1 #include "bios_config.hpp"
2 
3 #include "bios_enum_attribute.hpp"
4 #include "bios_integer_attribute.hpp"
5 #include "bios_string_attribute.hpp"
6 #include "bios_table.hpp"
7 #include "common/bios_utils.hpp"
8 
9 #include <phosphor-logging/lg2.hpp>
10 #include <xyz/openbmc_project/BIOSConfig/Manager/server.hpp>
11 
12 #include <filesystem>
13 #include <fstream>
14 
15 #ifdef OEM_IBM
16 #include "oem/ibm/libpldmresponder/platform_oem_ibm.hpp"
17 #endif
18 
19 PHOSPHOR_LOG2_USING;
20 
21 using namespace pldm::utils;
22 
23 namespace pldm
24 {
25 namespace responder
26 {
27 namespace bios
28 {
29 namespace
30 {
31 using BIOSConfigManager =
32     sdbusplus::xyz::openbmc_project::BIOSConfig::server::Manager;
33 
34 constexpr auto attributesJsonFile = "bios_attrs.json";
35 
36 constexpr auto stringTableFile = "stringTable";
37 constexpr auto attrTableFile = "attributeTable";
38 constexpr auto attrValueTableFile = "attributeValueTable";
39 
40 } // namespace
41 
42 BIOSConfig::BIOSConfig(
43     const char* jsonDir, const char* tableDir, DBusHandler* const dbusHandler,
44     int /* fd */, uint8_t eid, pldm::InstanceIdDb* instanceIdDb,
45     pldm::requester::Handler<pldm::requester::Request>* handler,
46     pldm::responder::platform_config::Handler* platformConfigHandler,
47     pldm::responder::bios::Callback requestPLDMServiceName) :
48     jsonDir(jsonDir), tableDir(tableDir), dbusHandler(dbusHandler), eid(eid),
49     instanceIdDb(instanceIdDb), handler(handler),
50     platformConfigHandler(platformConfigHandler),
51     requestPLDMServiceName(requestPLDMServiceName)
52 {
53     fs::create_directories(tableDir);
54     removeTables();
55 
56 #ifdef SYSTEM_SPECIFIC_BIOS_JSON
57     checkSystemTypeAvailability();
58 #else
59     initBIOSAttributes(sysType, false);
60 #endif
61 
62     listenPendingAttributes();
63 }
64 
65 void BIOSConfig::checkSystemTypeAvailability()
66 {
67     if (platformConfigHandler)
68     {
69         auto systemType = platformConfigHandler->getPlatformName();
70         if (systemType.has_value())
71         {
72             // Received System Type from Entity Manager
73             sysType = systemType.value();
74             initBIOSAttributes(sysType, true);
75         }
76         else
77         {
78             platformConfigHandler->registerSystemTypeCallback(
79                 std::bind(&BIOSConfig::initBIOSAttributes, this,
80                           std::placeholders::_1, std::placeholders::_2));
81         }
82     }
83 }
84 
85 void BIOSConfig::initBIOSAttributes(const std::string& systemType,
86                                     bool registerService)
87 {
88     sysType = systemType;
89     fs::path dir{jsonDir / sysType};
90     if (!fs::exists(dir))
91     {
92         error("System specific bios attribute directory {DIR} does not exit",
93               "DIR", dir);
94         if (registerService)
95         {
96             requestPLDMServiceName();
97         }
98         return;
99     }
100     constructAttributes();
101     buildTables();
102     if (registerService)
103     {
104         requestPLDMServiceName();
105     }
106 }
107 
108 void BIOSConfig::buildTables()
109 {
110     auto stringTable = buildAndStoreStringTable();
111     if (stringTable)
112     {
113         buildAndStoreAttrTables(*stringTable);
114     }
115 }
116 
117 std::optional<Table> BIOSConfig::getBIOSTable(pldm_bios_table_types tableType)
118 {
119     fs::path tablePath;
120     switch (tableType)
121     {
122         case PLDM_BIOS_STRING_TABLE:
123             tablePath = tableDir / stringTableFile;
124             break;
125         case PLDM_BIOS_ATTR_TABLE:
126             tablePath = tableDir / attrTableFile;
127             break;
128         case PLDM_BIOS_ATTR_VAL_TABLE:
129             tablePath = tableDir / attrValueTableFile;
130             break;
131     }
132     return loadTable(tablePath);
133 }
134 
135 int BIOSConfig::setBIOSTable(uint8_t tableType, const Table& table,
136                              bool updateBaseBIOSTable)
137 {
138     fs::path stringTablePath(tableDir / stringTableFile);
139     fs::path attrTablePath(tableDir / attrTableFile);
140     fs::path attrValueTablePath(tableDir / attrValueTableFile);
141 
142     if (!pldm_bios_table_checksum(table.data(), table.size()))
143     {
144         return PLDM_INVALID_BIOS_TABLE_DATA_INTEGRITY_CHECK;
145     }
146 
147     if (tableType == PLDM_BIOS_STRING_TABLE)
148     {
149         storeTable(stringTablePath, table);
150     }
151     else if (tableType == PLDM_BIOS_ATTR_TABLE)
152     {
153         BIOSTable biosStringTable(stringTablePath.c_str());
154         if (biosStringTable.isEmpty())
155         {
156             return PLDM_INVALID_BIOS_TABLE_TYPE;
157         }
158 
159         auto rc = checkAttributeTable(table);
160         if (rc != PLDM_SUCCESS)
161         {
162             return rc;
163         }
164 
165         storeTable(attrTablePath, table);
166     }
167     else if (tableType == PLDM_BIOS_ATTR_VAL_TABLE)
168     {
169         BIOSTable biosStringTable(stringTablePath.c_str());
170         BIOSTable biosStringValueTable(attrTablePath.c_str());
171         if (biosStringTable.isEmpty() || biosStringValueTable.isEmpty())
172         {
173             return PLDM_INVALID_BIOS_TABLE_TYPE;
174         }
175 
176         auto rc = checkAttributeValueTable(table);
177         if (rc != PLDM_SUCCESS)
178         {
179             return rc;
180         }
181 
182         storeTable(attrValueTablePath, table);
183     }
184     else
185     {
186         return PLDM_INVALID_BIOS_TABLE_TYPE;
187     }
188 
189     if ((tableType == PLDM_BIOS_ATTR_VAL_TABLE) && updateBaseBIOSTable)
190     {
191         updateBaseBIOSTableProperty();
192     }
193 
