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8a2d4996 | 1 | /** @file\r |
8a2d4996 | 2 | Implement all four UEFI Runtime Variable services for the nonvolatile\r |
3 | and volatile storage space and install variable architecture protocol\r | |
4 | based on SMM variable module.\r | |
5 | \r | |
18a7dbbc SZ |
6 | Caution: This module requires additional review when modified.\r |
7 | This driver will have external input - variable data.\r | |
8 | This external input must be validated carefully to avoid security issue like\r | |
9 | buffer overflow, integer overflow.\r | |
10 | \r | |
11 | RuntimeServiceGetVariable() and RuntimeServiceSetVariable() are external API\r | |
12 | to receive data buffer. The size should be checked carefully.\r | |
13 | \r | |
14 | InitCommunicateBuffer() is really function to check the variable data size.\r | |
15 | \r | |
aab3b9b9 | 16 | Copyright (c) 2010 - 2019, Intel Corporation. All rights reserved.<BR>\r |
9d510e61 | 17 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
8a2d4996 | 18 | \r |
19 | **/\r | |
d00ed85e | 20 | #include <PiDxe.h>\r |
8a2d4996 | 21 | #include <Protocol/VariableWrite.h>\r |
22 | #include <Protocol/Variable.h>\r | |
23 | #include <Protocol/SmmCommunication.h>\r | |
d00ed85e | 24 | #include <Protocol/SmmVariable.h>\r |
ff843847 | 25 | #include <Protocol/VariableLock.h>\r |
efb01a10 | 26 | #include <Protocol/VarCheck.h>\r |
8a2d4996 | 27 | \r |
28 | #include <Library/UefiBootServicesTableLib.h>\r | |
29 | #include <Library/UefiRuntimeServicesTableLib.h>\r | |
30 | #include <Library/MemoryAllocationLib.h>\r | |
31 | #include <Library/UefiDriverEntryPoint.h>\r | |
32 | #include <Library/UefiRuntimeLib.h>\r | |
33 | #include <Library/BaseMemoryLib.h>\r | |
34 | #include <Library/DebugLib.h>\r | |
8a2d4996 | 35 | #include <Library/UefiLib.h>\r |
36 | #include <Library/BaseLib.h>\r | |
37 | \r | |
38 | #include <Guid/EventGroup.h>\r | |
d00ed85e | 39 | #include <Guid/SmmVariableCommon.h>\r |
8a2d4996 | 40 | \r |
00663d04 | 41 | #include "PrivilegePolymorphic.h"\r |
aab3b9b9 | 42 | #include "VariableParsing.h"\r |
00663d04 | 43 | \r |
fa0737a8 | 44 | EFI_HANDLE mHandle = NULL;\r |
8a2d4996 | 45 | EFI_SMM_VARIABLE_PROTOCOL *mSmmVariable = NULL;\r |
46 | EFI_EVENT mVirtualAddressChangeEvent = NULL;\r | |
47 | EFI_SMM_COMMUNICATION_PROTOCOL *mSmmCommunication = NULL;\r | |
48 | UINT8 *mVariableBuffer = NULL;\r | |
49 | UINT8 *mVariableBufferPhysical = NULL;\r | |
aab3b9b9 MK |
50 | VARIABLE_INFO_ENTRY *mVariableInfo = NULL;\r |
51 | VARIABLE_STORE_HEADER *mVariableRuntimeHobCacheBuffer = NULL;\r | |
52 | VARIABLE_STORE_HEADER *mVariableRuntimeNvCacheBuffer = NULL;\r | |
53 | VARIABLE_STORE_HEADER *mVariableRuntimeVolatileCacheBuffer = NULL;\r | |
8a2d4996 | 54 | UINTN mVariableBufferSize;\r |
aab3b9b9 MK |
55 | UINTN mVariableRuntimeHobCacheBufferSize;\r |
56 | UINTN mVariableRuntimeNvCacheBufferSize;\r | |
57 | UINTN mVariableRuntimeVolatileCacheBufferSize;\r | |
5e5bb2a9 | 58 | UINTN mVariableBufferPayloadSize;\r |
aab3b9b9 MK |
59 | BOOLEAN mVariableRuntimeCachePendingUpdate;\r |
60 | BOOLEAN mVariableRuntimeCacheReadLock;\r | |
61 | BOOLEAN mVariableAuthFormat;\r | |
62 | BOOLEAN mHobFlushComplete;\r | |
6ed1ec59 | 63 | EFI_LOCK mVariableServicesLock;\r |
ff843847 | 64 | EDKII_VARIABLE_LOCK_PROTOCOL mVariableLock;\r |
efb01a10 | 65 | EDKII_VAR_CHECK_PROTOCOL mVarCheck;\r |
8a2d4996 | 66 | \r |
dc9bd6ed ZC |
67 | /**\r |
68 | Some Secure Boot Policy Variable may update following other variable changes(SecureBoot follows PK change, etc).\r | |
69 | Record their initial State when variable write service is ready.\r | |
70 | \r | |
71 | **/\r | |
72 | VOID\r | |
73 | EFIAPI\r | |
74 | RecordSecureBootPolicyVarData(\r | |
75 | VOID\r | |
76 | );\r | |
77 | \r | |
6ed1ec59 SZ |
78 | /**\r |
79 | Acquires lock only at boot time. Simply returns at runtime.\r | |
80 | \r | |
81 | This is a temperary function that will be removed when\r | |
82 | EfiAcquireLock() in UefiLib can handle the call in UEFI\r | |
83 | Runtimer driver in RT phase.\r | |
84 | It calls EfiAcquireLock() at boot time, and simply returns\r | |
85 | at runtime.\r | |
86 | \r | |
87 | @param Lock A pointer to the lock to acquire.\r | |
88 | \r | |
89 | **/\r | |
90 | VOID\r | |
91 | AcquireLockOnlyAtBootTime (\r | |
92 | IN EFI_LOCK *Lock\r | |
93 | )\r | |
94 | {\r | |
95 | if (!EfiAtRuntime ()) {\r | |
96 | EfiAcquireLock (Lock);\r | |
97 | }\r | |
98 | }\r | |
99 | \r | |
100 | /**\r | |
101 | Releases lock only at boot time. Simply returns at runtime.\r | |
102 | \r | |
103 | This is a temperary function which will be removed when\r | |
104 | EfiReleaseLock() in UefiLib can handle the call in UEFI\r | |
105 | Runtimer driver in RT phase.\r | |
106 | It calls EfiReleaseLock() at boot time and simply returns\r | |
107 | at runtime.\r | |
108 | \r | |
109 | @param Lock A pointer to the lock to release.\r | |
110 | \r | |
111 | **/\r | |
112 | VOID\r | |
113 | ReleaseLockOnlyAtBootTime (\r | |
114 | IN EFI_LOCK *Lock\r | |
115 | )\r | |
116 | {\r | |
117 | if (!EfiAtRuntime ()) {\r | |
118 | EfiReleaseLock (Lock);\r | |
119 | }\r | |
120 | }\r | |
8a2d4996 | 121 | \r |
aab3b9b9 MK |
122 | /**\r |
123 | Return TRUE if ExitBootServices () has been called.\r | |
124 | \r | |
125 | @retval TRUE If ExitBootServices () has been called. FALSE if ExitBootServices () has not been called.\r | |
126 | **/\r | |
127 | BOOLEAN\r | |
128 | AtRuntime (\r | |
129 | VOID\r | |
130 | )\r | |
131 | {\r | |
132 | return EfiAtRuntime ();\r | |
133 | }\r | |
134 | \r | |
135 | /**\r | |
136 | Initialize the variable cache buffer as an empty variable store.\r | |
137 | \r | |
138 | @param[out] VariableCacheBuffer A pointer to pointer of a cache variable store.\r | |
139 | @param[in,out] TotalVariableCacheSize On input, the minimum size needed for the UEFI variable store cache\r | |
140 | buffer that is allocated. On output, the actual size of the buffer allocated.\r | |
141 | If TotalVariableCacheSize is zero, a buffer will not be allocated and the\r | |
142 | function will return with EFI_SUCCESS.\r | |
143 | \r | |
144 | @retval EFI_SUCCESS The variable cache was allocated and initialized successfully.\r | |
145 | @retval EFI_INVALID_PARAMETER A given pointer is NULL or an invalid variable store size was specified.\r | |
146 | @retval EFI_OUT_OF_RESOURCES Insufficient resources are available to allocate the variable store cache buffer.\r | |
147 | \r | |
148 | **/\r | |
149 | EFI_STATUS\r | |
150 | InitVariableCache (\r | |
151 | OUT VARIABLE_STORE_HEADER **VariableCacheBuffer,\r | |
152 | IN OUT UINTN *TotalVariableCacheSize\r | |
153 | )\r | |
154 | {\r | |
155 | VARIABLE_STORE_HEADER *VariableCacheStorePtr;\r | |
156 | \r | |
157 | if (TotalVariableCacheSize == NULL) {\r | |
158 | return EFI_INVALID_PARAMETER;\r | |
159 | }\r | |
160 | if (*TotalVariableCacheSize == 0) {\r | |
161 | return EFI_SUCCESS;\r | |
162 | }\r | |
163 | if (VariableCacheBuffer == NULL || *TotalVariableCacheSize < sizeof (VARIABLE_STORE_HEADER)) {\r | |
164 | return EFI_INVALID_PARAMETER;\r | |
165 | }\r | |
166 | *TotalVariableCacheSize = ALIGN_VALUE (*TotalVariableCacheSize, sizeof (UINT32));\r | |
167 | \r | |
168 | //\r | |
169 | // Allocate NV Storage Cache and initialize it to all 1's (like an erased FV)\r | |
170 | //\r | |
171 | *VariableCacheBuffer = (VARIABLE_STORE_HEADER *) AllocateRuntimePages (\r | |
172 | EFI_SIZE_TO_PAGES (*TotalVariableCacheSize)\r | |
173 | );\r | |
174 | if (*VariableCacheBuffer == NULL) {\r | |
175 | return EFI_OUT_OF_RESOURCES;\r | |
176 | }\r | |
177 | VariableCacheStorePtr = *VariableCacheBuffer;\r | |
178 | SetMem32 ((VOID *) VariableCacheStorePtr, *TotalVariableCacheSize, (UINT32) 0xFFFFFFFF);\r | |
179 | \r | |
180 | ZeroMem ((VOID *) VariableCacheStorePtr, sizeof (VARIABLE_STORE_HEADER));\r | |
181 | VariableCacheStorePtr->Size = (UINT32) *TotalVariableCacheSize;\r | |
182 | VariableCacheStorePtr->Format = VARIABLE_STORE_FORMATTED;\r | |
183 | VariableCacheStorePtr->State = VARIABLE_STORE_HEALTHY;\r | |
184 | \r | |
185 | return EFI_SUCCESS;\r | |
186 | }\r | |
187 | \r | |
8a2d4996 | 188 | /**\r |
189 | Initialize the communicate buffer using DataSize and Function.\r | |
190 | \r | |
191 | The communicate size is: SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE +\r | |
192 | DataSize.\r | |
193 | \r | |
18a7dbbc SZ |
194 | Caution: This function may receive untrusted input.\r |
195 | The data size external input, so this function will validate it carefully to avoid buffer overflow.\r | |
196 | \r | |
8a2d4996 | 197 | @param[out] DataPtr Points to the data in the communicate buffer.\r |
198 | @param[in] DataSize The data size to send to SMM.\r | |
199 | @param[in] Function The function number to initialize the communicate header.\r | |
fa0737a8 | 200 | \r |
8a2d4996 | 201 | @retval EFI_INVALID_PARAMETER The data size is too big.\r |
202 | @retval EFI_SUCCESS Find the specified variable.\r | |
203 | \r | |
204 | **/\r | |
205 | EFI_STATUS\r | |
206 | InitCommunicateBuffer (\r | |
207 | OUT VOID **DataPtr OPTIONAL,\r | |
208 | IN UINTN DataSize,\r | |
209 | IN UINTN Function\r | |
210 | )\r | |
211 | {\r | |
fa0737a8 SZ |
212 | EFI_SMM_COMMUNICATE_HEADER *SmmCommunicateHeader;\r |
213 | SMM_VARIABLE_COMMUNICATE_HEADER *SmmVariableFunctionHeader;\r | |
214 | \r | |
8a2d4996 | 215 | \r |
8a2d4996 | 216 | if (DataSize + SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE > mVariableBufferSize) {\r |
217 | return EFI_INVALID_PARAMETER;\r | |
