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8a2d4996 | 1 | /** @file\r |
2 | \r | |
3 | Implement all four UEFI Runtime Variable services for the nonvolatile\r | |
4 | and volatile storage space and install variable architecture protocol\r | |
5 | based on SMM variable module.\r | |
6 | \r | |
18a7dbbc SZ |
7 | Caution: This module requires additional review when modified.\r |
8 | This driver will have external input - variable data.\r | |
9 | This external input must be validated carefully to avoid security issue like\r | |
10 | buffer overflow, integer overflow.\r | |
11 | \r | |
12 | RuntimeServiceGetVariable() and RuntimeServiceSetVariable() are external API\r | |
13 | to receive data buffer. The size should be checked carefully.\r | |
14 | \r | |
15 | InitCommunicateBuffer() is really function to check the variable data size.\r | |
16 | \r | |
4e1005ec | 17 | Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>\r |
8a2d4996 | 18 | This program and the accompanying materials \r |
19 | are licensed and made available under the terms and conditions of the BSD License \r | |
20 | which accompanies this distribution. The full text of the license may be found at \r | |
21 | http://opensource.org/licenses/bsd-license.php \r | |
22 | \r | |
23 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
24 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
25 | \r | |
26 | **/\r | |
d00ed85e | 27 | #include <PiDxe.h>\r |
8a2d4996 | 28 | #include <Protocol/VariableWrite.h>\r |
29 | #include <Protocol/Variable.h>\r | |
30 | #include <Protocol/SmmCommunication.h>\r | |
d00ed85e | 31 | #include <Protocol/SmmVariable.h>\r |
ff843847 | 32 | #include <Protocol/VariableLock.h>\r |
8a2d4996 | 33 | \r |
34 | #include <Library/UefiBootServicesTableLib.h>\r | |
35 | #include <Library/UefiRuntimeServicesTableLib.h>\r | |
36 | #include <Library/MemoryAllocationLib.h>\r | |
37 | #include <Library/UefiDriverEntryPoint.h>\r | |
38 | #include <Library/UefiRuntimeLib.h>\r | |
39 | #include <Library/BaseMemoryLib.h>\r | |
40 | #include <Library/DebugLib.h>\r | |
41 | #include <Library/PcdLib.h>\r | |
42 | #include <Library/UefiLib.h>\r | |
43 | #include <Library/BaseLib.h>\r | |
44 | \r | |
45 | #include <Guid/EventGroup.h>\r | |
d00ed85e | 46 | #include <Guid/VariableFormat.h>\r |
47 | #include <Guid/SmmVariableCommon.h>\r | |
8a2d4996 | 48 | \r |
49 | EFI_HANDLE mHandle = NULL; \r | |
50 | EFI_SMM_VARIABLE_PROTOCOL *mSmmVariable = NULL;\r | |
51 | EFI_EVENT mVirtualAddressChangeEvent = NULL;\r | |
52 | EFI_SMM_COMMUNICATION_PROTOCOL *mSmmCommunication = NULL;\r | |
53 | UINT8 *mVariableBuffer = NULL;\r | |
54 | UINT8 *mVariableBufferPhysical = NULL;\r | |
8a2d4996 | 55 | UINTN mVariableBufferSize;\r |
5e5bb2a9 | 56 | UINTN mVariableBufferPayloadSize;\r |
6ed1ec59 | 57 | EFI_LOCK mVariableServicesLock;\r |
ff843847 | 58 | EDKII_VARIABLE_LOCK_PROTOCOL mVariableLock;\r |
8a2d4996 | 59 | \r |
6ed1ec59 SZ |
60 | /**\r |
61 | Acquires lock only at boot time. Simply returns at runtime.\r | |
62 | \r | |
63 | This is a temperary function that will be removed when\r | |
64 | EfiAcquireLock() in UefiLib can handle the call in UEFI\r | |
65 | Runtimer driver in RT phase.\r | |
66 | It calls EfiAcquireLock() at boot time, and simply returns\r | |
67 | at runtime.\r | |
68 | \r | |
69 | @param Lock A pointer to the lock to acquire.\r | |
70 | \r | |
71 | **/\r | |
72 | VOID\r | |
73 | AcquireLockOnlyAtBootTime (\r | |
74 | IN EFI_LOCK *Lock\r | |
75 | )\r | |
76 | {\r | |
77 | if (!EfiAtRuntime ()) {\r | |
78 | EfiAcquireLock (Lock);\r | |
79 | }\r | |
80 | }\r | |
81 | \r | |
82 | /**\r | |
83 | Releases lock only at boot time. Simply returns at runtime.\r | |
84 | \r | |
85 | This is a temperary function which will be removed when\r | |
86 | EfiReleaseLock() in UefiLib can handle the call in UEFI\r | |
87 | Runtimer driver in RT phase.\r | |
88 | It calls EfiReleaseLock() at boot time and simply returns\r | |
89 | at runtime.\r | |
90 | \r | |
91 | @param Lock A pointer to the lock to release.\r | |
92 | \r | |
93 | **/\r | |
94 | VOID\r | |
95 | ReleaseLockOnlyAtBootTime (\r | |
96 | IN EFI_LOCK *Lock\r | |
97 | )\r | |
98 | {\r | |
99 | if (!EfiAtRuntime ()) {\r | |
100 | EfiReleaseLock (Lock);\r | |
101 | }\r | |
102 | }\r | |
8a2d4996 | 103 | \r |
104 | /**\r | |
105 | Initialize the communicate buffer using DataSize and Function.\r | |
106 | \r | |
107 | The communicate size is: SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE +\r | |
108 | DataSize.\r | |
