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0c18794e | 1 | /** @file\r |
2 | It updates TPM items in ACPI table and registers SMI callback\r | |
3 | functions for physical presence and ClearMemory.\r | |
4 | \r | |
dc204d5a JY |
5 | Caution: This module requires additional review when modified.\r |
6 | This driver will have external input - variable and ACPINvs data in SMM mode.\r | |
7 | This external input must be validated carefully to avoid security issue.\r | |
8 | \r | |
9 | PhysicalPresenceCallback() and MemoryClearCallback() will receive untrusted input and do some check.\r | |
10 | \r | |
b3548d32 | 11 | Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>\r |
289b714b | 12 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
0c18794e | 13 | \r |
14 | **/\r | |
15 | \r | |
82a1e09c | 16 | #include "TcgSmm.h"\r |
0c18794e | 17 | \r |
18 | EFI_SMM_VARIABLE_PROTOCOL *mSmmVariable;\r | |
19 | TCG_NVS *mTcgNvs;\r | |
20 | \r | |
21 | /**\r | |
22 | Software SMI callback for TPM physical presence which is called from ACPI method.\r | |
23 | \r | |
dc204d5a JY |
24 | Caution: This function may receive untrusted input.\r |
25 | Variable and ACPINvs are external input, so this function will validate\r | |
26 | its data structure to be valid value.\r | |
27 | \r | |
0c18794e | 28 | @param[in] DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r |
29 | @param[in] Context Points to an optional handler context which was specified when the\r | |
30 | handler was registered.\r | |
31 | @param[in, out] CommBuffer A pointer to a collection of data in memory that will\r | |
32 | be conveyed from a non-SMM environment into an SMM environment.\r | |
33 | @param[in, out] CommBufferSize The size of the CommBuffer.\r | |
34 | \r | |
35 | @retval EFI_SUCCESS The interrupt was handled successfully.\r | |
36 | \r | |
37 | **/\r | |
38 | EFI_STATUS\r | |
39 | EFIAPI\r | |
40 | PhysicalPresenceCallback (\r | |
41 | IN EFI_HANDLE DispatchHandle,\r | |
42 | IN CONST VOID *Context,\r | |
43 | IN OUT VOID *CommBuffer,\r | |
44 | IN OUT UINTN *CommBufferSize\r | |
45 | )\r | |
46 | {\r | |
47 | EFI_STATUS Status;\r | |
48 | UINTN DataSize;\r | |
49 | EFI_PHYSICAL_PRESENCE PpData;\r | |
4610b23a | 50 | EFI_PHYSICAL_PRESENCE_FLAGS Flags;\r |
0c18794e | 51 | BOOLEAN RequestConfirmed;\r |
52 | \r | |
53 | //\r | |
54 | // Get the Physical Presence variable\r | |
55 | //\r | |
56 | DataSize = sizeof (EFI_PHYSICAL_PRESENCE);\r | |
57 | Status = mSmmVariable->SmmGetVariable (\r | |
58 | PHYSICAL_PRESENCE_VARIABLE,\r | |
59 | &gEfiPhysicalPresenceGuid,\r | |
60 | NULL,\r | |
61 | &DataSize,\r | |
62 | &PpData\r | |
63 | );\r | |
0c18794e | 64 | \r |
65 | DEBUG ((EFI_D_INFO, "[TPM] PP callback, Parameter = %x\n", mTcgNvs->PhysicalPresence.Parameter));\r | |
82a1e09c | 66 | if (mTcgNvs->PhysicalPresence.Parameter == ACPI_FUNCTION_RETURN_REQUEST_RESPONSE_TO_OS) {\r |
