xref: /openbmc/libcper/cper-parse.c (revision aacf0e26) 
1 /**
2  * Describes high level functions for converting an entire CPER log, and functions for parsing
3  * CPER headers and section descriptions into an intermediate JSON format.
4  *
5  * Author: Lawrence.Tang@arm.com
6  **/
7 
8 #include <stdio.h>
9 #include "json.h"
10 #include "b64.h"
11 #include "edk/Cper.h"
12 #include "cper-parse.h"
13 #include "cper-utils.h"
14 #include "sections/cper-section-generic.h"
15 #include "sections/cper-section-ia32x64.h"
16 #include "sections/cper-section-arm.h"
17 #include "sections/cper-section-memory.h"
18 #include "sections/cper-section-pcie.h"
19 #include "sections/cper-section-pci-bus.h"
20 #include "sections/cper-section-pci-dev.h"
21 #include "sections/cper-section-firmware.h"
22 #include "sections/cper-section-dmar-generic.h"
23 #include "sections/cper-section-dmar-vtd.h"
24 #include "sections/cper-section-dmar-iommu.h"
25 #include "sections/cper-section-ccix-per.h"
26 #include "sections/cper-section-cxl-protocol.h"
27 #include "sections/cper-section-ipf.h"
28 #include "sections/cper-section-cxl-component.h"
29 
30 //Private pre-definitions.
31 json_object* cper_header_to_ir(EFI_COMMON_ERROR_RECORD_HEADER* header);
32 json_object* cper_section_descriptor_to_ir(EFI_ERROR_SECTION_DESCRIPTOR* section_descriptor);
33 json_object* cper_section_to_ir(FILE* handle, EFI_ERROR_SECTION_DESCRIPTOR* descriptor);
34 
35 //Reads a CPER log file at the given file location, and returns an intermediate
36 //JSON representation of this CPER record.
37 json_object* cper_to_ir(FILE* cper_file)
38 {
39     //Ensure this is really a CPER log.
40     EFI_COMMON_ERROR_RECORD_HEADER header;
41     fseek(cper_file, 0, SEEK_SET);
42     if (fread(&header, sizeof(EFI_COMMON_ERROR_RECORD_HEADER), 1, cper_file) != 1)
43     {
44         printf("Invalid CPER file: Invalid length (log too short).\n");
45         return NULL;
46     }
47 
48     //Check if the header contains the magic bytes ("CPER").
49     if (header.SignatureStart != EFI_ERROR_RECORD_SIGNATURE_START) {
50         printf("Invalid CPER file: Invalid header (incorrect signature).\n");
51         return NULL;
52     }
53 
54     //Create the header JSON object from the read bytes.
55     json_object* header_ir = cper_header_to_ir(&header);
56 
57     //Read the appropriate number of section descriptors & sections, and convert them into IR format.
58     json_object* section_descriptors_ir = json_object_new_array();
59     json_object* sections_ir = json_object_new_array();
60     for (int i=0; i<header.SectionCount; i++)
61     {
62         //Create the section descriptor.
63         EFI_ERROR_SECTION_DESCRIPTOR section_descriptor;
64         if (fread(&section_descriptor, sizeof(EFI_ERROR_SECTION_DESCRIPTOR), 1, cper_file) != 1)
65         {
66             printf("Invalid number of section headers: Header states %d sections, could not read section %d.\n", header.SectionCount, i+1);
67             return NULL;
68         }
69         json_object_array_add(section_descriptors_ir, cper_section_descriptor_to_ir(&section_descriptor));
70 
71         //Read the section itself.
72         json_object_array_add(sections_ir, cper_section_to_ir(cper_file, &section_descriptor));
73     }
74 
75     //Add the header, section descriptors, and sections to a parent object.
76     json_object* parent = json_object_new_object();
77     json_object_object_add(parent, "header", header_ir);
78     json_object_object_add(parent, "sectionDescriptors", section_descriptors_ir);
79     json_object_object_add(parent, "sections", sections_ir);
80 
81     return parent;
82 }
83 
84 //Converts a parsed CPER record header into intermediate JSON object format.
