UefiCpuPkg/PiSmmCpuDxeSmm: Fix memory protection crash
[mirror_edk2.git] / UefiCpuPkg / PiSmmCpuDxeSmm / SmmCpuMemoryManagement.c
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1/** @file\r
2\r
714c2603 3Copyright (c) 2016 - 2017, Intel Corporation. All rights reserved.<BR>\r
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4This program and the accompanying materials\r
5are licensed and made available under the terms and conditions of the BSD License\r
6which accompanies this distribution. The full text of the license may be found at\r
7http://opensource.org/licenses/bsd-license.php\r
8\r
9THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
10WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
11\r
12**/\r
13\r
14#include "PiSmmCpuDxeSmm.h"\r
15\r
16#define NEXT_MEMORY_DESCRIPTOR(MemoryDescriptor, Size) \\r
17 ((EFI_MEMORY_DESCRIPTOR *)((UINT8 *)(MemoryDescriptor) + (Size)))\r
18\r
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19#define PREVIOUS_MEMORY_DESCRIPTOR(MemoryDescriptor, Size) \\r
20 ((EFI_MEMORY_DESCRIPTOR *)((UINT8 *)(MemoryDescriptor) - (Size)))\r
21\r
22EFI_MEMORY_DESCRIPTOR *mUefiMemoryMap;\r
23UINTN mUefiMemoryMapSize;\r
24UINTN mUefiDescriptorSize;\r
25\r
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26PAGE_ATTRIBUTE_TABLE mPageAttributeTable[] = {\r
27 {Page4K, SIZE_4KB, PAGING_4K_ADDRESS_MASK_64},\r
28 {Page2M, SIZE_2MB, PAGING_2M_ADDRESS_MASK_64},\r
29 {Page1G, SIZE_1GB, PAGING_1G_ADDRESS_MASK_64},\r
30};\r
31\r
32/**\r
33 Return page table base.\r
34\r
35 @return page table base.\r
36**/\r
37UINTN\r
38GetPageTableBase (\r
39 VOID\r
40 )\r
41{\r
42 return (AsmReadCr3 () & PAGING_4K_ADDRESS_MASK_64);\r
43}\r
44\r
45/**\r
46 Return length according to page attributes.\r
47\r
48 @param[in] PageAttributes The page attribute of the page entry.\r
49\r
50 @return The length of page entry.\r
51**/\r
52UINTN\r
53PageAttributeToLength (\r
54 IN PAGE_ATTRIBUTE PageAttribute\r
55 )\r
56{\r
57 UINTN Index;\r
58 for (Index = 0; Index < sizeof(mPageAttributeTable)/sizeof(mPageAttributeTable[0]); Index++) {\r
59 if (PageAttribute == mPageAttributeTable[Index].Attribute) {\r
60 return (UINTN)mPageAttributeTable[Index].Length;\r
61 }\r
62 }\r
63 return 0;\r
64}\r
65\r
66/**\r
67 Return address mask according to page attributes.\r
68\r
69 @param[in] PageAttributes The page attribute of the page entry.\r
70\r
71 @return The address mask of page entry.\r
72**/\r
73UINTN\r
74PageAttributeToMask (\r
75 IN PAGE_ATTRIBUTE PageAttribute\r
76 )\r
77{\r
78 UINTN Index;\r
79 for (Index = 0; Index < sizeof(mPageAttributeTable)/sizeof(mPageAttributeTable[0]); Index++) {\r
80 if (PageAttribute == mPageAttributeTable[Index].Attribute) {\r
81 return (UINTN)mPageAttributeTable[Index].AddressMask;\r
82 }\r
83 }\r
84 return 0;\r
85}\r
86\r
87/**\r
88 Return page table entry to match the address.\r
89\r
90 @param[in] Address The address to be checked.\r
91 @param[out] PageAttributes The page attribute of the page entry.\r
92\r
93 @return The page entry.\r
94**/\r
95VOID *\r
96GetPageTableEntry (\r
97 IN PHYSICAL_ADDRESS Address,\r
98 OUT PAGE_ATTRIBUTE *PageAttribute\r
99 )\r
100{\r
101 UINTN Index1;\r
102 UINTN Index2;\r
103 UINTN Index3;\r
104 UINTN Index4;\r
105 UINT64 *L1PageTable;\r
106 UINT64 *L2PageTable;\r
107 UINT64 *L3PageTable;\r
108 UINT64 *L4PageTable;\r
109\r
110 Index4 = ((UINTN)RShiftU64 (Address, 39)) & PAGING_PAE_INDEX_MASK;\r
111 Index3 = ((UINTN)Address >> 30) & PAGING_PAE_INDEX_MASK;\r
112 Index2 = ((UINTN)Address >> 21) & PAGING_PAE_INDEX_MASK;\r
