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1abfa4ce JY |
1 | /** @file\r |
2 | It updates TPM2 items in ACPI table and registers SMI2 callback\r | |
3 | functions for Tcg2 physical presence, ClearMemory, and sample\r | |
4 | for dTPM StartMethod.\r | |
5 | \r | |
6 | Caution: This module requires additional review when modified.\r | |
7 | This driver will have external input - variable and ACPINvs data in SMM mode.\r | |
8 | This external input must be validated carefully to avoid security issue.\r | |
9 | \r | |
10 | PhysicalPresenceCallback() and MemoryClearCallback() will receive untrusted input and do some check.\r | |
11 | \r | |
d967d6d9 | 12 | Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>\r |
1abfa4ce JY |
13 | This program and the accompanying materials \r |
14 | are licensed and made available under the terms and conditions of the BSD License \r | |
15 | which accompanies this distribution. The full text of the license may be found at \r | |
16 | http://opensource.org/licenses/bsd-license.php\r | |
17 | \r | |
18 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
19 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
20 | \r | |
21 | **/\r | |
22 | \r | |
23 | #include "Tcg2Smm.h"\r | |
24 | \r | |
d967d6d9 JY |
25 | typedef enum {\r |
26 | PtpInterfaceTis,\r | |
27 | PtpInterfaceFifo,\r | |
28 | PtpInterfaceCrb,\r | |
29 | PtpInterfaceMax,\r | |
30 | } PTP_INTERFACE_TYPE;\r | |
31 | \r | |
32 | /**\r | |
33 | Return PTP interface type.\r | |
34 | \r | |
35 | @param[in] Register Pointer to PTP register.\r | |
36 | \r | |
37 | @return PTP interface type.\r | |
38 | **/\r | |
39 | PTP_INTERFACE_TYPE\r | |
40 | GetPtpInterface (\r | |
41 | IN VOID *Register\r | |
42 | )\r | |
43 | {\r | |
44 | PTP_CRB_INTERFACE_IDENTIFIER InterfaceId;\r | |
45 | PTP_FIFO_INTERFACE_CAPABILITY InterfaceCapability;\r | |
46 | \r | |
47 | //\r | |
48 | // Check interface id\r | |
49 | //\r | |
50 | InterfaceId.Uint32 = MmioRead32 ((UINTN)&((PTP_CRB_REGISTERS *)Register)->InterfaceId);\r | |
51 | InterfaceCapability.Uint32 = MmioRead32 ((UINTN)&((PTP_FIFO_REGISTERS *)Register)->InterfaceCapability);\r | |
52 | \r | |
53 | if ((InterfaceId.Bits.InterfaceType == PTP_INTERFACE_IDENTIFIER_INTERFACE_TYPE_CRB) &&\r | |
54 | (InterfaceId.Bits.InterfaceVersion == PTP_INTERFACE_IDENTIFIER_INTERFACE_VERSION_CRB) &&\r | |
55 | (InterfaceId.Bits.CapCRB != 0)) {\r | |
56 | return PtpInterfaceCrb;\r | |
57 | }\r | |
58 | if ((InterfaceId.Bits.InterfaceType == PTP_INTERFACE_IDENTIFIER_INTERFACE_TYPE_FIFO) &&\r | |
59 | (InterfaceId.Bits.InterfaceVersion == PTP_INTERFACE_IDENTIFIER_INTERFACE_VERSION_FIFO) &&\r | |
60 | (InterfaceId.Bits.CapFIFO != 0) &&\r | |
61 | (InterfaceCapability.Bits.InterfaceVersion == INTERFACE_CAPABILITY_INTERFACE_VERSION_PTP)) {\r | |
62 | return PtpInterfaceFifo;\r | |
63 | }\r | |
64 | return PtpInterfaceTis;\r | |
65 | }\r | |
66 | \r | |
1abfa4ce JY |
67 | EFI_TPM2_ACPI_TABLE mTpm2AcpiTemplate = {\r |
68 | {\r | |
69 | EFI_ACPI_5_0_TRUSTED_COMPUTING_PLATFORM_2_TABLE_SIGNATURE,\r | |