109 | \r | |
18a7dbbc SZ |
110 | Caution: This function may receive untrusted input.\r |
111 | The data size external input, so this function will validate it carefully to avoid buffer overflow.\r | |
112 | \r | |
8a2d4996 | 113 | @param[out] DataPtr Points to the data in the communicate buffer.\r |
114 | @param[in] DataSize The data size to send to SMM.\r | |
115 | @param[in] Function The function number to initialize the communicate header.\r | |
116 | \r | |
117 | @retval EFI_INVALID_PARAMETER The data size is too big.\r | |
118 | @retval EFI_SUCCESS Find the specified variable.\r | |
119 | \r | |
120 | **/\r | |
121 | EFI_STATUS\r | |
122 | InitCommunicateBuffer (\r | |
123 | OUT VOID **DataPtr OPTIONAL,\r | |
124 | IN UINTN DataSize,\r | |
125 | IN UINTN Function\r | |
126 | )\r | |
127 | {\r | |
128 | EFI_SMM_COMMUNICATE_HEADER *SmmCommunicateHeader; \r | |
129 | SMM_VARIABLE_COMMUNICATE_HEADER *SmmVariableFunctionHeader; \r | |
130 | \r | |
131 | \r | |
132 | if (DataSize + SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE > mVariableBufferSize) {\r | |
133 | return EFI_INVALID_PARAMETER;\r | |
134 | }\r | |
135 | \r | |
136 | SmmCommunicateHeader = (EFI_SMM_COMMUNICATE_HEADER *) mVariableBuffer;\r | |
137 | CopyGuid (&SmmCommunicateHeader->HeaderGuid, &gEfiSmmVariableProtocolGuid);\r | |
138 | SmmCommunicateHeader->MessageLength = DataSize + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE;\r | |
139 | \r | |
140 | SmmVariableFunctionHeader = (SMM_VARIABLE_COMMUNICATE_HEADER *) SmmCommunicateHeader->Data;\r | |
141 | SmmVariableFunctionHeader->Function = Function;\r | |
142 | if (DataPtr != NULL) {\r | |
143 | *DataPtr = SmmVariableFunctionHeader->Data;\r | |
144 | }\r | |
145 | \r | |
146 | return EFI_SUCCESS;\r | |
147 | }\r | |
148 | \r | |
149 | \r | |
150 | /**\r | |
151 | Send the data in communicate buffer to SMM.\r | |
152 | \r | |
153 | @param[in] DataSize This size of the function header and the data.\r | |
154 | \r | |
32732a33 | 155 | @retval EFI_SUCCESS Success is returned from the functin in SMM.\r |
156 | @retval Others Failure is returned from the function in SMM. \r | |
8a2d4996 | 157 | \r |
158 | **/\r | |
159 | EFI_STATUS\r | |
160 | SendCommunicateBuffer (\r | |
161 | IN UINTN DataSize\r | |
162 | )\r | |
163 | {\r | |
164 | EFI_STATUS Status;\r | |
165 | UINTN CommSize;\r | |
166 | EFI_SMM_COMMUNICATE_HEADER *SmmCommunicateHeader; \r | |
167 | SMM_VARIABLE_COMMUNICATE_HEADER *SmmVariableFunctionHeader;\r | |
168 | \r | |
169 | CommSize = DataSize + SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE;\r | |
170 | Status = mSmmCommunication->Communicate (mSmmCommunication, mVariableBufferPhysical, &CommSize);\r | |
171 | ASSERT_EFI_ERROR (Status);\r | |
172 | \r | |
173 | SmmCommunicateHeader = (EFI_SMM_COMMUNICATE_HEADER *) mVariableBuffer;\r | |
174 | SmmVariableFunctionHeader = (SMM_VARIABLE_COMMUNICATE_HEADER *)SmmCommunicateHeader->Data;\r | |
175 | return SmmVariableFunctionHeader->ReturnStatus;\r | |
176 | }\r | |
177 | \r | |
ff843847 RN |
178 | /**\r |
179 | Mark a variable that will become read-only after leaving the DXE phase of execution.\r | |
180 | \r | |
181 | @param[in] This The VARIABLE_LOCK_PROTOCOL instance.\r | |
182 | @param[in] VariableName A pointer to the variable name that will be made read-only subsequently.\r | |
183 | @param[in] VendorGuid A pointer to the vendor GUID that will be made read-only subsequently.\r | |
184 | \r | |
185 | @retval EFI_SUCCESS The variable specified by the VariableName and the VendorGuid was marked\r | |
186 | as pending to be read-only.\r | |
187 | @retval EFI_INVALID_PARAMETER VariableName or VendorGuid is NULL.\r | |
188 | Or VariableName is an empty string.\r | |
189 | @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r | |
190 | already been signaled.\r | |
191 | @retval EFI_OUT_OF_RESOURCES There is not enough resource to hold the lock request.\r | |
192 | **/\r | |
193 | EFI_STATUS\r | |
194 | EFIAPI\r | |
195 | VariableLockRequestToLock (\r | |
196 | IN CONST EDKII_VARIABLE_LOCK_PROTOCOL *This,\r | |
197 | IN CHAR16 *VariableName,\r | |
198 | IN EFI_GUID *VendorGuid\r | |
199 | )\r | |
200 | {\r | |
201 | EFI_STATUS Status;\r | |
51547bb8 | 202 | UINTN VariableNameSize;\r |
ff843847 RN |
203 | UINTN PayloadSize;\r |
204 | SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE *VariableToLock;\r | |
205 | \r | |
206 | if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {\r | |
207 | return EFI_INVALID_PARAMETER;\r | |
208 | }\r | |
