462 lines · c
1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.02/******************************************************************************3 *4 * Module Name: utosi - Support for the _OSI predefined control method5 *6 * Copyright (C) 2000 - 2023, Intel Corp.7 *8 *****************************************************************************/9 10#include <acpi/acpi.h>11#include "accommon.h"12 13#define _COMPONENT ACPI_UTILITIES14ACPI_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 integrated21 * into this module as soon as possible after they are defined. It is strongly22 * recommended that all ACPICA hosts mirror this policy and integrate any23 * changes to this module as soon as possible. There are several historical24 * reasons behind this policy:25 *26 * 1) New BIOSs tend to test only the case where the host responds TRUE to27 * the latest version of Windows, which would respond to the latest/newest28 * _OSI string. Not responding TRUE to the latest version of Windows will29 * 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, this32 * has the potential to cause problems on existing working machines because33 * of the possibility that a new and different path through the ASL code34 * will be executed.35 *36 * 3) New _OSI strings are tending to come out about once per year. A delay37 * in recognizing a new string for a significant amount of time risks the38 * release of another string which only compounds the initial problem.39 *40 *****************************************************************************/41/*42 * Strings supported by the _OSI predefined control method (which is43 * implemented internally within this module.)44 *45 * March 2009: Removed "Linux" as this host no longer wants to respond true46 * for this string. Basically, the only safe OS strings are windows-related47 * and in many or most cases represent the only test path within the48 * BIOS-provided ASL code.49 *50 * The last element of each entry is used to track the newest version of51 * Windows that the BIOS has requested.52 */53static 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 {"Windows 2022", NULL, 0, ACPI_OSI_WIN_11_22H2}, /* Windows 11 version 22H2 - Added 04/2024 */79 80 /* Feature Group Strings */81 82 {"Extended Address Space Descriptor", NULL, ACPI_OSI_FEATURE, 0},83 84 /*85 * All "optional" feature group strings (features that are implemented86 * by the host) should be dynamically modified to VALID by the host via87 * acpi_install_interface or acpi_update_interfaces. Such optional feature88 * group strings are set as INVALID by default here.89 */90 91 {"Module Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0},92 {"Processor Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0},93 {"3.0 Thermal Model", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0},94 {"3.0 _SCP Extensions", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0},95 {"Processor Aggregator Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}96};97 98/*******************************************************************************99 *100 * FUNCTION: acpi_ut_initialize_interfaces101 *102 * PARAMETERS: None103 *104 * RETURN: Status105 *106 * DESCRIPTION: Initialize the global _OSI supported interfaces list107 *108 ******************************************************************************/109 110acpi_status acpi_ut_initialize_interfaces(void)111{112 acpi_status status;113 u32 i;114 115 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);116 if (ACPI_FAILURE(status)) {117 return (status);118 }119 120 acpi_gbl_supported_interfaces = acpi_default_supported_interfaces;121 122 /* Link the static list of supported interfaces */123 124 for (i = 0;125 i < (ACPI_ARRAY_LENGTH(acpi_default_supported_interfaces) - 1);126 i++) {127 acpi_default_supported_interfaces[i].next =128 &acpi_default_supported_interfaces[(acpi_size)i + 1];129 }130 131 acpi_os_release_mutex(acpi_gbl_osi_mutex);132 return (AE_OK);133}134 135/*******************************************************************************136 *137 * FUNCTION: acpi_ut_interface_terminate138 *139 * PARAMETERS: None140 *141 * RETURN: Status142 *143 * DESCRIPTION: Delete all interfaces in the global list. Sets144 * acpi_gbl_supported_interfaces to NULL.145 *146 ******************************************************************************/147 148acpi_status acpi_ut_interface_terminate(void)149{150 acpi_status status;151 struct acpi_interface_info *next_interface;152 153 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);154 