218 | }\r | |
219 | \r | |
220 | SmmCommunicateHeader = (EFI_SMM_COMMUNICATE_HEADER *) mVariableBuffer;\r | |
221 | CopyGuid (&SmmCommunicateHeader->HeaderGuid, &gEfiSmmVariableProtocolGuid);\r | |
222 | SmmCommunicateHeader->MessageLength = DataSize + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE;\r | |
fa0737a8 | 223 | \r |
8a2d4996 | 224 | SmmVariableFunctionHeader = (SMM_VARIABLE_COMMUNICATE_HEADER *) SmmCommunicateHeader->Data;\r |
225 | SmmVariableFunctionHeader->Function = Function;\r | |
226 | if (DataPtr != NULL) {\r | |
227 | *DataPtr = SmmVariableFunctionHeader->Data;\r | |
228 | }\r | |
229 | \r | |
230 | return EFI_SUCCESS;\r | |
231 | }\r | |
232 | \r | |
233 | \r | |
234 | /**\r | |
235 | Send the data in communicate buffer to SMM.\r | |
236 | \r | |
237 | @param[in] DataSize This size of the function header and the data.\r | |
238 | \r | |
32732a33 | 239 | @retval EFI_SUCCESS Success is returned from the functin in SMM.\r |
fa0737a8 SZ |
240 | @retval Others Failure is returned from the function in SMM.\r |
241 | \r | |
8a2d4996 | 242 | **/\r |
243 | EFI_STATUS\r | |
244 | SendCommunicateBuffer (\r | |
245 | IN UINTN DataSize\r | |
246 | )\r | |
247 | {\r | |
248 | EFI_STATUS Status;\r | |
249 | UINTN CommSize;\r | |
fa0737a8 | 250 | EFI_SMM_COMMUNICATE_HEADER *SmmCommunicateHeader;\r |
8a2d4996 | 251 | SMM_VARIABLE_COMMUNICATE_HEADER *SmmVariableFunctionHeader;\r |
fa0737a8 | 252 | \r |
8a2d4996 | 253 | CommSize = DataSize + SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE;\r |
254 | Status = mSmmCommunication->Communicate (mSmmCommunication, mVariableBufferPhysical, &CommSize);\r | |
255 | ASSERT_EFI_ERROR (Status);\r | |
256 | \r | |
257 | SmmCommunicateHeader = (EFI_SMM_COMMUNICATE_HEADER *) mVariableBuffer;\r | |
258 | SmmVariableFunctionHeader = (SMM_VARIABLE_COMMUNICATE_HEADER *)SmmCommunicateHeader->Data;\r | |
259 | return SmmVariableFunctionHeader->ReturnStatus;\r | |
260 | }\r | |
261 | \r | |
ff843847 RN |
262 | /**\r |
263 | Mark a variable that will become read-only after leaving the DXE phase of execution.\r | |
264 | \r | |
265 | @param[in] This The VARIABLE_LOCK_PROTOCOL instance.\r | |
266 | @param[in] VariableName A pointer to the variable name that will be made read-only subsequently.\r | |
267 | @param[in] VendorGuid A pointer to the vendor GUID that will be made read-only subsequently.\r | |
268 | \r | |
269 | @retval EFI_SUCCESS The variable specified by the VariableName and the VendorGuid was marked\r | |
270 | as pending to be read-only.\r | |
271 | @retval EFI_INVALID_PARAMETER VariableName or VendorGuid is NULL.\r | |
272 | Or VariableName is an empty string.\r | |
273 | @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r | |
274 | already been signaled.\r | |
275 | @retval EFI_OUT_OF_RESOURCES There is not enough resource to hold the lock request.\r | |
276 | **/\r | |
277 | EFI_STATUS\r | |
278 | EFIAPI\r | |
279 | VariableLockRequestToLock (\r | |
280 | IN CONST EDKII_VARIABLE_LOCK_PROTOCOL *This,\r | |
281 | IN CHAR16 *VariableName,\r | |
282 | IN EFI_GUID *VendorGuid\r | |
283 | )\r | |
284 | {\r | |
285 | EFI_STATUS Status;\r | |
51547bb8 | 286 | UINTN VariableNameSize;\r |
ff843847 RN |
287 | UINTN PayloadSize;\r |
288 | SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE *VariableToLock;\r | |
289 | \r | |
290 | if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {\r | |
291 | return EFI_INVALID_PARAMETER;\r | |
292 | }\r | |
293 | \r | |
51547bb8 | 294 | VariableNameSize = StrSize (VariableName);\r |
4e1005ec | 295 | VariableToLock = NULL;\r |
51547bb8 RN |
296 | \r |
297 | //\r | |
298 | // If VariableName exceeds SMM payload limit. Return failure\r | |
299 | //\r | |
300 | if (VariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE, Name)) {\r | |
301 | return EFI_INVALID_PARAMETER;\r | |
302 | }\r | |
303 | \r | |
ff843847 RN |
304 | AcquireLockOnlyAtBootTime(&mVariableServicesLock);\r |
305 | \r | |
306 | //\r | |
307 | // Init the communicate buffer. The buffer data size is:\r | |
308 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize.\r | |
309 | //\r | |
51547bb8 | 310 | PayloadSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE, Name) + VariableNameSize;\r |
ff843847 RN |
311 | Status = InitCommunicateBuffer ((VOID **) &VariableToLock, PayloadSize, SMM_VARIABLE_FUNCTION_LOCK_VARIABLE);\r |
312 | if (EFI_ERROR (Status)) {\r | |
313 | goto Done;\r | |
314 | }\r | |
315 | ASSERT (VariableToLock != NULL);\r | |
316 | \r | |
317 | CopyGuid (&VariableToLock->Guid, VendorGuid);\r | |
51547bb8 | 318 | VariableToLock->NameSize = VariableNameSize;\r |
ff843847 RN |
319 | CopyMem (VariableToLock->Name, VariableName, VariableToLock->NameSize);\r |
320 | \r | |
321 | //\r | |
322 | // Send data to SMM.\r | |
323 | //\r | |
324 | Status = SendCommunicateBuffer (PayloadSize);\r | |
325 | \r | |
326 | Done:\r | |
327 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
328 | return Status;\r | |
329 | }\r | |
8a2d4996 | 330 | \r |
efb01a10 SZ |
331 | /**\r |
332 | Register SetVariable check handler.\r | |
333 | \r | |
334 | @param[in] Handler Pointer to check handler.\r | |
335 | \r | |
336 | @retval EFI_SUCCESS The SetVariable check handler was registered successfully.\r | |
337 | @retval EFI_INVALID_PARAMETER Handler is NULL.\r | |
338 | @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r | |
339 | already been signaled.\r | |
340 | @retval EFI_OUT_OF_RESOURCES There is not enough resource for the SetVariable check handler register request.\r | |
341 | @retval EFI_UNSUPPORTED This interface is not implemented.\r | |
342 | For example, it is unsupported in VarCheck protocol if both VarCheck and SmmVarCheck protocols are present.\r | |
343 | \r | |
344 | **/\r | |
345 | EFI_STATUS\r | |
346 | EFIAPI\r | |
347 | VarCheckRegisterSetVariableCheckHandler (\r | |
348 | IN VAR_CHECK_SET_VARIABLE_CHECK_HANDLER Handler\r | |
349 | )\r | |
350 | {\r | |
351 | return EFI_UNSUPPORTED;\r | |
352 | }\r | |
353 | \r | |
354 | /**\r | |
355 | Variable property set.\r | |
356 | \r | |
357 | @param[in] Name Pointer to the variable name.\r | |
358 | @param[in] Guid Pointer to the vendor GUID.\r | |
359 | @param[in] VariableProperty Pointer to the input variable property.\r | |
360 | \r | |
361 | @retval EFI_SUCCESS The property of variable specified by the Name and Guid was set successfully.\r | |
362 | @retval EFI_INVALID_PARAMETER Name, Guid or VariableProperty is NULL, or Name is an empty string,\r | |
363 | or the fields of VariableProperty are not valid.\r | |
364 | @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r | |
365 | already been signaled.\r | |
366 | @retval EFI_OUT_OF_RESOURCES There is not enough resource for the variable property set request.\r | |
367 | \r | |
368 | **/\r | |
369 | EFI_STATUS\r | |
370 | EFIAPI\r | |
371 | VarCheckVariablePropertySet (\r | |
372 | IN CHAR16 *Name,\r | |
373 | IN EFI_GUID *Guid,\r | |
374 | IN VAR_CHECK_VARIABLE_PROPERTY *VariableProperty\r | |
375 | )\r | |
376 | {\r | |
377 | EFI_STATUS Status;\r | |
378 | UINTN VariableNameSize;\r | |
379 | UINTN PayloadSize;\r | |
380 | SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY *CommVariableProperty;\r | |
381 | \r | |
382 | if (Name == NULL || Name[0] == 0 || Guid == NULL) {\r | |
383 | return EFI_INVALID_PARAMETER;\r | |
384 | }\r | |
385 | \r | |
386 | if (VariableProperty == NULL) {\r | |
387 | return EFI_INVALID_PARAMETER;\r | |
388 | }\r | |
389 | \r | |
390 | if (VariableProperty->Revision != VAR_CHECK_VARIABLE_PROPERTY_REVISION) {\r | |
391 | return EFI_INVALID_PARAMETER;\r | |
392 | }\r | |
393 | \r | |
394 | VariableNameSize = StrSize (Name);\r | |
395 | CommVariableProperty = NULL;\r | |
396 | \r | |
397 | //\r | |
398 | // If VariableName exceeds SMM payload limit. Return failure\r | |
399 | //\r | |
400 | if (VariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY, Name)) {\r | |
401 | return EFI_INVALID_PARAMETER;\r | |
402 | }\r | |
403 | \r | |
404 | AcquireLockOnlyAtBootTime (&mVariableServicesLock);\r | |
405 | \r | |
406 | //\r | |
407 | // Init the communicate buffer. The buffer data size is:\r | |
408 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize.\r | |
409 | //\r | |
410 | PayloadSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY, Name) + VariableNameSize;\r | |
411 | Status = InitCommunicateBuffer ((VOID **) &CommVariableProperty, PayloadSize, SMM_VARIABLE_FUNCTION_VAR_CHECK_VARIABLE_PROPERTY_SET);\r | |
412 | if (EFI_ERROR (Status)) {\r | |
413 | goto Done;\r | |
414 | }\r | |
415 | ASSERT (CommVariableProperty != NULL);\r | |
416 | \r | |
417 | CopyGuid (&CommVariableProperty->Guid, Guid);\r | |
418 | CopyMem (&CommVariableProperty->VariableProperty, VariableProperty, sizeof (*VariableProperty));\r | |
419 | CommVariableProperty->NameSize = VariableNameSize;\r | |
420 | CopyMem (CommVariableProperty->Name, Name, CommVariableProperty->NameSize);\r | |
421 | \r | |
422 | //\r | |
423 | // Send data to SMM.\r | |
424 | //\r | |
425 | Status = SendCommunicateBuffer (PayloadSize);\r | |
426 | \r | |
427 | Done:\r | |
428 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
429 | return Status;\r | |
430 | }\r | |
431 | \r | |
432 | /**\r | |
433 | Variable property get.\r | |
434 | \r | |
435 | @param[in] Name Pointer to the variable name.\r | |
436 | @param[in] Guid Pointer to the vendor GUID.\r | |
437 | @param[out] VariableProperty Pointer to the output variable property.\r | |
438 | \r | |