194     return PLDM_SUCCESS;
195 }
196 
197 int BIOSConfig::checkAttributeTable(const Table& table)
198 {
199     using namespace pldm::bios::utils;
200     auto stringTable = getBIOSTable(PLDM_BIOS_STRING_TABLE);
201     for (auto entry :
202          BIOSTableIter<PLDM_BIOS_ATTR_TABLE>(table.data(), table.size()))
203     {
204         auto attrNameHandle =
205             pldm_bios_table_attr_entry_decode_string_handle(entry);
206 
207         auto stringEnty = pldm_bios_table_string_find_by_handle(
208             stringTable->data(), stringTable->size(), attrNameHandle);
209         if (stringEnty == nullptr)
210         {
211             return PLDM_INVALID_BIOS_ATTR_HANDLE;
212         }
213 
214         auto attrType = static_cast<pldm_bios_attribute_type>(
215             pldm_bios_table_attr_entry_decode_attribute_type(entry));
216 
217         switch (attrType)
218         {
219             case PLDM_BIOS_ENUMERATION:
220             case PLDM_BIOS_ENUMERATION_READ_ONLY:
221             {
222                 uint8_t pvNum;
223                 // Preconditions are upheld therefore no error check necessary
224                 pldm_bios_table_attr_entry_enum_decode_pv_num(entry, &pvNum);
225                 std::vector<uint16_t> pvHandls(pvNum);
226                 // Preconditions are upheld therefore no error check necessary
227                 pldm_bios_table_attr_entry_enum_decode_pv_hdls(
228                     entry, pvHandls.data(), pvHandls.size());
229                 uint8_t defNum;
230                 pldm_bios_table_attr_entry_enum_decode_def_num(entry, &defNum);
231                 std::vector<uint8_t> defIndices(defNum);
232                 pldm_bios_table_attr_entry_enum_decode_def_indices(
233                     entry, defIndices.data(), defIndices.size());
234 
235                 for (size_t i = 0; i < pvHandls.size(); i++)
236                 {
237                     auto stringEntry = pldm_bios_table_string_find_by_handle(
238                         stringTable->data(), stringTable->size(), pvHandls[i]);
239                     if (stringEntry == nullptr)
240                     {
241                         return PLDM_INVALID_BIOS_ATTR_HANDLE;
242                     }
243                 }
244 
245                 for (size_t i = 0; i < defIndices.size(); i++)
246                 {
247                     auto stringEntry = pldm_bios_table_string_find_by_handle(
248                         stringTable->data(), stringTable->size(),
249                         pvHandls[defIndices[i]]);
250                     if (stringEntry == nullptr)
251                     {
252                         return PLDM_INVALID_BIOS_ATTR_HANDLE;
253                     }
254                 }
255                 break;
256             }
257             case PLDM_BIOS_INTEGER:
258             case PLDM_BIOS_INTEGER_READ_ONLY:
259             case PLDM_BIOS_STRING:
260             case PLDM_BIOS_STRING_READ_ONLY:
261             case PLDM_BIOS_PASSWORD:
262             case PLDM_BIOS_PASSWORD_READ_ONLY:
263                 break;
264             default:
265                 return PLDM_INVALID_BIOS_ATTR_HANDLE;
266         }
267     }
268 
269     return PLDM_SUCCESS;
270 }
271 
272 int BIOSConfig::checkAttributeValueTable(const Table& table)
273 {
274     using namespace pldm::bios::utils;
275     auto stringTable = getBIOSTable(PLDM_BIOS_STRING_TABLE);
276     auto attrTable = getBIOSTable(PLDM_BIOS_ATTR_TABLE);
277 
278     baseBIOSTableMaps.clear();
279 
280     for (auto tableEntry :
281          BIOSTableIter<PLDM_BIOS_ATTR_VAL_TABLE>(table.data(), table.size()))
282     {
283         AttributeName attributeName{};
284         AttributeType attributeType{};
285         ReadonlyStatus readonlyStatus{};
286         DisplayName displayName{};
287         Description description{};
288         MenuPath menuPath{};
289         CurrentValue currentValue{};
290         DefaultValue defaultValue{};
291         std::vector<ValueDisplayName> valueDisplayNames;
292         std::map<uint16_t, std::vector<std::string>> valueDisplayNamesMap;
293         Option options{};
294 
295         auto attrValueHandle =
296             pldm_bios_table_attr_value_entry_decode_attribute_handle(
297                 tableEntry);
298         auto attrType = static_cast<pldm_bios_attribute_type>(
299             pldm_bios_table_attr_value_entry_decode_attribute_type(tableEntry));
300 
301         auto attrEntry = pldm_bios_table_attr_find_by_handle(
302             attrTable->data(), attrTable->size(), attrValueHandle);
303         if (attrEntry == nullptr)
304         {
305             return PLDM_INVALID_BIOS_ATTR_HANDLE;
306         }
307         auto attrHandle =
308             pldm_bios_table_attr_entry_decode_attribute_handle(attrEntry);
309         auto attrNameHandle =
310             pldm_bios_table_attr_entry_decode_string_handle(attrEntry);
311 
312         auto stringEntry = pldm_bios_table_string_find_by_handle(
313             stringTable->data(), stringTable->size(), attrNameHandle);
314         if (stringEntry == nullptr)
315         {
316             return PLDM_INVALID_BIOS_ATTR_HANDLE;
317         }
318         auto strLength =
319             pldm_bios_table_string_entry_decode_string_length(stringEntry);
320         std::vector<char> buffer(strLength + 1 /* sizeof '\0' */);
321         // Preconditions are upheld therefore no error check necessary
322         pldm_bios_table_string_entry_decode_string(stringEntry, buffer.data(),
323                                                    buffer.size());
324 
325         attributeName = std::string(buffer.data(), buffer.data() + strLength);
326 
327         if (!biosAttributes.empty())
328         {
329             readonlyStatus =
