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8a2d4996 | 1 | /** @file\r |
2 | \r | |
3 | The sample implementation for SMM variable protocol. And this driver \r | |
4 | implements an SMI handler to communicate with the DXE runtime driver \r | |
5 | to provide variable services.\r | |
6 | \r | |
2445a70e | 7 | Caution: This module requires additional review when modified.\r |
8 | This driver will have external input - variable data and communicate buffer in SMM mode.\r | |
9 | This external input must be validated carefully to avoid security issue like\r | |
10 | buffer overflow, integer overflow.\r | |
11 | \r | |
12 | SmmVariableHandler() will receive untrusted input and do basic validation.\r | |
13 | \r | |
14 | Each sub function VariableServiceGetVariable(), VariableServiceGetNextVariableName(), \r | |
15 | VariableServiceSetVariable(), VariableServiceQueryVariableInfo(), ReclaimForOS(), \r | |
16 | SmmVariableGetStatistics() should also do validation based on its own knowledge.\r | |
17 | \r | |
efb01a10 | 18 | Copyright (c) 2010 - 2015, Intel Corporation. All rights reserved.<BR>\r |
2445a70e | 19 | This program and the accompanying materials \r |
20 | are licensed and made available under the terms and conditions of the BSD License \r | |
21 | which accompanies this distribution. The full text of the license may be found at \r | |
22 | http://opensource.org/licenses/bsd-license.php\r | |
8a2d4996 | 23 | \r |
24 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
25 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
26 | \r | |
27 | **/\r | |
d00ed85e | 28 | #include <Protocol/SmmVariable.h>\r |
29 | #include <Protocol/SmmFirmwareVolumeBlock.h>\r | |
8a2d4996 | 30 | #include <Protocol/SmmFaultTolerantWrite.h>\r |
2445a70e | 31 | #include <Protocol/SmmAccess2.h>\r |
ff843847 | 32 | #include <Protocol/SmmEndOfDxe.h>\r |
efb01a10 | 33 | #include <Protocol/SmmVarCheck.h>\r |
2445a70e | 34 | \r |
8a2d4996 | 35 | #include <Library/SmmServicesTableLib.h>\r |
842b1242 | 36 | #include <Library/SmmMemLib.h>\r |
8a2d4996 | 37 | \r |
d00ed85e | 38 | #include <Guid/VariableFormat.h>\r |
39 | #include <Guid/SmmVariableCommon.h>\r | |
8a2d4996 | 40 | #include "Variable.h"\r |
8a2d4996 | 41 | \r |
d00ed85e | 42 | extern VARIABLE_INFO_ENTRY *gVariableInfo;\r |
8a2d4996 | 43 | EFI_HANDLE mSmmVariableHandle = NULL;\r |
44 | EFI_HANDLE mVariableHandle = NULL;\r | |
45 | BOOLEAN mAtRuntime = FALSE;\r | |
46 | EFI_GUID mZeroGuid = {0, 0, 0, {0, 0, 0, 0, 0, 0, 0, 0}};\r | |
5e5bb2a9 SZ |
47 | UINT8 *mVariableBufferPayload = NULL;\r |
48 | UINTN mVariableBufferPayloadSize;\r | |
ff843847 RN |
49 | extern BOOLEAN mEndOfDxe;\r |
50 | extern BOOLEAN mEnableLocking;\r | |
51 | \r | |
52 | /**\r | |
53 | \r | |
54 | This code sets variable in storage blocks (Volatile or Non-Volatile).\r | |
55 | \r | |
56 | @param VariableName Name of Variable to be found.\r | |
57 | @param VendorGuid Variable vendor GUID.\r | |
58 | @param Attributes Attribute value of the variable found\r | |
59 | @param DataSize Size of Data found. If size is less than the\r | |
60 | data, this value contains the required size.\r | |
61 | @param Data Data pointer.\r | |
62 | \r | |
63 | @return EFI_INVALID_PARAMETER Invalid parameter.\r | |
64 | @return EFI_SUCCESS Set successfully.\r | |
65 | @return EFI_OUT_OF_RESOURCES Resource not enough to set variable.\r | |
66 | @return EFI_NOT_FOUND Not found.\r | |
67 | @return EFI_WRITE_PROTECTED Variable is read-only.\r | |
68 | \r | |
69 | **/\r | |
70 | EFI_STATUS\r | |
71 | EFIAPI\r | |
72 | SmmVariableSetVariable (\r | |
73 | IN CHAR16 *VariableName,\r | |
74 | IN EFI_GUID *VendorGuid,\r | |
75 | IN UINT32 Attributes,\r | |
76 | IN UINTN DataSize,\r | |
77 | IN VOID *Data\r | |
78 | )\r | |
79 | {\r | |
80 | EFI_STATUS Status;\r | |
81 | \r | |
82 | //\r | |
83 | // Disable write protection when the calling SetVariable() through EFI_SMM_VARIABLE_PROTOCOL.\r | |
84 | //\r | |
85 | mEnableLocking = FALSE;\r | |
86 | Status = VariableServiceSetVariable (\r | |
87 | VariableName,\r | |
88 | VendorGuid,\r | |
89 | Attributes,\r | |
90 | DataSize,\r | |
91 | Data\r | |
92 | );\r | |
93 | mEnableLocking = TRUE;\r | |
94 | return Status;\r | |
95 | }\r | |
5e5bb2a9 | 96 | \r |
8a2d4996 | 97 | EFI_SMM_VARIABLE_PROTOCOL gSmmVariable = {\r |
98 | VariableServiceGetVariable,\r | |
99 | VariableServiceGetNextVariableName,\r | |
ff843847 | 100 | SmmVariableSetVariable,\r |
8a2d4996 | 101 | VariableServiceQueryVariableInfo\r |
102 | };\r | |
103 | \r | |
efb01a10 SZ |
104 | EDKII_SMM_VAR_CHECK_PROTOCOL mSmmVarCheck = { VarCheckRegisterSetVariableCheckHandler,\r |
105 | VarCheckVariablePropertySet,\r | |
106 | VarCheckVariablePropertyGet };\r | |
107 | \r | |
8a2d4996 | 108 | /**\r |
109 | Return TRUE if ExitBootServices () has been called.\r | |
110 | \r | |
111 | @retval TRUE If ExitBootServices () has been called.\r | |
112 | **/\r | |
113 | BOOLEAN\r | |
114 | AtRuntime (\r | |
115 | VOID\r | |
116 | )\r | |
117 | {\r | |
118 | return mAtRuntime;\r | |
119 | }\r | |
120 | \r | |
121 | /**\r | |
