Alex Chiang | 4781725 | 2009-12-20 12:19:34 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2005 Intel Corporation |
| 3 | * Copyright (C) 2009 Hewlett-Packard Development Company, L.P. |
| 4 | * |
| 5 | * Alex Chiang <achiang@hp.com> |
| 6 | * - Unified x86/ia64 implementations |
| 7 | * Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> |
| 8 | * - Added _PDC for platforms with Intel CPUs |
| 9 | */ |
Paul Gortmaker | 214f2c9 | 2011-10-26 16:22:14 -0400 | [diff] [blame] | 10 | #include <linux/export.h> |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 11 | #include <linux/dmi.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 12 | #include <linux/slab.h> |
Lv Zheng | 8b48463 | 2013-12-03 08:49:16 +0800 | [diff] [blame] | 13 | #include <linux/acpi.h> |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 14 | #include <acpi/processor.h> |
| 15 | |
| 16 | #include "internal.h" |
| 17 | |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 18 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
Alex Chiang | 4d5d4cd | 2010-02-22 12:11:14 -0700 | [diff] [blame] | 19 | ACPI_MODULE_NAME("processor_core"); |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 20 | |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 21 | static int map_lapic_id(struct acpi_subtable_header *entry, |
| 22 | u32 acpi_id, int *apic_id) |
| 23 | { |
| 24 | struct acpi_madt_local_apic *lapic = |
| 25 | (struct acpi_madt_local_apic *)entry; |
Alex Chiang | 1113073 | 2010-02-22 12:11:44 -0700 | [diff] [blame] | 26 | |
| 27 | if (!(lapic->lapic_flags & ACPI_MADT_ENABLED)) |
Hanjun Guo | 038d7b5 | 2014-01-17 12:37:02 +0800 | [diff] [blame] | 28 | return -ENODEV; |
Alex Chiang | 1113073 | 2010-02-22 12:11:44 -0700 | [diff] [blame] | 29 | |
| 30 | if (lapic->processor_id != acpi_id) |
Hanjun Guo | 038d7b5 | 2014-01-17 12:37:02 +0800 | [diff] [blame] | 31 | return -EINVAL; |
Alex Chiang | 1113073 | 2010-02-22 12:11:44 -0700 | [diff] [blame] | 32 | |
| 33 | *apic_id = lapic->id; |
Hanjun Guo | 038d7b5 | 2014-01-17 12:37:02 +0800 | [diff] [blame] | 34 | return 0; |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 35 | } |
| 36 | |
| 37 | static int map_x2apic_id(struct acpi_subtable_header *entry, |
| 38 | int device_declaration, u32 acpi_id, int *apic_id) |
| 39 | { |
| 40 | struct acpi_madt_local_x2apic *apic = |
| 41 | (struct acpi_madt_local_x2apic *)entry; |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 42 | |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 43 | if (!(apic->lapic_flags & ACPI_MADT_ENABLED)) |
Hanjun Guo | 038d7b5 | 2014-01-17 12:37:02 +0800 | [diff] [blame] | 44 | return -ENODEV; |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 45 | |
Alex Chiang | d674209 | 2010-02-22 12:11:50 -0700 | [diff] [blame] | 46 | if (device_declaration && (apic->uid == acpi_id)) { |
| 47 | *apic_id = apic->local_apic_id; |
Hanjun Guo | 038d7b5 | 2014-01-17 12:37:02 +0800 | [diff] [blame] | 48 | return 0; |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 49 | } |
| 50 | |
Hanjun Guo | 038d7b5 | 2014-01-17 12:37:02 +0800 | [diff] [blame] | 51 | return -EINVAL; |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 52 | } |
| 53 | |
| 54 | static int map_lsapic_id(struct acpi_subtable_header *entry, |
| 55 | int device_declaration, u32 acpi_id, int *apic_id) |
| 56 | { |
| 57 | struct acpi_madt_local_sapic *lsapic = |