85 json_object* cper_header_to_ir(EFI_COMMON_ERROR_RECORD_HEADER* header)
86 {
87     json_object* header_ir = json_object_new_object();
88 
89     //Revision/version information.
90     json_object_object_add(header_ir, "revision", revision_to_ir(header->Revision));
91 
92     //Section count.
93     json_object_object_add(header_ir, "sectionCount", json_object_new_int(header->SectionCount));
94 
95     //Error severity (with interpreted string version).
96     json_object* error_severity = json_object_new_object();
97     json_object_object_add(error_severity, "code", json_object_new_uint64(header->ErrorSeverity));
98     json_object_object_add(error_severity, "name", json_object_new_string(severity_to_string(header->ErrorSeverity)));
99     json_object_object_add(header_ir, "severity", error_severity);
100 
101     //The validation bits for each section.
102     json_object* validation_bits = bitfield_to_ir(header->ValidationBits, 3, CPER_HEADER_VALID_BITFIELD_NAMES);
103     json_object_object_add(header_ir, "validationBits", validation_bits);
104 
105     //Total length of the record (including headers) in bytes.
106     json_object_object_add(header_ir, "recordLength", json_object_new_uint64(header->RecordLength));
107 
108     //If a timestamp exists according to validation bits, then add it.
109     if (header->ValidationBits & 0b10)
110     {
111         char timestamp_string[TIMESTAMP_LENGTH];
112         timestamp_to_string(timestamp_string, &header->TimeStamp);
113 
114         json_object_object_add(header_ir, "timestamp", json_object_new_string(timestamp_string));
115         json_object_object_add(header_ir, "timestampIsPrecise", json_object_new_boolean(header->TimeStamp.Flag));
116     }
117 
118     //If a platform ID exists according to the validation bits, then add it.
119     if (header->ValidationBits & 0b1)
120     {
121         char platform_string[GUID_STRING_LENGTH];
122         guid_to_string(platform_string, &header->PlatformID);
123         json_object_object_add(header_ir, "platformID", json_object_new_string(platform_string));
124     }
125 
126     //If a partition ID exists according to the validation bits, then add it.
127     if (header->ValidationBits & 0b100)
128     {
129         char partition_string[GUID_STRING_LENGTH];
130         guid_to_string(partition_string, &header->PartitionID);
131         json_object_object_add(header_ir, "partitionID", json_object_new_string(partition_string));
132     }
133 
134     //Creator ID of the header.
135     char creator_string[GUID_STRING_LENGTH];
136     guid_to_string(creator_string, &header->CreatorID);
137     json_object_object_add(header_ir, "creatorID", json_object_new_string(creator_string));
138 
139     //Notification type for the header. Some defined types are available.
140     json_object* notification_type = json_object_new_object();
141     char notification_type_string[GUID_STRING_LENGTH];
142     guid_to_string(notification_type_string, &header->NotificationType);
143     json_object_object_add(notification_type, "guid", json_object_new_string(notification_type_string));
144 
145     //Add the human readable notification type if possible.
146     char* notification_type_readable = "Unknown";
147     if (guid_equal(&header->NotificationType, &gEfiEventNotificationTypeCmcGuid))
148         notification_type_readable = "CMC";
149     else if (guid_equal(&header->NotificationType, &gEfiEventNotificationTypeCpeGuid))
150         notification_type_readable = "CPE";
151     else if (guid_equal(&header->NotificationType, &gEfiEventNotificationTypeMceGuid))
152         notification_type_readable = "MCE";
153     else if (guid_equal(&header->NotificationType, &gEfiEventNotificationTypePcieGuid))
154         notification_type_readable = "PCIe";
155     else if (guid_equal(&header->NotificationType, &gEfiEventNotificationTypeInitGuid))
156         notification_type_readable = "INIT";
157     else if (guid_equal(&header->NotificationType, &gEfiEventNotificationTypeNmiGuid))
158         notification_type_readable = "NMI";
159     else if (guid_equal(&header->NotificationType, &gEfiEventNotificationTypeBootGuid))
160         notification_type_readable = "Boot";
161     else if (guid_equal(&header->NotificationType, &gEfiEventNotificationTypeDmarGuid))
162         notification_type_readable = "DMAr";
163     else if (guid_equal(&header->NotificationType, &gEfiEventNotificationTypeSeaGuid))
164         notification_type_readable = "SEA";
165     else if (guid_equal(&header->NotificationType, &gEfiEventNotificationTypeSeiGuid))
166         notification_type_readable = "SEI";
167     else if (guid_equal(&header->NotificationType, &gEfiEventNotificationTypePeiGuid))
168         notification_type_readable = "PEI";
169     else if (guid_equal(&header->NotificationType, &gEfiEventNotificationTypeCxlGuid))
170         notification_type_readable = "CXL Component";
171     json_object_object_add(notification_type, "type", json_object_new_string(notification_type_readable));
172     json_object_object_add(header_ir, "notificationType", notification_type);
173 
174     //The record ID for this record, unique on a given system.