122 | Initializes a basic mutual exclusion lock.\r | |
123 | \r | |
124 | This function initializes a basic mutual exclusion lock to the released state \r | |
125 | and returns the lock. Each lock provides mutual exclusion access at its task \r | |
126 | priority level. Since there is no preemption or multiprocessor support in EFI,\r | |
127 | acquiring the lock only consists of raising to the locks TPL.\r | |
128 | If Lock is NULL, then ASSERT().\r | |
129 | If Priority is not a valid TPL value, then ASSERT().\r | |
130 | \r | |
131 | @param Lock A pointer to the lock data structure to initialize.\r | |
132 | @param Priority EFI TPL is associated with the lock.\r | |
133 | \r | |
134 | @return The lock.\r | |
135 | \r | |
136 | **/\r | |
137 | EFI_LOCK *\r | |
138 | InitializeLock (\r | |
139 | IN OUT EFI_LOCK *Lock,\r | |
140 | IN EFI_TPL Priority\r | |
141 | )\r | |
142 | {\r | |
143 | return Lock;\r | |
144 | }\r | |
145 | \r | |
146 | /**\r | |
147 | Acquires lock only at boot time. Simply returns at runtime.\r | |
148 | \r | |
149 | This is a temperary function that will be removed when\r | |
150 | EfiAcquireLock() in UefiLib can handle the call in UEFI\r | |
151 | Runtimer driver in RT phase.\r | |
152 | It calls EfiAcquireLock() at boot time, and simply returns\r | |
153 | at runtime.\r | |
154 | \r | |
155 | @param Lock A pointer to the lock to acquire.\r | |
156 | \r | |
157 | **/\r | |
158 | VOID\r | |
159 | AcquireLockOnlyAtBootTime (\r | |
160 | IN EFI_LOCK *Lock\r | |
161 | )\r | |
162 | {\r | |
163 | \r | |
164 | }\r | |
165 | \r | |
166 | \r | |
167 | /**\r | |
168 | Releases lock only at boot time. Simply returns at runtime.\r | |
169 | \r | |
170 | This is a temperary function which will be removed when\r | |
171 | EfiReleaseLock() in UefiLib can handle the call in UEFI\r | |
172 | Runtimer driver in RT phase.\r | |
173 | It calls EfiReleaseLock() at boot time and simply returns\r | |
174 | at runtime.\r | |
175 | \r | |
176 | @param Lock A pointer to the lock to release.\r | |
177 | \r | |
178 | **/\r | |
179 | VOID\r | |
180 | ReleaseLockOnlyAtBootTime (\r | |
181 | IN EFI_LOCK *Lock\r | |
182 | )\r | |
183 | {\r | |
184 | \r | |
185 | }\r | |
186 | \r | |
187 | /**\r | |
188 | Retrive the SMM Fault Tolerent Write protocol interface.\r | |
189 | \r | |
190 | @param[out] FtwProtocol The interface of SMM Ftw protocol\r | |
191 | \r | |
192 | @retval EFI_SUCCESS The SMM FTW protocol instance was found and returned in FtwProtocol.\r | |
193 | @retval EFI_NOT_FOUND The SMM FTW protocol instance was not found.\r | |
194 | @retval EFI_INVALID_PARAMETER SarProtocol is NULL.\r | |
195 | \r | |
196 | **/\r | |
197 | EFI_STATUS\r | |
198 | GetFtwProtocol (\r | |
199 | OUT VOID **FtwProtocol\r | |
200 | )\r | |
201 | {\r | |
202 | EFI_STATUS Status;\r | |
203 | \r | |
204 | //\r | |
205 | // Locate Smm Fault Tolerent Write protocol\r | |
206 | //\r | |
207 | Status = gSmst->SmmLocateProtocol (\r | |
208 | &gEfiSmmFaultTolerantWriteProtocolGuid, \r | |
209 | NULL, \r | |
210 | FtwProtocol\r | |
211 | );\r | |
212 | return Status;\r | |
213 | }\r | |
214 | \r | |
215 | \r | |
216 | /**\r | |
217 | Retrive the SMM FVB protocol interface by HANDLE.\r | |
218 | \r | |
219 | @param[in] FvBlockHandle The handle of SMM FVB protocol that provides services for\r | |
220 | reading, writing, and erasing the target block.\r | |
221 | @param[out] FvBlock The interface of SMM FVB protocol\r | |
222 | \r | |
223 | @retval EFI_SUCCESS The interface information for the specified protocol was returned.\r | |
224 | @retval EFI_UNSUPPORTED The device does not support the SMM FVB protocol.\r | |
225 | @retval EFI_INVALID_PARAMETER FvBlockHandle is not a valid EFI_HANDLE or FvBlock is NULL.\r | |
226 | \r | |
227 | **/\r | |
228 | EFI_STATUS\r | |
229 | GetFvbByHandle (\r | |
230 | IN EFI_HANDLE FvBlockHandle,\r | |
231 | OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvBlock\r | |
232 | )\r | |
233 | {\r | |
234 | //\r | |
235 | // To get the SMM FVB protocol interface on the handle\r | |
236 | //\r | |
237 | return gSmst->SmmHandleProtocol (\r | |
238 | FvBlockHandle,\r | |
239 | &gEfiSmmFirmwareVolumeBlockProtocolGuid,\r | |
240 | (VOID **) FvBlock\r | |
241 | );\r | |
242 | }\r | |
243 | \r | |
244 | \r | |
245 | /**\r | |
246 | Function returns an array of handles that support the SMM FVB protocol\r | |
247 | in a buffer allocated from pool. \r | |
248 | \r | |
249 | @param[out] NumberHandles The number of handles returned in Buffer.\r | |
250 | @param[out] Buffer A pointer to the buffer to return the requested\r | |
251 | array of handles that support SMM FVB protocol.\r | |
252 | \r | |
253 | @retval EFI_SUCCESS The array of handles was returned in Buffer, and the number of\r | |
254 | handles in Buffer was returned in NumberHandles.\r | |
255 | @retval EFI_NOT_FOUND No SMM FVB handle was found.\r | |
256 | @retval EFI_OUT_OF_RESOURCES There is not enough pool memory to store the matching results.\r | |
257 | @retval EFI_INVALID_PARAMETER NumberHandles is NULL or Buffer is NULL.\r | |
258 | \r | |
259 | **/\r | |
