Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * acpi_processor.c - ACPI Processor Driver ($Revision: 71 $) |
| 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) 2004 Dominik Brodowski <linux@brodo.de> |
| 7 | * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> |
| 8 | * - Added processor hotplug support |
| 9 | * |
| 10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or (at |
| 15 | * your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, but |
| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 20 | * General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License along |
| 23 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 24 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 25 | * |
| 26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 27 | * TBD: |
| 28 | * 1. Make # power states dynamic. |
| 29 | * 2. Support duty_cycle values that span bit 4. |
| 30 | * 3. Optimize by having scheduler determine business instead of |
| 31 | * having us try to calculate it here. |
| 32 | * 4. Need C1 timing -- must modify kernel (IRQ handler) to get this. |
| 33 | */ |
| 34 | |
| 35 | #include <linux/kernel.h> |
| 36 | #include <linux/module.h> |
| 37 | #include <linux/init.h> |
| 38 | #include <linux/types.h> |
| 39 | #include <linux/pci.h> |
| 40 | #include <linux/pm.h> |
| 41 | #include <linux/cpufreq.h> |
| 42 | #include <linux/cpu.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <linux/dmi.h> |
| 44 | #include <linux/moduleparam.h> |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 45 | #include <linux/cpuidle.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 46 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | #include <asm/io.h> |
| 49 | #include <asm/system.h> |
| 50 | #include <asm/cpu.h> |
| 51 | #include <asm/delay.h> |
| 52 | #include <asm/uaccess.h> |
| 53 | #include <asm/processor.h> |
| 54 | #include <asm/smp.h> |
| 55 | #include <asm/acpi.h> |
| 56 | |
| 57 | #include <acpi/acpi_bus.h> |
| 58 | #include <acpi/acpi_drivers.h> |
| 59 | #include <acpi/processor.h> |
| 60 | |
Len Brown | a192a95 | 2009-07-28 16:45:54 -0400 | [diff] [blame] | 61 | #define PREFIX "ACPI: " |
| 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | #define ACPI_PROCESSOR_CLASS "processor" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #define ACPI_PROCESSOR_DEVICE_NAME "Processor" |
| 65 | #define ACPI_PROCESSOR_FILE_INFO "info" |
| 66 | #define ACPI_PROCESSOR_FILE_THROTTLING "throttling" |
| 67 | #define ACPI_PROCESSOR_FILE_LIMIT "limit" |
| 68 | #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 |
| 69 | #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 70 | #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
| 72 | #define ACPI_PROCESSOR_LIMIT_USER 0 |
| 73 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 |
| 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
Alex Chiang | 0131aa3 | 2010-02-22 12:11:08 -0700 | [diff] [blame] | 76 | ACPI_MODULE_NAME("processor_driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 78 | MODULE_AUTHOR("Paul Diefenbaugh"); |
Len Brown | 7cda93e | 2007-02-12 23:50:02 -0500 | [diff] [blame] | 79 | MODULE_DESCRIPTION("ACPI Processor Driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | MODULE_LICENSE("GPL"); |
| 81 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 82 | static int acpi_processor_add(struct acpi_device *device); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 83 | static int acpi_processor_remove(struct acpi_device *device, int type); |
Bjorn Helgaas | 7ec0a72 | 2009-03-30 17:48:24 +0000 | [diff] [blame] | 84 | static void acpi_processor_notify(struct acpi_device *device, u32 event); |
Thomas Renninger | 3bd81a8 | 2012-01-17 22:40:07 +0100 | [diff] [blame] | 85 | static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | static int acpi_processor_handle_eject(struct acpi_processor *pr); |
Thomas Renninger | 99b7250 | 2012-01-19 18:18:43 +0100 | [diff] [blame] | 87 | static int acpi_processor_start(struct acpi_processor *pr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 89 | static const struct acpi_device_id processor_device_ids[] = { |
Myron Stowe | ad93a76 | 2008-11-04 14:52:55 -0700 | [diff] [blame] | 90 | {ACPI_PROCESSOR_OBJECT_HID, 0}, |
Bjorn Helgaas | 9eccbc2 | 2009-04-27 16:33:46 -0600 | [diff] [blame] | 91 | {"ACPI0007", 0}, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 92 | {"", 0}, |
| 93 | }; |
| 94 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); |
| 95 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | static struct acpi_driver acpi_processor_driver = { |
Len Brown | c2b6705b | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 97 | .name = "processor", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 98 | .class = ACPI_PROCESSOR_CLASS, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 99 | .ids = processor_device_ids, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 100 | .ops = { |
| 101 | .add = acpi_processor_add, |
| 102 | .remove = acpi_processor_remove, |
Thomas Gleixner | b04e7bd | 2007-09-22 22:29:05 +0000 | [diff] [blame] | 103 | .suspend = acpi_processor_suspend, |
| 104 | .resume = acpi_processor_resume, |
Bjorn Helgaas | 7ec0a72 | 2009-03-30 17:48:24 +0000 | [diff] [blame] | 105 | .notify = acpi_processor_notify, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 106 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | }; |