if (ACPI_FAILURE(status)) {155 return (status);156 }157 158 next_interface = acpi_gbl_supported_interfaces;159 while (next_interface) {160 acpi_gbl_supported_interfaces = next_interface->next;161 162 if (next_interface->flags & ACPI_OSI_DYNAMIC) {163 164 /* Only interfaces added at runtime can be freed */165 166 ACPI_FREE(next_interface->name);167 ACPI_FREE(next_interface);168 } else {169 /* Interface is in static list. Reset it to invalid or valid. */170 171 if (next_interface->flags & ACPI_OSI_DEFAULT_INVALID) {172 next_interface->flags |= ACPI_OSI_INVALID;173 } else {174 next_interface->flags &= ~ACPI_OSI_INVALID;175 }176 }177 178 next_interface = acpi_gbl_supported_interfaces;179 }180 181 acpi_os_release_mutex(acpi_gbl_osi_mutex);182 return (AE_OK);183}184 185/*******************************************************************************186 *187 * FUNCTION: acpi_ut_install_interface188 *189 * PARAMETERS: interface_name - The interface to install190 *191 * RETURN: Status192 *193 * DESCRIPTION: Install the interface into the global interface list.194 * Caller MUST hold acpi_gbl_osi_mutex195 *196 ******************************************************************************/197 198acpi_status acpi_ut_install_interface(acpi_string interface_name)199{200 struct acpi_interface_info *interface_info;201 202 /* Allocate info block and space for the name string */203 204 interface_info =205 ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_interface_info));206 if (!interface_info) {207 return (AE_NO_MEMORY);208 }209 210 interface_info->name = ACPI_ALLOCATE_ZEROED(strlen(interface_name) + 1);211 if (!interface_info->name) {212 ACPI_FREE(interface_info);213 return (AE_NO_MEMORY);214 }215 216 /* Initialize new info and insert at the head of the global list */217 218 strcpy(interface_info->name, interface_name);219 interface_info->flags = ACPI_OSI_DYNAMIC;220 interface_info->next = acpi_gbl_supported_interfaces;221 222 acpi_gbl_supported_interfaces = interface_info;223 return (AE_OK);224}225 226/*******************************************************************************227 *228 * FUNCTION: acpi_ut_remove_interface229 *230 * PARAMETERS: interface_name - The interface to remove231 *232 * RETURN: Status233 *234 * DESCRIPTION: Remove the interface from the global interface list.235 * Caller MUST hold acpi_gbl_osi_mutex236 *237 ******************************************************************************/238 239acpi_status acpi_ut_remove_interface(acpi_string interface_name)240{241 struct acpi_interface_info *previous_interface;242 struct acpi_interface_info *next_interface;243 244 previous_interface = next_interface = acpi_gbl_supported_interfaces;245 while (next_interface) {246 if (!strcmp(interface_name, next_interface->name)) {247 /*248 * Found: name is in either the static list249 * or was added at runtime250 */251 if (next_interface->flags & ACPI_OSI_DYNAMIC) {252 253 /* Interface was added dynamically, remove and free it */254 255 if (previous_interface == next_interface) {256 acpi_gbl_supported_interfaces =257 next_interface->next;258 } else {259 previous_interface->next =260 next_interface->next;261 }262 263 ACPI_FREE(next_interface->name);264 ACPI_FREE(next_interface);265 } else {266 /*267 * Interface is in static list. If marked invalid, then268 * it does not actually exist. Else, mark it invalid.269 */270 if (next_interface->flags & ACPI_OSI_INVALID) {271 return (AE_NOT_EXIST);272 }273 274 next_interface->flags |= ACPI_OSI_INVALID;275 }276 277 return (AE_OK);278 }279 280 previous_interface = next_interface;281 next_interface = next_interface->next;282 }283 284 /* Interface was not found */285 286 return (AE_NOT_EXIST);287}288 289/*******************************************************************************290 *291 * FUNCTION: acpi_ut_update_interfaces292 *293 * PARAMETERS: action - Actions to be performed during the294 * update295 *296 * RETURN: Status297 *298 * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor299 * strings or/and feature group strings.300 * Caller MUST hold acpi_gbl_osi_mutex301 *302 ******************************************************************************/303 304acpi_status acpi_ut_update_interfaces(u8 action)305{306 struct acpi_interface_info *next_interface;307 308 next_interface = acpi_gbl_supported_interfaces;309 while (next_interface) {310 if (((next_interface->flags & ACPI_OSI_FEATURE) &&311 (action & ACPI_FEATURE_STRINGS)) ||312 (!