260 | EFI_STATUS\r | |
261 | GetFvbCountAndBuffer (\r | |
262 | OUT UINTN *NumberHandles,\r | |
263 | OUT EFI_HANDLE **Buffer\r | |
264 | )\r | |
265 | {\r | |
266 | EFI_STATUS Status;\r | |
267 | UINTN BufferSize;\r | |
268 | \r | |
269 | if ((NumberHandles == NULL) || (Buffer == NULL)) {\r | |
270 | return EFI_INVALID_PARAMETER;\r | |
271 | }\r | |
272 | \r | |
273 | BufferSize = 0;\r | |
274 | *NumberHandles = 0;\r | |
275 | *Buffer = NULL;\r | |
276 | Status = gSmst->SmmLocateHandle (\r | |
277 | ByProtocol,\r | |
278 | &gEfiSmmFirmwareVolumeBlockProtocolGuid,\r | |
279 | NULL,\r | |
280 | &BufferSize,\r | |
281 | *Buffer\r | |
282 | );\r | |
283 | if (EFI_ERROR(Status) && Status != EFI_BUFFER_TOO_SMALL) {\r | |
284 | return EFI_NOT_FOUND;\r | |
285 | }\r | |
286 | \r | |
287 | *Buffer = AllocatePool (BufferSize);\r | |
288 | if (*Buffer == NULL) {\r | |
289 | return EFI_OUT_OF_RESOURCES;\r | |
290 | }\r | |
291 | \r | |
292 | Status = gSmst->SmmLocateHandle (\r | |
293 | ByProtocol,\r | |
294 | &gEfiSmmFirmwareVolumeBlockProtocolGuid,\r | |
295 | NULL,\r | |
296 | &BufferSize,\r | |
297 | *Buffer\r | |
298 | );\r | |
299 | \r | |
300 | *NumberHandles = BufferSize / sizeof(EFI_HANDLE);\r | |
301 | if (EFI_ERROR(Status)) {\r | |
302 | *NumberHandles = 0;\r | |
5e5bb2a9 SZ |
303 | FreePool (*Buffer);\r |
304 | *Buffer = NULL;\r | |
8a2d4996 | 305 | }\r |
306 | \r | |
307 | return Status;\r | |
308 | }\r | |
309 | \r | |
310 | \r | |
311 | /**\r | |
312 | Get the variable statistics information from the information buffer pointed by gVariableInfo.\r | |
313 | \r | |
2445a70e | 314 | Caution: This function may be invoked at SMM runtime.\r |
315 | InfoEntry and InfoSize are external input. Care must be taken to make sure not security issue at runtime.\r | |
316 | \r | |
317 | @param[in, out] InfoEntry A pointer to the buffer of variable information entry.\r | |
318 | On input, point to the variable information returned last time. if \r | |
319 | InfoEntry->VendorGuid is zero, return the first information.\r | |
320 | On output, point to the next variable information.\r | |
321 | @param[in, out] InfoSize On input, the size of the variable information buffer.\r | |
322 | On output, the returned variable information size.\r | |
8a2d4996 | 323 | \r |
324 | @retval EFI_SUCCESS The variable information is found and returned successfully.\r | |
325 | @retval EFI_UNSUPPORTED No variable inoformation exists in variable driver. The \r | |
326 | PcdVariableCollectStatistics should be set TRUE to support it.\r | |
327 | @retval EFI_BUFFER_TOO_SMALL The buffer is too small to hold the next variable information.\r | |
328 | \r | |
329 | **/\r | |
330 | EFI_STATUS\r | |
331 | SmmVariableGetStatistics (\r | |
d00ed85e | 332 | IN OUT VARIABLE_INFO_ENTRY *InfoEntry,\r |
8a2d4996 | 333 | IN OUT UINTN *InfoSize\r |
334 | )\r | |
335 | {\r | |
d00ed85e | 336 | VARIABLE_INFO_ENTRY *VariableInfo;\r |
8a2d4996 | 337 | UINTN NameLength;\r |
338 | UINTN StatisticsInfoSize;\r | |
339 | CHAR16 *InfoName;\r | |
5e5bb2a9 SZ |
340 | EFI_GUID VendorGuid;\r |
341 | \r | |
8a2d4996 | 342 | ASSERT (InfoEntry != NULL);\r |
343 | VariableInfo = gVariableInfo; \r | |
344 | if (VariableInfo == NULL) {\r | |
345 | return EFI_UNSUPPORTED;\r | |
346 | }\r | |
347 | \r | |
d00ed85e | 348 | StatisticsInfoSize = sizeof (VARIABLE_INFO_ENTRY) + StrSize (VariableInfo->Name);\r |
eb96e4f2 | 349 | if (*InfoSize < StatisticsInfoSize) {\r |
8a2d4996 | 350 | *InfoSize = StatisticsInfoSize;\r |
351 | return EFI_BUFFER_TOO_SMALL;\r | |
352 | }\r | |
353 | InfoName = (CHAR16 *)(InfoEntry + 1);\r | |
354 | \r | |
5e5bb2a9 SZ |
355 | CopyGuid (&VendorGuid, &InfoEntry->VendorGuid);\r |
356 | \r | |
357 | if (CompareGuid (&VendorGuid, &mZeroGuid)) {\r | |
8a2d4996 | 358 | //\r |
359 | // Return the first variable info\r | |
360 | //\r | |
d00ed85e | 361 | CopyMem (InfoEntry, VariableInfo, sizeof (VARIABLE_INFO_ENTRY));\r |
8a2d4996 | 362 | CopyMem (InfoName, VariableInfo->Name, StrSize (VariableInfo->Name));\r |
363 | *InfoSize = StatisticsInfoSize;\r | |
364 | return EFI_SUCCESS;\r | |
365 | }\r | |
366 | \r | |
367 | //\r | |
368 | // Get the next variable info\r | |
369 | //\r | |
370 | while (VariableInfo != NULL) {\r | |
5e5bb2a9 | 371 | if (CompareGuid (&VariableInfo->VendorGuid, &VendorGuid)) {\r |
8a2d4996 | 372 | NameLength = StrSize (VariableInfo->Name);\r |
373 | if (NameLength == StrSize (InfoName)) {\r | |
374 | if (CompareMem (VariableInfo->Name, InfoName, NameLength) == 0) {\r | |
375 | //\r | |
376 | // Find the match one\r | |
377 | //\r | |
378 | VariableInfo = VariableInfo->Next;\r | |
379 | break;\r | |
380 | }\r | |
381 | }\r | |
382 | }\r | |
383 | VariableInfo = VariableInfo->Next;\r | |
384 | };\r | |
385 | \r | |
386 | if (VariableInfo == NULL) {\r | |
387 | *InfoSize = 0;\r | |
388 | return EFI_SUCCESS;\r | |
389 | }\r | |
390 | \r | |
391 | //\r | |
392 | // Output the new variable info\r | |
393 | //\r | |
d00ed85e | 394 | StatisticsInfoSize = sizeof (VARIABLE_INFO_ENTRY) + StrSize (VariableInfo->Name);\r |
8a2d4996 | 395 | if (*InfoSize < StatisticsInfoSize) {\r |