330                 biosAttributes[attrHandle % biosAttributes.size()]->readOnly;
331             description =
332                 biosAttributes[attrHandle % biosAttributes.size()]->helpText;
333             displayName =
334                 biosAttributes[attrHandle % biosAttributes.size()]->displayName;
335             valueDisplayNamesMap =
336                 biosAttributes[attrHandle % biosAttributes.size()]
337                     ->valueDisplayNamesMap;
338         }
339 
340         switch (attrType)
341         {
342             case PLDM_BIOS_ENUMERATION:
343             case PLDM_BIOS_ENUMERATION_READ_ONLY:
344             {
345                 if (valueDisplayNamesMap.contains(attrHandle))
346                 {
347                     const std::vector<ValueDisplayName>& vdn =
348                         valueDisplayNamesMap[attrHandle];
349                     valueDisplayNames.insert(valueDisplayNames.end(),
350                                              vdn.begin(), vdn.end());
351                 }
352                 auto getValue =
353                     [](uint16_t handle, const Table& table) -> std::string {
354                     auto stringEntry = pldm_bios_table_string_find_by_handle(
355                         table.data(), table.size(), handle);
356 
357                     auto strLength =
358                         pldm_bios_table_string_entry_decode_string_length(
359                             stringEntry);
360                     std::vector<char> buffer(strLength + 1 /* sizeof '\0' */);
361                     // Preconditions are upheld therefore no error check
362                     // necessary
363                     pldm_bios_table_string_entry_decode_string(
364                         stringEntry, buffer.data(), buffer.size());
365 
366                     return std::string(buffer.data(),
367                                        buffer.data() + strLength);
368                 };
369 
370                 attributeType = "xyz.openbmc_project.BIOSConfig.Manager."
371                                 "AttributeType.Enumeration";
372 
373                 uint8_t pvNum;
374                 // Preconditions are upheld therefore no error check necessary
375                 pldm_bios_table_attr_entry_enum_decode_pv_num(attrEntry,
376                                                               &pvNum);
377                 std::vector<uint16_t> pvHandls(pvNum);
378                 // Preconditions are upheld therefore no error check necessary
379                 pldm_bios_table_attr_entry_enum_decode_pv_hdls(
380                     attrEntry, pvHandls.data(), pvHandls.size());
381 
382                 // get possible_value
383                 for (size_t i = 0; i < pvHandls.size(); i++)
384                 {
385                     options.push_back(
386                         std::make_tuple("xyz.openbmc_project.BIOSConfig."
387                                         "Manager.BoundType.OneOf",
388                                         getValue(pvHandls[i], *stringTable),
389                                         valueDisplayNames[i]));
390                 }
391 
392                 auto count =
393                     pldm_bios_table_attr_value_entry_enum_decode_number(
394                         tableEntry);
395                 std::vector<uint8_t> handles(count);
396                 pldm_bios_table_attr_value_entry_enum_decode_handles(
397                     tableEntry, handles.data(), handles.size());
398 
399                 // get current_value
400                 for (size_t i = 0; i < handles.size(); i++)
401                 {
402                     currentValue = getValue(pvHandls[handles[i]], *stringTable);
403                 }
404 
405                 uint8_t defNum;
406                 // Preconditions are upheld therefore no error check necessary
407                 pldm_bios_table_attr_entry_enum_decode_def_num(attrEntry,
408                                                                &defNum);
409                 std::vector<uint8_t> defIndices(defNum);
410                 pldm_bios_table_attr_entry_enum_decode_def_indices(
411                     attrEntry, defIndices.data(), defIndices.size());
412 
413                 // get default_value
414                 for (size_t i = 0; i < defIndices.size(); i++)
415                 {
416                     defaultValue =
417                         getValue(pvHandls[defIndices[i]], *stringTable);
418                 }
419 
420                 break;
421             }
422             case PLDM_BIOS_INTEGER:
423             case PLDM_BIOS_INTEGER_READ_ONLY:
424             {
425                 attributeType = "xyz.openbmc_project.BIOSConfig.Manager."
426                                 "AttributeType.Integer";
427                 currentValue = static_cast<int64_t>(
428                     pldm_bios_table_attr_value_entry_integer_decode_cv(
429                         tableEntry));
430 
431                 uint64_t lower, upper, def;
432                 uint32_t scalar;
433                 pldm_bios_table_attr_entry_integer_decode(
434                     attrEntry, &lower, &upper, &scalar, &def);
435                 options.push_back(std::make_tuple(
436                     "xyz.openbmc_project.BIOSConfig.Manager."
437                     "BoundType.LowerBound",
438                     static_cast<int64_t>(lower), attributeName));
439                 options.push_back(std::make_tuple(
440                     "xyz.openbmc_project.BIOSConfig.Manager."
441                     "BoundType.UpperBound",
442                     static_cast<int64_t>(upper), attributeName));
443                 options.push_back(std::make_tuple(
444                     "xyz.openbmc_project.BIOSConfig.Manager."
