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.h" 45 #include "accommon.h" 46 47 48 #define _COMPONENT ACPI_UTILITIES 49 ACPI_MODULE_NAME ("utosi") 50 51 52 /****************************************************************************** 53 * 54 * ACPICA policy for new _OSI strings: 55 * 56 * It is the stated policy of ACPICA that new _OSI strings will be integrated 57 * into this module as soon as possible after they are defined. It is strongly 58 * recommended that all ACPICA hosts mirror this policy and integrate any 59 * changes to this module as soon as possible. There are several historical 60 * reasons behind this policy: 61 * 62 * 1) New BIOSs tend to test only the case where the host responds TRUE to 63 * the latest version of Windows, which would respond to the latest/newest 64 * _OSI string. Not responding TRUE to the latest version of Windows will 65 * risk executing untested code paths throughout the DSDT and SSDTs. 66 * 67 * 2) If a new _OSI string is recognized only after a significant delay, this 68 * has the potential to cause problems on existing working machines because 69 * of the possibility that a new and different path through the ASL code 70 * will be executed. 71 * 72 * 3) New _OSI strings are tending to come out about once per year. A delay 73 * in recognizing a new string for a significant amount of time risks the 74 * release of another string which only compounds the initial problem. 75 * 76 *****************************************************************************/ 77 78 79 /* 80 * Strings supported by the _OSI predefined control method (which is 81 * implemented internally within this module.) 82 * 83 * March 2009: Removed "Linux" as this host no longer wants to respond true 84 * for this string. Basically, the only safe OS strings are windows-related 85 * and in many or most cases represent the only test path within the 86 * BIOS-provided ASL code. 87 * 88 * The last element of each entry is used to track the newest version of 89 * Windows that the BIOS has requested. 90 */ 91 static ACPI_INTERFACE_INFO AcpiDefaultSupportedInterfaces[] = 92 { 93 /* Operating System Vendor Strings */ 94 95 {"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */ 96 {"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */ 97 {"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */ 98 {"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */ 99 {"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */ 100 {"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */ 101 {"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows Vista - Added 03/2006 */ 102 {"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */ 103 {"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */ 104 {"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */ 105 {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */ 106 {"Windows 2012", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8 and Server 2012 - Added 08/2012 */ 107 {"Windows 2013", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8.1 and Server 2012 R2 - Added 01/2014 */ 108 {"Windows 2015", NULL, 0, ACPI_OSI_WIN_10}, /* Windows 10 - Added 03/2015 */ 109 {"Windows 2016", NULL, 0, ACPI_OSI_WIN_10_RS1}, /* Windows 10 version 1607 - Added 12/2017 */ 110 {"Windows 2017", NULL, 0, ACPI_OSI_WIN_10_RS2}, /* Windows 10 version 1703 - Added 12/2017 */ 111 {"Windows 2017.2", NULL, 0, ACPI_OSI_WIN_10_RS3}, /* Windows 10 version 1709 - Added 02/2018 */ 112 113 /* Feature Group Strings */ 114 115 {"Extended Address Space Descriptor", NULL, ACPI_OSI_FEATURE, 0}, 116 117 /* 118 * All "optional" feature group strings (features that are implemented 119 * by the host) should be dynamically modified to VALID by the host via 120 * AcpiInstallInterface or AcpiUpdateInterfaces. Such optional feature 121 * group strings are set as INVALID by default here. 122 */ 123 124 {"Module Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 125 {"Processor Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 126 {"3.0 Thermal Model", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 127 {"3.0 _SCP Extensions", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 128 {"Processor Aggregator Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0} 129 }; 130 131 132 /******************************************************************************* 133 * 134 * FUNCTION: AcpiUtInitializeInterfaces 135 * 136 * PARAMETERS: None 137 * 138 * RETURN: Status 139 * 140 * DESCRIPTION: Initialize the global _OSI supported interfaces list 141 * 142 ******************************************************************************/ 143 144 ACPI_STATUS 145 AcpiUtInitializeInterfaces ( 146 void) 147 { 148 ACPI_STATUS Status; 149 UINT32 i; 150 151 152 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 153 if (ACPI_FAILURE (Status)) 154 { 155 return (Status); 156 } 157 158 AcpiGbl_SupportedInterfaces = AcpiDefaultSupportedInterfaces; 159 160 /* Link the static list of supported interfaces */ 161 162 for (i = 0; 163 i < (ACPI_ARRAY_LENGTH (AcpiDefaultSupportedInterfaces) - 1); 164 i++) 165 { 166 AcpiDefaultSupportedInterfaces[i].Next = 167 &AcpiDefaultSupportedInterfaces[(ACPI_SIZE) i + 1]; 168 } 169 170 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 171 return (AE_OK); 172 } 173 174 175 /******************************************************************************* 176 * 177 * FUNCTION: AcpiUtInterfaceTerminate 178 * 179 * PARAMETERS: None 180 * 181 * RETURN: Status 182 * 183 * DESCRIPTION: Delete all interfaces in the global list. Sets 184 * AcpiGbl_SupportedInterfaces to NULL. 185 * 186 ******************************************************************************/ 187 188 ACPI_STATUS 189 AcpiUtInterfaceTerminate ( 190 void) 191 { 192 ACPI_STATUS Status; 193 ACPI_INTERFACE_INFO *NextInterface; 194 195 196 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 197 if (ACPI_FAILURE (Status)) 198 { 199 return (Status); 200 } 201 202 NextInterface = AcpiGbl_SupportedInterfaces; 203 while (NextInterface) 204 { 205 AcpiGbl_SupportedInterfaces = NextInterface->Next; 206 207 if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 208 { 209 /* Only interfaces added at runtime can be freed */ 210 211 ACPI_FREE (__UNCONST(NextInterface->Name)); 212 ACPI_FREE (NextInterface); 213 } 214 else 215 { 216 /* Interface is in static list. Reset it to invalid or valid. */ 217 218 if (NextInterface->Flags & ACPI_OSI_DEFAULT_INVALID) 219 { 220 NextInterface->Flags |= ACPI_OSI_INVALID; 221 } 222 else 223 { 224 NextInterface->Flags &= ~ACPI_OSI_INVALID; 225 } 226 } 227 228 NextInterface = AcpiGbl_SupportedInterfaces; 229 } 230 231 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 232 return (AE_OK); 233 } 234 235 236 /******************************************************************************* 237 * 238 * FUNCTION: AcpiUtInstallInterface 239 * 240 * PARAMETERS: InterfaceName - The interface to install 241 * 242 * RETURN: Status 243 * 244 * DESCRIPTION: Install the interface into the global interface list. 245 * Caller MUST hold AcpiGbl_OsiMutex 246 * 247 ******************************************************************************/ 248 249 ACPI_STATUS 250 AcpiUtInstallInterface ( 251 ACPI_STRING InterfaceName) 252 { 253 ACPI_INTERFACE_INFO *InterfaceInfo; 254 255 256 /* Allocate info block and space for the name string */ 257 258 InterfaceInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_INTERFACE_INFO)); 259 if (!InterfaceInfo) 260 { 261 return (AE_NO_MEMORY); 262 } 263 264 InterfaceInfo->Name = ACPI_ALLOCATE_ZEROED (strlen (InterfaceName) + 1); 265 if (!InterfaceInfo->Name) 266 { 