113 Index1 = ((UINTN)Address >> 12) & PAGING_PAE_INDEX_MASK;\r
114\r
115 if (sizeof(UINTN) == sizeof(UINT64)) {\r
116 L4PageTable = (UINT64 *)GetPageTableBase ();\r
117 if (L4PageTable[Index4] == 0) {\r
118 *PageAttribute = PageNone;\r
119 return NULL;\r
120 }\r
121\r
241f9149 122 L3PageTable = (UINT64 *)(UINTN)(L4PageTable[Index4] & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64);\r
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123 } else {\r
124 L3PageTable = (UINT64 *)GetPageTableBase ();\r
125 }\r
126 if (L3PageTable[Index3] == 0) {\r
127 *PageAttribute = PageNone;\r
128 return NULL;\r
129 }\r
130 if ((L3PageTable[Index3] & IA32_PG_PS) != 0) {\r
131 // 1G\r
132 *PageAttribute = Page1G;\r
133 return &L3PageTable[Index3];\r
134 }\r
135\r
241f9149 136 L2PageTable = (UINT64 *)(UINTN)(L3PageTable[Index3] & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64);\r
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137 if (L2PageTable[Index2] == 0) {\r
138 *PageAttribute = PageNone;\r
139 return NULL;\r
140 }\r
141 if ((L2PageTable[Index2] & IA32_PG_PS) != 0) {\r
142 // 2M\r
143 *PageAttribute = Page2M;\r
144 return &L2PageTable[Index2];\r
145 }\r
146\r
147 // 4k\r
241f9149 148 L1PageTable = (UINT64 *)(UINTN)(L2PageTable[Index2] & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64);\r
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149 if ((L1PageTable[Index1] == 0) && (Address != 0)) {\r
150 *PageAttribute = PageNone;\r
151 return NULL;\r
152 }\r
153 *PageAttribute = Page4K;\r
154 return &L1PageTable[Index1];\r
155}\r
156\r
157/**\r
158 Return memory attributes of page entry.\r
159\r
160 @param[in] PageEntry The page entry.\r
161\r
162 @return Memory attributes of page entry.\r
163**/\r
164UINT64\r
165GetAttributesFromPageEntry (\r
166 IN UINT64 *PageEntry\r
167 )\r
168{\r
169 UINT64 Attributes;\r
170 Attributes = 0;\r
171 if ((*PageEntry & IA32_PG_P) == 0) {\r
172 Attributes |= EFI_MEMORY_RP;\r
173 }\r
174 if ((*PageEntry & IA32_PG_RW) == 0) {\r
175 Attributes |= EFI_MEMORY_RO;\r
176 }\r
177 if ((*PageEntry & IA32_PG_NX) != 0) {\r
178 Attributes |= EFI_MEMORY_XP;\r
179 }\r
180 return Attributes;\r
181}\r
182\r
183/**\r
184 Modify memory attributes of page entry.\r
185\r
186 @param[in] PageEntry The page entry.\r
187 @param[in] Attributes The bit mask of attributes to modify for the memory region.\r
188 @param[in] IsSet TRUE means to set attributes. FALSE means to clear attributes.\r
189 @param[out] IsModified TRUE means page table modified. FALSE means page table not modified.\r
190**/\r
191VOID\r
192ConvertPageEntryAttribute (\r
193 IN UINT64 *PageEntry,\r
194 IN UINT64 Attributes,\r
195 IN BOOLEAN IsSet,\r
196 OUT BOOLEAN *IsModified\r
197 )\r
198{\r
199 UINT64 CurrentPageEntry;\r
200 UINT64 NewPageEntry;\r
201\r
202 CurrentPageEntry = *PageEntry;\r
203 NewPageEntry = CurrentPageEntry;\r
204 if ((Attributes & EFI_MEMORY_RP) != 0) {\r
205 if (IsSet) {\r
206 NewPageEntry &= ~(UINT64)IA32_PG_P;\r
207 } else {\r
208 NewPageEntry |= IA32_PG_P;\r
209 }\r
210 }\r
211 if ((Attributes & EFI_MEMORY_RO) != 0) {\r
212 if (IsSet) {\r
213 NewPageEntry &= ~(UINT64)IA32_PG_RW;\r
214 } else {\r
215 NewPageEntry |= IA32_PG_RW;\r
216 }\r
217 }\r
218 if ((Attributes & EFI_MEMORY_XP) != 0) {\r
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219 if (mXdSupported) {\r
220 if (IsSet) {\r
221 NewPageEntry |= IA32_PG_NX;\r
222 } else {\r
223 NewPageEntry &= ~IA32_PG_NX;\r
224 }\r
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225 }\r
226 }\r
227 *PageEntry = NewPageEntry;\r
