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Commit | Line | Data |
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529a5a86 MK |
1 | /** @file\r |
2 | Enable SMM profile.\r | |
3 | \r | |
3eb69b08 | 4 | Copyright (c) 2012 - 2019, Intel Corporation. All rights reserved.<BR>\r |
bdafda8c | 5 | Copyright (c) 2017 - 2020, AMD Incorporated. All rights reserved.<BR>\r |
241f9149 | 6 | \r |
0acd8697 | 7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
529a5a86 MK |
8 | \r |
9 | **/\r | |
10 | \r | |
11 | #include "PiSmmCpuDxeSmm.h"\r | |
12 | #include "SmmProfileInternal.h"\r | |
13 | \r | |
053e878b | 14 | UINT32 mSmmProfileCr3;\r |
529a5a86 | 15 | \r |
053e878b MK |
16 | SMM_PROFILE_HEADER *mSmmProfileBase;\r |
17 | MSR_DS_AREA_STRUCT *mMsrDsAreaBase;\r | |
529a5a86 MK |
18 | //\r |
19 | // The buffer to store SMM profile data.\r | |
20 | //\r | |
053e878b | 21 | UINTN mSmmProfileSize;\r |
529a5a86 MK |
22 | \r |
23 | //\r | |
24 | // The buffer to enable branch trace store.\r | |
25 | //\r | |
053e878b | 26 | UINTN mMsrDsAreaSize = SMM_PROFILE_DTS_SIZE;\r |
529a5a86 | 27 | \r |
3c5ce64f LE |
28 | //\r |
29 | // The flag indicates if execute-disable is supported by processor.\r | |
30 | //\r | |
053e878b | 31 | BOOLEAN mXdSupported = TRUE;\r |
3c5ce64f | 32 | \r |
529a5a86 MK |
33 | //\r |
34 | // The flag indicates if execute-disable is enabled on processor.\r | |
35 | //\r | |
053e878b | 36 | BOOLEAN mXdEnabled = FALSE;\r |
529a5a86 MK |
37 | \r |
38 | //\r | |
39 | // The flag indicates if BTS is supported by processor.\r | |
40 | //\r | |
053e878b | 41 | BOOLEAN mBtsSupported = TRUE;\r |
529a5a86 MK |
42 | \r |
43 | //\r | |
44 | // The flag indicates if SMM profile starts to record data.\r | |
45 | //\r | |
053e878b | 46 | BOOLEAN mSmmProfileStart = FALSE;\r |
529a5a86 | 47 | \r |
09afd9a4 JW |
48 | //\r |
49 | // The flag indicates if #DB will be setup in #PF handler.\r | |
50 | //\r | |
053e878b | 51 | BOOLEAN mSetupDebugTrap = FALSE;\r |
09afd9a4 | 52 | \r |
529a5a86 MK |
53 | //\r |
54 | // Record the page fault exception count for one instruction execution.\r | |
55 | //\r | |
053e878b | 56 | UINTN *mPFEntryCount;\r |
529a5a86 | 57 | \r |
053e878b | 58 | UINT64 (*mLastPFEntryValue)[MAX_PF_ENTRY_COUNT];\r |
529a5a86 MK |
59 | UINT64 *(*mLastPFEntryPointer)[MAX_PF_ENTRY_COUNT];\r |
60 | \r | |
053e878b MK |
61 | MSR_DS_AREA_STRUCT **mMsrDsArea;\r |
62 | BRANCH_TRACE_RECORD **mMsrBTSRecord;\r | |
63 | UINTN mBTSRecordNumber;\r | |
64 | PEBS_RECORD **mMsrPEBSRecord;\r | |
529a5a86 MK |
65 | \r |
66 | //\r | |
67 | // These memory ranges are always present, they does not generate the access type of page fault exception,\r | |
68 | // but they possibly generate instruction fetch type of page fault exception.\r | |
69 | //\r | |
053e878b MK |
70 | MEMORY_PROTECTION_RANGE *mProtectionMemRange = NULL;\r |
71 | UINTN mProtectionMemRangeCount = 0;\r | |
529a5a86 MK |
72 | \r |
73 | //\r | |
74 | // Some predefined memory ranges.\r | |
75 | //\r | |
053e878b | 76 | MEMORY_PROTECTION_RANGE mProtectionMemRangeTemplate[] = {\r |
529a5a86 MK |
77 | //\r |
78 | // SMRAM range (to be fixed in runtime).\r | |
79 | // It is always present and instruction fetches are allowed.\r | |
80 | //\r | |
053e878b MK |
81 | {\r |
82 | { 0x00000000, 0x00000000 }, TRUE, FALSE\r | |
83 | },\r | |
529a5a86 MK |
84 | \r |
85 | //\r | |
86 | // SMM profile data range( to be fixed in runtime).\r | |
87 | // It is always present and instruction fetches are not allowed.\r | |
88 | //\r | |
053e878b MK |
89 | {\r |
90 | { 0x00000000, 0x00000000 }, TRUE, TRUE\r | |
91 | },\r | |
529a5a86 | 92 | \r |
ee584389 JF |
93 | //\r |
94 | // SMRAM ranges not covered by mCpuHotPlugData.SmrrBase/mCpuHotPlugData.SmrrSiz (to be fixed in runtime).\r | |
95 | // It is always present and instruction fetches are allowed.\r | |
96 | // {{0x00000000, 0x00000000},TRUE,FALSE},\r | |
97 | //\r | |
98 | \r | |
529a5a86 MK |
99 | //\r |
100 | // Future extended range could be added here.\r | |
101 | //\r | |
102 | \r | |
103 | //\r | |
104 | // PCI MMIO ranges (to be added in runtime).\r | |
105 | // They are always present and instruction fetches are not allowed.\r | |
106 | //\r | |
107 | };\r | |
108 | \r | |
109 | //\r | |
110 | // These memory ranges are mapped by 4KB-page instead of 2MB-page.\r | |
111 | //\r | |
053e878b MK |
112 | MEMORY_RANGE *mSplitMemRange = NULL;\r |
113 | UINTN mSplitMemRangeCount = 0;\r | |
529a5a86 MK |
114 | \r |
115 | //\r | |
116 | // SMI command port.\r | |
117 | //\r | |
053e878b | 118 | UINT32 mSmiCommandPort;\r |
529a5a86 MK |
119 | \r |
120 | /**\r | |
121 | Disable branch trace store.\r | |
122 | \r | |
123 | **/\r | |
124 | VOID\r | |
125 | DisableBTS (\r | |
126 | VOID\r | |
127 | )\r | |
128 | {\r | |
129 | AsmMsrAnd64 (MSR_DEBUG_CTL, ~((UINT64)(MSR_DEBUG_CTL_BTS | MSR_DEBUG_CTL_TR)));\r | |
130 | }\r | |
131 | \r | |
132 | /**\r | |
133 | Enable branch trace store.\r | |
134 | \r | |
135 | **/\r | |
136 | VOID\r | |
137 | EnableBTS (\r | |
138 | VOID\r | |
139 | )\r | |
140 | {\r | |
141 | AsmMsrOr64 (MSR_DEBUG_CTL, (MSR_DEBUG_CTL_BTS | MSR_DEBUG_CTL_TR));\r | |
142 | }\r | |
143 | \r | |
144 | /**\r | |
145 | Get CPU Index from APIC ID.\r | |
146 | \r | |
147 | **/\r | |
148 | UINTN\r | |
149 | GetCpuIndex (\r | |
150 | VOID\r | |
151 | )\r | |
152 | {\r | |
053e878b MK |
153 | UINTN Index;\r |
154 | UINT32 ApicId;\r | |
529a5a86 MK |
155 | \r |
156 | ApicId = GetApicId ();\r | |
157 | \r | |
bb767506 | 158 | for (Index = 0; Index < mMaxNumberOfCpus; Index++) {\r |
529a5a86 MK |
159 | if (gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId == ApicId) {\r |
160 | return Index;\r | |
161 | }\r | |
162 | }\r | |
053e878b | 163 | \r |
529a5a86 MK |
164 | ASSERT (FALSE);\r |
165 | return 0;\r | |
166 | }\r | |
167 | \r | |
168 | /**\r | |
169 | Get the source of IP after execute-disable exception is triggered.\r | |
170 | \r | |
171 | @param CpuIndex The index of CPU.\r | |
172 | @param DestinationIP The destination address.\r | |
173 | \r | |
174 | **/\r | |
175 | UINT64\r | |
176 | GetSourceFromDestinationOnBts (\r | |
053e878b MK |
177 | UINTN CpuIndex,\r |
178 | UINT64 DestinationIP\r | |
529a5a86 MK |
179 | )\r |
180 | {\r | |
181 | BRANCH_TRACE_RECORD *CurrentBTSRecord;\r | |
182 | UINTN Index;\r | |
183 | BOOLEAN FirstMatch;\r | |
184 | \r | |
185 | FirstMatch = FALSE;\r | |
186 | \r | |
187 | CurrentBTSRecord = (BRANCH_TRACE_RECORD *)mMsrDsArea[CpuIndex]->BTSIndex;\r | |
188 | for (Index = 0; Index < mBTSRecordNumber; Index++) {\r | |
189 | if ((UINTN)CurrentBTSRecord < (UINTN)mMsrBTSRecord[CpuIndex]) {\r | |
190 | //\r | |
191 | // Underflow\r | |
192 | //\r | |
193 | CurrentBTSRecord = (BRANCH_TRACE_RECORD *)((UINTN)mMsrDsArea[CpuIndex]->BTSAbsoluteMaximum - 1);\r | |
053e878b | 194 | CurrentBTSRecord--;\r |
529a5a86 | 195 | }\r |
053e878b | 196 | \r |
529a5a86 MK |
197 | if (CurrentBTSRecord->LastBranchTo == DestinationIP) {\r |
198 | //\r | |
199 | // Good! find 1st one, then find 2nd one.\r | |
200 | //\r | |
201 | if (!FirstMatch) {\r | |
202 | //\r | |
203 | // The first one is DEBUG exception\r | |
204 | //\r | |
205 | FirstMatch = TRUE;\r | |
206 | } else {\r | |
207 | //\r | |
208 | // Good find proper one.\r | |
209 | //\r | |
210 | return CurrentBTSRecord->LastBranchFrom;\r | |
211 | }\r | |
212 | }\r | |
053e878b | 213 | \r |
529a5a86 MK |
214 | CurrentBTSRecord--;\r |
215 | }\r | |
216 | \r | |
217 | return 0;\r | |
218 | }\r | |
219 | \r | |
220 | /**\r | |
221 | SMM profile specific INT 1 (single-step) exception handler.\r | |
222 | \r | |
