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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 | |
c4122dca | 12 | Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>\r |
b3548d32 LG |
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 | |
1abfa4ce JY |
16 | http://opensource.org/licenses/bsd-license.php\r |
17 | \r | |
b3548d32 | 18 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
1abfa4ce JY |
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 | 25 | \r |
1abfa4ce JY |
26 | EFI_TPM2_ACPI_TABLE mTpm2AcpiTemplate = {\r |
27 | {\r | |
28 | EFI_ACPI_5_0_TRUSTED_COMPUTING_PLATFORM_2_TABLE_SIGNATURE,\r | |
29 | sizeof (mTpm2AcpiTemplate),\r | |
07727373 | 30 | EFI_TPM2_ACPI_TABLE_REVISION,\r |
1abfa4ce JY |
31 | //\r |
32 | // Compiler initializes the remaining bytes to 0\r | |
33 | // These fields should be filled in in production\r | |
34 | //\r | |
35 | },\r | |
07727373 ZC |
36 | 0, // BIT0~15: PlatformClass\r |
37 | // BIT16~31: Reserved\r | |
1abfa4ce JY |
38 | 0, // Control Area\r |
39 | EFI_TPM2_ACPI_TABLE_START_METHOD_TIS, // StartMethod\r | |
40 | };\r | |
41 | \r | |
42 | EFI_SMM_VARIABLE_PROTOCOL *mSmmVariable;\r | |
43 | TCG_NVS *mTcgNvs;\r | |
44 | \r | |
45 | /**\r | |
46 | Software SMI callback for TPM physical presence which is called from ACPI method.\r | |
47 | \r | |
48 | Caution: This function may receive untrusted input.\r | |
49 | Variable and ACPINvs are external input, so this function will validate\r | |
50 | its data structure to be valid value.\r | |
51 | \r | |
52 | @param[in] DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r | |
53 | @param[in] Context Points to an optional handler context which was specified when the\r | |
54 | handler was registered.\r | |
55 | @param[in, out] CommBuffer A pointer to a collection of data in memory that will\r | |
56 | be conveyed from a non-SMM environment into an SMM environment.\r | |
57 | @param[in, out] CommBufferSize The size of the CommBuffer.\r | |
58 | \r | |
59 | @retval EFI_SUCCESS The interrupt was handled successfully.\r | |
60 | \r | |
61 | **/\r | |
62 | EFI_STATUS\r | |
63 | EFIAPI\r | |
64 | PhysicalPresenceCallback (\r | |
65 | IN EFI_HANDLE DispatchHandle,\r | |
66 | IN CONST VOID *Context,\r | |
67 | IN OUT VOID *CommBuffer,\r | |
68 | IN OUT UINTN *CommBufferSize\r | |
69 | )\r | |
70 | {\r | |
71 | UINT32 MostRecentRequest;\r | |
72 | UINT32 Response;\r | |
edb0fda2 ZC |
73 | UINT32 OperationRequest;\r |
74 | UINT32 RequestParameter;\r | |
75 | \r | |
1abfa4ce JY |
76 | \r |
77 | if (mTcgNvs->PhysicalPresence.Parameter == TCG_ACPI_FUNCTION_RETURN_REQUEST_RESPONSE_TO_OS) {\r | |
78 | mTcgNvs->PhysicalPresence.ReturnCode = Tcg2PhysicalPresenceLibReturnOperationResponseToOsFunction (\r | |
79 | &MostRecentRequest,\r | |
80 | &Response\r | |
81 | );\r | |
82 | mTcgNvs->PhysicalPresence.LastRequest = MostRecentRequest;\r | |
83 | mTcgNvs->PhysicalPresence.Response = Response;\r | |
84 | return EFI_SUCCESS;\r | |
b3548d32 | 85 | } else if ((mTcgNvs->PhysicalPresence.Parameter == TCG_ACPI_FUNCTION_SUBMIT_REQUEST_TO_BIOS)\r |
1abfa4ce | 86 | || (mTcgNvs->PhysicalPresence.Parameter == TCG_ACPI_FUNCTION_SUBMIT_REQUEST_TO_BIOS_2)) {\r |
edb0fda2 ZC |
87 | \r |
88 | OperationRequest = mTcgNvs->PhysicalPresence.Request;\r | |
89 | RequestParameter = mTcgNvs->PhysicalPresence.RequestParameter;\r | |
90 | mTcgNvs->PhysicalPresence.ReturnCode = Tcg2PhysicalPresenceLibSubmitRequestToPreOSFunctionEx (\r | |
91 | &OperationRequest,\r | |
92 | &RequestParameter\r | |
1abfa4ce | 93 | );\r |
edb0fda2 ZC |
94 | mTcgNvs->PhysicalPresence.Request = OperationRequest;\r |
95 | mTcgNvs->PhysicalPresence.RequestParameter = RequestParameter;\r | |
1abfa4ce | 96 | } else if (mTcgNvs->PhysicalPresence.Parameter == TCG_ACPI_FUNCTION_GET_USER_CONFIRMATION_STATUS_FOR_REQUEST) {\r |
053f31e3 ZC |
97 | mTcgNvs->PhysicalPresence.ReturnCode = Tcg2PhysicalPresenceLibGetUserConfirmationStatusFunction (mTcgNvs->PPRequestUserConfirm);\r |
98 | }\r | |
1abfa4ce JY |
99 | \r |
100 | return EFI_SUCCESS;\r | |
101 | }\r | |
102 | \r | |
103 | \r | |
104 | /**\r | |
105 | Software SMI callback for MemoryClear which is called from ACPI method.\r | |
106 | \r | |
107 | Caution: This function may receive untrusted input.\r | |
108 | Variable and ACPINvs are external input, so this function will validate\r | |
