1 /****************************************************************************** 2 * 3 * Module Name: utosi - Support for the _OSI predefined control method 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2018, Intel Corp. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 */ 43 44 #include <acpi/acpi.h> 45 #include "accommon.h" 46 47 #define _COMPONENT ACPI_UTILITIES 48 ACPI_MODULE_NAME("utosi") 49 50 /****************************************************************************** 51 * 52 * ACPICA policy for new _OSI strings: 53 * 54 * It is the stated policy of ACPICA that new _OSI strings will be integrated 55 * into this module as soon as possible after they are defined. It is strongly 56 * recommended that all ACPICA hosts mirror this policy and integrate any 57 * changes to this module as soon as possible. There are several historical 58 * reasons behind this policy: 59 * 60 * 1) New BIOSs tend to test only the case where the host responds TRUE to 61 * the latest version of Windows, which would respond to the latest/newest 62 * _OSI string. Not responding TRUE to the latest version of Windows will 63 * risk executing untested code paths throughout the DSDT and SSDTs. 64 * 65 * 2) If a new _OSI string is recognized only after a significant delay, this 66 * has the potential to cause problems on existing working machines because 67 * of the possibility that a new and different path through the ASL code 68 * will be executed. 69 * 70 * 3) New _OSI strings are tending to come out about once per year. A delay 71 * in recognizing a new string for a significant amount of time risks the 72 * release of another string which only compounds the initial problem. 73 * 74 *****************************************************************************/ 75 /* 76 * Strings supported by the _OSI predefined control method (which is 77 * implemented internally within this module.) 78 * 79 * March 2009: Removed "Linux" as this host no longer wants to respond true 80 * for this string. Basically, the only safe OS strings are windows-related 81 * and in many or most cases represent the only test path within the 82 * BIOS-provided ASL code. 83 * 84 * The last element of each entry is used to track the newest version of 85 * Windows that the BIOS has requested. 86 */ 87 static struct acpi_interface_info acpi_default_supported_interfaces[] = { 88 /* Operating System Vendor Strings */ 89 90 {"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */ 91 {"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */ 92 {"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */ 93 {"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */ 94 {"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */ 95 {"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */ 96 {"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows vista - Added 03/2006 */ 97 {"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */ 98 {"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */ 99 {"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */ 100 {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */ 101 {"Windows 2012", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8 and Server 2012 - Added 08/2012 */ 102 {"Windows 2013", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8.1 and Server 2012 R2 - Added 01/2014 */ 103 {"Windows 2015", NULL, 0, ACPI_OSI_WIN_10}, /* Windows 10 - Added 03/2015 */ 104 {"Windows 2016", NULL, 0, ACPI_OSI_WIN_10_RS1}, /* Windows 10 version 1607 - Added 12/2017 */ 105 {"Windows 2017", NULL, 0, ACPI_OSI_WIN_10_RS2}, /* Windows 10 version 1703 - Added 12/2017 */ 106 107 /* Feature Group Strings */ 108 109 {"Extended Address Space Descriptor", NULL, ACPI_OSI_FEATURE, 0}, 110 111 /* 112 * All "optional" feature group strings (features that are implemented 113 * by the host) should be dynamically modified to VALID by the host via 114 * acpi_install_interface or acpi_update_interfaces. Such optional feature 115 * group strings are set as INVALID by default here. 116 */ 117 118 {"Module Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 119 {"Processor Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 120 {"3.0 Thermal Model", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 121 {"3.0 _SCP Extensions", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 122 {"Processor Aggregator Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0} 123 }; 124 125 /******************************************************************************* 126 * 127 * FUNCTION: acpi_ut_initialize_interfaces 128 * 129 * PARAMETERS: None 130 * 131 * RETURN: Status 132 * 133 * DESCRIPTION: Initialize the global _OSI supported interfaces list 134 * 135 ******************************************************************************/ 136 137 acpi_status acpi_ut_initialize_interfaces(void) 138 { 139 acpi_status status; 140 u32 i; 141 142 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 143 if (ACPI_FAILURE(status)) { 144 return (status); 145 } 146 147 acpi_gbl_supported_interfaces = acpi_default_supported_interfaces; 148 149 /* Link the static list of supported