209 | \r | |
51547bb8 | 210 | VariableNameSize = StrSize (VariableName);\r |
4e1005ec | 211 | VariableToLock = NULL;\r |
51547bb8 RN |
212 | \r |
213 | //\r | |
214 | // If VariableName exceeds SMM payload limit. Return failure\r | |
215 | //\r | |
216 | if (VariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE, Name)) {\r | |
217 | return EFI_INVALID_PARAMETER;\r | |
218 | }\r | |
219 | \r | |
ff843847 RN |
220 | AcquireLockOnlyAtBootTime(&mVariableServicesLock);\r |
221 | \r | |
222 | //\r | |
223 | // Init the communicate buffer. The buffer data size is:\r | |
224 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize.\r | |
225 | //\r | |
51547bb8 | 226 | PayloadSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE, Name) + VariableNameSize;\r |
ff843847 RN |
227 | Status = InitCommunicateBuffer ((VOID **) &VariableToLock, PayloadSize, SMM_VARIABLE_FUNCTION_LOCK_VARIABLE);\r |
228 | if (EFI_ERROR (Status)) {\r | |
229 | goto Done;\r | |
230 | }\r | |
231 | ASSERT (VariableToLock != NULL);\r | |
232 | \r | |
233 | CopyGuid (&VariableToLock->Guid, VendorGuid);\r | |
51547bb8 | 234 | VariableToLock->NameSize = VariableNameSize;\r |
ff843847 RN |
235 | CopyMem (VariableToLock->Name, VariableName, VariableToLock->NameSize);\r |
236 | \r | |
237 | //\r | |
238 | // Send data to SMM.\r | |
239 | //\r | |
240 | Status = SendCommunicateBuffer (PayloadSize);\r | |
241 | \r | |
242 | Done:\r | |
243 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
244 | return Status;\r | |
245 | }\r | |
8a2d4996 | 246 | \r |
247 | /**\r | |
248 | This code finds variable in storage blocks (Volatile or Non-Volatile).\r | |
249 | \r | |
18a7dbbc SZ |
250 | Caution: This function may receive untrusted input.\r |
251 | The data size is external input, so this function will validate it carefully to avoid buffer overflow.\r | |
252 | \r | |
8a2d4996 | 253 | @param[in] VariableName Name of Variable to be found.\r |
254 | @param[in] VendorGuid Variable vendor GUID.\r | |
255 | @param[out] Attributes Attribute value of the variable found.\r | |
256 | @param[in, out] DataSize Size of Data found. If size is less than the\r | |
257 | data, this value contains the required size.\r | |
258 | @param[out] Data Data pointer.\r | |
259 | \r | |
260 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
261 | @retval EFI_SUCCESS Find the specified variable.\r | |
262 | @retval EFI_NOT_FOUND Not found.\r | |
263 | @retval EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r | |
264 | \r | |
265 | **/\r | |
266 | EFI_STATUS\r | |
267 | EFIAPI\r | |
268 | RuntimeServiceGetVariable (\r | |
269 | IN CHAR16 *VariableName,\r | |
270 | IN EFI_GUID *VendorGuid,\r | |
271 | OUT UINT32 *Attributes OPTIONAL,\r | |
272 | IN OUT UINTN *DataSize,\r | |
273 | OUT VOID *Data\r | |
274 | )\r | |
275 | {\r | |
276 | EFI_STATUS Status;\r | |
277 | UINTN PayloadSize;\r | |
278 | SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE *SmmVariableHeader;\r | |
3a146f2a | 279 | UINTN TempDataSize;\r |
9d00d20e | 280 | UINTN VariableNameSize;\r |
8a2d4996 | 281 | \r |
282 | if (VariableName == NULL || VendorGuid == NULL || DataSize == NULL) {\r | |
283 | return EFI_INVALID_PARAMETER;\r | |
284 | }\r | |
285 | \r | |
286 | if ((*DataSize != 0) && (Data == NULL)) {\r | |
287 | return EFI_INVALID_PARAMETER;\r | |
288 | }\r | |
6ed1ec59 | 289 | \r |
3a146f2a | 290 | TempDataSize = *DataSize;\r |
9d00d20e | 291 | VariableNameSize = StrSize (VariableName);\r |
4e1005ec | 292 | SmmVariableHeader = NULL;\r |
3a146f2a | 293 | \r |
294 | //\r | |
295 | // If VariableName exceeds SMM payload limit. Return failure\r | |
296 | //\r | |
5e5bb2a9 | 297 | if (VariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name)) {\r |
3588bb35 SZ |
298 | return EFI_INVALID_PARAMETER;\r |
299 | }\r | |
300 | \r | |
6ed1ec59 SZ |
301 | AcquireLockOnlyAtBootTime(&mVariableServicesLock);\r |
302 | \r | |
8a2d4996 | 303 | //\r |
304 | // Init the communicate buffer. The buffer data size is:\r | |
6ed1ec59 | 305 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize.\r |
8a2d4996 | 306 | //\r |
5e5bb2a9 | 307 | if (TempDataSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) - VariableNameSize) {\r |
3a146f2a | 308 | //\r |
309 | // If output data buffer exceed SMM payload limit. Trim output buffer to SMM payload size\r | |
310 | //\r | |
5e5bb2a9 | 311 | TempDataSize = mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) - VariableNameSize;\r |
3a146f2a | 312 | }\r |