439 | @retval EFI_SUCCESS The property of variable specified by the Name and Guid was got successfully.\r | |
440 | @retval EFI_INVALID_PARAMETER Name, Guid or VariableProperty is NULL, or Name is an empty string.\r | |
441 | @retval EFI_NOT_FOUND The property of variable specified by the Name and Guid was not found.\r | |
442 | \r | |
443 | **/\r | |
444 | EFI_STATUS\r | |
445 | EFIAPI\r | |
446 | VarCheckVariablePropertyGet (\r | |
447 | IN CHAR16 *Name,\r | |
448 | IN EFI_GUID *Guid,\r | |
449 | OUT VAR_CHECK_VARIABLE_PROPERTY *VariableProperty\r | |
450 | )\r | |
451 | {\r | |
452 | EFI_STATUS Status;\r | |
453 | UINTN VariableNameSize;\r | |
454 | UINTN PayloadSize;\r | |
455 | SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY *CommVariableProperty;\r | |
456 | \r | |
457 | if (Name == NULL || Name[0] == 0 || Guid == NULL) {\r | |
458 | return EFI_INVALID_PARAMETER;\r | |
459 | }\r | |
460 | \r | |
461 | if (VariableProperty == NULL) {\r | |
462 | return EFI_INVALID_PARAMETER;\r | |
463 | }\r | |
464 | \r | |
465 | VariableNameSize = StrSize (Name);\r | |
466 | CommVariableProperty = NULL;\r | |
467 | \r | |
468 | //\r | |
469 | // If VariableName exceeds SMM payload limit. Return failure\r | |
470 | //\r | |
471 | if (VariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY, Name)) {\r | |
472 | return EFI_INVALID_PARAMETER;\r | |
473 | }\r | |
474 | \r | |
475 | AcquireLockOnlyAtBootTime (&mVariableServicesLock);\r | |
476 | \r | |
477 | //\r | |
478 | // Init the communicate buffer. The buffer data size is:\r | |
479 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize.\r | |
480 | //\r | |
481 | PayloadSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_VAR_CHECK_VARIABLE_PROPERTY, Name) + VariableNameSize;\r | |
482 | Status = InitCommunicateBuffer ((VOID **) &CommVariableProperty, PayloadSize, SMM_VARIABLE_FUNCTION_VAR_CHECK_VARIABLE_PROPERTY_GET);\r | |
483 | if (EFI_ERROR (Status)) {\r | |
484 | goto Done;\r | |
485 | }\r | |
486 | ASSERT (CommVariableProperty != NULL);\r | |
487 | \r | |
488 | CopyGuid (&CommVariableProperty->Guid, Guid);\r | |
489 | CommVariableProperty->NameSize = VariableNameSize;\r | |
490 | CopyMem (CommVariableProperty->Name, Name, CommVariableProperty->NameSize);\r | |
491 | \r | |
492 | //\r | |
493 | // Send data to SMM.\r | |
494 | //\r | |
495 | Status = SendCommunicateBuffer (PayloadSize);\r | |
496 | if (Status == EFI_SUCCESS) {\r | |
497 | CopyMem (VariableProperty, &CommVariableProperty->VariableProperty, sizeof (*VariableProperty));\r | |
498 | }\r | |
499 | \r | |
500 | Done:\r | |
501 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
502 | return Status;\r | |
503 | }\r | |
504 | \r | |
8a2d4996 | 505 | /**\r |
aab3b9b9 MK |
506 | Signals SMM to synchronize any pending variable updates with the runtime cache(s).\r |
507 | \r | |
508 | **/\r | |
509 | VOID\r | |
510 | SyncRuntimeCache (\r | |
511 | VOID\r | |
512 | )\r | |
513 | {\r | |
514 | //\r | |
515 | // Init the communicate buffer. The buffer data size is:\r | |
516 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE.\r | |
517 | //\r | |
518 | InitCommunicateBuffer (NULL, 0, SMM_VARIABLE_FUNCTION_SYNC_RUNTIME_CACHE);\r | |
519 | \r | |
520 | //\r | |
521 | // Send data to SMM.\r | |
522 | //\r | |
523 | SendCommunicateBuffer (0);\r | |
524 | }\r | |
525 | \r | |
526 | /**\r | |
527 | Check whether a SMI must be triggered to retrieve pending cache updates.\r | |
528 | \r | |
529 | If the variable HOB was finished being flushed since the last check for a runtime cache update, this function\r | |
530 | will prevent the HOB cache from being used for future runtime cache hits.\r | |
531 | \r | |
532 | **/\r | |
533 | VOID\r | |
534 | CheckForRuntimeCacheSync (\r | |
535 | VOID\r | |
536 | )\r | |
537 | {\r | |
538 | if (mVariableRuntimeCachePendingUpdate) {\r | |
539 | SyncRuntimeCache ();\r | |
540 | }\r | |
541 | ASSERT (!mVariableRuntimeCachePendingUpdate);\r | |
542 | \r | |
543 | //\r | |
544 | // The HOB variable data may have finished being flushed in the runtime cache sync update\r | |
545 | //\r | |
546 | if (mHobFlushComplete && mVariableRuntimeHobCacheBuffer != NULL) {\r | |
547 | if (!EfiAtRuntime ()) {\r | |
548 | FreePages (mVariableRuntimeHobCacheBuffer, EFI_SIZE_TO_PAGES (mVariableRuntimeHobCacheBufferSize));\r | |
549 | }\r | |
550 | mVariableRuntimeHobCacheBuffer = NULL;\r | |
551 | }\r | |
552 | }\r | |
553 | \r | |
554 | /**\r | |
555 | Finds the given variable in a runtime cache variable store.\r | |
8a2d4996 | 556 | \r |
18a7dbbc SZ |
557 | Caution: This function may receive untrusted input.\r |
558 | The data size is external input, so this function will validate it carefully to avoid buffer overflow.\r | |
559 | \r | |
8a2d4996 | 560 | @param[in] VariableName Name of Variable to be found.\r |
561 | @param[in] VendorGuid Variable vendor GUID.\r | |
562 | @param[out] Attributes Attribute value of the variable found.\r | |
563 | @param[in, out] DataSize Size of Data found. If size is less than the\r | |
564 | data, this value contains the required size.\r | |
565 | @param[out] Data Data pointer.\r | |
fa0737a8 | 566 | \r |
aab3b9b9 | 567 | @retval EFI_SUCCESS Found the specified variable.\r |
8a2d4996 | 568 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r |
aab3b9b9 | 569 | @retval EFI_NOT_FOUND The specified variable could not be found.\r |
8a2d4996 | 570 | \r |
571 | **/\r | |
572 | EFI_STATUS\r | |
aab3b9b9 | 573 | FindVariableInRuntimeCache (\r |
8a2d4996 | 574 | IN CHAR16 *VariableName,\r |
575 | IN EFI_GUID *VendorGuid,\r | |
576 | OUT UINT32 *Attributes OPTIONAL,\r | |
577 | IN OUT UINTN *DataSize,\r | |
aab3b9b9 MK |
578 | OUT VOID *Data OPTIONAL\r |
579 | )\r | |
580 | {\r | |
581 | EFI_STATUS Status;\r | |
582 | UINTN TempDataSize;\r | |
583 | VARIABLE_POINTER_TRACK RtPtrTrack;\r | |
584 | VARIABLE_STORE_TYPE StoreType;\r | |
585 | VARIABLE_STORE_HEADER *VariableStoreList[VariableStoreTypeMax];\r | |
586 | \r | |
587 | Status = EFI_NOT_FOUND;\r | |
588 | \r | |
589 | if (VariableName == NULL || VendorGuid == NULL || DataSize == NULL) {\r | |
590 | return EFI_INVALID_PARAMETER;\r | |
591 | }\r | |
592 | \r | |
593 | //\r | |
594 | // The UEFI specification restricts Runtime Services callers from invoking the same or certain other Runtime Service\r | |
595 | // functions prior to completion and return from a previous Runtime Service call. These restrictions prevent\r | |
596 | // a GetVariable () or GetNextVariable () call from being issued until a prior call has returned. The runtime\r | |
597 | // cache read lock should always be free when entering this function.\r | |
598 | //\r | |
599 | ASSERT (!mVariableRuntimeCacheReadLock);\r | |
600 | \r | |
601 | mVariableRuntimeCacheReadLock = TRUE;\r | |
602 | CheckForRuntimeCacheSync ();\r | |
603 | \r | |
604 | if (!mVariableRuntimeCachePendingUpdate) {\r | |
605 | //\r | |
606 | // 0: Volatile, 1: HOB, 2: Non-Volatile.\r | |
607 | // The index and attributes mapping must be kept in this order as FindVariable\r | |
608 | // makes use of this mapping to implement search algorithm.\r | |
609 | //\r | |
610 | VariableStoreList[VariableStoreTypeVolatile] = mVariableRuntimeVolatileCacheBuffer;\r | |
611 | VariableStoreList[VariableStoreTypeHob] = mVariableRuntimeHobCacheBuffer;\r | |
612 | VariableStoreList[VariableStoreTypeNv] = mVariableRuntimeNvCacheBuffer;\r | |
613 | \r | |
614 | for (StoreType = (VARIABLE_STORE_TYPE) 0; StoreType < VariableStoreTypeMax; StoreType++) {\r | |
615 | if (VariableStoreList[StoreType] == NULL) {\r | |
616 | continue;\r | |
617 | }\r | |
618 | \r | |
619 | RtPtrTrack.StartPtr = GetStartPointer (VariableStoreList[StoreType]);\r | |
620 | RtPtrTrack.EndPtr = GetEndPointer (VariableStoreList[StoreType]);\r | |
621 | RtPtrTrack.Volatile = (BOOLEAN) (StoreType == VariableStoreTypeVolatile);\r | |
622 | \r | |
623 | Status = FindVariableEx (VariableName, VendorGuid, FALSE, &RtPtrTrack, mVariableAuthFormat);\r | |
624 | if (!EFI_ERROR (Status)) {\r | |
625 | break;\r | |
626 | }\r | |
627 | }\r | |
628 | \r | |
629 | if (!EFI_ERROR (Status)) {\r | |
630 | //\r | |
631 | // Get data size\r | |
632 | //\r | |
633 | TempDataSize = DataSizeOfVariable (RtPtrTrack.CurrPtr, mVariableAuthFormat);\r | |
634 | ASSERT (TempDataSize != 0);\r | |
635 | \r | |
636 | if (*DataSize >= TempDataSize) {\r | |
637 | if (Data == NULL) {\r | |
638 | Status = EFI_INVALID_PARAMETER;\r | |
639 | goto Done;\r | |
640 | }\r | |
641 | \r | |
642 | CopyMem (Data, GetVariableDataPtr (RtPtrTrack.CurrPtr, mVariableAuthFormat), TempDataSize);\r | |
643 | if (Attributes != NULL) {\r | |
644 | *Attributes = RtPtrTrack.CurrPtr->Attributes;\r | |
645 | }\r | |
646 | \r | |
647 | *DataSize = TempDataSize;\r | |
648 | \r | |
649 | UpdateVariableInfo (VariableName, VendorGuid, RtPtrTrack.Volatile, TRUE, FALSE, FALSE, TRUE, &mVariableInfo);\r | |
650 | \r | |
651 | Status = EFI_SUCCESS;\r | |
652 | goto Done;\r | |
653 | } else {\r | |
654 | *DataSize = TempDataSize;\r | |
655 | Status = EFI_BUFFER_TOO_SMALL;\r | |
656 | goto Done;\r | |
657 | }\r | |
658 | }\r | |
659 | }\r | |
660 | \r | |
661 | Done:\r | |
662 | mVariableRuntimeCacheReadLock = FALSE;\r | |
663 | \r | |
664 | return Status;\r | |
665 | }\r | |
666 | \r | |
667 | /**\r | |
668 | Finds the given variable in a variable store in SMM.\r | |
669 | \r | |
670 | Caution: This function may receive untrusted input.\r | |
671 | The data size is external input, so this function will validate it carefully to avoid buffer overflow.\r | |
672 | \r | |