109 | its data structure to be valid value.\r | |
110 | \r | |
111 | @param[in] DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r | |
112 | @param[in] Context Points to an optional handler context which was specified when the\r | |
113 | handler was registered.\r | |
114 | @param[in, out] CommBuffer A pointer to a collection of data in memory that will\r | |
115 | be conveyed from a non-SMM environment into an SMM environment.\r | |
116 | @param[in, out] CommBufferSize The size of the CommBuffer.\r | |
117 | \r | |
118 | @retval EFI_SUCCESS The interrupt was handled successfully.\r | |
119 | \r | |
120 | **/\r | |
121 | EFI_STATUS\r | |
122 | EFIAPI\r | |
123 | MemoryClearCallback (\r | |
124 | IN EFI_HANDLE DispatchHandle,\r | |
125 | IN CONST VOID *Context,\r | |
126 | IN OUT VOID *CommBuffer,\r | |
127 | IN OUT UINTN *CommBufferSize\r | |
128 | )\r | |
129 | {\r | |
130 | EFI_STATUS Status;\r | |
131 | UINTN DataSize;\r | |
132 | UINT8 MorControl;\r | |
133 | \r | |
134 | mTcgNvs->MemoryClear.ReturnCode = MOR_REQUEST_SUCCESS;\r | |
135 | if (mTcgNvs->MemoryClear.Parameter == ACPI_FUNCTION_DSM_MEMORY_CLEAR_INTERFACE) {\r | |
136 | MorControl = (UINT8) mTcgNvs->MemoryClear.Request;\r | |
137 | } else if (mTcgNvs->MemoryClear.Parameter == ACPI_FUNCTION_PTS_CLEAR_MOR_BIT) {\r | |
138 | DataSize = sizeof (UINT8);\r | |
139 | Status = mSmmVariable->SmmGetVariable (\r | |
140 | MEMORY_OVERWRITE_REQUEST_VARIABLE_NAME,\r | |
141 | &gEfiMemoryOverwriteControlDataGuid,\r | |
142 | NULL,\r | |
143 | &DataSize,\r | |
144 | &MorControl\r | |
145 | );\r | |
146 | if (EFI_ERROR (Status)) {\r | |
147 | mTcgNvs->MemoryClear.ReturnCode = MOR_REQUEST_GENERAL_FAILURE;\r | |
148 | DEBUG ((EFI_D_ERROR, "[TPM] Get MOR variable failure! Status = %r\n", Status));\r | |
149 | return EFI_SUCCESS;\r | |
150 | }\r | |
151 | \r | |
152 | if (MOR_CLEAR_MEMORY_VALUE (MorControl) == 0x0) {\r | |
153 | return EFI_SUCCESS;\r | |
154 | }\r | |
155 | MorControl &= ~MOR_CLEAR_MEMORY_BIT_MASK;\r | |
156 | }\r | |
157 | \r | |
158 | DataSize = sizeof (UINT8);\r | |
159 | Status = mSmmVariable->SmmSetVariable (\r | |
160 | MEMORY_OVERWRITE_REQUEST_VARIABLE_NAME,\r | |
161 | &gEfiMemoryOverwriteControlDataGuid,\r | |
162 | EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r | |
163 | DataSize,\r | |
164 | &MorControl\r | |
165 | );\r | |
b3548d32 | 166 | if (EFI_ERROR (Status)) {\r |
1abfa4ce JY |
167 | mTcgNvs->MemoryClear.ReturnCode = MOR_REQUEST_GENERAL_FAILURE;\r |
168 | DEBUG ((EFI_D_ERROR, "[TPM] Set MOR variable failure! Status = %r\n", Status));\r | |
169 | }\r | |
170 | \r | |
171 | return EFI_SUCCESS;\r | |
172 | }\r | |
173 | \r | |
174 | /**\r | |
175 | Find the operation region in TCG ACPI table by given Name and Size,\r | |
176 | and initialize it if the region is found.\r | |
177 | \r | |
178 | @param[in, out] Table The TPM item in ACPI table.\r | |
179 | @param[in] Name The name string to find in TPM table.\r | |
180 | @param[in] Size The size of the region to find.\r | |
181 | \r | |
182 | @return The allocated address for the found region.\r | |
183 | \r | |
184 | **/\r | |
185 | VOID *\r | |
186 | AssignOpRegion (\r | |
187 | EFI_ACPI_DESCRIPTION_HEADER *Table,\r | |
188 | UINT32 Name,\r | |
189 | UINT16 Size\r | |
190 | )\r | |
191 | {\r | |
192 | EFI_STATUS Status;\r | |
193 | AML_OP_REGION_32_8 *OpRegion;\r | |
194 | EFI_PHYSICAL_ADDRESS MemoryAddress;\r | |
195 | \r | |
196 | MemoryAddress = SIZE_4GB - 1;\r | |
197 | \r | |
198 | //\r | |
199 | // Patch some pointers for the ASL code before loading the SSDT.\r | |
200 | //\r | |
201 | for (OpRegion = (AML_OP_REGION_32_8 *) (Table + 1);\r | |
202 | OpRegion <= (AML_OP_REGION_32_8 *) ((UINT8 *) Table + Table->Length);\r | |
203 | OpRegion = (AML_OP_REGION_32_8 *) ((UINT8 *) OpRegion + 1)) {\r | |
b3548d32 | 204 | if ((OpRegion->OpRegionOp == AML_EXT_REGION_OP) &&\r |
1abfa4ce JY |
205 | (OpRegion->NameString == Name) &&\r |
206 | (OpRegion->DWordPrefix == AML_DWORD_PREFIX) &&\r | |
207 | (OpRegion->BytePrefix == AML_BYTE_PREFIX)) {\r | |
208 | \r | |
209 | Status = gBS->AllocatePages(AllocateMaxAddress, EfiACPIMemoryNVS, EFI_SIZE_TO_PAGES (Size), &MemoryAddress);\r | |
210 | ASSERT_EFI_ERROR (Status);\r | |
211 | ZeroMem ((VOID *)(UINTN)MemoryAddress, Size);\r | |
212 | OpRegion->RegionOffset = (UINT32) (UINTN) MemoryAddress;\r | |