70 | sizeof (mTpm2AcpiTemplate),\r | |
71 | EFI_TPM2_ACPI_TABLE_REVISION,\r | |
72 | //\r | |
73 | // Compiler initializes the remaining bytes to 0\r | |
74 | // These fields should be filled in in production\r | |
75 | //\r | |
76 | },\r | |
77 | 0, // Flags\r | |
78 | 0, // Control Area\r | |
79 | EFI_TPM2_ACPI_TABLE_START_METHOD_TIS, // StartMethod\r | |
80 | };\r | |
81 | \r | |
82 | EFI_SMM_VARIABLE_PROTOCOL *mSmmVariable;\r | |
83 | TCG_NVS *mTcgNvs;\r | |
84 | \r | |
85 | /**\r | |
86 | Software SMI callback for TPM physical presence which is called from ACPI method.\r | |
87 | \r | |
88 | Caution: This function may receive untrusted input.\r | |
89 | Variable and ACPINvs are external input, so this function will validate\r | |
90 | its data structure to be valid value.\r | |
91 | \r | |
92 | @param[in] DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r | |
93 | @param[in] Context Points to an optional handler context which was specified when the\r | |
94 | handler was registered.\r | |
95 | @param[in, out] CommBuffer A pointer to a collection of data in memory that will\r | |
96 | be conveyed from a non-SMM environment into an SMM environment.\r | |
97 | @param[in, out] CommBufferSize The size of the CommBuffer.\r | |
98 | \r | |
99 | @retval EFI_SUCCESS The interrupt was handled successfully.\r | |
100 | \r | |
101 | **/\r | |
102 | EFI_STATUS\r | |
103 | EFIAPI\r | |
104 | PhysicalPresenceCallback (\r | |
105 | IN EFI_HANDLE DispatchHandle,\r | |
106 | IN CONST VOID *Context,\r | |
107 | IN OUT VOID *CommBuffer,\r | |
108 | IN OUT UINTN *CommBufferSize\r | |
109 | )\r | |
110 | {\r | |
111 | UINT32 MostRecentRequest;\r | |
112 | UINT32 Response;\r | |
113 | \r | |
114 | if (mTcgNvs->PhysicalPresence.Parameter == TCG_ACPI_FUNCTION_RETURN_REQUEST_RESPONSE_TO_OS) {\r | |
115 | mTcgNvs->PhysicalPresence.ReturnCode = Tcg2PhysicalPresenceLibReturnOperationResponseToOsFunction (\r | |
116 | &MostRecentRequest,\r | |
117 | &Response\r | |
118 | );\r | |
119 | mTcgNvs->PhysicalPresence.LastRequest = MostRecentRequest;\r | |
120 | mTcgNvs->PhysicalPresence.Response = Response;\r | |
121 | return EFI_SUCCESS;\r | |
122 | } else if ((mTcgNvs->PhysicalPresence.Parameter == TCG_ACPI_FUNCTION_SUBMIT_REQUEST_TO_BIOS) \r | |
123 | || (mTcgNvs->PhysicalPresence.Parameter == TCG_ACPI_FUNCTION_SUBMIT_REQUEST_TO_BIOS_2)) {\r | |
124 | mTcgNvs->PhysicalPresence.ReturnCode = Tcg2PhysicalPresenceLibSubmitRequestToPreOSFunction (\r | |
125 | mTcgNvs->PhysicalPresence.Request,\r | |
126 | mTcgNvs->PhysicalPresence.RequestParameter\r | |
127 | );\r | |
128 | } else if (mTcgNvs->PhysicalPresence.Parameter == TCG_ACPI_FUNCTION_GET_USER_CONFIRMATION_STATUS_FOR_REQUEST) {\r | |
129 | mTcgNvs->PhysicalPresence.ReturnCode = Tcg2PhysicalPresenceLibGetUserConfirmationStatusFunction (mTcgNvs->PhysicalPresence.Request);\r | |
130 | } \r | |
131 | \r | |
132 | return EFI_SUCCESS;\r | |
133 | }\r | |
134 | \r | |
135 | \r | |
136 | /**\r | |
137 | Software SMI callback for MemoryClear which is called from ACPI method.\r | |