673 | @param[in] VariableName Name of Variable to be found.\r | |
674 | @param[in] VendorGuid Variable vendor GUID.\r | |
675 | @param[out] Attributes Attribute value of the variable found.\r | |
676 | @param[in, out] DataSize Size of Data found. If size is less than the\r | |
677 | data, this value contains the required size.\r | |
678 | @param[out] Data Data pointer.\r | |
679 | \r | |
680 | @retval EFI_SUCCESS Found the specified variable.\r | |
681 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
682 | @retval EFI_NOT_FOUND The specified variable could not be found.\r | |
683 | \r | |
684 | **/\r | |
685 | EFI_STATUS\r | |
686 | FindVariableInSmm (\r | |
687 | IN CHAR16 *VariableName,\r | |
688 | IN EFI_GUID *VendorGuid,\r | |
689 | OUT UINT32 *Attributes OPTIONAL,\r | |
690 | IN OUT UINTN *DataSize,\r | |
691 | OUT VOID *Data OPTIONAL\r | |
8a2d4996 | 692 | )\r |
693 | {\r | |
694 | EFI_STATUS Status;\r | |
695 | UINTN PayloadSize;\r | |
696 | SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE *SmmVariableHeader;\r | |
3a146f2a | 697 | UINTN TempDataSize;\r |
9d00d20e | 698 | UINTN VariableNameSize;\r |
8a2d4996 | 699 | \r |
700 | if (VariableName == NULL || VendorGuid == NULL || DataSize == NULL) {\r | |
701 | return EFI_INVALID_PARAMETER;\r | |
702 | }\r | |
703 | \r | |
3a146f2a | 704 | TempDataSize = *DataSize;\r |
9d00d20e | 705 | VariableNameSize = StrSize (VariableName);\r |
4e1005ec | 706 | SmmVariableHeader = NULL;\r |
3a146f2a | 707 | \r |
708 | //\r | |
709 | // If VariableName exceeds SMM payload limit. Return failure\r | |
710 | //\r | |
5e5bb2a9 | 711 | if (VariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name)) {\r |
3588bb35 SZ |
712 | return EFI_INVALID_PARAMETER;\r |
713 | }\r | |
714 | \r | |
8a2d4996 | 715 | //\r |
716 | // Init the communicate buffer. The buffer data size is:\r | |
6ed1ec59 | 717 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize.\r |
8a2d4996 | 718 | //\r |
5e5bb2a9 | 719 | if (TempDataSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) - VariableNameSize) {\r |
3a146f2a | 720 | //\r |
721 | // If output data buffer exceed SMM payload limit. Trim output buffer to SMM payload size\r | |
722 | //\r | |
5e5bb2a9 | 723 | TempDataSize = mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) - VariableNameSize;\r |
3a146f2a | 724 | }\r |
9d00d20e | 725 | PayloadSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) + VariableNameSize + TempDataSize;\r |
3a146f2a | 726 | \r |
aab3b9b9 | 727 | Status = InitCommunicateBuffer ((VOID **) &SmmVariableHeader, PayloadSize, SMM_VARIABLE_FUNCTION_GET_VARIABLE);\r |
8a2d4996 | 728 | if (EFI_ERROR (Status)) {\r |
6ed1ec59 | 729 | goto Done;\r |
8a2d4996 | 730 | }\r |
731 | ASSERT (SmmVariableHeader != NULL);\r | |
732 | \r | |
733 | CopyGuid (&SmmVariableHeader->Guid, VendorGuid);\r | |
3a146f2a | 734 | SmmVariableHeader->DataSize = TempDataSize;\r |
9d00d20e | 735 | SmmVariableHeader->NameSize = VariableNameSize;\r |
8a2d4996 | 736 | if (Attributes == NULL) {\r |
737 | SmmVariableHeader->Attributes = 0;\r | |
738 | } else {\r | |
739 | SmmVariableHeader->Attributes = *Attributes;\r | |
740 | }\r | |
741 | CopyMem (SmmVariableHeader->Name, VariableName, SmmVariableHeader->NameSize);\r | |
742 | \r | |
743 | //\r | |
744 | // Send data to SMM.\r | |
745 | //\r | |
746 | Status = SendCommunicateBuffer (PayloadSize);\r | |
747 | \r | |
748 | //\r | |
749 | // Get data from SMM.\r | |
750 | //\r | |
3a146f2a | 751 | if (Status == EFI_SUCCESS || Status == EFI_BUFFER_TOO_SMALL) {\r |
752 | //\r | |
753 | // SMM CommBuffer DataSize can be a trimed value\r | |
754 | // Only update DataSize when needed\r | |
755 | //\r | |
756 | *DataSize = SmmVariableHeader->DataSize;\r | |
757 | }\r | |
8a2d4996 | 758 | if (Attributes != NULL) {\r |
759 | *Attributes = SmmVariableHeader->Attributes;\r | |
760 | }\r | |
761 | \r | |
762 | if (EFI_ERROR (Status)) {\r | |
6ed1ec59 | 763 | goto Done;\r |
8a2d4996 | 764 | }\r |
765 | \r | |
82e47eb2 SZ |
766 | if (Data != NULL) {\r |
767 | CopyMem (Data, (UINT8 *)SmmVariableHeader->Name + SmmVariableHeader->NameSize, SmmVariableHeader->DataSize);\r | |
768 | } else {\r | |
769 | Status = EFI_INVALID_PARAMETER;\r | |
770 | }\r | |
8a2d4996 | 771 | \r |
6ed1ec59 | 772 | Done:\r |
8a2d4996 | 773 | return Status;\r |
774 | }\r | |
775 | \r | |
aab3b9b9 MK |
776 | /**\r |
777 | This code finds variable in storage blocks (Volatile or Non-Volatile).\r | |
778 | \r | |
779 | Caution: This function may receive untrusted input.\r | |
780 | The data size is external input, so this function will validate it carefully to avoid buffer overflow.\r | |
781 | \r | |
782 | @param[in] VariableName Name of Variable to be found.\r | |
783 | @param[in] VendorGuid Variable vendor GUID.\r | |
784 | @param[out] Attributes Attribute value of the variable found.\r | |
785 | @param[in, out] DataSize Size of Data found. If size is less than the\r | |
786 | data, this value contains the required size.\r | |
787 | @param[out] Data Data pointer.\r | |
788 | \r | |
789 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
790 | @retval EFI_SUCCESS Find the specified variable.\r | |
791 | @retval EFI_NOT_FOUND Not found.\r | |
792 | @retval EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r | |
793 | \r | |
794 | **/\r | |
795 | EFI_STATUS\r | |
796 | EFIAPI\r | |
797 | RuntimeServiceGetVariable (\r | |
798 | IN CHAR16 *VariableName,\r | |
799 | IN EFI_GUID *VendorGuid,\r | |
800 | OUT UINT32 *Attributes OPTIONAL,\r | |
801 | IN OUT UINTN *DataSize,\r | |
802 | OUT VOID *Data\r | |
803 | )\r | |
804 | {\r | |
805 | EFI_STATUS Status;\r | |
806 | \r | |
807 | if (VariableName == NULL || VendorGuid == NULL || DataSize == NULL) {\r | |
808 | return EFI_INVALID_PARAMETER;\r | |
809 | }\r | |
810 | if (VariableName[0] == 0) {\r | |
811 | return EFI_NOT_FOUND;\r | |
812 | }\r | |
813 | \r | |
814 | AcquireLockOnlyAtBootTime (&mVariableServicesLock);\r | |
815 | if (FeaturePcdGet (PcdEnableVariableRuntimeCache)) {\r | |
816 | Status = FindVariableInRuntimeCache (VariableName, VendorGuid, Attributes, DataSize, Data);\r | |
817 | } else {\r | |
818 | Status = FindVariableInSmm (VariableName, VendorGuid, Attributes, DataSize, Data);\r | |
819 | }\r | |
820 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
821 | \r | |
822 | return Status;\r | |
823 | }\r | |
8a2d4996 | 824 | \r |
825 | /**\r | |
6f9838f3 | 826 | Finds the next available variable in a runtime cache variable store.\r |
8a2d4996 | 827 | \r |
828 | @param[in, out] VariableNameSize Size of the variable name.\r | |
829 | @param[in, out] VariableName Pointer to variable name.\r | |
830 | @param[in, out] VendorGuid Variable Vendor Guid.\r | |
831 | \r | |
832 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
833 | @retval EFI_SUCCESS Find the specified variable.\r | |
834 | @retval EFI_NOT_FOUND Not found.\r | |
835 | @retval EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r | |
836 | \r | |
837 | **/\r | |
838 | EFI_STATUS\r | |
6f9838f3 MK |
839 | GetNextVariableNameInRuntimeCache (\r |
840 | IN OUT UINTN *VariableNameSize,\r | |
841 | IN OUT CHAR16 *VariableName,\r | |
842 | IN OUT EFI_GUID *VendorGuid\r | |
843 | )\r | |
844 | {\r | |
845 | EFI_STATUS Status;\r | |
846 | UINTN VarNameSize;\r | |
847 | VARIABLE_HEADER *VariablePtr;\r | |
848 | VARIABLE_STORE_HEADER *VariableStoreHeader[VariableStoreTypeMax];\r | |
849 | \r | |
850 | Status = EFI_NOT_FOUND;\r | |
851 | \r | |
852 | //\r | |
853 | // The UEFI specification restricts Runtime Services callers from invoking the same or certain other Runtime Service\r | |
854 | // functions prior to completion and return from a previous Runtime Service call. These restrictions prevent\r | |
855 | // a GetVariable () or GetNextVariable () call from being issued until a prior call has returned. The runtime\r | |
856 | // cache read lock should always be free when entering this function.\r | |
857 | //\r | |
858 | ASSERT (!mVariableRuntimeCacheReadLock);\r | |
859 | \r | |
860 | CheckForRuntimeCacheSync ();\r | |
861 | \r | |
862 | mVariableRuntimeCacheReadLock = TRUE;\r | |
863 | if (!mVariableRuntimeCachePendingUpdate) {\r | |
864 | //\r | |
865 | // 0: Volatile, 1: HOB, 2: Non-Volatile.\r | |
866 | // The index and attributes mapping must be kept in this order as FindVariable\r | |
867 | // makes use of this mapping to implement search algorithm.\r | |
868 | //\r | |
869 | VariableStoreHeader[VariableStoreTypeVolatile] = mVariableRuntimeVolatileCacheBuffer;\r | |
870 | VariableStoreHeader[VariableStoreTypeHob] = mVariableRuntimeHobCacheBuffer;\r | |
871 | VariableStoreHeader[VariableStoreTypeNv] = mVariableRuntimeNvCacheBuffer;\r | |
872 | \r | |
873 | Status = VariableServiceGetNextVariableInternal (\r | |
874 | VariableName,\r | |
875 | VendorGuid,\r | |
876 | VariableStoreHeader,\r | |
877 | &VariablePtr,\r | |
878 | mVariableAuthFormat\r | |
879 | );\r | |
880 | if (!EFI_ERROR (Status)) {\r | |
881 | VarNameSize = NameSizeOfVariable (VariablePtr, mVariableAuthFormat);\r | |
882 | ASSERT (VarNameSize != 0);\r | |
883 | if (VarNameSize <= *VariableNameSize) {\r | |
884 | CopyMem (VariableName, GetVariableNamePtr (VariablePtr, mVariableAuthFormat), VarNameSize);\r | |
885 | CopyMem (VendorGuid, GetVendorGuidPtr (VariablePtr, mVariableAuthFormat), sizeof (EFI_GUID));\r | |
886 | Status = EFI_SUCCESS;\r | |
887 | } else {\r | |
888 | Status = EFI_BUFFER_TOO_SMALL;\r | |
889 | }\r | |
890 | \r | |
891 | *VariableNameSize = VarNameSize;\r | |
892 | }\r | |