213 | OpRegion->RegionLen = (UINT8) Size;\r | |
214 | break;\r | |
215 | }\r | |
216 | }\r | |
217 | \r | |
218 | return (VOID *) (UINTN) MemoryAddress;\r | |
219 | }\r | |
220 | \r | |
cd643013 | 221 | /**\r |
b3548d32 | 222 | Patch version string of Physical Presence interface supported by platform. The initial string tag in TPM\r |
cd643013 ZC |
223 | ACPI table is "$PV".\r |
224 | \r | |
225 | @param[in, out] Table The TPM item in ACPI table.\r | |
226 | @param[in] PPVer Version string of Physical Presence interface supported by platform.\r | |
227 | \r | |
228 | @return The allocated address for the found region.\r | |
229 | \r | |
230 | **/\r | |
231 | EFI_STATUS\r | |
232 | UpdatePPVersion (\r | |
233 | EFI_ACPI_DESCRIPTION_HEADER *Table,\r | |
234 | CHAR8 *PPVer\r | |
235 | )\r | |
236 | {\r | |
237 | EFI_STATUS Status;\r | |
238 | UINT8 *DataPtr;\r | |
239 | \r | |
240 | //\r | |
241 | // Patch some pointers for the ASL code before loading the SSDT.\r | |
242 | //\r | |
243 | for (DataPtr = (UINT8 *)(Table + 1);\r | |
244 | DataPtr <= (UINT8 *) ((UINT8 *) Table + Table->Length - PHYSICAL_PRESENCE_VERSION_SIZE);\r | |
245 | DataPtr += 1) {\r | |
0c687d02 ZC |
246 | if (AsciiStrCmp((CHAR8 *)DataPtr, PHYSICAL_PRESENCE_VERSION_TAG) == 0) {\r |
247 | Status = AsciiStrCpyS((CHAR8 *)DataPtr, PHYSICAL_PRESENCE_VERSION_SIZE, PPVer);\r | |
cd643013 ZC |
248 | DEBUG((EFI_D_INFO, "TPM2 Physical Presence Interface Version update status 0x%x\n", Status));\r |
249 | return Status;\r | |
250 | }\r | |
251 | }\r | |
252 | \r | |
253 | return EFI_NOT_FOUND;\r | |
254 | }\r | |
255 | \r | |
c4122dca ZC |
256 | /**\r |
257 | Patch interrupt resources returned by TPM _PRS. ResourceTemplate to patch is determined by input\r | |
258 | interrupt buffer size. BufferSize, PkgLength and interrupt descirptor in ByteList need to be patched\r | |
259 | \r | |
260 | @param[in, out] Table The TPM item in ACPI table.\r | |
261 | @param[in] IrqBuffer Input new IRQ buffer.\r | |
262 | @param[in] IrqBuffserSize Input new IRQ buffer size.\r | |
1ea08a3d | 263 | @param[out] IsShortFormPkgLength If _PRS returns Short length Package(ACPI spec 20.2.4).\r |
c4122dca ZC |
264 | \r |
265 | @return patch status.\r | |
266 | \r | |
267 | **/\r | |
268 | EFI_STATUS\r | |
269 | UpdatePossibleResource (\r | |
6c7ac681 ZC |
270 | IN OUT EFI_ACPI_DESCRIPTION_HEADER *Table,\r |
271 | IN UINT32 *IrqBuffer,\r | |
272 | IN UINT32 IrqBuffserSize,\r | |
273 | OUT BOOLEAN *IsShortFormPkgLength\r | |
c4122dca ZC |
274 | )\r |
275 | {\r | |
276 | UINT8 *DataPtr;\r | |
277 | UINT8 *DataEndPtr;\r | |
278 | UINT32 NewPkgLength;\r | |
279 | UINT32 OrignalPkgLength;\r | |
280 | \r | |
281 | NewPkgLength = 0;\r | |
282 | OrignalPkgLength = 0;\r | |
283 | DataEndPtr = NULL;\r | |
284 | \r | |
285 | //\r | |
286 | // Follow ACPI spec\r | |
287 | // 6.4.3 Extend Interrupt Descriptor.\r | |
288 | // 19.3.3 ASL Resource Template\r | |
289 | // 20 AML specification\r | |
290 | // to patch TPM ACPI object _PRS returned ResourceTemplate() containing 2 resource descriptors and an auto appended End Tag\r | |
291 | //\r | |
292 | // AML data is organized by following rule.\r | |
293 | // Code need to patch BufferSize and PkgLength and interrupt descirptor in ByteList\r | |
294 | //\r | |
295 | // ============= Buffer ====================\r | |
296 | // DefBuffer := BufferOp PkgLength BufferSize ByteList\r | |
297 | // BufferOp := 0x11\r | |
298 | //\r | |
299 | // ==============PkgLength==================\r | |
300 | // PkgLength := PkgLeadByte |\r | |
301 | // <PkgLeadByte ByteData> |\r | |
302 | // <PkgLeadByte ByteData ByteData> |\r | |
303 | // <PkgLeadByte ByteData ByteData ByteData>\r | |
304 | //\r | |
305 | // PkgLeadByte := <bit 7-6: ByteData count that follows (0-3)>\r | |
306 | // <bit 5-4: Only used if PkgLength <= 63 >\r | |
307 | // <bit 3-0: Least significant package length nybble>\r | |
308 | //\r | |
309 | //==============BufferSize==================\r | |
310 | // BufferSize := Integar\r | |
311 | // Integar := ByteConst|WordConst|DwordConst....\r | |
312 | //\r | |
313 | // ByteConst := BytePrefix ByteData\r | |
314 | //\r | |
315 | //==============ByteList===================\r | |
316 | // ByteList := ByteData ByteList\r | |
317 | //\r | |
318 | //=========================================\r | |
319 | \r | |