138 | \r | |
139 | Caution: This function may receive untrusted input.\r | |
140 | Variable and ACPINvs are external input, so this function will validate\r | |
141 | its data structure to be valid value.\r | |
142 | \r | |
143 | @param[in] DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r | |
144 | @param[in] Context Points to an optional handler context which was specified when the\r | |
145 | handler was registered.\r | |
146 | @param[in, out] CommBuffer A pointer to a collection of data in memory that will\r | |
147 | be conveyed from a non-SMM environment into an SMM environment.\r | |
148 | @param[in, out] CommBufferSize The size of the CommBuffer.\r | |
149 | \r | |
150 | @retval EFI_SUCCESS The interrupt was handled successfully.\r | |
151 | \r | |
152 | **/\r | |
153 | EFI_STATUS\r | |
154 | EFIAPI\r | |
155 | MemoryClearCallback (\r | |
156 | IN EFI_HANDLE DispatchHandle,\r | |
157 | IN CONST VOID *Context,\r | |
158 | IN OUT VOID *CommBuffer,\r | |
159 | IN OUT UINTN *CommBufferSize\r | |
160 | )\r | |
161 | {\r | |
162 | EFI_STATUS Status;\r | |
163 | UINTN DataSize;\r | |
164 | UINT8 MorControl;\r | |
165 | \r | |
166 | mTcgNvs->MemoryClear.ReturnCode = MOR_REQUEST_SUCCESS;\r | |
167 | if (mTcgNvs->MemoryClear.Parameter == ACPI_FUNCTION_DSM_MEMORY_CLEAR_INTERFACE) {\r | |
168 | MorControl = (UINT8) mTcgNvs->MemoryClear.Request;\r | |
169 | } else if (mTcgNvs->MemoryClear.Parameter == ACPI_FUNCTION_PTS_CLEAR_MOR_BIT) {\r | |
170 | DataSize = sizeof (UINT8);\r | |
171 | Status = mSmmVariable->SmmGetVariable (\r | |
172 | MEMORY_OVERWRITE_REQUEST_VARIABLE_NAME,\r | |
173 | &gEfiMemoryOverwriteControlDataGuid,\r | |
174 | NULL,\r | |
175 | &DataSize,\r | |
176 | &MorControl\r | |
177 | );\r | |
178 | if (EFI_ERROR (Status)) {\r | |
179 | mTcgNvs->MemoryClear.ReturnCode = MOR_REQUEST_GENERAL_FAILURE;\r | |
180 | DEBUG ((EFI_D_ERROR, "[TPM] Get MOR variable failure! Status = %r\n", Status));\r | |
181 | return EFI_SUCCESS;\r | |
182 | }\r | |
183 | \r | |
184 | if (MOR_CLEAR_MEMORY_VALUE (MorControl) == 0x0) {\r | |
185 | return EFI_SUCCESS;\r | |
186 | }\r | |
187 | MorControl &= ~MOR_CLEAR_MEMORY_BIT_MASK;\r | |
188 | }\r | |
189 | \r | |
190 | DataSize = sizeof (UINT8);\r | |
191 | Status = mSmmVariable->SmmSetVariable (\r | |
192 | MEMORY_OVERWRITE_REQUEST_VARIABLE_NAME,\r | |
193 | &gEfiMemoryOverwriteControlDataGuid,\r | |
194 | EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r | |
195 | DataSize,\r | |
196 | &MorControl\r | |
197 | );\r | |
198 | if (EFI_ERROR (Status)) { \r | |
199 | mTcgNvs->MemoryClear.ReturnCode = MOR_REQUEST_GENERAL_FAILURE;\r | |
200 | DEBUG ((EFI_D_ERROR, "[TPM] Set MOR variable failure! Status = %r\n", Status));\r | |
201 | }\r | |
202 | \r | |
203 | return EFI_SUCCESS;\r | |
204 | }\r | |
205 | \r | |
206 | /**\r | |
207 | Find the operation region in TCG ACPI table by given Name and Size,\r | |
208 | and initialize it if the region is found.\r | |
209 | \r | |
210 | @param[in, out] Table The TPM item in ACPI table.\r | |
211 | @param[in] Name The name string to find in TPM table.\r | |