893 | }\r | |
894 | mVariableRuntimeCacheReadLock = FALSE;\r | |
895 | \r | |
896 | return Status;\r | |
897 | }\r | |
898 | \r | |
899 | /**\r | |
900 | Finds the next available variable in a SMM variable store.\r | |
901 | \r | |
902 | @param[in, out] VariableNameSize Size of the variable name.\r | |
903 | @param[in, out] VariableName Pointer to variable name.\r | |
904 | @param[in, out] VendorGuid Variable Vendor Guid.\r | |
905 | \r | |
906 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
907 | @retval EFI_SUCCESS Find the specified variable.\r | |
908 | @retval EFI_NOT_FOUND Not found.\r | |
909 | @retval EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r | |
910 | \r | |
911 | **/\r | |
912 | EFI_STATUS\r | |
913 | GetNextVariableNameInSmm (\r | |
8a2d4996 | 914 | IN OUT UINTN *VariableNameSize,\r |
915 | IN OUT CHAR16 *VariableName,\r | |
916 | IN OUT EFI_GUID *VendorGuid\r | |
917 | )\r | |
918 | {\r | |
919 | EFI_STATUS Status;\r | |
920 | UINTN PayloadSize;\r | |
921 | SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME *SmmGetNextVariableName;\r | |
9d00d20e SZ |
922 | UINTN OutVariableNameSize;\r |
923 | UINTN InVariableNameSize;\r | |
8a2d4996 | 924 | \r |
9d00d20e SZ |
925 | OutVariableNameSize = *VariableNameSize;\r |
926 | InVariableNameSize = StrSize (VariableName);\r | |
4e1005ec | 927 | SmmGetNextVariableName = NULL;\r |
0c55190f | 928 | \r |
929 | //\r | |
930 | // If input string exceeds SMM payload limit. Return failure\r | |
931 | //\r | |
5e5bb2a9 | 932 | if (InVariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name)) {\r |
3588bb35 SZ |
933 | return EFI_INVALID_PARAMETER;\r |
934 | }\r | |
935 | \r | |
8a2d4996 | 936 | //\r |
937 | // Init the communicate buffer. The buffer data size is:\r | |
938 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize.\r | |
939 | //\r | |
5e5bb2a9 | 940 | if (OutVariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name)) {\r |
0c55190f | 941 | //\r |
942 | // If output buffer exceed SMM payload limit. Trim output buffer to SMM payload size\r | |
943 | //\r | |
5e5bb2a9 | 944 | OutVariableNameSize = mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name);\r |
0c55190f | 945 | }\r |
946 | //\r | |
947 | // Payload should be Guid + NameSize + MAX of Input & Output buffer\r | |
948 | //\r | |
9d00d20e | 949 | PayloadSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name) + MAX (OutVariableNameSize, InVariableNameSize);\r |
0c55190f | 950 | \r |
5c7fa429 | 951 | Status = InitCommunicateBuffer ((VOID **)&SmmGetNextVariableName, PayloadSize, SMM_VARIABLE_FUNCTION_GET_NEXT_VARIABLE_NAME);\r |
8a2d4996 | 952 | if (EFI_ERROR (Status)) {\r |
6ed1ec59 | 953 | goto Done;\r |
8a2d4996 | 954 | }\r |
955 | ASSERT (SmmGetNextVariableName != NULL);\r | |
956 | \r | |
0c55190f | 957 | //\r |
958 | // SMM comm buffer->NameSize is buffer size for return string\r | |
959 | //\r | |
9d00d20e | 960 | SmmGetNextVariableName->NameSize = OutVariableNameSize;\r |
0c55190f | 961 | \r |
8a2d4996 | 962 | CopyGuid (&SmmGetNextVariableName->Guid, VendorGuid);\r |
0c55190f | 963 | //\r |
964 | // Copy whole string\r | |
965 | //\r | |
9d00d20e SZ |
966 | CopyMem (SmmGetNextVariableName->Name, VariableName, InVariableNameSize);\r |
967 | if (OutVariableNameSize > InVariableNameSize) {\r | |
968 | ZeroMem ((UINT8 *) SmmGetNextVariableName->Name + InVariableNameSize, OutVariableNameSize - InVariableNameSize);\r | |
969 | }\r | |
8a2d4996 | 970 | \r |
971 | //\r | |
972 | // Send data to SMM\r | |
973 | //\r | |
974 | Status = SendCommunicateBuffer (PayloadSize);\r | |
975 | \r | |
976 | //\r | |
977 | // Get data from SMM.\r | |
978 | //\r | |
9d00d20e SZ |
979 | if (Status == EFI_SUCCESS || Status == EFI_BUFFER_TOO_SMALL) {\r |
980 | //\r | |
981 | // SMM CommBuffer NameSize can be a trimed value\r | |
982 | // Only update VariableNameSize when needed\r | |
983 | //\r | |
984 | *VariableNameSize = SmmGetNextVariableName->NameSize;\r | |
985 | }\r | |
8a2d4996 | 986 | if (EFI_ERROR (Status)) {\r |
6ed1ec59 | 987 | goto Done;\r |
8a2d4996 | 988 | }\r |
fa0737a8 | 989 | \r |
8a2d4996 | 990 | CopyGuid (VendorGuid, &SmmGetNextVariableName->Guid);\r |
fa0737a8 | 991 | CopyMem (VariableName, SmmGetNextVariableName->Name, SmmGetNextVariableName->NameSize);\r |
8a2d4996 | 992 | \r |
6ed1ec59 | 993 | Done:\r |
6f9838f3 MK |
994 | return Status;\r |
995 | }\r | |
996 | \r | |
997 | /**\r | |
998 | This code Finds the Next available variable.\r | |
999 | \r | |
1000 | @param[in, out] VariableNameSize Size of the variable name.\r | |
1001 | @param[in, out] VariableName Pointer to variable name.\r | |
1002 | @param[in, out] VendorGuid Variable Vendor Guid.\r | |
1003 | \r | |
1004 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
1005 | @retval EFI_SUCCESS Find the specified variable.\r | |
1006 | @retval EFI_NOT_FOUND Not found.\r | |
1007 | @retval EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r | |
1008 | \r | |
1009 | **/\r | |
1010 | EFI_STATUS\r | |
1011 | EFIAPI\r | |
1012 | RuntimeServiceGetNextVariableName (\r | |
1013 | IN OUT UINTN *VariableNameSize,\r | |
1014 | IN OUT CHAR16 *VariableName,\r | |
1015 | IN OUT EFI_GUID *VendorGuid\r | |
1016 | )\r | |
1017 | {\r | |
1018 | EFI_STATUS Status;\r | |
1019 | UINTN MaxLen;\r | |
1020 | \r | |
1021 | Status = EFI_NOT_FOUND;\r | |
1022 | \r | |
1023 | if (VariableNameSize == NULL || VariableName == NULL || VendorGuid == NULL) {\r | |
1024 | return EFI_INVALID_PARAMETER;\r | |
1025 | }\r | |
1026 | \r | |
1027 | //\r | |
1028 | // Calculate the possible maximum length of name string, including the Null terminator.\r | |
1029 | //\r | |
1030 | MaxLen = *VariableNameSize / sizeof (CHAR16);\r | |
1031 | if ((MaxLen == 0) || (StrnLenS (VariableName, MaxLen) == MaxLen)) {\r | |
1032 | //\r | |
1033 | // Null-terminator is not found in the first VariableNameSize bytes of the input VariableName buffer,\r | |
1034 | // follow spec to return EFI_INVALID_PARAMETER.\r | |
1035 | //\r | |
1036 | return EFI_INVALID_PARAMETER;\r | |
1037 | }\r | |
1038 | \r | |
1039 | AcquireLockOnlyAtBootTime (&mVariableServicesLock);\r | |
1040 | if (FeaturePcdGet (PcdEnableVariableRuntimeCache)) {\r | |
1041 | Status = GetNextVariableNameInRuntimeCache (VariableNameSize, VariableName, VendorGuid);\r | |
1042 | } else {\r | |
1043 | Status = GetNextVariableNameInSmm (VariableNameSize, VariableName, VendorGuid);\r | |
1044 | }\r | |
6ed1ec59 | 1045 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r |
6f9838f3 | 1046 | \r |
8a2d4996 | 1047 | return Status;\r |
1048 | }\r | |
1049 | \r | |
1050 | /**\r | |
1051 | This code sets variable in storage blocks (Volatile or Non-Volatile).\r | |
1052 | \r | |
18a7dbbc SZ |
1053 | Caution: This function may receive untrusted input.\r |
1054 | The data size and data are external input, so this function will validate it carefully to avoid buffer overflow.\r | |
1055 | \r | |
8a2d4996 | 1056 | @param[in] VariableName Name of Variable to be found.\r |
1057 | @param[in] VendorGuid Variable vendor GUID.\r | |
1058 | @param[in] Attributes Attribute value of the variable found\r | |
1059 | @param[in] DataSize Size of Data found. If size is less than the\r | |
1060 | data, this value contains the required size.\r | |
1061 | @param[in] Data Data pointer.\r | |
1062 | \r | |
1063 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
1064 | @retval EFI_SUCCESS Set successfully.\r | |
1065 | @retval EFI_OUT_OF_RESOURCES Resource not enough to set variable.\r | |
1066 | @retval EFI_NOT_FOUND Not found.\r | |
1067 | @retval EFI_WRITE_PROTECTED Variable is read-only.\r | |
1068 | \r | |
1069 | **/\r | |
1070 | EFI_STATUS\r | |
1071 | EFIAPI\r | |
1072 | RuntimeServiceSetVariable (\r | |
1073 | IN CHAR16 *VariableName,\r | |
1074 | IN EFI_GUID *VendorGuid,\r | |
1075 | IN UINT32 Attributes,\r | |
1076 | IN UINTN DataSize,\r | |
1077 | IN VOID *Data\r | |
1078 | )\r | |
1079 | {\r | |
1080 | EFI_STATUS Status;\r | |
fa0737a8 | 1081 | UINTN PayloadSize;\r |
8a2d4996 | 1082 | SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE *SmmVariableHeader;\r |
9d00d20e | 1083 | UINTN VariableNameSize;\r |
fa0737a8 | 1084 | \r |
8a2d4996 | 1085 | //\r |
1086 | // Check input parameters.\r | |
1087 | //\r | |
1088 | if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {\r | |
1089 | return EFI_INVALID_PARAMETER;\r | |
fa0737a8 | 1090 | }\r |
8a2d4996 | 1091 | \r |
1092 | if (DataSize != 0 && Data == NULL) {\r | |
1093 | return EFI_INVALID_PARAMETER;\r | |
1094 | }\r | |
6ed1ec59 | 1095 | \r |
9d00d20e | 1096 | VariableNameSize = StrSize (VariableName);\r |
4e1005ec | 1097 | SmmVariableHeader = NULL;\r |
3588bb35 | 1098 | \r |
5e5bb2a9 SZ |
1099 | //\r |
1100 | // If VariableName or DataSize exceeds SMM payload limit. Return failure\r | |
1101 | //\r | |
1102 | if ((VariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name)) ||\r | |
1103 | (DataSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) - VariableNameSize)){\r | |
56251c66 | 1104 | return EFI_INVALID_PARAMETER;\r |
1105 | }\r | |
1106 | \r | |
6ed1ec59 | 1107 | AcquireLockOnlyAtBootTime(&mVariableServicesLock);\r |
fa0737a8 | 1108 | \r |
8a2d4996 | 1109 | //\r |
1110 | // Init the communicate buffer. The buffer data size is:\r | |
1111 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize.\r | |
1112 | //\r | |
9d00d20e | 1113 | PayloadSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) + VariableNameSize + DataSize;\r |
5c7fa429 | 1114 | Status = InitCommunicateBuffer ((VOID **)&SmmVariableHeader, PayloadSize, SMM_VARIABLE_FUNCTION_SET_VARIABLE);\r |