396 | *InfoSize = StatisticsInfoSize;\r | |
397 | return EFI_BUFFER_TOO_SMALL;\r | |
398 | }\r | |
399 | \r | |
d00ed85e | 400 | CopyMem (InfoEntry, VariableInfo, sizeof (VARIABLE_INFO_ENTRY));\r |
8a2d4996 | 401 | CopyMem (InfoName, VariableInfo->Name, StrSize (VariableInfo->Name));\r |
402 | *InfoSize = StatisticsInfoSize;\r | |
403 | \r | |
404 | return EFI_SUCCESS;\r | |
405 | }\r | |
406 | \r | |
407 | \r | |
408 | /**\r | |
409 | Communication service SMI Handler entry.\r | |
410 | \r | |
411 | This SMI handler provides services for the variable wrapper driver.\r | |
412 | \r | |
2445a70e | 413 | Caution: This function may receive untrusted input.\r |
414 | This variable data and communicate buffer are external input, so this function will do basic validation.\r | |
415 | Each sub function VariableServiceGetVariable(), VariableServiceGetNextVariableName(), \r | |
416 | VariableServiceSetVariable(), VariableServiceQueryVariableInfo(), ReclaimForOS(), \r | |
417 | SmmVariableGetStatistics() should also do validation based on its own knowledge.\r | |
418 | \r | |
8a2d4996 | 419 | @param[in] DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r |
420 | @param[in] RegisterContext Points to an optional handler context which was specified when the\r | |
421 | handler was registered.\r | |
422 | @param[in, out] CommBuffer A pointer to a collection of data in memory that will\r | |
423 | be conveyed from a non-SMM environment into an SMM environment.\r | |
424 | @param[in, out] CommBufferSize The size of the CommBuffer.\r | |
425 | \r | |
426 | @retval EFI_SUCCESS The interrupt was handled and quiesced. No other handlers \r | |
427 | should still be called.\r | |
428 | @retval EFI_WARN_INTERRUPT_SOURCE_QUIESCED The interrupt has been quiesced but other handlers should \r | |
429 | still be called.\r | |
430 | @retval EFI_WARN_INTERRUPT_SOURCE_PENDING The interrupt is still pending and other handlers should still \r | |
431 | be called.\r | |
432 | @retval EFI_INTERRUPT_PENDING The interrupt could not be quiesced.\r | |
433 | **/\r | |
434 | EFI_STATUS\r | |
435 | EFIAPI\r | |
436 | SmmVariableHandler (\r | |
437 | IN EFI_HANDLE DispatchHandle,\r | |
438 | IN CONST VOID *RegisterContext,\r | |
439 | IN OUT VOID *CommBuffer,\r | |
440 | IN OUT UINTN *CommBufferSize\r | |
441 | )\r | |
442 | {\r | |
443 | EFI_STATUS Status;\r | |
444 | SMM_VARIABLE_COMMUNICATE_HEADER *SmmVariableFunctionHeader;\r | |
445 | SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE *SmmVariableHeader;\r | |
446 | SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME *GetNextVariableName;\r | |
447 | SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO *QueryVariableInfo;\r | |
d00ed85e | 448 | VARIABLE_INFO_ENTRY *VariableInfo;\r |
ff843847 | 449 | SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE *VariableToLock;\r |
efb01a10 | 450 | SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY *CommVariableProperty;\r |
8a2d4996 | 451 | UINTN InfoSize;\r |
9d00d20e | 452 | UINTN NameBufferSize;\r |
5e5bb2a9 | 453 | UINTN CommBufferPayloadSize;\r |
164a9b67 | 454 | UINTN TempCommBufferSize;\r |
8a2d4996 | 455 | \r |
2445a70e | 456 | //\r |
457 | // If input is invalid, stop processing this SMI\r | |
458 | //\r | |
459 | if (CommBuffer == NULL || CommBufferSize == NULL) {\r | |
460 | return EFI_SUCCESS;\r | |
461 | }\r | |
462 | \r | |
164a9b67 SZ |
463 | TempCommBufferSize = *CommBufferSize;\r |
464 | \r | |
465 | if (TempCommBufferSize < SMM_VARIABLE_COMMUNICATE_HEADER_SIZE) {\r | |
5e5bb2a9 SZ |
466 | DEBUG ((EFI_D_ERROR, "SmmVariableHandler: SMM communication buffer size invalid!\n"));\r |
467 | return EFI_SUCCESS;\r | |
468 | }\r | |
164a9b67 | 469 | CommBufferPayloadSize = TempCommBufferSize - SMM_VARIABLE_COMMUNICATE_HEADER_SIZE;\r |
5e5bb2a9 SZ |
470 | if (CommBufferPayloadSize > mVariableBufferPayloadSize) {\r |
471 | DEBUG ((EFI_D_ERROR, "SmmVariableHandler: SMM communication buffer payload size invalid!\n"));\r | |
2445a70e | 472 | return EFI_SUCCESS;\r |
473 | }\r | |
474 | \r | |
842b1242 | 475 | if (!SmmIsBufferOutsideSmmValid ((UINTN)CommBuffer, TempCommBufferSize)) {\r |
5e5bb2a9 | 476 | DEBUG ((EFI_D_ERROR, "SmmVariableHandler: SMM communication buffer in SMRAM or overflow!\n"));\r |
2445a70e | 477 | return EFI_SUCCESS;\r |
478 | }\r | |
8a2d4996 | 479 | \r |
480 | SmmVariableFunctionHeader = (SMM_VARIABLE_COMMUNICATE_HEADER *)CommBuffer;\r | |
481 | switch (SmmVariableFunctionHeader->Function) {\r | |
482 | case SMM_VARIABLE_FUNCTION_GET_VARIABLE:\r | |
5e5bb2a9 SZ |
483 | if (CommBufferPayloadSize < OFFSET_OF(SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name)) {\r |
484 | DEBUG ((EFI_D_ERROR, "GetVariable: SMM communication buffer size invalid!\n"));\r | |
485 | return EFI_SUCCESS;\r | |
486 | }\r | |
487 | //\r | |
488 | // Copy the input communicate buffer payload to pre-allocated SMM variable buffer payload.\r | |
489 | //\r | |
490 | CopyMem (mVariableBufferPayload, SmmVariableFunctionHeader->Data, CommBufferPayloadSize);\r | |