445                     "BoundType.ScalarIncrement",
446                     static_cast<int64_t>(scalar), attributeName));
447                 defaultValue = static_cast<int64_t>(def);
448                 break;
449             }
450             case PLDM_BIOS_STRING:
451             case PLDM_BIOS_STRING_READ_ONLY:
452             {
453                 attributeType = "xyz.openbmc_project.BIOSConfig.Manager."
454                                 "AttributeType.String";
455                 variable_field currentString;
456                 pldm_bios_table_attr_value_entry_string_decode_string(
457                     tableEntry, &currentString);
458                 currentValue = std::string(
459                     reinterpret_cast<const char*>(currentString.ptr),
460                     currentString.length);
461                 auto min = pldm_bios_table_attr_entry_string_decode_min_length(
462                     attrEntry);
463                 auto max = pldm_bios_table_attr_entry_string_decode_max_length(
464                     attrEntry);
465                 uint16_t def;
466                 // Preconditions are upheld therefore no error check necessary
467                 pldm_bios_table_attr_entry_string_decode_def_string_length(
468                     attrEntry, &def);
469                 std::vector<char> defString(def + 1);
470                 pldm_bios_table_attr_entry_string_decode_def_string(
471                     attrEntry, defString.data(), defString.size());
472                 options.push_back(
473                     std::make_tuple("xyz.openbmc_project.BIOSConfig.Manager."
474                                     "BoundType.MinStringLength",
475                                     static_cast<int64_t>(min), attributeName));
476                 options.push_back(
477                     std::make_tuple("xyz.openbmc_project.BIOSConfig.Manager."
478                                     "BoundType.MaxStringLength",
479                                     static_cast<int64_t>(max), attributeName));
480                 defaultValue = defString.data();
481                 break;
482             }
483             case PLDM_BIOS_PASSWORD:
484             case PLDM_BIOS_PASSWORD_READ_ONLY:
485             {
486                 attributeType = "xyz.openbmc_project.BIOSConfig.Manager."
487                                 "AttributeType.Password";
488                 break;
489             }
490             default:
491                 return PLDM_INVALID_BIOS_ATTR_HANDLE;
492         }
493         baseBIOSTableMaps.emplace(
494             std::move(attributeName),
495             std::make_tuple(attributeType, readonlyStatus, displayName,
496                             description, menuPath, currentValue, defaultValue,
497                             std::move(options)));
498     }
499 
500     return PLDM_SUCCESS;
501 }
502 
503 void BIOSConfig::updateBaseBIOSTableProperty()
504 {
505     constexpr static auto biosConfigPath =
506         "/xyz/openbmc_project/bios_config/manager";
507     constexpr static auto biosConfigInterface =
508         "xyz.openbmc_project.BIOSConfig.Manager";
509     constexpr static auto biosConfigPropertyName = "BaseBIOSTable";
510     constexpr static auto dbusProperties = "org.freedesktop.DBus.Properties";
511 
512     if (baseBIOSTableMaps.empty())
513     {
514         return;
515     }
516 
517     try
518     {
519         auto& bus = dbusHandler->getBus();
520         auto service =
521             dbusHandler->getService(biosConfigPath, biosConfigInterface);
522         auto method = bus.new_method_call(service.c_str(), biosConfigPath,
523                                           dbusProperties, "Set");
524         std::variant<BaseBIOSTable> value = baseBIOSTableMaps;
525         method.append(biosConfigInterface, biosConfigPropertyName, value);
526         bus.call_noreply(method, dbusTimeout);
527     }
528     catch (const std::exception& e)
529     {
530         error("Failed to update BaseBIOSTable property, error - {ERROR}",
531               "ERROR", e);
532     }
533 }
534 
535 void BIOSConfig::constructAttributes()
536 {
537     info("Bios Attribute file path: {PATH}", "PATH",
538          (jsonDir / sysType / attributesJsonFile));
539     load(jsonDir / sysType / attributesJsonFile, [this](const Json& entry) {
540         std::string attrType = entry.at("attribute_type");
541         if (attrType == "string")
542         {
543             constructAttribute<BIOSStringAttribute>(entry);
544         }
545         else if (attrType == "integer")
546         {
547             constructAttribute<BIOSIntegerAttribute>(entry);
548         }
549         else if (attrType == "enum")
550         {
551             constructAttribute<BIOSEnumAttribute>(entry);
552         }
553     });
554 }
555 
556 void BIOSConfig::buildAndStoreAttrTables(const Table& stringTable)
557 {
558     BIOSStringTable biosStringTable(stringTable);
559 
560     if (biosAttributes.empty())
561     {
562         return;
563     }
564 
565     BaseBIOSTable biosTable{};
566     constexpr auto biosObjPath = "/xyz/openbmc_project/bios_config/manager";
567     constexpr auto biosInterface = "xyz.openbmc_project.BIOSConfig.Manager";
568 
569     try
570     {
571         auto& bus = dbusHandler->getBus();
572         auto service = dbusHandler->getService(biosObjPath, biosInterface);
573         auto method =
574             bus.new_method_call(service.c_str(), biosObjPath,
575                                 "org.freedesktop.DBus.Properties", "Get");
576         method.append(biosInterface, "BaseBIOSTable");
577         auto reply = bus.call(method, dbusTimeout);