9d00d20e | 313 | PayloadSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) + VariableNameSize + TempDataSize;\r |
3a146f2a | 314 | \r |
5c7fa429 | 315 | Status = InitCommunicateBuffer ((VOID **)&SmmVariableHeader, PayloadSize, SMM_VARIABLE_FUNCTION_GET_VARIABLE);\r |
8a2d4996 | 316 | if (EFI_ERROR (Status)) {\r |
6ed1ec59 | 317 | goto Done;\r |
8a2d4996 | 318 | }\r |
319 | ASSERT (SmmVariableHeader != NULL);\r | |
320 | \r | |
321 | CopyGuid (&SmmVariableHeader->Guid, VendorGuid);\r | |
3a146f2a | 322 | SmmVariableHeader->DataSize = TempDataSize;\r |
9d00d20e | 323 | SmmVariableHeader->NameSize = VariableNameSize;\r |
8a2d4996 | 324 | if (Attributes == NULL) {\r |
325 | SmmVariableHeader->Attributes = 0;\r | |
326 | } else {\r | |
327 | SmmVariableHeader->Attributes = *Attributes;\r | |
328 | }\r | |
329 | CopyMem (SmmVariableHeader->Name, VariableName, SmmVariableHeader->NameSize);\r | |
330 | \r | |
331 | //\r | |
332 | // Send data to SMM.\r | |
333 | //\r | |
334 | Status = SendCommunicateBuffer (PayloadSize);\r | |
335 | \r | |
336 | //\r | |
337 | // Get data from SMM.\r | |
338 | //\r | |
3a146f2a | 339 | if (Status == EFI_SUCCESS || Status == EFI_BUFFER_TOO_SMALL) {\r |
340 | //\r | |
341 | // SMM CommBuffer DataSize can be a trimed value\r | |
342 | // Only update DataSize when needed\r | |
343 | //\r | |
344 | *DataSize = SmmVariableHeader->DataSize;\r | |
345 | }\r | |
8a2d4996 | 346 | if (Attributes != NULL) {\r |
347 | *Attributes = SmmVariableHeader->Attributes;\r | |
348 | }\r | |
349 | \r | |
350 | if (EFI_ERROR (Status)) {\r | |
6ed1ec59 | 351 | goto Done;\r |
8a2d4996 | 352 | }\r |
353 | \r | |
354 | CopyMem (Data, (UINT8 *)SmmVariableHeader->Name + SmmVariableHeader->NameSize, SmmVariableHeader->DataSize);\r | |
355 | \r | |
6ed1ec59 SZ |
356 | Done:\r |
357 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
8a2d4996 | 358 | return Status;\r |
359 | }\r | |
360 | \r | |
361 | \r | |
362 | /**\r | |
363 | This code Finds the Next available variable.\r | |
364 | \r | |
365 | @param[in, out] VariableNameSize Size of the variable name.\r | |
366 | @param[in, out] VariableName Pointer to variable name.\r | |
367 | @param[in, out] VendorGuid Variable Vendor Guid.\r | |
368 | \r | |
369 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
370 | @retval EFI_SUCCESS Find the specified variable.\r | |
371 | @retval EFI_NOT_FOUND Not found.\r | |
372 | @retval EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r | |
373 | \r | |
374 | **/\r | |
375 | EFI_STATUS\r | |
376 | EFIAPI\r | |
377 | RuntimeServiceGetNextVariableName (\r | |
378 | IN OUT UINTN *VariableNameSize,\r | |
379 | IN OUT CHAR16 *VariableName,\r | |
380 | IN OUT EFI_GUID *VendorGuid\r | |
381 | )\r | |
382 | {\r | |
383 | EFI_STATUS Status;\r | |
384 | UINTN PayloadSize;\r | |
385 | SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME *SmmGetNextVariableName;\r | |
9d00d20e SZ |
386 | UINTN OutVariableNameSize;\r |
387 | UINTN InVariableNameSize;\r | |
8a2d4996 | 388 | \r |
389 | if (VariableNameSize == NULL || VariableName == NULL || VendorGuid == NULL) {\r | |
390 | return EFI_INVALID_PARAMETER;\r | |
391 | }\r | |
6ed1ec59 | 392 | \r |
9d00d20e SZ |
393 | OutVariableNameSize = *VariableNameSize;\r |
394 | InVariableNameSize = StrSize (VariableName);\r | |
4e1005ec | 395 | SmmGetNextVariableName = NULL;\r |
0c55190f | 396 | \r |
397 | //\r | |
398 | // If input string exceeds SMM payload limit. Return failure\r | |
399 | //\r | |
5e5bb2a9 | 400 | if (InVariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name)) {\r |
3588bb35 SZ |
401 | return EFI_INVALID_PARAMETER;\r |
402 | }\r | |
403 | \r | |
6ed1ec59 SZ |
404 | AcquireLockOnlyAtBootTime(&mVariableServicesLock);\r |
405 | \r | |
8a2d4996 | 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 | |
5e5bb2a9 | 410 | if (OutVariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name)) {\r |
0c55190f | 411 | //\r |
412 | // If output buffer exceed SMM payload limit. Trim output buffer to SMM payload size\r | |
413 | //\r | |
5e5bb2a9 | 414 | OutVariableNameSize = mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name);\r |
0c55190f | 415 | }\r |
416 | //\r | |
417 | // Payload should be Guid + NameSize + MAX of Input & Output buffer\r | |
418 | //\r | |
9d00d20e | 419 | PayloadSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME, Name) + MAX (OutVariableNameSize, InVariableNameSize);\r |
0c55190f | 420 | \r |
421 | \r | |
5c7fa429 | 422 | Status = InitCommunicateBuffer ((VOID **)&SmmGetNextVariableName, PayloadSize, SMM_VARIABLE_FUNCTION_GET_NEXT_VARIABLE_NAME);\r |