4610b23a JY |
67 | if (EFI_ERROR (Status)) {\r |
68 | mTcgNvs->PhysicalPresence.ReturnCode = PP_RETURN_TPM_OPERATION_RESPONSE_FAILURE;\r | |
69 | mTcgNvs->PhysicalPresence.LastRequest = 0;\r | |
70 | mTcgNvs->PhysicalPresence.Response = 0;\r | |
71 | DEBUG ((EFI_D_ERROR, "[TPM] Get PP variable failure! Status = %r\n", Status));\r | |
72 | return EFI_SUCCESS;\r | |
73 | }\r | |
74 | mTcgNvs->PhysicalPresence.ReturnCode = PP_RETURN_TPM_OPERATION_RESPONSE_SUCCESS;\r | |
0c18794e | 75 | mTcgNvs->PhysicalPresence.LastRequest = PpData.LastPPRequest;\r |
76 | mTcgNvs->PhysicalPresence.Response = PpData.PPResponse;\r | |
b3548d32 | 77 | } else if ((mTcgNvs->PhysicalPresence.Parameter == ACPI_FUNCTION_SUBMIT_REQUEST_TO_BIOS)\r |
82a1e09c | 78 | || (mTcgNvs->PhysicalPresence.Parameter == ACPI_FUNCTION_SUBMIT_REQUEST_TO_BIOS_2)) {\r |
4610b23a JY |
79 | if (EFI_ERROR (Status)) {\r |
80 | mTcgNvs->PhysicalPresence.ReturnCode = TCG_PP_SUBMIT_REQUEST_TO_PREOS_GENERAL_FAILURE;\r | |
81 | DEBUG ((EFI_D_ERROR, "[TPM] Get PP variable failure! Status = %r\n", Status));\r | |
82 | return EFI_SUCCESS;\r | |
83 | }\r | |
607599bf | 84 | if (mTcgNvs->PhysicalPresence.Request == PHYSICAL_PRESENCE_SET_OPERATOR_AUTH) {\r |
0c18794e | 85 | //\r |
82a1e09c | 86 | // This command requires UI to prompt user for Auth data.\r |
0c18794e | 87 | //\r |
4610b23a | 88 | mTcgNvs->PhysicalPresence.ReturnCode = TCG_PP_SUBMIT_REQUEST_TO_PREOS_NOT_IMPLEMENTED;\r |
0c18794e | 89 | return EFI_SUCCESS;\r |
90 | }\r | |
91 | \r | |
92 | if (PpData.PPRequest != mTcgNvs->PhysicalPresence.Request) {\r | |
93 | PpData.PPRequest = (UINT8) mTcgNvs->PhysicalPresence.Request;\r | |
94 | DataSize = sizeof (EFI_PHYSICAL_PRESENCE);\r | |
95 | Status = mSmmVariable->SmmSetVariable (\r | |
96 | PHYSICAL_PRESENCE_VARIABLE,\r | |
97 | &gEfiPhysicalPresenceGuid,\r | |
98 | EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r | |
99 | DataSize,\r | |
100 | &PpData\r | |
101 | );\r | |
102 | }\r | |
103 | \r | |
b3548d32 | 104 | if (EFI_ERROR (Status)) {\r |
4610b23a | 105 | mTcgNvs->PhysicalPresence.ReturnCode = TCG_PP_SUBMIT_REQUEST_TO_PREOS_GENERAL_FAILURE;\r |
0c18794e | 106 | return EFI_SUCCESS;\r |
107 | }\r | |
4610b23a JY |
108 | mTcgNvs->PhysicalPresence.ReturnCode = TCG_PP_SUBMIT_REQUEST_TO_PREOS_SUCCESS;\r |
109 | \r | |
110 | if (mTcgNvs->PhysicalPresence.Request >= TCG_PHYSICAL_PRESENCE_VENDOR_SPECIFIC_OPERATION) {\r | |
111 | DataSize = sizeof (EFI_PHYSICAL_PRESENCE_FLAGS);\r | |
112 | Status = mSmmVariable->SmmGetVariable (\r | |
113 | PHYSICAL_PRESENCE_FLAGS_VARIABLE,\r | |
114 | &gEfiPhysicalPresenceGuid,\r | |
115 | NULL,\r | |
116 | &DataSize,\r | |
117 | &Flags\r | |
118 | );\r | |
119 | if (EFI_ERROR (Status)) {\r | |
120 | Flags.PPFlags = TCG_BIOS_TPM_MANAGEMENT_FLAG_NO_PPI_PROVISION;\r | |
121 | }\r | |