212 | @param[in] Size The size of the region to find.\r | |
213 | \r | |
214 | @return The allocated address for the found region.\r | |
215 | \r | |
216 | **/\r | |
217 | VOID *\r | |
218 | AssignOpRegion (\r | |
219 | EFI_ACPI_DESCRIPTION_HEADER *Table,\r | |
220 | UINT32 Name,\r | |
221 | UINT16 Size\r | |
222 | )\r | |
223 | {\r | |
224 | EFI_STATUS Status;\r | |
225 | AML_OP_REGION_32_8 *OpRegion;\r | |
226 | EFI_PHYSICAL_ADDRESS MemoryAddress;\r | |
227 | \r | |
228 | MemoryAddress = SIZE_4GB - 1;\r | |
229 | \r | |
230 | //\r | |
231 | // Patch some pointers for the ASL code before loading the SSDT.\r | |
232 | //\r | |
233 | for (OpRegion = (AML_OP_REGION_32_8 *) (Table + 1);\r | |
234 | OpRegion <= (AML_OP_REGION_32_8 *) ((UINT8 *) Table + Table->Length);\r | |
235 | OpRegion = (AML_OP_REGION_32_8 *) ((UINT8 *) OpRegion + 1)) {\r | |
236 | if ((OpRegion->OpRegionOp == AML_EXT_REGION_OP) && \r | |
237 | (OpRegion->NameString == Name) &&\r | |
238 | (OpRegion->DWordPrefix == AML_DWORD_PREFIX) &&\r | |
239 | (OpRegion->BytePrefix == AML_BYTE_PREFIX)) {\r | |
240 | \r | |
241 | Status = gBS->AllocatePages(AllocateMaxAddress, EfiACPIMemoryNVS, EFI_SIZE_TO_PAGES (Size), &MemoryAddress);\r | |
242 | ASSERT_EFI_ERROR (Status);\r | |
243 | ZeroMem ((VOID *)(UINTN)MemoryAddress, Size);\r | |
244 | OpRegion->RegionOffset = (UINT32) (UINTN) MemoryAddress;\r | |
245 | OpRegion->RegionLen = (UINT8) Size;\r | |
246 | break;\r | |
247 | }\r | |
248 | }\r | |
249 | \r | |
250 | return (VOID *) (UINTN) MemoryAddress;\r | |
251 | }\r | |
252 | \r | |
253 | /**\r | |
254 | Initialize and publish TPM items in ACPI table.\r | |
255 | \r | |
256 | @retval EFI_SUCCESS The TCG ACPI table is published successfully.\r | |
257 | @retval Others The TCG ACPI table is not published.\r | |
258 | \r | |
259 | **/\r | |
260 | EFI_STATUS\r | |
261 | PublishAcpiTable (\r | |
262 | VOID\r | |
263 | )\r | |
264 | {\r | |
265 | EFI_STATUS Status;\r | |
266 | EFI_ACPI_TABLE_PROTOCOL *AcpiTable;\r | |
267 | UINTN TableKey;\r | |
268 | EFI_ACPI_DESCRIPTION_HEADER *Table;\r | |
269 | UINTN TableSize;\r | |
270 | \r | |
271 | Status = GetSectionFromFv (\r | |
272 | &gEfiCallerIdGuid,\r | |
273 | EFI_SECTION_RAW,\r | |
274 | 0,\r | |
275 | (VOID **) &Table,\r | |
276 | &TableSize\r | |
277 | );\r | |
278 | ASSERT_EFI_ERROR (Status);\r | |
279 | \r | |
280 | \r | |
281 | //\r | |
282 | // Measure to PCR[0] with event EV_POST_CODE ACPI DATA\r | |
283 | //\r | |
284 | TpmMeasureAndLogData(\r | |
285 | 0,\r | |
286 | EV_POST_CODE,\r | |
287 | EV_POSTCODE_INFO_ACPI_DATA,\r | |
288 | ACPI_DATA_LEN,\r | |
289 | Table,\r | |
290 | TableSize\r | |
291 | );\r | |
292 | \r | |
293 | \r | |
294 | ASSERT (Table->OemTableId == SIGNATURE_64 ('T', 'p', 'm', '2', 'T', 'a', 'b', 'l'));\r | |
295 | CopyMem (Table->OemId, PcdGetPtr (PcdAcpiDefaultOemId), sizeof (Table->OemId) );\r | |
296 | mTcgNvs = AssignOpRegion (Table, SIGNATURE_32 ('T', 'N', 'V', 'S'), (UINT16) sizeof (TCG_NVS));\r | |
297 | ASSERT (mTcgNvs != NULL);\r | |