8a2d4996 | 1115 | if (EFI_ERROR (Status)) {\r |
6ed1ec59 | 1116 | goto Done;\r |
8a2d4996 | 1117 | }\r |
1118 | ASSERT (SmmVariableHeader != NULL);\r | |
1119 | \r | |
1120 | CopyGuid ((EFI_GUID *) &SmmVariableHeader->Guid, VendorGuid);\r | |
1121 | SmmVariableHeader->DataSize = DataSize;\r | |
9d00d20e | 1122 | SmmVariableHeader->NameSize = VariableNameSize;\r |
8a2d4996 | 1123 | SmmVariableHeader->Attributes = Attributes;\r |
1124 | CopyMem (SmmVariableHeader->Name, VariableName, SmmVariableHeader->NameSize);\r | |
1125 | CopyMem ((UINT8 *) SmmVariableHeader->Name + SmmVariableHeader->NameSize, Data, DataSize);\r | |
1126 | \r | |
1127 | //\r | |
1128 | // Send data to SMM.\r | |
1129 | //\r | |
1130 | Status = SendCommunicateBuffer (PayloadSize);\r | |
6ed1ec59 SZ |
1131 | \r |
1132 | Done:\r | |
1133 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
fa0737a8 SZ |
1134 | \r |
1135 | if (!EfiAtRuntime ()) {\r | |
1136 | if (!EFI_ERROR (Status)) {\r | |
1137 | SecureBootHook (\r | |
1138 | VariableName,\r | |
1139 | VendorGuid\r | |
1140 | );\r | |
1141 | }\r | |
1142 | }\r | |
8a2d4996 | 1143 | return Status;\r |
1144 | }\r | |
1145 | \r | |
1146 | \r | |
1147 | /**\r | |
1148 | This code returns information about the EFI variables.\r | |
1149 | \r | |
1150 | @param[in] Attributes Attributes bitmask to specify the type of variables\r | |
1151 | on which to return information.\r | |
1152 | @param[out] MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r | |
1153 | for the EFI variables associated with the attributes specified.\r | |
1154 | @param[out] RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r | |
1155 | for EFI variables associated with the attributes specified.\r | |
1156 | @param[out] MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r | |
1157 | associated with the attributes specified.\r | |
1158 | \r | |
1159 | @retval EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.\r | |
1160 | @retval EFI_SUCCESS Query successfully.\r | |
1161 | @retval EFI_UNSUPPORTED The attribute is not supported on this platform.\r | |
1162 | \r | |
1163 | **/\r | |
1164 | EFI_STATUS\r | |
1165 | EFIAPI\r | |
1166 | RuntimeServiceQueryVariableInfo (\r | |
1167 | IN UINT32 Attributes,\r | |
1168 | OUT UINT64 *MaximumVariableStorageSize,\r | |
1169 | OUT UINT64 *RemainingVariableStorageSize,\r | |
1170 | OUT UINT64 *MaximumVariableSize\r | |
1171 | )\r | |
1172 | {\r | |
1173 | EFI_STATUS Status;\r | |
1174 | UINTN PayloadSize;\r | |
1175 | SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO *SmmQueryVariableInfo;\r | |
1176 | \r | |
4e1005ec ED |
1177 | SmmQueryVariableInfo = NULL;\r |
1178 | \r | |
8a2d4996 | 1179 | if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL || Attributes == 0) {\r |
1180 | return EFI_INVALID_PARAMETER;\r | |
1181 | }\r | |
6ed1ec59 SZ |
1182 | \r |
1183 | AcquireLockOnlyAtBootTime(&mVariableServicesLock);\r | |
1184 | \r | |
8a2d4996 | 1185 | //\r |
1186 | // Init the communicate buffer. The buffer data size is:\r | |
1187 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize;\r | |
1188 | //\r | |
d00ed85e | 1189 | PayloadSize = sizeof (SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO);\r |
5c7fa429 | 1190 | Status = InitCommunicateBuffer ((VOID **)&SmmQueryVariableInfo, PayloadSize, SMM_VARIABLE_FUNCTION_QUERY_VARIABLE_INFO);\r |
8a2d4996 | 1191 | if (EFI_ERROR (Status)) {\r |
6ed1ec59 | 1192 | goto Done;\r |
8a2d4996 | 1193 | }\r |
1194 | ASSERT (SmmQueryVariableInfo != NULL);\r | |
1195 | \r | |
1196 | SmmQueryVariableInfo->Attributes = Attributes;\r | |
1197 | \r | |
1198 | //\r | |
1199 | // Send data to SMM.\r | |
1200 | //\r | |
1201 | Status = SendCommunicateBuffer (PayloadSize);\r | |
1202 | if (EFI_ERROR (Status)) {\r | |
6ed1ec59 | 1203 | goto Done;\r |
8a2d4996 | 1204 | }\r |
1205 | \r | |
1206 | //\r | |
1207 | // Get data from SMM.\r | |
1208 | //\r | |
1209 | *MaximumVariableSize = SmmQueryVariableInfo->MaximumVariableSize;\r | |
1210 | *MaximumVariableStorageSize = SmmQueryVariableInfo->MaximumVariableStorageSize;\r | |
fa0737a8 | 1211 | *RemainingVariableStorageSize = SmmQueryVariableInfo->RemainingVariableStorageSize;\r |
6ed1ec59 SZ |
1212 | \r |
1213 | Done:\r | |
1214 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
aab9212f | 1215 | return Status;\r |
8a2d4996 | 1216 | }\r |
1217 | \r | |
1218 | \r | |
1219 | /**\r | |
1220 | Exit Boot Services Event notification handler.\r | |
1221 | \r | |
1222 | Notify SMM variable driver about the event.\r | |
1223 | \r | |
1224 | @param[in] Event Event whose notification function is being invoked.\r | |
1225 | @param[in] Context Pointer to the notification function's context.\r | |
1226 | \r | |
1227 | **/\r | |
1228 | VOID\r | |
1229 | EFIAPI\r | |
1230 | OnExitBootServices (\r | |
1231 | IN EFI_EVENT Event,\r | |
1232 | IN VOID *Context\r | |
1233 | )\r | |
1234 | {\r | |
1235 | //\r | |
1236 | // Init the communicate buffer. The buffer data size is:\r | |
1237 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE.\r | |
1238 | //\r | |
fa0737a8 | 1239 | InitCommunicateBuffer (NULL, 0, SMM_VARIABLE_FUNCTION_EXIT_BOOT_SERVICE);\r |
8a2d4996 | 1240 | \r |
1241 | //\r | |
1242 | // Send data to SMM.\r | |
1243 | //\r | |
1244 | SendCommunicateBuffer (0);\r | |
1245 | }\r | |
1246 | \r | |
1247 | \r | |
1248 | /**\r | |
1249 | On Ready To Boot Services Event notification handler.\r | |
1250 | \r | |
1251 | Notify SMM variable driver about the event.\r | |
1252 | \r | |
1253 | @param[in] Event Event whose notification function is being invoked\r | |
1254 | @param[in] Context Pointer to the notification function's context\r | |
1255 | \r | |
1256 | **/\r | |
1257 | VOID\r | |
1258 | EFIAPI\r | |
1259 | OnReadyToBoot (\r | |
1260 | IN EFI_EVENT Event,\r | |
1261 | IN VOID *Context\r | |
1262 | )\r | |
1263 | {\r | |
1264 | //\r | |
1265 | // Init the communicate buffer. The buffer data size is:\r | |
1266 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE.\r | |
1267 | //\r | |
1268 | InitCommunicateBuffer (NULL, 0, SMM_VARIABLE_FUNCTION_READY_TO_BOOT);\r | |
fa0737a8 | 1269 | \r |
8a2d4996 | 1270 | //\r |
1271 | // Send data to SMM.\r | |
1272 | //\r | |
1273 | SendCommunicateBuffer (0);\r | |
fa0737a8 | 1274 | \r |
aab3b9b9 MK |
1275 | //\r |
1276 | // Install the system configuration table for variable info data captured\r | |
1277 | //\r | |
1278 | if (FeaturePcdGet (PcdEnableVariableRuntimeCache) && FeaturePcdGet (PcdVariableCollectStatistics)) {\r | |
1279 | if (mVariableAuthFormat) {\r | |
1280 | gBS->InstallConfigurationTable (&gEfiAuthenticatedVariableGuid, mVariableInfo);\r | |
1281 | } else {\r | |
1282 | gBS->InstallConfigurationTable (&gEfiVariableGuid, mVariableInfo);\r | |
1283 | }\r | |
1284 | }\r | |
1285 | \r | |
fa0737a8 | 1286 | gBS->CloseEvent (Event);\r |
8a2d4996 | 1287 | }\r |
1288 | \r | |
1289 | \r | |
1290 | /**\r | |
1291 | Notification function of EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE.\r | |
1292 | \r | |
1293 | This is a notification function registered on EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r | |
1294 | It convers pointer to new virtual address.\r | |
1295 | \r | |
1296 | @param[in] Event Event whose notification function is being invoked.\r | |
1297 | @param[in] Context Pointer to the notification function's context.\r | |
1298 | \r | |
1299 | **/\r | |
1300 | VOID\r | |
1301 | EFIAPI\r | |
1302 | VariableAddressChangeEvent (\r | |
1303 | IN EFI_EVENT Event,\r | |
1304 | IN VOID *Context\r | |
1305 | )\r | |
1306 | {\r | |
1307 | EfiConvertPointer (0x0, (VOID **) &mVariableBuffer);\r | |
1308 | EfiConvertPointer (0x0, (VOID **) &mSmmCommunication);\r | |
aab3b9b9 MK |
1309 | EfiConvertPointer (EFI_OPTIONAL_PTR, (VOID **) &mVariableRuntimeHobCacheBuffer);\r |
1310 | EfiConvertPointer (EFI_OPTIONAL_PTR, (VOID **) &mVariableRuntimeNvCacheBuffer);\r | |
1311 | EfiConvertPointer (EFI_OPTIONAL_PTR, (VOID **) &mVariableRuntimeVolatileCacheBuffer);\r | |
8a2d4996 | 1312 | }\r |
1313 | \r | |
fa0737a8 SZ |
1314 | /**\r |
1315 | This code gets variable payload size.\r | |
1316 | \r | |
1317 | @param[out] VariablePayloadSize Output pointer to variable payload size.\r | |
1318 | \r | |
1319 | @retval EFI_SUCCESS Get successfully.\r | |
1320 | @retval Others Get unsuccessfully.\r | |
1321 | \r | |
1322 | **/\r | |
1323 | EFI_STATUS\r | |
1324 | EFIAPI\r | |
1325 | GetVariablePayloadSize (\r | |
1326 | OUT UINTN *VariablePayloadSize\r | |
1327 | )\r | |
1328 | {\r | |
1329 | EFI_STATUS Status;\r | |
1330 | SMM_VARIABLE_COMMUNICATE_GET_PAYLOAD_SIZE *SmmGetPayloadSize;\r | |
1331 | EFI_SMM_COMMUNICATE_HEADER *SmmCommunicateHeader;\r | |
1332 | SMM_VARIABLE_COMMUNICATE_HEADER *SmmVariableFunctionHeader;\r | |
1333 | UINTN CommSize;\r | |
1334 | UINT8 *CommBuffer;\r | |
1335 | \r | |
1336 | SmmGetPayloadSize = NULL;\r | |
1337 | CommBuffer = NULL;\r | |
1338 | \r | |
1339 | if(VariablePayloadSize == NULL) {\r | |
1340 | return EFI_INVALID_PARAMETER;\r | |
1341 | }\r | |
1342 | \r | |
1343 | AcquireLockOnlyAtBootTime(&mVariableServicesLock);\r | |
1344 | \r | |
1345 | //\r | |
1346 | // Init the communicate buffer. The buffer data size is:\r | |
1347 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + sizeof (SMM_VARIABLE_COMMUNICATE_GET_PAYLOAD_SIZE);\r | |
1348 | //\r | |
1349 | CommSize = SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + sizeof (SMM_VARIABLE_COMMUNICATE_GET_PAYLOAD_SIZE);\r | |