175     json_object_object_add(header_ir, "recordID", json_object_new_uint64(header->RecordID));
176 
177     //Flag for the record, and a human readable form.
178     json_object* flags = integer_to_readable_pair(header->Flags,
179         sizeof(CPER_HEADER_FLAG_TYPES_KEYS) / sizeof(int),
180         CPER_HEADER_FLAG_TYPES_KEYS,
181         CPER_HEADER_FLAG_TYPES_VALUES,
182         "Unknown");
183     json_object_object_add(header_ir, "flags", flags);
184 
185     //Persistence information. Outside the scope of specification, so just a uint32 here.
186     json_object_object_add(header_ir, "persistenceInfo", json_object_new_uint64(header->PersistenceInfo));
187     return header_ir;
188 }
189 
190 //Converts the given EFI section descriptor into JSON IR format.
191 json_object* cper_section_descriptor_to_ir(EFI_ERROR_SECTION_DESCRIPTOR* section_descriptor)
192 {
193     json_object* section_descriptor_ir = json_object_new_object();
194 
195     //The offset of the section from the base of the record header, length.
196     json_object_object_add(section_descriptor_ir, "sectionOffset", json_object_new_uint64(section_descriptor->SectionOffset));
197     json_object_object_add(section_descriptor_ir, "sectionLength", json_object_new_uint64(section_descriptor->SectionLength));
198 
199     //Revision.
200     json_object_object_add(section_descriptor_ir, "revision", revision_to_ir(section_descriptor->Revision));
201 
202     //Validation bits.
203     json_object* validation_bits = bitfield_to_ir(section_descriptor->SecValidMask, 2, CPER_SECTION_DESCRIPTOR_VALID_BITFIELD_NAMES);
204     json_object_object_add(section_descriptor_ir, "validationBits", validation_bits);
205 
206     //Flag bits.
207     json_object* flags = bitfield_to_ir(section_descriptor->SectionFlags, 8, CPER_SECTION_DESCRIPTOR_FLAGS_BITFIELD_NAMES);
208     json_object_object_add(section_descriptor_ir, "flags", flags);
209 
210     //Section type (GUID).
211     json_object* section_type = json_object_new_object();
212     char section_type_string[GUID_STRING_LENGTH];
213     guid_to_string(section_type_string, &section_descriptor->SectionType);
214     json_object_object_add(section_type, "data", json_object_new_string(section_type_string));
215 
216     //Readable section type, if possible.