| 108 | |
| 109 | #define INSTALL_NOTIFY_HANDLER 1 |
| 110 | #define UNINSTALL_NOTIFY_HANDLER 2 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 112 | DEFINE_PER_CPU(struct acpi_processor *, processors); |
Naga Chumbalkar | 0f1d683 | 2009-12-17 20:18:27 +0000 | [diff] [blame] | 113 | EXPORT_PER_CPU_SYMBOL(processors); |
| 114 | |
Andreas Mohr | 9f22271 | 2006-06-23 02:04:27 -0700 | [diff] [blame] | 115 | struct acpi_processor_errata errata __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | /* -------------------------------------------------------------------------- |
| 118 | Errata Handling |
| 119 | -------------------------------------------------------------------------- */ |
| 120 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 121 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 123 | u8 value1 = 0; |
| 124 | u8 value2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
| 127 | if (!dev) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 128 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
| 130 | /* |
| 131 | * Note that 'dev' references the PIIX4 ACPI Controller. |
| 132 | */ |
| 133 | |
Auke Kok | 44c1013 | 2007-06-08 15:46:36 -0700 | [diff] [blame] | 134 | switch (dev->revision) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | case 0: |
| 136 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); |
| 137 | break; |
| 138 | case 1: |
| 139 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); |
| 140 | break; |
| 141 | case 2: |
| 142 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); |
| 143 | break; |
| 144 | case 3: |
| 145 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); |
| 146 | break; |
| 147 | default: |
| 148 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); |
| 149 | break; |
| 150 | } |
| 151 | |
Auke Kok | 44c1013 | 2007-06-08 15:46:36 -0700 | [diff] [blame] | 152 | switch (dev->revision) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
| 154 | case 0: /* PIIX4 A-step */ |
| 155 | case 1: /* PIIX4 B-step */ |
| 156 | /* |
| 157 | * See specification changes #13 ("Manual Throttle Duty Cycle") |
| 158 | * and #14 ("Enabling and Disabling Manual Throttle"), plus |
| 159 | * erratum #5 ("STPCLK# Deassertion Time") from the January |
| 160 | * 2002 PIIX4 specification update. Applies to only older |
| 161 | * PIIX4 models. |
| 162 | */ |
| 163 | errata.piix4.throttle = 1; |
| 164 | |
| 165 | case 2: /* PIIX4E */ |
| 166 | case 3: /* PIIX4M */ |
| 167 | /* |
| 168 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA |
| 169 | * Livelock") from the January 2002 PIIX4 specification update. |
| 170 | * Applies to all PIIX4 models. |
| 171 | */ |
| 172 | |
| 173 | /* |
| 174 | * BM-IDE |
| 175 | * ------ |
| 176 | * Find the PIIX4 IDE Controller and get the Bus Master IDE |
| 177 | * Status register address. We'll use this later to read |
| 178 | * each IDE controller's DMA status to make sure we catch all |
| 179 | * DMA activity. |
| 180 | */ |
| 181 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 182 | PCI_DEVICE_ID_INTEL_82371AB, |
| 183 | PCI_ANY_ID, PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | if (dev) { |
| 185 | errata.piix4.bmisx = pci_resource_start(dev, 4); |
| 186 | pci_dev_put(dev); |
| 187 | } |
| 188 | |
| 189 | /* |
| 190 | * Type-F DMA |
| 191 | * ---------- |
| 192 | * Find the PIIX4 ISA Controller and read the Motherboard |
| 193 | * DMA controller's status to see if Type-F (Fast) DMA mode |
| 194 | * is enabled (bit 7) on either channel. Note that we'll |
| 195 | * disable C3 support if this is enabled, as some legacy |
| 196 | * devices won't operate well if fast DMA is disabled. |
| 197 | */ |
| 198 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 199 | PCI_DEVICE_ID_INTEL_82371AB_0, |
| 200 | PCI_ANY_ID, PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | if (dev) { |
| 202 | pci_read_config_byte(dev, 0x76, &value1); |
| 203 | pci_read_config_byte(dev, 0x77, &value2); |
| 204 | if ((value1 & 0x80) || (value2 & 0x80)) |
| 205 | errata.piix4.fdma = 1; |
| 206 | pci_dev_put(dev); |
| 207 | } |
| 208 | |
| 209 | break; |
| 210 | } |
| 211 | |
| 212 | if (errata.piix4.bmisx) |
| 213 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 214 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | if (errata.piix4.fdma) |
| 216 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 217 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 219 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } |
| 221 | |
Adrian Bunk | 8713cbe | 2005-09-02 17:16:48 -0400 | [diff] [blame] | 222 | static int acpi_processor_errata(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 224 | int result = 0; |
| 225 | struct pci_dev *dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | |
| 228 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 229 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
| 231 | /* |
| 232 | * PIIX4 |
| 233 | */ |
| 234 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 235 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
| 236 | PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | if (dev) { |
| 238 | result = acpi_processor_errata_piix4(dev); |
| 239 | pci_dev_put(dev); |
| 240 | } |
| 241 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 242 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | } |
| 244 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | /* -------------------------------------------------------------------------- |
| 246 | Driver Interface |
| 247 | -------------------------------------------------------------------------- */ |
| 248 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 249 | static int acpi_processor_get_info(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 251 | acpi_status status = 0; |
| 252 | union acpi_object object = { 0 }; |
| 253 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 254 | struct acpi_processor *pr; |
| 255 | int cpu_index, device_declaration = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 256 | static int cpu0_initialized; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 258 | pr = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 260 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
| 262 | if (num_online_cpus() > 1) |
| 263 | errata.smp = TRUE; |
| 264 | |
| 265 | acpi_processor_errata(pr); |
| 266 | |
| 267 | /* |
| 268 | * Check to see if we have bus mastering arbitration control. This |
| 269 | * is required for proper C3 usage (to maintain cache coherency). |
| 270 | */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 271 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | pr->flags.bm_control = 1; |
| 273 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 274 | "Bus mastering arbitration control present\n")); |
| 275 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 277 | "No bus mastering arbitration control\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | |
Bjorn Helgaas | 6cc73b4 | 2009-04-27 16:33:41 -0600 | [diff] [blame] | 279 | if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) { |
| 280 | /* Declared with "Processor" statement; match ProcessorID */ |
| 281 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); |
| 282 | if (ACPI_FAILURE(status)) { |
| 283 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); |
| 284 | return -ENODEV; |
| 285 | } |
| 286 | |
| 287 | /* |
| 288 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. |
| 289 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in |
| 290 | * arch/xxx/acpi.c |
| 291 | */ |
| 292 | pr->acpi_id = object.processor.proc_id; |
| 293 | } else { |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 294 | /* |
| 295 | * Declared with "Device" statement; match _UID. |
| 296 | * Note that we don't handle string _UIDs yet. |
| 297 | */ |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 298 | unsigned long long value; |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 299 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, |
| 300 | NULL, &value); |
| 301 | if (ACPI_FAILURE(status)) { |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 302 | printk(KERN_ERR PREFIX |
| 303 | "Evaluating processor _UID [%#x]\n", status); |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 304 | return -ENODEV; |
| 305 | } |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 306 | device_declaration = 1; |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 307 | pr->acpi_id = value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | } |
Alex Chiang | 2e9d5e4 | 2010-02-22 12:11:19 -0700 | [diff] [blame] | 309 | cpu_index = acpi_get_cpuid(pr->handle, device_declaration, pr->acpi_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 311 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
Ashok Raj | df42baa | 2006-03-28 17:04:00 -0500 | [diff] [blame] | 312 | if (!cpu0_initialized && (cpu_index == -1) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 313 | (num_online_cpus() == 1)) { |
| 314 | cpu_index = 0; |
| 315 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 317 | cpu0_initialized = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 319 | pr->id = cpu_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 321 | /* |
| 322 | * Extra Processor objects may be enumerated on MP systems with |
| 323 | * less than the max # of CPUs. They should be ignored _iff |
| 324 | * they are physically not present. |
| 325 | */ |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 326 | if (pr->id == -1) { |
Thomas Renninger | 3bd81a8 | 2012-01-17 22:40:07 +0100 | [diff] [blame] | 327 | if (ACPI_FAILURE(acpi_processor_hotadd_init(pr))) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 328 | return -ENODEV; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 329 | } |
Zhao Yakui | 7a04b84 | 2009-06-24 11:46:44 +0800 | [diff] [blame] | 330 | /* |
| 331 | * On some boxes several processors use the same processor bus id. |
| 332 | * But they are located in different scope. For example: |
| 333 | * \_SB.SCK0.CPU0 |
| 334 | * \_SB.SCK1.CPU0 |
| 335 | * Rename the processor device bus id. And the new bus id will be |
| 336 | * generated as the following format: |
| 337 | * CPU+CPU ID. |
| 338 | */ |
| 339 | sprintf(acpi_device_bid(device), "CPU%X", pr->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 341 | pr->acpi_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
| 343 | if (!object.processor.pblk_address) |
| 344 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); |
| 345 | else if (object.processor.pblk_length != 6) |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 346 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
| 347 | object.processor.pblk_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | else { |