223 | @param InterruptType Defines the type of interrupt or exception that\r | |
224 | occurred on the processor.This parameter is processor architecture specific.\r | |
225 | @param SystemContext A pointer to the processor context when\r | |
226 | the interrupt occurred on the processor.\r | |
227 | **/\r | |
228 | VOID\r | |
229 | EFIAPI\r | |
230 | DebugExceptionHandler (\r | |
053e878b MK |
231 | IN EFI_EXCEPTION_TYPE InterruptType,\r |
232 | IN EFI_SYSTEM_CONTEXT SystemContext\r | |
529a5a86 MK |
233 | )\r |
234 | {\r | |
235 | UINTN CpuIndex;\r | |
236 | UINTN PFEntry;\r | |
237 | \r | |
09afd9a4 JW |
238 | if (!mSmmProfileStart &&\r |
239 | !HEAP_GUARD_NONSTOP_MODE &&\r | |
053e878b MK |
240 | !NULL_DETECTION_NONSTOP_MODE)\r |
241 | {\r | |
529a5a86 MK |
242 | return;\r |
243 | }\r | |
053e878b | 244 | \r |
529a5a86 MK |
245 | CpuIndex = GetCpuIndex ();\r |
246 | \r | |
247 | //\r | |
248 | // Clear last PF entries\r | |
249 | //\r | |
250 | for (PFEntry = 0; PFEntry < mPFEntryCount[CpuIndex]; PFEntry++) {\r | |
251 | *mLastPFEntryPointer[CpuIndex][PFEntry] = mLastPFEntryValue[CpuIndex][PFEntry];\r | |
252 | }\r | |
253 | \r | |
254 | //\r | |
255 | // Reset page fault exception count for next page fault.\r | |
256 | //\r | |
257 | mPFEntryCount[CpuIndex] = 0;\r | |
258 | \r | |
259 | //\r | |
260 | // Flush TLB\r | |
261 | //\r | |
262 | CpuFlushTlb ();\r | |
263 | \r | |
264 | //\r | |
265 | // Clear TF in EFLAGS\r | |
266 | //\r | |
267 | ClearTrapFlag (SystemContext);\r | |
268 | }\r | |
269 | \r | |
97f1061e JF |
270 | /**\r |
271 | Check if the input address is in SMM ranges.\r | |
272 | \r | |
273 | @param[in] Address The input address.\r | |
274 | \r | |
275 | @retval TRUE The input address is in SMM.\r | |
276 | @retval FALSE The input address is not in SMM.\r | |
277 | **/\r | |
278 | BOOLEAN\r | |
279 | IsInSmmRanges (\r | |
053e878b | 280 | IN EFI_PHYSICAL_ADDRESS Address\r |
97f1061e JF |
281 | )\r |
282 | {\r | |
283 | UINTN Index;\r | |
284 | \r | |
29dc8aa8 | 285 | if ((Address >= mCpuHotPlugData.SmrrBase) && (Address < mCpuHotPlugData.SmrrBase + mCpuHotPlugData.SmrrSize)) {\r |
97f1061e JF |
286 | return TRUE;\r |
287 | }\r | |
053e878b | 288 | \r |
97f1061e | 289 | for (Index = 0; Index < mSmmCpuSmramRangeCount; Index++) {\r |
053e878b MK |
290 | if ((Address >= mSmmCpuSmramRanges[Index].CpuStart) &&\r |
291 | (Address < mSmmCpuSmramRanges[Index].CpuStart + mSmmCpuSmramRanges[Index].PhysicalSize))\r | |
292 | {\r | |
97f1061e JF |
293 | return TRUE;\r |
294 | }\r | |
295 | }\r | |
053e878b | 296 | \r |
97f1061e JF |
297 | return FALSE;\r |
298 | }\r | |
299 | \r | |
529a5a86 MK |
300 | /**\r |
301 | Check if the memory address will be mapped by 4KB-page.\r | |
302 | \r | |
303 | @param Address The address of Memory.\r | |
304 | @param Nx The flag indicates if the memory is execute-disable.\r | |
305 | \r | |
306 | **/\r | |
307 | BOOLEAN\r | |
308 | IsAddressValid (\r | |
053e878b MK |
309 | IN EFI_PHYSICAL_ADDRESS Address,\r |
310 | IN BOOLEAN *Nx\r | |
529a5a86 MK |
311 | )\r |
312 | {\r | |
313 | UINTN Index;\r | |
314 | \r | |
529a5a86 MK |
315 | if (FeaturePcdGet (PcdCpuSmmProfileEnable)) {\r |
316 | //\r | |
317 | // Check configuration\r | |
318 | //\r | |
319 | for (Index = 0; Index < mProtectionMemRangeCount; Index++) {\r | |
320 | if ((Address >= mProtectionMemRange[Index].Range.Base) && (Address < mProtectionMemRange[Index].Range.Top)) {\r | |
321 | *Nx = mProtectionMemRange[Index].Nx;\r | |
322 | return mProtectionMemRange[Index].Present;\r | |
323 | }\r | |
324 | }\r | |
053e878b | 325 | \r |
529a5a86 MK |
326 | *Nx = TRUE;\r |
327 | return FALSE;\r | |
529a5a86 | 328 | } else {\r |
97f1061e JF |
329 | *Nx = TRUE;\r |
330 | if (IsInSmmRanges (Address)) {\r | |
331 | *Nx = FALSE;\r | |
529a5a86 | 332 | }\r |
053e878b | 333 | \r |
529a5a86 MK |
334 | return TRUE;\r |
335 | }\r | |
336 | }\r | |
337 | \r | |
338 | /**\r | |
339 | Check if the memory address will be mapped by 4KB-page.\r | |
340 | \r | |
341 | @param Address The address of Memory.\r | |
342 | \r | |
343 | **/\r | |
344 | BOOLEAN\r | |
345 | IsAddressSplit (\r | |
053e878b | 346 | IN EFI_PHYSICAL_ADDRESS Address\r |
529a5a86 MK |
347 | )\r |
348 | {\r | |
349 | UINTN Index;\r | |
350 | \r | |
351 | if (FeaturePcdGet (PcdCpuSmmProfileEnable)) {\r | |
352 | //\r | |
353 | // Check configuration\r | |
354 | //\r | |
355 | for (Index = 0; Index < mSplitMemRangeCount; Index++) {\r | |
356 | if ((Address >= mSplitMemRange[Index].Base) && (Address < mSplitMemRange[Index].Top)) {\r | |
357 | return TRUE;\r | |
358 | }\r | |
359 | }\r | |
360 | } else {\r | |
361 | if (Address < mCpuHotPlugData.SmrrBase) {\r | |
362 | if ((mCpuHotPlugData.SmrrBase - Address) < BASE_2MB) {\r | |
363 | return TRUE;\r | |
364 | }\r | |
053e878b | 365 | } else if (Address > (mCpuHotPlugData.SmrrBase + mCpuHotPlugData.SmrrSize - BASE_2MB)) {\r |
529a5a86 MK |
366 | if ((Address - (mCpuHotPlugData.SmrrBase + mCpuHotPlugData.SmrrSize - BASE_2MB)) < BASE_2MB) {\r |
367 | return TRUE;\r | |
368 | }\r | |
369 | }\r | |
370 | }\r | |
053e878b | 371 | \r |
529a5a86 MK |
372 | //\r |
373 | // Return default\r | |
374 | //\r | |
375 | return FALSE;\r | |
376 | }\r | |
377 | \r | |
378 | /**\r | |
379 | Initialize the protected memory ranges and the 4KB-page mapped memory ranges.\r | |
380 | \r | |
381 | **/\r | |
382 | VOID\r | |
383 | InitProtectedMemRange (\r | |
384 | VOID\r | |
385 | )\r | |
386 | {\r | |
387 | UINTN Index;\r | |
388 | UINTN NumberOfDescriptors;\r | |
ee584389 | 389 | UINTN NumberOfAddedDescriptors;\r |
529a5a86 MK |
390 | UINTN NumberOfProtectRange;\r |
391 | UINTN NumberOfSpliteRange;\r | |
392 | EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap;\r | |
393 | UINTN TotalSize;\r | |
529a5a86 MK |
394 | EFI_PHYSICAL_ADDRESS ProtectBaseAddress;\r |
395 | EFI_PHYSICAL_ADDRESS ProtectEndAddress;\r | |
396 | EFI_PHYSICAL_ADDRESS Top2MBAlignedAddress;\r | |
397 | EFI_PHYSICAL_ADDRESS Base2MBAlignedAddress;\r | |
398 | UINT64 High4KBPageSize;\r | |
399 | UINT64 Low4KBPageSize;\r | |
400 | \r | |
401 | NumberOfDescriptors = 0;\r | |
ee584389 | 402 | NumberOfAddedDescriptors = mSmmCpuSmramRangeCount;\r |
529a5a86 MK |
403 | NumberOfSpliteRange = 0;\r |
404 | MemorySpaceMap = NULL;\r | |
405 | \r | |
406 | //\r | |
407 | // Get MMIO ranges from GCD and add them into protected memory ranges.\r | |
408 | //\r | |
dc0a7143 | 409 | gDS->GetMemorySpaceMap (\r |
053e878b MK |
410 | &NumberOfDescriptors,\r |
411 | &MemorySpaceMap\r | |
412 | );\r | |
529a5a86 MK |
413 | for (Index = 0; Index < NumberOfDescriptors; Index++) {\r |
414 | if (MemorySpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo) {\r | |
ee584389 | 415 | NumberOfAddedDescriptors++;\r |
529a5a86 MK |
416 | }\r |
417 | }\r | |
418 | \r | |
ee584389 | 419 | if (NumberOfAddedDescriptors != 0) {\r |
053e878b MK |
420 | TotalSize = NumberOfAddedDescriptors * sizeof (MEMORY_PROTECTION_RANGE) + sizeof (mProtectionMemRangeTemplate);\r |
421 | mProtectionMemRange = (MEMORY_PROTECTION_RANGE *)AllocateZeroPool (TotalSize);\r | |
529a5a86 MK |
422 | ASSERT (mProtectionMemRange != NULL);\r |
423 | mProtectionMemRangeCount = TotalSize / sizeof (MEMORY_PROTECTION_RANGE);\r | |
424 | \r | |
425 | //\r | |
426 | // Copy existing ranges.\r | |
427 | //\r | |
428 | CopyMem (mProtectionMemRange, mProtectionMemRangeTemplate, sizeof (mProtectionMemRangeTemplate));\r | |
429 | \r | |
430 | //\r | |
431 | // Create split ranges which come from protected ranges.\r | |
432 | //\r | |
053e878b MK |
433 | TotalSize = (TotalSize / sizeof (MEMORY_PROTECTION_RANGE)) * sizeof (MEMORY_RANGE);\r |
