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 | |
Joe Perches | 1c5864e | 2016-04-05 13:28:25 -0700 | [diff] [blame] | 28 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/kernel.h> |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/init.h> |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 33 | #include <linux/smp.h> |
| 34 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/cpufreq.h> |
Venkatesh Pallipadi | d395bf1 | 2005-08-25 15:59:00 -0400 | [diff] [blame] | 36 | #include <linux/compiler.h> |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 37 | #include <linux/dmi.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 38 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | #include <linux/acpi.h> |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 41 | #include <linux/io.h> |
| 42 | #include <linux/delay.h> |
| 43 | #include <linux/uaccess.h> |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <acpi/processor.h> |
| 46 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 47 | #include <asm/msr.h> |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 48 | #include <asm/processor.h> |
| 49 | #include <asm/cpufeature.h> |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 50 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | MODULE_AUTHOR("Paul Diefenbaugh, Dominik Brodowski"); |
| 52 | MODULE_DESCRIPTION("ACPI Processor P-States Driver"); |
| 53 | MODULE_LICENSE("GPL"); |
| 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 | unsigned int resume; |
| 69 | unsigned int cpu_feature; |
Pan Xinhui | 8cfcfd3 | 2015-07-10 14:36:20 +0800 | [diff] [blame] | 70 | unsigned int acpi_perf_cpu; |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 71 | cpumask_var_t freqdomain_cpus; |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 72 | void (*cpu_freq_write)(struct acpi_pct_register *reg, u32 val); |
| 73 | u32 (*cpu_freq_read)(struct acpi_pct_register *reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | }; |
| 75 | |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 76 | /* acpi_perf_data is a pointer to percpu data. */ |
Namhyung Kim | 3f6c4df | 2010-08-13 23:00:11 +0900 | [diff] [blame] | 77 | static struct acpi_processor_performance __percpu *acpi_perf_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 79 | static inline struct acpi_processor_performance *to_perf_data(struct acpi_cpufreq_data *data) |
| 80 | { |
| 81 | return per_cpu_ptr(acpi_perf_data, data->acpi_perf_cpu); |
| 82 | } |
| 83 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | static struct cpufreq_driver acpi_cpufreq_driver; |
| 85 | |
Venkatesh Pallipadi | d395bf1 | 2005-08-25 15:59:00 -0400 | [diff] [blame] | 86 | static unsigned int acpi_pstate_strict; |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 87 | static struct msr __percpu *msrs; |
| 88 | |
| 89 | static bool boost_state(unsigned int cpu) |
| 90 | { |
| 91 | u32 lo, hi; |
| 92 | u64 msr; |
| 93 | |
| 94 | switch (boot_cpu_data.x86_vendor) { |
| 95 | case X86_VENDOR_INTEL: |
| 96 | rdmsr_on_cpu(cpu, MSR_IA32_MISC_ENABLE, &lo, &hi); |
| 97 | msr = lo | ((u64)hi << 32); |
| 98 | return !(msr & MSR_IA32_MISC_ENABLE_TURBO_DISABLE); |
| 99 | case X86_VENDOR_AMD: |
| 100 | rdmsr_on_cpu(cpu, MSR_K7_HWCR, &lo, &hi); |
| 101 | msr = lo | ((u64)hi << 32); |
| 102 | return !(msr & MSR_K7_HWCR_CPB_DIS); |
| 103 | } |
| 104 | return false; |
| 105 | } |
| 106 | |
| 107 | static void boost_set_msrs(bool enable, const struct cpumask *cpumask) |
| 108 | { |
| 109 | u32 cpu; |
| 110 | u32 msr_addr; |
| 111 | u64 msr_mask; |
| 112 | |
| 113 | switch (boot_cpu_data.x86_vendor) { |
| 114 | case X86_VENDOR_INTEL: |
| 115 | msr_addr = MSR_IA32_MISC_ENABLE; |
| 116 | msr_mask = MSR_IA32_MISC_ENABLE_TURBO_DISABLE; |
| 117 | break; |
| 118 | case X86_VENDOR_AMD: |
| 119 | msr_addr = MSR_K7_HWCR; |
| 120 | msr_mask = MSR_K7_HWCR_CPB_DIS; |
| 121 | break; |
| 122 | default: |
| 123 | return; |
| 124 | } |
| 125 | |
| 126 | rdmsr_on_cpus(cpumask, msr_addr, msrs); |
| 127 | |
| 128 | for_each_cpu(cpu, cpumask) { |
| 129 | struct msr *reg = per_cpu_ptr(msrs, cpu); |
| 130 | if (enable) |
| 131 | reg->q &= ~msr_mask; |
| 132 | else |
| 133 | reg->q |= msr_mask; |
| 134 | } |
| 135 | |
| 136 | wrmsr_on_cpus(cpumask, msr_addr, msrs); |
| 137 | } |
| 138 | |
Rafael J. Wysocki | 1713578 | 2015-12-27 00:25:35 +0100 | [diff] [blame] | 139 | static int set_boost(int val) |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 140 | { |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 141 | get_online_cpus(); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 142 | boost_set_msrs(val, cpu_online_mask); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 143 | put_online_cpus(); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 144 | pr_debug("Core Boosting %sabled.\n", val ? "en" : "dis"); |
| 145 | |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 146 | return 0; |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 147 | } |
| 148 | |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 149 | static ssize_t show_freqdomain_cpus(struct cpufreq_policy *policy, char *buf) |
| 150 | { |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 151 | struct acpi_cpufreq_data *data = policy->driver_data; |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 152 | |
Srinivas Pandruvada | e253036 | 2015-10-07 13:50:43 -0700 | [diff] [blame] | 153 | if (unlikely(!data)) |
| 154 | return -ENODEV; |
| 155 | |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 156 | return cpufreq_show_cpus(data->freqdomain_cpus, buf); |
| 157 | } |
| 158 | |
| 159 | cpufreq_freq_attr_ro(freqdomain_cpus); |
| 160 | |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 161 | #ifdef CONFIG_X86_ACPI_CPUFREQ_CPB |
Rafael J. Wysocki | 1713578 | 2015-12-27 00:25:35 +0100 | [diff] [blame] | 162 | static ssize_t store_cpb(struct cpufreq_policy *policy, const char *buf, |
| 163 | size_t count) |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 164 | { |
| 165 | int ret; |
Rafael J. Wysocki | 1713578 | 2015-12-27 00:25:35 +0100 | [diff] [blame] | 166 | unsigned int val = 0; |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 167 | |
Rafael J. Wysocki | 7a6c79f | 2015-12-27 00:27:38 +0100 | [diff] [blame] | 168 | if (!acpi_cpufreq_driver.set_boost) |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 169 | return -EINVAL; |
| 170 | |
Rafael J. Wysocki | 1713578 | 2015-12-27 00:25:35 +0100 | [diff] [blame] | 171 | ret = kstrtouint(buf, 10, &val); |
| 172 | if (ret || val > 1) |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 173 | return -EINVAL; |
| 174 | |
Rafael J. Wysocki | 1713578 | 2015-12-27 00:25:35 +0100 | [diff] [blame] | 175 | set_boost(val); |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 176 | |
| 177 | return count; |
| 178 | } |
| 179 | |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 180 | static ssize_t show_cpb(struct cpufreq_policy *policy, char *buf) |
| 181 | { |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 182 | return sprintf(buf, "%u\n", acpi_cpufreq_driver.boost_enabled); |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 183 | } |
| 184 | |
Lan Tianyu | 59027d3 | 2013-08-13 10:05:53 +0800 | [diff] [blame] | 185 | cpufreq_freq_attr_rw(cpb); |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 186 | #endif |
