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993532d0 | 1 | /** @file\r |
2 | \r | |
3 | Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>\r | |
4 | \r | |
5 | This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions\r | |
7 | of the BSD License which accompanies this distribution. The\r | |
8 | full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include <PiPei.h>\r | |
17 | #include <PiDxe.h>\r | |
18 | #include <PiSmm.h>\r | |
19 | #include <Library/PeiServicesTablePointerLib.h>\r | |
20 | #include <Library/PeiServicesLib.h>\r | |
21 | #include <Library/BaseLib.h>\r | |
22 | #include <Library/BaseMemoryLib.h>\r | |
23 | #include <Library/LockBoxLib.h>\r | |
24 | #include <Library/HobLib.h>\r | |
25 | #include <Library/DebugLib.h>\r | |
26 | #include <Library/PcdLib.h>\r | |
27 | #include <Protocol/SmmCommunication.h>\r | |
28 | #include <Ppi/SmmCommunication.h>\r | |
29 | #include <Ppi/SmmAccess.h>\r | |
30 | #include <Guid/AcpiS3Context.h>\r | |
31 | #include <Guid/SmmLockBox.h>\r | |
32 | \r | |
33 | #include "SmmLockBoxLibPrivate.h"\r | |
34 | \r | |
35 | #if defined (MDE_CPU_IA32)\r | |
36 | typedef struct _LIST_ENTRY64 LIST_ENTRY64;\r | |
37 | struct _LIST_ENTRY64 {\r | |
38 | LIST_ENTRY64 *ForwardLink;\r | |
39 | UINT32 Reserved1;\r | |
40 | LIST_ENTRY64 *BackLink;\r | |
41 | UINT32 Reserved2;\r | |
42 | };\r | |
43 | \r | |
44 | typedef struct {\r | |
45 | EFI_TABLE_HEADER Hdr;\r | |
46 | UINT64 SmmFirmwareVendor;\r | |
47 | UINT64 SmmFirmwareRevision;\r | |
48 | UINT64 SmmInstallConfigurationTable;\r | |
49 | UINT64 SmmIoMemRead;\r | |
50 | UINT64 SmmIoMemWrite;\r | |
51 | UINT64 SmmIoIoRead;\r | |
52 | UINT64 SmmIoIoWrite;\r | |
53 | UINT64 SmmAllocatePool;\r | |
54 | UINT64 SmmFreePool;\r | |
55 | UINT64 SmmAllocatePages;\r | |
56 | UINT64 SmmFreePages;\r | |
57 | UINT64 SmmStartupThisAp;\r | |
58 | UINT64 CurrentlyExecutingCpu;\r | |
59 | UINT64 NumberOfCpus;\r | |
60 | UINT64 CpuSaveStateSize;\r | |
61 | UINT64 CpuSaveState;\r | |
62 | UINT64 NumberOfTableEntries;\r | |
63 | UINT64 SmmConfigurationTable;\r | |
64 | } EFI_SMM_SYSTEM_TABLE2_64;\r | |
65 | \r | |
66 | typedef struct {\r | |
67 | EFI_GUID VendorGuid;\r | |
68 | UINT64 VendorTable;\r | |
69 | } EFI_CONFIGURATION_TABLE64;\r | |
70 | #endif\r | |
71 | \r | |
72 | #if defined (MDE_CPU_X64)\r | |
73 | typedef LIST_ENTRY LIST_ENTRY64;\r | |
74 | typedef EFI_SMM_SYSTEM_TABLE2 EFI_SMM_SYSTEM_TABLE2_64;\r | |
75 | typedef EFI_CONFIGURATION_TABLE EFI_CONFIGURATION_TABLE64;\r | |
76 | #endif\r | |
77 | \r | |
78 | /**\r | |
79 | This function return first node of LinkList queue.\r | |
80 | \r | |
81 | @param LockBoxQueue LinkList queue\r | |
82 | \r | |
83 | @return first node of LinkList queue\r | |
84 | **/\r | |
85 | LIST_ENTRY *\r | |
86 | InternalInitLinkDxe (\r | |
87 | IN LIST_ENTRY *LinkList\r | |
88 | )\r | |
89 | {\r | |
90 | if ((sizeof(UINTN) == sizeof(UINT32)) && (FeaturePcdGet (PcdDxeIplSwitchToLongMode)) ) {\r | |
91 | //\r | |
92 | // 32 PEI + 64 DXE\r | |
93 | //\r | |
94 | return (LIST_ENTRY *)(((LIST_ENTRY64 *)LinkList)->ForwardLink);\r | |
95 | } else {\r | |
96 | return LinkList->ForwardLink;\r | |
97 | }\r | |
98 | }\r | |
99 | \r | |
100 | /**\r | |
101 | This function return next node of LinkList.\r | |
102 | \r | |
103 | @param Link LinkList node\r | |
104 | \r | |
105 | @return next node of LinkList\r | |
106 | **/\r | |
107 | LIST_ENTRY *\r | |
108 | InternalNextLinkDxe (\r | |
109 | IN LIST_ENTRY *Link\r | |
110 | )\r | |
111 | {\r | |
112 | if ((sizeof(UINTN) == sizeof(UINT32)) && (FeaturePcdGet (PcdDxeIplSwitchToLongMode)) ) {\r | |
113 | //\r | |