434 | mSplitMemRange = (MEMORY_RANGE *)AllocateZeroPool (TotalSize);\r | |
529a5a86 MK |
435 | ASSERT (mSplitMemRange != NULL);\r |
436 | \r | |
ee584389 JF |
437 | //\r |
438 | // Create SMM ranges which are set to present and execution-enable.\r | |
439 | //\r | |
440 | NumberOfProtectRange = sizeof (mProtectionMemRangeTemplate) / sizeof (MEMORY_PROTECTION_RANGE);\r | |
441 | for (Index = 0; Index < mSmmCpuSmramRangeCount; Index++) {\r | |
053e878b MK |
442 | if ((mSmmCpuSmramRanges[Index].CpuStart >= mProtectionMemRange[0].Range.Base) &&\r |
443 | (mSmmCpuSmramRanges[Index].CpuStart + mSmmCpuSmramRanges[Index].PhysicalSize < mProtectionMemRange[0].Range.Top))\r | |
444 | {\r | |
ee584389 JF |
445 | //\r |
446 | // If the address have been already covered by mCpuHotPlugData.SmrrBase/mCpuHotPlugData.SmrrSiz\r | |
447 | //\r | |
448 | break;\r | |
449 | }\r | |
053e878b | 450 | \r |
ee584389 JF |
451 | mProtectionMemRange[NumberOfProtectRange].Range.Base = mSmmCpuSmramRanges[Index].CpuStart;\r |
452 | mProtectionMemRange[NumberOfProtectRange].Range.Top = mSmmCpuSmramRanges[Index].CpuStart + mSmmCpuSmramRanges[Index].PhysicalSize;\r | |
453 | mProtectionMemRange[NumberOfProtectRange].Present = TRUE;\r | |
454 | mProtectionMemRange[NumberOfProtectRange].Nx = FALSE;\r | |
455 | NumberOfProtectRange++;\r | |
456 | }\r | |
457 | \r | |
529a5a86 MK |
458 | //\r |
459 | // Create MMIO ranges which are set to present and execution-disable.\r | |
460 | //\r | |
529a5a86 MK |
461 | for (Index = 0; Index < NumberOfDescriptors; Index++) {\r |
462 | if (MemorySpaceMap[Index].GcdMemoryType != EfiGcdMemoryTypeMemoryMappedIo) {\r | |
463 | continue;\r | |
464 | }\r | |
053e878b | 465 | \r |
529a5a86 MK |
466 | mProtectionMemRange[NumberOfProtectRange].Range.Base = MemorySpaceMap[Index].BaseAddress;\r |
467 | mProtectionMemRange[NumberOfProtectRange].Range.Top = MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length;\r | |
468 | mProtectionMemRange[NumberOfProtectRange].Present = TRUE;\r | |
469 | mProtectionMemRange[NumberOfProtectRange].Nx = TRUE;\r | |
470 | NumberOfProtectRange++;\r | |
471 | }\r | |
ee584389 JF |
472 | \r |
473 | //\r | |
474 | // Check and updated actual protected memory ranges count\r | |
475 | //\r | |
476 | ASSERT (NumberOfProtectRange <= mProtectionMemRangeCount);\r | |
477 | mProtectionMemRangeCount = NumberOfProtectRange;\r | |
529a5a86 MK |
478 | }\r |
479 | \r | |
480 | //\r | |
481 | // According to protected ranges, create the ranges which will be mapped by 2KB page.\r | |
482 | //\r | |
483 | NumberOfSpliteRange = 0;\r | |
484 | NumberOfProtectRange = mProtectionMemRangeCount;\r | |
485 | for (Index = 0; Index < NumberOfProtectRange; Index++) {\r | |
486 | //\r | |
487 | // If MMIO base address is not 2MB alignment, make 2MB alignment for create 4KB page in page table.\r | |
488 | //\r | |
489 | ProtectBaseAddress = mProtectionMemRange[Index].Range.Base;\r | |
490 | ProtectEndAddress = mProtectionMemRange[Index].Range.Top;\r | |
491 | if (((ProtectBaseAddress & (SIZE_2MB - 1)) != 0) || ((ProtectEndAddress & (SIZE_2MB - 1)) != 0)) {\r | |
492 | //\r | |
493 | // Check if it is possible to create 4KB-page for not 2MB-aligned range and to create 2MB-page for 2MB-aligned range.\r | |
494 | // A mix of 4KB and 2MB page could save SMRAM space.\r | |
495 | //\r | |
496 | Top2MBAlignedAddress = ProtectEndAddress & ~(SIZE_2MB - 1);\r | |
497 | Base2MBAlignedAddress = (ProtectBaseAddress + SIZE_2MB - 1) & ~(SIZE_2MB - 1);\r | |
498 | if ((Top2MBAlignedAddress > Base2MBAlignedAddress) &&\r | |
053e878b MK |
499 | ((Top2MBAlignedAddress - Base2MBAlignedAddress) >= SIZE_2MB))\r |
500 | {\r | |
529a5a86 MK |
501 | //\r |
502 | // There is an range which could be mapped by 2MB-page.\r | |
503 | //\r | |
504 | High4KBPageSize = ((ProtectEndAddress + SIZE_2MB - 1) & ~(SIZE_2MB - 1)) - (ProtectEndAddress & ~(SIZE_2MB - 1));\r | |
505 | Low4KBPageSize = ((ProtectBaseAddress + SIZE_2MB - 1) & ~(SIZE_2MB - 1)) - (ProtectBaseAddress & ~(SIZE_2MB - 1));\r | |
506 | if (High4KBPageSize != 0) {\r | |
507 | //\r | |
508 | // Add not 2MB-aligned range to be mapped by 4KB-page.\r | |
509 | //\r | |
510 | mSplitMemRange[NumberOfSpliteRange].Base = ProtectEndAddress & ~(SIZE_2MB - 1);\r | |
511 | mSplitMemRange[NumberOfSpliteRange].Top = (ProtectEndAddress + SIZE_2MB - 1) & ~(SIZE_2MB - 1);\r | |
512 | NumberOfSpliteRange++;\r | |
513 | }\r | |
053e878b | 514 | \r |
529a5a86 MK |
515 | if (Low4KBPageSize != 0) {\r |
516 | //\r | |
517 | // Add not 2MB-aligned range to be mapped by 4KB-page.\r | |
518 | //\r | |
519 | mSplitMemRange[NumberOfSpliteRange].Base = ProtectBaseAddress & ~(SIZE_2MB - 1);\r | |
520 | mSplitMemRange[NumberOfSpliteRange].Top = (ProtectBaseAddress + SIZE_2MB - 1) & ~(SIZE_2MB - 1);\r | |
521 | NumberOfSpliteRange++;\r | |
522 | }\r | |
523 | } else {\r | |
524 | //\r | |
525 | // The range could only be mapped by 4KB-page.\r | |
526 | //\r | |
527 | mSplitMemRange[NumberOfSpliteRange].Base = ProtectBaseAddress & ~(SIZE_2MB - 1);\r | |
528 | mSplitMemRange[NumberOfSpliteRange].Top = (ProtectEndAddress + SIZE_2MB - 1) & ~(SIZE_2MB - 1);\r | |
529 | NumberOfSpliteRange++;\r | |
530 | }\r | |
531 | }\r | |
532 | }\r | |
533 | \r | |
534 | mSplitMemRangeCount = NumberOfSpliteRange;\r | |
535 | \r | |
96e1cba5 | 536 | DEBUG ((DEBUG_INFO, "SMM Profile Memory Ranges:\n"));\r |
529a5a86 | 537 | for (Index = 0; Index < mProtectionMemRangeCount; Index++) {\r |
96e1cba5 MK |
538 | DEBUG ((DEBUG_INFO, "mProtectionMemRange[%d].Base = %lx\n", Index, mProtectionMemRange[Index].Range.Base));\r |
539 | DEBUG ((DEBUG_INFO, "mProtectionMemRange[%d].Top = %lx\n", Index, mProtectionMemRange[Index].Range.Top));\r | |
529a5a86 | 540 | }\r |
053e878b | 541 | \r |
529a5a86 | 542 | for (Index = 0; Index < mSplitMemRangeCount; Index++) {\r |
96e1cba5 MK |
543 | DEBUG ((DEBUG_INFO, "mSplitMemRange[%d].Base = %lx\n", Index, mSplitMemRange[Index].Base));\r |
544 | DEBUG ((DEBUG_INFO, "mSplitMemRange[%d].Top = %lx\n", Index, mSplitMemRange[Index].Top));\r | |
529a5a86 MK |
545 | }\r |
546 | }\r | |
547 | \r | |
548 | /**\r | |
549 | Update page table according to protected memory ranges and the 4KB-page mapped memory ranges.\r | |
550 | \r | |
551 | **/\r | |
552 | VOID\r | |
553 | InitPaging (\r | |
554 | VOID\r | |
555 | )\r | |
556 | {\r | |
053e878b MK |
557 | UINT64 Pml5Entry;\r |
558 | UINT64 Pml4Entry;\r | |
559 | UINT64 *Pml5;\r | |
560 | UINT64 *Pml4;\r | |
561 | UINT64 *Pdpt;\r | |
562 | UINT64 *Pd;\r | |
563 | UINT64 *Pt;\r | |
564 | UINTN Address;\r | |
565 | UINTN Pml5Index;\r | |
566 | UINTN Pml4Index;\r | |
567 | UINTN PdptIndex;\r | |
568 | UINTN PdIndex;\r | |
569 | UINTN PtIndex;\r | |
570 | UINTN NumberOfPdptEntries;\r | |
571 | UINTN NumberOfPml4Entries;\r | |
572 | UINTN NumberOfPml5Entries;\r | |
573 | UINTN SizeOfMemorySpace;\r | |
574 | BOOLEAN Nx;\r | |
575 | IA32_CR4 Cr4;\r | |
576 | BOOLEAN Enable5LevelPaging;\r | |
577 | \r | |
578 | Cr4.UintN = AsmReadCr4 ();\r | |
579 | Enable5LevelPaging = (BOOLEAN)(Cr4.Bits.LA57 == 1);\r | |
529a5a86 MK |
580 | \r |
581 | if (sizeof (UINTN) == sizeof (UINT64)) {\r | |
4eee0cc7 | 582 | if (!Enable5LevelPaging) {\r |
053e878b MK |
583 | Pml5Entry = (UINTN)mSmmProfileCr3 | IA32_PG_P;\r |
584 | Pml5 = &Pml5Entry;\r | |
4eee0cc7 | 585 | } else {\r |
053e878b | 586 | Pml5 = (UINT64 *)(UINTN)mSmmProfileCr3;\r |
4eee0cc7 | 587 | }\r |
053e878b | 588 | \r |
529a5a86 MK |
589 | SizeOfMemorySpace = HighBitSet64 (gPhyMask) + 1;\r |
590 | //\r | |
591 | // Calculate the table entries of PML4E and PDPTE.\r | |