320 | //\r | |
321 | // 1. Check TPM_PRS_RESS with PkgLength <=63 can hold the input interrupt number buffer for patching\r | |
322 | //\r | |
323 | for (DataPtr = (UINT8 *)(Table + 1);\r | |
324 | DataPtr < (UINT8 *) ((UINT8 *) Table + Table->Length - (TPM_PRS_RES_NAME_SIZE + TPM_POS_RES_TEMPLATE_MIN_SIZE));\r | |
325 | DataPtr += 1) {\r | |
326 | if (CompareMem(DataPtr, TPM_PRS_RESS, TPM_PRS_RES_NAME_SIZE) == 0) {\r | |
327 | //\r | |
328 | // Jump over object name & BufferOp\r | |
329 | //\r | |
330 | DataPtr += TPM_PRS_RES_NAME_SIZE + 1;\r | |
331 | \r | |
332 | if ((*DataPtr & (BIT7|BIT6)) == 0) {\r | |
333 | OrignalPkgLength = (UINT32)*DataPtr;\r | |
334 | DataEndPtr = DataPtr + OrignalPkgLength;\r | |
335 | \r | |
336 | //\r | |
337 | // Jump over PkgLength = PkgLeadByte only\r | |
338 | //\r | |
339 | NewPkgLength++;\r | |
340 | \r | |
341 | //\r | |
342 | // Jump over BufferSize\r | |
343 | //\r | |
344 | if (*(DataPtr + 1) == AML_BYTE_PREFIX) {\r | |
345 | NewPkgLength += 2;\r | |
346 | } else if (*(DataPtr + 1) == AML_WORD_PREFIX) {\r | |
347 | NewPkgLength += 3;\r | |
348 | } else if (*(DataPtr + 1) == AML_DWORD_PREFIX) {\r | |
349 | NewPkgLength += 5;\r | |
350 | } else {\r | |
351 | ASSERT(FALSE);\r | |
352 | return EFI_UNSUPPORTED;\r | |
353 | }\r | |
354 | } else {\r | |
355 | ASSERT(FALSE);\r | |
356 | return EFI_UNSUPPORTED;\r | |
357 | }\r | |
358 | \r | |
359 | //\r | |
360 | // Include Memory32Fixed Descritor (12 Bytes) + Interrupt Descriptor header(5 Bytes) + End Tag(2 Bytes)\r | |
361 | //\r | |
362 | NewPkgLength += 19 + IrqBuffserSize;\r | |
363 | if (NewPkgLength > 63) {\r | |
364 | break;\r | |
365 | }\r | |
366 | \r | |
367 | if (NewPkgLength > OrignalPkgLength) {\r | |
368 | ASSERT(FALSE);\r | |
369 | return EFI_INVALID_PARAMETER;\r | |
370 | }\r | |
371 | \r | |
372 | //\r | |
373 | // 1.1 Patch PkgLength\r | |
374 | //\r | |
375 | *DataPtr = (UINT8)NewPkgLength;\r | |
376 | \r | |
377 | //\r | |
378 | // 1.2 Patch BufferSize = sizeof(Memory32Fixed Descritor + Interrupt Descriptor + End Tag).\r | |
379 | // It is Little endian. So only patch lowest byte of BufferSize due to current interrupt number limit.\r | |
380 | //\r | |
381 | *(DataPtr + 2) = (UINT8)(IrqBuffserSize + 19);\r | |
382 | \r | |
383 | //\r | |
384 | // Notify _PRS to report short formed ResourceTemplate\r | |
385 | //\r | |
1ea08a3d | 386 | *IsShortFormPkgLength = TRUE;\r |
c4122dca ZC |
387 | \r |
388 | break;\r | |
389 | }\r | |
390 | }\r | |
391 | \r | |
392 | //\r | |
393 | // 2. Use TPM_PRS_RESL with PkgLength > 63 to hold longer input interrupt number buffer for patching\r | |
394 | //\r | |
395 | if (NewPkgLength > 63) {\r | |
396 | NewPkgLength = 0;\r | |
397 | OrignalPkgLength = 0;\r | |
398 | for (DataPtr = (UINT8 *)(Table + 1);\r | |
399 | DataPtr < (UINT8 *) ((UINT8 *) Table + Table->Length - (TPM_PRS_RES_NAME_SIZE + TPM_POS_RES_TEMPLATE_MIN_SIZE));\r | |
400 | DataPtr += 1) {\r | |
401 | if (CompareMem(DataPtr, TPM_PRS_RESL, TPM_PRS_RES_NAME_SIZE) == 0) {\r | |
402 | //\r | |
403 | // Jump over object name & BufferOp\r | |
404 | //\r | |
405 | DataPtr += TPM_PRS_RES_NAME_SIZE + 1;\r | |
406 | \r | |
407 | if ((*DataPtr & (BIT7|BIT6)) != 0) {\r | |
408 | OrignalPkgLength = (UINT32)(*(DataPtr + 1) << 4) + (*DataPtr & 0x0F);\r | |
409 | DataEndPtr = DataPtr + OrignalPkgLength;\r | |
410 | //\r | |
411 | // Jump over PkgLength = PkgLeadByte + ByteData length\r | |
412 | //\r | |
413 | NewPkgLength += 1 + ((*DataPtr & (BIT7|BIT6)) >> 6);\r | |
414 | \r | |
415 | //\r | |
416 | // Jump over BufferSize\r | |
417 | //\r | |
418 | if (*(DataPtr + NewPkgLength) == AML_BYTE_PREFIX) {\r | |
419 | NewPkgLength += 2;\r | |
420 | } else if (*(DataPtr + NewPkgLength) == AML_WORD_PREFIX) {\r | |
421 | NewPkgLength += 3;\r | |
422 | } else if (*(DataPtr + NewPkgLength) == AML_DWORD_PREFIX) {\r | |
423 | NewPkgLength += 5;\r | |
424 | } else {\r | |
425 | ASSERT(FALSE);\r | |
426 | return EFI_UNSUPPORTED;\r | |
427 | }\r | |
428 | } else {\r | |
429 | ASSERT(FALSE);\r | |
430 | return EFI_UNSUPPORTED;\r | |
431 | }\r | |
432 | \r | |
433 | //\r | |
434 | // Include Memory32Fixed Descritor (12 Bytes) + Interrupt Descriptor header(5 Bytes) + End Tag(2 Bytes)\r | |
435 | //\r | |
436 | NewPkgLength += 19 + IrqBuffserSize;\r | |
437 | \r | |
438 | if (NewPkgLength > OrignalPkgLength) {\r | |