114 | // 32 PEI + 64 DXE\r | |
115 | //\r | |
116 | return (LIST_ENTRY *)(((LIST_ENTRY64 *)Link)->ForwardLink);\r | |
117 | } else {\r | |
118 | return Link->ForwardLink;\r | |
119 | }\r | |
120 | }\r | |
121 | \r | |
122 | /**\r | |
123 | This function find LockBox by GUID from SMRAM.\r | |
124 | \r | |
125 | @param LockBoxQueue The LockBox queue in SMRAM\r | |
126 | @param Guid The guid to indentify the LockBox\r | |
127 | \r | |
128 | @return LockBoxData\r | |
129 | **/\r | |
130 | SMM_LOCK_BOX_DATA *\r | |
131 | InternalFindLockBoxByGuidFromSmram (\r | |
132 | IN LIST_ENTRY *LockBoxQueue,\r | |
133 | IN EFI_GUID *Guid\r | |
134 | )\r | |
135 | {\r | |
136 | LIST_ENTRY *Link;\r | |
137 | SMM_LOCK_BOX_DATA *LockBox;\r | |
138 | \r | |
139 | for (Link = InternalInitLinkDxe (LockBoxQueue);\r | |
140 | Link != LockBoxQueue;\r | |
141 | Link = InternalNextLinkDxe (Link)) {\r | |
142 | LockBox = BASE_CR (\r | |
143 | Link,\r | |
144 | SMM_LOCK_BOX_DATA,\r | |
145 | Link\r | |
146 | );\r | |
147 | if (CompareGuid (&LockBox->Guid, Guid)) {\r | |
148 | return LockBox;\r | |
149 | }\r | |
150 | }\r | |
151 | return NULL;\r | |
152 | }\r | |
153 | \r | |
154 | /**\r | |
155 | Get VendorTable by VendorGuid in Smst.\r | |
156 | \r | |
157 | @param Signature Signature of SMM_S3_RESUME_STATE\r | |
158 | @param Smst SMM system table\r | |
159 | @param VendorGuid vendor guid\r | |
160 | \r | |
161 | @return vendor table.\r | |
162 | **/\r | |
163 | VOID *\r | |
164 | InternalSmstGetVendorTableByGuid (\r | |
165 | IN UINT64 Signature,\r | |
166 | IN EFI_SMM_SYSTEM_TABLE2 *Smst,\r | |
167 | IN EFI_GUID *VendorGuid\r | |
168 | )\r | |
169 | {\r | |
170 | EFI_CONFIGURATION_TABLE *SmmConfigurationTable;\r | |
171 | UINTN NumberOfTableEntries;\r | |
172 | UINTN Index;\r | |
173 | EFI_SMM_SYSTEM_TABLE2_64 *Smst64;\r | |
174 | EFI_CONFIGURATION_TABLE64 *SmmConfigurationTable64;\r | |
175 | \r | |
176 | if ((sizeof(UINTN) == sizeof(UINT32)) && (FeaturePcdGet (PcdDxeIplSwitchToLongMode))) {\r | |
177 | //\r | |
178 | // 32 PEI + 64 DXE\r | |
179 | //\r | |
180 | Smst64 = (EFI_SMM_SYSTEM_TABLE2_64 *)Smst;\r | |
181 | SmmConfigurationTable64 = (EFI_CONFIGURATION_TABLE64 *)(UINTN)Smst64->SmmConfigurationTable;\r | |
182 | NumberOfTableEntries = (UINTN)Smst64->NumberOfTableEntries;\r | |
183 | for (Index = 0; Index < NumberOfTableEntries; Index++) {\r | |
184 | if (CompareGuid (&SmmConfigurationTable64[Index].VendorGuid, VendorGuid)) {\r | |
185 | return (VOID *)(UINTN)SmmConfigurationTable64[Index].VendorTable;\r | |
186 | }\r | |
187 | }\r | |
188 | return NULL;\r | |
189 | } else {\r | |
190 | SmmConfigurationTable = Smst->SmmConfigurationTable;\r | |
191 | NumberOfTableEntries = Smst->NumberOfTableEntries;\r | |
192 | for (Index = 0; Index < NumberOfTableEntries; Index++) {\r | |
193 | if (CompareGuid (&SmmConfigurationTable[Index].VendorGuid, VendorGuid)) {\r | |
194 | return (VOID *)SmmConfigurationTable[Index].VendorTable;\r | |
195 | }\r | |
196 | }\r | |
197 | return NULL;\r | |
198 | }\r | |
199 | }\r | |
200 | \r | |
201 | /**\r | |
202 | Get SMM LockBox context.\r | |
203 | \r | |
204 | @return SMM LockBox context.\r | |
205 | **/\r | |
206 | SMM_LOCK_BOX_CONTEXT *\r | |
207 | InternalGetSmmLockBoxContext (\r | |
208 | VOID\r | |
209 | )\r | |
210 | {\r | |
211 | EFI_SMRAM_DESCRIPTOR *SmramDescriptor;\r | |
212 | SMM_S3_RESUME_STATE *SmmS3ResumeState;\r | |
213 | VOID *GuidHob;\r | |
214 | SMM_LOCK_BOX_CONTEXT *SmmLockBoxContext;\r | |
215 | \r | |
216 | GuidHob = GetFirstGuidHob (&gEfiAcpiVariableGuid);\r | |
217 | ASSERT (GuidHob != NULL);\r | |