592 | //\r | |
4eee0cc7 RN |
593 | NumberOfPml5Entries = 1;\r |
594 | if (SizeOfMemorySpace > 48) {\r | |
053e878b MK |
595 | NumberOfPml5Entries = (UINTN)LShiftU64 (1, SizeOfMemorySpace - 48);\r |
596 | SizeOfMemorySpace = 48;\r | |
7365eb2c | 597 | }\r |
4eee0cc7 | 598 | \r |
4e78c7be | 599 | NumberOfPml4Entries = 1;\r |
4eee0cc7 | 600 | if (SizeOfMemorySpace > 39) {\r |
053e878b MK |
601 | NumberOfPml4Entries = (UINTN)LShiftU64 (1, SizeOfMemorySpace - 39);\r |
602 | SizeOfMemorySpace = 39;\r | |
4eee0cc7 RN |
603 | }\r |
604 | \r | |
605 | NumberOfPdptEntries = 1;\r | |
606 | ASSERT (SizeOfMemorySpace > 30);\r | |
053e878b | 607 | NumberOfPdptEntries = (UINTN)LShiftU64 (1, SizeOfMemorySpace - 30);\r |
4eee0cc7 | 608 | } else {\r |
053e878b MK |
609 | Pml4Entry = (UINTN)mSmmProfileCr3 | IA32_PG_P;\r |
610 | Pml4 = &Pml4Entry;\r | |
611 | Pml5Entry = (UINTN)Pml4 | IA32_PG_P;\r | |
612 | Pml5 = &Pml5Entry;\r | |
613 | NumberOfPml5Entries = 1;\r | |
614 | NumberOfPml4Entries = 1;\r | |
615 | NumberOfPdptEntries = 4;\r | |
529a5a86 MK |
616 | }\r |
617 | \r | |
618 | //\r | |
619 | // Go through page table and change 2MB-page into 4KB-page.\r | |
620 | //\r | |
4eee0cc7 RN |
621 | for (Pml5Index = 0; Pml5Index < NumberOfPml5Entries; Pml5Index++) {\r |
622 | if ((Pml5[Pml5Index] & IA32_PG_P) == 0) {\r | |
623 | //\r | |
624 | // If PML5 entry does not exist, skip it\r | |
625 | //\r | |
626 | continue;\r | |
627 | }\r | |
053e878b MK |
628 | \r |
629 | Pml4 = (UINT64 *)(UINTN)(Pml5[Pml5Index] & PHYSICAL_ADDRESS_MASK);\r | |
4eee0cc7 | 630 | for (Pml4Index = 0; Pml4Index < NumberOfPml4Entries; Pml4Index++) {\r |
7e56f892 | 631 | if ((Pml4[Pml4Index] & IA32_PG_P) == 0) {\r |
529a5a86 | 632 | //\r |
7e56f892 | 633 | // If PML4 entry does not exist, skip it\r |
529a5a86 MK |
634 | //\r |
635 | continue;\r | |
636 | }\r | |
053e878b | 637 | \r |
7e56f892 | 638 | Pdpt = (UINT64 *)(UINTN)(Pml4[Pml4Index] & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);\r |
4eee0cc7 RN |
639 | for (PdptIndex = 0; PdptIndex < NumberOfPdptEntries; PdptIndex++, Pdpt++) {\r |
640 | if ((*Pdpt & IA32_PG_P) == 0) {\r | |
641 | //\r | |
642 | // If PDPT entry does not exist, skip it\r | |
643 | //\r | |
644 | continue;\r | |
645 | }\r | |
053e878b | 646 | \r |
4eee0cc7 | 647 | if ((*Pdpt & IA32_PG_PS) != 0) {\r |
529a5a86 | 648 | //\r |
4eee0cc7 | 649 | // This is 1G entry, skip it\r |
529a5a86 MK |
650 | //\r |
651 | continue;\r | |
652 | }\r | |
053e878b | 653 | \r |
4eee0cc7 RN |
654 | Pd = (UINT64 *)(UINTN)(*Pdpt & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);\r |
655 | if (Pd == 0) {\r | |
656 | continue;\r | |
657 | }\r | |
053e878b | 658 | \r |
4eee0cc7 RN |
659 | for (PdIndex = 0; PdIndex < SIZE_4KB / sizeof (*Pd); PdIndex++, Pd++) {\r |
660 | if ((*Pd & IA32_PG_P) == 0) {\r | |
661 | //\r | |
662 | // If PD entry does not exist, skip it\r | |
663 | //\r | |
664 | continue;\r | |
665 | }\r | |
053e878b MK |
666 | \r |
667 | Address = (UINTN)LShiftU64 (\r | |
668 | LShiftU64 (\r | |
669 | LShiftU64 ((Pml5Index << 9) + Pml4Index, 9) + PdptIndex,\r | |
670 | 9\r | |
671 | ) + PdIndex,\r | |
672 | 21\r | |
673 | );\r | |
529a5a86 | 674 | \r |
529a5a86 | 675 | //\r |
4eee0cc7 | 676 | // If it is 2M page, check IsAddressSplit()\r |
529a5a86 | 677 | //\r |
4eee0cc7 RN |
678 | if (((*Pd & IA32_PG_PS) != 0) && IsAddressSplit (Address)) {\r |
679 | //\r | |
680 | // Based on current page table, create 4KB page table for split area.\r | |
681 | //\r | |
682 | ASSERT (Address == (*Pd & PHYSICAL_ADDRESS_MASK));\r | |
683 | \r | |
684 | Pt = AllocatePageTableMemory (1);\r | |
685 | ASSERT (Pt != NULL);\r | |
529a5a86 | 686 | \r |
4eee0cc7 | 687 | // Split it\r |
053e878b | 688 | for (PtIndex = 0; PtIndex < SIZE_4KB / sizeof (*Pt); PtIndex++) {\r |
a5235562 | 689 | Pt[PtIndex] = Address + ((PtIndex << 12) | mAddressEncMask | PAGE_ATTRIBUTE_BITS);\r |
4eee0cc7 | 690 | } // end for PT\r |
053e878b | 691 | \r |
4eee0cc7 RN |
692 | *Pd = (UINT64)(UINTN)Pt | mAddressEncMask | PAGE_ATTRIBUTE_BITS;\r |
693 | } // end if IsAddressSplit\r | |
694 | } // end for PD\r | |
695 | } // end for PDPT\r | |
696 | } // end for PML4\r | |
697 | } // end for PML5\r | |
529a5a86 MK |
698 | \r |
699 | //\r | |
700 | // Go through page table and set several page table entries to absent or execute-disable.\r | |
701 | //\r | |
96e1cba5 | 702 | DEBUG ((DEBUG_INFO, "Patch page table start ...\n"));\r |
4eee0cc7 RN |
703 | for (Pml5Index = 0; Pml5Index < NumberOfPml5Entries; Pml5Index++) {\r |
704 | if ((Pml5[Pml5Index] & IA32_PG_P) == 0) {\r | |
705 | //\r | |
706 | // If PML5 entry does not exist, skip it\r | |
707 | //\r | |
708 | continue;\r | |
709 | }\r | |
053e878b MK |
710 | \r |
711 | Pml4 = (UINT64 *)(UINTN)(Pml5[Pml5Index] & PHYSICAL_ADDRESS_MASK);\r | |
4eee0cc7 | 712 | for (Pml4Index = 0; Pml4Index < NumberOfPml4Entries; Pml4Index++) {\r |
7e56f892 | 713 | if ((Pml4[Pml4Index] & IA32_PG_P) == 0) {\r |
529a5a86 | 714 | //\r |
7e56f892 | 715 | // If PML4 entry does not exist, skip it\r |
529a5a86 MK |
716 | //\r |
717 | continue;\r | |
718 | }\r | |
053e878b | 719 | \r |
7e56f892 | 720 | Pdpt = (UINT64 *)(UINTN)(Pml4[Pml4Index] & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);\r |
4eee0cc7 RN |
721 | for (PdptIndex = 0; PdptIndex < NumberOfPdptEntries; PdptIndex++, Pdpt++) {\r |
722 | if ((*Pdpt & IA32_PG_P) == 0) {\r | |
723 | //\r | |
724 | // If PDPT entry does not exist, skip it\r | |
725 | //\r | |
726 | continue;\r | |
717fb604 | 727 | }\r |
053e878b | 728 | \r |
4eee0cc7 | 729 | if ((*Pdpt & IA32_PG_PS) != 0) {\r |
529a5a86 | 730 | //\r |
4eee0cc7 | 731 | // This is 1G entry, set NX bit and skip it\r |
529a5a86 | 732 | //\r |
4eee0cc7 RN |
733 | if (mXdSupported) {\r |
734 | *Pdpt = *Pdpt | IA32_PG_NX;\r | |
735 | }\r | |
053e878b | 736 | \r |
529a5a86 MK |
737 | continue;\r |
738 | }\r | |
053e878b | 739 | \r |
4eee0cc7 RN |
740 | Pd = (UINT64 *)(UINTN)(*Pdpt & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);\r |
741 | if (Pd == 0) {\r | |
742 | continue;\r | |
743 | }\r | |
053e878b | 744 | \r |
4eee0cc7 RN |
745 | for (PdIndex = 0; PdIndex < SIZE_4KB / sizeof (*Pd); PdIndex++, Pd++) {\r |
746 | if ((*Pd & IA32_PG_P) == 0) {\r | |
529a5a86 | 747 | //\r |
4eee0cc7 | 748 | // If PD entry does not exist, skip it\r |
529a5a86 | 749 | //\r |
529a5a86 MK |
750 | continue;\r |
751 | }\r | |
053e878b MK |
752 | \r |
753 | Address = (UINTN)LShiftU64 (\r | |
754 | LShiftU64 (\r | |
755 | LShiftU64 ((Pml5Index << 9) + Pml4Index, 9) + PdptIndex,\r | |
756 | 9\r | |
757 | ) + PdIndex,\r | |
758 | 21\r | |
759 | );\r | |
4eee0cc7 RN |
760 | \r |
761 | if ((*Pd & IA32_PG_PS) != 0) {\r | |
762 | // 2MB page\r | |
763 | \r | |
529a5a86 | 764 | if (!IsAddressValid (Address, &Nx)) {\r |
4eee0cc7 RN |
765 | //\r |
766 | // Patch to remove Present flag and RW flag\r | |
767 | //\r | |
768 | *Pd = *Pd & (INTN)(INT32)(~PAGE_ATTRIBUTE_BITS);\r | |
529a5a86 | 769 | }\r |
053e878b | 770 | \r |
529a5a86 | 771 | if (Nx && mXdSupported) {\r |
4eee0cc7 RN |
772 | *Pd = *Pd | IA32_PG_NX;\r |
773 | }\r | |
774 | } else {\r | |
775 | // 4KB page\r | |
776 | Pt = (UINT64 *)(UINTN)(*Pd & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);\r | |
777 | if (Pt == 0) {\r | |
778 | continue;\r | |
529a5a86 | 779 | }\r |
053e878b MK |
780 | \r |
781 | for (PtIndex = 0; PtIndex < SIZE_4KB / sizeof (*Pt); PtIndex++, Pt++) {\r | |
4eee0cc7 RN |
782 | if (!IsAddressValid (Address, &Nx)) {\r |
783 | *Pt = *Pt & (INTN)(INT32)(~PAGE_ATTRIBUTE_BITS);\r | |
784 | }\r | |
053e878b | 785 | \r |
4eee0cc7 RN |