439 | ASSERT(FALSE);\r | |
440 | return EFI_INVALID_PARAMETER;\r | |
441 | }\r | |
442 | \r | |
443 | //\r | |
444 | // 2.1 Patch PkgLength. Only patch PkgLeadByte and first ByteData\r | |
445 | //\r | |
446 | *DataPtr = (UINT8)((*DataPtr) & 0xF0) | (NewPkgLength & 0x0F);\r | |
447 | *(DataPtr + 1) = (UINT8)((NewPkgLength & 0xFF0) >> 4);\r | |
448 | \r | |
449 | //\r | |
450 | // 2.2 Patch BufferSize = sizeof(Memory32Fixed Descritor + Interrupt Descriptor + End Tag).\r | |
451 | // It is Little endian. Only patch lowest byte of BufferSize due to current interrupt number limit.\r | |
452 | //\r | |
453 | *(DataPtr + 2 + ((*DataPtr & (BIT7|BIT6)) >> 6)) = (UINT8)(IrqBuffserSize + 19);\r | |
454 | \r | |
455 | //\r | |
456 | // Notify _PRS to report long formed ResourceTemplate\r | |
457 | //\r | |
1ea08a3d | 458 | *IsShortFormPkgLength = FALSE;\r |
c4122dca ZC |
459 | break;\r |
460 | }\r | |
461 | }\r | |
462 | }\r | |
463 | \r | |
464 | if (DataPtr >= (UINT8 *) ((UINT8 *) Table + Table->Length - (TPM_PRS_RES_NAME_SIZE + TPM_POS_RES_TEMPLATE_MIN_SIZE))) {\r | |
465 | return EFI_NOT_FOUND;\r | |
466 | }\r | |
467 | \r | |
468 | //\r | |
469 | // 3. Move DataPtr to Interrupt descriptor header and patch interrupt descriptor.\r | |
470 | // 5 bytes for interrupt descriptor header, 2 bytes for End Tag\r | |
471 | //\r | |
472 | DataPtr += NewPkgLength - (5 + IrqBuffserSize + 2);\r | |
473 | //\r | |
474 | // 3.1 Patch Length bit[7:0] of Interrupt descirptor patch interrupt descriptor\r | |
475 | //\r | |
476 | *(DataPtr + 1) = (UINT8)(2 + IrqBuffserSize);\r | |
477 | //\r | |
478 | // 3.2 Patch Interrupt Table Length\r | |
479 | //\r | |
480 | *(DataPtr + 4) = (UINT8)(IrqBuffserSize / sizeof(UINT32));\r | |
481 | //\r | |
482 | // 3.3 Copy patched InterruptNumBuffer\r | |
483 | //\r | |
484 | CopyMem(DataPtr + 5, IrqBuffer, IrqBuffserSize);\r | |
485 | \r | |
486 | //\r | |
487 | // 4. Jump over Interrupt descirptor and Patch END Tag, set Checksum field to 0\r | |
488 | //\r | |
489 | DataPtr += 5 + IrqBuffserSize;\r | |
490 | *DataPtr = ACPI_END_TAG_DESCRIPTOR;\r | |
491 | *(DataPtr + 1) = 0;\r | |
492 | \r | |
493 | //\r | |
449083a3 | 494 | // 5. Jump over new ResourceTemplate. Stuff rest bytes to NOOP\r |
c4122dca | 495 | //\r |
449083a3 ZC |
496 | DataPtr += 2;\r |
497 | if (DataPtr < DataEndPtr) {\r | |
28fd7b09 | 498 | SetMem(DataPtr, (UINTN)DataEndPtr - (UINTN)DataPtr, AML_NOOP_OP);\r |
c4122dca ZC |
499 | }\r |
500 | \r | |
501 | return EFI_SUCCESS;\r | |
502 | }\r | |
503 | \r | |
73126ac2 ZC |
504 | /**\r |
505 | Patch TPM2 device HID string. The initial string tag in TPM2 ACPI table is "NNN0000".\r | |
506 | \r | |
507 | @param[in, out] Table The TPM2 SSDT ACPI table.\r | |
508 | \r | |
509 | @return HID Update status.\r | |
510 | \r | |
511 | **/\r | |
512 | EFI_STATUS\r | |
513 | UpdateHID (\r | |
514 | EFI_ACPI_DESCRIPTION_HEADER *Table\r | |
515 | )\r | |
516 | {\r | |
517 | EFI_STATUS Status;\r | |
518 | UINT8 *DataPtr;\r | |
3304abc1 | 519 | CHAR8 Hid[TPM_HID_ACPI_SIZE];\r |
73126ac2 ZC |
520 | UINT32 ManufacturerID;\r |
521 | UINT32 FirmwareVersion1;\r | |
522 | UINT32 FirmwareVersion2;\r | |
523 | BOOLEAN PnpHID;\r | |
524 | \r | |
525 | PnpHID = TRUE;\r | |
526 | \r | |
527 | //\r | |
528 | // Initialize HID with Default PNP string\r | |
529 | //\r | |
3304abc1 | 530 | ZeroMem(Hid, TPM_HID_ACPI_SIZE);\r |
73126ac2 ZC |
531 | \r |
532 | //\r | |
533 | // Get Manufacturer ID\r | |
534 | //\r | |
535 | Status = Tpm2GetCapabilityManufactureID(&ManufacturerID);\r | |
536 | if (!EFI_ERROR(Status)) {\r | |
537 | DEBUG((EFI_D_INFO, "TPM_PT_MANUFACTURER 0x%08x\n", ManufacturerID));\r | |
538 | //\r | |
b3548d32 | 539 | // ManufacturerID defined in TCG Vendor ID Registry\r |
73126ac2 ZC |
540 | // may tailed with 0x00 or 0x20\r |
541 | //\r | |
542 | if ((ManufacturerID >> 24) == 0x00 || ((ManufacturerID >> 24) == 0x20)) {\r | |
543 | //\r | |
544 | // HID containing PNP ID "NNN####"\r | |
545 | // NNN is uppercase letter for Vendor ID specified by manufacturer\r | |
546 | //\r | |
3304abc1 | 547 | CopyMem(Hid, &ManufacturerID, 3);\r |
73126ac2 ZC |
548 | } else {\r |
549 | //\r | |
550 | // HID containing ACP ID "NNNN####"\r | |
551 | // NNNN is uppercase letter for Vendor ID specified by manufacturer\r | |
552 | //\r | |
3304abc1 | 553 | CopyMem(Hid, &ManufacturerID, 4);\r |