491 | SmmVariableHeader = (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE *) mVariableBufferPayload;\r | |
9d00d20e SZ |
492 | if (((UINTN)(~0) - SmmVariableHeader->DataSize < OFFSET_OF(SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name)) ||\r |
493 | ((UINTN)(~0) - SmmVariableHeader->NameSize < OFFSET_OF(SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) + SmmVariableHeader->DataSize)) {\r | |
494 | //\r | |
495 | // Prevent InfoSize overflow happen\r | |
496 | //\r | |
497 | Status = EFI_ACCESS_DENIED;\r | |
498 | goto EXIT;\r | |
499 | }\r | |
2445a70e | 500 | InfoSize = OFFSET_OF(SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) \r |
501 | + SmmVariableHeader->DataSize + SmmVariableHeader->NameSize;\r | |
502 | \r | |
503 | //\r | |
504 | // SMRAM range check already covered before\r | |
505 | //\r | |
5e5bb2a9 SZ |
506 | if (InfoSize > CommBufferPayloadSize) {\r |
507 | DEBUG ((EFI_D_ERROR, "GetVariable: Data size exceed communication buffer size limit!\n"));\r | |
2445a70e | 508 | Status = EFI_ACCESS_DENIED;\r |
509 | goto EXIT;\r | |
510 | }\r | |
511 | \r | |
9d00d20e SZ |
512 | if (SmmVariableHeader->NameSize < sizeof (CHAR16) || SmmVariableHeader->Name[SmmVariableHeader->NameSize/sizeof (CHAR16) - 1] != L'\0') {\r |
513 | //\r | |
514 | // Make sure VariableName is A Null-terminated string.\r | |
515 | //\r | |
516 | Status = EFI_ACCESS_DENIED;\r | |
517 | goto EXIT;\r | |
518 | }\r | |
519 | \r | |
8a2d4996 | 520 | Status = VariableServiceGetVariable (\r |
521 | SmmVariableHeader->Name,\r | |
522 | &SmmVariableHeader->Guid,\r | |
523 | &SmmVariableHeader->Attributes,\r | |
524 | &SmmVariableHeader->DataSize,\r | |
525 | (UINT8 *)SmmVariableHeader->Name + SmmVariableHeader->NameSize\r | |
526 | );\r | |
5e5bb2a9 | 527 | CopyMem (SmmVariableFunctionHeader->Data, mVariableBufferPayload, CommBufferPayloadSize);\r |
8a2d4996 | 528 | break;\r |
529 | \r | |
530 | case SMM_VARIABLE_FUNCTION_GET_NEXT_VARIABLE_NAME:\r | |
5e5bb2a9 SZ |
531 | if (CommBufferPayloadSize < OFFSET_OF(SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name)) {\r |
532 | DEBUG ((EFI_D_ERROR, "GetNextVariableName: SMM communication buffer size invalid!\n"));\r | |
533 | return EFI_SUCCESS;\r | |
534 | }\r | |
535 | //\r | |
536 | // Copy the input communicate buffer payload to pre-allocated SMM variable buffer payload.\r | |
537 | //\r | |
538 | CopyMem (mVariableBufferPayload, SmmVariableFunctionHeader->Data, CommBufferPayloadSize);\r | |
539 | GetNextVariableName = (SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME *) mVariableBufferPayload;\r | |
9d00d20e SZ |
540 | if ((UINTN)(~0) - GetNextVariableName->NameSize < OFFSET_OF(SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name)) {\r |
541 | //\r | |
542 | // Prevent InfoSize overflow happen\r | |
543 | //\r | |
544 | Status = EFI_ACCESS_DENIED;\r | |
545 | goto EXIT;\r | |
546 | }\r | |
2445a70e | 547 | InfoSize = OFFSET_OF(SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name) + GetNextVariableName->NameSize;\r |
548 | \r | |
549 | //\r | |
550 | // SMRAM range check already covered before\r | |
551 | //\r | |
5e5bb2a9 SZ |
552 | if (InfoSize > CommBufferPayloadSize) {\r |
553 | DEBUG ((EFI_D_ERROR, "GetNextVariableName: Data size exceed communication buffer size limit!\n"));\r | |
2445a70e | 554 | Status = EFI_ACCESS_DENIED;\r |
555 | goto EXIT;\r | |
556 | }\r | |
557 | \r | |
5e5bb2a9 | 558 | NameBufferSize = CommBufferPayloadSize - OFFSET_OF(SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name);\r |
9d00d20e SZ |
559 | if (NameBufferSize < sizeof (CHAR16) || GetNextVariableName->Name[NameBufferSize/sizeof (CHAR16) - 1] != L'\0') {\r |
560 | //\r | |
561 | // Make sure input VariableName is A Null-terminated string.\r | |
562 | //\r | |
563 | Status = EFI_ACCESS_DENIED;\r | |
564 | goto EXIT;\r | |
565 | }\r | |
566 | \r | |
8a2d4996 | 567 | Status = VariableServiceGetNextVariableName (\r |
568 | &GetNextVariableName->NameSize,\r | |
569 | GetNextVariableName->Name,\r | |
570 | &GetNextVariableName->Guid\r | |
571 | );\r | |
5e5bb2a9 | 572 | CopyMem (SmmVariableFunctionHeader->Data, mVariableBufferPayload, CommBufferPayloadSize);\r |
8a2d4996 | 573 | break;\r |
574 | \r | |
575 | case SMM_VARIABLE_FUNCTION_SET_VARIABLE:\r | |
5e5bb2a9 SZ |
576 | if (CommBufferPayloadSize < OFFSET_OF(SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name)) {\r |
577 | DEBUG ((EFI_D_ERROR, "SetVariable: SMM communication buffer size invalid!\n"));\r | |
578 | return EFI_SUCCESS;\r | |
579 | }\r | |
580 | //\r | |
581 | // Copy the input communicate buffer payload to pre-allocated SMM variable buffer payload.\r | |
582 | //\r | |
583 | CopyMem (mVariableBufferPayload, SmmVariableFunctionHeader->Data, CommBufferPayloadSize);\r | |
584 | SmmVariableHeader = (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE *) mVariableBufferPayload;\r | |
9d00d20e SZ |
585 | if (((UINTN)(~0) - SmmVariableHeader->DataSize < OFFSET_OF(SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name)) ||\r |
586 | ((UINTN)(~0) - SmmVariableHeader->NameSize < OFFSET_OF(SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) + SmmVariableHeader->DataSize)) {\r | |