| 187 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 188 | static int check_est_cpu(unsigned int cpuid) |
| 189 | { |
Mike Travis | 92cb761 | 2007-10-19 20:35:04 +0200 | [diff] [blame] | 190 | struct cpuinfo_x86 *cpu = &cpu_data(cpuid); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 191 | |
Harald Welte | 0de5108 | 2009-06-08 18:27:54 +0800 | [diff] [blame] | 192 | return cpu_has(cpu, X86_FEATURE_EST); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 193 | } |
| 194 | |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 195 | static int check_amd_hwpstate_cpu(unsigned int cpuid) |
| 196 | { |
| 197 | struct cpuinfo_x86 *cpu = &cpu_data(cpuid); |
| 198 | |
| 199 | return cpu_has(cpu, X86_FEATURE_HW_PSTATE); |
| 200 | } |
| 201 | |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 202 | static unsigned extract_io(struct cpufreq_policy *policy, u32 value) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 203 | { |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 204 | struct acpi_cpufreq_data *data = policy->driver_data; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 205 | struct acpi_processor_performance *perf; |
| 206 | int i; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 207 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 208 | perf = to_perf_data(data); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 209 | |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 210 | for (i = 0; i < perf->state_count; i++) { |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 211 | if (value == perf->states[i].status) |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 212 | return policy->freq_table[i].frequency; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 213 | } |
| 214 | return 0; |
| 215 | } |
| 216 | |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 217 | static unsigned extract_msr(struct cpufreq_policy *policy, u32 msr) |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 218 | { |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 219 | struct acpi_cpufreq_data *data = policy->driver_data; |
Stratos Karafotis | 041526f | 2014-04-25 23:15:38 +0300 | [diff] [blame] | 220 | struct cpufreq_frequency_table *pos; |
Venkatesh Pallipadi | a6f6e6e6 | 2006-10-03 12:37:42 -0700 | [diff] [blame] | 221 | struct acpi_processor_performance *perf; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 222 | |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 223 | if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) |
| 224 | msr &= AMD_MSR_RANGE; |
| 225 | else |
| 226 | msr &= INTEL_MSR_RANGE; |
| 227 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 228 | perf = to_perf_data(data); |
Venkatesh Pallipadi | a6f6e6e6 | 2006-10-03 12:37:42 -0700 | [diff] [blame] | 229 | |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 230 | cpufreq_for_each_entry(pos, policy->freq_table) |
Stratos Karafotis | 041526f | 2014-04-25 23:15:38 +0300 | [diff] [blame] | 231 | if (msr == perf->states[pos->driver_data].status) |
| 232 | return pos->frequency; |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 233 | return policy->freq_table[0].frequency; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 234 | } |
| 235 | |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 236 | static unsigned extract_freq(struct cpufreq_policy *policy, u32 val) |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 237 | { |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 238 | struct acpi_cpufreq_data *data = policy->driver_data; |
| 239 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 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: |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 243 | return extract_msr(policy, val); |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 244 | case SYSTEM_IO_CAPABLE: |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 245 | return extract_io(policy, val); |
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 | |
Jisheng Zhang | ac13b99 | 2016-03-22 22:34:30 +0800 | [diff] [blame] | 251 | static u32 cpu_freq_read_intel(struct acpi_pct_register *not_used) |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 252 | { |
| 253 | u32 val, dummy; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 254 | |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 255 | rdmsr(MSR_IA32_PERF_CTL, val, dummy); |
| 256 | return val; |
| 257 | } |
| 258 | |
Jisheng Zhang | ac13b99 | 2016-03-22 22:34:30 +0800 | [diff] [blame] | 259 | static void cpu_freq_write_intel(struct acpi_pct_register *not_used, u32 val) |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 260 | { |
| 261 | u32 lo, hi; |
| 262 | |
| 263 | rdmsr(MSR_IA32_PERF_CTL, lo, hi); |
| 264 | lo = (lo & ~INTEL_MSR_RANGE) | (val & INTEL_MSR_RANGE); |
| 265 | wrmsr(MSR_IA32_PERF_CTL, lo, hi); |
| 266 | } |
| 267 | |
Jisheng Zhang | ac13b99 | 2016-03-22 22:34:30 +0800 | [diff] [blame] | 268 | static u32 cpu_freq_read_amd(struct acpi_pct_register *not_used) |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 269 | { |
| 270 | u32 val, dummy; |
| 271 | |
| 272 | rdmsr(MSR_AMD_PERF_CTL, val, dummy); |
| 273 | return val; |
| 274 | } |
| 275 | |
Jisheng Zhang | ac13b99 | 2016-03-22 22:34:30 +0800 | [diff] [blame] | 276 | static void cpu_freq_write_amd(struct acpi_pct_register *not_used, u32 val) |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 277 | { |
| 278 | wrmsr(MSR_AMD_PERF_CTL, val, 0); |
| 279 | } |
| 280 | |
Jisheng Zhang | ac13b99 | 2016-03-22 22:34:30 +0800 | [diff] [blame] | 281 | static u32 cpu_freq_read_io(struct acpi_pct_register *reg) |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 282 | { |
| 283 | u32 val; |
| 284 | |
| 285 | acpi_os_read_port(reg->address, &val, reg->bit_width); |
| 286 | return val; |
| 287 | } |
| 288 | |
Jisheng Zhang | ac13b99 | 2016-03-22 22:34:30 +0800 | [diff] [blame] | 289 | static void cpu_freq_write_io(struct acpi_pct_register *reg, u32 val) |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 290 | { |
| 291 | acpi_os_write_port(reg->address, val, reg->bit_width); |
| 292 | } |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 293 | |
| 294 | struct drv_cmd { |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 295 | struct acpi_pct_register *reg; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 296 | u32 val; |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 297 | union { |
| 298 | void (*write)(struct acpi_pct_register *reg, u32 val); |
| 299 | u32 (*read)(struct acpi_pct_register *reg); |
| 300 | } func; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 301 | }; |
| 302 | |
Andrew Morton | 01599fc | 2009-04-13 10:27:49 -0700 | [diff] [blame] | 303 | /* Called via smp_call_function_single(), on the target CPU */ |
| 304 | static void do_drv_read(void *_cmd) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 305 | { |
Mike Travis | 7285908 | 2009-01-16 15:31:15 -0800 | [diff] [blame] | 306 | struct drv_cmd *cmd = _cmd; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 307 | |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 308 | cmd->val = cmd->func.read(cmd->reg); |
| 309 | } |
| 310 | |
| 311 | static u32 drv_read(struct acpi_cpufreq_data *data, const struct cpumask *mask) |
| 312 | { |