298 | \r | |
299 | //\r | |
300 | // Publish the TPM ACPI table\r | |
301 | //\r | |
302 | Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID **) &AcpiTable);\r | |
303 | ASSERT_EFI_ERROR (Status);\r | |
304 | \r | |
305 | TableKey = 0;\r | |
306 | Status = AcpiTable->InstallAcpiTable (\r | |
307 | AcpiTable,\r | |
308 | Table,\r | |
309 | TableSize,\r | |
310 | &TableKey\r | |
311 | );\r | |
312 | ASSERT_EFI_ERROR (Status);\r | |
313 | \r | |
314 | return Status;\r | |
315 | }\r | |
316 | \r | |
317 | /**\r | |
318 | Publish TPM2 ACPI table\r | |
319 | \r | |
320 | @retval EFI_SUCCESS The TPM2 ACPI table is published successfully.\r | |
321 | @retval Others The TPM2 ACPI table is not published.\r | |
322 | \r | |
323 | **/\r | |
324 | EFI_STATUS\r | |
325 | PublishTpm2 (\r | |
326 | VOID\r | |
327 | )\r | |
328 | {\r | |
329 | EFI_STATUS Status;\r | |
330 | EFI_ACPI_TABLE_PROTOCOL *AcpiTable;\r | |
331 | UINTN TableKey;\r | |
332 | UINT64 OemTableId;\r | |
d967d6d9 JY |
333 | EFI_TPM2_ACPI_CONTROL_AREA *ControlArea;\r |
334 | PTP_INTERFACE_TYPE InterfaceType;\r | |
1abfa4ce JY |
335 | \r |
336 | //\r | |
337 | // Measure to PCR[0] with event EV_POST_CODE ACPI DATA\r | |
338 | //\r | |
339 | TpmMeasureAndLogData(\r | |
340 | 0,\r | |
341 | EV_POST_CODE,\r | |
342 | EV_POSTCODE_INFO_ACPI_DATA,\r | |
343 | ACPI_DATA_LEN,\r | |
344 | &mTpm2AcpiTemplate,\r | |
345 | sizeof(mTpm2AcpiTemplate)\r | |
346 | );\r | |
347 | \r | |
d967d6d9 JY |
348 | InterfaceType = GetPtpInterface ((VOID *) (UINTN) PcdGet64 (PcdTpmBaseAddress));\r |
349 | switch (InterfaceType) {\r | |
350 | case PtpInterfaceCrb:\r | |
351 | mTpm2AcpiTemplate.StartMethod = EFI_TPM2_ACPI_TABLE_START_METHOD_COMMAND_RESPONSE_BUFFER_INTERFACE;\r | |
352 | mTpm2AcpiTemplate.AddressOfControlArea = PcdGet64 (PcdTpmBaseAddress) + 0x40;\r | |
353 | ControlArea = (EFI_TPM2_ACPI_CONTROL_AREA *)(UINTN)mTpm2AcpiTemplate.AddressOfControlArea;\r | |
354 | ControlArea->CommandSize = 0xF80;\r | |
355 | ControlArea->ResponseSize = 0xF80;\r | |
356 | ControlArea->Command = PcdGet64 (PcdTpmBaseAddress) + 0x80;\r | |
357 | ControlArea->Response = PcdGet64 (PcdTpmBaseAddress) + 0x80;\r | |
358 | break;\r | |
359 | case PtpInterfaceFifo:\r | |
360 | case PtpInterfaceTis:\r | |
361 | break;\r | |
362 | default:\r | |
363 | break;\r | |
364 | }\r | |
365 | \r | |
1abfa4ce JY |
366 | CopyMem (mTpm2AcpiTemplate.Header.OemId, PcdGetPtr (PcdAcpiDefaultOemId), sizeof (mTpm2AcpiTemplate.Header.OemId));\r |
367 | OemTableId = PcdGet64 (PcdAcpiDefaultOemTableId);\r | |
368 | CopyMem (&mTpm2AcpiTemplate.Header.OemTableId, &OemTableId, sizeof (UINT64));\r | |
369 | mTpm2AcpiTemplate.Header.OemRevision = PcdGet32 (PcdAcpiDefaultOemRevision);\r | |
370 | mTpm2AcpiTemplate.Header.CreatorId = PcdGet32 (PcdAcpiDefaultCreatorId);\r | |
371 | mTpm2AcpiTemplate.Header.CreatorRevision = PcdGet32 (PcdAcpiDefaultCreatorRevision);\r | |
372 | \r | |
373 | //\r | |
374 | // Construct ACPI table\r | |
375 | //\r | |
376 | Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID **) &AcpiTable);\r | |