| 349 | pr->throttling.address = object.processor.pblk_address; |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 350 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
| 351 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | |
| 353 | pr->pblk = object.processor.pblk_address; |
| 354 | |
| 355 | /* |
| 356 | * We don't care about error returns - we just try to mark |
| 357 | * these reserved so that nobody else is confused into thinking |
| 358 | * that this region might be unused.. |
| 359 | * |
| 360 | * (In particular, allocating the IO range for Cardbus) |
| 361 | */ |
| 362 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); |
| 363 | } |
| 364 | |
Alex Chiang | fe086a7 | 2008-04-29 15:05:29 -0700 | [diff] [blame] | 365 | /* |
| 366 | * If ACPI describes a slot number for this CPU, we can use it |
| 367 | * ensure we get the right value in the "physical id" field |
| 368 | * of /proc/cpuinfo |
| 369 | */ |
| 370 | status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); |
| 371 | if (ACPI_SUCCESS(status)) |
| 372 | arch_fix_phys_package_id(pr->id, object.integer.value); |
| 373 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 374 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | } |
| 376 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 377 | static DEFINE_PER_CPU(void *, processor_device_array); |
Venkatesh Pallipadi | cd8e2b4 | 2005-10-21 19:22:00 -0400 | [diff] [blame] | 378 | |
Bjorn Helgaas | 7ec0a72 | 2009-03-30 17:48:24 +0000 | [diff] [blame] | 379 | static void acpi_processor_notify(struct acpi_device *device, u32 event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | { |
Bjorn Helgaas | 7ec0a72 | 2009-03-30 17:48:24 +0000 | [diff] [blame] | 381 | struct acpi_processor *pr = acpi_driver_data(device); |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 382 | int saved; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | |
| 384 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 385 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | switch (event) { |
| 388 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 389 | saved = pr->performance_platform_limit; |
Zhao Yakui | d81c45e | 2009-10-16 09:20:41 +0800 | [diff] [blame] | 390 | acpi_processor_ppc_has_changed(pr, 1); |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 391 | if (saved == pr->performance_platform_limit) |
| 392 | break; |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 393 | acpi_bus_generate_proc_event(device, event, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 394 | pr->performance_platform_limit); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 395 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 396 | dev_name(&device->dev), event, |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 397 | pr->performance_platform_limit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | break; |
| 399 | case ACPI_PROCESSOR_NOTIFY_POWER: |
| 400 | acpi_processor_cst_has_changed(pr); |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 401 | acpi_bus_generate_proc_event(device, event, 0); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 402 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 403 | dev_name(&device->dev), event, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | break; |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 405 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
| 406 | acpi_processor_tstate_has_changed(pr); |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 407 | acpi_bus_generate_proc_event(device, event, 0); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 408 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 409 | dev_name(&device->dev), event, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | default: |
| 411 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 412 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | break; |
| 414 | } |
| 415 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 416 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | } |
| 418 | |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 419 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
| 420 | unsigned long action, void *hcpu) |
| 421 | { |
| 422 | unsigned int cpu = (unsigned long)hcpu; |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 423 | struct acpi_processor *pr = per_cpu(processors, cpu); |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 424 | |
| 425 | if (action == CPU_ONLINE && pr) { |
Thomas Renninger | 99b7250 | 2012-01-19 18:18:43 +0100 | [diff] [blame] | 426 | /* CPU got physically hotplugged and onlined the first time: |
| 427 | * Initialize missing things |
| 428 | */ |
| 429 | if (pr->flags.need_hotplug_init) { |
| 430 | struct cpuidle_driver *idle_driver = |
| 431 | cpuidle_get_driver(); |
| 432 | |
| 433 | printk(KERN_INFO "Will online and init hotplugged " |
| 434 | "CPU: %d\n", pr->id); |
| 435 | WARN(acpi_processor_start(pr), "Failed to start CPU:" |
| 436 | " %d\n", pr->id); |
| 437 | pr->flags.need_hotplug_init = 0; |
| 438 | if (idle_driver && !strcmp(idle_driver->name, |
| 439 | "intel_idle")) { |
| 440 | intel_idle_cpu_init(pr->id); |
| 441 | } |
| 442 | /* Normal CPU soft online event */ |
| 443 | } else { |
| 444 | acpi_processor_ppc_has_changed(pr, 0); |
| 445 | acpi_processor_cst_has_changed(pr); |
| 446 | acpi_processor_reevaluate_tstate(pr, action); |