73126ac2 ZC |
554 | PnpHID = FALSE;\r |
555 | }\r | |
556 | } else {\r | |
557 | DEBUG ((EFI_D_ERROR, "Get TPM_PT_MANUFACTURER failed %x!\n", Status));\r | |
558 | ASSERT(FALSE);\r | |
559 | return Status;\r | |
560 | }\r | |
561 | \r | |
562 | Status = Tpm2GetCapabilityFirmwareVersion(&FirmwareVersion1, &FirmwareVersion2);\r | |
563 | if (!EFI_ERROR(Status)) {\r | |
564 | DEBUG((EFI_D_INFO, "TPM_PT_FIRMWARE_VERSION_1 0x%x\n", FirmwareVersion1));\r | |
565 | DEBUG((EFI_D_INFO, "TPM_PT_FIRMWARE_VERSION_2 0x%x\n", FirmwareVersion2));\r | |
566 | //\r | |
567 | // #### is Firmware Version 1\r | |
568 | //\r | |
569 | if (PnpHID) {\r | |
363dc422 | 570 | AsciiSPrint(Hid + 3, TPM_HID_PNP_SIZE - 3, "%02d%02d", ((FirmwareVersion1 & 0xFFFF0000) >> 16), (FirmwareVersion1 & 0x0000FFFF));\r |
73126ac2 | 571 | } else {\r |
363dc422 | 572 | AsciiSPrint(Hid + 4, TPM_HID_ACPI_SIZE - 4, "%02d%02d", ((FirmwareVersion1 & 0xFFFF0000) >> 16), (FirmwareVersion1 & 0x0000FFFF));\r |
73126ac2 | 573 | }\r |
b3548d32 | 574 | \r |
73126ac2 ZC |
575 | } else {\r |
576 | DEBUG ((EFI_D_ERROR, "Get TPM_PT_FIRMWARE_VERSION_X failed %x!\n", Status));\r | |
577 | ASSERT(FALSE);\r | |
578 | return Status;\r | |
579 | }\r | |
580 | \r | |
581 | //\r | |
582 | // Patch HID in ASL code before loading the SSDT.\r | |
583 | //\r | |
584 | for (DataPtr = (UINT8 *)(Table + 1);\r | |
585 | DataPtr <= (UINT8 *) ((UINT8 *) Table + Table->Length - TPM_HID_PNP_SIZE);\r | |
586 | DataPtr += 1) {\r | |
587 | if (AsciiStrCmp((CHAR8 *)DataPtr, TPM_HID_TAG) == 0) {\r | |
588 | if (PnpHID) {\r | |
3304abc1 | 589 | CopyMem(DataPtr, Hid, TPM_HID_PNP_SIZE);\r |
73126ac2 | 590 | //\r |
9a9fa14e | 591 | // if HID is PNP ID, patch the last byte in HID TAG to Noop\r |
73126ac2 | 592 | //\r |
9a9fa14e ZC |
593 | *(DataPtr + TPM_HID_PNP_SIZE) = AML_NOOP_OP;\r |
594 | } else {\r | |
595 | \r | |
3304abc1 | 596 | CopyMem(DataPtr, Hid, TPM_HID_ACPI_SIZE);\r |
73126ac2 | 597 | }\r |
a6e0e994 ZC |
598 | DEBUG((DEBUG_INFO, "TPM2 ACPI _HID is patched to %a\n", DataPtr));\r |
599 | \r | |
73126ac2 ZC |
600 | return Status;\r |
601 | }\r | |
602 | }\r | |
603 | \r | |
604 | DEBUG((EFI_D_ERROR, "TPM2 ACPI HID TAG for patch not found!\n"));\r | |
605 | return EFI_NOT_FOUND;\r | |
606 | }\r | |
607 | \r | |
1abfa4ce JY |
608 | /**\r |
609 | Initialize and publish TPM items in ACPI table.\r | |
610 | \r | |
611 | @retval EFI_SUCCESS The TCG ACPI table is published successfully.\r | |
612 | @retval Others The TCG ACPI table is not published.\r | |
613 | \r | |
614 | **/\r | |
615 | EFI_STATUS\r | |
616 | PublishAcpiTable (\r | |
617 | VOID\r | |
618 | )\r | |
619 | {\r | |
620 | EFI_STATUS Status;\r | |
621 | EFI_ACPI_TABLE_PROTOCOL *AcpiTable;\r | |
622 | UINTN TableKey;\r | |
623 | EFI_ACPI_DESCRIPTION_HEADER *Table;\r | |
624 | UINTN TableSize;\r | |
c4122dca ZC |
625 | UINT32 *PossibleIrqNumBuf;\r |
626 | UINT32 PossibleIrqNumBufSize;\r | |
1ea08a3d ZC |
627 | BOOLEAN IsShortFormPkgLength;\r |
628 | \r | |
629 | IsShortFormPkgLength = FALSE;\r | |
1abfa4ce JY |
630 | \r |
631 | Status = GetSectionFromFv (\r | |
632 | &gEfiCallerIdGuid,\r | |
633 | EFI_SECTION_RAW,\r | |
634 | 0,\r | |
635 | (VOID **) &Table,\r | |
636 | &TableSize\r | |
637 | );\r | |
638 | ASSERT_EFI_ERROR (Status);\r | |
639 | \r | |
cd643013 ZC |
640 | //\r |
641 | // Update Table version before measuring it to PCR\r | |
642 | //\r | |
643 | Status = UpdatePPVersion(Table, (CHAR8 *)PcdGetPtr(PcdTcgPhysicalPresenceInterfaceVer));\r | |
644 | ASSERT_EFI_ERROR (Status);\r | |
1abfa4ce | 645 | \r |
dd6d0a52 SZ |
646 | DEBUG ((\r |
647 | DEBUG_INFO,\r | |
648 | "Current physical presence interface version - %a\n",\r | |
649 | (CHAR8 *) PcdGetPtr(PcdTcgPhysicalPresenceInterfaceVer)\r | |
650 | ));\r | |
651 | \r | |
73126ac2 ZC |
652 | //\r |
653 | // Update TPM2 HID before measuring it to PCR\r | |
654 | //\r | |
655 | Status = UpdateHID(Table);\r | |
656 | if (EFI_ERROR(Status)) {\r | |
657 | return Status;\r | |
658 | }\r | |
659 | \r | |
c4122dca ZC |
660 | if (PcdGet32(PcdTpm2CurrentIrqNum) != 0) {\r |
661 | //\r | |
662 | // Patch _PRS interrupt resource only when TPM interrupt is supported\r | |
663 | //\r | |
664 | PossibleIrqNumBuf = (UINT32 *)PcdGetPtr(PcdTpm2PossibleIrqNumBuf);\r | |
665 | PossibleIrqNumBufSize = (UINT32)PcdGetSize(PcdTpm2PossibleIrqNumBuf);\r | |