228 if (CurrentPageEntry != NewPageEntry) {\r
229 *IsModified = TRUE;\r
230 DEBUG ((DEBUG_VERBOSE, "ConvertPageEntryAttribute 0x%lx", CurrentPageEntry));\r
231 DEBUG ((DEBUG_VERBOSE, "->0x%lx\n", NewPageEntry));\r
232 } else {\r
233 *IsModified = FALSE;\r
234 }\r
235}\r
236\r
237/**\r
238 This function returns if there is need to split page entry.\r
239\r
240 @param[in] BaseAddress The base address to be checked.\r
241 @param[in] Length The length to be checked.\r
242 @param[in] PageEntry The page entry to be checked.\r
243 @param[in] PageAttribute The page attribute of the page entry.\r
244\r
245 @retval SplitAttributes on if there is need to split page entry.\r
246**/\r
247PAGE_ATTRIBUTE\r
248NeedSplitPage (\r
249 IN PHYSICAL_ADDRESS BaseAddress,\r
250 IN UINT64 Length,\r
251 IN UINT64 *PageEntry,\r
252 IN PAGE_ATTRIBUTE PageAttribute\r
253 )\r
254{\r
255 UINT64 PageEntryLength;\r
256\r
257 PageEntryLength = PageAttributeToLength (PageAttribute);\r
258\r
259 if (((BaseAddress & (PageEntryLength - 1)) == 0) && (Length >= PageEntryLength)) {\r
260 return PageNone;\r
261 }\r
262\r
263 if (((BaseAddress & PAGING_2M_MASK) != 0) || (Length < SIZE_2MB)) {\r
264 return Page4K;\r
265 }\r
266\r
267 return Page2M;\r
268}\r
269\r
270/**\r
271 This function splits one page entry to small page entries.\r
272\r
273 @param[in] PageEntry The page entry to be splitted.\r
274 @param[in] PageAttribute The page attribute of the page entry.\r
275 @param[in] SplitAttribute How to split the page entry.\r
276\r
277 @retval RETURN_SUCCESS The page entry is splitted.\r
278 @retval RETURN_UNSUPPORTED The page entry does not support to be splitted.\r
279 @retval RETURN_OUT_OF_RESOURCES No resource to split page entry.\r
280**/\r
281RETURN_STATUS\r
282SplitPage (\r
283 IN UINT64 *PageEntry,\r
284 IN PAGE_ATTRIBUTE PageAttribute,\r
285 IN PAGE_ATTRIBUTE SplitAttribute\r
286 )\r
287{\r
288 UINT64 BaseAddress;\r
289 UINT64 *NewPageEntry;\r
290 UINTN Index;\r
291\r
292 ASSERT (PageAttribute == Page2M || PageAttribute == Page1G);\r
293\r
294 if (PageAttribute == Page2M) {\r
295 //\r
296 // Split 2M to 4K\r
297 //\r
298 ASSERT (SplitAttribute == Page4K);\r
299 if (SplitAttribute == Page4K) {\r
300 NewPageEntry = AllocatePageTableMemory (1);\r
301 DEBUG ((DEBUG_VERBOSE, "Split - 0x%x\n", NewPageEntry));\r
302 if (NewPageEntry == NULL) {\r
303 return RETURN_OUT_OF_RESOURCES;\r
304 }\r
305 BaseAddress = *PageEntry & PAGING_2M_ADDRESS_MASK_64;\r
306 for (Index = 0; Index < SIZE_4KB / sizeof(UINT64); Index++) {\r
241f9149 307 NewPageEntry[Index] = (BaseAddress + SIZE_4KB * Index) | mAddressEncMask | ((*PageEntry) & PAGE_PROGATE_BITS);\r
717fb604 308 }\r
241f9149 309 (*PageEntry) = (UINT64)(UINTN)NewPageEntry | mAddressEncMask | PAGE_ATTRIBUTE_BITS;\r
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310 return RETURN_SUCCESS;\r
311 } else {\r
312 return RETURN_UNSUPPORTED;\r
313 }\r
314 } else if (PageAttribute == Page1G) {\r
315 //\r
316 // Split 1G to 2M\r
317 // No need support 1G->4K directly, we should use 1G->2M, then 2M->4K to get more compact page table.\r
318 //\r
319 ASSERT (SplitAttribute == Page2M || SplitAttribute == Page4K);\r
320 if ((SplitAttribute == Page2M || SplitAttribute == Page4K)) {\r
321 NewPageEntry = AllocatePageTableMemory (1);\r
322 DEBUG ((DEBUG_VERBOSE, "Split - 0x%x\n", NewPageEntry));\r
323 if (NewPageEntry == NULL) {\r
324 return RETURN_OUT_OF_RESOURCES;\r
325 }\r
326 BaseAddress = *PageEntry & PAGING_1G_ADDRESS_MASK_64;\r
327 for (Index = 0; Index < SIZE_4KB / sizeof(UINT64); Index++) {\r