| 447 | acpi_processor_tstate_has_changed(pr); |
| 448 | } |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 449 | } |
Zhao Yakui | 5a344a5 | 2011-01-10 16:35:45 +0800 | [diff] [blame] | 450 | if (action == CPU_DEAD && pr) { |
| 451 | /* invalidate the flag.throttling after one CPU is offline */ |
| 452 | acpi_processor_reevaluate_tstate(pr, action); |
| 453 | } |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 454 | return NOTIFY_OK; |
| 455 | } |
| 456 | |
| 457 | static struct notifier_block acpi_cpu_notifier = |
| 458 | { |
| 459 | .notifier_call = acpi_cpu_soft_notify, |
| 460 | }; |
| 461 | |
Thomas Renninger | 99b7250 | 2012-01-19 18:18:43 +0100 | [diff] [blame] | 462 | /* |
| 463 | * acpi_processor_start() is called by the cpu_hotplug_notifier func: |
| 464 | * acpi_cpu_soft_notify(). Getting it __cpuinit{data} is difficult, the |
| 465 | * root cause seem to be that acpi_processor_uninstall_hotplug_notify() |
| 466 | * is in the module_exit (__exit) func. Allowing acpi_processor_start() |
| 467 | * to not be in __cpuinit section, but being called from __cpuinit funcs |
| 468 | * via __ref looks like the right thing to do here. |
| 469 | */ |
| 470 | static __ref int acpi_processor_start(struct acpi_processor *pr) |
Thomas Renninger | 54d5dcc | 2012-01-19 18:18:42 +0100 | [diff] [blame] | 471 | { |
| 472 | struct acpi_device *device = per_cpu(processor_device_array, pr->id); |
| 473 | int result = 0; |
| 474 | |
| 475 | #ifdef CONFIG_CPU_FREQ |
| 476 | acpi_processor_ppc_has_changed(pr, 0); |
| 477 | #endif |
| 478 | acpi_processor_get_throttling_info(pr); |
| 479 | acpi_processor_get_limit_info(pr); |
| 480 | |
| 481 | if (!cpuidle_get_driver() || cpuidle_get_driver() == &acpi_idle_driver) |
| 482 | acpi_processor_power_init(pr, device); |
| 483 | |
| 484 | pr->cdev = thermal_cooling_device_register("Processor", device, |
| 485 | &processor_cooling_ops); |
| 486 | if (IS_ERR(pr->cdev)) { |
| 487 | result = PTR_ERR(pr->cdev); |
| 488 | goto err_power_exit; |
| 489 | } |
| 490 | |
| 491 | dev_dbg(&device->dev, "registered as cooling_device%d\n", |
| 492 | pr->cdev->id); |
| 493 | |
| 494 | result = sysfs_create_link(&device->dev.kobj, |
| 495 | &pr->cdev->device.kobj, |
| 496 | "thermal_cooling"); |
| 497 | if (result) { |
| 498 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
| 499 | goto err_thermal_unregister; |
| 500 | } |
| 501 | result = sysfs_create_link(&pr->cdev->device.kobj, |
| 502 | &device->dev.kobj, |
| 503 | "device"); |
| 504 | if (result) { |
| 505 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
| 506 | goto err_remove_sysfs_thermal; |
| 507 | } |
| 508 | |
| 509 | return 0; |
| 510 | |
| 511 | err_remove_sysfs_thermal: |
| 512 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); |
| 513 | err_thermal_unregister: |
| 514 | thermal_cooling_device_unregister(pr->cdev); |
| 515 | err_power_exit: |
| 516 | acpi_processor_power_exit(pr, device); |
| 517 | |
| 518 | return result; |
| 519 | } |
| 520 | |
Thomas Renninger | 99b7250 | 2012-01-19 18:18:43 +0100 | [diff] [blame] | 521 | /* |
| 522 | * Do not put anything in here which needs the core to be online. |
| 523 | * For example MSR access or setting up things which check for cpuinfo_x86 |
| 524 | * (cpu_data(cpu)) values, like CPU feature flags, family, model, etc. |
| 525 | * Such things have to be put in and set up above in acpi_processor_start() |
| 526 | */ |
Rakib Mullick | 941b10f | 2009-11-05 16:51:40 -0500 | [diff] [blame] | 527 | static int __cpuinit acpi_processor_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 529 | struct acpi_processor *pr = NULL; |
Bjorn Helgaas | 970b049 | 2009-06-22 20:41:19 +0000 | [diff] [blame] | 530 | int result = 0; |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 531 | struct device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 533 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 535 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | |
Yinghai Lu | eaa9584 | 2009-06-06 14:51:36 -0700 | [diff] [blame] | 537 | if (!zalloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) { |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 538 | kfree(pr); |
| 539 | return -ENOMEM; |
| 540 | } |
| 541 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | pr->handle = device->handle; |
| 543 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); |
| 544 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 545 | device->driver_data = pr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | result = acpi_processor_get_info(device); |
| 548 | if (result) { |
| 549 | /* Processor is physically not present */ |
| 550 | return 0; |
| 551 | } |
| 552 | |
Thomas Renninger | 75cbfb9 | 2010-05-26 17:03:33 +0200 | [diff] [blame] | 553 | #ifdef CONFIG_SMP |
| 554 | if (pr->id >= setup_max_cpus && pr->id != 0) |
| 555 | return 0; |
| 556 | #endif |
| 557 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); |
| 559 | |
| 560 | /* |
| 561 | * Buggy BIOS check |
| 562 | * ACPI id of processors can be reported wrongly by the BIOS. |
| 563 | * Don't trust it blindly |
| 564 | */ |
| 565 | if (per_cpu(processor_device_array, pr->id) != NULL && |
| 566 | per_cpu(processor_device_array, pr->id) != device) { |
| 567 | printk(KERN_WARNING "BIOS reported wrong ACPI id " |
| 568 | "for the processor\n"); |
Bjorn Helgaas | 970b049 | 2009-06-22 20:41:19 +0000 | [diff] [blame] | 569 | result = -ENODEV; |