786 | if (Nx && mXdSupported) {\r |
787 | *Pt = *Pt | IA32_PG_NX;\r | |
788 | }\r | |
053e878b | 789 | \r |
4eee0cc7 RN |
790 | Address += SIZE_4KB;\r |
791 | } // end for PT\r | |
792 | } // end if PS\r | |
793 | } // end for PD\r | |
794 | } // end for PDPT\r | |
795 | } // end for PML4\r | |
796 | } // end for PML5\r | |
529a5a86 MK |
797 | \r |
798 | //\r | |
799 | // Flush TLB\r | |
800 | //\r | |
801 | CpuFlushTlb ();\r | |
96e1cba5 | 802 | DEBUG ((DEBUG_INFO, "Patch page table done!\n"));\r |
529a5a86 MK |
803 | //\r |
804 | // Set execute-disable flag\r | |
805 | //\r | |
806 | mXdEnabled = TRUE;\r | |
807 | \r | |
053e878b | 808 | return;\r |
529a5a86 MK |
809 | }\r |
810 | \r | |
529a5a86 MK |
811 | /**\r |
812 | To get system port address of the SMI Command Port in FADT table.\r | |
813 | \r | |
814 | **/\r | |
815 | VOID\r | |
816 | GetSmiCommandPort (\r | |
817 | VOID\r | |
818 | )\r | |
819 | {\r | |
053e878b | 820 | EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt;\r |
529a5a86 | 821 | \r |
053e878b MK |
822 | Fadt = (EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *)EfiLocateFirstAcpiTable (\r |
823 | EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE_SIGNATURE\r | |
824 | );\r | |
529a5a86 MK |
825 | ASSERT (Fadt != NULL);\r |
826 | \r | |
827 | mSmiCommandPort = Fadt->SmiCmd;\r | |
96e1cba5 | 828 | DEBUG ((DEBUG_INFO, "mSmiCommandPort = %x\n", mSmiCommandPort));\r |
529a5a86 MK |
829 | }\r |
830 | \r | |
831 | /**\r | |
832 | Updates page table to make some memory ranges (like system memory) absent\r | |
833 | and make some memory ranges (like MMIO) present and execute disable. It also\r | |
834 | update 2MB-page to 4KB-page for some memory ranges.\r | |
835 | \r | |
836 | **/\r | |
837 | VOID\r | |
838 | SmmProfileStart (\r | |
839 | VOID\r | |
840 | )\r | |
841 | {\r | |
842 | //\r | |
843 | // The flag indicates SMM profile starts to work.\r | |
844 | //\r | |
845 | mSmmProfileStart = TRUE;\r | |
846 | }\r | |
847 | \r | |
848 | /**\r | |
849 | Initialize SMM profile in SmmReadyToLock protocol callback function.\r | |
850 | \r | |
851 | @param Protocol Points to the protocol's unique identifier.\r | |
852 | @param Interface Points to the interface instance.\r | |
853 | @param Handle The handle on which the interface was installed.\r | |
854 | \r | |
855 | @retval EFI_SUCCESS SmmReadyToLock protocol callback runs successfully.\r | |
856 | **/\r | |
857 | EFI_STATUS\r | |
858 | EFIAPI\r | |
859 | InitSmmProfileCallBack (\r | |
860 | IN CONST EFI_GUID *Protocol,\r | |
861 | IN VOID *Interface,\r | |
862 | IN EFI_HANDLE Handle\r | |
863 | )\r | |
864 | {\r | |
529a5a86 MK |
865 | //\r |
866 | // Save to variable so that SMM profile data can be found.\r | |
867 | //\r | |
dc0a7143 LE |
868 | gRT->SetVariable (\r |
869 | SMM_PROFILE_NAME,\r | |
870 | &gEfiCallerIdGuid,\r | |
871 | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r | |
053e878b | 872 | sizeof (mSmmProfileBase),\r |
dc0a7143 LE |
873 | &mSmmProfileBase\r |
874 | );\r | |
529a5a86 MK |
875 | \r |
876 | //\r | |
877 | // Get Software SMI from FADT\r | |
878 | //\r | |
879 | GetSmiCommandPort ();\r | |
880 | \r | |
881 | //\r | |
882 | // Initialize protected memory range for patching page table later.\r | |
883 | //\r | |
884 | InitProtectedMemRange ();\r | |
885 | \r | |
886 | return EFI_SUCCESS;\r | |
887 | }\r | |
888 | \r | |
889 | /**\r | |
890 | Initialize SMM profile data structures.\r | |
891 | \r | |
892 | **/\r | |
893 | VOID\r | |
894 | InitSmmProfileInternal (\r | |
895 | VOID\r | |
896 | )\r | |
897 | {\r | |
053e878b MK |
898 | EFI_STATUS Status;\r |
899 | EFI_PHYSICAL_ADDRESS Base;\r | |
900 | VOID *Registration;\r | |
901 | UINTN Index;\r | |
902 | UINTN MsrDsAreaSizePerCpu;\r | |
903 | UINTN TotalSize;\r | |
529a5a86 | 904 | \r |
bb767506 | 905 | mPFEntryCount = (UINTN *)AllocateZeroPool (sizeof (UINTN) * mMaxNumberOfCpus);\r |
529a5a86 | 906 | ASSERT (mPFEntryCount != NULL);\r |
053e878b MK |
907 | mLastPFEntryValue = (UINT64 (*)[MAX_PF_ENTRY_COUNT])AllocateZeroPool (\r |
908 | sizeof (mLastPFEntryValue[0]) * mMaxNumberOfCpus\r | |
909 | );\r | |
529a5a86 MK |
910 | ASSERT (mLastPFEntryValue != NULL);\r |
911 | mLastPFEntryPointer = (UINT64 *(*)[MAX_PF_ENTRY_COUNT])AllocateZeroPool (\r | |
053e878b MK |
912 | sizeof (mLastPFEntryPointer[0]) * mMaxNumberOfCpus\r |
913 | );\r | |
529a5a86 MK |
914 | ASSERT (mLastPFEntryPointer != NULL);\r |
915 | \r | |
916 | //\r | |
917 | // Allocate memory for SmmProfile below 4GB.\r | |
918 | // The base address\r | |
919 | //\r | |
920 | mSmmProfileSize = PcdGet32 (PcdCpuSmmProfileSize);\r | |
921 | ASSERT ((mSmmProfileSize & 0xFFF) == 0);\r | |
922 | \r | |
923 | if (mBtsSupported) {\r | |
924 | TotalSize = mSmmProfileSize + mMsrDsAreaSize;\r | |
925 | } else {\r | |
926 | TotalSize = mSmmProfileSize;\r | |
927 | }\r | |
928 | \r | |
053e878b | 929 | Base = 0xFFFFFFFF;\r |
529a5a86 MK |
930 | Status = gBS->AllocatePages (\r |
931 | AllocateMaxAddress,\r | |
932 | EfiReservedMemoryType,\r | |
933 | EFI_SIZE_TO_PAGES (TotalSize),\r | |
934 | &Base\r | |
935 | );\r | |
936 | ASSERT_EFI_ERROR (Status);\r | |
937 | ZeroMem ((VOID *)(UINTN)Base, TotalSize);\r | |
938 | mSmmProfileBase = (SMM_PROFILE_HEADER *)(UINTN)Base;\r | |
939 | \r | |
940 | //\r | |
941 | // Initialize SMM profile data header.\r | |
942 | //\r | |
943 | mSmmProfileBase->HeaderSize = sizeof (SMM_PROFILE_HEADER);\r | |
053e878b MK |
944 | mSmmProfileBase->MaxDataEntries = (UINT64)((mSmmProfileSize - sizeof (SMM_PROFILE_HEADER)) / sizeof (SMM_PROFILE_ENTRY));\r |
945 | mSmmProfileBase->MaxDataSize = MultU64x64 (mSmmProfileBase->MaxDataEntries, sizeof (SMM_PROFILE_ENTRY));\r | |
529a5a86 MK |
946 | mSmmProfileBase->CurDataEntries = 0;\r |
947 | mSmmProfileBase->CurDataSize = 0;\r | |
948 | mSmmProfileBase->TsegStart = mCpuHotPlugData.SmrrBase;\r | |
949 | mSmmProfileBase->TsegSize = mCpuHotPlugData.SmrrSize;\r | |
950 | mSmmProfileBase->NumSmis = 0;\r | |
951 | mSmmProfileBase->NumCpus = gSmmCpuPrivate->SmmCoreEntryContext.NumberOfCpus;\r | |
952 | \r | |
953 | if (mBtsSupported) {\r | |
bb767506 | 954 | mMsrDsArea = (MSR_DS_AREA_STRUCT **)AllocateZeroPool (sizeof (MSR_DS_AREA_STRUCT *) * mMaxNumberOfCpus);\r |
529a5a86 | 955 | ASSERT (mMsrDsArea != NULL);\r |
bb767506 | 956 | mMsrBTSRecord = (BRANCH_TRACE_RECORD **)AllocateZeroPool (sizeof (BRANCH_TRACE_RECORD *) * mMaxNumberOfCpus);\r |
529a5a86 | 957 | ASSERT (mMsrBTSRecord != NULL);\r |
bb767506 | 958 | mMsrPEBSRecord = (PEBS_RECORD **)AllocateZeroPool (sizeof (PEBS_RECORD *) * mMaxNumberOfCpus);\r |
529a5a86 MK |
959 | ASSERT (mMsrPEBSRecord != NULL);\r |
960 | \r | |
053e878b | 961 | mMsrDsAreaBase = (MSR_DS_AREA_STRUCT *)((UINTN)Base + mSmmProfileSize);\r |
bb767506 | 962 | MsrDsAreaSizePerCpu = mMsrDsAreaSize / mMaxNumberOfCpus;\r |
053e878b | 963 | mBTSRecordNumber = (MsrDsAreaSizePerCpu - sizeof (PEBS_RECORD) * PEBS_RECORD_NUMBER - sizeof (MSR_DS_AREA_STRUCT)) / sizeof (BRANCH_TRACE_RECORD);\r |
bb767506 | 964 | for (Index = 0; Index < mMaxNumberOfCpus; Index++) {\r |
529a5a86 | 965 | mMsrDsArea[Index] = (MSR_DS_AREA_STRUCT *)((UINTN)mMsrDsAreaBase + MsrDsAreaSizePerCpu * Index);\r |
053e878b MK |
966 | mMsrBTSRecord[Index] = (BRANCH_TRACE_RECORD *)((UINTN)mMsrDsArea[Index] + sizeof (MSR_DS_AREA_STRUCT));\r |
967 | mMsrPEBSRecord[Index] = (PEBS_RECORD *)((UINTN)mMsrDsArea[Index] + MsrDsAreaSizePerCpu - sizeof (PEBS_RECORD) * PEBS_RECORD_NUMBER);\r | |
529a5a86 | 968 | \r |
053e878b MK |
969 | mMsrDsArea[Index]->BTSBufferBase = (UINTN)mMsrBTSRecord[Index];\r |
970 | mMsrDsArea[Index]->BTSIndex = mMsrDsArea[Index]->BTSBufferBase;\r | |