217     char* section_type_readable = "Unknown";
218     if (guid_equal(&section_descriptor->SectionType, &gEfiProcessorGenericErrorSectionGuid))
219         section_type_readable = "Processor Generic";
220     else if (guid_equal(&section_descriptor->SectionType, &gEfiIa32X64ProcessorErrorSectionGuid))
221         section_type_readable = "IA32/X64";
222     else if (guid_equal(&section_descriptor->SectionType, &gEfiIpfProcessorErrorSectionGuid))
223          section_type_readable = "IPF";
224     else if (guid_equal(&section_descriptor->SectionType, &gEfiArmProcessorErrorSectionGuid))
225         section_type_readable = "ARM";
226     else if (guid_equal(&section_descriptor->SectionType, &gEfiPlatformMemoryErrorSectionGuid)
227             || guid_equal(&section_descriptor->SectionType, &gEfiPlatformMemoryError2SectionGuid))
228         section_type_readable = "Platform Memory";
229     else if (guid_equal(&section_descriptor->SectionType, &gEfiPcieErrorSectionGuid))
230         section_type_readable = "PCIe";
231     else if (guid_equal(&section_descriptor->SectionType, &gEfiFirmwareErrorSectionGuid))
232         section_type_readable = "Firmware Error Record Reference";
233     else if (guid_equal(&section_descriptor->SectionType, &gEfiPciBusErrorSectionGuid))
234         section_type_readable = "PCI/PCI-X Bus";
235     else if (guid_equal(&section_descriptor->SectionType, &gEfiPciDevErrorSectionGuid))
236         section_type_readable = "PCI Component/Device";
237     else if (guid_equal(&section_descriptor->SectionType, &gEfiDMArGenericErrorSectionGuid))
238         section_type_readable = "DMAr Generic";
239     else if (guid_equal(&section_descriptor->SectionType, &gEfiDirectedIoDMArErrorSectionGuid))
240         section_type_readable = "Intel VT for Directed I/O specific DMAr section";
241     else if (guid_equal(&section_descriptor->SectionType, &gEfiIommuDMArErrorSectionGuid))
242         section_type_readable = "IOMMU specific DMAr section";
243     else if (guid_equal(&section_descriptor->SectionType, &gEfiCcixPerLogErrorSectionGuid))
244         section_type_readable = "CCIX PER Log Error";
245     else if (guid_equal(&section_descriptor->SectionType, &gEfiCxlProtocolErrorSectionGuid))
246         section_type_readable = "CXL Protocol Error";
247     else if (guid_equal(&section_descriptor->SectionType, &gEfiCxlGeneralMediaErrorSectionGuid))
248         section_type_readable = "CXL General Media Component Error";
249     else if (guid_equal(&section_descriptor->SectionType, &gEfiCxlDramEventErrorSectionGuid))
250         section_type_readable = "CXL DRAM Component Error";
251     else if (guid_equal(&section_descriptor->SectionType, &gEfiCxlPhysicalSwitchErrorSectionGuid))
252         section_type_readable = "CXL Physical Switch Component Error";
253     else if (guid_equal(&section_descriptor->SectionType, &gEfiCxlVirtualSwitchErrorSectionGuid))
254         section_type_readable = "CXL Virtual Switch Component Error";
255     else if (guid_equal(&section_descriptor->SectionType, &gEfiCxlMldPortErrorSectionGuid))
256         section_type_readable = "CXL MLD Port Component Error";
257 
258     json_object_object_add(section_type, "type", json_object_new_string(section_type_readable));
259     json_object_object_add(section_descriptor_ir, "sectionType", section_type);
260 
261     //If validation bits indicate it exists, add FRU ID.
262     if (section_descriptor->SecValidMask & 0b1)
263     {
264         char fru_id_string[GUID_STRING_LENGTH];
265         guid_to_string(fru_id_string, &section_descriptor->FruId);
266         json_object_object_add(section_descriptor_ir, "fruID", json_object_new_string(fru_id_string));
267     }
268 
269     //If validation bits indicate it exists, add FRU text.
270     if ((section_descriptor->SecValidMask & 0b10) >> 1)
271         json_object_object_add(section_descriptor_ir, "fruText", json_object_new_string(section_descriptor->FruString));
272 
273     //Section severity.
274     json_object* section_severity = json_object_new_object();
275     json_object_object_add(section_severity, "code", json_object_new_uint64(section_descriptor->Severity));
276     json_object_object_add(section_severity, "name", json_object_new_string(severity_to_string(section_descriptor->Severity)));
277     json_object_object_add(section_descriptor_ir, "severity", section_severity);
278 
279     return section_descriptor_ir;
280 }
281 
282 
283 //Converts the section described by a single given section descriptor.
284 json_object* cper_section_to_ir(FILE* handle, EFI_ERROR_SECTION_DESCRIPTOR* descriptor)
285 {
286     //Save our current position in the stream.
287     long position = ftell(handle);
288 
289     //Read section as described by the section descriptor.