8a2d4996 | 423 | if (EFI_ERROR (Status)) {\r |
6ed1ec59 | 424 | goto Done;\r |
8a2d4996 | 425 | }\r |
426 | ASSERT (SmmGetNextVariableName != NULL);\r | |
427 | \r | |
0c55190f | 428 | //\r |
429 | // SMM comm buffer->NameSize is buffer size for return string\r | |
430 | //\r | |
9d00d20e | 431 | SmmGetNextVariableName->NameSize = OutVariableNameSize;\r |
0c55190f | 432 | \r |
8a2d4996 | 433 | CopyGuid (&SmmGetNextVariableName->Guid, VendorGuid);\r |
0c55190f | 434 | //\r |
435 | // Copy whole string\r | |
436 | //\r | |
9d00d20e SZ |
437 | CopyMem (SmmGetNextVariableName->Name, VariableName, InVariableNameSize);\r |
438 | if (OutVariableNameSize > InVariableNameSize) {\r | |
439 | ZeroMem ((UINT8 *) SmmGetNextVariableName->Name + InVariableNameSize, OutVariableNameSize - InVariableNameSize);\r | |
440 | }\r | |
8a2d4996 | 441 | \r |
442 | //\r | |
443 | // Send data to SMM\r | |
444 | //\r | |
445 | Status = SendCommunicateBuffer (PayloadSize);\r | |
446 | \r | |
447 | //\r | |
448 | // Get data from SMM.\r | |
449 | //\r | |
9d00d20e SZ |
450 | if (Status == EFI_SUCCESS || Status == EFI_BUFFER_TOO_SMALL) {\r |
451 | //\r | |
452 | // SMM CommBuffer NameSize can be a trimed value\r | |
453 | // Only update VariableNameSize when needed\r | |
454 | //\r | |
455 | *VariableNameSize = SmmGetNextVariableName->NameSize;\r | |
456 | }\r | |
8a2d4996 | 457 | if (EFI_ERROR (Status)) {\r |
6ed1ec59 | 458 | goto Done;\r |
8a2d4996 | 459 | }\r |
460 | \r | |
461 | CopyGuid (VendorGuid, &SmmGetNextVariableName->Guid);\r | |
462 | CopyMem (VariableName, SmmGetNextVariableName->Name, SmmGetNextVariableName->NameSize); \r | |
463 | \r | |
6ed1ec59 SZ |
464 | Done:\r |
465 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
8a2d4996 | 466 | return Status;\r |
467 | }\r | |
468 | \r | |
469 | /**\r | |
470 | This code sets variable in storage blocks (Volatile or Non-Volatile).\r | |
471 | \r | |
18a7dbbc SZ |
472 | Caution: This function may receive untrusted input.\r |
473 | The data size and data are external input, so this function will validate it carefully to avoid buffer overflow.\r | |
474 | \r | |
8a2d4996 | 475 | @param[in] VariableName Name of Variable to be found.\r |
476 | @param[in] VendorGuid Variable vendor GUID.\r | |
477 | @param[in] Attributes Attribute value of the variable found\r | |
478 | @param[in] DataSize Size of Data found. If size is less than the\r | |
479 | data, this value contains the required size.\r | |
480 | @param[in] Data Data pointer.\r | |
481 | \r | |
482 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
483 | @retval EFI_SUCCESS Set successfully.\r | |
484 | @retval EFI_OUT_OF_RESOURCES Resource not enough to set variable.\r | |
485 | @retval EFI_NOT_FOUND Not found.\r | |
486 | @retval EFI_WRITE_PROTECTED Variable is read-only.\r | |
487 | \r | |
488 | **/\r | |
489 | EFI_STATUS\r | |
490 | EFIAPI\r | |
491 | RuntimeServiceSetVariable (\r | |
492 | IN CHAR16 *VariableName,\r | |
493 | IN EFI_GUID *VendorGuid,\r | |
494 | IN UINT32 Attributes,\r | |
495 | IN UINTN DataSize,\r | |
496 | IN VOID *Data\r | |
497 | )\r | |
498 | {\r | |
499 | EFI_STATUS Status;\r | |
500 | UINTN PayloadSize; \r | |
501 | SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE *SmmVariableHeader;\r | |
9d00d20e | 502 | UINTN VariableNameSize;\r |
8a2d4996 | 503 | \r |
504 | //\r | |
505 | // Check input parameters.\r | |
506 | //\r | |
507 | if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {\r | |
508 | return EFI_INVALID_PARAMETER;\r | |
509 | } \r | |
510 | \r | |
511 | if (DataSize != 0 && Data == NULL) {\r | |
512 | return EFI_INVALID_PARAMETER;\r | |
513 | }\r | |
6ed1ec59 | 514 | \r |
9d00d20e | 515 | VariableNameSize = StrSize (VariableName);\r |
4e1005ec | 516 | SmmVariableHeader = NULL;\r |
3588bb35 | 517 | \r |
5e5bb2a9 SZ |
518 | //\r |
519 | // If VariableName or DataSize exceeds SMM payload limit. Return failure\r | |
520 | //\r | |
521 | if ((VariableNameSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name)) ||\r | |
522 | (DataSize > mVariableBufferPayloadSize - OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) - VariableNameSize)){\r | |
56251c66 | 523 | return EFI_INVALID_PARAMETER;\r |
524 | }\r | |
525 | \r | |
6ed1ec59 SZ |
526 | AcquireLockOnlyAtBootTime(&mVariableServicesLock);\r |
527 | \r | |
8a2d4996 | 528 | //\r |
529 | // Init the communicate buffer. The buffer data size is:\r | |
530 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize.\r | |
531 | //\r | |