122 | mTcgNvs->PhysicalPresence.ReturnCode = TcgPpVendorLibSubmitRequestToPreOSFunction (mTcgNvs->PhysicalPresence.Request, Flags.PPFlags);\r | |
123 | }\r | |
82a1e09c | 124 | } else if (mTcgNvs->PhysicalPresence.Parameter == ACPI_FUNCTION_GET_USER_CONFIRMATION_STATUS_FOR_REQUEST) {\r |
4610b23a JY |
125 | if (EFI_ERROR (Status)) {\r |
126 | mTcgNvs->PhysicalPresence.ReturnCode = TCG_PP_GET_USER_CONFIRMATION_BLOCKED_BY_BIOS_CONFIGURATION;\r | |
127 | DEBUG ((EFI_D_ERROR, "[TPM] Get PP variable failure! Status = %r\n", Status));\r | |
128 | return EFI_SUCCESS;\r | |
129 | }\r | |
ed094569 DG |
130 | //\r |
131 | // Get the Physical Presence flags\r | |
132 | //\r | |
4610b23a | 133 | DataSize = sizeof (EFI_PHYSICAL_PRESENCE_FLAGS);\r |
ed094569 DG |
134 | Status = mSmmVariable->SmmGetVariable (\r |
135 | PHYSICAL_PRESENCE_FLAGS_VARIABLE,\r | |
136 | &gEfiPhysicalPresenceGuid,\r | |
137 | NULL,\r | |
138 | &DataSize,\r | |
139 | &Flags\r | |
140 | );\r | |
141 | if (EFI_ERROR (Status)) {\r | |
4610b23a | 142 | mTcgNvs->PhysicalPresence.ReturnCode = TCG_PP_GET_USER_CONFIRMATION_BLOCKED_BY_BIOS_CONFIGURATION;\r |
8a8c6c96 | 143 | DEBUG ((EFI_D_ERROR, "[TPM] Get PP flags failure! Status = %r\n", Status));\r |
ed094569 DG |
144 | return EFI_SUCCESS;\r |
145 | }\r | |
146 | \r | |
0c18794e | 147 | RequestConfirmed = FALSE;\r |
148 | \r | |
053f31e3 | 149 | switch (mTcgNvs->PPRequestUserConfirm) {\r |
607599bf | 150 | case PHYSICAL_PRESENCE_ENABLE:\r |
151 | case PHYSICAL_PRESENCE_DISABLE:\r | |
152 | case PHYSICAL_PRESENCE_ACTIVATE:\r | |
153 | case PHYSICAL_PRESENCE_DEACTIVATE:\r | |
154 | case PHYSICAL_PRESENCE_ENABLE_ACTIVATE:\r | |
155 | case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE:\r | |
156 | case PHYSICAL_PRESENCE_SET_OWNER_INSTALL_TRUE:\r | |
157 | case PHYSICAL_PRESENCE_SET_OWNER_INSTALL_FALSE:\r | |
158 | case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_OWNER_TRUE:\r | |
159 | case PHYSICAL_PRESENCE_DEACTIVATE_DISABLE_OWNER_FALSE:\r | |
4610b23a | 160 | if ((Flags.PPFlags & TCG_BIOS_TPM_MANAGEMENT_FLAG_NO_PPI_PROVISION) != 0) {\r |
0c18794e | 161 | RequestConfirmed = TRUE;\r |
162 | }\r | |
163 | break;\r | |
164 | \r | |
607599bf | 165 | case PHYSICAL_PRESENCE_CLEAR:\r |
166 | case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR:\r | |
4610b23a | 167 | if ((Flags.PPFlags & TCG_BIOS_TPM_MANAGEMENT_FLAG_NO_PPI_CLEAR) != 0) {\r |
0c18794e | 168 | RequestConfirmed = TRUE;\r |
169 | }\r | |
170 | break;\r | |
171 | \r | |
607599bf | 172 | case PHYSICAL_PRESENCE_DEFERRED_PP_UNOWNERED_FIELD_UPGRADE:\r |
4610b23a | 173 | if ((Flags.PPFlags & TCG_BIOS_TPM_MANAGEMENT_FLAG_NO_PPI_MAINTENANCE) != 0) {\r |
0c18794e | 174 | RequestConfirmed = TRUE;\r |
175 | }\r | |
176 | break;\r | |
177 | \r | |
607599bf | 178 | case PHYSICAL_PRESENCE_ENABLE_ACTIVATE_CLEAR_ENABLE_ACTIVATE:\r |
179 | case PHYSICAL_PRESENCE_CLEAR_ENABLE_ACTIVATE:\r | |