587 | //\r | |
588 | // Prevent InfoSize overflow happen\r | |
589 | //\r | |
590 | Status = EFI_ACCESS_DENIED;\r | |
591 | goto EXIT;\r | |
592 | }\r | |
d17c4eac | 593 | InfoSize = OFFSET_OF(SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name)\r |
594 | + SmmVariableHeader->DataSize + SmmVariableHeader->NameSize;\r | |
595 | \r | |
596 | //\r | |
597 | // SMRAM range check already covered before\r | |
598 | // Data buffer should not contain SMM range\r | |
599 | //\r | |
5e5bb2a9 SZ |
600 | if (InfoSize > CommBufferPayloadSize) {\r |
601 | DEBUG ((EFI_D_ERROR, "SetVariable: Data size exceed communication buffer size limit!\n"));\r | |
d17c4eac | 602 | Status = EFI_ACCESS_DENIED;\r |
603 | goto EXIT;\r | |
604 | }\r | |
605 | \r | |
9d00d20e SZ |
606 | if (SmmVariableHeader->NameSize < sizeof (CHAR16) || SmmVariableHeader->Name[SmmVariableHeader->NameSize/sizeof (CHAR16) - 1] != L'\0') {\r |
607 | //\r | |
608 | // Make sure VariableName is A Null-terminated string.\r | |
609 | //\r | |
610 | Status = EFI_ACCESS_DENIED;\r | |
611 | goto EXIT;\r | |
612 | }\r | |
613 | \r | |
8a2d4996 | 614 | Status = VariableServiceSetVariable (\r |
615 | SmmVariableHeader->Name,\r | |
616 | &SmmVariableHeader->Guid,\r | |
617 | SmmVariableHeader->Attributes,\r | |
618 | SmmVariableHeader->DataSize,\r | |
619 | (UINT8 *)SmmVariableHeader->Name + SmmVariableHeader->NameSize\r | |
620 | );\r | |
621 | break;\r | |
622 | \r | |
623 | case SMM_VARIABLE_FUNCTION_QUERY_VARIABLE_INFO:\r | |
5e5bb2a9 SZ |
624 | if (CommBufferPayloadSize < sizeof (SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO)) {\r |
625 | DEBUG ((EFI_D_ERROR, "QueryVariableInfo: SMM communication buffer size invalid!\n"));\r | |
626 | return EFI_SUCCESS;\r | |
2445a70e | 627 | }\r |
5e5bb2a9 | 628 | QueryVariableInfo = (SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO *) SmmVariableFunctionHeader->Data;\r |
2445a70e | 629 | \r |
8a2d4996 | 630 | Status = VariableServiceQueryVariableInfo (\r |
631 | QueryVariableInfo->Attributes,\r | |
632 | &QueryVariableInfo->MaximumVariableStorageSize,\r | |
633 | &QueryVariableInfo->RemainingVariableStorageSize,\r | |
634 | &QueryVariableInfo->MaximumVariableSize\r | |
635 | );\r | |
636 | break;\r | |
637 | \r | |
638 | case SMM_VARIABLE_FUNCTION_READY_TO_BOOT:\r | |
ff843847 | 639 | mEndOfDxe = TRUE;\r |
4edb1866 SZ |
640 | //\r |
641 | // The initialization for variable quota.\r | |
642 | //\r | |
643 | InitializeVariableQuota ();\r | |
876ac395 | 644 | if (AtRuntime()) {\r |
645 | Status = EFI_UNSUPPORTED;\r | |
646 | break;\r | |
647 | }\r | |
8a2d4996 | 648 | ReclaimForOS ();\r |
649 | Status = EFI_SUCCESS;\r | |
650 | break;\r | |
651 | \r | |
652 | case SMM_VARIABLE_FUNCTION_EXIT_BOOT_SERVICE:\r | |
653 | mAtRuntime = TRUE;\r | |
654 | Status = EFI_SUCCESS;\r | |
655 | break;\r | |
656 | \r | |
657 | case SMM_VARIABLE_FUNCTION_GET_STATISTICS:\r | |
d00ed85e | 658 | VariableInfo = (VARIABLE_INFO_ENTRY *) SmmVariableFunctionHeader->Data;\r |
164a9b67 | 659 | InfoSize = TempCommBufferSize - SMM_VARIABLE_COMMUNICATE_HEADER_SIZE;\r |
2445a70e | 660 | \r |
661 | //\r | |
662 | // Do not need to check SmmVariableFunctionHeader->Data in SMRAM here. \r | |
663 | // It is covered by previous CommBuffer check \r | |
664 | //\r | |
665 | \r | |
842b1242 | 666 | if (!SmmIsBufferOutsideSmmValid ((EFI_PHYSICAL_ADDRESS)(UINTN)CommBufferSize, sizeof(UINTN))) {\r |
5e5bb2a9 | 667 | DEBUG ((EFI_D_ERROR, "GetStatistics: SMM communication buffer in SMRAM!\n"));\r |
2445a70e | 668 | Status = EFI_ACCESS_DENIED;\r |
669 | goto EXIT;\r | |
670 | } \r | |
671 | \r | |
8a2d4996 | 672 | Status = SmmVariableGetStatistics (VariableInfo, &InfoSize);\r |
3f5c168f | 673 | *CommBufferSize = InfoSize + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE;\r |
8a2d4996 | 674 | break;\r |
675 | \r | |
ff843847 | 676 | case SMM_VARIABLE_FUNCTION_LOCK_VARIABLE:\r |
51547bb8 | 677 | if (mEndOfDxe) {\r |
ff843847 | 678 | Status = EFI_ACCESS_DENIED;\r |
51547bb8 RN |
679 | } else {\r |
680 | VariableToLock = (SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE *) SmmVariableFunctionHeader->Data;\r | |
681 | Status = VariableLockRequestToLock (\r | |
682 | NULL,\r | |
683 | VariableToLock->Name,\r | |
684 | &VariableToLock->Guid\r | |
685 | );\r | |
ff843847 | 686 | }\r |
ff843847 | 687 | break;\r |
efb01a10 SZ |
688 | case SMM_VARIABLE_FUNCTION_VAR_CHECK_VARIABLE_PROPERTY_SET:\r |
689 | if (mEndOfDxe) {\r | |
690 | Status = EFI_ACCESS_DENIED;\r | |
691 | } else {\r | |
692 | CommVariableProperty = (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY *) SmmVariableFunctionHeader->Data;\r | |
693 | Status = VarCheckVariablePropertySet (\r | |
694 | CommVariableProperty->Name,\r | |
695 | &CommVariableProperty->Guid,\r | |
696 | &CommVariableProperty->VariableProperty\r | |
697 | );\r | |
698 | }\r | |
699 | break;\r | |
700 | case SMM_VARIABLE_FUNCTION_VAR_CHECK_VARIABLE_PROPERTY_GET:\r | |
701 | if (CommBufferPayloadSize < OFFSET_OF (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY, Name)) {\r | |