241f9149 328 NewPageEntry[Index] = (BaseAddress + SIZE_2MB * Index) | mAddressEncMask | IA32_PG_PS | ((*PageEntry) & PAGE_PROGATE_BITS);\r
717fb604 329 }\r
241f9149 330 (*PageEntry) = (UINT64)(UINTN)NewPageEntry | mAddressEncMask | PAGE_ATTRIBUTE_BITS;\r
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331 return RETURN_SUCCESS;\r
332 } else {\r
333 return RETURN_UNSUPPORTED;\r
334 }\r
335 } else {\r
336 return RETURN_UNSUPPORTED;\r
337 }\r
338}\r
339\r
340/**\r
341 This function modifies the page attributes for the memory region specified by BaseAddress and\r
342 Length from their current attributes to the attributes specified by Attributes.\r
343\r
344 Caller should make sure BaseAddress and Length is at page boundary.\r
345\r
346 @param[in] BaseAddress The physical address that is the start address of a memory region.\r
347 @param[in] Length The size in bytes of the memory region.\r
348 @param[in] Attributes The bit mask of attributes to modify for the memory region.\r
349 @param[in] IsSet TRUE means to set attributes. FALSE means to clear attributes.\r
350 @param[out] IsSplitted TRUE means page table splitted. FALSE means page table not splitted.\r
351 @param[out] IsModified TRUE means page table modified. FALSE means page table not modified.\r
352\r
353 @retval RETURN_SUCCESS The attributes were modified for the memory region.\r
354 @retval RETURN_ACCESS_DENIED The attributes for the memory resource range specified by\r
355 BaseAddress and Length cannot be modified.\r
356 @retval RETURN_INVALID_PARAMETER Length is zero.\r
357 Attributes specified an illegal combination of attributes that\r
358 cannot be set together.\r
359 @retval RETURN_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of\r
360 the memory resource range.\r
361 @retval RETURN_UNSUPPORTED The processor does not support one or more bytes of the memory\r
362 resource range specified by BaseAddress and Length.\r
363 The bit mask of attributes is not support for the memory resource\r
364 range specified by BaseAddress and Length.\r
365**/\r
366RETURN_STATUS\r
367EFIAPI\r
368ConvertMemoryPageAttributes (\r
369 IN PHYSICAL_ADDRESS BaseAddress,\r
370 IN UINT64 Length,\r
371 IN UINT64 Attributes,\r
372 IN BOOLEAN IsSet,\r
373 OUT BOOLEAN *IsSplitted, OPTIONAL\r
374 OUT BOOLEAN *IsModified OPTIONAL\r
375 )\r
376{\r
377 UINT64 *PageEntry;\r
378 PAGE_ATTRIBUTE PageAttribute;\r
379 UINTN PageEntryLength;\r
380 PAGE_ATTRIBUTE SplitAttribute;\r
381 RETURN_STATUS Status;\r
382 BOOLEAN IsEntryModified;\r
714c2603 383 EFI_PHYSICAL_ADDRESS MaximumSupportMemAddress;\r
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384\r
385 ASSERT (Attributes != 0);\r
386 ASSERT ((Attributes & ~(EFI_MEMORY_RP | EFI_MEMORY_RO | EFI_MEMORY_XP)) == 0);\r
387\r
388 ASSERT ((BaseAddress & (SIZE_4KB - 1)) == 0);\r
389 ASSERT ((Length & (SIZE_4KB - 1)) == 0);\r
390\r
391 if (Length == 0) {\r
392 return RETURN_INVALID_PARAMETER;\r
393 }\r
394\r
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395 MaximumSupportMemAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)(LShiftU64 (1, mPhysicalAddressBits) - 1);\r
396 if (BaseAddress > MaximumSupportMemAddress) {\r
397 return RETURN_UNSUPPORTED;\r
398 }\r
399 if (Length > MaximumSupportMemAddress) {\r
400 return RETURN_UNSUPPORTED;\r
401 }\r
402 if ((Length != 0) && (BaseAddress > MaximumSupportMemAddress - (Length - 1))) {\r
403 return RETURN_UNSUPPORTED;\r
404 }\r
405\r
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406// DEBUG ((DEBUG_ERROR, "ConvertMemoryPageAttributes(%x) - %016lx, %016lx, %02lx\n", IsSet, BaseAddress, Length, Attributes));\r