interfaces */ 150 151 for (i = 0; 152 i < (ACPI_ARRAY_LENGTH(acpi_default_supported_interfaces) - 1); 153 i++) { 154 acpi_default_supported_interfaces[i].next = 155 &acpi_default_supported_interfaces[(acpi_size)i + 1]; 156 } 157 158 acpi_os_release_mutex(acpi_gbl_osi_mutex); 159 return (AE_OK); 160 } 161 162 /******************************************************************************* 163 * 164 * FUNCTION: acpi_ut_interface_terminate 165 * 166 * PARAMETERS: None 167 * 168 * RETURN: Status 169 * 170 * DESCRIPTION: Delete all interfaces in the global list. Sets 171 * acpi_gbl_supported_interfaces to NULL. 172 * 173 ******************************************************************************/ 174 175 acpi_status acpi_ut_interface_terminate(void) 176 { 177 acpi_status status; 178 struct acpi_interface_info *next_interface; 179 180 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 181 if (ACPI_FAILURE(status)) { 182 return (status); 183 } 184 185 next_interface = acpi_gbl_supported_interfaces; 186 while (next_interface) { 187 acpi_gbl_supported_interfaces = next_interface->next; 188 189 if (next_interface->flags & ACPI_OSI_DYNAMIC) { 190 191 /* Only interfaces added at runtime can be freed */ 192 193 ACPI_FREE(next_interface->name); 194 ACPI_FREE(next_interface); 195 } else { 196 /* Interface is in static list. Reset it to invalid or valid. */ 197 198 if (next_interface->flags & ACPI_OSI_DEFAULT_INVALID) { 199 next_interface->flags |= ACPI_OSI_INVALID; 200 } else { 201 next_interface->flags &= ~ACPI_OSI_INVALID; 202 } 203 } 204 205 next_interface = acpi_gbl_supported_interfaces; 206 } 207 208 acpi_os_release_mutex(acpi_gbl_osi_mutex); 209 return (AE_OK); 210 } 211 212 /******************************************************************************* 213 * 214 * FUNCTION: acpi_ut_install_interface 215 * 216 * PARAMETERS: interface_name - The interface to install 217 * 218 * RETURN: Status 219 * 220 * DESCRIPTION: Install the interface into the global interface list. 221 * Caller MUST hold acpi_gbl_osi_mutex 222 * 223 ******************************************************************************/ 224 225 acpi_status acpi_ut_install_interface(acpi_string interface_name) 226 { 227 struct acpi_interface_info *interface_info; 228 229 /* Allocate info block and space for the name string */ 230 231 interface_info = 232 ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_interface_info)); 233 if (!interface_info) { 234 return (AE_NO_MEMORY); 235 } 236 237 interface_info->name = ACPI_ALLOCATE_ZEROED(strlen(interface_name) + 1); 238 if (!interface_info->name) { 239 ACPI_FREE(interface_info); 240 return (AE_NO_MEMORY); 241 } 242 243 /* Initialize new info and insert at the head of the global list */ 244 245 strcpy(interface_info->name, interface_name); 246 interface_info->flags = ACPI_OSI_DYNAMIC; 247 interface_info->next = acpi_gbl_supported_interfaces; 248 249 acpi_gbl_supported_interfaces = interface_info; 250 return (AE_OK); 251 } 252 253 /******************************************************************************* 254 * 255 * FUNCTION: acpi_ut_remove_interface 256 * 257 * PARAMETERS: interface_name - The interface to remove 258 * 259 * RETURN: Status 260 * 261 * DESCRIPTION: Remove the interface from the global interface list. 262 * Caller MUST hold acpi_gbl_osi_mutex 263 * 264 ******************************************************************************/ 265 266 acpi_status acpi_ut_remove_interface(acpi_string interface_name) 267 { 268 struct acpi_interface_info *previous_interface; 269 struct acpi_interface_info *next_interface; 270 271 previous_interface = next_interface = acpi_gbl_supported_interfaces; 272 while (next_interface) { 273 if (!strcmp(interface_name, next_interface->name)) { 274 /* 275 * Found: name is in either the static list 276 * or was added at runtime 277 */ 278 if (next_interface->flags & ACPI_OSI_DYNAMIC) { 279 280 /* Interface was added dynamically, remove and free it */ 281 282 if (previous_interface == next_interface) { 283 acpi_gbl_supported_interfaces = 284 next_interface->next; 285 } else { 286 previous_interface->next = 287 next_interface->next; 288 } 289 290 ACPI_FREE(next_interface->name); 291 ACPI_FREE(next_interface); 292 } else { 293 /* 294 * Interface is in static list. If marked invalid, then 295 * it does not actually exist. Else, mark it invalid. 296 */ 297 if (next_interface->flags & ACPI_OSI_INVALID) { 298 return (AE_NOT_EXIST); 299 } 300 301 next_interface->flags |= ACPI_OSI_INVALID; 302 } 303 304 return (AE_OK); 305 } 306 307 previous_interface = next_interface; 308 next_interface = next_interface->next; 309 } 310 311 /* Interface was not found */ 312 313 return (AE_NOT_EXIST); 314 } 315 316 /******************************************************************************* 317 * 318 * FUNCTION: acpi_ut_update_interfaces 319 * 320 * PARAMETERS: action - Actions to be performed during the 321 * update 322 * 323 * RETURN: Status 324 * 325 * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor 326 * strings or/and feature group strings. 