| 58 | (struct acpi_madt_local_sapic *)entry; |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 59 | |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 60 | if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED)) |
Hanjun Guo | 038d7b5 | 2014-01-17 12:37:02 +0800 | [diff] [blame] | 61 | return -ENODEV; |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 62 | |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 63 | if (device_declaration) { |
Alex Chiang | eae701c | 2010-02-22 12:11:55 -0700 | [diff] [blame] | 64 | if ((entry->length < 16) || (lsapic->uid != acpi_id)) |
Hanjun Guo | 038d7b5 | 2014-01-17 12:37:02 +0800 | [diff] [blame] | 65 | return -EINVAL; |
Alex Chiang | eae701c | 2010-02-22 12:11:55 -0700 | [diff] [blame] | 66 | } else if (lsapic->processor_id != acpi_id) |
Hanjun Guo | 038d7b5 | 2014-01-17 12:37:02 +0800 | [diff] [blame] | 67 | return -EINVAL; |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 68 | |
Alex Chiang | eae701c | 2010-02-22 12:11:55 -0700 | [diff] [blame] | 69 | *apic_id = (lsapic->id << 8) | lsapic->eid; |
Hanjun Guo | 038d7b5 | 2014-01-17 12:37:02 +0800 | [diff] [blame] | 70 | return 0; |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | static int map_madt_entry(int type, u32 acpi_id) |
| 74 | { |
| 75 | unsigned long madt_end, entry; |
Alex Chiang | 149fe9c | 2010-02-22 12:12:00 -0700 | [diff] [blame] | 76 | static struct acpi_table_madt *madt; |
| 77 | static int read_madt; |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 78 | int apic_id = -1; |
| 79 | |
Alex Chiang | 149fe9c | 2010-02-22 12:12:00 -0700 | [diff] [blame] | 80 | if (!read_madt) { |
| 81 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, |
| 82 | (struct acpi_table_header **)&madt))) |
| 83 | madt = NULL; |
| 84 | read_madt++; |
| 85 | } |
| 86 | |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 87 | if (!madt) |
| 88 | return apic_id; |
| 89 | |
| 90 | entry = (unsigned long)madt; |
| 91 | madt_end = entry + madt->header.length; |
| 92 | |
| 93 | /* Parse all entries looking for a match. */ |
| 94 | |
| 95 | entry += sizeof(struct acpi_table_madt); |
| 96 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { |
| 97 | struct acpi_subtable_header *header = |
| 98 | (struct acpi_subtable_header *)entry; |
| 99 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { |
Hanjun Guo | 038d7b5 | 2014-01-17 12:37:02 +0800 | [diff] [blame] | 100 | if (!map_lapic_id(header, acpi_id, &apic_id)) |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 101 | break; |
| 102 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) { |
Hanjun Guo | 038d7b5 | 2014-01-17 12:37:02 +0800 | [diff] [blame] | 103 | if (!map_x2apic_id(header, type, acpi_id, &apic_id)) |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 104 | break; |
| 105 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { |
Hanjun Guo | 038d7b5 | 2014-01-17 12:37:02 +0800 | [diff] [blame] | 106 | if (!map_lsapic_id(header, type, acpi_id, &apic_id)) |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 107 | break; |
| 108 | } |
| 109 | entry += header->length; |
| 110 | } |
| 111 | return apic_id; |
| 112 | } |
| 113 | |
| 114 | static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id) |
| 115 | { |
| 116 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 117 | union acpi_object *obj; |
| 118 | struct acpi_subtable_header *header; |