| 313 | struct acpi_processor_performance *perf = to_perf_data(data); |
| 314 | struct drv_cmd cmd = { |
| 315 | .reg = &perf->control_register, |
| 316 | .func.read = data->cpu_freq_read, |
| 317 | }; |
| 318 | int err; |
| 319 | |
| 320 | err = smp_call_function_any(mask, do_drv_read, &cmd, 1); |
| 321 | WARN_ON_ONCE(err); /* smp_call_function_any() was buggy? */ |
| 322 | return cmd.val; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 323 | } |
| 324 | |
Andrew Morton | 01599fc | 2009-04-13 10:27:49 -0700 | [diff] [blame] | 325 | /* Called via smp_call_function_many(), on the target CPUs */ |
| 326 | static void do_drv_write(void *_cmd) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 327 | { |
Mike Travis | 7285908 | 2009-01-16 15:31:15 -0800 | [diff] [blame] | 328 | struct drv_cmd *cmd = _cmd; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 329 | |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 330 | cmd->func.write(cmd->reg, cmd->val); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 331 | } |
| 332 | |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 333 | static void drv_write(struct acpi_cpufreq_data *data, |
| 334 | const struct cpumask *mask, u32 val) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 335 | { |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 336 | struct acpi_processor_performance *perf = to_perf_data(data); |
| 337 | struct drv_cmd cmd = { |
| 338 | .reg = &perf->control_register, |
| 339 | .val = val, |
| 340 | .func.write = data->cpu_freq_write, |
| 341 | }; |
Linus Torvalds | ea34f43 | 2009-04-15 08:05:13 -0700 | [diff] [blame] | 342 | int this_cpu; |
| 343 | |
| 344 | this_cpu = get_cpu(); |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 345 | if (cpumask_test_cpu(this_cpu, mask)) |
| 346 | do_drv_write(&cmd); |
| 347 | |
| 348 | smp_call_function_many(mask, do_drv_write, &cmd, 1); |
Linus Torvalds | ea34f43 | 2009-04-15 08:05:13 -0700 | [diff] [blame] | 349 | put_cpu(); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 350 | } |
| 351 | |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 352 | static u32 get_cur_val(const struct cpumask *mask, struct acpi_cpufreq_data *data) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 353 | { |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 354 | u32 val; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 355 | |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 356 | if (unlikely(cpumask_empty(mask))) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 357 | return 0; |
| 358 | |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 359 | val = drv_read(data, mask); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 360 | |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 361 | pr_debug("get_cur_val = %u\n", val); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 362 | |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 363 | return val; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | static unsigned int get_cur_freq_on_cpu(unsigned int cpu) |
| 367 | { |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 368 | struct acpi_cpufreq_data *data; |
| 369 | struct cpufreq_policy *policy; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 370 | unsigned int freq; |
Venkatesh Pallipadi | e56a727 | 2008-04-28 15:13:43 -0400 | [diff] [blame] | 371 | unsigned int cached_freq; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 372 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 373 | pr_debug("get_cur_freq_on_cpu (%d)\n", cpu); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 374 | |
Rafael J. Wysocki | 1f0bd44 | 2015-09-16 02:17:49 +0200 | [diff] [blame] | 375 | policy = cpufreq_cpu_get_raw(cpu); |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 376 | if (unlikely(!policy)) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 377 | return 0; |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 378 | |
| 379 | data = policy->driver_data; |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 380 | if (unlikely(!data || !policy->freq_table)) |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 381 | return 0; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 382 | |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 383 | cached_freq = policy->freq_table[to_perf_data(data)->state].frequency; |
| 384 | freq = extract_freq(policy, get_cur_val(cpumask_of(cpu), data)); |
Venkatesh Pallipadi | e56a727 | 2008-04-28 15:13:43 -0400 | [diff] [blame] | 385 | if (freq != cached_freq) { |
| 386 | /* |
| 387 | * The dreaded BIOS frequency change behind our back. |
| 388 | * Force set the frequency on next target call. |
| 389 | */ |
| 390 | data->resume = 1; |
| 391 | } |
| 392 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 393 | pr_debug("cur freq = %u\n", freq); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 394 | |
| 395 | return freq; |
| 396 | } |
| 397 | |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 398 | static unsigned int check_freqs(struct cpufreq_policy *policy, |
| 399 | const struct cpumask *mask, unsigned int freq) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 400 | { |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 401 | struct acpi_cpufreq_data *data = policy->driver_data; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 402 | unsigned int cur_freq; |
| 403 | unsigned int i; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 404 | |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 405 | for (i = 0; i < 100; i++) { |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 406 | cur_freq = extract_freq(policy, get_cur_val(mask, data)); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 407 | if (cur_freq == freq) |
| 408 | return 1; |
| 409 | udelay(10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | } |
| 411 | return 0; |
| 412 | } |
| 413 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 414 | static int acpi_cpufreq_target(struct cpufreq_policy *policy, |
Viresh Kumar | 9c0ebcf | 2013-10-25 19:45:48 +0530 | [diff] [blame] | 415 | unsigned int index) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | { |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 417 | struct acpi_cpufreq_data *data = policy->driver_data; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 418 | struct acpi_processor_performance *perf; |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 419 | const struct cpumask *mask; |
Venkatesh Pallipadi | 8edc59d9 | 2006-12-19 12:58:55 -0800 | [diff] [blame] | 420 | unsigned int next_perf_state = 0; /* Index into perf table */ |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 421 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 423 | if (unlikely(!data)) { |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 424 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | } |
| 426 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 427 | perf = to_perf_data(data); |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 428 | next_perf_state = policy->freq_table[index].driver_data; |
Venkatesh Pallipadi | 7650b28 | 2006-10-03 12:36:30 -0700 | [diff] [blame] | 429 | if (perf->state == next_perf_state) { |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 430 | if (unlikely(data->resume)) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 431 | pr_debug("Called after resume, resetting to P%d\n", |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 432 | next_perf_state); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 433 | data->resume = 0; |