218 | SmramDescriptor = (EFI_SMRAM_DESCRIPTOR *) GET_GUID_HOB_DATA (GuidHob);\r | |
219 | SmmS3ResumeState = (SMM_S3_RESUME_STATE *)(UINTN)SmramDescriptor->CpuStart;\r | |
220 | \r | |
221 | SmmLockBoxContext = (SMM_LOCK_BOX_CONTEXT *)InternalSmstGetVendorTableByGuid (\r | |
222 | SmmS3ResumeState->Signature,\r | |
223 | (EFI_SMM_SYSTEM_TABLE2 *)(UINTN)SmmS3ResumeState->Smst,\r | |
224 | &gEfiSmmLockBoxCommunicationGuid\r | |
225 | );\r | |
226 | ASSERT (SmmLockBoxContext != NULL);\r | |
227 | \r | |
228 | return SmmLockBoxContext;\r | |
229 | }\r | |
230 | \r | |
231 | /**\r | |
232 | This function will restore confidential information from lockbox in SMRAM directly.\r | |
233 | \r | |
234 | @param Guid the guid to identify the confidential information\r | |
235 | @param Buffer the address of the restored confidential information\r | |
236 | NULL means restored to original address, Length MUST be NULL at same time.\r | |
237 | @param Length the length of the restored confidential information\r | |
238 | \r | |
239 | @retval RETURN_SUCCESS the information is restored successfully.\r | |
240 | @retval RETURN_WRITE_PROTECTED Buffer and Length are NULL, but the LockBox has no \r | |
241 | LOCK_BOX_ATTRIBUTE_RESTORE_IN_PLACE attribute.\r | |
242 | @retval RETURN_BUFFER_TOO_SMALL the Length is too small to hold the confidential information.\r | |
243 | @retval RETURN_NOT_FOUND the requested GUID not found.\r | |
244 | **/\r | |
245 | EFI_STATUS\r | |
246 | InternalRestoreLockBoxFromSmram (\r | |
247 | IN GUID *Guid,\r | |
248 | IN VOID *Buffer, OPTIONAL\r | |
249 | IN OUT UINTN *Length OPTIONAL\r | |
250 | )\r | |
251 | {\r | |
252 | PEI_SMM_ACCESS_PPI *SmmAccess;\r | |
253 | UINTN Index;\r | |
254 | EFI_STATUS Status;\r | |
255 | SMM_LOCK_BOX_CONTEXT *SmmLockBoxContext;\r | |
256 | LIST_ENTRY *LockBoxQueue;\r | |
257 | SMM_LOCK_BOX_DATA *LockBox;\r | |
258 | VOID *RestoreBuffer;\r | |
259 | \r | |
260 | //\r | |
261 | // Get needed resource\r | |
262 | //\r | |
263 | Status = PeiServicesLocatePpi (\r | |
264 | &gPeiSmmAccessPpiGuid,\r | |
265 | 0,\r | |
266 | NULL,\r | |
267 | (VOID **)&SmmAccess\r | |
268 | );\r | |
269 | if (!EFI_ERROR (Status)) {\r | |
270 | for (Index = 0; !EFI_ERROR (Status); Index++) {\r | |
271 | Status = SmmAccess->Open ((EFI_PEI_SERVICES **)GetPeiServicesTablePointer (), SmmAccess, Index);\r | |
272 | }\r | |
273 | }\r | |
274 | \r | |
275 | //\r | |
276 | // Get LockBox context\r | |
277 | //\r | |
278 | SmmLockBoxContext = InternalGetSmmLockBoxContext ();\r | |
279 | LockBoxQueue = (LIST_ENTRY *)(UINTN)SmmLockBoxContext->LockBoxDataAddress;\r | |
280 | \r | |
281 | //\r | |
282 | // We do NOT check Buffer address in SMRAM, because if SMRAM not locked, we trust the caller.\r | |
283 | //\r | |
284 | \r | |
285 | //\r | |
286 | // Restore this, Buffer and Length MUST be both NULL or both non-NULL\r | |
287 | //\r | |
288 | \r | |
289 | //\r | |
290 | // Find LockBox\r | |
291 | //\r | |
292 | LockBox = InternalFindLockBoxByGuidFromSmram (LockBoxQueue, Guid);\r | |
293 | if (LockBox == NULL) {\r | |
294 | //\r | |
295 | // Not found\r | |
296 | //\r | |
297 | return EFI_NOT_FOUND;\r | |
298 | }\r | |
299 | \r | |
300 | //\r | |
301 | // Set RestoreBuffer\r | |
302 | //\r | |
303 | if (Buffer != NULL) {\r | |
304 | //\r | |
305 | // restore to new buffer\r | |
306 | //\r | |
307 | RestoreBuffer = Buffer;\r | |
308 | } else {\r | |
309 | //\r | |
310 | // restore to original buffer\r | |
311 | //\r | |
312 | if ((LockBox->Attributes & LOCK_BOX_ATTRIBUTE_RESTORE_IN_PLACE) == 0) {\r | |
313 | return EFI_WRITE_PROTECTED;\r | |
314 | }\r | |
315 | RestoreBuffer = (VOID *)(UINTN)LockBox->Buffer;\r | |