578         std::variant<BaseBIOSTable> varBiosTable{};
579         reply.read(varBiosTable);
580         biosTable = std::get<BaseBIOSTable>(varBiosTable);
581     }
582     // Failed to read the BaseBIOSTable, so update the BaseBIOSTable with the
583     // default values populated from the BIOS JSONs to keep PLDM and
584     // bios-settings-manager in sync
585     catch (const std::exception& e)
586     {
587         error("Failed to read BaseBIOSTable property, error - {ERROR}", "ERROR",
588               e);
589     }
590 
591     Table attrTable, attrValueTable;
592 
593     for (auto& attr : biosAttributes)
594     {
595         try
596         {
597             auto iter = biosTable.find(attr->name);
598             if (iter == biosTable.end())
599             {
600                 attr->constructEntry(biosStringTable, attrTable, attrValueTable,
601                                      std::nullopt);
602             }
603             else
604             {
605                 attr->constructEntry(
606                     biosStringTable, attrTable, attrValueTable,
607                     std::get<static_cast<uint8_t>(Index::currentValue)>(
608                         iter->second));
609             }
610         }
611         catch (const std::exception& e)
612         {
613             error(
614                 "Failed to construct table entry for attribute '{ATTRIBUTE}', error - {ERROR}",
615                 "ATTRIBUTE", attr->name, "ERROR", e);
616         }
617     }
618 
619     table::appendPadAndChecksum(attrTable);
620     table::appendPadAndChecksum(attrValueTable);
621     setBIOSTable(PLDM_BIOS_ATTR_TABLE, attrTable);
622     setBIOSTable(PLDM_BIOS_ATTR_VAL_TABLE, attrValueTable);
623 }
624 
625 std::optional<Table> BIOSConfig::buildAndStoreStringTable()
626 {
627     std::set<std::string> strings;
628     load(jsonDir / sysType / attributesJsonFile, [&strings](const Json& entry) {
629         if (entry.at("attribute_type") == "enum")
630         {
631             strings.emplace(entry.at("attribute_name"));
632             auto possibleValues = entry.at("possible_values");
633             for (auto& pv : possibleValues)
634             {
635                 strings.emplace(pv);
636             }
637         }
638         else
639         {
640             strings.emplace(entry.at("attribute_name"));
641         }
642     });
643 
644     if (strings.empty())
645     {
646         return std::nullopt;
647     }
648 
649     Table table;
650     for (const auto& elem : strings)
651     {
652         table::string::constructEntry(table, elem);
653     }
654 
655     table::appendPadAndChecksum(table);
656     setBIOSTable(PLDM_BIOS_STRING_TABLE, table);
657     return table;
658 }
659 
660 void BIOSConfig::storeTable(const fs::path& path, const Table& table)
661 {
662     BIOSTable biosTable(path.c_str());
663     biosTable.store(table);
664 }
665 
666 std::optional<Table> BIOSConfig::loadTable(const fs::path& path)
667 {
668     BIOSTable biosTable(path.c_str());
669     if (biosTable.isEmpty())
670     {
671         return std::nullopt;
672     }
673 
674     Table table;
675     biosTable.load(table);
676     return table;
677 }
678 
679 void BIOSConfig::load(const fs::path& filePath, ParseHandler handler)
680 {
681     std::ifstream file;
682     Json jsonConf;
683     if (fs::exists(filePath))
684     {
685         try
686         {
687             file.open(filePath);
688             jsonConf = Json::parse(file);
689             auto entries = jsonConf.at("entries");
690             for (auto& entry : entries)
691             {
692                 try
693                 {
694                     handler(entry);
695                 }
696                 catch (const std::exception& e)
697                 {
698                     error(
699                         "Failed to parse JSON config file at path '{PATH}', error - {ERROR}",
700                         "PATH", filePath, "ERROR", e);
701                 }
702             }
703         }
704         catch (const std::exception& e)
705         {
706             error("Failed to parse JSON config file '{PATH}', error - {ERROR}",
707                   "PATH", filePath, "ERROR", e);
708         }
709     }
710 }
711 
712 std::string BIOSConfig::decodeStringFromStringEntry(
713     const pldm_bios_string_table_entry* stringEntry)
714 {
715     auto strLength =
716         pldm_bios_table_string_entry_decode_string_length(stringEntry);
717     std::vector<char> buffer(strLength + 1 /* sizeof '\0' */);
718     // Preconditions are upheld therefore no error check necessary
719     pldm_bios_table_string_entry_decode_string(stringEntry, buffer.data(),
720                                                buffer.size());
721     return std::string(buffer.data(), buffer.data() + strLength);
722 }
723 
724 std::string BIOSConfig::displayStringHandle(
725     uint16_t handle, uint8_t index, const std::optional<Table>& attrTable,
726     const std::optional<Table>& stringTable)
727 {
728     auto attrEntry = pldm_bios_table_attr_find_by_handle(
729         attrTable->data(), attrTable->size(), handle);
730     uint8_t pvNum;
731     int rc = pldm_bios_table_attr_entry_enum_decode_pv_num(attrEntry, &pvNum);
732     if (rc != PLDM_SUCCESS)
733     {
734         error(
735             "Failed to decode BIOS table possible values for attribute entry, response code '{RC}'",
736             "RC", rc);
737         throw std::runtime_error(
738             "Failed to decode BIOS table possible values for attribute entry");
739     }
740 
741     std::vector<uint16_t> pvHandls(pvNum);
742     // Preconditions are upheld therefore no error check necessary