4610b23a | 180 | if ((Flags.PPFlags & TCG_BIOS_TPM_MANAGEMENT_FLAG_NO_PPI_CLEAR) != 0 && (Flags.PPFlags & TCG_BIOS_TPM_MANAGEMENT_FLAG_NO_PPI_PROVISION) != 0) {\r |
0c18794e | 181 | RequestConfirmed = TRUE;\r |
182 | }\r | |
b3548d32 | 183 | break;\r |
0c18794e | 184 | \r |
607599bf | 185 | case PHYSICAL_PRESENCE_SET_NO_PPI_PROVISION_FALSE:\r |
186 | case PHYSICAL_PRESENCE_SET_NO_PPI_CLEAR_FALSE:\r | |
187 | case PHYSICAL_PRESENCE_SET_NO_PPI_MAINTENANCE_FALSE:\r | |
188 | case PHYSICAL_PRESENCE_NO_ACTION:\r | |
0c18794e | 189 | RequestConfirmed = TRUE;\r |
190 | break;\r | |
191 | \r | |
607599bf | 192 | case PHYSICAL_PRESENCE_SET_OPERATOR_AUTH:\r |
0c18794e | 193 | //\r |
194 | // This command requires UI to prompt user for Auth data\r | |
0c18794e | 195 | //\r |
b3548d32 | 196 | mTcgNvs->PhysicalPresence.ReturnCode = TCG_PP_GET_USER_CONFIRMATION_NOT_IMPLEMENTED;\r |
0c18794e | 197 | return EFI_SUCCESS;\r |
4610b23a JY |
198 | default:\r |
199 | break;\r | |
0c18794e | 200 | }\r |
201 | \r | |
202 | if (RequestConfirmed) {\r | |
4610b23a | 203 | mTcgNvs->PhysicalPresence.ReturnCode = TCG_PP_GET_USER_CONFIRMATION_ALLOWED_AND_PPUSER_NOT_REQUIRED;\r |
0c18794e | 204 | } else {\r |
4610b23a | 205 | mTcgNvs->PhysicalPresence.ReturnCode = TCG_PP_GET_USER_CONFIRMATION_ALLOWED_AND_PPUSER_REQUIRED;\r |
b3548d32 | 206 | }\r |
4610b23a JY |
207 | if (mTcgNvs->PhysicalPresence.Request >= TCG_PHYSICAL_PRESENCE_VENDOR_SPECIFIC_OPERATION) {\r |
208 | mTcgNvs->PhysicalPresence.ReturnCode = TcgPpVendorLibGetUserConfirmationStatusFunction (mTcgNvs->PhysicalPresence.Request, Flags.PPFlags);\r | |
209 | }\r | |
b3548d32 | 210 | }\r |
0c18794e | 211 | \r |
212 | return EFI_SUCCESS;\r | |
213 | }\r | |
214 | \r | |
215 | \r | |
216 | /**\r | |
217 | Software SMI callback for MemoryClear which is called from ACPI method.\r | |
218 | \r | |
dc204d5a JY |
219 | Caution: This function may receive untrusted input.\r |
220 | Variable and ACPINvs are external input, so this function will validate\r | |
221 | its data structure to be valid value.\r | |
222 | \r | |
0c18794e | 223 | @param[in] DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r |
224 | @param[in] Context Points to an optional handler context which was specified when the\r | |
225 | handler was registered.\r | |
226 | @param[in, out] CommBuffer A pointer to a collection of data in memory that will\r | |
227 | be conveyed from a non-SMM environment into an SMM environment.\r | |
228 | @param[in, out] CommBufferSize The size of the CommBuffer.\r | |
229 | \r | |
230 | @retval EFI_SUCCESS The interrupt was handled successfully.\r | |
231 | \r | |
232 | **/\r | |
233 | EFI_STATUS\r | |
234 | EFIAPI\r | |
235 | MemoryClearCallback (\r | |
236 | IN EFI_HANDLE DispatchHandle,\r | |
237 | IN CONST VOID *Context,\r | |
238 | IN OUT VOID *CommBuffer,\r | |
239 | IN OUT UINTN *CommBufferSize\r | |
240 | )\r | |
241 | {\r | |