377 | ASSERT_EFI_ERROR (Status);\r | |
378 | \r | |
379 | Status = AcpiTable->InstallAcpiTable (\r | |
380 | AcpiTable,\r | |
381 | &mTpm2AcpiTemplate,\r | |
382 | sizeof(mTpm2AcpiTemplate),\r | |
383 | &TableKey\r | |
384 | );\r | |
385 | ASSERT_EFI_ERROR (Status);\r | |
386 | \r | |
387 | return Status;\r | |
388 | }\r | |
389 | \r | |
390 | /**\r | |
391 | The driver's entry point.\r | |
392 | \r | |
393 | It install callbacks for TPM physical presence and MemoryClear, and locate \r | |
394 | SMM variable to be used in the callback function.\r | |
395 | \r | |
396 | @param[in] ImageHandle The firmware allocated handle for the EFI image. \r | |
397 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
398 | \r | |
399 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
400 | @retval Others Some error occurs when executing this entry point.\r | |
401 | \r | |
402 | **/\r | |
403 | EFI_STATUS\r | |
404 | EFIAPI\r | |
405 | InitializeTcgSmm (\r | |
406 | IN EFI_HANDLE ImageHandle,\r | |
407 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
408 | )\r | |
409 | {\r | |
410 | EFI_STATUS Status;\r | |
411 | EFI_SMM_SW_DISPATCH2_PROTOCOL *SwDispatch;\r | |
412 | EFI_SMM_SW_REGISTER_CONTEXT SwContext;\r | |
413 | EFI_HANDLE SwHandle;\r | |
414 | \r | |
415 | if (!CompareGuid (PcdGetPtr(PcdTpmInstanceGuid), &gEfiTpmDeviceInstanceTpm20DtpmGuid)){\r | |
416 | DEBUG ((EFI_D_ERROR, "No TPM2 DTPM instance required!\n"));\r | |
417 | return EFI_UNSUPPORTED;\r | |
418 | }\r | |
419 | \r | |
420 | Status = PublishAcpiTable ();\r | |
421 | ASSERT_EFI_ERROR (Status);\r | |
422 | \r | |
423 | //\r | |
424 | // Get the Sw dispatch protocol and register SMI callback functions.\r | |
425 | //\r | |
426 | Status = gSmst->SmmLocateProtocol (&gEfiSmmSwDispatch2ProtocolGuid, NULL, (VOID**)&SwDispatch);\r | |
427 | ASSERT_EFI_ERROR (Status);\r | |
428 | SwContext.SwSmiInputValue = (UINTN) -1;\r | |
429 | Status = SwDispatch->Register (SwDispatch, PhysicalPresenceCallback, &SwContext, &SwHandle);\r | |
430 | ASSERT_EFI_ERROR (Status);\r | |
431 | if (EFI_ERROR (Status)) {\r | |
432 | return Status;\r | |
433 | }\r | |
434 | mTcgNvs->PhysicalPresence.SoftwareSmi = (UINT8) SwContext.SwSmiInputValue;\r | |
435 | \r | |
436 | SwContext.SwSmiInputValue = (UINTN) -1;\r | |
437 | Status = SwDispatch->Register (SwDispatch, MemoryClearCallback, &SwContext, &SwHandle);\r | |
438 | ASSERT_EFI_ERROR (Status);\r | |
439 | if (EFI_ERROR (Status)) {\r | |
440 | return Status;\r | |
441 | }\r | |
442 | mTcgNvs->MemoryClear.SoftwareSmi = (UINT8) SwContext.SwSmiInputValue;\r | |
443 | \r | |
444 | //\r | |
445 | // Locate SmmVariableProtocol.\r | |
446 | //\r | |
447 | Status = gSmst->SmmLocateProtocol (&gEfiSmmVariableProtocolGuid, NULL, (VOID**)&mSmmVariable);\r | |
448 | ASSERT_EFI_ERROR (Status);\r | |
449 | \r | |
450 | //\r | |
451 | // Set TPM2 ACPI table\r | |
452 | //\r | |
453 | Status = PublishTpm2 ();\r | |
454 | ASSERT_EFI_ERROR (Status);\r | |
455 | \r | |
456 | \r | |
457 | return EFI_SUCCESS;\r | |
458 | }\r | |
459 | \r |