743     pldm_bios_table_attr_entry_enum_decode_pv_hdls(attrEntry, pvHandls.data(),
744                                                    pvHandls.size());
745 
746     std::string displayString = std::to_string(pvHandls[index]);
747 
748     auto stringEntry = pldm_bios_table_string_find_by_handle(
749         stringTable->data(), stringTable->size(), pvHandls[index]);
750 
751     auto decodedStr = decodeStringFromStringEntry(stringEntry);
752 
753     return decodedStr + "(" + displayString + ")";
754 }
755 
756 void BIOSConfig::traceBIOSUpdate(
757     const pldm_bios_attr_val_table_entry* attrValueEntry,
758     const pldm_bios_attr_table_entry* attrEntry, bool isBMC)
759 {
760     auto stringTable = getBIOSTable(PLDM_BIOS_STRING_TABLE);
761     auto attrTable = getBIOSTable(PLDM_BIOS_ATTR_TABLE);
762 
763     auto [attrHandle,
764           attrType] = table::attribute_value::decodeHeader(attrValueEntry);
765 
766     auto attrHeader = table::attribute::decodeHeader(attrEntry);
767     BIOSStringTable biosStringTable(*stringTable);
768     auto attrName = biosStringTable.findString(attrHeader.stringHandle);
769 
770     switch (attrType)
771     {
772         case PLDM_BIOS_ENUMERATION:
773         case PLDM_BIOS_ENUMERATION_READ_ONLY:
774         {
775             auto count = pldm_bios_table_attr_value_entry_enum_decode_number(
776                 attrValueEntry);
777             std::vector<uint8_t> handles(count);
778             pldm_bios_table_attr_value_entry_enum_decode_handles(
779                 attrValueEntry, handles.data(), handles.size());
780 
781             for (uint8_t handle : handles)
782             {
783                 auto nwVal = displayStringHandle(attrHandle, handle, attrTable,
784                                                  stringTable);
785                 auto chkBMC = isBMC ? "true" : "false";
786                 info(
787                     "BIOS attribute '{ATTRIBUTE}' updated to value '{VALUE}' by BMC '{CHECK_BMC}'",
788                     "ATTRIBUTE", attrName, "VALUE", nwVal, "CHECK_BMC", chkBMC);
789             }
790             break;
791         }
792         case PLDM_BIOS_INTEGER:
793         case PLDM_BIOS_INTEGER_READ_ONLY:
794         {
795             auto value =
796                 table::attribute_value::decodeIntegerEntry(attrValueEntry);
797             auto chkBMC = isBMC ? "true" : "false";
798             info(
799                 "BIOS attribute '{ATTRIBUTE}' updated to value '{VALUE}' by BMC '{CHECK_BMC}'",
800                 "ATTRIBUTE", attrName, "VALUE", value, "CHECK_BMC", chkBMC);
801             break;
802         }
803         case PLDM_BIOS_STRING:
804         case PLDM_BIOS_STRING_READ_ONLY:
805         {
806             auto value =
807                 table::attribute_value::decodeStringEntry(attrValueEntry);
808             auto chkBMC = isBMC ? "true" : "false";
809             info(
810                 "BIOS attribute '{ATTRIBUTE}' updated to value '{VALUE}' by BMC '{CHECK_BMC}'",
811                 "ATTRIBUTE", attrName, "VALUE", value, "CHECK_BMC", chkBMC);
812             break;
813         }
814         default:
815             break;
816     };
817 }
818 
819 int BIOSConfig::checkAttrValueToUpdate(
820     const pldm_bios_attr_val_table_entry* attrValueEntry,
821     const pldm_bios_attr_table_entry* attrEntry, Table&)
822 
823 {
824     auto [attrHandle,
825           attrType] = table::attribute_value::decodeHeader(attrValueEntry);
826 
827     switch (attrType)
828     {
829         case PLDM_BIOS_ENUMERATION:
830         case PLDM_BIOS_ENUMERATION_READ_ONLY:
831         {
832             auto value =
833                 table::attribute_value::decodeEnumEntry(attrValueEntry);
834             auto [pvHdls,
835                   defIndex] = table::attribute::decodeEnumEntry(attrEntry);
836             if (!(value.size() == 1))
837             {
838                 return PLDM_ERROR_INVALID_LENGTH;
839             }
840             if (value[0] >= pvHdls.size())
841             {
842                 error(
843                     "Invalid index '{INDEX}' encountered for Enum type BIOS attribute",
844                     "INDEX", value[0]);
845                 return PLDM_ERROR_INVALID_DATA;
846             }
847             return PLDM_SUCCESS;
848         }
849         case PLDM_BIOS_INTEGER:
850         case PLDM_BIOS_INTEGER_READ_ONLY:
851         {
852             auto value =
853                 table::attribute_value::decodeIntegerEntry(attrValueEntry);
854             auto [lower, upper, scalar,
855                   def] = table::attribute::decodeIntegerEntry(attrEntry);
856 
857             if (value < lower || value > upper)
858             {
859                 error(
860                     "Out of range index '{ATTRIBUTE_VALUE}' encountered for Integer type BIOS attribute for the lower bound '{LOWER}', the upper bound '{UPPER}' and the scalar value '{SCALAR}'.",
861                     "ATTRIBUTE_VALUE", value, "LOWER", lower, "UPPER", upper,
862                     "SCALAR", scalar);
863                 return PLDM_ERROR_INVALID_DATA;
864             }
865             return PLDM_SUCCESS;
866         }
867         case PLDM_BIOS_STRING:
868         case PLDM_BIOS_STRING_READ_ONLY:
869         {
870             auto stringConf = table::attribute::decodeStringEntry(attrEntry);
871             auto value =
872                 table::attribute_value::decodeStringEntry(attrValueEntry);
873             if (value.size() < stringConf.minLength ||
874                 value.size() > stringConf.maxLength)
875             {
876                 error(