242 | EFI_STATUS Status;\r | |
243 | UINTN DataSize;\r | |
244 | UINT8 MorControl;\r | |
245 | \r | |
82a1e09c | 246 | mTcgNvs->MemoryClear.ReturnCode = MOR_REQUEST_SUCCESS;\r |
247 | if (mTcgNvs->MemoryClear.Parameter == ACPI_FUNCTION_DSM_MEMORY_CLEAR_INTERFACE) {\r | |
0c18794e | 248 | MorControl = (UINT8) mTcgNvs->MemoryClear.Request;\r |
82a1e09c | 249 | } else if (mTcgNvs->MemoryClear.Parameter == ACPI_FUNCTION_PTS_CLEAR_MOR_BIT) {\r |
0c18794e | 250 | DataSize = sizeof (UINT8);\r |
251 | Status = mSmmVariable->SmmGetVariable (\r | |
252 | MEMORY_OVERWRITE_REQUEST_VARIABLE_NAME,\r | |
253 | &gEfiMemoryOverwriteControlDataGuid,\r | |
254 | NULL,\r | |
255 | &DataSize,\r | |
256 | &MorControl\r | |
257 | );\r | |
258 | if (EFI_ERROR (Status)) {\r | |
8a8c6c96 DG |
259 | mTcgNvs->MemoryClear.ReturnCode = MOR_REQUEST_GENERAL_FAILURE;\r |
260 | DEBUG ((EFI_D_ERROR, "[TPM] Get MOR variable failure! Status = %r\n", Status));\r | |
0c18794e | 261 | return EFI_SUCCESS;\r |
262 | }\r | |
263 | \r | |
264 | if (MOR_CLEAR_MEMORY_VALUE (MorControl) == 0x0) {\r | |
265 | return EFI_SUCCESS;\r | |
266 | }\r | |
267 | MorControl &= ~MOR_CLEAR_MEMORY_BIT_MASK;\r | |
831bb137 ZC |
268 | } else {\r |
269 | mTcgNvs->MemoryClear.ReturnCode = MOR_REQUEST_GENERAL_FAILURE;\r | |
270 | DEBUG ((EFI_D_ERROR, "[TPM] MOR Parameter error! Parameter = %x\n", mTcgNvs->MemoryClear.Parameter));\r | |
271 | return EFI_SUCCESS;\r | |
0c18794e | 272 | }\r |
273 | \r | |
274 | DataSize = sizeof (UINT8);\r | |
275 | Status = mSmmVariable->SmmSetVariable (\r | |
276 | MEMORY_OVERWRITE_REQUEST_VARIABLE_NAME,\r | |
277 | &gEfiMemoryOverwriteControlDataGuid,\r | |
278 | EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r | |
279 | DataSize,\r | |
280 | &MorControl\r | |
281 | );\r | |
b3548d32 | 282 | if (EFI_ERROR (Status)) {\r |
82a1e09c | 283 | mTcgNvs->MemoryClear.ReturnCode = MOR_REQUEST_GENERAL_FAILURE;\r |
8a8c6c96 | 284 | DEBUG ((EFI_D_ERROR, "[TPM] Set MOR variable failure! Status = %r\n", Status));\r |
82a1e09c | 285 | }\r |
0c18794e | 286 | \r |
287 | return EFI_SUCCESS;\r | |
288 | }\r | |
289 | \r | |
290 | /**\r | |
291 | Find the operation region in TCG ACPI table by given Name and Size,\r | |
292 | and initialize it if the region is found.\r | |
293 | \r | |
294 | @param[in, out] Table The TPM item in ACPI table.\r | |
295 | @param[in] Name The name string to find in TPM table.\r | |
296 | @param[in] Size The size of the region to find.\r | |
297 | \r | |
298 | @return The allocated address for the found region.\r | |
299 | \r | |
300 | **/\r | |
301 | VOID *\r | |
302 | AssignOpRegion (\r | |
303 | EFI_ACPI_DESCRIPTION_HEADER *Table,\r | |
304 | UINT32 Name,\r | |
305 | UINT16 Size\r | |
306 | )\r | |
307 | {\r | |
308 | EFI_STATUS Status;\r | |
309 | AML_OP_REGION_32_8 *OpRegion;\r | |
310 | EFI_PHYSICAL_ADDRESS MemoryAddress;\r | |
311 | \r | |
