1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 2 /****************************************************************************** 3 * 4 * Module Name: utosi - Support for the _OSI predefined control method 5 * 6 * Copyright (C) 2000 - 2022, Intel Corp. 7 * 8 *****************************************************************************/ 9 10 #include <acpi/acpi.h> 11 #include "accommon.h" 12 13 #define _COMPONENT ACPI_UTILITIES 14 ACPI_MODULE_NAME("utosi") 15 16 /****************************************************************************** 17 * 18 * ACPICA policy for new _OSI strings: 19 * 20 * It is the stated policy of ACPICA that new _OSI strings will be integrated 21 * into this module as soon as possible after they are defined. It is strongly 22 * recommended that all ACPICA hosts mirror this policy and integrate any 23 * changes to this module as soon as possible. There are several historical 24 * reasons behind this policy: 25 * 26 * 1) New BIOSs tend to test only the case where the host responds TRUE to 27 * the latest version of Windows, which would respond to the latest/newest 28 * _OSI string. Not responding TRUE to the latest version of Windows will 29 * risk executing untested code paths throughout the DSDT and SSDTs. 30 * 31 * 2) If a new _OSI string is recognized only after a significant delay, this 32 * has the potential to cause problems on existing working machines because 33 * of the possibility that a new and different path through the ASL code 34 * will be executed. 35 * 36 * 3) New _OSI strings are tending to come out about once per year. A delay 37 * in recognizing a new string for a significant amount of time risks the 38 * release of another string which only compounds the initial problem. 39 * 40 *****************************************************************************/ 41 /* 42 * Strings supported by the _OSI predefined control method (which is 43 * implemented internally within this module.) 44 * 45 * March 2009: Removed "Linux" as this host no longer wants to respond true 46 * for this string. Basically, the only safe OS strings are windows-related 47 * and in many or most cases represent the only test path within the 48 * BIOS-provided ASL code. 49 * 50 * The last element of each entry is used to track the newest version of 51 * Windows that the BIOS has requested. 52 */ 53 static struct acpi_interface_info acpi_default_supported_interfaces[] = { 54 /* Operating System Vendor Strings */ 55 56 {"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */ 57 {"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */ 58 {"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */ 59 {"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */ 60 {"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */ 61 {"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */ 62 {"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows vista - Added 03/2006 */ 63 {"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */ 64 {"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */ 65 {"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */ 66 {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */ 67 {"Windows 2012", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8 and Server 2012 - Added 08/2012 */ 68 {"Windows 2013", NULL, 0, ACPI_OSI_WIN_8_1}, /* Windows 8.1 and Server 2012 R2 - Added 01/2014 */ 69 {"Windows 2015", NULL, 0, ACPI_OSI_WIN_10}, /* Windows 10 - Added 03/2015 */ 70 {"Windows 2016", NULL, 0, ACPI_OSI_WIN_10_RS1}, /* Windows 10 version 1607 - Added 12/2017 */ 71 {"Windows 2017", NULL, 0, ACPI_OSI_WIN_10_RS2}, /* Windows 10 version 1703 - Added 12/2017 */ 72 {"Windows 2017.2", NULL, 0, ACPI_OSI_WIN_10_RS3}, /* Windows 10 version 1709 - Added 02/2018 */ 73 {"Windows 2018", NULL, 0, ACPI_OSI_WIN_10_RS4}, /* Windows 10 version 1803 - Added 11/2018 */ 74 {"Windows 2018.2", NULL, 0, ACPI_OSI_WIN_10_RS5}, /* Windows 10 version 1809 - Added 11/2018 */ 75 {"Windows 2019", NULL, 