407\r
408 if (IsSplitted != NULL) {\r
409 *IsSplitted = FALSE;\r
410 }\r
411 if (IsModified != NULL) {\r
412 *IsModified = FALSE;\r
413 }\r
414\r
415 //\r
416 // Below logic is to check 2M/4K page to make sure we donot waist memory.\r
417 //\r
418 while (Length != 0) {\r
419 PageEntry = GetPageTableEntry (BaseAddress, &PageAttribute);\r
420 if (PageEntry == NULL) {\r
421 return RETURN_UNSUPPORTED;\r
422 }\r
423 PageEntryLength = PageAttributeToLength (PageAttribute);\r
424 SplitAttribute = NeedSplitPage (BaseAddress, Length, PageEntry, PageAttribute);\r
425 if (SplitAttribute == PageNone) {\r
426 ConvertPageEntryAttribute (PageEntry, Attributes, IsSet, &IsEntryModified);\r
427 if (IsEntryModified) {\r
428 if (IsModified != NULL) {\r
429 *IsModified = TRUE;\r
430 }\r
431 }\r
432 //\r
433 // Convert success, move to next\r
434 //\r
435 BaseAddress += PageEntryLength;\r
436 Length -= PageEntryLength;\r
437 } else {\r
438 Status = SplitPage (PageEntry, PageAttribute, SplitAttribute);\r
439 if (RETURN_ERROR (Status)) {\r
440 return RETURN_UNSUPPORTED;\r
441 }\r
442 if (IsSplitted != NULL) {\r
443 *IsSplitted = TRUE;\r
444 }\r
445 if (IsModified != NULL) {\r
446 *IsModified = TRUE;\r
447 }\r
448 //\r
449 // Just split current page\r
450 // Convert success in next around\r
451 //\r
452 }\r
453 }\r
454\r
455 return RETURN_SUCCESS;\r
456}\r
457\r
458/**\r
459 FlushTlb on current processor.\r
460\r
461 @param[in,out] Buffer Pointer to private data buffer.\r
462**/\r
463VOID\r
464EFIAPI\r
465FlushTlbOnCurrentProcessor (\r
466 IN OUT VOID *Buffer\r
467 )\r
468{\r
469 CpuFlushTlb ();\r
470}\r
471\r
472/**\r
473 FlushTlb for all processors.\r
474**/\r
475VOID\r
476FlushTlbForAll (\r
477 VOID\r
478 )\r
479{\r
480 UINTN Index;\r
481\r
482 FlushTlbOnCurrentProcessor (NULL);\r
483\r
484 for (Index = 0; Index < gSmst->NumberOfCpus; Index++) {\r
485 if (Index != gSmst->CurrentlyExecutingCpu) {\r
486 // Force to start up AP in blocking mode,\r
487 SmmBlockingStartupThisAp (FlushTlbOnCurrentProcessor, Index, NULL);\r
488 // Do not check return status, because AP might not be present in some corner cases.\r
489 }\r
490 }\r
491}\r
492\r
493/**\r
494 This function sets the attributes for the memory region specified by BaseAddress and\r
495 Length from their current attributes to the attributes specified by Attributes.\r
496\r
497 @param[in] BaseAddress The physical address that is the start address of a memory region.\r
498 @param[in] Length The size in bytes of the memory region.\r
499 @param[in] Attributes The bit mask of attributes to set for the memory region.\r
500 @param[out] IsSplitted TRUE means page table splitted. FALSE means page table not splitted.\r
501\r
502 @retval EFI_SUCCESS The attributes were set for the memory region.\r
503 @retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by\r
504 BaseAddress and Length cannot be modified.\r
505 @retval EFI_INVALID_PARAMETER Length is zero.\r
506 Attributes specified an illegal combination of attributes that\r
507 cannot be set together.\r
508 @retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of\r
509 the memory resource range.\r
510 @retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory\r
511 resource range specified by BaseAddress and Length.\r
512 The bit mask of attributes is not support for the memory resource\r
513 range specified by BaseAddress and Length.\r
514\r
515**/\r
516EFI_STATUS\r
517EFIAPI\r
518SmmSetMemoryAttributesEx (\r
519 IN EFI_PHYSICAL_ADDRESS BaseAddress,\r
520 IN UINT64 Length,\r