1350 | CommBuffer = AllocateZeroPool (CommSize);\r | |
1351 | if (CommBuffer == NULL) {\r | |
1352 | Status = EFI_OUT_OF_RESOURCES;\r | |
1353 | goto Done;\r | |
1354 | }\r | |
1355 | \r | |
1356 | SmmCommunicateHeader = (EFI_SMM_COMMUNICATE_HEADER *) CommBuffer;\r | |
1357 | CopyGuid (&SmmCommunicateHeader->HeaderGuid, &gEfiSmmVariableProtocolGuid);\r | |
1358 | SmmCommunicateHeader->MessageLength = SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + sizeof (SMM_VARIABLE_COMMUNICATE_GET_PAYLOAD_SIZE);\r | |
1359 | \r | |
1360 | SmmVariableFunctionHeader = (SMM_VARIABLE_COMMUNICATE_HEADER *) SmmCommunicateHeader->Data;\r | |
1361 | SmmVariableFunctionHeader->Function = SMM_VARIABLE_FUNCTION_GET_PAYLOAD_SIZE;\r | |
1362 | SmmGetPayloadSize = (SMM_VARIABLE_COMMUNICATE_GET_PAYLOAD_SIZE *) SmmVariableFunctionHeader->Data;\r | |
1363 | \r | |
1364 | //\r | |
1365 | // Send data to SMM.\r | |
1366 | //\r | |
1367 | Status = mSmmCommunication->Communicate (mSmmCommunication, CommBuffer, &CommSize);\r | |
1368 | ASSERT_EFI_ERROR (Status);\r | |
1369 | \r | |
1370 | Status = SmmVariableFunctionHeader->ReturnStatus;\r | |
1371 | if (EFI_ERROR (Status)) {\r | |
1372 | goto Done;\r | |
1373 | }\r | |
1374 | \r | |
1375 | //\r | |
1376 | // Get data from SMM.\r | |
1377 | //\r | |
1378 | *VariablePayloadSize = SmmGetPayloadSize->VariablePayloadSize;\r | |
1379 | \r | |
1380 | Done:\r | |
1381 | if (CommBuffer != NULL) {\r | |
1382 | FreePool (CommBuffer);\r | |
1383 | }\r | |
1384 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
1385 | return Status;\r | |
1386 | }\r | |
8a2d4996 | 1387 | \r |
aab3b9b9 MK |
1388 | /**\r |
1389 | This code gets information needed from SMM for runtime cache initialization.\r | |
1390 | \r | |
1391 | @param[out] TotalHobStorageSize Output pointer for the total HOB storage size in bytes.\r | |
1392 | @param[out] TotalNvStorageSize Output pointer for the total non-volatile storage size in bytes.\r | |
1393 | @param[out] TotalVolatileStorageSize Output pointer for the total volatile storage size in bytes.\r | |
1394 | @param[out] AuthenticatedVariableUsage Output pointer that indicates if authenticated variables are to be used.\r | |
1395 | \r | |
1396 | @retval EFI_SUCCESS Retrieved the size successfully.\r | |
1397 | @retval EFI_INVALID_PARAMETER TotalNvStorageSize parameter is NULL.\r | |
1398 | @retval EFI_OUT_OF_RESOURCES The memory resources needed for a CommBuffer are not available.\r | |
1399 | @retval Others Could not retrieve the size successfully.\r | |
1400 | \r | |
1401 | **/\r | |
1402 | EFI_STATUS\r | |
1403 | GetRuntimeCacheInfo (\r | |
1404 | OUT UINTN *TotalHobStorageSize,\r | |
1405 | OUT UINTN *TotalNvStorageSize,\r | |
1406 | OUT UINTN *TotalVolatileStorageSize,\r | |
1407 | OUT BOOLEAN *AuthenticatedVariableUsage\r | |
1408 | )\r | |
1409 | {\r | |
1410 | EFI_STATUS Status;\r | |
1411 | SMM_VARIABLE_COMMUNICATE_GET_RUNTIME_CACHE_INFO *SmmGetRuntimeCacheInfo;\r | |
1412 | EFI_SMM_COMMUNICATE_HEADER *SmmCommunicateHeader;\r | |
1413 | SMM_VARIABLE_COMMUNICATE_HEADER *SmmVariableFunctionHeader;\r | |
1414 | UINTN CommSize;\r | |
1415 | UINT8 *CommBuffer;\r | |
1416 | \r | |
1417 | SmmGetRuntimeCacheInfo = NULL;\r | |
1418 | CommBuffer = mVariableBuffer;\r | |
1419 | \r | |
1420 | if (TotalHobStorageSize == NULL || TotalNvStorageSize == NULL || TotalVolatileStorageSize == NULL || AuthenticatedVariableUsage == NULL) {\r | |
1421 | return EFI_INVALID_PARAMETER;\r | |
1422 | }\r | |
1423 | \r | |
1424 | if (CommBuffer == NULL) {\r | |
1425 | return EFI_OUT_OF_RESOURCES;\r | |
1426 | }\r | |
1427 | \r | |
1428 | AcquireLockOnlyAtBootTime (&mVariableServicesLock);\r | |
1429 | \r | |
1430 | CommSize = SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + sizeof (SMM_VARIABLE_COMMUNICATE_GET_RUNTIME_CACHE_INFO);\r | |
1431 | ZeroMem (CommBuffer, CommSize);\r | |
1432 | \r | |
1433 | SmmCommunicateHeader = (EFI_SMM_COMMUNICATE_HEADER *) CommBuffer;\r | |
1434 | CopyGuid (&SmmCommunicateHeader->HeaderGuid, &gEfiSmmVariableProtocolGuid);\r | |
1435 | SmmCommunicateHeader->MessageLength = SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + sizeof (SMM_VARIABLE_COMMUNICATE_GET_RUNTIME_CACHE_INFO);\r | |
1436 | \r | |
1437 | SmmVariableFunctionHeader = (SMM_VARIABLE_COMMUNICATE_HEADER *) SmmCommunicateHeader->Data;\r | |
1438 | SmmVariableFunctionHeader->Function = SMM_VARIABLE_FUNCTION_GET_RUNTIME_CACHE_INFO;\r | |
1439 | SmmGetRuntimeCacheInfo = (SMM_VARIABLE_COMMUNICATE_GET_RUNTIME_CACHE_INFO *) SmmVariableFunctionHeader->Data;\r | |
1440 | \r | |
1441 | //\r | |
1442 | // Send data to SMM.\r | |
1443 | //\r | |
1444 | Status = mSmmCommunication->Communicate (mSmmCommunication, CommBuffer, &CommSize);\r | |
1445 | ASSERT_EFI_ERROR (Status);\r | |
1446 | if (CommSize <= SMM_VARIABLE_COMMUNICATE_HEADER_SIZE) {\r | |
1447 | Status = EFI_BAD_BUFFER_SIZE;\r | |
1448 | goto Done;\r | |
1449 | }\r | |
1450 | \r | |
1451 | Status = SmmVariableFunctionHeader->ReturnStatus;\r | |
1452 | if (EFI_ERROR (Status)) {\r | |
1453 | goto Done;\r | |
1454 | }\r | |
1455 | \r | |
1456 | //\r | |
1457 | // Get data from SMM.\r | |
1458 | //\r | |
1459 | *TotalHobStorageSize = SmmGetRuntimeCacheInfo->TotalHobStorageSize;\r | |
1460 | *TotalNvStorageSize = SmmGetRuntimeCacheInfo->TotalNvStorageSize;\r | |
1461 | *TotalVolatileStorageSize = SmmGetRuntimeCacheInfo->TotalVolatileStorageSize;\r | |
1462 | *AuthenticatedVariableUsage = SmmGetRuntimeCacheInfo->AuthenticatedVariableUsage;\r | |
1463 | \r | |
1464 | Done:\r | |
1465 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
1466 | return Status;\r | |
1467 | }\r | |
1468 | \r | |
1469 | /**\r | |
1470 | Sends the runtime variable cache context information to SMM.\r | |
1471 | \r | |
1472 | @retval EFI_SUCCESS Retrieved the size successfully.\r | |
1473 | @retval EFI_INVALID_PARAMETER TotalNvStorageSize parameter is NULL.\r | |
1474 | @retval EFI_OUT_OF_RESOURCES The memory resources needed for a CommBuffer are not available.\r | |
1475 | @retval Others Could not retrieve the size successfully.;\r | |
1476 | \r | |
1477 | **/\r | |
1478 | EFI_STATUS\r | |
1479 | SendRuntimeVariableCacheContextToSmm (\r | |
1480 | VOID\r | |
1481 | )\r | |
1482 | {\r | |
1483 | EFI_STATUS Status;\r | |
1484 | SMM_VARIABLE_COMMUNICATE_RUNTIME_VARIABLE_CACHE_CONTEXT *SmmRuntimeVarCacheContext;\r | |
1485 | EFI_SMM_COMMUNICATE_HEADER *SmmCommunicateHeader;\r | |
1486 | SMM_VARIABLE_COMMUNICATE_HEADER *SmmVariableFunctionHeader;\r | |
1487 | UINTN CommSize;\r | |
1488 | UINT8 *CommBuffer;\r | |
1489 | \r | |
1490 | SmmRuntimeVarCacheContext = NULL;\r | |
1491 | CommBuffer = mVariableBuffer;\r | |
1492 | \r | |
1493 | if (CommBuffer == NULL) {\r | |
1494 | return EFI_OUT_OF_RESOURCES;\r | |
1495 | }\r | |
1496 | \r | |
1497 | AcquireLockOnlyAtBootTime (&mVariableServicesLock);\r | |
1498 | \r | |
1499 | //\r | |
1500 | // Init the communicate buffer. The buffer data size is:\r | |
1501 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + sizeof (SMM_VARIABLE_COMMUNICATE_RUNTIME_VARIABLE_CACHE_CONTEXT);\r | |
1502 | //\r | |
1503 | CommSize = SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + sizeof (SMM_VARIABLE_COMMUNICATE_RUNTIME_VARIABLE_CACHE_CONTEXT);\r | |
1504 | ZeroMem (CommBuffer, CommSize);\r | |
1505 | \r | |
1506 | SmmCommunicateHeader = (EFI_SMM_COMMUNICATE_HEADER *) CommBuffer;\r | |
1507 | CopyGuid (&SmmCommunicateHeader->HeaderGuid, &gEfiSmmVariableProtocolGuid);\r | |
1508 | SmmCommunicateHeader->MessageLength = SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + sizeof (SMM_VARIABLE_COMMUNICATE_RUNTIME_VARIABLE_CACHE_CONTEXT);\r | |
1509 | \r | |
1510 | SmmVariableFunctionHeader = (SMM_VARIABLE_COMMUNICATE_HEADER *) SmmCommunicateHeader->Data;\r | |
1511 | SmmVariableFunctionHeader->Function = SMM_VARIABLE_FUNCTION_INIT_RUNTIME_VARIABLE_CACHE_CONTEXT;\r | |
1512 | SmmRuntimeVarCacheContext = (SMM_VARIABLE_COMMUNICATE_RUNTIME_VARIABLE_CACHE_CONTEXT *) SmmVariableFunctionHeader->Data;\r | |
1513 | \r | |
1514 | SmmRuntimeVarCacheContext->RuntimeHobCache = mVariableRuntimeHobCacheBuffer;\r | |
1515 | SmmRuntimeVarCacheContext->RuntimeVolatileCache = mVariableRuntimeVolatileCacheBuffer;\r | |
1516 | SmmRuntimeVarCacheContext->RuntimeNvCache = mVariableRuntimeNvCacheBuffer;\r | |
1517 | SmmRuntimeVarCacheContext->PendingUpdate = &mVariableRuntimeCachePendingUpdate;\r | |
1518 | SmmRuntimeVarCacheContext->ReadLock = &mVariableRuntimeCacheReadLock;\r | |
1519 | SmmRuntimeVarCacheContext->HobFlushComplete = &mHobFlushComplete;\r | |
1520 | \r | |
1521 | //\r | |
1522 | // Send data to SMM.\r | |
1523 | //\r | |
1524 | Status = mSmmCommunication->Communicate (mSmmCommunication, CommBuffer, &CommSize);\r | |
1525 | ASSERT_EFI_ERROR (Status);\r | |
1526 | if (CommSize <= SMM_VARIABLE_COMMUNICATE_HEADER_SIZE) {\r | |
1527 | Status = EFI_BAD_BUFFER_SIZE;\r | |
1528 | goto Done;\r | |
1529 | }\r | |
1530 | \r | |
1531 | Status = SmmVariableFunctionHeader->ReturnStatus;\r | |
1532 | if (EFI_ERROR (Status)) {\r | |
1533 | goto Done;\r | |
1534 | }\r | |
1535 | \r | |
1536 | Done:\r | |
1537 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
1538 | return Status;\r | |
1539 | }\r | |
1540 | \r | |
8a2d4996 | 1541 | /**\r |
1542 | Initialize variable service and install Variable Architectural protocol.\r | |
1543 | \r | |
1544 | @param[in] Event Event whose notification function is being invoked.\r | |
1545 | @param[in] Context Pointer to the notification function's context.\r | |
fa0737a8 | 1546 | \r |