0, ACPI_OSI_WIN_10_19H1}, /* Windows 10 version 1903 - Added 08/2019 */ 76 {"Windows 2020", NULL, 0, ACPI_OSI_WIN_10_20H1}, /* Windows 10 version 2004 - Added 08/2021 */ 77 {"Windows 2021", NULL, 0, ACPI_OSI_WIN_11}, /* Windows 11 - Added 01/2022 */ 78 79 /* Feature Group Strings */ 80 81 {"Extended Address Space Descriptor", NULL, ACPI_OSI_FEATURE, 0}, 82 83 /* 84 * All "optional" feature group strings (features that are implemented 85 * by the host) should be dynamically modified to VALID by the host via 86 * acpi_install_interface or acpi_update_interfaces. Such optional feature 87 * group strings are set as INVALID by default here. 88 */ 89 90 {"Module Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 91 {"Processor Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 92 {"3.0 Thermal Model", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 93 {"3.0 _SCP Extensions", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}, 94 {"Processor Aggregator Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0} 95 }; 96 97 /******************************************************************************* 98 * 99 * FUNCTION: acpi_ut_initialize_interfaces 100 * 101 * PARAMETERS: None 102 * 103 * RETURN: Status 104 * 105 * DESCRIPTION: Initialize the global _OSI supported interfaces list 106 * 107 ******************************************************************************/ 108 109 acpi_status acpi_ut_initialize_interfaces(void) 110 { 111 acpi_status status; 112 u32 i; 113 114 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 115 if (ACPI_FAILURE(status)) { 116 return (status); 117 } 118 119 acpi_gbl_supported_interfaces = acpi_default_supported_interfaces; 120 121 /* Link the static list of supported interfaces */ 122 123 for (i = 0; 124 i < (ACPI_ARRAY_LENGTH(acpi_default_supported_interfaces) - 1); 125 i++) { 126 acpi_default_supported_interfaces[i].next = 127 &acpi_default_supported_interfaces[(acpi_size)i + 1]; 128 } 129 130 acpi_os_release_mutex(acpi_gbl_osi_mutex); 131 return (AE_OK); 132 } 133 134 /******************************************************************************* 135 * 136 * FUNCTION: acpi_ut_interface_terminate 137 * 138 * PARAMETERS: None 139 * 140 * RETURN: Status 141 * 142 * DESCRIPTION: Delete all interfaces in the global list. Sets 143 * acpi_gbl_supported_interfaces to NULL. 144 * 145 ******************************************************************************/ 146 147 acpi_status acpi_ut_interface_terminate(void) 148 { 149 acpi_status status; 150 struct acpi_interface_info *next_interface; 151 152 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 153 if (ACPI_FAILURE(status)) { 154 return (status); 155 } 156 157 next_interface = acpi_gbl_supported_interfaces; 158 while (next_interface) { 159 acpi_gbl_supported_interfaces = next_interface->next; 160 161 if (next_interface->flags & ACPI_OSI_DYNAMIC) { 162 163 /* Only interfaces added at runtime can be freed */ 164 165 ACPI_FREE(next_interface->name); 166 ACPI_FREE(next_interface); 167 } else { 168 /* Interface is in static list. Reset it to invalid or valid. */ 169 170 if (next_interface->flags & ACPI_OSI_DEFAULT_INVALID) { 171 next_interface->flags |= ACPI_OSI_INVALID; 172 } else { 173 next_interface->flags &= ~ACPI_OSI_INVALID; 174 } 175 } 176 177 next_interface = acpi_gbl_supported_interfaces; 178 } 179 180 acpi_os_release_mutex(acpi_gbl_osi_mutex); 181 return (AE_OK); 182 } 183 184 /******************************************************************************* 185 * 186 * FUNCTION: acpi_ut_install_interface 187 * 188 * PARAMETERS: interface_name - The interface to install 189 * 190 * RETURN: Status 191 * 192 * DESCRIPTION: Install the interface into the global interface list. 193 * Caller MUST hold acpi_gbl_osi_mutex 194 * 195 ******************************************************************************/ 196 197 acpi_status acpi_ut_install_interface(acpi_string interface_name) 198 { 199 struct acpi_interface_info *interface_info; 200 201 /* Allocate info block and space for the name string */ 202 203 interface_info = 204 ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_interface_info)); 205 if (!interface_info) { 206 return (AE_NO_MEMORY); 207 } 208 209 interface_info->name = ACPI_ALLOCATE_ZEROED(strlen(interface_name) + 1); 210 if (!interface_info->name) { 211 ACPI_FREE(interface_info); 212 return (AE_NO_MEMORY); 213 } 214 215 /* Initialize new info and insert at the head of the global list */ 216 217 strcpy(interface_info->name, interface_name); 218 interface_info->flags = ACPI_OSI_DYNAMIC; 219 interface_info->next = acpi_gbl_supported_interfaces; 220 221 acpi_gbl_supported_interfaces = interface_info; 222 return (AE_OK); 223 } 224 225 /******************************************************************************* 226 * 227 * FUNCTION: acpi_ut_remove_interface 228 * 229 * PARAMETERS: interface_name - The interface to remove 230 * 231 * RETURN: Status 232 * 233 * DESCRIPTION: Remove the interface from the global interface list. 234 * Caller MUST hold acpi_gbl_osi_mutex 235 * 236 ******************************************************************************/ 237 238 acpi_status acpi_ut_remove_interface(acpi_string interface_name) 239 { 240 struct acpi_interface_info *previous_interface; 241 struct acpi_interface_info *next_interface; 242 243 previous_interface = next_interface = acpi_gbl_supported_interfaces; 244 while (next_interface) { 245 if (!strcmp(interface_name, next_interface->name)) { 246 /* 247 * Found: name is in either the static list 248 * or was added at runtime 249 */ 250 if (next_interface->flags & ACPI_OSI_DYNAMIC) { 251 252 /* Interface was added dynamically, remove and free it */ 253 254 if (previous_interface == next_interface) { 255 acpi_gbl_supported_interfaces = 256 next_interface->next; 257 } else { 258 previous_interface->next = 259 next_interface->next; 260 } 261 262 ACPI_FREE(next_interface->name); 263 ACPI_FREE(next_interface); 264 } else { 265 /* 266 * Interface is in static list. If marked invalid, then 267 * it does not actually exist. Else, mark it invalid. 268 */ 269 if (next_interface->flags & ACPI_OSI_INVALID) { 270 return (AE_NOT_EXIST); 271 } 272 273 next_interface->flags |= ACPI_OSI_INVALID; 274 } 275 276 return (AE_OK); 277 } 278 279 previous_interface = next_interface; 280 next_interface = next_interface->next; 281 } 282 283 /* Interface was not found */ 284 285 return (AE_NOT_EXIST); 286 } 287 288 /******************************************************************************* 289 * 290 * FUNCTION: acpi_ut_update_interfaces 291 * 292 * PARAMETERS: action - Actions to be performed during the 293 * update 294 * 295 * RETURN: Status 296 * 297 * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor 298 * strings or/and feature group strings. 299 * Caller MUST hold acpi_gbl_osi_mutex 300 * 301 ******************************************************************************/ 302 303 acpi_status acpi_ut_update_interfaces(u8 action) 304 { 305 struct acpi_interface_info *next_interface; 306 307 next_interface = acpi_gbl_supported_interfaces; 308 while (next_interface) { 309 if (((next_interface->flags & ACPI_OSI_FEATURE) && 310 (action & ACPI_FEATURE_STRINGS)) || 311 (!(next_interface->flags & ACPI_OSI_FEATURE) && 312 (action & ACPI_VENDOR_STRINGS))) { 313 if (action & ACPI_DISABLE_INTERFACES) { 314 315 /* Mark the interfaces as invalid */ 316 317 next_interface->flags |= ACPI_OSI_INVALID; 318 } else { 319 /* Mark the interfaces as valid */ 320 321 next_interface->flags &= ~ACPI_OSI_INVALID; 322 } 323 } 324 325 next_interface = next_interface->next; 326 } 327 328 return (AE_OK); 329 } 330 331 /******************************************************************************* 332 * 333 * FUNCTION: acpi_ut_get_interface 334 * 335 * PARAMETERS: interface_name - The interface to find 336 * 337 * RETURN: struct acpi_interface_info if found. NULL if not found. 