316 | }\r | |
317 | \r | |
318 | //\r | |
319 | // Set RestoreLength\r | |
320 | //\r | |
321 | if (Length != NULL) {\r | |
322 | if (*Length < (UINTN)LockBox->Length) {\r | |
323 | //\r | |
324 | // Input buffer is too small to hold all data.\r | |
325 | //\r | |
326 | *Length = (UINTN)LockBox->Length;\r | |
327 | return EFI_BUFFER_TOO_SMALL;\r | |
328 | }\r | |
329 | *Length = (UINTN)LockBox->Length;\r | |
330 | }\r | |
331 | \r | |
332 | //\r | |
333 | // Restore data\r | |
334 | //\r | |
335 | CopyMem (RestoreBuffer, (VOID *)(UINTN)LockBox->SmramBuffer, (UINTN)LockBox->Length);\r | |
336 | \r | |
337 | //\r | |
338 | // Done\r | |
339 | //\r | |
340 | return EFI_SUCCESS;\r | |
341 | }\r | |
342 | \r | |
343 | /**\r | |
344 | This function will restore confidential information from all lockbox which have RestoreInPlace attribute.\r | |
345 | \r | |
346 | @retval RETURN_SUCCESS the information is restored successfully.\r | |
347 | **/\r | |
348 | EFI_STATUS\r | |
349 | InternalRestoreAllLockBoxInPlaceFromSmram (\r | |
350 | VOID\r | |
351 | )\r | |
352 | {\r | |
353 | PEI_SMM_ACCESS_PPI *SmmAccess;\r | |
354 | UINTN Index;\r | |
355 | EFI_STATUS Status;\r | |
356 | SMM_LOCK_BOX_CONTEXT *SmmLockBoxContext;\r | |
357 | LIST_ENTRY *LockBoxQueue;\r | |
358 | SMM_LOCK_BOX_DATA *LockBox;\r | |
359 | LIST_ENTRY *Link;\r | |
360 | \r | |
361 | //\r | |
362 | // Get needed resource\r | |
363 | //\r | |
364 | Status = PeiServicesLocatePpi (\r | |
365 | &gPeiSmmAccessPpiGuid,\r | |
366 | 0,\r | |
367 | NULL,\r | |
368 | (VOID **)&SmmAccess\r | |
369 | );\r | |
370 | if (!EFI_ERROR (Status)) {\r | |
371 | for (Index = 0; !EFI_ERROR (Status); Index++) {\r | |
372 | Status = SmmAccess->Open ((EFI_PEI_SERVICES **)GetPeiServicesTablePointer (), SmmAccess, Index);\r | |
373 | }\r | |
374 | }\r | |
375 | \r | |
376 | //\r | |
377 | // Get LockBox context\r | |
378 | //\r | |
379 | SmmLockBoxContext = InternalGetSmmLockBoxContext ();\r | |
380 | LockBoxQueue = (LIST_ENTRY *)(UINTN)SmmLockBoxContext->LockBoxDataAddress;\r | |
381 | \r | |
382 | //\r | |
383 | // We do NOT check Buffer address in SMRAM, because if SMRAM not locked, we trust the caller.\r | |
384 | //\r | |
385 | \r | |
386 | //\r | |
387 | // Restore all, Buffer and Length MUST be NULL\r | |
388 | //\r | |
389 | for (Link = InternalInitLinkDxe (LockBoxQueue);\r | |
390 | Link != LockBoxQueue;\r | |
391 | Link = InternalNextLinkDxe (Link)) {\r | |
392 | LockBox = BASE_CR (\r | |
393 | Link,\r | |
394 | SMM_LOCK_BOX_DATA,\r | |
395 | Link\r | |
396 | );\r | |
397 | if ((LockBox->Attributes & LOCK_BOX_ATTRIBUTE_RESTORE_IN_PLACE) != 0) {\r | |
398 | //\r | |
399 | // Restore data\r | |
400 | //\r | |
401 | CopyMem ((VOID *)(UINTN)LockBox->Buffer, (VOID *)(UINTN)LockBox->SmramBuffer, (UINTN)LockBox->Length);\r | |
402 | }\r | |
403 | }\r | |
404 | //\r | |
405 | // Done\r | |
406 | //\r | |
407 | return EFI_SUCCESS;\r | |
408 | }\r | |
409 | \r | |
410 | /**\r | |
411 | This function will save confidential information to lockbox.\r | |
412 | \r | |
413 | @param Guid the guid to identify the confidential information\r | |
414 | @param Buffer the address of the confidential information\r | |
415 | @param Length the length of the confidential information\r | |
416 | \r | |
417 | @retval RETURN_SUCCESS the information is saved successfully.\r | |
418 | @retval RETURN_INVALID_PARAMETER the Guid is NULL, or Buffer is NULL, or Length is 0\r | |
419 | @retval RETURN_ALREADY_STARTED the requested GUID already exist.\r | |
420 | @retval RETURN_OUT_OF_RESOURCES no enough resource to save the information.\r | |