| 434 | } else { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 435 | pr_debug("Already at target state (P%d)\n", |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 436 | next_perf_state); |
Rafael J. Wysocki | 9a909a1 | 2016-02-26 00:03:58 +0100 | [diff] [blame] | 437 | return 0; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 438 | } |
| 439 | } |
| 440 | |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 441 | /* |
| 442 | * The core won't allow CPUs to go away until the governor has been |
| 443 | * stopped, so we can rely on the stability of policy->cpus. |
| 444 | */ |
| 445 | mask = policy->shared_type == CPUFREQ_SHARED_TYPE_ANY ? |
| 446 | cpumask_of(policy->cpu) : policy->cpus; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 447 | |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 448 | drv_write(data, mask, perf->states[next_perf_state].control); |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 449 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 450 | if (acpi_pstate_strict) { |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 451 | if (!check_freqs(policy, mask, |
| 452 | policy->freq_table[index].frequency)) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 453 | pr_debug("acpi_cpufreq_target failed (%d)\n", |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 454 | policy->cpu); |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 455 | result = -EAGAIN; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 456 | } |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 457 | } |
| 458 | |
Viresh Kumar | e15d830 | 2013-06-19 14:22:55 +0530 | [diff] [blame] | 459 | if (!result) |
| 460 | perf->state = next_perf_state; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 461 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 462 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | } |
| 464 | |
Rafael J. Wysocki | b7898fd | 2016-03-30 03:47:49 +0200 | [diff] [blame] | 465 | unsigned int acpi_cpufreq_fast_switch(struct cpufreq_policy *policy, |
| 466 | unsigned int target_freq) |
| 467 | { |
| 468 | struct acpi_cpufreq_data *data = policy->driver_data; |
| 469 | struct acpi_processor_performance *perf; |
| 470 | struct cpufreq_frequency_table *entry; |
| 471 | unsigned int next_perf_state, next_freq, freq; |
| 472 | |
| 473 | /* |
| 474 | * Find the closest frequency above target_freq. |
| 475 | * |
| 476 | * The table is sorted in the reverse order with respect to the |
| 477 | * frequency and all of the entries are valid (see the initialization). |
| 478 | */ |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 479 | entry = policy->freq_table; |
Rafael J. Wysocki | b7898fd | 2016-03-30 03:47:49 +0200 | [diff] [blame] | 480 | do { |
| 481 | entry++; |
| 482 | freq = entry->frequency; |
| 483 | } while (freq >= target_freq && freq != CPUFREQ_TABLE_END); |
| 484 | entry--; |
| 485 | next_freq = entry->frequency; |
| 486 | next_perf_state = entry->driver_data; |
| 487 | |
| 488 | perf = to_perf_data(data); |
| 489 | if (perf->state == next_perf_state) { |
| 490 | if (unlikely(data->resume)) |
| 491 | data->resume = 0; |
| 492 | else |
| 493 | return next_freq; |
| 494 | } |
| 495 | |
| 496 | data->cpu_freq_write(&perf->control_register, |
| 497 | perf->states[next_perf_state].control); |
| 498 | perf->state = next_perf_state; |
| 499 | return next_freq; |
| 500 | } |
| 501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | static unsigned long |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 503 | acpi_cpufreq_guess_freq(struct acpi_cpufreq_data *data, unsigned int cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | { |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 505 | struct acpi_processor_performance *perf; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 506 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 507 | perf = to_perf_data(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | if (cpu_khz) { |
| 509 | /* search the closest match to cpu_khz */ |
| 510 | unsigned int i; |
| 511 | unsigned long freq; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 512 | unsigned long freqn = perf->states[0].core_frequency * 1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 514 | for (i = 0; i < (perf->state_count-1); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | freq = freqn; |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 516 | freqn = perf->states[i+1].core_frequency * 1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | if ((2 * cpu_khz) > (freqn + freq)) { |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 518 | perf->state = i; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 519 | return freq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | } |
| 521 | } |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 522 | perf->state = perf->state_count-1; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 523 | return freqn; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 524 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | /* assume CPU is at P0... */ |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 526 | perf->state = 0; |
| 527 | return perf->states[0].core_frequency * 1000; |
| 528 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | } |
| 530 | |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 531 | static void free_acpi_perf_data(void) |
| 532 | { |
| 533 | unsigned int i; |
| 534 | |
| 535 | /* Freeing a NULL pointer is OK, and alloc_percpu zeroes. */ |
| 536 | for_each_possible_cpu(i) |
| 537 | free_cpumask_var(per_cpu_ptr(acpi_perf_data, i) |
| 538 | ->shared_cpu_map); |
| 539 | free_percpu(acpi_perf_data); |
| 540 | } |
| 541 | |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 542 | static int boost_notify(struct notifier_block *nb, unsigned long action, |
| 543 | void *hcpu) |
| 544 | { |
| 545 | unsigned cpu = (long)hcpu; |
| 546 | const struct cpumask *cpumask; |
| 547 | |
| 548 | cpumask = get_cpu_mask(cpu); |
| 549 | |
| 550 | /* |
| 551 | * Clear the boost-disable bit on the CPU_DOWN path so that |
| 552 | * this cpu cannot block the remaining ones from boosting. On |
| 553 | * the CPU_UP path we simply keep the boost-disable flag in |
| 554 | * sync with the current global state. |
| 555 | */ |
| 556 | |
| 557 | switch (action) { |
Richard Cochran | ed72662 | 2016-03-18 22:26:11 +0100 | [diff] [blame] | 558 | case CPU_DOWN_FAILED: |
| 559 | case CPU_DOWN_FAILED_FROZEN: |
| 560 | case CPU_ONLINE: |
| 561 | case CPU_ONLINE_FROZEN: |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 562 | boost_set_msrs(acpi_cpufreq_driver.boost_enabled, cpumask); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 563 | break; |
| 564 | |
| 565 | case CPU_DOWN_PREPARE: |
| 566 | case CPU_DOWN_PREPARE_FROZEN: |
| 567 | boost_set_msrs(1, cpumask); |
| 568 | break; |
| 569 | |
| 570 | default: |
| 571 | break; |
| 572 | } |
| 573 | |
| 574 | return NOTIFY_OK; |
| 575 | } |
| 576 | |
| 577 | |
| 578 | static struct notifier_block boost_nb = { |
| 579 | .notifier_call = boost_notify, |
| 580 | }; |