| 570 | goto err_free_cpumask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | } |
| 572 | per_cpu(processor_device_array, pr->id) = device; |
| 573 | |
| 574 | per_cpu(processors, pr->id) = pr; |
| 575 | |
Kay Sievers | 8a25a2f | 2011-12-21 14:29:42 -0800 | [diff] [blame] | 576 | dev = get_cpu_device(pr->id); |
| 577 | if (sysfs_create_link(&device->dev.kobj, &dev->kobj, "sysdev")) { |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 578 | result = -EFAULT; |
Zhang Rui | cef6e8a | 2010-12-06 15:04:15 +0800 | [diff] [blame] | 579 | goto err_free_cpumask; |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 580 | } |
Thomas Renninger | 99b7250 | 2012-01-19 18:18:43 +0100 | [diff] [blame] | 581 | |
| 582 | /* |
| 583 | * Do not start hotplugged CPUs now, but when they |
| 584 | * are onlined the first time |
| 585 | */ |
| 586 | if (pr->flags.need_hotplug_init) |
| 587 | return 0; |
| 588 | |
| 589 | /* |
| 590 | * Do not start hotplugged CPUs now, but when they |
| 591 | * are onlined the first time |
| 592 | */ |
| 593 | if (pr->flags.need_hotplug_init) |
| 594 | return 0; |
| 595 | |
Thomas Renninger | 54d5dcc | 2012-01-19 18:18:42 +0100 | [diff] [blame] | 596 | result = acpi_processor_start(pr); |
| 597 | if (result) |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 598 | goto err_remove_sysfs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 600 | return 0; |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 601 | |
| 602 | err_remove_sysfs: |
Thomas Renninger | 3333ea7 | 2011-11-17 23:37:00 +0100 | [diff] [blame] | 603 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
Bjorn Helgaas | 970b049 | 2009-06-22 20:41:19 +0000 | [diff] [blame] | 604 | err_free_cpumask: |
| 605 | free_cpumask_var(pr->throttling.shared_cpu_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | |
| 607 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | } |
| 609 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 610 | static int acpi_processor_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 612 | struct acpi_processor *pr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | |
| 615 | if (!device || !acpi_driver_data(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 616 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 618 | pr = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 620 | if (pr->id >= nr_cpu_ids) |
| 621 | goto free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | |
| 623 | if (type == ACPI_BUS_REMOVAL_EJECT) { |
| 624 | if (acpi_processor_handle_eject(pr)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 625 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | } |
| 627 | |
| 628 | acpi_processor_power_exit(pr, device); |
| 629 | |
Zhang Rui | 9f1eb99 | 2008-04-29 02:36:07 -0400 | [diff] [blame] | 630 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
| 631 | |
Zhao Yakui | f28bb45 | 2008-02-15 08:34:37 +0800 | [diff] [blame] | 632 | if (pr->cdev) { |
| 633 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); |
| 634 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); |
| 635 | thermal_cooling_device_unregister(pr->cdev); |
| 636 | pr->cdev = NULL; |
| 637 | } |
Zhang Rui | d9460fd2 | 2008-01-17 15:51:23 +0800 | [diff] [blame] | 638 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 639 | per_cpu(processors, pr->id) = NULL; |
| 640 | per_cpu(processor_device_array, pr->id) = NULL; |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 641 | |
| 642 | free: |
| 643 | free_cpumask_var(pr->throttling.shared_cpu_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | kfree(pr); |
| 645 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 646 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | } |
| 648 | |
| 649 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 650 | /**************************************************************************** |
| 651 | * Acpi processor hotplug support * |
| 652 | ****************************************************************************/ |
| 653 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 654 | static int is_processor_present(acpi_handle handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 656 | acpi_status status; |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 657 | unsigned long long sta = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | |
| 660 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); |
Zhang Rui | cfaf374 | 2008-01-09 02:17:47 -0500 | [diff] [blame] | 661 | |
| 662 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) |
| 663 | return 1; |
| 664 | |
Zhang Rui | d0ce46f | 2008-02-23 01:53:09 -0500 | [diff] [blame] | 665 | /* |
| 666 | * _STA is mandatory for a processor that supports hot plug |
| 667 | */ |
| 668 | if (status == AE_NOT_FOUND) |
| 669 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 670 | "Processor does not support hot plug\n")); |
| 671 | else |
| 672 | ACPI_EXCEPTION((AE_INFO, status, |
| 673 | "Processor Device is not present")); |
Zhang Rui | cfaf374 | 2008-01-09 02:17:47 -0500 | [diff] [blame] | 674 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | } |
| 676 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | static |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 678 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 680 | acpi_handle phandle; |
| 681 | struct acpi_device *pdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | |
| 684 | if (acpi_get_parent(handle, &phandle)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 685 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | } |
| 687 | |
| 688 | if (acpi_bus_get_device(phandle, &pdev)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 689 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | } |
| 691 | |
| 692 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 693 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | } |
| 695 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 696 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | } |
| 698 | |
Jan Beulich | 6430c9c | 2011-02-17 16:33:53 +0000 | [diff] [blame] | 699 | static void acpi_processor_hotplug_notify(acpi_handle handle, |
| 700 | u32 event, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 702 | struct acpi_processor *pr; |
| 703 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | int result; |
| 705 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | |
| 707 | switch (event) { |
| 708 | case ACPI_NOTIFY_BUS_CHECK: |
| 709 | case ACPI_NOTIFY_DEVICE_CHECK: |
Glauber Costa | d6f882e | 2008-03-04 15:06:36 -0800 | [diff] [blame] | 710 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 711 | "Processor driver received %s event\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 712 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
Glauber Costa | d6f882e | 2008-03-04 15:06:36 -0800 | [diff] [blame] | 713 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | |
| 715 | if (!is_processor_present(handle)) |
| 716 | break; |
| 717 | |
| 718 | if (acpi_bus_get_device(handle, &device)) { |
| 719 | result = acpi_processor_device_add(handle, &device); |
| 720 | if (result) |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 721 | printk(KERN_ERR PREFIX |
| 722 | "Unable to add the device\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | break; |
| 724 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 725 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | case ACPI_NOTIFY_EJECT_REQUEST: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 727 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 728 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | |
| 730 | if (acpi_bus_get_device(handle, &device)) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 731 | printk(KERN_ERR PREFIX |
| 732 | "Device don't exist, dropping EJECT\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | break; |
| 734 | } |
| 735 | pr = acpi_driver_data(device); |
| 736 | if (!pr) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 737 | printk(KERN_ERR PREFIX |
| 738 | "Driver data is NULL, dropping EJECT\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 739 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | break; |
| 742 | default: |
| 743 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 744 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | break; |
| 746 | } |
| 747 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 748 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | } |
| 750 | |
| 751 | static acpi_status |
| 752 | processor_walk_namespace_cb(acpi_handle handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 753 | u32 lvl, void *context, void **rv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 755 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | int *action = context; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 757 | acpi_object_type type = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | |
| 759 | status = acpi_get_type(handle, &type); |
| 760 | if (ACPI_FAILURE(status)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 761 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | |
| 763 | if (type != ACPI_TYPE_PROCESSOR) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 764 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 766 | switch (*action) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | case INSTALL_NOTIFY_HANDLER: |
| 768 | acpi_install_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 769 | ACPI_SYSTEM_NOTIFY, |
| 770 | acpi_processor_hotplug_notify, |
| 771 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | break; |
| 773 | case UNINSTALL_NOTIFY_HANDLER: |
| 774 | acpi_remove_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 775 | ACPI_SYSTEM_NOTIFY, |
| 776 | acpi_processor_hotplug_notify); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | break; |
| 778 | default: |
| 779 | break; |
| 780 | } |
| 781 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 782 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | } |
| 784 | |
Thomas Renninger | 3bd81a8 | 2012-01-17 22:40:07 +0100 | [diff] [blame] | 785 | static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | { |
Thomas Renninger | 3bd81a8 | 2012-01-17 22:40:07 +0100 | [diff] [blame] | 787 | acpi_handle handle = pr->handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | |
| 789 | if (!is_processor_present(handle)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 790 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | } |
| 792 | |
Thomas Renninger | 3bd81a8 | 2012-01-17 22:40:07 +0100 | [diff] [blame] | 793 | if (acpi_map_lsapic(handle, &pr->id)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 794 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | |
Thomas Renninger | 3bd81a8 | 2012-01-17 22:40:07 +0100 | [diff] [blame] | 796 | if (arch_register_cpu(pr->id)) { |
| 797 | acpi_unmap_lsapic(pr->id); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 798 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | } |
| 800 | |
Thomas Renninger | 99b7250 | 2012-01-19 18:18:43 +0100 | [diff] [blame] | 801 | /* CPU got hot-plugged, but cpu_data is not initialized yet |
| 802 | * Set flag to delay cpu_idle/throttling initialization |
| 803 | * in: |
| 804 | * acpi_processor_add() |
| 805 | * acpi_processor_get_info() |
| 806 | * and do it when the CPU gets online the first time |
| 807 | * TBD: Cleanup above functions and try to do this more elegant. |
| 808 | */ |
| 809 | printk(KERN_INFO "CPU %d got hotplugged\n", pr->id); |
| 810 | pr->flags.need_hotplug_init = 1; |
| 811 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 812 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | } |
| 814 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 815 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | { |
Zhang Rui | b62b8ef | 2008-04-29 02:35:56 -0400 | [diff] [blame] | 817 | if (cpu_online(pr->id)) |
| 818 | cpu_down(pr->id); |
| 819 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | arch_unregister_cpu(pr->id); |
| 821 | acpi_unmap_lsapic(pr->id); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 822 | return (0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | } |
| 824 | #else |
Thomas Renninger | 3bd81a8 | 2012-01-17 22:40:07 +0100 | [diff] [blame] | 825 | static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | { |
| 827 | return AE_ERROR; |
| 828 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 829 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 831 | return (-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | } |
| 833 | #endif |
| 834 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | static |
| 836 | void acpi_processor_install_hotplug_notify(void) |
| 837 | { |
| 838 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 839 | int action = INSTALL_NOTIFY_HANDLER; |
| 840 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 841 | ACPI_ROOT_OBJECT, |
| 842 | ACPI_UINT32_MAX, |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 843 | processor_walk_namespace_cb, NULL, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | #endif |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 845 | register_hotcpu_notifier(&acpi_cpu_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | } |
| 847 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | static |
| 849 | void acpi_processor_uninstall_hotplug_notify(void) |
| 850 | { |
| 851 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 852 | int action = UNINSTALL_NOTIFY_HANDLER; |
| 853 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 854 | ACPI_ROOT_OBJECT, |
| 855 | ACPI_UINT32_MAX, |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 856 | processor_walk_namespace_cb, NULL, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | #endif |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 858 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | } |
| 860 | |
| 861 | /* |
| 862 | * We keep the driver loaded even when ACPI is not running. |
| 863 | * This is needed for the powernow-k8 driver, that works even without |
| 864 | * ACPI, but needs symbols from this driver |
| 865 | */ |
| 866 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 867 | static int __init acpi_processor_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 869 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | |
Yinghai Lu | ce8442b | 2009-08-26 14:29:26 -0700 | [diff] [blame] | 871 | if (acpi_disabled) |
| 872 | return 0; |
| 873 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | memset(&errata, 0, sizeof(errata)); |
| 875 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | result = acpi_bus_register_driver(&acpi_processor_driver); |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 877 | if (result < 0) |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 878 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | |
| 880 | acpi_processor_install_hotplug_notify(); |
| 881 | |
| 882 | acpi_thermal_cpufreq_init(); |
| 883 | |
| 884 | acpi_processor_ppc_init(); |
| 885 | |
Zhao Yakui | 1180509 | 2008-01-28 13:53:42 +0800 | [diff] [blame] | 886 | acpi_processor_throttling_init(); |
| 887 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 888 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | } |
| 890 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 891 | static void __exit acpi_processor_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | { |
Yinghai Lu | ce8442b | 2009-08-26 14:29:26 -0700 | [diff] [blame] | 893 | if (acpi_disabled) |
| 894 | return; |
| 895 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | acpi_processor_ppc_exit(); |
| 897 | |
| 898 | acpi_thermal_cpufreq_exit(); |
| 899 | |
| 900 | acpi_processor_uninstall_hotplug_notify(); |
| 901 | |
| 902 | acpi_bus_unregister_driver(&acpi_processor_driver); |
| 903 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 904 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | } |
| 906 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | module_init(acpi_processor_init); |
| 908 | module_exit(acpi_processor_exit); |
| 909 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | MODULE_ALIAS("processor"); |