9d00d20e | 532 | PayloadSize = OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) + VariableNameSize + DataSize;\r |
5c7fa429 | 533 | Status = InitCommunicateBuffer ((VOID **)&SmmVariableHeader, PayloadSize, SMM_VARIABLE_FUNCTION_SET_VARIABLE);\r |
8a2d4996 | 534 | if (EFI_ERROR (Status)) {\r |
6ed1ec59 | 535 | goto Done;\r |
8a2d4996 | 536 | }\r |
537 | ASSERT (SmmVariableHeader != NULL);\r | |
538 | \r | |
539 | CopyGuid ((EFI_GUID *) &SmmVariableHeader->Guid, VendorGuid);\r | |
540 | SmmVariableHeader->DataSize = DataSize;\r | |
9d00d20e | 541 | SmmVariableHeader->NameSize = VariableNameSize;\r |
8a2d4996 | 542 | SmmVariableHeader->Attributes = Attributes;\r |
543 | CopyMem (SmmVariableHeader->Name, VariableName, SmmVariableHeader->NameSize);\r | |
544 | CopyMem ((UINT8 *) SmmVariableHeader->Name + SmmVariableHeader->NameSize, Data, DataSize);\r | |
545 | \r | |
546 | //\r | |
547 | // Send data to SMM.\r | |
548 | //\r | |
549 | Status = SendCommunicateBuffer (PayloadSize);\r | |
6ed1ec59 SZ |
550 | \r |
551 | Done:\r | |
552 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
8a2d4996 | 553 | return Status;\r |
554 | }\r | |
555 | \r | |
556 | \r | |
557 | /**\r | |
558 | This code returns information about the EFI variables.\r | |
559 | \r | |
560 | @param[in] Attributes Attributes bitmask to specify the type of variables\r | |
561 | on which to return information.\r | |
562 | @param[out] MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r | |
563 | for the EFI variables associated with the attributes specified.\r | |
564 | @param[out] RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r | |
565 | for EFI variables associated with the attributes specified.\r | |
566 | @param[out] MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r | |
567 | associated with the attributes specified.\r | |
568 | \r | |
569 | @retval EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.\r | |
570 | @retval EFI_SUCCESS Query successfully.\r | |
571 | @retval EFI_UNSUPPORTED The attribute is not supported on this platform.\r | |
572 | \r | |
573 | **/\r | |
574 | EFI_STATUS\r | |
575 | EFIAPI\r | |
576 | RuntimeServiceQueryVariableInfo (\r | |
577 | IN UINT32 Attributes,\r | |
578 | OUT UINT64 *MaximumVariableStorageSize,\r | |
579 | OUT UINT64 *RemainingVariableStorageSize,\r | |
580 | OUT UINT64 *MaximumVariableSize\r | |
581 | )\r | |
582 | {\r | |
583 | EFI_STATUS Status;\r | |
584 | UINTN PayloadSize;\r | |
585 | SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO *SmmQueryVariableInfo;\r | |
586 | \r | |
4e1005ec ED |
587 | SmmQueryVariableInfo = NULL;\r |
588 | \r | |
8a2d4996 | 589 | if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL || Attributes == 0) {\r |
590 | return EFI_INVALID_PARAMETER;\r | |
591 | }\r | |
6ed1ec59 SZ |
592 | \r |
593 | AcquireLockOnlyAtBootTime(&mVariableServicesLock);\r | |
594 | \r | |
8a2d4996 | 595 | //\r |
596 | // Init the communicate buffer. The buffer data size is:\r | |
597 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + PayloadSize;\r | |
598 | //\r | |
d00ed85e | 599 | PayloadSize = sizeof (SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO);\r |
5c7fa429 | 600 | Status = InitCommunicateBuffer ((VOID **)&SmmQueryVariableInfo, PayloadSize, SMM_VARIABLE_FUNCTION_QUERY_VARIABLE_INFO);\r |
8a2d4996 | 601 | if (EFI_ERROR (Status)) {\r |
6ed1ec59 | 602 | goto Done;\r |
8a2d4996 | 603 | }\r |
604 | ASSERT (SmmQueryVariableInfo != NULL);\r | |
605 | \r | |
606 | SmmQueryVariableInfo->Attributes = Attributes;\r | |
607 | \r | |
608 | //\r | |
609 | // Send data to SMM.\r | |
610 | //\r | |
611 | Status = SendCommunicateBuffer (PayloadSize);\r | |
612 | if (EFI_ERROR (Status)) {\r | |
6ed1ec59 | 613 | goto Done;\r |
8a2d4996 | 614 | }\r |
615 | \r | |
616 | //\r | |
617 | // Get data from SMM.\r | |
618 | //\r | |
619 | *MaximumVariableSize = SmmQueryVariableInfo->MaximumVariableSize;\r | |
620 | *MaximumVariableStorageSize = SmmQueryVariableInfo->MaximumVariableStorageSize;\r | |
621 | *RemainingVariableStorageSize = SmmQueryVariableInfo->RemainingVariableStorageSize; \r | |
6ed1ec59 SZ |
622 | \r |
623 | Done:\r | |
624 | ReleaseLockOnlyAtBootTime (&mVariableServicesLock);\r | |
aab9212f | 625 | return Status;\r |
8a2d4996 | 626 | }\r |
627 | \r | |
628 | \r | |
629 | /**\r | |
630 | Exit Boot Services Event notification handler.\r | |
631 | \r | |
632 | Notify SMM variable driver about the event.\r | |
633 | \r | |
634 | @param[in] Event Event whose notification function is being invoked.\r | |