666 | \r | |
667 | if (PossibleIrqNumBufSize <= MAX_PRS_INT_BUF_SIZE && (PossibleIrqNumBufSize % sizeof(UINT32)) == 0) {\r | |
1ea08a3d | 668 | Status = UpdatePossibleResource(Table, PossibleIrqNumBuf, PossibleIrqNumBufSize, &IsShortFormPkgLength);\r |
c4122dca ZC |
669 | DEBUG ((\r |
670 | DEBUG_INFO,\r | |
671 | "UpdatePossibleResource status - %x. TPM2 service may not ready in OS.\n",\r | |
672 | Status\r | |
673 | ));\r | |
674 | } else {\r | |
675 | DEBUG ((\r | |
676 | DEBUG_INFO,\r | |
677 | "PcdTpm2PossibleIrqNumBuf size %x is not correct. TPM2 service may not ready in OS.\n",\r | |
678 | PossibleIrqNumBufSize\r | |
679 | ));\r | |
680 | }\r | |
681 | }\r | |
682 | \r | |
1abfa4ce JY |
683 | //\r |
684 | // Measure to PCR[0] with event EV_POST_CODE ACPI DATA\r | |
685 | //\r | |
686 | TpmMeasureAndLogData(\r | |
687 | 0,\r | |
688 | EV_POST_CODE,\r | |
689 | EV_POSTCODE_INFO_ACPI_DATA,\r | |
690 | ACPI_DATA_LEN,\r | |
691 | Table,\r | |
692 | TableSize\r | |
693 | );\r | |
694 | \r | |
695 | \r | |
696 | ASSERT (Table->OemTableId == SIGNATURE_64 ('T', 'p', 'm', '2', 'T', 'a', 'b', 'l'));\r | |
697 | CopyMem (Table->OemId, PcdGetPtr (PcdAcpiDefaultOemId), sizeof (Table->OemId) );\r | |
698 | mTcgNvs = AssignOpRegion (Table, SIGNATURE_32 ('T', 'N', 'V', 'S'), (UINT16) sizeof (TCG_NVS));\r | |
699 | ASSERT (mTcgNvs != NULL);\r | |
c4122dca | 700 | mTcgNvs->TpmIrqNum = PcdGet32(PcdTpm2CurrentIrqNum);\r |
1ea08a3d | 701 | mTcgNvs->IsShortFormPkgLength = IsShortFormPkgLength;\r |
1abfa4ce JY |
702 | \r |
703 | //\r | |
cd643013 | 704 | // Publish the TPM ACPI table. Table is re-checksumed.\r |
1abfa4ce JY |
705 | //\r |
706 | Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID **) &AcpiTable);\r | |
707 | ASSERT_EFI_ERROR (Status);\r | |
708 | \r | |
709 | TableKey = 0;\r | |
710 | Status = AcpiTable->InstallAcpiTable (\r | |
711 | AcpiTable,\r | |
712 | Table,\r | |
713 | TableSize,\r | |
714 | &TableKey\r | |
715 | );\r | |
716 | ASSERT_EFI_ERROR (Status);\r | |
717 | \r | |
718 | return Status;\r | |
719 | }\r | |
720 | \r | |
721 | /**\r | |
722 | Publish TPM2 ACPI table\r | |
723 | \r | |
724 | @retval EFI_SUCCESS The TPM2 ACPI table is published successfully.\r | |
725 | @retval Others The TPM2 ACPI table is not published.\r | |
726 | \r | |
727 | **/\r | |
728 | EFI_STATUS\r | |
729 | PublishTpm2 (\r | |
730 | VOID\r | |
731 | )\r | |
732 | {\r | |
733 | EFI_STATUS Status;\r | |
734 | EFI_ACPI_TABLE_PROTOCOL *AcpiTable;\r | |
735 | UINTN TableKey;\r | |
736 | UINT64 OemTableId;\r | |
d967d6d9 | 737 | EFI_TPM2_ACPI_CONTROL_AREA *ControlArea;\r |
f15cb995 | 738 | TPM2_PTP_INTERFACE_TYPE InterfaceType;\r |
1abfa4ce | 739 | \r |
fca42289 ZC |
740 | mTpm2AcpiTemplate.Header.Revision = PcdGet8(PcdTpm2AcpiTableRev);\r |
741 | DEBUG((DEBUG_INFO, "Tpm2 ACPI table revision is %d\n", mTpm2AcpiTemplate.Header.Revision));\r | |
742 | \r | |
bf3b7aae ZC |
743 | //\r |
744 | // PlatformClass is only valid for version 4 and above\r | |
b3548d32 | 745 | // BIT0~15: PlatformClass\r |
bf3b7aae ZC |
746 | // BIT16~31: Reserved\r |
747 | //\r | |
748 | if (mTpm2AcpiTemplate.Header.Revision >= EFI_TPM2_ACPI_TABLE_REVISION_4) {\r | |
749 | mTpm2AcpiTemplate.Flags = (mTpm2AcpiTemplate.Flags & 0xFFFF0000) | PcdGet8(PcdTpmPlatformClass);\r | |
750 | DEBUG((DEBUG_INFO, "Tpm2 ACPI table PlatformClass is %d\n", (mTpm2AcpiTemplate.Flags & 0x0000FFFF)));\r | |
751 | }\r | |
752 | \r | |
1abfa4ce JY |
753 | //\r |
754 | // Measure to PCR[0] with event EV_POST_CODE ACPI DATA\r | |
755 | //\r | |
756 | TpmMeasureAndLogData(\r | |
757 | 0,\r | |
758 | EV_POST_CODE,\r | |
759 | EV_POSTCODE_INFO_ACPI_DATA,\r | |
760 | ACPI_DATA_LEN,\r | |
761 | &mTpm2AcpiTemplate,\r | |
762 | sizeof(mTpm2AcpiTemplate)\r | |
763 | );\r | |
764 | \r | |
f15cb995 | 765 | InterfaceType = PcdGet8(PcdActiveTpmInterfaceType);\r |
d967d6d9 | 766 | switch (InterfaceType) {\r |
f15cb995 | 767 | case Tpm2PtpInterfaceCrb:\r |
d967d6d9 JY |
768 | mTpm2AcpiTemplate.StartMethod = EFI_TPM2_ACPI_TABLE_START_METHOD_COMMAND_RESPONSE_BUFFER_INTERFACE;\r |
769 | mTpm2AcpiTemplate.AddressOfControlArea = PcdGet64 (PcdTpmBaseAddress) + 0x40;\r | |
770 | ControlArea = (EFI_TPM2_ACPI_CONTROL_AREA *)(UINTN)mTpm2AcpiTemplate.AddressOfControlArea;\r | |
771 | ControlArea->CommandSize = 0xF80;\r | |