312 | MemoryAddress = SIZE_4GB - 1;\r | |
313 | \r | |
314 | //\r | |
315 | // Patch some pointers for the ASL code before loading the SSDT.\r | |
316 | //\r | |
317 | for (OpRegion = (AML_OP_REGION_32_8 *) (Table + 1);\r | |
318 | OpRegion <= (AML_OP_REGION_32_8 *) ((UINT8 *) Table + Table->Length);\r | |
319 | OpRegion = (AML_OP_REGION_32_8 *) ((UINT8 *) OpRegion + 1)) {\r | |
b3548d32 | 320 | if ((OpRegion->OpRegionOp == AML_EXT_REGION_OP) &&\r |
0c18794e | 321 | (OpRegion->NameString == Name) &&\r |
0c18794e | 322 | (OpRegion->DWordPrefix == AML_DWORD_PREFIX) &&\r |
323 | (OpRegion->BytePrefix == AML_BYTE_PREFIX)) {\r | |
324 | \r | |
325 | Status = gBS->AllocatePages(AllocateMaxAddress, EfiACPIMemoryNVS, EFI_SIZE_TO_PAGES (Size), &MemoryAddress);\r | |
326 | ASSERT_EFI_ERROR (Status);\r | |
327 | ZeroMem ((VOID *)(UINTN)MemoryAddress, Size);\r | |
328 | OpRegion->RegionOffset = (UINT32) (UINTN) MemoryAddress;\r | |
82a1e09c | 329 | OpRegion->RegionLen = (UINT8) Size;\r |
0c18794e | 330 | break;\r |
331 | }\r | |
332 | }\r | |
333 | \r | |
334 | return (VOID *) (UINTN) MemoryAddress;\r | |
335 | }\r | |
336 | \r | |
337 | /**\r | |
338 | Initialize and publish TPM items in ACPI table.\r | |
339 | \r | |
340 | @retval EFI_SUCCESS The TCG ACPI table is published successfully.\r | |
341 | @retval Others The TCG ACPI table is not published.\r | |
342 | \r | |
343 | **/\r | |
344 | EFI_STATUS\r | |
345 | PublishAcpiTable (\r | |
346 | VOID\r | |
347 | )\r | |
348 | {\r | |
349 | EFI_STATUS Status;\r | |
350 | EFI_ACPI_TABLE_PROTOCOL *AcpiTable;\r | |
351 | UINTN TableKey;\r | |
352 | EFI_ACPI_DESCRIPTION_HEADER *Table;\r | |
353 | UINTN TableSize;\r | |
354 | \r | |
355 | Status = GetSectionFromFv (\r | |
356 | &gEfiCallerIdGuid,\r | |
357 | EFI_SECTION_RAW,\r | |
358 | 0,\r | |
359 | (VOID **) &Table,\r | |
360 | &TableSize\r | |
361 | );\r | |
362 | ASSERT_EFI_ERROR (Status);\r | |
363 | \r | |
a332cfd3 | 364 | \r |
365 | //\r | |
366 | // Measure to PCR[0] with event EV_POST_CODE ACPI DATA\r | |
367 | //\r | |
368 | TpmMeasureAndLogData(\r | |
369 | 0,\r | |
370 | EV_POST_CODE,\r | |
371 | EV_POSTCODE_INFO_ACPI_DATA,\r | |
372 | ACPI_DATA_LEN,\r | |
373 | Table,\r | |
374 | TableSize\r | |
375 | );\r | |
376 | \r | |
377 | \r | |
0c18794e | 378 | ASSERT (Table->OemTableId == SIGNATURE_64 ('T', 'c', 'g', 'T', 'a', 'b', 'l', 'e'));\r |
e84f07b5 | 379 | CopyMem (Table->OemId, PcdGetPtr (PcdAcpiDefaultOemId), sizeof (Table->OemId) );\r |
0f7f6d23 | 380 | mTcgNvs = AssignOpRegion (Table, SIGNATURE_32 ('T', 'N', 'V', 'S'), (UINT16) sizeof (TCG_NVS));\r |
0c18794e | 381 | ASSERT (mTcgNvs != NULL);\r |
382 | \r | |
383 | //\r | |
384 | // Publish the TPM ACPI table\r | |
385 | //\r | |
386 | Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID **) &AcpiTable);\r | |
387 | ASSERT_EFI_ERROR (Status);\r | |
388 | \r | |
389 | TableKey = 0;\r | |