971 | mMsrDsArea[Index]->BTSAbsoluteMaximum = mMsrDsArea[Index]->BTSBufferBase + mBTSRecordNumber * sizeof (BRANCH_TRACE_RECORD) + 1;\r | |
972 | mMsrDsArea[Index]->BTSInterruptThreshold = mMsrDsArea[Index]->BTSAbsoluteMaximum + 1;\r | |
529a5a86 MK |
973 | \r |
974 | mMsrDsArea[Index]->PEBSBufferBase = (UINTN)mMsrPEBSRecord[Index];\r | |
975 | mMsrDsArea[Index]->PEBSIndex = mMsrDsArea[Index]->PEBSBufferBase;\r | |
053e878b | 976 | mMsrDsArea[Index]->PEBSAbsoluteMaximum = mMsrDsArea[Index]->PEBSBufferBase + PEBS_RECORD_NUMBER * sizeof (PEBS_RECORD) + 1;\r |
529a5a86 MK |
977 | mMsrDsArea[Index]->PEBSInterruptThreshold = mMsrDsArea[Index]->PEBSAbsoluteMaximum + 1;\r |
978 | }\r | |
979 | }\r | |
980 | \r | |
981 | mProtectionMemRange = mProtectionMemRangeTemplate;\r | |
982 | mProtectionMemRangeCount = sizeof (mProtectionMemRangeTemplate) / sizeof (MEMORY_PROTECTION_RANGE);\r | |
983 | \r | |
984 | //\r | |
985 | // Update TSeg entry.\r | |
986 | //\r | |
987 | mProtectionMemRange[0].Range.Base = mCpuHotPlugData.SmrrBase;\r | |
988 | mProtectionMemRange[0].Range.Top = mCpuHotPlugData.SmrrBase + mCpuHotPlugData.SmrrSize;\r | |
989 | \r | |
990 | //\r | |
991 | // Update SMM profile entry.\r | |
992 | //\r | |
993 | mProtectionMemRange[1].Range.Base = (EFI_PHYSICAL_ADDRESS)(UINTN)mSmmProfileBase;\r | |
994 | mProtectionMemRange[1].Range.Top = (EFI_PHYSICAL_ADDRESS)(UINTN)mSmmProfileBase + TotalSize;\r | |
995 | \r | |
996 | //\r | |
997 | // Allocate memory reserved for creating 4KB pages.\r | |
998 | //\r | |
999 | InitPagesForPFHandler ();\r | |
1000 | \r | |
1001 | //\r | |
1002 | // Start SMM profile when SmmReadyToLock protocol is installed.\r | |
1003 | //\r | |
1004 | Status = gSmst->SmmRegisterProtocolNotify (\r | |
1005 | &gEfiSmmReadyToLockProtocolGuid,\r | |
1006 | InitSmmProfileCallBack,\r | |
1007 | &Registration\r | |
1008 | );\r | |
1009 | ASSERT_EFI_ERROR (Status);\r | |
1010 | \r | |
053e878b | 1011 | return;\r |
529a5a86 MK |
1012 | }\r |
1013 | \r | |
1014 | /**\r | |
3eb69b08 | 1015 | Check if feature is supported by a processor.\r |
529a5a86 MK |
1016 | \r |
1017 | **/\r | |
1018 | VOID\r | |
1019 | CheckFeatureSupported (\r | |
51773d49 | 1020 | VOID\r |
529a5a86 MK |
1021 | )\r |
1022 | {\r | |
f85d3ce2 | 1023 | UINT32 RegEax;\r |
3eb69b08 | 1024 | UINT32 RegEcx;\r |
f85d3ce2 JF |
1025 | UINT32 RegEdx;\r |
1026 | MSR_IA32_MISC_ENABLE_REGISTER MiscEnableMsr;\r | |
529a5a86 | 1027 | \r |
3eb69b08 | 1028 | if ((PcdGet32 (PcdControlFlowEnforcementPropertyMask) != 0) && mCetSupported) {\r |
5d34cc49 WH |
1029 | AsmCpuid (CPUID_SIGNATURE, &RegEax, NULL, NULL, NULL);\r |
1030 | if (RegEax >= CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS) {\r | |
1031 | AsmCpuidEx (CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS, CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_SUB_LEAF_INFO, NULL, NULL, &RegEcx, NULL);\r | |
1032 | if ((RegEcx & CPUID_CET_SS) == 0) {\r | |
1033 | mCetSupported = FALSE;\r | |
1034 | PatchInstructionX86 (mPatchCetSupported, mCetSupported, 1);\r | |
1035 | }\r | |
1036 | } else {\r | |
3eb69b08 JY |
1037 | mCetSupported = FALSE;\r |
1038 | PatchInstructionX86 (mPatchCetSupported, mCetSupported, 1);\r | |
1039 | }\r | |
1040 | }\r | |
1041 | \r | |
529a5a86 MK |
1042 | if (mXdSupported) {\r |
1043 | AsmCpuid (CPUID_EXTENDED_FUNCTION, &RegEax, NULL, NULL, NULL);\r | |
1044 | if (RegEax <= CPUID_EXTENDED_FUNCTION) {\r | |
1045 | //\r | |
1046 | // Extended CPUID functions are not supported on this processor.\r | |
1047 | //\r | |
1048 | mXdSupported = FALSE;\r | |
3c5ce64f | 1049 | PatchInstructionX86 (gPatchXdSupported, mXdSupported, 1);\r |
529a5a86 MK |
1050 | }\r |
1051 | \r | |
1052 | AsmCpuid (CPUID_EXTENDED_CPU_SIG, NULL, NULL, NULL, &RegEdx);\r | |
1053 | if ((RegEdx & CPUID1_EDX_XD_SUPPORT) == 0) {\r | |
1054 | //\r | |
1055 | // Execute Disable Bit feature is not supported on this processor.\r | |
1056 | //\r | |
1057 | mXdSupported = FALSE;\r | |
3c5ce64f | 1058 | PatchInstructionX86 (gPatchXdSupported, mXdSupported, 1);\r |
529a5a86 | 1059 | }\r |
bdafda8c KG |
1060 | \r |
1061 | if (StandardSignatureIsAuthenticAMD ()) {\r | |
1062 | //\r | |
1063 | // AMD processors do not support MSR_IA32_MISC_ENABLE\r | |
1064 | //\r | |
1065 | PatchInstructionX86 (gPatchMsrIa32MiscEnableSupported, FALSE, 1);\r | |
1066 | }\r | |
529a5a86 MK |
1067 | }\r |
1068 | \r | |
1069 | if (mBtsSupported) {\r | |
1070 | AsmCpuid (CPUID_VERSION_INFO, NULL, NULL, NULL, &RegEdx);\r | |
1071 | if ((RegEdx & CPUID1_EDX_BTS_AVAILABLE) != 0) {\r | |
1072 | //\r | |
1073 | // Per IA32 manuals:\r | |
1074 | // When CPUID.1:EDX[21] is set, the following BTS facilities are available:\r | |
1075 | // 1. The BTS_UNAVAILABLE flag in the IA32_MISC_ENABLE MSR indicates the\r | |
1076 | // availability of the BTS facilities, including the ability to set the BTS and\r | |
1077 | // BTINT bits in the MSR_DEBUGCTLA MSR.\r | |
1078 | // 2. The IA32_DS_AREA MSR can be programmed to point to the DS save area.\r | |
1079 | //\r | |
f85d3ce2 JF |
1080 | MiscEnableMsr.Uint64 = AsmReadMsr64 (MSR_IA32_MISC_ENABLE);\r |
1081 | if (MiscEnableMsr.Bits.BTS == 1) {\r | |
529a5a86 | 1082 | //\r |
f85d3ce2 | 1083 | // BTS facilities is not supported if MSR_IA32_MISC_ENABLE.BTS bit is set.\r |
529a5a86 MK |
1084 | //\r |
1085 | mBtsSupported = FALSE;\r | |
1086 | }\r | |
1087 | }\r | |
1088 | }\r | |
1089 | }\r | |
1090 | \r | |
529a5a86 MK |
1091 | /**\r |
1092 | Enable single step.\r | |
1093 | \r | |
1094 | **/\r | |
1095 | VOID\r | |
1096 | ActivateSingleStepDB (\r | |
1097 | VOID\r | |
1098 | )\r | |
1099 | {\r | |
053e878b | 1100 | UINTN Dr6;\r |
529a5a86 MK |
1101 | \r |
1102 | Dr6 = AsmReadDr6 ();\r | |
1103 | if ((Dr6 & DR6_SINGLE_STEP) != 0) {\r | |
1104 | return;\r | |
1105 | }\r | |
053e878b | 1106 | \r |
529a5a86 MK |
1107 | Dr6 |= DR6_SINGLE_STEP;\r |
1108 | AsmWriteDr6 (Dr6);\r | |
1109 | }\r | |
1110 | \r | |
1111 | /**\r | |
1112 | Enable last branch.\r | |
1113 | \r | |
1114 | **/\r | |
1115 | VOID\r | |
1116 | ActivateLBR (\r | |
1117 | VOID\r | |
1118 | )\r | |
1119 | {\r | |
1120 | UINT64 DebugCtl;\r | |
1121 | \r | |
1122 | DebugCtl = AsmReadMsr64 (MSR_DEBUG_CTL);\r | |
1123 | if ((DebugCtl & MSR_DEBUG_CTL_LBR) != 0) {\r | |
053e878b | 1124 | return;\r |
529a5a86 | 1125 | }\r |
053e878b | 1126 | \r |
529a5a86 MK |
1127 | DebugCtl |= MSR_DEBUG_CTL_LBR;\r |
1128 | AsmWriteMsr64 (MSR_DEBUG_CTL, DebugCtl);\r | |
1129 | }\r | |
1130 | \r | |
1131 | /**\r | |
1132 | Enable branch trace store.\r | |
1133 | \r | |
1134 | @param CpuIndex The index of the processor.\r | |
1135 | \r | |
1136 | **/\r | |
1137 | VOID\r | |
1138 | ActivateBTS (\r | |
053e878b | 1139 | IN UINTN CpuIndex\r |
529a5a86 MK |
1140 | )\r |
1141 | {\r | |
1142 | UINT64 DebugCtl;\r | |
1143 | \r | |
1144 | DebugCtl = AsmReadMsr64 (MSR_DEBUG_CTL);\r | |
1145 | if ((DebugCtl & MSR_DEBUG_CTL_BTS) != 0) {\r | |
053e878b | 1146 | return;\r |
529a5a86 MK |
1147 | }\r |
1148 | \r | |
1149 | AsmWriteMsr64 (MSR_DS_AREA, (UINT64)(UINTN)mMsrDsArea[CpuIndex]);\r | |
1150 | DebugCtl |= (UINT64)(MSR_DEBUG_CTL_BTS | MSR_DEBUG_CTL_TR);\r | |
1151 | DebugCtl &= ~((UINT64)MSR_DEBUG_CTL_BTINT);\r | |
1152 | AsmWriteMsr64 (MSR_DEBUG_CTL, DebugCtl);\r | |
1153 | }\r | |
1154 | \r | |
1155 | /**\r | |
1156 | Increase SMI number in each SMI entry.\r | |
1157 | \r | |
1158 | **/\r | |
1159 | VOID\r | |
1160 | SmmProfileRecordSmiNum (\r | |
1161 | VOID\r | |
1162 | )\r | |
1163 | {\r | |
1164 | if (mSmmProfileStart) {\r | |
1165 | mSmmProfileBase->NumSmis++;\r | |
1166 | }\r | |
1167 | }\r | |