521 IN UINT64 Attributes,\r
522 OUT BOOLEAN *IsSplitted OPTIONAL\r
523 )\r
524{\r
525 EFI_STATUS Status;\r
526 BOOLEAN IsModified;\r
527\r
528 Status = ConvertMemoryPageAttributes (BaseAddress, Length, Attributes, TRUE, IsSplitted, &IsModified);\r
529 if (!EFI_ERROR(Status)) {\r
530 if (IsModified) {\r
531 //\r
532 // Flush TLB as last step\r
533 //\r
534 FlushTlbForAll();\r
535 }\r
536 }\r
537\r
538 return Status;\r
539}\r
540\r
541/**\r
542 This function clears the attributes for the memory region specified by BaseAddress and\r
543 Length from their current attributes to the attributes specified by Attributes.\r
544\r
545 @param[in] BaseAddress The physical address that is the start address of a memory region.\r
546 @param[in] Length The size in bytes of the memory region.\r
547 @param[in] Attributes The bit mask of attributes to clear for the memory region.\r
548 @param[out] IsSplitted TRUE means page table splitted. FALSE means page table not splitted.\r
549\r
550 @retval EFI_SUCCESS The attributes were cleared for the memory region.\r
551 @retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by\r
552 BaseAddress and Length cannot be modified.\r
553 @retval EFI_INVALID_PARAMETER Length is zero.\r
554 Attributes specified an illegal combination of attributes that\r
555 cannot be set together.\r
556 @retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of\r
557 the memory resource range.\r
558 @retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory\r
559 resource range specified by BaseAddress and Length.\r
560 The bit mask of attributes is not support for the memory resource\r
561 range specified by BaseAddress and Length.\r
562\r
563**/\r
564EFI_STATUS\r
565EFIAPI\r
566SmmClearMemoryAttributesEx (\r
567 IN EFI_PHYSICAL_ADDRESS BaseAddress,\r
568 IN UINT64 Length,\r
569 IN UINT64 Attributes,\r
570 OUT BOOLEAN *IsSplitted OPTIONAL\r
571 )\r
572{\r
573 EFI_STATUS Status;\r
574 BOOLEAN IsModified;\r
575\r
576 Status = ConvertMemoryPageAttributes (BaseAddress, Length, Attributes, FALSE, IsSplitted, &IsModified);\r
577 if (!EFI_ERROR(Status)) {\r
578 if (IsModified) {\r
579 //\r
580 // Flush TLB as last step\r
581 //\r
582 FlushTlbForAll();\r
583 }\r
584 }\r
585\r
586 return Status;\r
587}\r
588\r
589/**\r
590 This function sets the attributes for the memory region specified by BaseAddress and\r
591 Length from their current attributes to the attributes specified by Attributes.\r
592\r
593 @param[in] BaseAddress The physical address that is the start address of a memory region.\r
594 @param[in] Length The size in bytes of the memory region.\r
595 @param[in] Attributes The bit mask of attributes to set for the memory region.\r
596\r
597 @retval EFI_SUCCESS The attributes were set for the memory region.\r
598 @retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by\r
599 BaseAddress and Length cannot be modified.\r
600 @retval EFI_INVALID_PARAMETER Length is zero.\r
601 Attributes specified an illegal combination of attributes that\r
602 cannot be set together.\r
603 @retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of\r
604 the memory resource range.\r
605 @retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory\r
606 resource range specified by BaseAddress and Length.\r
607 The bit mask of attributes is not support for the memory resource\r
608 range specified by BaseAddress and Length.\r
609\r
610**/\r
611EFI_STATUS\r
612EFIAPI\r
613SmmSetMemoryAttributes (\r
614 IN EFI_PHYSICAL_ADDRESS BaseAddress,\r
615 IN UINT64 Length,\r
616 IN UINT64 Attributes\r
617 )\r
618{\r