390 | Status = AcpiTable->InstallAcpiTable (\r | |
391 | AcpiTable,\r | |
392 | Table,\r | |
393 | TableSize,\r | |
394 | &TableKey\r | |
395 | );\r | |
396 | ASSERT_EFI_ERROR (Status);\r | |
397 | \r | |
398 | return Status;\r | |
399 | }\r | |
400 | \r | |
401 | /**\r | |
402 | The driver's entry point.\r | |
403 | \r | |
b3548d32 | 404 | It install callbacks for TPM physical presence and MemoryClear, and locate\r |
0c18794e | 405 | SMM variable to be used in the callback function.\r |
406 | \r | |
b3548d32 | 407 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r |
0c18794e | 408 | @param[in] SystemTable A pointer to the EFI System Table.\r |
b3548d32 | 409 | \r |
0c18794e | 410 | @retval EFI_SUCCESS The entry point is executed successfully.\r |
411 | @retval Others Some error occurs when executing this entry point.\r | |
412 | \r | |
413 | **/\r | |
414 | EFI_STATUS\r | |
415 | EFIAPI\r | |
416 | InitializeTcgSmm (\r | |
417 | IN EFI_HANDLE ImageHandle,\r | |
418 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
419 | )\r | |
420 | {\r | |
421 | EFI_STATUS Status;\r | |
422 | EFI_SMM_SW_DISPATCH2_PROTOCOL *SwDispatch;\r | |
423 | EFI_SMM_SW_REGISTER_CONTEXT SwContext;\r | |
424 | EFI_HANDLE SwHandle;\r | |
425 | \r | |
c1d93242 JY |
426 | if (!CompareGuid (PcdGetPtr(PcdTpmInstanceGuid), &gEfiTpmDeviceInstanceTpm12Guid)){\r |
427 | DEBUG ((EFI_D_ERROR, "No TPM12 instance required!\n"));\r | |
428 | return EFI_UNSUPPORTED;\r | |
429 | }\r | |
430 | \r | |
0c18794e | 431 | Status = PublishAcpiTable ();\r |
432 | ASSERT_EFI_ERROR (Status);\r | |
433 | \r | |
434 | //\r | |
435 | // Get the Sw dispatch protocol and register SMI callback functions.\r | |
436 | //\r | |
437 | Status = gSmst->SmmLocateProtocol (&gEfiSmmSwDispatch2ProtocolGuid, NULL, (VOID**)&SwDispatch);\r | |
438 | ASSERT_EFI_ERROR (Status);\r | |
439 | SwContext.SwSmiInputValue = (UINTN) -1;\r | |
440 | Status = SwDispatch->Register (SwDispatch, PhysicalPresenceCallback, &SwContext, &SwHandle);\r | |
441 | ASSERT_EFI_ERROR (Status);\r | |
442 | if (EFI_ERROR (Status)) {\r | |
443 | return Status;\r | |
444 | }\r | |
445 | mTcgNvs->PhysicalPresence.SoftwareSmi = (UINT8) SwContext.SwSmiInputValue;\r | |
446 | \r | |
447 | SwContext.SwSmiInputValue = (UINTN) -1;\r | |
448 | Status = SwDispatch->Register (SwDispatch, MemoryClearCallback, &SwContext, &SwHandle);\r | |
449 | ASSERT_EFI_ERROR (Status);\r | |
450 | if (EFI_ERROR (Status)) {\r | |
451 | return Status;\r | |
452 | }\r | |
453 | mTcgNvs->MemoryClear.SoftwareSmi = (UINT8) SwContext.SwSmiInputValue;\r | |
b3548d32 | 454 | \r |
0c18794e | 455 | //\r |
456 | // Locate SmmVariableProtocol.\r | |
457 | //\r | |
458 | Status = gSmst->SmmLocateProtocol (&gEfiSmmVariableProtocolGuid, NULL, (VOID**)&mSmmVariable);\r | |
459 | ASSERT_EFI_ERROR (Status);\r | |
460 | \r | |
461 | return EFI_SUCCESS;\r | |
462 | }\r | |
463 | \r |