635 | @param[in] Context Pointer to the notification function's context.\r | |
636 | \r | |
637 | **/\r | |
638 | VOID\r | |
639 | EFIAPI\r | |
640 | OnExitBootServices (\r | |
641 | IN EFI_EVENT Event,\r | |
642 | IN VOID *Context\r | |
643 | )\r | |
644 | {\r | |
645 | //\r | |
646 | // Init the communicate buffer. The buffer data size is:\r | |
647 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE.\r | |
648 | //\r | |
649 | InitCommunicateBuffer (NULL, 0, SMM_VARIABLE_FUNCTION_EXIT_BOOT_SERVICE); \r | |
650 | \r | |
651 | //\r | |
652 | // Send data to SMM.\r | |
653 | //\r | |
654 | SendCommunicateBuffer (0);\r | |
655 | }\r | |
656 | \r | |
657 | \r | |
658 | /**\r | |
659 | On Ready To Boot Services Event notification handler.\r | |
660 | \r | |
661 | Notify SMM variable driver about the event.\r | |
662 | \r | |
663 | @param[in] Event Event whose notification function is being invoked\r | |
664 | @param[in] Context Pointer to the notification function's context\r | |
665 | \r | |
666 | **/\r | |
667 | VOID\r | |
668 | EFIAPI\r | |
669 | OnReadyToBoot (\r | |
670 | IN EFI_EVENT Event,\r | |
671 | IN VOID *Context\r | |
672 | )\r | |
673 | {\r | |
674 | //\r | |
675 | // Init the communicate buffer. The buffer data size is:\r | |
676 | // SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE.\r | |
677 | //\r | |
678 | InitCommunicateBuffer (NULL, 0, SMM_VARIABLE_FUNCTION_READY_TO_BOOT);\r | |
679 | \r | |
680 | //\r | |
681 | // Send data to SMM.\r | |
682 | //\r | |
683 | SendCommunicateBuffer (0);\r | |
684 | }\r | |
685 | \r | |
686 | \r | |
687 | /**\r | |
688 | Notification function of EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE.\r | |
689 | \r | |
690 | This is a notification function registered on EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r | |
691 | It convers pointer to new virtual address.\r | |
692 | \r | |
693 | @param[in] Event Event whose notification function is being invoked.\r | |
694 | @param[in] Context Pointer to the notification function's context.\r | |
695 | \r | |
696 | **/\r | |
697 | VOID\r | |
698 | EFIAPI\r | |
699 | VariableAddressChangeEvent (\r | |
700 | IN EFI_EVENT Event,\r | |
701 | IN VOID *Context\r | |
702 | )\r | |
703 | {\r | |
704 | EfiConvertPointer (0x0, (VOID **) &mVariableBuffer);\r | |
705 | EfiConvertPointer (0x0, (VOID **) &mSmmCommunication);\r | |
706 | }\r | |
707 | \r | |
708 | \r | |
709 | /**\r | |
710 | Initialize variable service and install Variable Architectural protocol.\r | |
711 | \r | |
712 | @param[in] Event Event whose notification function is being invoked.\r | |
713 | @param[in] Context Pointer to the notification function's context.\r | |
714 | \r | |
715 | **/\r | |
716 | VOID\r | |
717 | EFIAPI\r | |
718 | SmmVariableReady (\r | |
719 | IN EFI_EVENT Event,\r | |
720 | IN VOID *Context\r | |
721 | )\r | |
722 | {\r | |
723 | EFI_STATUS Status;\r | |
724 | \r | |
725 | Status = gBS->LocateProtocol (&gEfiSmmVariableProtocolGuid, NULL, (VOID **)&mSmmVariable);\r | |
726 | if (EFI_ERROR (Status)) {\r | |
727 | return;\r | |
728 | }\r | |
729 | \r | |
730 | Status = gBS->LocateProtocol (&gEfiSmmCommunicationProtocolGuid, NULL, (VOID **) &mSmmCommunication);\r | |
731 | ASSERT_EFI_ERROR (Status);\r | |
732 | \r | |
733 | //\r | |
5e5bb2a9 | 734 | // Allocate memory for variable communicate buffer.\r |
8a2d4996 | 735 | //\r |
5e5bb2a9 SZ |
736 | mVariableBufferPayloadSize = MAX (PcdGet32 (PcdMaxVariableSize), PcdGet32 (PcdMaxHardwareErrorVariableSize)) +\r |
737 | OFFSET_OF (SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE, Name) - sizeof (VARIABLE_HEADER);\r | |
738 | mVariableBufferSize = SMM_COMMUNICATE_HEADER_SIZE + SMM_VARIABLE_COMMUNICATE_HEADER_SIZE + mVariableBufferPayloadSize;\r | |
8a2d4996 | 739 | mVariableBuffer = AllocateRuntimePool (mVariableBufferSize);\r |
740 | ASSERT (mVariableBuffer != NULL);\r | |
741 | \r | |
742 | //\r | |
743 | // Save the buffer physical address used for SMM conmunication.\r | |
744 | //\r | |
745 | mVariableBufferPhysical = mVariableBuffer;\r | |
746 | \r | |
747 | gRT->GetVariable = RuntimeServiceGetVariable;\r | |
748 | gRT->GetNextVariableName = RuntimeServiceGetNextVariableName;\r | |
749 | gRT->SetVariable = RuntimeServiceSetVariable;\r | |
750 | gRT->QueryVariableInfo = RuntimeServiceQueryVariableInfo;\r | |
751 | \r | |
752 | //\r | |
753 | // Install the Variable Architectural Protocol on a new handle.\r | |
754 | //\r | |
755 | Status = gBS->InstallProtocolInterface (\r | |
