef CONFIG_X86_ACPI_CPUFREQ_CPB |
| 894 | &cpb, |
| 895 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | NULL, |
| 897 | }; |
| 898 | |
| 899 | static struct cpufreq_driver acpi_cpufreq_driver = { |
Viresh Kumar | db9be21 | 2013-10-03 20:27:56 +0530 | [diff] [blame] | 900 | .verify = cpufreq_generic_frequency_table_verify, |
Viresh Kumar | 9c0ebcf | 2013-10-25 19:45:48 +0530 | [diff] [blame] | 901 | .target_index = acpi_cpufreq_target, |
Thomas Renninger | e2f74f3 | 2009-11-19 12:31:01 +0100 | [diff] [blame] | 902 | .bios_limit = acpi_processor_get_bios_limit, |
| 903 | .init = acpi_cpufreq_cpu_init, |
| 904 | .exit = acpi_cpufreq_cpu_exit, |
| 905 | .resume = acpi_cpufreq_resume, |
| 906 | .name = "acpi-cpufreq", |
Thomas Renninger | e2f74f3 | 2009-11-19 12:31:01 +0100 | [diff] [blame] | 907 | .attr = acpi_cpufreq_attr, |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 908 | .set_boost = _store_boost, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | }; |
| 910 | |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 911 | static void __init acpi_cpufreq_boost_init(void) |
| 912 | { |
| 913 | if (boot_cpu_has(X86_FEATURE_CPB) || boot_cpu_has(X86_FEATURE_IDA)) { |
| 914 | msrs = msrs_alloc(); |
| 915 | |
| 916 | if (!msrs) |
| 917 | return; |
| 918 | |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 919 | acpi_cpufreq_driver.boost_supported = true; |
| 920 | acpi_cpufreq_driver.boost_enabled = boost_state(0); |
Srivatsa S. Bhat | 0197fbd | 2014-03-11 02:10:06 +0530 | [diff] [blame] | 921 | |
| 922 | cpu_notifier_register_begin(); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 923 | |
| 924 | /* Force all MSRs to the same value */ |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 925 | boost_set_msrs(acpi_cpufreq_driver.boost_enabled, |
| 926 | cpu_online_mask); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 927 | |
Srivatsa S. Bhat | 0197fbd | 2014-03-11 02:10:06 +0530 | [diff] [blame] | 928 | __register_cpu_notifier(&boost_nb); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 929 | |
Srivatsa S. Bhat | 0197fbd | 2014-03-11 02:10:06 +0530 | [diff] [blame] | 930 | cpu_notifier_register_done(); |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 931 | } |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 932 | } |
| 933 | |
Konrad Rzeszutek Wilk | eb8c68e | 2014-01-27 22:50:35 -0500 | [diff] [blame] | 934 | static void acpi_cpufreq_boost_exit(void) |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 935 | { |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 936 | if (msrs) { |
| 937 | unregister_cpu_notifier(&boost_nb); |
| 938 | |
| 939 | msrs_free(msrs); |
| 940 | msrs = NULL; |
| 941 | } |
| 942 | } |
| 943 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 944 | static int __init acpi_cpufreq_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | { |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 946 | int ret; |
| 947 | |
Rafael J. Wysocki | 75c0758 | 2013-10-25 16:22:47 +0200 | [diff] [blame] | 948 | if (acpi_disabled) |
| 949 | return -ENODEV; |
| 950 | |
Yinghai Lu | 8a61e12 | 2013-09-20 10:43:56 -0700 | [diff] [blame] | 951 | /* don't keep reloading if cpufreq_driver exists */ |
| 952 | if (cpufreq_get_current_driver()) |
Rafael J. Wysocki | 75c0758 | 2013-10-25 16:22:47 +0200 | [diff] [blame] | 953 | return -EEXIST; |
Yinghai Lu | ee29753 | 2008-09-24 19:04:31 -0700 | [diff] [blame] | 954 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 955 | pr_debug("acpi_cpufreq_init\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 957 | ret = acpi_cpufreq_early_init(); |
| 958 | if (ret) |
| 959 | return ret; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 960 | |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 961 | #ifdef CONFIG_X86_ACPI_CPUFREQ_CPB |