702 | DEBUG ((EFI_D_ERROR, "VarCheckVariablePropertyGet: SMM communication buffer size invalid!\n"));\r | |
703 | return EFI_SUCCESS;\r | |
704 | }\r | |
705 | //\r | |
706 | // Copy the input communicate buffer payload to pre-allocated SMM variable buffer payload.\r | |
707 | //\r | |
708 | CopyMem (mVariableBufferPayload, SmmVariableFunctionHeader->Data, CommBufferPayloadSize);\r | |
709 | CommVariableProperty = (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY *) mVariableBufferPayload;\r | |
710 | if ((UINTN) (~0) - CommVariableProperty->NameSize < OFFSET_OF (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY, Name)) {\r | |
711 | //\r | |
712 | // Prevent InfoSize overflow happen\r | |
713 | //\r | |
714 | Status = EFI_ACCESS_DENIED;\r | |
715 | goto EXIT;\r | |
716 | }\r | |
717 | InfoSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY, Name) + CommVariableProperty->NameSize;\r | |
718 | \r | |
719 | //\r | |
720 | // SMRAM range check already covered before\r | |
721 | //\r | |
722 | if (InfoSize > CommBufferPayloadSize) {\r | |
723 | DEBUG ((EFI_D_ERROR, "VarCheckVariablePropertyGet: Data size exceed communication buffer size limit!\n"));\r | |
724 | Status = EFI_ACCESS_DENIED;\r | |
725 | goto EXIT;\r | |
726 | }\r | |
727 | \r | |
728 | if (CommVariableProperty->NameSize < sizeof (CHAR16) || CommVariableProperty->Name[CommVariableProperty->NameSize/sizeof (CHAR16) - 1] != L'\0') {\r | |
729 | //\r | |
730 | // Make sure VariableName is A Null-terminated string.\r | |
731 | //\r | |
732 | Status = EFI_ACCESS_DENIED;\r | |
733 | goto EXIT;\r | |
734 | }\r | |
735 | \r | |
736 | Status = VarCheckVariablePropertyGet (\r | |
737 | CommVariableProperty->Name,\r | |
738 | &CommVariableProperty->Guid,\r | |
739 | &CommVariableProperty->VariableProperty\r | |
740 | );\r | |
741 | CopyMem (SmmVariableFunctionHeader->Data, mVariableBufferPayload, CommBufferPayloadSize);\r | |
742 | break;\r | |
ff843847 | 743 | \r |
8a2d4996 | 744 | default:\r |
8a2d4996 | 745 | Status = EFI_UNSUPPORTED;\r |
746 | }\r | |
747 | \r | |
2445a70e | 748 | EXIT:\r |
749 | \r | |
8a2d4996 | 750 | SmmVariableFunctionHeader->ReturnStatus = Status;\r |
751 | \r | |
752 | return EFI_SUCCESS;\r | |
753 | }\r | |
754 | \r | |
ff843847 RN |
755 | /**\r |
756 | SMM END_OF_DXE protocol notification event handler.\r | |
757 | \r | |
758 | @param Protocol Points to the protocol's unique identifier\r | |
759 | @param Interface Points to the interface instance\r | |
760 | @param Handle The handle on which the interface was installed\r | |
761 | \r | |
762 | @retval EFI_SUCCESS SmmEndOfDxeCallback runs successfully\r | |
763 | \r | |
764 | **/\r | |
765 | EFI_STATUS\r | |
766 | EFIAPI\r | |
767 | SmmEndOfDxeCallback (\r | |
768 | IN CONST EFI_GUID *Protocol,\r | |
769 | IN VOID *Interface,\r | |
770 | IN EFI_HANDLE Handle\r | |
771 | )\r | |
772 | {\r | |
773 | DEBUG ((EFI_D_INFO, "[Variable]END_OF_DXE is signaled\n"));\r | |
774 | mEndOfDxe = TRUE;\r | |
4edb1866 SZ |
775 | //\r |
776 | // The initialization for variable quota.\r | |
777 | //\r | |
778 | InitializeVariableQuota ();\r | |
0fb5e515 SZ |
779 | if (PcdGetBool (PcdReclaimVariableSpaceAtEndOfDxe)) {\r |
780 | ReclaimForOS ();\r | |
781 | }\r | |
ff843847 RN |
782 | return EFI_SUCCESS;\r |
783 | }\r | |
8a2d4996 | 784 | \r |
785 | /**\r | |
786 | SMM Fault Tolerant Write protocol notification event handler.\r | |
787 | \r | |
788 | Non-Volatile variable write may needs FTW protocol to reclaim when \r | |
789 | writting variable.\r | |
790 | \r | |
791 | @param Protocol Points to the protocol's unique identifier\r | |
792 | @param Interface Points to the interface instance\r | |
793 | @param Handle The handle on which the interface was installed\r | |
794 | \r | |
795 | @retval EFI_SUCCESS SmmEventCallback runs successfully\r | |
796 | @retval EFI_NOT_FOUND The Fvb protocol for variable is not found.\r | |
797 | \r | |
798 | **/\r | |
799 | EFI_STATUS\r | |
800 | EFIAPI\r | |
801 | SmmFtwNotificationEvent (\r | |
802 | IN CONST EFI_GUID *Protocol,\r | |
803 | IN VOID *Interface,\r | |
804 | IN EFI_HANDLE Handle\r | |
805 | )\r | |
806 | {\r | |
807 | EFI_STATUS Status;\r | |
808 | EFI_SMM_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvbProtocol;\r | |
809 | EFI_SMM_FAULT_TOLERANT_WRITE_PROTOCOL *FtwProtocol;\r | |
810 | EFI_PHYSICAL_ADDRESS NvStorageVariableBase;\r | |
2c4b18e0 | 811 | UINTN FtwMaxBlockSize;\r |
8a2d4996 | 812 | \r |
813 | if (mVariableModuleGlobal->FvbInstance != NULL) {\r | |
814 | return EFI_SUCCESS;\r | |
815 | }\r | |
816 | \r | |
817 | //\r | |
818 | // Ensure SMM FTW protocol is installed.\r | |
819 | //\r | |
5c7fa429 | 820 | Status = GetFtwProtocol ((VOID **)&FtwProtocol);\r |
8a2d4996 | 821 | if (EFI_ERROR (Status)) {\r |
822 | return Status;\r | |
823 | }\r | |
824 | \r | |
2c4b18e0 SZ |
825 | Status = FtwProtocol->GetMaxBlockSize (FtwProtocol, &FtwMaxBlockSize);\r |
826 | if (!EFI_ERROR (Status)) {\r | |
827 | ASSERT (PcdGet32 (PcdFlashNvStorageVariableSize) <= FtwMaxBlockSize);\r | |