8a2d4996 | 1547 | **/\r |
1548 | VOID\r | |
1549 | EFIAPI\r | |
1550 | SmmVariableReady (\r | |
1551 | IN EFI_EVENT Event,\r | |
1552 | IN VOID *Context\r | |
1553 | )\r | |
1554 | {\r | |
1555 | EFI_STATUS Status;\r | |
1556 | \r | |
aab3b9b9 | 1557 | Status = gBS->LocateProtocol (&gEfiSmmVariableProtocolGuid, NULL, (VOID **) &mSmmVariable);\r |
8a2d4996 | 1558 | if (EFI_ERROR (Status)) {\r |
1559 | return;\r | |
1560 | }\r | |
fa0737a8 | 1561 | \r |
8a2d4996 | 1562 | Status = gBS->LocateProtocol (&gEfiSmmCommunicationProtocolGuid, NULL, (VOID **) &mSmmCommunication);\r |
1563 | ASSERT_EFI_ERROR (Status);\r | |
fa0737a8 | 1564 | \r |
8a2d4996 | 1565 | //\r |
5e5bb2a9 | 1566 | // Allocate memory for variable communicate buffer.\r |
8a2d4996 | 1567 | //\r |
fa0737a8 SZ |
1568 | Status = GetVariablePayloadSize (&mVariableBufferPayloadSize);\r |
1569 | ASSERT_EFI_ERROR (Status);\r | |
5e5bb2a9 | 1570 | mVariableBufferSize = SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + mVariableBufferPayloadSize;\r |
8a2d4996 | 1571 | mVariableBuffer = AllocateRuntimePool (mVariableBufferSize);\r |
1572 | ASSERT (mVariableBuffer != NULL);\r | |
1573 | \r | |
1574 | //\r | |
1575 | // Save the buffer physical address used for SMM conmunication.\r | |
1576 | //\r | |
1577 | mVariableBufferPhysical = mVariableBuffer;\r | |
1578 | \r | |
aab3b9b9 MK |
1579 | if (FeaturePcdGet (PcdEnableVariableRuntimeCache)) {\r |
1580 | DEBUG ((DEBUG_INFO, "Variable driver runtime cache is enabled.\n"));\r | |
1581 | //\r | |
1582 | // Allocate runtime variable cache memory buffers.\r | |
1583 | //\r | |
1584 | Status = GetRuntimeCacheInfo (\r | |
1585 | &mVariableRuntimeHobCacheBufferSize,\r | |
1586 | &mVariableRuntimeNvCacheBufferSize,\r | |
1587 | &mVariableRuntimeVolatileCacheBufferSize,\r | |
1588 | &mVariableAuthFormat\r | |
1589 | );\r | |
1590 | if (!EFI_ERROR (Status)) {\r | |
1591 | Status = InitVariableCache (&mVariableRuntimeHobCacheBuffer, &mVariableRuntimeHobCacheBufferSize);\r | |
1592 | if (!EFI_ERROR (Status)) {\r | |
1593 | Status = InitVariableCache (&mVariableRuntimeNvCacheBuffer, &mVariableRuntimeNvCacheBufferSize);\r | |
1594 | if (!EFI_ERROR (Status)) {\r | |
1595 | Status = InitVariableCache (&mVariableRuntimeVolatileCacheBuffer, &mVariableRuntimeVolatileCacheBufferSize);\r | |
1596 | if (!EFI_ERROR (Status)) {\r | |
1597 | Status = SendRuntimeVariableCacheContextToSmm ();\r | |
1598 | if (!EFI_ERROR (Status)) {\r | |
1599 | SyncRuntimeCache ();\r | |
1600 | }\r | |
1601 | }\r | |
1602 | }\r | |
1603 | }\r | |
1604 | if (EFI_ERROR (Status)) {\r | |
1605 | mVariableRuntimeHobCacheBuffer = NULL;\r | |
1606 | mVariableRuntimeNvCacheBuffer = NULL;\r | |
1607 | mVariableRuntimeVolatileCacheBuffer = NULL;\r | |
1608 | }\r | |
1609 | }\r | |
1610 | ASSERT_EFI_ERROR (Status);\r | |
1611 | } else {\r | |
1612 | DEBUG ((DEBUG_INFO, "Variable driver runtime cache is disabled.\n"));\r | |
1613 | }\r | |
1614 | \r | |
8a2d4996 | 1615 | gRT->GetVariable = RuntimeServiceGetVariable;\r |
1616 | gRT->GetNextVariableName = RuntimeServiceGetNextVariableName;\r | |
1617 | gRT->SetVariable = RuntimeServiceSetVariable;\r | |
1618 | gRT->QueryVariableInfo = RuntimeServiceQueryVariableInfo;\r | |
fa0737a8 | 1619 | \r |
8a2d4996 | 1620 | //\r |
1621 | // Install the Variable Architectural Protocol on a new handle.\r | |
1622 | //\r | |
1623 | Status = gBS->InstallProtocolInterface (\r | |
1624 | &mHandle,\r | |
fa0737a8 | 1625 | &gEfiVariableArchProtocolGuid,\r |
8a2d4996 | 1626 | EFI_NATIVE_INTERFACE,\r |
1627 | NULL\r | |
1628 | );\r | |
1629 | ASSERT_EFI_ERROR (Status);\r | |
aa2868b3 SZ |
1630 | \r |
1631 | mVariableLock.RequestToLock = VariableLockRequestToLock;\r | |
1632 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
1633 | &mHandle,\r | |
1634 | &gEdkiiVariableLockProtocolGuid,\r | |
1635 | &mVariableLock,\r | |
1636 | NULL\r | |
1637 | );\r | |
1638 | ASSERT_EFI_ERROR (Status);\r | |
1639 | \r | |
1640 | mVarCheck.RegisterSetVariableCheckHandler = VarCheckRegisterSetVariableCheckHandler;\r | |
1641 | mVarCheck.VariablePropertySet = VarCheckVariablePropertySet;\r | |
1642 | mVarCheck.VariablePropertyGet = VarCheckVariablePropertyGet;\r | |
1643 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
1644 | &mHandle,\r | |
1645 | &gEdkiiVarCheckProtocolGuid,\r | |
1646 | &mVarCheck,\r | |
1647 | NULL\r | |
1648 | );\r | |
1649 | ASSERT_EFI_ERROR (Status);\r | |
fa0737a8 SZ |
1650 | \r |
1651 | gBS->CloseEvent (Event);\r | |
8a2d4996 | 1652 | }\r |
1653 | \r | |
1654 | \r | |
1655 | /**\r | |
1656 | SMM Non-Volatile variable write service is ready notify event handler.\r | |
1657 | \r | |
1658 | @param[in] Event Event whose notification function is being invoked.\r | |
1659 | @param[in] Context Pointer to the notification function's context.\r | |
fa0737a8 | 1660 | \r |
8a2d4996 | 1661 | **/\r |
1662 | VOID\r | |
1663 | EFIAPI\r | |
1664 | SmmVariableWriteReady (\r | |
1665 | IN EFI_EVENT Event,\r | |
1666 | IN VOID *Context\r | |
1667 | )\r | |
1668 | {\r | |
1669 | EFI_STATUS Status;\r | |
1670 | VOID *ProtocolOps;\r | |
1671 | \r | |
1672 | //\r | |
1673 | // Check whether the protocol is installed or not.\r | |
1674 | //\r | |
d00ed85e | 1675 | Status = gBS->LocateProtocol (&gSmmVariableWriteGuid, NULL, (VOID **) &ProtocolOps);\r |
8a2d4996 | 1676 | if (EFI_ERROR (Status)) {\r |
1677 | return;\r | |
1678 | }\r | |
fa0737a8 | 1679 | \r |
dc9bd6ed ZC |
1680 | //\r |
1681 | // Some Secure Boot Policy Var (SecureBoot, etc) updates following other\r | |
1682 | // Secure Boot Policy Variable change. Record their initial value.\r | |
1683 | //\r | |
1684 | RecordSecureBootPolicyVarData();\r | |
1685 | \r | |
8a2d4996 | 1686 | Status = gBS->InstallProtocolInterface (\r |
1687 | &mHandle,\r | |
fa0737a8 | 1688 | &gEfiVariableWriteArchProtocolGuid,\r |
8a2d4996 | 1689 | EFI_NATIVE_INTERFACE,\r |
1690 | NULL\r | |
1691 | );\r | |
fa0737a8 SZ |
1692 | ASSERT_EFI_ERROR (Status);\r |
1693 | \r | |
1694 | gBS->CloseEvent (Event);\r | |
8a2d4996 | 1695 | }\r |
1696 | \r | |
1697 | \r | |
1698 | /**\r | |
1699 | Variable Driver main entry point. The Variable driver places the 4 EFI\r | |
fa0737a8 | 1700 | runtime services in the EFI System Table and installs arch protocols\r |
d00ed85e | 1701 | for variable read and write services being available. It also registers\r |
8a2d4996 | 1702 | a notification function for an EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r |
1703 | \r | |
fa0737a8 | 1704 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r |
8a2d4996 | 1705 | @param[in] SystemTable A pointer to the EFI System Table.\r |
fa0737a8 | 1706 | \r |
8a2d4996 | 1707 | @retval EFI_SUCCESS Variable service successfully initialized.\r |
1708 | \r | |
1709 | **/\r | |
1710 | EFI_STATUS\r | |
1711 | EFIAPI\r | |
1712 | VariableSmmRuntimeInitialize (\r | |
1713 | IN EFI_HANDLE ImageHandle,\r | |
1714 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
1715 | )\r | |
1716 | {\r | |
1717 | VOID *SmmVariableRegistration;\r | |
1718 | VOID *SmmVariableWriteRegistration;\r | |
1719 | EFI_EVENT OnReadyToBootEvent;\r | |
1720 | EFI_EVENT ExitBootServiceEvent;\r | |
d3460bcb | 1721 | EFI_EVENT LegacyBootEvent;\r |
6ed1ec59 SZ |
1722 | \r |
1723 | EfiInitializeLock (&mVariableServicesLock, TPL_NOTIFY);\r | |
1724 | \r | |
8a2d4996 | 1725 | //\r |
1726 | // Smm variable service is ready\r | |
1727 | //\r | |
1728 | EfiCreateProtocolNotifyEvent (\r | |
fa0737a8 SZ |
1729 | &gEfiSmmVariableProtocolGuid,\r |
1730 | TPL_CALLBACK,\r | |
1731 | SmmVariableReady,\r | |
1732 | NULL,\r | |
8a2d4996 | 1733 | &SmmVariableRegistration\r |
1734 | );\r | |
1735 | \r | |
1736 | //\r | |
1737 | // Smm Non-Volatile variable write service is ready\r | |
1738 | //\r | |
1739 | EfiCreateProtocolNotifyEvent (\r | |
fa0737a8 SZ |
1740 | &gSmmVariableWriteGuid,\r |
1741 | TPL_CALLBACK,\r | |
1742 | SmmVariableWriteReady,\r | |
1743 | NULL,\r | |
8a2d4996 | 1744 | &SmmVariableWriteRegistration\r |
1745 | );\r | |
1746 | \r | |
1747 | //\r | |
1748 | // Register the event to reclaim variable for OS usage.\r | |
1749 | //\r | |
1750 | EfiCreateEventReadyToBootEx (\r | |
fa0737a8 SZ |
1751 | TPL_NOTIFY,\r |
1752 | OnReadyToBoot,\r | |
1753 | NULL,\r | |
8a2d4996 | 1754 | &OnReadyToBootEvent\r |
fa0737a8 | 1755 | );\r |
8a2d4996 | 1756 | \r |
1757 | //\r | |
1758 | // Register the event to inform SMM variable that it is at runtime.\r | |
1759 | //\r | |
1760 | gBS->CreateEventEx (\r | |
1761 | EVT_NOTIFY_SIGNAL,\r | |
1762 | TPL_NOTIFY,\r | |
1763 | OnExitBootServices,\r | |
1764 | NULL,\r | |
1765 | &gEfiEventExitBootServicesGuid,\r | |
1766 | &ExitBootServiceEvent\r | |
fa0737a8 | 1767 | );\r |
8a2d4996 | 1768 | \r |
d3460bcb SZ |
1769 | //\r |
1770 | // Register the event to inform SMM variable that it is at runtime for legacy boot.\r | |
1771 | // Reuse OnExitBootServices() here.\r | |
1772 | //\r | |
1773 | EfiCreateEventLegacyBootEx(\r | |
1774 | TPL_NOTIFY,\r | |
1775 | OnExitBootServices,\r | |
1776 | NULL,\r | |
1777 | &LegacyBootEvent\r | |
1778 | );\r | |
1779 | \r | |
8a2d4996 | 1780 | //\r |
1781 | // Register the event to convert the pointer for runtime.\r | |
1782 | //\r | |
1783 | gBS->CreateEventEx (\r | |
1784 | EVT_NOTIFY_SIGNAL,\r | |
1785 | TPL_NOTIFY,\r | |
1786 | VariableAddressChangeEvent,\r | |
1787 | NULL,\r | |
1788 | &gEfiEventVirtualAddressChangeGuid,\r | |
1789 | &mVirtualAddressChangeEvent\r | |
1790 | );\r | |
fa0737a8 | 1791 | \r |
8a2d4996 | 1792 | return EFI_SUCCESS;\r |
1793 | }\r | |
1794 | \r |