Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Robert Moore | 668 | 88.48% | 26 | 65.00% |
Erik Kaneda | 21 | 2.78% | 1 | 2.50% |
Linus Torvalds (pre-git) | 21 | 2.78% | 2 | 5.00% |
Andy Grover | 18 | 2.38% | 3 | 7.50% |
Lv Zheng | 17 | 2.25% | 2 | 5.00% |
Linus Torvalds | 4 | 0.53% | 2 | 5.00% |
Len Brown | 3 | 0.40% | 1 | 2.50% |
Erik Schmauss | 1 | 0.13% | 1 | 2.50% |
Patrick Mochel | 1 | 0.13% | 1 | 2.50% |
Masahiro Yamada | 1 | 0.13% | 1 | 2.50% |
Total | 755 | 40 |
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /****************************************************************************** * * Module Name: nspredef - Validation of ACPI predefined methods and objects * * Copyright (C) 2000 - 2023, Intel Corp. * *****************************************************************************/ #define ACPI_CREATE_PREDEFINED_TABLE #include <acpi/acpi.h> #include "accommon.h" #include "acnamesp.h" #include "acpredef.h" #define _COMPONENT ACPI_NAMESPACE ACPI_MODULE_NAME("nspredef") /******************************************************************************* * * This module validates predefined ACPI objects that appear in the namespace, * at the time they are evaluated (via acpi_evaluate_object). The purpose of this * validation is to detect problems with BIOS-exposed predefined ACPI objects * before the results are returned to the ACPI-related drivers. * * There are several areas that are validated: * * 1) The number of input arguments as defined by the method/object in the * ASL is validated against the ACPI specification. * 2) The type of the return object (if any) is validated against the ACPI * specification. * 3) For returned package objects, the count of package elements is * validated, as well as the type of each package element. Nested * packages are supported. * * For any problems found, a warning message is issued. * ******************************************************************************/ /* Local prototypes */ static acpi_status acpi_ns_check_reference(struct acpi_evaluate_info *info, union acpi_operand_object *return_object); static u32 acpi_ns_get_bitmapped_type(union acpi_operand_object *return_object); /******************************************************************************* * * FUNCTION: acpi_ns_check_return_value * * PARAMETERS: node - Namespace node for the method/object * info - Method execution information block * user_param_count - Number of parameters actually passed * return_status - Status from the object evaluation * return_object_ptr - Pointer to the object returned from the * evaluation of a method or object * * RETURN: Status * * DESCRIPTION: Check the value returned from a predefined name. * ******************************************************************************/ acpi_status acpi_ns_check_return_value(struct acpi_namespace_node *node, struct acpi_evaluate_info *info, u32 user_param_count, acpi_status return_status, union acpi_operand_object **return_object_ptr) { acpi_status status; const union acpi_predefined_info *predefined; ACPI_FUNCTION_TRACE(ns_check_return_value); /* If not a predefined name, we cannot validate the return object */ predefined = info->predefined; if (!predefined) { return_ACPI_STATUS(AE_OK); } /* * If the method failed or did not actually return an object, we cannot * validate the return object */ if ((return_status != AE_OK) && (return_status != AE_CTRL_RETURN_VALUE)) { return_ACPI_STATUS(AE_OK); } /* * Return value validation and possible repair. * * 1) Don't perform return value validation/repair if this feature * has been disabled via a global option. * * 2) We have a return value, but if one wasn't expected, just exit, * this is not a problem. For example, if the "Implicit Return" * feature is enabled, methods will always return a value. * * 3) If the return value can be of any type, then we cannot perform * any validation, just exit. */ if (acpi_gbl_disable_auto_repair || (!predefined->info.expected_btypes) || (predefined->info.expected_btypes == ACPI_RTYPE_ALL)) { return_ACPI_STATUS(AE_OK); } /* * Check that the type of the main return object is what is expected * for this predefined name */ status = acpi_ns_check_object_type(info, return_object_ptr, predefined->info.expected_btypes, ACPI_NOT_PACKAGE_ELEMENT); if (ACPI_FAILURE(status)) { goto exit; } /* * * 4) If there is no return value and it is optional, just return * AE_OK (_WAK). */ if (!(*return_object_ptr)) { goto exit; } /* * For returned Package objects, check the type of all sub-objects. * Note: Package may have been newly created by call above. */ if ((*return_object_ptr)->common.type == ACPI_TYPE_PACKAGE) { info->parent_package = *return_object_ptr; status = acpi_ns_check_package(info, return_object_ptr); if (ACPI_FAILURE(status)) { /* We might be able to fix some errors */ if ((status != AE_AML_OPERAND_TYPE) && (status != AE_AML_OPERAND_VALUE)) { goto exit; } } } /* * The return object was OK, or it was successfully repaired above. * Now make some additional checks such as verifying that package * objects are sorted correctly (if required) or buffer objects have * the correct data width (bytes vs. dwords). These repairs are * performed on a per-name basis, i.e., the code is specific to * particular predefined names. */ status = acpi_ns_complex_repairs(info, node, status, return_object_ptr); exit: /* * If the object validation failed or if we successfully repaired one * or more objects, mark the parent node to suppress further warning * messages during the next evaluation of the same method/object. */ if (ACPI_FAILURE(status) || (info->return_flags & ACPI_OBJECT_REPAIRED)) { node->flags |= ANOBJ_EVALUATED; } return_ACPI_STATUS(status); } /******************************************************************************* * * FUNCTION: acpi_ns_check_object_type * * PARAMETERS: info - Method execution information block * return_object_ptr - Pointer to the object returned from the * evaluation of a method or object * expected_btypes - Bitmap of expected return type(s) * package_index - Index of object within parent package (if * applicable - ACPI_NOT_PACKAGE_ELEMENT * otherwise) * * RETURN: Status * * DESCRIPTION: Check the type of the return object against the expected object * type(s). Use of Btype allows multiple expected object types. * ******************************************************************************/ acpi_status acpi_ns_check_object_type(struct acpi_evaluate_info *info, union acpi_operand_object **return_object_ptr, u32 expected_btypes, u32 package_index) { union acpi_operand_object *return_object = *return_object_ptr; acpi_status status = AE_OK; char type_buffer[96]; /* Room for 10 types */ /* A Namespace node should not get here, but make sure */ if (return_object && ACPI_GET_DESCRIPTOR_TYPE(return_object) == ACPI_DESC_TYPE_NAMED) { ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, info->node_flags, "Invalid return type - Found a Namespace node [%4.4s] type %s", return_object->node.name.ascii, acpi_ut_get_type_name(return_object->node. type))); return (AE_AML_OPERAND_TYPE); } /* * Convert the object type (ACPI_TYPE_xxx) to a bitmapped object type. * The bitmapped type allows multiple possible return types. * * Note, the cases below must handle all of the possible types returned * from all of the predefined names (including elements of returned * packages) */ info->return_btype = acpi_ns_get_bitmapped_type(return_object); if (info->return_btype == ACPI_RTYPE_ANY) { /* Not one of the supported objects, must be incorrect */ goto type_error_exit; } /* For reference objects, check that the reference type is correct */ if ((info->return_btype & expected_btypes) == ACPI_RTYPE_REFERENCE) { status = acpi_ns_check_reference(info, return_object); return (status); } /* Attempt simple repair of the returned object if necessary */ status = acpi_ns_simple_repair(info, expected_btypes, package_index, return_object_ptr); if (ACPI_SUCCESS(status)) { return (AE_OK); /* Successful repair */ } type_error_exit: /* Create a string with all expected types for this predefined object */ acpi_ut_get_expected_return_types(type_buffer, expected_btypes); if (!return_object) { ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, info->node_flags, "Expected return object of type %s", type_buffer)); } else if (package_index == ACPI_NOT_PACKAGE_ELEMENT) { ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, info->node_flags, "Return type mismatch - found %s, expected %s", acpi_ut_get_object_type_name (return_object), type_buffer)); } else { ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, info->node_flags, "Return Package type mismatch at index %u - " "found %s, expected %s", package_index, acpi_ut_get_object_type_name (return_object), type_buffer)); } return (AE_AML_OPERAND_TYPE); } /******************************************************************************* * * FUNCTION: acpi_ns_check_reference * * PARAMETERS: info - Method execution information block * return_object - Object returned from the evaluation of a * method or object * * RETURN: Status * * DESCRIPTION: Check a returned reference object for the correct reference * type. The only reference type that can be returned from a * predefined method is a named reference. All others are invalid. * ******************************************************************************/ static acpi_status acpi_ns_check_reference(struct acpi_evaluate_info *info, union acpi_operand_object *return_object) { /* * Check the reference object for the correct reference type (opcode). * The only type of reference that can be converted to a union acpi_object is * a reference to a named object (reference class: NAME) */ if (return_object->reference.class == ACPI_REFCLASS_NAME) { return (AE_OK); } ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, info->node_flags, "Return type mismatch - unexpected reference object type [%s] %2.2X", acpi_ut_get_reference_name(return_object), return_object->reference.class)); return (AE_AML_OPERAND_TYPE); } /******************************************************************************* * * FUNCTION: acpi_ns_get_bitmapped_type * * PARAMETERS: return_object - Object returned from method/obj evaluation * * RETURN: Object return type. ACPI_RTYPE_ANY indicates that the object * type is not supported. ACPI_RTYPE_NONE indicates that no * object was returned (return_object is NULL). * * DESCRIPTION: Convert object type into a bitmapped object return type. * ******************************************************************************/ static u32 acpi_ns_get_bitmapped_type(union acpi_operand_object *return_object) { u32 return_btype; if (!return_object) { return (ACPI_RTYPE_NONE); } /* Map acpi_object_type to internal bitmapped type */ switch (return_object->common.type) { case ACPI_TYPE_INTEGER: return_btype = ACPI_RTYPE_INTEGER; break; case ACPI_TYPE_BUFFER: return_btype = ACPI_RTYPE_BUFFER; break; case ACPI_TYPE_STRING: return_btype = ACPI_RTYPE_STRING; break; case ACPI_TYPE_PACKAGE: return_btype = ACPI_RTYPE_PACKAGE; break; case ACPI_TYPE_LOCAL_REFERENCE: return_btype = ACPI_RTYPE_REFERENCE; break; default: /* Not one of the supported objects, must be incorrect */ return_btype = ACPI_RTYPE_ANY; break; } return (return_btype); }
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