| 119 | int apic_id = -1; |
| 120 | |
| 121 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) |
| 122 | goto exit; |
| 123 | |
| 124 | if (!buffer.length || !buffer.pointer) |
| 125 | goto exit; |
| 126 | |
| 127 | obj = buffer.pointer; |
| 128 | if (obj->type != ACPI_TYPE_BUFFER || |
| 129 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { |
| 130 | goto exit; |
| 131 | } |
| 132 | |
| 133 | header = (struct acpi_subtable_header *)obj->buffer.pointer; |
| 134 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { |
| 135 | map_lapic_id(header, acpi_id, &apic_id); |
| 136 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { |
| 137 | map_lsapic_id(header, type, acpi_id, &apic_id); |
| 138 | } |
| 139 | |
| 140 | exit: |
Syam Sidhardhan | 5273a25 | 2013-02-24 23:12:53 +0000 | [diff] [blame] | 141 | kfree(buffer.pointer); |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 142 | return apic_id; |
| 143 | } |
| 144 | |
Jiang Liu | ca9f62a | 2013-09-02 11:57:34 +0800 | [diff] [blame] | 145 | int acpi_get_apicid(acpi_handle handle, int type, u32 acpi_id) |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 146 | { |
Jiang Liu | ca9f62a | 2013-09-02 11:57:34 +0800 | [diff] [blame] | 147 | int apic_id; |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 148 | |
| 149 | apic_id = map_mat_entry(handle, type, acpi_id); |
| 150 | if (apic_id == -1) |
| 151 | apic_id = map_madt_entry(type, acpi_id); |
Jiang Liu | ca9f62a | 2013-09-02 11:57:34 +0800 | [diff] [blame] | 152 | |
| 153 | return apic_id; |
| 154 | } |
| 155 | |
| 156 | int acpi_map_cpuid(int apic_id, u32 acpi_id) |
| 157 | { |
| 158 | #ifdef CONFIG_SMP |
| 159 | int i; |
| 160 | #endif |
| 161 | |
Lin Ming | d640113 | 2011-12-13 09:36:03 +0800 | [diff] [blame] | 162 | if (apic_id == -1) { |
| 163 | /* |
| 164 | * On UP processor, there is no _MAT or MADT table. |
| 165 | * So above apic_id is always set to -1. |
| 166 | * |
| 167 | * BIOS may define multiple CPU handles even for UP processor. |
| 168 | * For example, |
| 169 | * |
| 170 | * Scope (_PR) |
| 171 | * { |
| 172 | * Processor (CPU0, 0x00, 0x00000410, 0x06) {} |
| 173 | * Processor (CPU1, 0x01, 0x00000410, 0x06) {} |
| 174 | * Processor (CPU2, 0x02, 0x00000410, 0x06) {} |
| 175 | * Processor (CPU3, 0x03, 0x00000410, 0x06) {} |
| 176 | * } |
| 177 | * |
Thomas Renninger | c4686c7 | 2012-07-12 12:24:33 +0200 | [diff] [blame] | 178 | * Ignores apic_id and always returns 0 for the processor |
| 179 | * handle with acpi id 0 if nr_cpu_ids is 1. |
| 180 | * This should be the case if SMP tables are not found. |
Lin Ming | d640113 | 2011-12-13 09:36:03 +0800 | [diff] [blame] | 181 | * Return -1 for other CPU's handle. |
| 182 | */ |
Thomas Renninger | c4686c7 | 2012-07-12 12:24:33 +0200 | [diff] [blame] | 183 | if (nr_cpu_ids <= 1 && acpi_id == 0) |
Lin Ming | d640113 | 2011-12-13 09:36:03 +0800 | [diff] [blame] | 184 | return acpi_id; |
| 185 | else |
| 186 | return apic_id; |
| 187 | } |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 188 | |
Lin Ming | 932df74 | 2011-05-16 09:11:00 +0800 | [diff] [blame] | 189 | #ifdef CONFIG_SMP |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 190 | for_each_possible_cpu(i) { |
| 191 | if (cpu_physical_id(i) == apic_id) |
| 192 | return i; |
| 193 | } |
Lin Ming | 932df74 | 2011-05-16 09:11:00 +0800 | [diff] [blame] | 194 | #else |
| 195 | /* In UP kernel, only processor 0 is valid */ |