| 581 | |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 582 | /* |
| 583 | * acpi_cpufreq_early_init - initialize ACPI P-States library |
| 584 | * |
| 585 | * Initialize the ACPI P-States library (drivers/acpi/processor_perflib.c) |
| 586 | * in order to determine correct frequency and voltage pairings. We can |
| 587 | * do _PDC and _PSD and find out the processor dependency for the |
| 588 | * actual init that will happen later... |
| 589 | */ |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 590 | static int __init acpi_cpufreq_early_init(void) |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 591 | { |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 592 | unsigned int i; |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 593 | pr_debug("acpi_cpufreq_early_init\n"); |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 594 | |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 595 | acpi_perf_data = alloc_percpu(struct acpi_processor_performance); |
| 596 | if (!acpi_perf_data) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 597 | pr_debug("Memory allocation error for acpi_perf_data.\n"); |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 598 | return -ENOMEM; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 599 | } |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 600 | for_each_possible_cpu(i) { |
Yinghai Lu | eaa9584 | 2009-06-06 14:51:36 -0700 | [diff] [blame] | 601 | if (!zalloc_cpumask_var_node( |
Mike Travis | 80855f7 | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 602 | &per_cpu_ptr(acpi_perf_data, i)->shared_cpu_map, |
| 603 | GFP_KERNEL, cpu_to_node(i))) { |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 604 | |
| 605 | /* Freeing a NULL pointer is OK: alloc_percpu zeroes. */ |
| 606 | free_acpi_perf_data(); |
| 607 | return -ENOMEM; |
| 608 | } |
| 609 | } |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 610 | |
| 611 | /* Do initialization in ACPI core */ |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 612 | acpi_processor_preregister_performance(acpi_perf_data); |
| 613 | return 0; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 614 | } |
| 615 | |
Dave Jones | 95625b8 | 2006-10-21 01:37:39 -0400 | [diff] [blame] | 616 | #ifdef CONFIG_SMP |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 617 | /* |
| 618 | * Some BIOSes do SW_ANY coordination internally, either set it up in hw |
| 619 | * or do it in BIOS firmware and won't inform about it to OS. If not |
| 620 | * detected, this has a side effect of making CPU run at a different speed |
| 621 | * than OS intended it to run at. Detect it and handle it cleanly. |
| 622 | */ |
| 623 | static int bios_with_sw_any_bug; |
| 624 | |
Jeff Garzik | 1855256 | 2007-10-03 15:15:40 -0400 | [diff] [blame] | 625 | static int sw_any_bug_found(const struct dmi_system_id *d) |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 626 | { |
| 627 | bios_with_sw_any_bug = 1; |
| 628 | return 0; |
| 629 | } |
| 630 | |
Jeff Garzik | 1855256 | 2007-10-03 15:15:40 -0400 | [diff] [blame] | 631 | static const struct dmi_system_id sw_any_bug_dmi_table[] = { |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 632 | { |
| 633 | .callback = sw_any_bug_found, |
| 634 | .ident = "Supermicro Server X6DLP", |
| 635 | .matches = { |
| 636 | DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"), |
| 637 | DMI_MATCH(DMI_BIOS_VERSION, "080010"), |
| 638 | DMI_MATCH(DMI_PRODUCT_NAME, "X6DLP"), |
| 639 | }, |
| 640 | }, |
| 641 | { } |
| 642 | }; |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 643 | |
| 644 | static int acpi_cpufreq_blacklist(struct cpuinfo_x86 *c) |
| 645 | { |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 646 | /* Intel Xeon Processor 7100 Series Specification Update |
| 647 | * http://www.intel.com/Assets/PDF/specupdate/314554.pdf |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 648 | * AL30: A Machine Check Exception (MCE) Occurring during an |
| 649 | * Enhanced Intel SpeedStep Technology Ratio Change May Cause |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 650 | * Both Processor Cores to Lock Up. */ |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 651 | if (c->x86_vendor == X86_VENDOR_INTEL) { |
| 652 | if ((c->x86 == 15) && |
| 653 | (c->x86_model == 6) && |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 654 | (c->x86_mask == 8)) { |
Joe Perches | 1c5864e | 2016-04-05 13:28:25 -0700 | [diff] [blame] | 655 | pr_info("Intel(R) Xeon(R) 7100 Errata AL30, processors may lock up on frequency changes: disabling acpi-cpufreq\n"); |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 656 | return -ENODEV; |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 657 | } |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 658 | } |
| 659 | return 0; |
| 660 | } |
Dave Jones | 95625b8 | 2006-10-21 01:37:39 -0400 | [diff] [blame] | 661 | #endif |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 662 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 663 | static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 665 | unsigned int i; |
| 666 | unsigned int valid_states = 0; |
| 667 | unsigned int cpu = policy->cpu; |
| 668 | struct acpi_cpufreq_data *data; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 669 | unsigned int result = 0; |
Mike Travis | 92cb761 | 2007-10-19 20:35:04 +0200 | [diff] [blame] | 670 | struct cpuinfo_x86 *c = &cpu_data(policy->cpu); |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 671 | struct acpi_processor_performance *perf; |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 672 | struct cpufreq_frequency_table *freq_table; |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 673 | #ifdef CONFIG_SMP |
| 674 | static int blacklisted; |
| 675 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 677 | pr_debug("acpi_cpufreq_cpu_init\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 679 | #ifdef CONFIG_SMP |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 680 | if (blacklisted) |
| 681 | return blacklisted; |
| 682 | blacklisted = acpi_cpufreq_blacklist(c); |
| 683 | if (blacklisted) |
| 684 | return blacklisted; |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 685 | #endif |
| 686 | |
Viresh Kumar | d5b73cd | 2013-08-06 22:53:06 +0530 | [diff] [blame] | 687 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | if (!data) |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 689 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 691 | if (!zalloc_cpumask_var(&data->freqdomain_cpus, GFP_KERNEL)) { |
| 692 | result = -ENOMEM; |
| 693 | goto err_free; |
| 694 | } |
| 695 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 696 | perf = per_cpu_ptr(acpi_perf_data, cpu); |
Pan Xinhui | 8cfcfd3 | 2015-07-10 14:36:20 +0800 | [diff] [blame] | 697 | data->acpi_perf_cpu = cpu; |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 698 | policy->driver_data = data; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 699 | |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 700 | if (cpu_has(c, X86_FEATURE_CONSTANT_TSC)) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 701 | acpi_cpufreq_driver.flags |= CPUFREQ_CONST_LOOPS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | |
Rafael J. Wysocki | 3427616 | 2015-07-22 22:11:56 +0200 | [diff] [blame] | 703 | result = acpi_processor_register_performance(perf, cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | if (result) |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 705 | goto err_free_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 707 | policy->shared_type = perf->shared_type; |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 708 | |
Venkatesh Pallipadi | 46f18e3 | 2006-06-26 00:34:43 -0400 | [diff] [blame] | 709 | /* |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 710 | * Will let policy->cpus know about dependency only when software |
Venkatesh Pallipadi | 46f18e3 | 2006-06-26 00:34:43 -0400 | [diff] [blame] | 711 | * coordination is required. |
| 712 | */ |
| 713 | if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL || |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 714 | policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) { |
Rusty Russell | 835481d | 2009-01-04 05:18:06 -0800 | [diff] [blame] | 715 | cpumask_copy(policy->cpus, perf->shared_cpu_map); |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 716 | } |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 717 | cpumask_copy(data->freqdomain_cpus, perf->shared_cpu_map); |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 718 | |
| 719 | #ifdef CONFIG_SMP |
| 720 | dmi_check_system(sw_any_bug_dmi_table); |
Fabio Baltieri | 2624f90 | 2013-01-31 09:44:40 +0000 | [diff] [blame] | 721 | if (bios_with_sw_any_bug && !policy_is_shared(policy)) { |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 722 | policy->shared_type = CPUFREQ_SHARED_TYPE_ALL; |
Bartosz Golaszewski | 3280c3c | 2015-05-26 15:11:33 +0200 | [diff] [blame] | 723 | cpumask_copy(policy->cpus, topology_core_cpumask(cpu)); |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 724 | } |
Andre Przywara | acd3162 | 2012-09-04 08:28:03 +0000 | [diff] [blame] | 725 | |
| 726 | if (check_amd_hwpstate_cpu(cpu) && !acpi_pstate_strict) { |
| 727 | cpumask_clear(policy->cpus); |
| 728 | cpumask_set_cpu(cpu, policy->cpus); |
Bartosz Golaszewski | 3280c3c | 2015-05-26 15:11:33 +0200 | [diff] [blame] | 729 | cpumask_copy(data->freqdomain_cpus, |
| 730 | topology_sibling_cpumask(cpu)); |
Andre Przywara | acd3162 | 2012-09-04 08:28:03 +0000 | [diff] [blame] | 731 | policy->shared_type = CPUFREQ_SHARED_TYPE_HW; |
Joe Perches | 1c5864e | 2016-04-05 13:28:25 -0700 | [diff] [blame] | 732 | pr_info_once("overriding BIOS provided _PSD data\n"); |
Andre Przywara | acd3162 | 2012-09-04 08:28:03 +0000 | [diff] [blame] | 733 | } |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 734 | #endif |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 735 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | /* capability check */ |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 737 | if (perf->state_count <= 1) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 738 | pr_debug("No P-States\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | result = -ENODEV; |
| 740 | goto err_unreg; |
| 741 | } |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 742 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 743 | if (perf->control_register.space_id != perf->status_register.space_id) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | result = -ENODEV; |
| 745 | goto err_unreg; |
| 746 | } |
| 747 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 748 | switch (perf->control_register.space_id) { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 749 | case ACPI_ADR_SPACE_SYSTEM_IO: |
Matthew Garrett | c40a451 | 2013-01-20 10:24:26 +0000 | [diff] [blame] | 750 | if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD && |
| 751 | boot_cpu_data.x86 == 0xf) { |
| 752 | pr_debug("AMD K8 systems must use native drivers.\n"); |
| 753 | result = -ENODEV; |
| 754 | goto err_unreg; |
| 755 | } |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 756 | pr_debug("SYSTEM IO addr space\n"); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 757 | data->cpu_feature = SYSTEM_IO_CAPABLE; |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 758 | data->cpu_freq_read = cpu_freq_read_io; |
| 759 | data->cpu_freq_write = cpu_freq_write_io; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 760 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 761 | case ACPI_ADR_SPACE_FIXED_HARDWARE: |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 762 | pr_debug("HARDWARE addr space\n"); |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 763 | if (check_est_cpu(cpu)) { |
| 764 | data->cpu_feature = SYSTEM_INTEL_MSR_CAPABLE; |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 765 | data->cpu_freq_read = cpu_freq_read_intel; |
| 766 | data->cpu_freq_write = cpu_freq_write_intel; |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 767 | break; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 768 | } |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 769 | if (check_amd_hwpstate_cpu(cpu)) { |
| 770 | data->cpu_feature = SYSTEM_AMD_MSR_CAPABLE; |
Rafael J. Wysocki | ed757a2 | 2016-03-02 03:05:22 +0100 | [diff] [blame] | 771 | data->cpu_freq_read = cpu_freq_read_amd; |
| 772 | data->cpu_freq_write = cpu_freq_write_amd; |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 773 | break; |
| 774 | } |
| 775 | result = -ENODEV; |
| 776 | goto err_unreg; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 777 | default: |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 778 | pr_debug("Unknown addr space %d\n", |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 779 | (u32) (perf->control_register.space_id)); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 780 | result = -ENODEV; |
| 781 | goto err_unreg; |
| 782 | } |
| 783 | |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 784 | freq_table = kzalloc(sizeof(*freq_table) * |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 785 | (perf->state_count+1), GFP_KERNEL); |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 786 | if (!freq_table) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | result = -ENOMEM; |
| 788 | goto err_unreg; |
| 789 | } |
| 790 | |
| 791 | /* detect transition latency */ |
| 792 | policy->cpuinfo.transition_latency = 0; |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 793 | for (i = 0; i < perf->state_count; i++) { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 794 | if ((perf->states[i].transition_latency * 1000) > |
| 795 | policy->cpuinfo.transition_latency) |
| 796 | policy->cpuinfo.transition_latency = |
| 797 | perf->states[i].transition_latency * 1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | |
Pallipadi, Venkatesh | a59d163 | 2009-03-19 14:41:40 -0700 | [diff] [blame] | 800 | /* Check for high latency (>20uS) from buggy BIOSes, like on T42 */ |
| 801 | if (perf->control_register.space_id == ACPI_ADR_SPACE_FIXED_HARDWARE && |
| 802 | policy->cpuinfo.transition_latency > 20 * 1000) { |
Pallipadi, Venkatesh | a59d163 | 2009-03-19 14:41:40 -0700 | [diff] [blame] | 803 | policy->cpuinfo.transition_latency = 20 * 1000; |
Joe Perches | b49c22a | 2016-04-05 13:28:24 -0700 | [diff] [blame] | 804 | pr_info_once("P-state transition latency capped at 20 uS\n"); |
Pallipadi, Venkatesh | a59d163 | 2009-03-19 14:41:40 -0700 | [diff] [blame] | 805 | } |