828 | }\r | |
829 | \r | |
8a2d4996 | 830 | //\r |
831 | // Find the proper FVB protocol for variable.\r | |
832 | //\r | |
833 | NvStorageVariableBase = (EFI_PHYSICAL_ADDRESS) PcdGet64 (PcdFlashNvStorageVariableBase64);\r | |
834 | if (NvStorageVariableBase == 0) {\r | |
835 | NvStorageVariableBase = (EFI_PHYSICAL_ADDRESS) PcdGet32 (PcdFlashNvStorageVariableBase);\r | |
836 | }\r | |
837 | Status = GetFvbInfoByAddress (NvStorageVariableBase, NULL, &FvbProtocol);\r | |
838 | if (EFI_ERROR (Status)) {\r | |
839 | return EFI_NOT_FOUND;\r | |
840 | }\r | |
841 | \r | |
842 | mVariableModuleGlobal->FvbInstance = FvbProtocol;\r | |
843 | \r | |
844 | Status = VariableWriteServiceInitialize ();\r | |
845 | ASSERT_EFI_ERROR (Status);\r | |
846 | \r | |
847 | //\r | |
848 | // Notify the variable wrapper driver the variable write service is ready\r | |
849 | //\r | |
850 | Status = gBS->InstallProtocolInterface (\r | |
851 | &mSmmVariableHandle,\r | |
d00ed85e | 852 | &gSmmVariableWriteGuid,\r |
8a2d4996 | 853 | EFI_NATIVE_INTERFACE,\r |
854 | NULL\r | |
855 | );\r | |
856 | ASSERT_EFI_ERROR (Status);\r | |
857 | \r | |
858 | return EFI_SUCCESS;\r | |
859 | }\r | |
860 | \r | |
861 | \r | |
862 | /**\r | |
863 | Variable Driver main entry point. The Variable driver places the 4 EFI\r | |
864 | runtime services in the EFI System Table and installs arch protocols \r | |
d00ed85e | 865 | for variable read and write services being available. It also registers\r |
8a2d4996 | 866 | a notification function for an EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r |
867 | \r | |
868 | @param[in] ImageHandle The firmware allocated handle for the EFI image. \r | |
869 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
870 | \r | |
871 | @retval EFI_SUCCESS Variable service successfully initialized.\r | |
872 | \r | |
873 | **/\r | |
874 | EFI_STATUS\r | |
875 | EFIAPI\r | |
876 | VariableServiceInitialize (\r | |
877 | IN EFI_HANDLE ImageHandle,\r | |
878 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
879 | )\r | |
880 | {\r | |
881 | EFI_STATUS Status;\r | |
882 | EFI_HANDLE VariableHandle;\r | |
883 | VOID *SmmFtwRegistration;\r | |
ff843847 | 884 | VOID *SmmEndOfDxeRegistration;\r |
2445a70e | 885 | \r |
8a2d4996 | 886 | //\r |
887 | // Variable initialize.\r | |
888 | //\r | |
889 | Status = VariableCommonInitialize ();\r | |
890 | ASSERT_EFI_ERROR (Status);\r | |
891 | \r | |
892 | //\r | |
893 | // Install the Smm Variable Protocol on a new handle.\r | |
894 | //\r | |
895 | VariableHandle = NULL;\r | |
896 | Status = gSmst->SmmInstallProtocolInterface (\r | |
897 | &VariableHandle,\r | |
898 | &gEfiSmmVariableProtocolGuid,\r | |
899 | EFI_NATIVE_INTERFACE,\r | |
900 | &gSmmVariable\r | |
901 | );\r | |
902 | ASSERT_EFI_ERROR (Status);\r | |
903 | \r | |
efb01a10 SZ |
904 | Status = gSmst->SmmInstallProtocolInterface (\r |
905 | &VariableHandle,\r | |
906 | &gEdkiiSmmVarCheckProtocolGuid,\r | |
907 | EFI_NATIVE_INTERFACE,\r | |
908 | &mSmmVarCheck\r | |
909 | );\r | |
910 | ASSERT_EFI_ERROR (Status);\r | |
911 | \r | |
5e5bb2a9 | 912 | mVariableBufferPayloadSize = MAX (PcdGet32 (PcdMaxVariableSize), PcdGet32 (PcdMaxHardwareErrorVariableSize)) +\r |
efb01a10 | 913 | OFFSET_OF (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY, Name) - sizeof (VARIABLE_HEADER);\r |
5e5bb2a9 SZ |
914 | \r |
915 | Status = gSmst->SmmAllocatePool (\r | |
916 | EfiRuntimeServicesData,\r | |
917 | mVariableBufferPayloadSize,\r | |
918 | (VOID **)&mVariableBufferPayload\r | |
919 | );\r | |
920 | ASSERT_EFI_ERROR (Status);\r | |
921 | \r | |
8a2d4996 | 922 | ///\r |
923 | /// Register SMM variable SMI handler\r | |
924 | ///\r | |
925 | VariableHandle = NULL;\r | |
926 | Status = gSmst->SmiHandlerRegister (SmmVariableHandler, &gEfiSmmVariableProtocolGuid, &VariableHandle);\r | |
927 | ASSERT_EFI_ERROR (Status);\r | |
928 | \r | |
929 | //\r | |
930 | // Notify the variable wrapper driver the variable service is ready\r | |
931 | //\r | |
932 | Status = SystemTable->BootServices->InstallProtocolInterface (\r | |
933 | &mVariableHandle,\r | |
934 | &gEfiSmmVariableProtocolGuid,\r | |
935 | EFI_NATIVE_INTERFACE,\r | |
936 | &gSmmVariable\r | |
937 | );\r | |
938 | ASSERT_EFI_ERROR (Status);\r | |
939 | \r | |
ff843847 RN |
940 | //\r |
941 | // Register EFI_SMM_END_OF_DXE_PROTOCOL_GUID notify function.\r | |
942 | //\r | |
943 | Status = gSmst->SmmRegisterProtocolNotify (\r | |
944 | &gEfiSmmEndOfDxeProtocolGuid,\r | |
945 | SmmEndOfDxeCallback,\r | |
946 | &SmmEndOfDxeRegistration\r | |
947 | );\r | |
948 | ASSERT_EFI_ERROR (Status);\r | |
949 | \r | |
8a2d4996 | 950 | //\r |
951 | // Register FtwNotificationEvent () notify function.\r | |
952 | // \r | |
953 | Status = gSmst->SmmRegisterProtocolNotify (\r | |
954 | &gEfiSmmFaultTolerantWriteProtocolGuid,\r | |
955 | SmmFtwNotificationEvent,\r | |
956 | &SmmFtwRegistration\r | |
957 | );\r | |
958 | ASSERT_EFI_ERROR (Status);\r | |
959 | \r | |
960 | SmmFtwNotificationEvent (NULL, NULL, NULL);\r | |
961 | \r | |
962 | return EFI_SUCCESS;\r | |
963 | }\r | |
964 | \r | |
965 | \r |