| 196 | if (apic_id == 0) |
| 197 | return apic_id; |
| 198 | #endif |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 199 | return -1; |
| 200 | } |
Jiang Liu | ca9f62a | 2013-09-02 11:57:34 +0800 | [diff] [blame] | 201 | |
| 202 | int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id) |
| 203 | { |
| 204 | int apic_id; |
| 205 | |
| 206 | apic_id = acpi_get_apicid(handle, type, acpi_id); |
| 207 | |
| 208 | return acpi_map_cpuid(apic_id, acpi_id); |
| 209 | } |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 210 | EXPORT_SYMBOL_GPL(acpi_get_cpuid); |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 211 | |
Jan Beulich | 6430c9c | 2011-02-17 16:33:53 +0000 | [diff] [blame] | 212 | static bool __init processor_physically_present(acpi_handle handle) |
Alex Chiang | 5d554a7 | 2010-02-22 12:11:29 -0700 | [diff] [blame] | 213 | { |
| 214 | int cpuid, type; |
| 215 | u32 acpi_id; |
| 216 | acpi_status status; |
| 217 | acpi_object_type acpi_type; |
| 218 | unsigned long long tmp; |
| 219 | union acpi_object object = { 0 }; |
| 220 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; |
| 221 | |
| 222 | status = acpi_get_type(handle, &acpi_type); |
| 223 | if (ACPI_FAILURE(status)) |
| 224 | return false; |
| 225 | |
| 226 | switch (acpi_type) { |
| 227 | case ACPI_TYPE_PROCESSOR: |
| 228 | status = acpi_evaluate_object(handle, NULL, NULL, &buffer); |
| 229 | if (ACPI_FAILURE(status)) |
| 230 | return false; |
| 231 | acpi_id = object.processor.proc_id; |
| 232 | break; |
| 233 | case ACPI_TYPE_DEVICE: |
| 234 | status = acpi_evaluate_integer(handle, "_UID", NULL, &tmp); |
| 235 | if (ACPI_FAILURE(status)) |
| 236 | return false; |
| 237 | acpi_id = tmp; |
| 238 | break; |
| 239 | default: |
| 240 | return false; |
| 241 | } |
| 242 | |
| 243 | type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0; |
| 244 | cpuid = acpi_get_cpuid(handle, type, acpi_id); |
| 245 | |
Lin Ming | 932df74 | 2011-05-16 09:11:00 +0800 | [diff] [blame] | 246 | if (cpuid == -1) |
Alex Chiang | 5d554a7 | 2010-02-22 12:11:29 -0700 | [diff] [blame] | 247 | return false; |
| 248 | |
| 249 | return true; |
| 250 | } |
Alex Chiang | 78ed8bd | 2010-02-22 12:11:24 -0700 | [diff] [blame] | 251 | |
Paul Gortmaker | fe7bf10 | 2013-06-19 14:30:58 -0400 | [diff] [blame] | 252 | static void acpi_set_pdc_bits(u32 *buf) |
Alex Chiang | 08ea48a | 2009-12-20 12:19:24 -0700 | [diff] [blame] | 253 | { |
| 254 | buf[0] = ACPI_PDC_REVISION_ID; |
| 255 | buf[1] = 1; |
| 256 | |
| 257 | /* Enable coordination with firmware's _TSD info */ |
| 258 | buf[2] = ACPI_PDC_SMP_T_SWCOORD; |
Alex Chiang | 6c5807d | 2009-12-20 12:19:29 -0700 | [diff] [blame] | 259 | |
| 260 | /* Twiddle arch-specific bits needed for _PDC */ |
| 261 | arch_acpi_set_pdc_bits(buf); |
Alex Chiang | 08ea48a | 2009-12-20 12:19:24 -0700 | [diff] [blame] | 262 | } |
| 263 | |
Paul Gortmaker | fe7bf10 | 2013-06-19 14:30:58 -0400 | [diff] [blame] | 264 | static struct acpi_object_list *acpi_processor_alloc_pdc(void) |
Alex Chiang | 407cd87 | 2009-12-20 12:19:19 -0700 | [diff] [blame] | 265 | { |
| 266 | struct acpi_object_list *obj_list; |
| 267 | union acpi_object *obj; |
| 268 | u32 *buf; |
| 269 | |
Alex Chiang | 407cd87 | 2009-12-20 12:19:19 -0700 | [diff] [blame] | 270 | /* allocate and initialize pdc. It will be used later. */ |
| 271 | obj_list = kmalloc(sizeof(struct acpi_object_list), GFP_KERNEL); |