| 806 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | /* table init */ |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 808 | for (i = 0; i < perf->state_count; i++) { |
| 809 | if (i > 0 && perf->states[i].core_frequency >= |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 810 | freq_table[valid_states-1].frequency / 1000) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 811 | continue; |
| 812 | |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 813 | freq_table[valid_states].driver_data = i; |
| 814 | freq_table[valid_states].frequency = |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 815 | perf->states[i].core_frequency * 1000; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 816 | valid_states++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | } |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 818 | freq_table[valid_states].frequency = CPUFREQ_TABLE_END; |
Venkatesh Pallipadi | 8edc59d9 | 2006-12-19 12:58:55 -0800 | [diff] [blame] | 819 | perf->state = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 821 | result = cpufreq_table_validate_and_show(policy, freq_table); |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 822 | if (result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | goto err_freqfree; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | |
Thomas Renninger | d876dfb | 2009-04-17 16:22:08 +0200 | [diff] [blame] | 825 | if (perf->states[0].core_frequency * 1000 != policy->cpuinfo.max_freq) |
Joe Perches | b49c22a | 2016-04-05 13:28:24 -0700 | [diff] [blame] | 826 | pr_warn(FW_WARN "P-state 0 is not max freq\n"); |
Thomas Renninger | d876dfb | 2009-04-17 16:22:08 +0200 | [diff] [blame] | 827 | |
Mattia Dongili | a507ac4 | 2006-12-15 19:52:45 +0100 | [diff] [blame] | 828 | switch (perf->control_register.space_id) { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 829 | case ACPI_ADR_SPACE_SYSTEM_IO: |
Viresh Kumar | 1bab64d | 2013-10-16 23:58:10 +0200 | [diff] [blame] | 830 | /* |
| 831 | * The core will not set policy->cur, because |
| 832 | * cpufreq_driver->get is NULL, so we need to set it here. |
| 833 | * However, we have to guess it, because the current speed is |
| 834 | * unknown and not detectable via IO ports. |
| 835 | */ |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 836 | policy->cur = acpi_cpufreq_guess_freq(data, policy->cpu); |
| 837 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 838 | case ACPI_ADR_SPACE_FIXED_HARDWARE: |
Venkatesh Pallipadi | 7650b28 | 2006-10-03 12:36:30 -0700 | [diff] [blame] | 839 | acpi_cpufreq_driver.get = get_cur_freq_on_cpu; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 840 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 841 | default: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 842 | break; |
| 843 | } |
| 844 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | /* notify BIOS that we exist */ |
| 846 | acpi_processor_notify_smm(THIS_MODULE); |
| 847 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 848 | pr_debug("CPU%u - ACPI performance management activated.\n", cpu); |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 849 | for (i = 0; i < perf->state_count; i++) |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 850 | pr_debug(" %cP%d: %d MHz, %d mW, %d uS\n", |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 851 | (i == perf->state ? '*' : ' '), i, |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 852 | (u32) perf->states[i].core_frequency, |
| 853 | (u32) perf->states[i].power, |
| 854 | (u32) perf->states[i].transition_latency); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | |
Dominik Brodowski | 4b31e77 | 2005-05-18 13:49:00 -0400 | [diff] [blame] | 856 | /* |
| 857 | * the first call to ->target() should result in us actually |
| 858 | * writing something to the appropriate registers. |
| 859 | */ |
| 860 | data->resume = 1; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 861 | |
Rafael J. Wysocki | b7898fd | 2016-03-30 03:47:49 +0200 | [diff] [blame] | 862 | policy->fast_switch_possible = !acpi_pstate_strict && |
| 863 | !(policy_is_shared(policy) && policy->shared_type != CPUFREQ_SHARED_TYPE_ANY); |
| 864 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 865 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 867 | err_freqfree: |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 868 | kfree(freq_table); |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 869 | err_unreg: |
Rafael J. Wysocki | b2f8dc4 | 2015-07-22 22:11:16 +0200 | [diff] [blame] | 870 | acpi_processor_unregister_performance(cpu); |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 871 | err_free_mask: |
| 872 | free_cpumask_var(data->freqdomain_cpus); |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 873 | err_free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | kfree(data); |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 875 | policy->driver_data = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 877 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | } |
| 879 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 880 | static int acpi_cpufreq_cpu_exit(struct cpufreq_policy *policy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | { |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 882 | struct acpi_cpufreq_data *data = policy->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 884 | pr_debug("acpi_cpufreq_cpu_exit\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | |
Viresh Kumar | 9b55f55 | 2016-04-07 14:06:58 +0530 | [diff] [blame] | 886 | policy->fast_switch_possible = false; |
| 887 | policy->driver_data = NULL; |
| 888 | acpi_processor_unregister_performance(data->acpi_perf_cpu); |
| 889 | free_cpumask_var(data->freqdomain_cpus); |
Viresh Kumar | 8cee1ee | 2016-04-07 14:06:57 +0530 | [diff] [blame] | 890 | kfree(policy->freq_table); |
Viresh Kumar | 9b55f55 | 2016-04-07 14:06:58 +0530 | [diff] [blame] | 891 | kfree(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 893 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | } |
| 895 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 896 | static int acpi_cpufreq_resume(struct cpufreq_policy *policy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | { |
Pan Xinhui | eb0b3e7 | 2015-07-07 20:43:26 +0800 | [diff] [blame] | 898 | struct acpi_cpufreq_data *data = policy->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 900 | pr_debug("acpi_cpufreq_resume\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | |
| 902 | data->resume = 1; |
| 903 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 904 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | } |
| 906 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 907 | static struct freq_attr *acpi_cpufreq_attr[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | &cpufreq_freq_attr_scaling_available_freqs, |
Lan Tianyu | f4fd379 | 2013-06-27 15:08:54 +0800 | [diff] [blame] | 909 | &freqdomain_cpus, |
Rafael J. Wysocki | f56c50e | 2015-07-22 22:12:10 +0200 | [diff] [blame] | 910 | #ifdef CONFIG_X86_ACPI_CPUFREQ_CPB |
| 911 | &cpb, |
| 912 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | NULL, |
| 914 | }; |
| 915 | |
| 916 | static struct cpufreq_driver acpi_cpufreq_driver = { |
Viresh Kumar | db9be21 | 2013-10-03 20:27:56 +0530 | [diff] [blame] | 917 | .verify = cpufreq_generic_frequency_table_verify, |