1168 | \r | |
1169 | /**\r | |
1170 | Initialize processor environment for SMM profile.\r | |
1171 | \r | |
1172 | @param CpuIndex The index of the processor.\r | |
1173 | \r | |
1174 | **/\r | |
1175 | VOID\r | |
1176 | ActivateSmmProfile (\r | |
053e878b | 1177 | IN UINTN CpuIndex\r |
529a5a86 MK |
1178 | )\r |
1179 | {\r | |
1180 | //\r | |
1181 | // Enable Single Step DB#\r | |
1182 | //\r | |
1183 | ActivateSingleStepDB ();\r | |
1184 | \r | |
1185 | if (mBtsSupported) {\r | |
1186 | //\r | |
1187 | // We can not get useful information from LER, so we have to use BTS.\r | |
1188 | //\r | |
1189 | ActivateLBR ();\r | |
1190 | \r | |
1191 | //\r | |
1192 | // Enable BTS\r | |
1193 | //\r | |
1194 | ActivateBTS (CpuIndex);\r | |
1195 | }\r | |
1196 | }\r | |
1197 | \r | |
1198 | /**\r | |
1199 | Initialize SMM profile in SMM CPU entry point.\r | |
1200 | \r | |
1201 | @param[in] Cr3 The base address of the page tables to use in SMM.\r | |
1202 | \r | |
1203 | **/\r | |
1204 | VOID\r | |
1205 | InitSmmProfile (\r | |
1206 | UINT32 Cr3\r | |
1207 | )\r | |
1208 | {\r | |
1209 | //\r | |
1210 | // Save Cr3\r | |
1211 | //\r | |
1212 | mSmmProfileCr3 = Cr3;\r | |
1213 | \r | |
1214 | //\r | |
1215 | // Skip SMM profile initialization if feature is disabled\r | |
1216 | //\r | |
09afd9a4 JW |
1217 | if (!FeaturePcdGet (PcdCpuSmmProfileEnable) &&\r |
1218 | !HEAP_GUARD_NONSTOP_MODE &&\r | |
053e878b MK |
1219 | !NULL_DETECTION_NONSTOP_MODE)\r |
1220 | {\r | |
529a5a86 MK |
1221 | return;\r |
1222 | }\r | |
1223 | \r | |
1224 | //\r | |
1225 | // Initialize SmmProfile here\r | |
1226 | //\r | |
1227 | InitSmmProfileInternal ();\r | |
1228 | \r | |
1229 | //\r | |
1230 | // Initialize profile IDT.\r | |
1231 | //\r | |
1232 | InitIdtr ();\r | |
09afd9a4 JW |
1233 | \r |
1234 | //\r | |
1235 | // Tell #PF handler to prepare a #DB subsequently.\r | |
1236 | //\r | |
1237 | mSetupDebugTrap = TRUE;\r | |
529a5a86 MK |
1238 | }\r |
1239 | \r | |
1240 | /**\r | |
1241 | Update page table to map the memory correctly in order to make the instruction\r | |
1242 | which caused page fault execute successfully. And it also save the original page\r | |
1243 | table to be restored in single-step exception.\r | |
1244 | \r | |
1245 | @param PageTable PageTable Address.\r | |
1246 | @param PFAddress The memory address which caused page fault exception.\r | |
1247 | @param CpuIndex The index of the processor.\r | |
1248 | @param ErrorCode The Error code of exception.\r | |
1249 | \r | |
1250 | **/\r | |
1251 | VOID\r | |
1252 | RestorePageTableBelow4G (\r | |
053e878b MK |
1253 | UINT64 *PageTable,\r |
1254 | UINT64 PFAddress,\r | |
1255 | UINTN CpuIndex,\r | |
1256 | UINTN ErrorCode\r | |
529a5a86 MK |
1257 | )\r |
1258 | {\r | |
053e878b MK |
1259 | UINTN PTIndex;\r |
1260 | UINTN PFIndex;\r | |
1261 | IA32_CR4 Cr4;\r | |
1262 | BOOLEAN Enable5LevelPaging;\r | |
4eee0cc7 | 1263 | \r |
053e878b MK |
1264 | Cr4.UintN = AsmReadCr4 ();\r |
1265 | Enable5LevelPaging = (BOOLEAN)(Cr4.Bits.LA57 == 1);\r | |
4eee0cc7 RN |
1266 | \r |
1267 | //\r | |
1268 | // PML5\r | |
1269 | //\r | |
1270 | if (Enable5LevelPaging) {\r | |
1271 | PTIndex = (UINTN)BitFieldRead64 (PFAddress, 48, 56);\r | |
1272 | ASSERT (PageTable[PTIndex] != 0);\r | |
053e878b | 1273 | PageTable = (UINT64 *)(UINTN)(PageTable[PTIndex] & PHYSICAL_ADDRESS_MASK);\r |
4eee0cc7 | 1274 | }\r |
529a5a86 MK |
1275 | \r |
1276 | //\r | |
1277 | // PML4\r | |
1278 | //\r | |
053e878b | 1279 | if (sizeof (UINT64) == sizeof (UINTN)) {\r |
529a5a86 MK |
1280 | PTIndex = (UINTN)BitFieldRead64 (PFAddress, 39, 47);\r |
1281 | ASSERT (PageTable[PTIndex] != 0);\r | |
053e878b | 1282 | PageTable = (UINT64 *)(UINTN)(PageTable[PTIndex] & PHYSICAL_ADDRESS_MASK);\r |
529a5a86 MK |
1283 | }\r |
1284 | \r | |
1285 | //\r | |
1286 | // PDPTE\r | |
1287 | //\r | |
1288 | PTIndex = (UINTN)BitFieldRead64 (PFAddress, 30, 38);\r | |
1289 | ASSERT (PageTable[PTIndex] != 0);\r | |
053e878b | 1290 | PageTable = (UINT64 *)(UINTN)(PageTable[PTIndex] & PHYSICAL_ADDRESS_MASK);\r |
529a5a86 MK |
1291 | \r |
1292 | //\r | |
1293 | // PD\r | |
1294 | //\r | |
1295 | PTIndex = (UINTN)BitFieldRead64 (PFAddress, 21, 29);\r | |
1296 | if ((PageTable[PTIndex] & IA32_PG_PS) != 0) {\r | |
1297 | //\r | |
1298 | // Large page\r | |
1299 | //\r | |
1300 | \r | |
1301 | //\r | |
1302 | // Record old entries with non-present status\r | |
1303 | // Old entries include the memory which instruction is at and the memory which instruction access.\r | |
1304 | //\r | |
1305 | //\r | |
1306 | ASSERT (mPFEntryCount[CpuIndex] < MAX_PF_ENTRY_COUNT);\r | |
1307 | if (mPFEntryCount[CpuIndex] < MAX_PF_ENTRY_COUNT) {\r | |
053e878b | 1308 | PFIndex = mPFEntryCount[CpuIndex];\r |
529a5a86 MK |
1309 | mLastPFEntryValue[CpuIndex][PFIndex] = PageTable[PTIndex];\r |
1310 | mLastPFEntryPointer[CpuIndex][PFIndex] = &PageTable[PTIndex];\r | |
1311 | mPFEntryCount[CpuIndex]++;\r | |
1312 | }\r | |
1313 | \r | |
1314 | //\r | |
1315 | // Set new entry\r | |
1316 | //\r | |
053e878b | 1317 | PageTable[PTIndex] = (PFAddress & ~((1ull << 21) - 1));\r |
529a5a86 | 1318 | PageTable[PTIndex] |= (UINT64)IA32_PG_PS;\r |
881520ea | 1319 | PageTable[PTIndex] |= (UINT64)PAGE_ATTRIBUTE_BITS;\r |
529a5a86 MK |
1320 | if ((ErrorCode & IA32_PF_EC_ID) != 0) {\r |
1321 | PageTable[PTIndex] &= ~IA32_PG_NX;\r | |
1322 | }\r | |
1323 | } else {\r | |
1324 | //\r | |
1325 | // Small page\r | |
1326 | //\r | |
1327 | ASSERT (PageTable[PTIndex] != 0);\r | |
053e878b | 1328 | PageTable = (UINT64 *)(UINTN)(PageTable[PTIndex] & PHYSICAL_ADDRESS_MASK);\r |
529a5a86 MK |
1329 | \r |
1330 | //\r | |
1331 | // 4K PTE\r | |
1332 | //\r | |
1333 | PTIndex = (UINTN)BitFieldRead64 (PFAddress, 12, 20);\r | |
1334 | \r | |
1335 | //\r | |
1336 | // Record old entries with non-present status\r | |
1337 | // Old entries include the memory which instruction is at and the memory which instruction access.\r | |
1338 | //\r | |
1339 | //\r | |
1340 | ASSERT (mPFEntryCount[CpuIndex] < MAX_PF_ENTRY_COUNT);\r | |
1341 | if (mPFEntryCount[CpuIndex] < MAX_PF_ENTRY_COUNT) {\r | |
053e878b | 1342 | PFIndex = mPFEntryCount[CpuIndex];\r |
529a5a86 MK |
1343 | mLastPFEntryValue[CpuIndex][PFIndex] = PageTable[PTIndex];\r |
1344 | mLastPFEntryPointer[CpuIndex][PFIndex] = &PageTable[PTIndex];\r | |
1345 | mPFEntryCount[CpuIndex]++;\r | |
1346 | }\r | |
1347 | \r | |
1348 | //\r | |
1349 | // Set new entry\r | |
1350 | //\r | |
053e878b | 1351 | PageTable[PTIndex] = (PFAddress & ~((1ull << 12) - 1));\r |
881520ea | 1352 | PageTable[PTIndex] |= (UINT64)PAGE_ATTRIBUTE_BITS;\r |
529a5a86 MK |
1353 | if ((ErrorCode & IA32_PF_EC_ID) != 0) {\r |
1354 | PageTable[PTIndex] &= ~IA32_PG_NX;\r | |
1355 | }\r | |
1356 | }\r | |
1357 | }\r | |
1358 | \r | |
09afd9a4 JW |
1359 | /**\r |
1360 | Handler for Page Fault triggered by Guard page.\r | |
1361 | \r | |
1362 | @param ErrorCode The Error code of exception.\r | |
1363 | \r | |
1364 | **/\r | |
1365 | VOID\r | |
1366 | GuardPagePFHandler (\r | |
053e878b | 1367 | UINTN ErrorCode\r |
09afd9a4 JW |
1368 | )\r |
1369 | {\r | |
053e878b MK |
1370 | UINT64 *PageTable;\r |
1371 | UINT64 PFAddress;\r | |
1372 | UINT64 RestoreAddress;\r | |
1373 | UINTN RestorePageNumber;\r | |
1374 | UINTN CpuIndex;\r | |
09afd9a4 | 1375 | \r |
053e878b MK |
1376 | PageTable = (UINT64 *)AsmReadCr3 ();\r |
1377 | PFAddress = AsmReadCr2 ();\r | |
1378 | CpuIndex = GetCpuIndex ();\r | |
09afd9a4 JW |
1379 | \r |
1380 | //\r | |
1381 | // Memory operation cross pages, like "rep mov" instruction, will cause\r | |