327 * Caller MUST hold acpi_gbl_osi_mutex 328 * 329 ******************************************************************************/ 330 331 acpi_status acpi_ut_update_interfaces(u8 action) 332 { 333 struct acpi_interface_info *next_interface; 334 335 next_interface = acpi_gbl_supported_interfaces; 336 while (next_interface) { 337 if (((next_interface->flags & ACPI_OSI_FEATURE) && 338 (action & ACPI_FEATURE_STRINGS)) || 339 (!(next_interface->flags & ACPI_OSI_FEATURE) && 340 (action & ACPI_VENDOR_STRINGS))) { 341 if (action & ACPI_DISABLE_INTERFACES) { 342 343 /* Mark the interfaces as invalid */ 344 345 next_interface->flags |= ACPI_OSI_INVALID; 346 } else { 347 /* Mark the interfaces as valid */ 348 349 next_interface->flags &= ~ACPI_OSI_INVALID; 350 } 351 } 352 353 next_interface = next_interface->next; 354 } 355 356 return (AE_OK); 357 } 358 359 /******************************************************************************* 360 * 361 * FUNCTION: acpi_ut_get_interface 362 * 363 * PARAMETERS: interface_name - The interface to find 364 * 365 * RETURN: struct acpi_interface_info if found. NULL if not found. 366 * 367 * DESCRIPTION: Search for the specified interface name in the global list. 368 * Caller MUST hold acpi_gbl_osi_mutex 369 * 370 ******************************************************************************/ 371 372 struct acpi_interface_info *acpi_ut_get_interface(acpi_string interface_name) 373 { 374 struct acpi_interface_info *next_interface; 375 376 next_interface = acpi_gbl_supported_interfaces; 377 while (next_interface) { 378 if (!strcmp(interface_name, next_interface->name)) { 379 return (next_interface); 380 } 381 382 next_interface = next_interface->next; 383 } 384 385 return (NULL); 386 } 387 388 /******************************************************************************* 389 * 390 * FUNCTION: acpi_ut_osi_implementation 391 * 392 * PARAMETERS: walk_state - Current walk state 393 * 394 * RETURN: Status 395 * Integer: TRUE (0) if input string is matched 396 * FALSE (-1) if string is not matched 397 * 398 * DESCRIPTION: Implementation of the _OSI predefined control method. When 399 * an invocation of _OSI is encountered in the system AML, 400 * control is transferred to this function. 401 * 402 * (August 2016) 403 * Note: _OSI is now defined to return "Ones" to indicate a match, for 404 * compatibility with other ACPI implementations. On a 32-bit DSDT, Ones 405 * is 0xFFFFFFFF. On a 64-bit DSDT, Ones is 0xFFFFFFFFFFFFFFFF 406 * (ACPI_UINT64_MAX). 407 * 408 * This function always returns ACPI_UINT64_MAX for TRUE, and later code 409 * will truncate this to 32 bits if necessary. 410 * 411 ******************************************************************************/ 412 413 acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state) 414 { 415 union acpi_operand_object *string_desc; 416 union acpi_operand_object *return_desc; 417 struct acpi_interface_info *interface_info; 418 acpi_interface_handler interface_handler; 419 acpi_status status; 420 u64 return_value; 421 422 ACPI_FUNCTION_TRACE(ut_osi_implementation); 423 424 /* Validate the string input argument (from the AML caller) */ 425 426 string_desc = walk_state->arguments[0].object; 427 if (!string_desc || (string_desc->common.type != ACPI_TYPE_STRING)) { 428 return_ACPI_STATUS(AE_TYPE); 429 } 430 431 /* Create a return object */ 432 433 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); 434 if (!return_desc) { 435 return_ACPI_STATUS(AE_NO_MEMORY); 436 } 437 438 /* Default return value is 0, NOT SUPPORTED */ 439 440 return_value = 0; 441 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 442 if (ACPI_FAILURE(status)) { 443 acpi_ut_remove_reference(return_desc); 444 return_ACPI_STATUS(status); 445 } 446 447 /* Lookup the interface in the global _OSI list */ 448 449 interface_info = acpi_ut_get_interface(string_desc->string.pointer); 450 if (interface_info && !(interface_info->flags & ACPI_OSI_INVALID)) { 451 /* 452 * The interface is supported. 453 * Update the osi_data if necessary. We keep track of the latest 454 * version of Windows that has been requested by the BIOS. 455 */ 456 if (interface_info->value > acpi_gbl_osi_data) { 457 acpi_gbl_osi_data = interface_info->value; 458 } 459 460 return_value = ACPI_UINT64_MAX; 461 } 462 463 acpi_os_release_mutex(acpi_gbl_osi_mutex); 464 465 /* 466 * Invoke an optional _OSI interface handler. The host OS may wish 467 * to do some interface-specific handling. For example, warn about 468 * certain interfaces or override the true/false support value. 469 */ 470 interface_handler = acpi_gbl_interface_handler; 471 if (interface_handler) { 472 if (interface_handler 473 (string_desc->string.pointer, (u32)return_value)) { 474 return_value = ACPI_UINT64_MAX; 475 } 476 } 477 478 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, 479 "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", 480 string_desc->string.pointer, 481 return_value == 0 ? "not " : "")); 482 483 /* Complete the return object */ 484 485 return_desc->integer.value = return_value; 486 walk_state->return_desc = return_desc; 487 return_ACPI_STATUS(AE_OK); 488 } 489