619 return SmmSetMemoryAttributesEx (BaseAddress, Length, Attributes, NULL);\r
620}\r
621\r
622/**\r
623 This function clears the attributes for the memory region specified by BaseAddress and\r
624 Length from their current attributes to the attributes specified by Attributes.\r
625\r
626 @param[in] BaseAddress The physical address that is the start address of a memory region.\r
627 @param[in] Length The size in bytes of the memory region.\r
628 @param[in] Attributes The bit mask of attributes to clear for the memory region.\r
629\r
630 @retval EFI_SUCCESS The attributes were cleared for the memory region.\r
631 @retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by\r
632 BaseAddress and Length cannot be modified.\r
633 @retval EFI_INVALID_PARAMETER Length is zero.\r
634 Attributes specified an illegal combination of attributes that\r
635 cannot be set together.\r
636 @retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of\r
637 the memory resource range.\r
638 @retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory\r
639 resource range specified by BaseAddress and Length.\r
640 The bit mask of attributes is not support for the memory resource\r
641 range specified by BaseAddress and Length.\r
642\r
643**/\r
644EFI_STATUS\r
645EFIAPI\r
646SmmClearMemoryAttributes (\r
647 IN EFI_PHYSICAL_ADDRESS BaseAddress,\r
648 IN UINT64 Length,\r
649 IN UINT64 Attributes\r
650 )\r
651{\r
652 return SmmClearMemoryAttributesEx (BaseAddress, Length, Attributes, NULL);\r
653}\r
654\r
655\r
656\r
657/**\r
658 Retrieves a pointer to the system configuration table from the SMM System Table\r
659 based on a specified GUID.\r
660\r
661 @param[in] TableGuid The pointer to table's GUID type.\r
662 @param[out] Table The pointer to the table associated with TableGuid in the EFI System Table.\r
663\r
664 @retval EFI_SUCCESS A configuration table matching TableGuid was found.\r
665 @retval EFI_NOT_FOUND A configuration table matching TableGuid could not be found.\r
666\r
667**/\r
668EFI_STATUS\r
669EFIAPI\r
670SmmGetSystemConfigurationTable (\r
671 IN EFI_GUID *TableGuid,\r
672 OUT VOID **Table\r
673 )\r
674{\r
675 UINTN Index;\r
676\r
677 ASSERT (TableGuid != NULL);\r
678 ASSERT (Table != NULL);\r
679\r
680 *Table = NULL;\r
681 for (Index = 0; Index < gSmst->NumberOfTableEntries; Index++) {\r
682 if (CompareGuid (TableGuid, &(gSmst->SmmConfigurationTable[Index].VendorGuid))) {\r
683 *Table = gSmst->SmmConfigurationTable[Index].VendorTable;\r
684 return EFI_SUCCESS;\r
685 }\r
686 }\r
687\r
688 return EFI_NOT_FOUND;\r
689}\r
690\r
691/**\r
692 This function sets SMM save state buffer to be RW and XP.\r
693**/\r
694VOID\r
695PatchSmmSaveStateMap (\r
696 VOID\r
697 )\r
698{\r
699 UINTN Index;\r
700 UINTN TileCodeSize;\r
701 UINTN TileDataSize;\r
702 UINTN TileSize;\r
703\r
704 TileCodeSize = GetSmiHandlerSize ();\r
705 TileCodeSize = ALIGN_VALUE(TileCodeSize, SIZE_4KB);\r
f12367a0 706 TileDataSize = (SMRAM_SAVE_STATE_MAP_OFFSET - SMM_PSD_OFFSET) + sizeof (SMRAM_SAVE_STATE_MAP);\r
717fb604
JY
707 TileDataSize = ALIGN_VALUE(TileDataSize, SIZE_4KB);\r
708 TileSize = TileDataSize + TileCodeSize - 1;\r
709 TileSize = 2 * GetPowerOfTwo32 ((UINT32)TileSize);\r
710\r
711 DEBUG ((DEBUG_INFO, "PatchSmmSaveStateMap:\n"));\r
712 for (Index = 0; Index < mMaxNumberOfCpus - 1; Index++) {\r
713 //\r
714 // Code\r
715 //\r
716 SmmSetMemoryAttributes (\r
717 mCpuHotPlugData.SmBase[Index] + SMM_HANDLER_OFFSET,\r
718 TileCodeSize,\r
719 EFI_MEMORY_RO\r
720 );\r
721 SmmClearMemoryAttributes (\r
722 mCpuHotPlugData.SmBase[Index] + SMM_HANDLER_OFFSET,\r