290     fseek(handle, descriptor->SectionOffset, SEEK_SET);
291     void* section = malloc(descriptor->SectionLength);
292     if (fread(section, descriptor->SectionLength, 1, handle) != 1)
293     {
294         printf("Section read failed: Could not read %d bytes from global offset %d.\n",
295             descriptor->SectionLength,
296             descriptor->SectionOffset);
297         free(section);
298         return NULL;
299     }
300 
301     //Seek back to our original position.
302     fseek(handle, position, SEEK_SET);
303 
304     //Parse section to IR based on GUID.
305     json_object* result = NULL;
306     if (guid_equal(&descriptor->SectionType, &gEfiProcessorGenericErrorSectionGuid))
307         result = cper_section_generic_to_ir(section, descriptor);
308     else if (guid_equal(&descriptor->SectionType, &gEfiIa32X64ProcessorErrorSectionGuid))
309         result = cper_section_ia32x64_to_ir(section, descriptor);
310     else if (guid_equal(&descriptor->SectionType, &gEfiIpfProcessorErrorSectionGuid))
311         result = cper_section_ipf_to_ir(section, descriptor);
312     else if (guid_equal(&descriptor->SectionType, &gEfiArmProcessorErrorSectionGuid))
313         result = cper_section_arm_to_ir(section, descriptor);
314     else if (guid_equal(&descriptor->SectionType, &gEfiPlatformMemoryErrorSectionGuid))
315         result = cper_section_platform_memory_to_ir(section, descriptor);
316     else if (guid_equal(&descriptor->SectionType, &gEfiPlatformMemoryError2SectionGuid))
317         result = cper_section_platform_memory2_to_ir(section, descriptor);
318     else if (guid_equal(&descriptor->SectionType, &gEfiPcieErrorSectionGuid))
319         result = cper_section_pcie_to_ir(section, descriptor);
320     else if (guid_equal(&descriptor->SectionType, &gEfiFirmwareErrorSectionGuid))
321         result = cper_section_firmware_to_ir(section, descriptor);
322     else if (guid_equal(&descriptor->SectionType, &gEfiPciBusErrorSectionGuid))
323         result = cper_section_pci_bus_to_ir(section, descriptor);
324     else if (guid_equal(&descriptor->SectionType, &gEfiPciDevErrorSectionGuid))
325         result = cper_section_pci_dev_to_ir(section, descriptor);
326     else if (guid_equal(&descriptor->SectionType, &gEfiDMArGenericErrorSectionGuid))
327         result = cper_section_dmar_generic_to_ir(section, descriptor);
328     else if (guid_equal(&descriptor->SectionType, &gEfiDirectedIoDMArErrorSectionGuid))
329         result = cper_section_dmar_vtd_to_ir(section, descriptor);
330     else if (guid_equal(&descriptor->SectionType, &gEfiIommuDMArErrorSectionGuid))
331         result = cper_section_dmar_iommu_to_ir(section, descriptor);
332     else if (guid_equal(&descriptor->SectionType, &gEfiCcixPerLogErrorSectionGuid))
333         result = cper_section_ccix_per_to_ir(section, descriptor);
334     else if (guid_equal(&descriptor->SectionType, &gEfiCxlProtocolErrorSectionGuid))
335         result = cper_section_cxl_protocol_to_ir(section, descriptor);
336     else if (guid_equal(&descriptor->SectionType, &gEfiCxlGeneralMediaErrorSectionGuid)
337           || guid_equal(&descriptor->SectionType, &gEfiCxlDramEventErrorSectionGuid)
338           || guid_equal(&descriptor->SectionType, &gEfiCxlPhysicalSwitchErrorSectionGuid)
339           || guid_equal(&descriptor->SectionType, &gEfiCxlVirtualSwitchErrorSectionGuid)
340           || guid_equal(&descriptor->SectionType, &gEfiCxlMldPortErrorSectionGuid))
341     {
342         result = cper_section_cxl_component_to_ir(section, descriptor);
343     }
344     else
345     {
346         //Failed read, unknown GUID.
347         //Output the data as formatted base64.
348         result = json_object_new_object();
349         char* encoded = b64_encode((unsigned char*)section, descriptor->SectionLength);
350         json_object_object_add(result, "data", json_object_new_string(encoded));
351         free(encoded);
352     }
353 
354     //Free section memory, return result.
355     free(section);
356     return result;
357 }