(next_interface->flags & ACPI_OSI_FEATURE) &&313 (action & ACPI_VENDOR_STRINGS))) {314 if (action & ACPI_DISABLE_INTERFACES) {315 316 /* Mark the interfaces as invalid */317 318 next_interface->flags |= ACPI_OSI_INVALID;319 } else {320 /* Mark the interfaces as valid */321 322 next_interface->flags &= ~ACPI_OSI_INVALID;323 }324 }325 326 next_interface = next_interface->next;327 }328 329 return (AE_OK);330}331 332/*******************************************************************************333 *334 * FUNCTION: acpi_ut_get_interface335 *336 * PARAMETERS: interface_name - The interface to find337 *338 * RETURN: struct acpi_interface_info if found. NULL if not found.339 *340 * DESCRIPTION: Search for the specified interface name in the global list.341 * Caller MUST hold acpi_gbl_osi_mutex342 *343 ******************************************************************************/344 345struct acpi_interface_info *acpi_ut_get_interface(acpi_string interface_name)346{347 struct acpi_interface_info *next_interface;348 349 next_interface = acpi_gbl_supported_interfaces;350 while (next_interface) {351 if (!strcmp(interface_name, next_interface->name)) {352 return (next_interface);353 }354 355 next_interface = next_interface->next;356 }357 358 return (NULL);359}360 361/*******************************************************************************362 *363 * FUNCTION: acpi_ut_osi_implementation364 *365 * PARAMETERS: walk_state - Current walk state366 *367 * RETURN: Status368 * Integer: TRUE (0) if input string is matched369 * FALSE (-1) if string is not matched370 *371 * DESCRIPTION: Implementation of the _OSI predefined control method. When372 * an invocation of _OSI is encountered in the system AML,373 * control is transferred to this function.374 *375 * (August 2016)376 * Note: _OSI is now defined to return "Ones" to indicate a match, for377 * compatibility with other ACPI implementations. On a 32-bit DSDT, Ones378 * is 0xFFFFFFFF. On a 64-bit DSDT, Ones is 0xFFFFFFFFFFFFFFFF379 * (ACPI_UINT64_MAX).380 *381 * This function always returns ACPI_UINT64_MAX for TRUE, and later code382 * will truncate this to 32 bits if necessary.383 *384 ******************************************************************************/385 386acpi_status acpi_ut_osi_implementation(struct acpi_walk_state *walk_state)387{388 union acpi_operand_object *string_desc;389 union acpi_operand_object *return_desc;390 struct acpi_interface_info *interface_info;391 acpi_interface_handler interface_handler;392 acpi_status status;393 u64 return_value;394 395 ACPI_FUNCTION_TRACE(ut_osi_implementation);396 397 /* Validate the string input argument (from the AML caller) */398 399 string_desc = walk_state->arguments[0].object;400 if (!string_desc || (string_desc->common.type != ACPI_TYPE_STRING)) {401 return_ACPI_STATUS(AE_TYPE);402 }403 404 /* Create a return object */405 406 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);407 if (!return_desc) {408 return_ACPI_STATUS(AE_NO_MEMORY);409 }410 411 /* Default return value is 0, NOT SUPPORTED */412 413 return_value = 0;414 status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);415 if (ACPI_FAILURE(status)) {416 acpi_ut_remove_reference(return_desc);417 return_ACPI_STATUS(status);418 }419 420 /* Lookup the interface in the global _OSI list */421 422 interface_info = acpi_ut_get_interface(string_desc->string.pointer);423 if (interface_info && !(interface_info->flags & ACPI_OSI_INVALID)) {424 /*425 * The interface is supported.426 * Update the osi_data if necessary. We keep track of the latest427 * version of Windows that has been requested by the BIOS.428 */429 if (interface_info->value > acpi_gbl_osi_data) {430 acpi_gbl_osi_data = interface_info->value;431 }432 433 return_value = ACPI_UINT64_MAX;434 }435 436 acpi_os_release_mutex(acpi_gbl_osi_mutex);437 438 /*439 * Invoke an optional _OSI interface handler. The host OS may wish440 * to do some interface-specific handling. For example, warn about441 * certain interfaces or override the true/false support value.442 */443 interface_handler = acpi_gbl_interface_handler;444 if (interface_handler) {445 if (interface_handler446 (string_desc->string.pointer, (u32)return_value)) {447 return_value = ACPI_UINT64_MAX;448 }449 }450 451 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO,452 "ACPI: BIOS _OSI(\"%s\") is %ssupported\n",453 string_desc->string.pointer,454 return_value == 0 ? "not " : ""));455 456 /* Complete the return object */457 458 return_desc->integer.value = return_value;459 walk_state->return_desc = return_desc;460 return_ACPI_STATUS(AE_OK);461}462