421 | @retval RETURN_ACCESS_DENIED it is too late to invoke this interface\r | |
422 | @retval RETURN_NOT_STARTED it is too early to invoke this interface\r | |
423 | @retval RETURN_UNSUPPORTED the service is not supported by implementaion.\r | |
424 | **/\r | |
425 | RETURN_STATUS\r | |
426 | EFIAPI\r | |
427 | SaveLockBox (\r | |
428 | IN GUID *Guid,\r | |
429 | IN VOID *Buffer,\r | |
430 | IN UINTN Length\r | |
431 | )\r | |
432 | {\r | |
433 | ASSERT (FALSE);\r | |
434 | \r | |
435 | //\r | |
436 | // No support to save at PEI phase\r | |
437 | //\r | |
438 | return RETURN_UNSUPPORTED;\r | |
439 | }\r | |
440 | \r | |
441 | /**\r | |
442 | This function will set lockbox attributes.\r | |
443 | \r | |
444 | @param Guid the guid to identify the confidential information\r | |
445 | @param Attributes the attributes of the lockbox\r | |
446 | \r | |
447 | @retval RETURN_SUCCESS the information is saved successfully.\r | |
448 | @retval RETURN_INVALID_PARAMETER attributes is invalid.\r | |
449 | @retval RETURN_NOT_FOUND the requested GUID not found.\r | |
450 | @retval RETURN_ACCESS_DENIED it is too late to invoke this interface\r | |
451 | @retval RETURN_NOT_STARTED it is too early to invoke this interface\r | |
452 | @retval RETURN_UNSUPPORTED the service is not supported by implementaion.\r | |
453 | **/\r | |
454 | RETURN_STATUS\r | |
455 | EFIAPI\r | |
456 | SetLockBoxAttributes (\r | |
457 | IN GUID *Guid,\r | |
458 | IN UINT64 Attributes\r | |
459 | )\r | |
460 | {\r | |
461 | ASSERT (FALSE);\r | |
462 | \r | |
463 | //\r | |
464 | // No support to save at PEI phase\r | |
465 | //\r | |
466 | return RETURN_UNSUPPORTED;\r | |
467 | }\r | |
468 | \r | |
469 | /**\r | |
470 | This function will update confidential information to lockbox.\r | |
471 | \r | |
472 | @param Guid the guid to identify the original confidential information\r | |
473 | @param Offset the offset of the original confidential information\r | |
474 | @param Buffer the address of the updated confidential information\r | |
475 | @param Length the length of the updated confidential information\r | |
476 | \r | |
477 | @retval RETURN_SUCCESS the information is saved successfully.\r | |
478 | @retval RETURN_INVALID_PARAMETER the Guid is NULL, or Buffer is NULL, or Length is 0.\r | |
479 | @retval RETURN_NOT_FOUND the requested GUID not found.\r | |
480 | @retval RETURN_BUFFER_TOO_SMALL the original buffer to too small to hold new information.\r | |
481 | @retval RETURN_ACCESS_DENIED it is too late to invoke this interface\r | |
482 | @retval RETURN_NOT_STARTED it is too early to invoke this interface\r | |
483 | @retval RETURN_UNSUPPORTED the service is not supported by implementaion.\r | |
484 | **/\r | |
485 | RETURN_STATUS\r | |
486 | EFIAPI\r | |
487 | UpdateLockBox (\r | |
488 | IN GUID *Guid,\r | |
489 | IN UINTN Offset,\r | |
490 | IN VOID *Buffer,\r | |
491 | IN UINTN Length\r | |
492 | )\r | |
493 | {\r | |
494 | ASSERT (FALSE);\r | |
495 | \r | |
496 | //\r | |
497 | // No support to update at PEI phase\r | |
498 | //\r | |
499 | return RETURN_UNSUPPORTED;\r | |
500 | }\r | |
501 | \r | |
502 | /**\r | |
503 | This function will restore confidential information from lockbox.\r | |
504 | \r | |
505 | @param Guid the guid to identify the confidential information\r | |
506 | @param Buffer the address of the restored confidential information\r | |
507 | NULL means restored to original address, Length MUST be NULL at same time.\r | |
508 | @param Length the length of the restored confidential information\r | |
509 | \r | |
510 | @retval RETURN_SUCCESS the information is restored successfully.\r | |