756 | &mHandle,\r | |
757 | &gEfiVariableArchProtocolGuid, \r | |
758 | EFI_NATIVE_INTERFACE,\r | |
759 | NULL\r | |
760 | );\r | |
761 | ASSERT_EFI_ERROR (Status);\r | |
762 | }\r | |
763 | \r | |
764 | \r | |
765 | /**\r | |
766 | SMM Non-Volatile variable write service is ready notify event handler.\r | |
767 | \r | |
768 | @param[in] Event Event whose notification function is being invoked.\r | |
769 | @param[in] Context Pointer to the notification function's context.\r | |
770 | \r | |
771 | **/\r | |
772 | VOID\r | |
773 | EFIAPI\r | |
774 | SmmVariableWriteReady (\r | |
775 | IN EFI_EVENT Event,\r | |
776 | IN VOID *Context\r | |
777 | )\r | |
778 | {\r | |
779 | EFI_STATUS Status;\r | |
780 | VOID *ProtocolOps;\r | |
781 | \r | |
782 | //\r | |
783 | // Check whether the protocol is installed or not.\r | |
784 | //\r | |
d00ed85e | 785 | Status = gBS->LocateProtocol (&gSmmVariableWriteGuid, NULL, (VOID **) &ProtocolOps);\r |
8a2d4996 | 786 | if (EFI_ERROR (Status)) {\r |
787 | return;\r | |
788 | }\r | |
789 | \r | |
790 | Status = gBS->InstallProtocolInterface (\r | |
791 | &mHandle,\r | |
792 | &gEfiVariableWriteArchProtocolGuid, \r | |
793 | EFI_NATIVE_INTERFACE,\r | |
794 | NULL\r | |
795 | );\r | |
796 | ASSERT_EFI_ERROR (Status); \r | |
797 | }\r | |
798 | \r | |
799 | \r | |
800 | /**\r | |
801 | Variable Driver main entry point. The Variable driver places the 4 EFI\r | |
802 | runtime services in the EFI System Table and installs arch protocols \r | |
d00ed85e | 803 | for variable read and write services being available. It also registers\r |
8a2d4996 | 804 | a notification function for an EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r |
805 | \r | |
806 | @param[in] ImageHandle The firmware allocated handle for the EFI image. \r | |
807 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
808 | \r | |
809 | @retval EFI_SUCCESS Variable service successfully initialized.\r | |
810 | \r | |
811 | **/\r | |
812 | EFI_STATUS\r | |
813 | EFIAPI\r | |
814 | VariableSmmRuntimeInitialize (\r | |
815 | IN EFI_HANDLE ImageHandle,\r | |
816 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
817 | )\r | |
818 | {\r | |
ff843847 | 819 | EFI_STATUS Status;\r |
8a2d4996 | 820 | VOID *SmmVariableRegistration;\r |
821 | VOID *SmmVariableWriteRegistration;\r | |
822 | EFI_EVENT OnReadyToBootEvent;\r | |
823 | EFI_EVENT ExitBootServiceEvent;\r | |
6ed1ec59 SZ |
824 | \r |
825 | EfiInitializeLock (&mVariableServicesLock, TPL_NOTIFY);\r | |
826 | \r | |
ff843847 RN |
827 | mVariableLock.RequestToLock = VariableLockRequestToLock;\r |
828 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
829 | &mHandle,\r | |
830 | &gEdkiiVariableLockProtocolGuid,\r | |
831 | &mVariableLock,\r | |
832 | NULL\r | |
833 | );\r | |
834 | ASSERT_EFI_ERROR (Status);\r | |
835 | \r | |
8a2d4996 | 836 | //\r |
837 | // Smm variable service is ready\r | |
838 | //\r | |
839 | EfiCreateProtocolNotifyEvent (\r | |
840 | &gEfiSmmVariableProtocolGuid, \r | |
841 | TPL_CALLBACK, \r | |
842 | SmmVariableReady, \r | |
843 | NULL, \r | |
844 | &SmmVariableRegistration\r | |
845 | );\r | |
846 | \r | |
847 | //\r | |
848 | // Smm Non-Volatile variable write service is ready\r | |
849 | //\r | |
850 | EfiCreateProtocolNotifyEvent (\r | |
d00ed85e | 851 | &gSmmVariableWriteGuid, \r |
8a2d4996 | 852 | TPL_CALLBACK, \r |
853 | SmmVariableWriteReady, \r | |
854 | NULL, \r | |
855 | &SmmVariableWriteRegistration\r | |
856 | );\r | |
857 | \r | |
858 | //\r | |
859 | // Register the event to reclaim variable for OS usage.\r | |
860 | //\r | |
861 | EfiCreateEventReadyToBootEx (\r | |
862 | TPL_NOTIFY, \r | |
863 | OnReadyToBoot, \r | |
864 | NULL, \r | |
865 | &OnReadyToBootEvent\r | |
866 | ); \r | |
867 | \r | |
868 | //\r | |
869 | // Register the event to inform SMM variable that it is at runtime.\r | |
870 | //\r | |
871 | gBS->CreateEventEx (\r | |
872 | EVT_NOTIFY_SIGNAL,\r | |
873 | TPL_NOTIFY,\r | |
874 | OnExitBootServices,\r | |
875 | NULL,\r | |
876 | &gEfiEventExitBootServicesGuid,\r | |
877 | &ExitBootServiceEvent\r | |
878 | ); \r | |
879 | \r | |
880 | //\r | |
881 | // Register the event to convert the pointer for runtime.\r | |
882 | //\r | |
883 | gBS->CreateEventEx (\r | |
884 | EVT_NOTIFY_SIGNAL,\r | |
885 | TPL_NOTIFY,\r | |
886 | VariableAddressChangeEvent,\r | |
887 | NULL,\r | |
888 | &gEfiEventVirtualAddressChangeGuid,\r | |
889 | &mVirtualAddressChangeEvent\r | |
890 | );\r | |
891 | \r | |
892 | return EFI_SUCCESS;\r | |
893 | }\r | |
894 | \r |