338 * 339 * DESCRIPTION: Search for the specified interface name in the global list. 340 * Caller MUST hold acpi_gbl_osi_mutex 341 * 342 ******************************************************************************/ 343 344 struct acpi_interface_info *acpi_ut_get_interface(acpi_string interface_name) 345 { 346 struct acpi_interface_info *next_interface; 347 348 next_interface = acpi_gbl_supported_interfaces; 349 while (next_interface) { 350 if (!strcmp(interface_name, next_interface->name)) { 351 return (next_interface); 352 } 353 354 next_interface = next_interface->next; 355 } 356 357 return (NULL); 358 } 359 360 /******************************************************************************* 361 * 362 * FUNCTION: acpi_ut_osi_implementation 363 * 364 * PARAMETERS: walk_state - Current walk state 365 * 366 * RETURN: Status 367 * Integer: TRUE (0) if input string is matched 368 * FALSE (-1) if string is not matched 369 * 370 * DESCRIPTION: Implementation of the _OSI predefined control method. When 371 * an invocation of _OSI is encountered in the system AML, 372 * control is transferred to this function. 373 * 374 * (August 2016) 375 * Note: _OSI is now defined to return "Ones" to indicate a match, for 376 * compatibility with other ACPI implementations. On a 32-bit DSDT, Ones 377 * is 0xFFFFFFFF. On a 64-bit DSDT, Ones is 0xFFFFFFFFFFFFFFFF 378 * (ACPI_UINT64_MAX). 379 * 380 * This function always returns ACPI_UINT64_MAX for TRUE, and later code 381 * will truncate this to 32 bits if necessary. 382 * 383 ******************************************************************************/ 384 385 acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state) 386 { 387 union acpi_operand_object *string_desc; 388 union acpi_operand_object *return_desc; 389 struct acpi_interface_info *interface_info; 390 acpi_interface_handler interface_handler; 391 acpi_status status; 392 u64 return_value; 393 394 ACPI_FUNCTION_TRACE(ut_osi_implementation); 395 396 /* Validate the string input argument (from the AML caller) */ 397 398 string_desc = walk_state->arguments[0].object; 399 if (!string_desc || (string_desc->common.type != ACPI_TYPE_STRING)) { 400 return_ACPI_STATUS(AE_TYPE); 401 } 402 403 /* Create a return object */ 404 405 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); 406 if (!return_desc) { 407 return_ACPI_STATUS(AE_NO_MEMORY); 408 } 409 410 /* Default return value is 0, NOT SUPPORTED */ 411 412 return_value = 0; 413 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER); 414 if (ACPI_FAILURE(status)) { 415 acpi_ut_remove_reference(return_desc); 416 return_ACPI_STATUS(status); 417 } 418 419 /* Lookup the interface in the global _OSI list */ 420 421 interface_info = acpi_ut_get_interface(string_desc->string.pointer); 422 if (interface_info && !(interface_info->flags & ACPI_OSI_INVALID)) { 423 /* 424 * The interface is supported. 425 * Update the osi_data if necessary. We keep track of the latest 426 * version of Windows that has been requested by the BIOS. 427 */ 428 if (interface_info->value > acpi_gbl_osi_data) { 429 acpi_gbl_osi_data = interface_info->value; 430 } 431 432 return_value = ACPI_UINT64_MAX; 433 } 434 435 acpi_os_release_mutex(acpi_gbl_osi_mutex); 436 437 /* 438 * Invoke an optional _OSI interface handler. The host OS may wish 439 * to do some interface-specific handling. For example, warn about 440 * certain interfaces or override the true/false support value. 441 */ 442 interface_handler = acpi_gbl_interface_handler; 443 if (interface_handler) { 444 if (interface_handler 445 (string_desc->string.pointer, (u32)return_value)) { 446 return_value = ACPI_UINT64_MAX; 447 } 448 } 449 450 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, 451 "ACPI: BIOS _OSI(\"%s\") is %ssupported\n", 452 string_desc->string.pointer, 453 return_value == 0 ? "not " : "")); 454 455 /* Complete the return object */ 456 457 return_desc->integer.value = return_value; 458 walk_state->return_desc = return_desc; 459 return_ACPI_STATUS(AE_OK); 460 } 461