511 | @retval RETURN_INVALID_PARAMETER the Guid is NULL, or one of Buffer and Length is NULL.\r | |
512 | @retval RETURN_WRITE_PROTECTED Buffer and Length are NULL, but the LockBox has no \r | |
513 | LOCK_BOX_ATTRIBUTE_RESTORE_IN_PLACE attribute.\r | |
514 | @retval RETURN_BUFFER_TOO_SMALL the Length is too small to hold the confidential information.\r | |
515 | @retval RETURN_NOT_FOUND the requested GUID not found.\r | |
516 | @retval RETURN_NOT_STARTED it is too early to invoke this interface\r | |
517 | @retval RETURN_ACCESS_DENIED not allow to restore to the address\r | |
518 | @retval RETURN_UNSUPPORTED the service is not supported by implementaion.\r | |
519 | **/\r | |
520 | RETURN_STATUS\r | |
521 | EFIAPI\r | |
522 | RestoreLockBox (\r | |
523 | IN GUID *Guid,\r | |
524 | IN VOID *Buffer, OPTIONAL\r | |
525 | IN OUT UINTN *Length OPTIONAL\r | |
526 | )\r | |
527 | {\r | |
528 | EFI_STATUS Status;\r | |
529 | EFI_PEI_SMM_COMMUNICATION_PPI *SmmCommunicationPpi;\r | |
530 | EFI_SMM_LOCK_BOX_PARAMETER_RESTORE *LockBoxParameterRestore;\r | |
531 | EFI_SMM_COMMUNICATE_HEADER *CommHeader;\r | |
532 | UINT8 CommBuffer[sizeof(EFI_GUID) + sizeof(UINT64) + sizeof(EFI_SMM_LOCK_BOX_PARAMETER_RESTORE)];\r | |
533 | UINTN CommSize;\r | |
534 | UINT64 MessageLength;\r | |
535 | \r | |
536 | //\r | |
537 | // Please aware that there is UINTN in EFI_SMM_COMMUNICATE_HEADER. It might be UINT64 in DXE, while it is UINT32 in PEI.\r | |
538 | // typedef struct {\r | |
539 | // EFI_GUID HeaderGuid;\r | |
540 | // UINTN MessageLength;\r | |
541 | // UINT8 Data[1];\r | |
542 | // } EFI_SMM_COMMUNICATE_HEADER;\r | |
543 | //\r | |
544 | \r | |
545 | DEBUG ((EFI_D_INFO, "SmmLockBoxPeiLib RestoreLockBox - Enter\n"));\r | |
546 | \r | |
547 | //\r | |
548 | // Basic check\r | |
549 | //\r | |
550 | if ((Guid == NULL) ||\r | |
551 | ((Buffer == NULL) && (Length != NULL)) ||\r | |
552 | ((Buffer != NULL) && (Length == NULL))) {\r | |
553 | return EFI_INVALID_PARAMETER;\r | |
554 | }\r | |
555 | \r | |
556 | //\r | |
557 | // Get needed resource\r | |
558 | //\r | |
559 | Status = PeiServicesLocatePpi (\r | |
560 | &gEfiPeiSmmCommunicationPpiGuid,\r | |
561 | 0,\r | |
562 | NULL,\r | |
563 | (VOID **)&SmmCommunicationPpi\r | |
564 | );\r | |
565 | if (EFI_ERROR (Status)) {\r | |
bd3afeb1 LE |
566 | DEBUG ((EFI_D_INFO, "SmmLockBoxPeiLib LocatePpi - (%r)\n", Status));\r |
567 | Status = InternalRestoreLockBoxFromSmram (Guid, Buffer, Length);\r | |
568 | DEBUG ((EFI_D_INFO, "SmmLockBoxPeiLib RestoreLockBox - Exit (%r)\n", Status));\r | |
569 | return Status;\r | |
993532d0 | 570 | }\r |
571 | \r | |
572 | //\r | |
573 | // Prepare parameter\r | |
574 | //\r | |
575 | CommHeader = (EFI_SMM_COMMUNICATE_HEADER *)&CommBuffer[0];\r | |
576 | CopyMem (&CommHeader->HeaderGuid, &gEfiSmmLockBoxCommunicationGuid, sizeof(gEfiSmmLockBoxCommunicationGuid));\r | |
577 | if ((sizeof(UINTN) == sizeof(UINT32)) && (FeaturePcdGet (PcdDxeIplSwitchToLongMode)) ) {\r | |
578 | MessageLength = sizeof(*LockBoxParameterRestore);\r | |
579 | CopyMem (&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, MessageLength)], &MessageLength, sizeof(MessageLength));\r | |
580 | } else {\r | |
581 | CommHeader->MessageLength = sizeof(*LockBoxParameterRestore);\r | |
582 | }\r | |
583 | \r | |
584 | DEBUG ((EFI_D_INFO, "SmmLockBoxPeiLib CommBuffer - %x\n", &CommBuffer[0]));\r | |
585 | if ((sizeof(UINTN) == sizeof(UINT32)) && (FeaturePcdGet (PcdDxeIplSwitchToLongMode)) ) {\r | |
586 | LockBoxParameterRestore = (EFI_SMM_LOCK_BOX_PARAMETER_RESTORE *)&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, MessageLength) + sizeof(UINT64)];\r | |