877                     "Invalid length '{LENGTH}' encountered for string type BIOS attribute value '{ATTRIBUTE_VALUE}' when minimum string entry length '{MIN_LEN}' and maximum string entry length '{MAX_LEN}'",
878                     "ATTRIBUTE_VALUE", value, "LENGTH", value.size(), "MIN_LEN",
879                     stringConf.minLength, "MAX_LEN", stringConf.maxLength);
880                 return PLDM_ERROR_INVALID_LENGTH;
881             }
882             return PLDM_SUCCESS;
883         }
884         default:
885             error("ReadOnly or Unsupported type '{TYPE}'", "TYPE", attrType);
886             return PLDM_ERROR;
887     };
888 }
889 
890 int BIOSConfig::setAttrValue(const void* entry, size_t size, bool isBMC,
891                              bool updateDBus, bool updateBaseBIOSTable)
892 {
893     auto attrValueTable = getBIOSTable(PLDM_BIOS_ATTR_VAL_TABLE);
894     auto attrTable = getBIOSTable(PLDM_BIOS_ATTR_TABLE);
895     auto stringTable = getBIOSTable(PLDM_BIOS_STRING_TABLE);
896     if (!attrValueTable || !attrTable || !stringTable)
897     {
898         return PLDM_BIOS_TABLE_UNAVAILABLE;
899     }
900 
901     auto attrValueEntry =
902         reinterpret_cast<const pldm_bios_attr_val_table_entry*>(entry);
903 
904     auto attrValHeader = table::attribute_value::decodeHeader(attrValueEntry);
905 
906     auto attrEntry =
907         table::attribute::findByHandle(*attrTable, attrValHeader.attrHandle);
908     if (!attrEntry)
909     {
910         return PLDM_ERROR;
911     }
912 
913     auto rc = checkAttrValueToUpdate(attrValueEntry, attrEntry, *stringTable);
914     if (rc != PLDM_SUCCESS)
915     {
916         return rc;
917     }
918 
919     auto destTable =
920         table::attribute_value::updateTable(*attrValueTable, entry, size);
921 
922     if (!destTable)
923     {
924         return PLDM_ERROR;
925     }
926 
927     try
928     {
929         auto attrHeader = table::attribute::decodeHeader(attrEntry);
930 
931         BIOSStringTable biosStringTable(*stringTable);
932         auto attrName = biosStringTable.findString(attrHeader.stringHandle);
933         auto iter = std::find_if(
934             biosAttributes.begin(), biosAttributes.end(),
935             [&attrName](const auto& attr) { return attr->name == attrName; });
936 
937         if (iter == biosAttributes.end())
938         {
939             return PLDM_ERROR;
940         }
941         if (updateDBus)
942         {
943             (*iter)->setAttrValueOnDbus(attrValueEntry, attrEntry,
944                                         biosStringTable);
945         }
946     }
947     catch (const std::exception& e)
948     {
949         error("Set attribute value error - {ERROR}", "ERROR", e);
950         return PLDM_ERROR;
951     }
952 
953     setBIOSTable(PLDM_BIOS_ATTR_VAL_TABLE, *destTable, updateBaseBIOSTable);
954 
955     traceBIOSUpdate(attrValueEntry, attrEntry, isBMC);
956 
957     return PLDM_SUCCESS;
958 }
959 
960 void BIOSConfig::removeTables()
961 {
962     try
963     {
964         fs::remove(tableDir / stringTableFile);
965         fs::remove(tableDir / attrTableFile);
966         fs::remove(tableDir / attrValueTableFile);
967     }
968     catch (const std::exception& e)
969     {
970         error("Remove the tables error - {ERROR}", "ERROR", e);
971     }
972 }
973 
974 void BIOSConfig::processBiosAttrChangeNotification(
975     const DbusChObjProperties& chProperties, uint32_t biosAttrIndex)
976 {
977     const auto& dBusMap = biosAttributes[biosAttrIndex]->getDBusMap();
978     const auto& propertyName = dBusMap->propertyName;
979     const auto& attrName = biosAttributes[biosAttrIndex]->name;
980 
981     const auto it = chProperties.find(propertyName);
982     if (it == chProperties.end())
983     {
984         return;
985     }
986 
987     PropertyValue newPropVal = it->second;
988     auto stringTable = getBIOSTable(PLDM_BIOS_STRING_TABLE);
989     if (!stringTable.has_value())
990     {
991         error("BIOS string table unavailable");
992         return;
993     }
994     BIOSStringTable biosStringTable(*stringTable);
995     uint16_t attrNameHdl{};
996     try
997     {
998         attrNameHdl = biosStringTable.findHandle(attrName);
999     }
1000     catch (const std::invalid_argument& e)
1001     {
1002         error(
1003             "Missing handle for attribute '{ATTRIBUTE}' in BIOS String Table, error - '{ERROR}'",
1004             "ATTRIBUTE", attrName, "ERROR", e);
1005         return;
1006     }
1007 
1008     auto attrTable = getBIOSTable(PLDM_BIOS_ATTR_TABLE);
1009     if (!attrTable.has_value())
1010     {
1011         error("BIOS Attribute table not present");
1012         return;
1013     }
1014     const struct pldm_bios_attr_table_entry* tableEntry =
1015         table::attribute::findByStringHandle(*attrTable, attrNameHdl);
1016     if (tableEntry == nullptr)
1017     {
1018         error(
1019             "Failed to find attribute {ATTRIBUTE} in BIOS Attribute table with attribute handle '{ATTR_HANDLE}'",
1020             "ATTRIBUTE", attrName, "ATTR_HANDLE", attrNameHdl);
1021         return;
1022     }
1023 
1024     auto [attrHdl, attrType,
1025           stringHdl] = table::attribute::decodeHeader(tableEntry);
1026 
1027     auto attrValueSrcTable = getBIOSTable(PLDM_BIOS_ATTR_VAL_TABLE);
1028 
1029     if (!attrValueSrcTable.has_value())
1030     {
1031         error("Attribute value table not present");
1032         return;
1033     }
1034 
1035     Table newValue;
1036     auto rc = biosAttributes[biosAttrIndex]->updateAttrVal(
1037         newValue, attrHdl, attrType, newPropVal);
1038     if (rc != PLDM_SUCCESS)
1039     {
1040         error(