| 272 | if (!obj_list) { |
| 273 | printk(KERN_ERR "Memory allocation error\n"); |
Alex Chiang | 3b407ae | 2009-12-20 12:19:39 -0700 | [diff] [blame] | 274 | return NULL; |
Alex Chiang | 407cd87 | 2009-12-20 12:19:19 -0700 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL); |
| 278 | if (!obj) { |
| 279 | printk(KERN_ERR "Memory allocation error\n"); |
| 280 | kfree(obj_list); |
Alex Chiang | 3b407ae | 2009-12-20 12:19:39 -0700 | [diff] [blame] | 281 | return NULL; |
Alex Chiang | 407cd87 | 2009-12-20 12:19:19 -0700 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | buf = kmalloc(12, GFP_KERNEL); |
| 285 | if (!buf) { |
| 286 | printk(KERN_ERR "Memory allocation error\n"); |
| 287 | kfree(obj); |
| 288 | kfree(obj_list); |
Alex Chiang | 3b407ae | 2009-12-20 12:19:39 -0700 | [diff] [blame] | 289 | return NULL; |
Alex Chiang | 407cd87 | 2009-12-20 12:19:19 -0700 | [diff] [blame] | 290 | } |
| 291 | |
Alex Chiang | 08ea48a | 2009-12-20 12:19:24 -0700 | [diff] [blame] | 292 | acpi_set_pdc_bits(buf); |
| 293 | |
Alex Chiang | 407cd87 | 2009-12-20 12:19:19 -0700 | [diff] [blame] | 294 | obj->type = ACPI_TYPE_BUFFER; |
| 295 | obj->buffer.length = 12; |
| 296 | obj->buffer.pointer = (u8 *) buf; |
| 297 | obj_list->count = 1; |
| 298 | obj_list->pointer = obj; |
Alex Chiang | 407cd87 | 2009-12-20 12:19:19 -0700 | [diff] [blame] | 299 | |
Alex Chiang | 3b407ae | 2009-12-20 12:19:39 -0700 | [diff] [blame] | 300 | return obj_list; |
Alex Chiang | 407cd87 | 2009-12-20 12:19:19 -0700 | [diff] [blame] | 301 | } |
| 302 | |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 303 | /* |
| 304 | * _PDC is required for a BIOS-OS handshake for most of the newer |
| 305 | * ACPI processor features. |
| 306 | */ |
Hanjun Guo | 1606484 | 2014-02-08 20:46:26 +0800 | [diff] [blame] | 307 | static acpi_status |
Alex Chiang | fa11856 | 2009-12-20 12:19:45 -0700 | [diff] [blame] | 308 | acpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in) |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 309 | { |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 310 | acpi_status status = AE_OK; |
| 311 | |
Thomas Renninger | d189604 | 2010-11-03 17:06:14 +0100 | [diff] [blame] | 312 | if (boot_option_idle_override == IDLE_NOMWAIT) { |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 313 | /* |
| 314 | * If mwait is disabled for CPU C-states, the C2C3_FFH access |
| 315 | * mode will be disabled in the parameter of _PDC object. |
| 316 | * Of course C1_FFH access mode will also be disabled. |
| 317 | */ |
| 318 | union acpi_object *obj; |
| 319 | u32 *buffer = NULL; |
| 320 | |
| 321 | obj = pdc_in->pointer; |
| 322 | buffer = (u32 *)(obj->buffer.pointer); |
| 323 | buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH); |
| 324 | |
| 325 | } |
Alex Chiang | fa11856 | 2009-12-20 12:19:45 -0700 | [diff] [blame] | 326 | status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL); |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 327 | |
| 328 | if (ACPI_FAILURE(status)) |
| 329 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 330 | "Could not evaluate _PDC, using legacy perf. control.\n")); |
| 331 | |
| 332 | return status; |
| 333 | } |
| 334 | |
Paul Gortmaker | fe7bf10 | 2013-06-19 14:30:58 -0400 | [diff] [blame] | 335 | void acpi_processor_set_pdc(acpi_handle handle) |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 336 | { |