1382 | // infinite loop between this and Debug Trap handler. We have to make sure\r | |
1383 | // that current page and the page followed are both in PRESENT state.\r | |
1384 | //\r | |
1385 | RestorePageNumber = 2;\r | |
053e878b | 1386 | RestoreAddress = PFAddress;\r |
09afd9a4 JW |
1387 | while (RestorePageNumber > 0) {\r |
1388 | RestorePageTableBelow4G (PageTable, RestoreAddress, CpuIndex, ErrorCode);\r | |
1389 | RestoreAddress += EFI_PAGE_SIZE;\r | |
1390 | RestorePageNumber--;\r | |
1391 | }\r | |
1392 | \r | |
1393 | //\r | |
1394 | // Flush TLB\r | |
1395 | //\r | |
1396 | CpuFlushTlb ();\r | |
1397 | }\r | |
1398 | \r | |
529a5a86 MK |
1399 | /**\r |
1400 | The Page fault handler to save SMM profile data.\r | |
1401 | \r | |
1402 | @param Rip The RIP when exception happens.\r | |
1403 | @param ErrorCode The Error code of exception.\r | |
1404 | \r | |
1405 | **/\r | |
1406 | VOID\r | |
1407 | SmmProfilePFHandler (\r | |
053e878b MK |
1408 | UINTN Rip,\r |
1409 | UINTN ErrorCode\r | |
529a5a86 MK |
1410 | )\r |
1411 | {\r | |
053e878b MK |
1412 | UINT64 *PageTable;\r |
1413 | UINT64 PFAddress;\r | |
1414 | UINT64 RestoreAddress;\r | |
1415 | UINTN RestorePageNumber;\r | |
1416 | UINTN CpuIndex;\r | |
1417 | UINTN Index;\r | |
1418 | UINT64 InstructionAddress;\r | |
1419 | UINTN MaxEntryNumber;\r | |
1420 | UINTN CurrentEntryNumber;\r | |
1421 | BOOLEAN IsValidPFAddress;\r | |
1422 | SMM_PROFILE_ENTRY *SmmProfileEntry;\r | |
1423 | UINT64 SmiCommand;\r | |
1424 | EFI_STATUS Status;\r | |
1425 | UINT8 SoftSmiValue;\r | |
1426 | EFI_SMM_SAVE_STATE_IO_INFO IoInfo;\r | |
529a5a86 MK |
1427 | \r |
1428 | if (!mSmmProfileStart) {\r | |
1429 | //\r | |
1430 | // If SMM profile does not start, call original page fault handler.\r | |
1431 | //\r | |
1432 | SmiDefaultPFHandler ();\r | |
1433 | return;\r | |
1434 | }\r | |
1435 | \r | |
1436 | if (mBtsSupported) {\r | |
1437 | DisableBTS ();\r | |
1438 | }\r | |
1439 | \r | |
053e878b MK |
1440 | IsValidPFAddress = FALSE;\r |
1441 | PageTable = (UINT64 *)AsmReadCr3 ();\r | |
1442 | PFAddress = AsmReadCr2 ();\r | |
1443 | CpuIndex = GetCpuIndex ();\r | |
529a5a86 | 1444 | \r |
890d9ee5 JW |
1445 | //\r |
1446 | // Memory operation cross pages, like "rep mov" instruction, will cause\r | |
1447 | // infinite loop between this and Debug Trap handler. We have to make sure\r | |
1448 | // that current page and the page followed are both in PRESENT state.\r | |
1449 | //\r | |
1450 | RestorePageNumber = 2;\r | |
053e878b | 1451 | RestoreAddress = PFAddress;\r |
890d9ee5 JW |
1452 | while (RestorePageNumber > 0) {\r |
1453 | if (RestoreAddress <= 0xFFFFFFFF) {\r | |
1454 | RestorePageTableBelow4G (PageTable, RestoreAddress, CpuIndex, ErrorCode);\r | |
1455 | } else {\r | |
1456 | RestorePageTableAbove4G (PageTable, RestoreAddress, CpuIndex, ErrorCode, &IsValidPFAddress);\r | |
1457 | }\r | |
053e878b | 1458 | \r |
890d9ee5 JW |
1459 | RestoreAddress += EFI_PAGE_SIZE;\r |
1460 | RestorePageNumber--;\r | |
529a5a86 MK |
1461 | }\r |
1462 | \r | |
1463 | if (!IsValidPFAddress) {\r | |
1464 | InstructionAddress = Rip;\r | |
053e878b | 1465 | if (((ErrorCode & IA32_PF_EC_ID) != 0) && (mBtsSupported)) {\r |
529a5a86 MK |
1466 | //\r |
1467 | // If it is instruction fetch failure, get the correct IP from BTS.\r | |
1468 | //\r | |
1469 | InstructionAddress = GetSourceFromDestinationOnBts (CpuIndex, Rip);\r | |
1470 | if (InstructionAddress == 0) {\r | |
1471 | //\r | |
1472 | // It indicates the instruction which caused page fault is not a jump instruction,\r | |
1473 | // set instruction address same as the page fault address.\r | |
1474 | //\r | |
1475 | InstructionAddress = PFAddress;\r | |
1476 | }\r | |
1477 | }\r | |
1478 | \r | |
529a5a86 MK |
1479 | //\r |
1480 | // Indicate it is not software SMI\r | |
1481 | //\r | |
053e878b | 1482 | SmiCommand = 0xFFFFFFFFFFFFFFFFULL;\r |
529a5a86 | 1483 | for (Index = 0; Index < gSmst->NumberOfCpus; Index++) {\r |
053e878b | 1484 | Status = SmmReadSaveState (&mSmmCpu, sizeof (IoInfo), EFI_SMM_SAVE_STATE_REGISTER_IO, Index, &IoInfo);\r |
529a5a86 MK |
1485 | if (EFI_ERROR (Status)) {\r |
1486 | continue;\r | |
1487 | }\r | |
053e878b | 1488 | \r |
529a5a86 | 1489 | if (IoInfo.IoPort == mSmiCommandPort) {\r |
529a5a86 MK |
1490 | //\r |
1491 | // A software SMI triggered by SMI command port has been found, get SmiCommand from SMI command port.\r | |
1492 | //\r | |
1493 | SoftSmiValue = IoRead8 (mSmiCommandPort);\r | |
053e878b | 1494 | SmiCommand = (UINT64)SoftSmiValue;\r |
529a5a86 MK |
1495 | break;\r |
1496 | }\r | |
1497 | }\r | |
1498 | \r | |
1499 | SmmProfileEntry = (SMM_PROFILE_ENTRY *)(UINTN)(mSmmProfileBase + 1);\r | |
1500 | //\r | |
1501 | // Check if there is already a same entry in profile data.\r | |
1502 | //\r | |
053e878b | 1503 | for (Index = 0; Index < (UINTN)mSmmProfileBase->CurDataEntries; Index++) {\r |
529a5a86 MK |
1504 | if ((SmmProfileEntry[Index].ErrorCode == (UINT64)ErrorCode) &&\r |
1505 | (SmmProfileEntry[Index].Address == PFAddress) &&\r | |
1506 | (SmmProfileEntry[Index].CpuNum == (UINT64)CpuIndex) &&\r | |
1507 | (SmmProfileEntry[Index].Instruction == InstructionAddress) &&\r | |
053e878b MK |
1508 | (SmmProfileEntry[Index].SmiCmd == SmiCommand))\r |
1509 | {\r | |
529a5a86 MK |
1510 | //\r |
1511 | // Same record exist, need not save again.\r | |
1512 | //\r | |
1513 | break;\r | |
1514 | }\r | |
1515 | }\r | |
053e878b | 1516 | \r |
529a5a86 | 1517 | if (Index == mSmmProfileBase->CurDataEntries) {\r |
053e878b MK |
1518 | CurrentEntryNumber = (UINTN)mSmmProfileBase->CurDataEntries;\r |
1519 | MaxEntryNumber = (UINTN)mSmmProfileBase->MaxDataEntries;\r | |
529a5a86 MK |
1520 | if (FeaturePcdGet (PcdCpuSmmProfileRingBuffer)) {\r |
1521 | CurrentEntryNumber = CurrentEntryNumber % MaxEntryNumber;\r | |
1522 | }\r | |
053e878b | 1523 | \r |
529a5a86 MK |
1524 | if (CurrentEntryNumber < MaxEntryNumber) {\r |
1525 | //\r | |
1526 | // Log the new entry\r | |
1527 | //\r | |
1528 | SmmProfileEntry[CurrentEntryNumber].SmiNum = mSmmProfileBase->NumSmis;\r | |
1529 | SmmProfileEntry[CurrentEntryNumber].ErrorCode = (UINT64)ErrorCode;\r | |
1530 | SmmProfileEntry[CurrentEntryNumber].ApicId = (UINT64)GetApicId ();\r | |
1531 | SmmProfileEntry[CurrentEntryNumber].CpuNum = (UINT64)CpuIndex;\r | |
1532 | SmmProfileEntry[CurrentEntryNumber].Address = PFAddress;\r | |
1533 | SmmProfileEntry[CurrentEntryNumber].Instruction = InstructionAddress;\r | |
1534 | SmmProfileEntry[CurrentEntryNumber].SmiCmd = SmiCommand;\r | |
1535 | //\r | |
1536 | // Update current entry index and data size in the header.\r | |
1537 | //\r | |
1538 | mSmmProfileBase->CurDataEntries++;\r | |
1539 | mSmmProfileBase->CurDataSize = MultU64x64 (mSmmProfileBase->CurDataEntries, sizeof (SMM_PROFILE_ENTRY));\r | |
1540 | }\r | |
1541 | }\r | |
1542 | }\r | |
053e878b | 1543 | \r |
529a5a86 MK |
1544 | //\r |
1545 | // Flush TLB\r | |
1546 | //\r | |
1547 | CpuFlushTlb ();\r | |
1548 | \r | |
1549 | if (mBtsSupported) {\r | |
1550 | EnableBTS ();\r | |
1551 | }\r | |
1552 | }\r | |
1553 | \r | |
1554 | /**\r | |
1555 | Replace INT1 exception handler to restore page table to absent/execute-disable state\r | |
1556 | in order to trigger page fault again to save SMM profile data..\r | |
1557 | \r | |
1558 | **/\r | |
1559 | VOID\r | |
1560 | InitIdtr (\r | |
1561 | VOID\r | |
1562 | )\r | |
1563 | {\r | |
053e878b | 1564 | EFI_STATUS Status;\r |
5c88af79 JF |
1565 | \r |
1566 | Status = SmmRegisterExceptionHandler (&mSmmCpuService, EXCEPT_IA32_DEBUG, DebugExceptionHandler);\r | |
1567 | ASSERT_EFI_ERROR (Status);\r | |
529a5a86 | 1568 | }\r |