772 | ControlArea->ResponseSize = 0xF80;\r | |
773 | ControlArea->Command = PcdGet64 (PcdTpmBaseAddress) + 0x80;\r | |
774 | ControlArea->Response = PcdGet64 (PcdTpmBaseAddress) + 0x80;\r | |
775 | break;\r | |
f15cb995 ZC |
776 | case Tpm2PtpInterfaceFifo:\r |
777 | case Tpm2PtpInterfaceTis:\r | |
d967d6d9 JY |
778 | break;\r |
779 | default:\r | |
3b5624b0 | 780 | DEBUG((EFI_D_ERROR, "TPM2 InterfaceType get error! %d\n", InterfaceType));\r |
d967d6d9 JY |
781 | break;\r |
782 | }\r | |
783 | \r | |
1abfa4ce JY |
784 | CopyMem (mTpm2AcpiTemplate.Header.OemId, PcdGetPtr (PcdAcpiDefaultOemId), sizeof (mTpm2AcpiTemplate.Header.OemId));\r |
785 | OemTableId = PcdGet64 (PcdAcpiDefaultOemTableId);\r | |
786 | CopyMem (&mTpm2AcpiTemplate.Header.OemTableId, &OemTableId, sizeof (UINT64));\r | |
787 | mTpm2AcpiTemplate.Header.OemRevision = PcdGet32 (PcdAcpiDefaultOemRevision);\r | |
788 | mTpm2AcpiTemplate.Header.CreatorId = PcdGet32 (PcdAcpiDefaultCreatorId);\r | |
789 | mTpm2AcpiTemplate.Header.CreatorRevision = PcdGet32 (PcdAcpiDefaultCreatorRevision);\r | |
790 | \r | |
791 | //\r | |
792 | // Construct ACPI table\r | |
793 | //\r | |
794 | Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID **) &AcpiTable);\r | |
795 | ASSERT_EFI_ERROR (Status);\r | |
796 | \r | |
797 | Status = AcpiTable->InstallAcpiTable (\r | |
798 | AcpiTable,\r | |
799 | &mTpm2AcpiTemplate,\r | |
800 | sizeof(mTpm2AcpiTemplate),\r | |
801 | &TableKey\r | |
802 | );\r | |
803 | ASSERT_EFI_ERROR (Status);\r | |
804 | \r | |
805 | return Status;\r | |
806 | }\r | |
807 | \r | |
808 | /**\r | |
809 | The driver's entry point.\r | |
810 | \r | |
b3548d32 | 811 | It install callbacks for TPM physical presence and MemoryClear, and locate\r |
1abfa4ce JY |
812 | SMM variable to be used in the callback function.\r |
813 | \r | |
b3548d32 | 814 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r |
1abfa4ce | 815 | @param[in] SystemTable A pointer to the EFI System Table.\r |
b3548d32 | 816 | \r |
1abfa4ce JY |
817 | @retval EFI_SUCCESS The entry point is executed successfully.\r |
818 | @retval Others Some error occurs when executing this entry point.\r | |
819 | \r | |
820 | **/\r | |
821 | EFI_STATUS\r | |
822 | EFIAPI\r | |
823 | InitializeTcgSmm (\r | |
824 | IN EFI_HANDLE ImageHandle,\r | |
825 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
826 | )\r | |
827 | {\r | |
828 | EFI_STATUS Status;\r | |
829 | EFI_SMM_SW_DISPATCH2_PROTOCOL *SwDispatch;\r | |
830 | EFI_SMM_SW_REGISTER_CONTEXT SwContext;\r | |
831 | EFI_HANDLE SwHandle;\r | |
832 | \r | |
833 | if (!CompareGuid (PcdGetPtr(PcdTpmInstanceGuid), &gEfiTpmDeviceInstanceTpm20DtpmGuid)){\r | |
834 | DEBUG ((EFI_D_ERROR, "No TPM2 DTPM instance required!\n"));\r | |
835 | return EFI_UNSUPPORTED;\r | |
836 | }\r | |
837 | \r | |
838 | Status = PublishAcpiTable ();\r | |
839 | ASSERT_EFI_ERROR (Status);\r | |
840 | \r | |
841 | //\r | |
842 | // Get the Sw dispatch protocol and register SMI callback functions.\r | |
843 | //\r | |
844 | Status = gSmst->SmmLocateProtocol (&gEfiSmmSwDispatch2ProtocolGuid, NULL, (VOID**)&SwDispatch);\r | |
845 | ASSERT_EFI_ERROR (Status);\r | |
846 | SwContext.SwSmiInputValue = (UINTN) -1;\r | |
847 | Status = SwDispatch->Register (SwDispatch, PhysicalPresenceCallback, &SwContext, &SwHandle);\r | |
848 | ASSERT_EFI_ERROR (Status);\r | |
849 | if (EFI_ERROR (Status)) {\r | |
850 | return Status;\r | |
851 | }\r | |
852 | mTcgNvs->PhysicalPresence.SoftwareSmi = (UINT8) SwContext.SwSmiInputValue;\r | |
853 | \r | |
854 | SwContext.SwSmiInputValue = (UINTN) -1;\r | |
855 | Status = SwDispatch->Register (SwDispatch, MemoryClearCallback, &SwContext, &SwHandle);\r | |
856 | ASSERT_EFI_ERROR (Status);\r | |
857 | if (EFI_ERROR (Status)) {\r | |
858 | return Status;\r | |
859 | }\r | |
860 | mTcgNvs->MemoryClear.SoftwareSmi = (UINT8) SwContext.SwSmiInputValue;\r | |
b3548d32 | 861 | \r |
1abfa4ce JY |
862 | //\r |
863 | // Locate SmmVariableProtocol.\r | |
864 | //\r | |
865 | Status = gSmst->SmmLocateProtocol (&gEfiSmmVariableProtocolGuid, NULL, (VOID**)&mSmmVariable);\r | |
866 | ASSERT_EFI_ERROR (Status);\r | |
867 | \r | |
868 | //\r | |
869 | // Set TPM2 ACPI table\r | |
870 | //\r | |
871 | Status = PublishTpm2 ();\r | |
872 | ASSERT_EFI_ERROR (Status);\r | |
873 | \r | |
874 | \r | |
875 | return EFI_SUCCESS;\r | |
876 | }\r | |
877 | \r |