Alex Chiang | 3b407ae | 2009-12-20 12:19:39 -0700 | [diff] [blame] | 337 | struct acpi_object_list *obj_list; |
| 338 | |
Alex Chiang | 1d9cb47 | 2009-12-20 12:19:14 -0700 | [diff] [blame] | 339 | if (arch_has_acpi_pdc() == false) |
| 340 | return; |
| 341 | |
Alex Chiang | 3b407ae | 2009-12-20 12:19:39 -0700 | [diff] [blame] | 342 | obj_list = acpi_processor_alloc_pdc(); |
| 343 | if (!obj_list) |
| 344 | return; |
| 345 | |
Alex Chiang | 43bab25 | 2009-12-20 12:23:16 -0700 | [diff] [blame] | 346 | acpi_processor_eval_pdc(handle, obj_list); |
Alex Chiang | b9c2db7 | 2009-12-20 12:23:11 -0700 | [diff] [blame] | 347 | |
| 348 | kfree(obj_list->pointer->buffer.pointer); |
| 349 | kfree(obj_list->pointer); |
| 350 | kfree(obj_list); |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 351 | } |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 352 | |
Jan Beulich | 6430c9c | 2011-02-17 16:33:53 +0000 | [diff] [blame] | 353 | static acpi_status __init |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 354 | early_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv) |
| 355 | { |
Alex Chiang | 5d554a7 | 2010-02-22 12:11:29 -0700 | [diff] [blame] | 356 | if (processor_physically_present(handle) == false) |
| 357 | return AE_OK; |
| 358 | |
Alex Chiang | 43bab25 | 2009-12-20 12:23:16 -0700 | [diff] [blame] | 359 | acpi_processor_set_pdc(handle); |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 360 | return AE_OK; |
| 361 | } |
| 362 | |
Hanjun Guo | 2c4fa00 | 2014-02-19 00:23:54 +0800 | [diff] [blame] | 363 | #if defined(CONFIG_X86) || defined(CONFIG_IA64) |
| 364 | static int __init set_no_mwait(const struct dmi_system_id *id) |
| 365 | { |
| 366 | pr_notice(PREFIX "%s detected - disabling mwait for CPU C-states\n", |
| 367 | id->ident); |
| 368 | boot_option_idle_override = IDLE_NOMWAIT; |
| 369 | return 0; |
| 370 | } |
| 371 | |
| 372 | static struct dmi_system_id processor_idle_dmi_table[] __initdata = { |
| 373 | { |
| 374 | set_no_mwait, "Extensa 5220", { |
| 375 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), |
| 376 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), |
| 377 | DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), |
| 378 | DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL}, |
| 379 | {}, |
| 380 | }; |
| 381 | |
| 382 | static void __init processor_dmi_check(void) |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 383 | { |
| 384 | /* |
| 385 | * Check whether the system is DMI table. If yes, OSPM |
| 386 | * should not use mwait for CPU-states. |
| 387 | */ |
| 388 | dmi_check_system(processor_idle_dmi_table); |
Hanjun Guo | 2c4fa00 | 2014-02-19 00:23:54 +0800 | [diff] [blame] | 389 | } |
| 390 | #else |
| 391 | static inline void processor_dmi_check(void) {} |
| 392 | #endif |
| 393 | |
| 394 | void __init acpi_early_processor_set_pdc(void) |
| 395 | { |
| 396 | processor_dmi_check(); |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 397 | |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 398 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT, |
| 399 | ACPI_UINT32_MAX, |
| 400 | early_init_pdc, NULL, NULL, NULL); |
Hanjun Guo | 5205692 | 2014-02-09 17:12:27 +0800 | [diff] [blame] | 401 | acpi_get_devices(ACPI_PROCESSOR_DEVICE_HID, early_init_pdc, NULL, NULL); |
Alex Chiang | 78f1699 | 2009-12-20 12:19:09 -0700 | [diff] [blame] | 402 | } |