Viresh Kumar | 9c0ebcf | 2013-10-25 19:45:48 +0530 | [diff] [blame] | 918 | .target_index = acpi_cpufreq_target, |
Rafael J. Wysocki | b7898fd | 2016-03-30 03:47:49 +0200 | [diff] [blame] | 919 | .fast_switch = acpi_cpufreq_fast_switch, |
Thomas Renninger | e2f74f3 | 2009-11-19 12:31:01 +0100 | [diff] [blame] | 920 | .bios_limit = acpi_processor_get_bios_limit, |
| 921 | .init = acpi_cpufreq_cpu_init, |
| 922 | .exit = acpi_cpufreq_cpu_exit, |
| 923 | .resume = acpi_cpufreq_resume, |
| 924 | .name = "acpi-cpufreq", |
Thomas Renninger | e2f74f3 | 2009-11-19 12:31:01 +0100 | [diff] [blame] | 925 | .attr = acpi_cpufreq_attr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | }; |
| 927 | |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 928 | static void __init acpi_cpufreq_boost_init(void) |
| 929 | { |
| 930 | if (boot_cpu_has(X86_FEATURE_CPB) || boot_cpu_has(X86_FEATURE_IDA)) { |
| 931 | msrs = msrs_alloc(); |
| 932 | |
| 933 | if (!msrs) |
| 934 | return; |
| 935 | |
Rafael J. Wysocki | 7a6c79f | 2015-12-27 00:27:38 +0100 | [diff] [blame] | 936 | acpi_cpufreq_driver.set_boost = set_boost; |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 937 | acpi_cpufreq_driver.boost_enabled = boost_state(0); |
Srivatsa S. Bhat | 0197fbd | 2014-03-11 02:10:06 +0530 | [diff] [blame] | 938 | |
| 939 | cpu_notifier_register_begin(); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 940 | |
| 941 | /* Force all MSRs to the same value */ |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 942 | boost_set_msrs(acpi_cpufreq_driver.boost_enabled, |
| 943 | cpu_online_mask); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 944 | |
Srivatsa S. Bhat | 0197fbd | 2014-03-11 02:10:06 +0530 | [diff] [blame] | 945 | __register_cpu_notifier(&boost_nb); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 946 | |
Srivatsa S. Bhat | 0197fbd | 2014-03-11 02:10:06 +0530 | [diff] [blame] | 947 | cpu_notifier_register_done(); |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 948 | } |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 949 | } |
| 950 | |
Konrad Rzeszutek Wilk | eb8c68e | 2014-01-27 22:50:35 -0500 | [diff] [blame] | 951 | static void acpi_cpufreq_boost_exit(void) |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 952 | { |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 953 | if (msrs) { |
| 954 | unregister_cpu_notifier(&boost_nb); |
| 955 | |
| 956 | msrs_free(msrs); |
| 957 | msrs = NULL; |
| 958 | } |
| 959 | } |
| 960 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 961 | static int __init acpi_cpufreq_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | { |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 963 | int ret; |
| 964 | |
Rafael J. Wysocki | 75c0758 | 2013-10-25 16:22:47 +0200 | [diff] [blame] | 965 | if (acpi_disabled) |
| 966 | return -ENODEV; |
| 967 | |
Yinghai Lu | 8a61e12 | 2013-09-20 10:43:56 -0700 | [diff] [blame] | 968 | /* don't keep reloading if cpufreq_driver exists */ |
| 969 | if (cpufreq_get_current_driver()) |
Rafael J. Wysocki | 75c0758 | 2013-10-25 16:22:47 +0200 | [diff] [blame] | 970 | return -EEXIST; |
Yinghai Lu | ee29753 | 2008-09-24 19:04:31 -0700 | [diff] [blame] | 971 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 972 | pr_debug("acpi_cpufreq_init\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 974 | ret = acpi_cpufreq_early_init(); |
| 975 | if (ret) |
| 976 | return ret; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 977 | |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 978 | #ifdef CONFIG_X86_ACPI_CPUFREQ_CPB |
| 979 | /* this is a sysfs file with a strange name and an even stranger |
| 980 | * semantic - per CPU instantiation, but system global effect. |
| 981 | * Lets enable it only on AMD CPUs for compatibility reasons and |
| 982 | * only if configured. This is considered legacy code, which |
| 983 | * will probably be removed at some point in the future. |
| 984 | */ |
Rafael J. Wysocki | f56c50e | 2015-07-22 22:12:10 +0200 | [diff] [blame] | 985 | if (!check_amd_hwpstate_cpu(0)) { |
| 986 | struct freq_attr **attr; |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 987 | |
Rafael J. Wysocki | f56c50e | 2015-07-22 22:12:10 +0200 | [diff] [blame] | 988 | pr_debug("CPB unsupported, do not expose it\n"); |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 989 | |
Rafael J. Wysocki | f56c50e | 2015-07-22 22:12:10 +0200 | [diff] [blame] | 990 | for (attr = acpi_cpufreq_attr; *attr; attr++) |
| 991 | if (*attr == &cpb) { |
| 992 | *attr = NULL; |
| 993 | break; |
| 994 | } |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 995 | } |
| 996 | #endif |
Lukasz Majewski | cfc9c8e | 2013-12-20 15:24:50 +0100 | [diff] [blame] | 997 | acpi_cpufreq_boost_init(); |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 998 | |
Akinobu Mita | 847aef6 | 2008-07-14 11:59:44 +0900 | [diff] [blame] | 999 | ret = cpufreq_register_driver(&acpi_cpufreq_driver); |
Konrad Rzeszutek Wilk | eb8c68e | 2014-01-27 22:50:35 -0500 | [diff] [blame] | 1000 | if (ret) { |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 1001 | free_acpi_perf_data(); |
Konrad Rzeszutek Wilk | eb8c68e | 2014-01-27 22:50:35 -0500 | [diff] [blame] | 1002 | acpi_cpufreq_boost_exit(); |
| 1003 | } |
Akinobu Mita | 847aef6 | 2008-07-14 11:59:44 +0900 | [diff] [blame] | 1004 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | } |
| 1006 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 1007 | static void __exit acpi_cpufreq_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 1009 | pr_debug("acpi_cpufreq_exit\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 1011 | acpi_cpufreq_boost_exit(); |
| 1012 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | cpufreq_unregister_driver(&acpi_cpufreq_driver); |
| 1014 | |
Luming Yu | 50f4ddd | 2011-07-08 16:37:44 -0400 | [diff] [blame] | 1015 | free_acpi_perf_data(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | } |
| 1017 | |
Venkatesh Pallipadi | d395bf1 | 2005-08-25 15:59:00 -0400 | [diff] [blame] | 1018 | module_param(acpi_pstate_strict, uint, 0644); |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 1019 | MODULE_PARM_DESC(acpi_pstate_strict, |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 1020 | "value 0 or non-zero. non-zero -> strict ACPI checks are " |
| 1021 | "performed during frequency changes."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | |
| 1023 | late_initcall(acpi_cpufreq_init); |
| 1024 | module_exit(acpi_cpufreq_exit); |
| 1025 | |
Matthew Garrett | efa1719 | 2013-01-22 22:33:46 +0100 | [diff] [blame] | 1026 | static const struct x86_cpu_id acpi_cpufreq_ids[] = { |
| 1027 | X86_FEATURE_MATCH(X86_FEATURE_ACPI), |
| 1028 | X86_FEATURE_MATCH(X86_FEATURE_HW_PSTATE), |
| 1029 | {} |
| 1030 | }; |
| 1031 | MODULE_DEVICE_TABLE(x86cpu, acpi_cpufreq_ids); |
| 1032 | |
Rafael J. Wysocki | c655aff | 2013-06-07 13:13:31 +0200 | [diff] [blame] | 1033 | static const struct acpi_device_id processor_device_ids[] = { |
| 1034 | {ACPI_PROCESSOR_OBJECT_HID, }, |
| 1035 | {ACPI_PROCESSOR_DEVICE_HID, }, |
| 1036 | {}, |
| 1037 | }; |
| 1038 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); |
| 1039 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | MODULE_ALIAS("acpi"); |