587 | } else {\r | |
588 | LockBoxParameterRestore = (EFI_SMM_LOCK_BOX_PARAMETER_RESTORE *)&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, MessageLength) + sizeof(UINTN)];\r | |
589 | }\r | |
590 | DEBUG ((EFI_D_INFO, "SmmLockBoxPeiLib LockBoxParameterRestore - %x\n", LockBoxParameterRestore));\r | |
591 | LockBoxParameterRestore->Header.Command = EFI_SMM_LOCK_BOX_COMMAND_RESTORE;\r | |
592 | LockBoxParameterRestore->Header.DataLength = sizeof(*LockBoxParameterRestore);\r | |
593 | LockBoxParameterRestore->Header.ReturnStatus = (UINT64)-1;\r | |
594 | if (Guid != 0) {\r | |
595 | CopyMem (&LockBoxParameterRestore->Guid, Guid, sizeof(*Guid));\r | |
596 | } else {\r | |
597 | ZeroMem (&LockBoxParameterRestore->Guid, sizeof(*Guid));\r | |
598 | }\r | |
599 | LockBoxParameterRestore->Buffer = (EFI_PHYSICAL_ADDRESS)(UINTN)Buffer;\r | |
600 | if (Length != NULL) {\r | |
601 | LockBoxParameterRestore->Length = (EFI_PHYSICAL_ADDRESS)*Length;\r | |
602 | } else {\r | |
603 | LockBoxParameterRestore->Length = 0;\r | |
604 | }\r | |
605 | \r | |
606 | //\r | |
607 | // Send command\r | |
608 | //\r | |
609 | CommSize = sizeof(CommBuffer);\r | |
610 | Status = SmmCommunicationPpi->Communicate (\r | |
611 | SmmCommunicationPpi,\r | |
612 | &CommBuffer[0],\r | |
613 | &CommSize\r | |
614 | );\r | |
615 | if (Status == EFI_NOT_STARTED) {\r | |
616 | //\r | |
617 | // Pei SMM communication not ready yet, so we access SMRAM directly\r | |
618 | //\r | |
619 | DEBUG ((EFI_D_INFO, "SmmLockBoxPeiLib Communicate - (%r)\n", Status));\r | |
620 | Status = InternalRestoreLockBoxFromSmram (Guid, Buffer, Length);\r | |
621 | LockBoxParameterRestore->Header.ReturnStatus = (UINT64)Status;\r | |
622 | if (Length != NULL) {\r | |
623 | LockBoxParameterRestore->Length = (UINT64)*Length;\r | |
624 | }\r | |
625 | }\r | |
626 | ASSERT_EFI_ERROR (Status);\r | |
627 | \r | |
628 | if (Length != NULL) {\r | |
629 | *Length = (UINTN)LockBoxParameterRestore->Length;\r | |
630 | }\r | |
631 | \r | |
632 | Status = (EFI_STATUS)LockBoxParameterRestore->Header.ReturnStatus;\r | |
633 | if (Status != EFI_SUCCESS) {\r | |
634 | // Need or MAX_BIT, because there might be case that SMM is X64 while PEI is IA32.\r | |
635 | Status |= MAX_BIT;\r | |
636 | }\r | |
637 | \r | |
638 | DEBUG ((EFI_D_INFO, "SmmLockBoxPeiLib RestoreLockBox - Exit (%r)\n", Status));\r | |
639 | \r | |
640 | //\r | |
641 | // Done\r | |
642 | //\r | |
643 | return Status;\r | |
644 | }\r | |
645 | \r | |
646 | /**\r | |
647 | This function will restore confidential information from all lockbox which have RestoreInPlace attribute.\r | |
648 | \r | |
649 | @retval RETURN_SUCCESS the information is restored successfully.\r | |
650 | @retval RETURN_NOT_STARTED it is too early to invoke this interface\r | |
651 | @retval RETURN_UNSUPPORTED the service is not supported by implementaion.\r | |
652 | **/\r | |
653 | RETURN_STATUS\r | |
654 | EFIAPI\r | |
655 | RestoreAllLockBoxInPlace (\r | |
656 | VOID\r | |
657 | )\r | |
658 | {\r | |
659 | EFI_STATUS Status;\r | |
660 | EFI_PEI_SMM_COMMUNICATION_PPI *SmmCommunicationPpi;\r | |
661 | EFI_SMM_LOCK_BOX_PARAMETER_RESTORE_ALL_IN_PLACE *LockBoxParameterRestoreAllInPlace;\r | |
662 | EFI_SMM_COMMUNICATE_HEADER *CommHeader;\r | |
663 | UINT8 CommBuffer[sizeof(EFI_GUID) + sizeof(UINT64) + sizeof(EFI_SMM_LOCK_BOX_PARAMETER_RESTORE_ALL_IN_PLACE)];\r | |
664 | UINTN CommSize;\r | |
665 | UINT64 MessageLength;\r | |
666 | \r | |
667 | //\r | |
668 | // Please aware that there is UINTN in EFI_SMM_COMMUNICATE_HEADER. It might be UINT64 in DXE, while it is UINT32 in PEI.\r | |