267 ACPI_FREE (InterfaceInfo); 268 return (AE_NO_MEMORY); 269 } 270 271 /* Initialize new info and insert at the head of the global list */ 272 273 strcpy (__UNCONST(InterfaceInfo->Name), InterfaceName); 274 InterfaceInfo->Flags = ACPI_OSI_DYNAMIC; 275 InterfaceInfo->Next = AcpiGbl_SupportedInterfaces; 276 277 AcpiGbl_SupportedInterfaces = InterfaceInfo; 278 return (AE_OK); 279 } 280 281 282 /******************************************************************************* 283 * 284 * FUNCTION: AcpiUtRemoveInterface 285 * 286 * PARAMETERS: InterfaceName - The interface to remove 287 * 288 * RETURN: Status 289 * 290 * DESCRIPTION: Remove the interface from the global interface list. 291 * Caller MUST hold AcpiGbl_OsiMutex 292 * 293 ******************************************************************************/ 294 295 ACPI_STATUS 296 AcpiUtRemoveInterface ( 297 ACPI_STRING InterfaceName) 298 { 299 ACPI_INTERFACE_INFO *PreviousInterface; 300 ACPI_INTERFACE_INFO *NextInterface; 301 302 303 PreviousInterface = NextInterface = AcpiGbl_SupportedInterfaces; 304 while (NextInterface) 305 { 306 if (!strcmp (InterfaceName, NextInterface->Name)) 307 { 308 /* 309 * Found: name is in either the static list 310 * or was added at runtime 311 */ 312 if (NextInterface->Flags & ACPI_OSI_DYNAMIC) 313 { 314 /* Interface was added dynamically, remove and free it */ 315 316 if (PreviousInterface == NextInterface) 317 { 318 AcpiGbl_SupportedInterfaces = NextInterface->Next; 319 } 320 else 321 { 322 PreviousInterface->Next = NextInterface->Next; 323 } 324 325 ACPI_FREE (__UNCONST(NextInterface->Name)); 326 ACPI_FREE (NextInterface); 327 } 328 else 329 { 330 /* 331 * Interface is in static list. If marked invalid, then 332 * it does not actually exist. Else, mark it invalid. 333 */ 334 if (NextInterface->Flags & ACPI_OSI_INVALID) 335 { 336 return (AE_NOT_EXIST); 337 } 338 339 NextInterface->Flags |= ACPI_OSI_INVALID; 340 } 341 342 return (AE_OK); 343 } 344 345 PreviousInterface = NextInterface; 346 NextInterface = NextInterface->Next; 347 } 348 349 /* Interface was not found */ 350 351 return (AE_NOT_EXIST); 352 } 353 354 355 /******************************************************************************* 356 * 357 * FUNCTION: AcpiUtUpdateInterfaces 358 * 359 * PARAMETERS: Action - Actions to be performed during the 360 * update 361 * 362 * RETURN: Status 363 * 364 * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor 365 * strings or/and feature group strings. 366 * Caller MUST hold AcpiGbl_OsiMutex 367 * 368 ******************************************************************************/ 369 370 ACPI_STATUS 371 AcpiUtUpdateInterfaces ( 372 UINT8 Action) 373 { 374 ACPI_INTERFACE_INFO *NextInterface; 375 376 377 NextInterface = AcpiGbl_SupportedInterfaces; 378 while (NextInterface) 379 { 380 if (((NextInterface->Flags & ACPI_OSI_FEATURE) && 381 (Action & ACPI_FEATURE_STRINGS)) || 382 (!(NextInterface->Flags & ACPI_OSI_FEATURE) && 383 (Action & ACPI_VENDOR_STRINGS))) 384 { 385 if (Action & ACPI_DISABLE_INTERFACES) 386 { 387 /* Mark the interfaces as invalid */ 388 389 NextInterface->Flags |= ACPI_OSI_INVALID; 390 } 391 else 392 { 393 /* Mark the interfaces as valid */ 394 395 NextInterface->Flags &= ~ACPI_OSI_INVALID; 396 } 397 } 398 399 NextInterface = NextInterface->Next; 400 } 401 402 return (AE_OK); 403 } 404 405 406 /******************************************************************************* 407 * 408 * FUNCTION: AcpiUtGetInterface 409 * 410 * PARAMETERS: InterfaceName - The interface to find 411 * 412 * RETURN: ACPI_INTERFACE_INFO if found. NULL if not found. 