1041             "Failed to update the attribute value table for attribute handle '{ATTR_HANDLE}' and  attribute type '{TYPE}'",
1042             "ATTR_HANDLE", attrHdl, "TYPE", attrType);
1043         return;
1044     }
1045     auto destTable = table::attribute_value::updateTable(
1046         *attrValueSrcTable, newValue.data(), newValue.size());
1047     if (destTable.has_value())
1048     {
1049         storeTable(tableDir / attrValueTableFile, *destTable);
1050     }
1051 
1052     rc = setAttrValue(newValue.data(), newValue.size(), true, false);
1053     if (rc != PLDM_SUCCESS)
1054     {
1055         error(
1056             "Failed to setAttrValue on base bios table and dbus, response code '{RC}'",
1057             "RC", rc);
1058     }
1059 }
1060 
1061 uint16_t BIOSConfig::findAttrHandle(const std::string& attrName)
1062 {
1063     auto stringTable = getBIOSTable(PLDM_BIOS_STRING_TABLE);
1064     auto attrTable = getBIOSTable(PLDM_BIOS_ATTR_TABLE);
1065 
1066     BIOSStringTable biosStringTable(*stringTable);
1067     pldm::bios::utils::BIOSTableIter<PLDM_BIOS_ATTR_TABLE> attrTableIter(
1068         attrTable->data(), attrTable->size());
1069     auto stringHandle = biosStringTable.findHandle(attrName);
1070 
1071     for (auto entry : pldm::bios::utils::BIOSTableIter<PLDM_BIOS_ATTR_TABLE>(
1072              attrTable->data(), attrTable->size()))
1073     {
1074         auto header = table::attribute::decodeHeader(entry);
1075         if (header.stringHandle == stringHandle)
1076         {
1077             return header.attrHandle;
1078         }
1079     }
1080 
1081     throw std::invalid_argument("Unknown attribute Name");
1082 }
1083 
1084 void BIOSConfig::constructPendingAttribute(
1085     const PendingAttributes& pendingAttributes)
1086 {
1087     std::vector<uint16_t> listOfHandles{};
1088 
1089     for (auto& attribute : pendingAttributes)
1090     {
1091         std::string attributeName = attribute.first;
1092         auto& [attributeType, attributevalue] = attribute.second;
1093 
1094         auto iter = std::find_if(biosAttributes.begin(), biosAttributes.end(),
1095                                  [&attributeName](const auto& attr) {
1096                                      return attr->name == attributeName;
1097                                  });
1098 
1099         if (iter == biosAttributes.end())
1100         {
1101             error("Wrong attribute name {NAME}", "NAME", attributeName);
1102             continue;
1103         }
1104 
1105         Table attrValueEntry(sizeof(pldm_bios_attr_val_table_entry), 0);
1106         auto entry = reinterpret_cast<pldm_bios_attr_val_table_entry*>(
1107             attrValueEntry.data());
1108 
1109         auto handler = findAttrHandle(attributeName);
1110         auto type =
1111             BIOSConfigManager::convertAttributeTypeFromString(attributeType);
1112 
1113         if (type != BIOSConfigManager::AttributeType::Enumeration &&
1114             type != BIOSConfigManager::AttributeType::String &&
1115             type != BIOSConfigManager::AttributeType::Integer)
1116         {
1117             error("Attribute type '{TYPE}' not supported", "TYPE",
1118                   attributeType);
1119             continue;
1120         }
1121 
1122         const auto [attrType, readonlyStatus, displayName, description,
1123                     menuPath, currentValue, defaultValue,
1124                     option] = baseBIOSTableMaps.at(attributeName);
1125 
1126         entry->attr_handle = htole16(handler);
1127 
1128         // Need to verify that the current value has really changed
1129         if (attributeType == attrType && attributevalue != currentValue)
1130         {
1131             listOfHandles.emplace_back(htole16(handler));
1132         }
1133 
1134         (*iter)->generateAttributeEntry(attributevalue, attrValueEntry);
1135 
1136         setAttrValue(attrValueEntry.data(), attrValueEntry.size(), true);
1137     }
1138 
1139     if (listOfHandles.size())
1140     {
1141 #ifdef OEM_IBM
1142         auto rc = pldm::responder::platform::sendBiosAttributeUpdateEvent(
1143             eid, instanceIdDb, listOfHandles, handler);
1144         if (rc != PLDM_SUCCESS)
1145         {
1146             return;
1147         }
1148 #endif
1149     }
1150 }
1151 
1152 void BIOSConfig::listenPendingAttributes()
1153 {
1154     constexpr auto objPath = "/xyz/openbmc_project/bios_config/manager";
1155     constexpr auto objInterface = "xyz.openbmc_project.BIOSConfig.Manager";
1156 
1157     using namespace sdbusplus::bus::match::rules;
1158     auto updateBIOSMatch = std::make_unique<sdbusplus::bus::match_t>(
1159         pldm::utils::DBusHandler::getBus(),
1160         propertiesChanged(objPath, objInterface),
1161         [this](sdbusplus::message_t& msg) {
1162             constexpr auto propertyName = "PendingAttributes";
1163 
1164             using Value =
1165                 std::variant<std::string, PendingAttributes, BaseBIOSTable>;
1166             using Properties = std::map<DbusProp, Value>;
1167 
1168             Properties props{};
1169             std::string intf;
1170             msg.read(intf, props);
1171 
1172             auto valPropMap = props.find(propertyName);
1173             if (valPropMap == props.end())
1174             {
1175                 return;
1176             }
1177 
1178             PendingAttributes pendingAttributes =
1179                 std::get<PendingAttributes>(valPropMap->second);
1180             this->constructPendingAttribute(pendingAttributes);
1181         });
1182 
1183     biosAttrMatch.emplace_back(std::move(updateBIOSMatch));
1184 }
1185 
1186 } // namespace bios
1187 } // namespace responder
1188 } // namespace pldm
1189