669 | // typedef struct {\r | |
670 | // EFI_GUID HeaderGuid;\r | |
671 | // UINTN MessageLength;\r | |
672 | // UINT8 Data[1];\r | |
673 | // } EFI_SMM_COMMUNICATE_HEADER;\r | |
674 | //\r | |
675 | \r | |
676 | DEBUG ((EFI_D_INFO, "SmmLockBoxPeiLib RestoreAllLockBoxInPlace - Enter\n"));\r | |
677 | \r | |
678 | //\r | |
679 | // Get needed resource\r | |
680 | //\r | |
681 | Status = PeiServicesLocatePpi (\r | |
682 | &gEfiPeiSmmCommunicationPpiGuid,\r | |
683 | 0,\r | |
684 | NULL,\r | |
685 | (VOID **)&SmmCommunicationPpi\r | |
686 | );\r | |
687 | if (EFI_ERROR (Status)) {\r | |
bd3afeb1 LE |
688 | DEBUG ((EFI_D_INFO, "SmmLockBoxPeiLib LocatePpi - (%r)\n", Status));\r |
689 | Status = InternalRestoreAllLockBoxInPlaceFromSmram ();\r | |
690 | DEBUG ((EFI_D_INFO, "SmmLockBoxPeiLib RestoreAllLockBoxInPlace - Exit (%r)\n", Status));\r | |
691 | return Status;\r | |
993532d0 | 692 | }\r |
693 | \r | |
694 | //\r | |
695 | // Prepare parameter\r | |
696 | //\r | |
697 | CommHeader = (EFI_SMM_COMMUNICATE_HEADER *)&CommBuffer[0];\r | |
698 | CopyMem (&CommHeader->HeaderGuid, &gEfiSmmLockBoxCommunicationGuid, sizeof(gEfiSmmLockBoxCommunicationGuid));\r | |
699 | if ((sizeof(UINTN) == sizeof(UINT32)) && (FeaturePcdGet (PcdDxeIplSwitchToLongMode)) ) {\r | |
700 | MessageLength = sizeof(*LockBoxParameterRestoreAllInPlace);\r | |
701 | CopyMem (&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, MessageLength)], &MessageLength, sizeof(MessageLength));\r | |
702 | } else {\r | |
703 | CommHeader->MessageLength = sizeof(*LockBoxParameterRestoreAllInPlace);\r | |
704 | }\r | |
705 | \r | |
706 | if ((sizeof(UINTN) == sizeof(UINT32)) && (FeaturePcdGet (PcdDxeIplSwitchToLongMode)) ) {\r | |
707 | LockBoxParameterRestoreAllInPlace = (EFI_SMM_LOCK_BOX_PARAMETER_RESTORE_ALL_IN_PLACE *)&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, MessageLength) + sizeof(UINT64)];\r | |
708 | } else {\r | |
709 | LockBoxParameterRestoreAllInPlace = (EFI_SMM_LOCK_BOX_PARAMETER_RESTORE_ALL_IN_PLACE *)&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, MessageLength) + sizeof(UINTN)];\r | |
710 | }\r | |
711 | LockBoxParameterRestoreAllInPlace->Header.Command = EFI_SMM_LOCK_BOX_COMMAND_RESTORE_ALL_IN_PLACE;\r | |
712 | LockBoxParameterRestoreAllInPlace->Header.DataLength = sizeof(*LockBoxParameterRestoreAllInPlace);\r | |
713 | LockBoxParameterRestoreAllInPlace->Header.ReturnStatus = (UINT64)-1;\r | |
714 | \r | |
715 | //\r | |
716 | // Send command\r | |
717 | //\r | |
718 | CommSize = sizeof(CommBuffer);\r | |
719 | Status = SmmCommunicationPpi->Communicate (\r | |
720 | SmmCommunicationPpi,\r | |
721 | &CommBuffer[0],\r | |
722 | &CommSize\r | |
723 | );\r | |
724 | if (Status == EFI_NOT_STARTED) {\r | |
725 | //\r | |
726 | // Pei SMM communication not ready yet, so we access SMRAM directly\r | |
727 | //\r | |
728 | DEBUG ((EFI_D_INFO, "SmmLockBoxPeiLib Communicate - (%r)\n", Status));\r | |
729 | Status = InternalRestoreAllLockBoxInPlaceFromSmram ();\r | |
730 | LockBoxParameterRestoreAllInPlace->Header.ReturnStatus = (UINT64)Status;\r | |
731 | }\r | |
732 | ASSERT_EFI_ERROR (Status);\r | |
733 | \r | |
734 | Status = (EFI_STATUS)LockBoxParameterRestoreAllInPlace->Header.ReturnStatus;\r | |
735 | if (Status != EFI_SUCCESS) {\r | |
736 | // Need or MAX_BIT, because there might be case that SMM is X64 while PEI is IA32.\r | |
737 | Status |= MAX_BIT;\r | |
738 | }\r | |
739 | \r | |
740 | DEBUG ((EFI_D_INFO, "SmmLockBoxPeiLib RestoreAllLockBoxInPlace - Exit (%r)\n", Status));\r | |
741 | \r | |
742 | //\r | |
743 | // Done\r | |
744 | //\r | |
745 | return Status;\r | |
746 | }\r | |
747 | \r |