| 962 | /* this is a sysfs file with a strange name and an even stranger |
| 963 | * semantic - per CPU instantiation, but system global effect. |
| 964 | * Lets enable it only on AMD CPUs for compatibility reasons and |
| 965 | * only if configured. This is considered legacy code, which |
| 966 | * will probably be removed at some point in the future. |
| 967 | */ |
Rafael J. Wysocki | f56c50e | 2015-07-22 22:12:10 +0200 | [diff] [blame] | 968 | if (!check_amd_hwpstate_cpu(0)) { |
| 969 | struct freq_attr **attr; |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 970 | |
Rafael J. Wysocki | f56c50e | 2015-07-22 22:12:10 +0200 | [diff] [blame] | 971 | pr_debug("CPB unsupported, do not expose it\n"); |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 972 | |
Rafael J. Wysocki | f56c50e | 2015-07-22 22:12:10 +0200 | [diff] [blame] | 973 | for (attr = acpi_cpufreq_attr; *attr; attr++) |
| 974 | if (*attr == &cpb) { |
| 975 | *attr = NULL; |
| 976 | break; |
| 977 | } |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 978 | } |
| 979 | #endif |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 980 | acpi_cpufreq_boost_init(); |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 981 | |
Akinobu Mita | 847aef6 | 2008-07-14 11:59:44 +0900 | [diff] [blame] | 982 | ret = cpufreq_register_driver(&acpi_cpufreq_driver); |
Konrad Rzeszutek Wilk | eb8c68e | 2014-01-27 22:50:35 -0500 | [diff] [blame] | 983 | if (ret) { |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 984 | free_acpi_perf_data(); |
Konrad Rzeszutek Wilk | eb8c68e | 2014-01-27 22:50:35 -0500 | [diff] [blame] | 985 | acpi_cpufreq_boost_exit(); |
| 986 | } |
Akinobu Mita | 847aef6 | 2008-07-14 11:59:44 +0900 | [diff] [blame] | 987 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | } |
| 989 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 990 | static void __exit acpi_cpufreq_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 992 | pr_debug("acpi_cpufreq_exit\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 994 | acpi_cpufreq_boost_exit(); |
| 995 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | cpufreq_unregister_driver(&acpi_cpufreq_driver); |
| 997 | |
Luming Yu | 50f4ddd | 2011-07-08 16:37:44 -0400 | [diff] [blame] | 998 | free_acpi_perf_data(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | } |
| 1000 | |
Venkatesh Pallipadi | d395bf1 | 2005-08-25 15:59:00 -0400 | [diff] [blame] | 1001 | module_param(acpi_pstate_strict, uint, 0644); |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 1002 | MODULE_PARM_DESC(acpi_pstate_strict, |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 1003 | "value 0 or non-zero. non-zero -> strict ACPI checks are " |
| 1004 | "performed during frequency changes."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | |
| 1006 | late_initcall(acpi_cpufreq_init); |
| 1007 | module_exit(acpi_cpufreq_exit); |
| 1008 | |
Matthew Garrett | efa1719 | 2013-01-22 22:33:46 +0100 | [diff] [blame] | 1009 | static const struct x86_cpu_id acpi_cpufreq_ids[] = { |
| 1010 | X86_FEATURE_MATCH(X86_FEATURE_ACPI), |
| 1011 | X86_FEATURE_MATCH(X86_FEATURE_HW_PSTATE), |
| 1012 | {} |
| 1013 | }; |
| 1014 | MODULE_DEVICE_TABLE(x86cpu, acpi_cpufreq_ids); |
| 1015 | |
Rafael J. Wysocki | c655aff | 2013-06-07 13:13:31 +0200 | [diff] [blame] | 1016 | static const struct acpi_device_id processor_device_ids[] = { |
| 1017 | {ACPI_PROCESSOR_OBJECT_HID, }, |
| 1018 | {ACPI_PROCESSOR_DEVICE_HID, }, |
| 1019 | {}, |
| 1020 | }; |
| 1021 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); |
| 1022 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | MODULE_ALIAS("acpi"); |