413 * 414 * DESCRIPTION: Search for the specified interface name in the global list. 415 * Caller MUST hold AcpiGbl_OsiMutex 416 * 417 ******************************************************************************/ 418 419 ACPI_INTERFACE_INFO * 420 AcpiUtGetInterface ( 421 ACPI_STRING InterfaceName) 422 { 423 ACPI_INTERFACE_INFO *NextInterface; 424 425 426 NextInterface = AcpiGbl_SupportedInterfaces; 427 while (NextInterface) 428 { 429 if (!strcmp (InterfaceName, NextInterface->Name)) 430 { 431 return (NextInterface); 432 } 433 434 NextInterface = NextInterface->Next; 435 } 436 437 return (NULL); 438 } 439 440 441 /******************************************************************************* 442 * 443 * FUNCTION: AcpiUtOsiImplementation 444 * 445 * PARAMETERS: WalkState - Current walk state 446 * 447 * RETURN: Status 448 * Integer: TRUE (0) if input string is matched 449 * FALSE (-1) if string is not matched 450 * 451 * DESCRIPTION: Implementation of the _OSI predefined control method. When 452 * an invocation of _OSI is encountered in the system AML, 453 * control is transferred to this function. 454 * 455 * (August 2016) 456 * Note: _OSI is now defined to return "Ones" to indicate a match, for 457 * compatibility with other ACPI implementations. On a 32-bit DSDT, Ones 458 * is 0xFFFFFFFF. On a 64-bit DSDT, Ones is 0xFFFFFFFFFFFFFFFF 459 * (ACPI_UINT64_MAX). 460 * 461 * This function always returns ACPI_UINT64_MAX for TRUE, and later code 462 * will truncate this to 32 bits if necessary. 463 * 464 ******************************************************************************/ 465 466 ACPI_STATUS 467 AcpiUtOsiImplementation ( 468 ACPI_WALK_STATE *WalkState) 469 { 470 ACPI_OPERAND_OBJECT *StringDesc; 471 ACPI_OPERAND_OBJECT *ReturnDesc; 472 ACPI_INTERFACE_INFO *InterfaceInfo; 473 ACPI_INTERFACE_HANDLER InterfaceHandler; 474 ACPI_STATUS Status; 475 UINT64 ReturnValue; 476 477 478 ACPI_FUNCTION_TRACE (UtOsiImplementation); 479 480 481 /* Validate the string input argument (from the AML caller) */ 482 483 StringDesc = WalkState->Arguments[0].Object; 484 if (!StringDesc || 485 (StringDesc->Common.Type != ACPI_TYPE_STRING)) 486 { 487 return_ACPI_STATUS (AE_TYPE); 488 } 489 490 /* Create a return object */ 491 492 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 493 if (!ReturnDesc) 494 { 495 return_ACPI_STATUS (AE_NO_MEMORY); 496 } 497 498 /* Default return value is 0, NOT SUPPORTED */ 499 500 ReturnValue = 0; 501 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 502 if (ACPI_FAILURE (Status)) 503 { 504 AcpiUtRemoveReference (ReturnDesc); 505 return_ACPI_STATUS (Status); 506 } 507 508 /* Lookup the interface in the global _OSI list */ 509 510 InterfaceInfo = AcpiUtGetInterface (StringDesc->String.Pointer); 511 if (InterfaceInfo && 512 !(InterfaceInfo->Flags & ACPI_OSI_INVALID)) 513 { 514 /* 515 * The interface is supported. 516 * Update the OsiData if necessary. We keep track of the latest 517 * version of Windows that has been requested by the BIOS. 518 */ 519 if (InterfaceInfo->Value > AcpiGbl_OsiData) 520 { 521 AcpiGbl_OsiData = InterfaceInfo->Value; 522 } 523 524 ReturnValue = ACPI_UINT64_MAX; 525 } 526 527 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 528 529 /* 530 * Invoke an optional _OSI interface handler. The host OS may wish 531 * to do some interface-specific handling. For example, warn about 532 * certain interfaces or override the true/false support value. 533 */ 534 InterfaceHandler = AcpiGbl_InterfaceHandler; 535 if (InterfaceHandler) 536 { 537 if (InterfaceHandler ( 538 StringDesc->String.Pointer, (UINT32) ReturnValue)) 539 { 540 ReturnValue = ACPI_UINT64_MAX; 541 } 542 } 543 544 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, 545 "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", 546 StringDesc->String.Pointer, ReturnValue == 0 ? "not " : "")); 547 548 /* Complete the return object */ 549 550 ReturnDesc->Integer.Value = ReturnValue; 551 WalkState->ReturnDesc = ReturnDesc; 552 return_ACPI_STATUS (AE_OK); 553 } 554