723 TileCodeSize,\r
724 EFI_MEMORY_XP\r
725 );\r
726\r
727 //\r
728 // Data\r
729 //\r
730 SmmClearMemoryAttributes (\r
731 mCpuHotPlugData.SmBase[Index] + SMM_HANDLER_OFFSET + TileCodeSize,\r
732 TileSize - TileCodeSize,\r
733 EFI_MEMORY_RO\r
734 );\r
735 SmmSetMemoryAttributes (\r
736 mCpuHotPlugData.SmBase[Index] + SMM_HANDLER_OFFSET + TileCodeSize,\r
737 TileSize - TileCodeSize,\r
738 EFI_MEMORY_XP\r
739 );\r
740 }\r
741\r
742 //\r
743 // Code\r
744 //\r
745 SmmSetMemoryAttributes (\r
746 mCpuHotPlugData.SmBase[mMaxNumberOfCpus - 1] + SMM_HANDLER_OFFSET,\r
747 TileCodeSize,\r
748 EFI_MEMORY_RO\r
749 );\r
750 SmmClearMemoryAttributes (\r
751 mCpuHotPlugData.SmBase[mMaxNumberOfCpus - 1] + SMM_HANDLER_OFFSET,\r
752 TileCodeSize,\r
753 EFI_MEMORY_XP\r
754 );\r
755\r
756 //\r
757 // Data\r
758 //\r
759 SmmClearMemoryAttributes (\r
760 mCpuHotPlugData.SmBase[mMaxNumberOfCpus - 1] + SMM_HANDLER_OFFSET + TileCodeSize,\r
761 SIZE_32KB - TileCodeSize,\r
762 EFI_MEMORY_RO\r
763 );\r
764 SmmSetMemoryAttributes (\r
765 mCpuHotPlugData.SmBase[mMaxNumberOfCpus - 1] + SMM_HANDLER_OFFSET + TileCodeSize,\r
766 SIZE_32KB - TileCodeSize,\r
767 EFI_MEMORY_XP\r
768 );\r
769}\r
770\r
717fb604
JY
771/**\r
772 This function sets memory attribute according to MemoryAttributesTable.\r
773**/\r
774VOID\r
775SetMemMapAttributes (\r
776 VOID\r
777 )\r
778{\r
779 EFI_MEMORY_DESCRIPTOR *MemoryMap;\r
780 EFI_MEMORY_DESCRIPTOR *MemoryMapStart;\r
781 UINTN MemoryMapEntryCount;\r
782 UINTN DescriptorSize;\r
783 UINTN Index;\r
784 EDKII_PI_SMM_MEMORY_ATTRIBUTES_TABLE *MemoryAttributesTable;\r
785\r
786 SmmGetSystemConfigurationTable (&gEdkiiPiSmmMemoryAttributesTableGuid, (VOID **)&MemoryAttributesTable);\r
787 if (MemoryAttributesTable == NULL) {\r
788 DEBUG ((DEBUG_INFO, "MemoryAttributesTable - NULL\n"));\r
789 return ;\r
790 }\r
791\r
792 DEBUG ((DEBUG_INFO, "MemoryAttributesTable:\n"));\r
793 DEBUG ((DEBUG_INFO, " Version - 0x%08x\n", MemoryAttributesTable->Version));\r
794 DEBUG ((DEBUG_INFO, " NumberOfEntries - 0x%08x\n", MemoryAttributesTable->NumberOfEntries));\r
795 DEBUG ((DEBUG_INFO, " DescriptorSize - 0x%08x\n", MemoryAttributesTable->DescriptorSize));\r
796\r
797 MemoryMapEntryCount = MemoryAttributesTable->NumberOfEntries;\r
798 DescriptorSize = MemoryAttributesTable->DescriptorSize;\r
799 MemoryMapStart = (EFI_MEMORY_DESCRIPTOR *)(MemoryAttributesTable + 1);\r
800 MemoryMap = MemoryMapStart;\r
801 for (Index = 0; Index < MemoryMapEntryCount; Index++) {\r
802 DEBUG ((DEBUG_INFO, "Entry (0x%x)\n", MemoryMap));\r
803 DEBUG ((DEBUG_INFO, " Type - 0x%x\n", MemoryMap->Type));\r
804 DEBUG ((DEBUG_INFO, " PhysicalStart - 0x%016lx\n", MemoryMap->PhysicalStart));\r
805 DEBUG ((DEBUG_INFO, " VirtualStart - 0x%016lx\n", MemoryMap->VirtualStart));\r
806 DEBUG ((DEBUG_INFO, " NumberOfPages - 0x%016lx\n", MemoryMap->NumberOfPages));\r
807 DEBUG ((DEBUG_INFO, " Attribute - 0x%016lx\n", MemoryMap->Attribute));\r
808 MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, DescriptorSize);\r
809 }\r
810\r
811 MemoryMap = MemoryMapStart;\r
812 for (Index = 0; Index < MemoryMapEntryCount; Index++) {\r
813 DEBUG ((DEBUG_VERBOSE, "SetAttribute: Memory Entry - 0x%lx, 0x%x\n", MemoryMap->PhysicalStart, MemoryMap->NumberOfPages));\r
814 switch (MemoryMap->Type) {\r
815 case EfiRuntimeServicesCode:\r
816 SmmSetMemoryAttributes (\r
817 MemoryMap->PhysicalStart,\r
818 EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages),\r
819 EFI_MEMORY_RO\r
820 );\r
821 break;\r
822 case EfiRuntimeServicesData:\r
823 SmmSetMemoryAttributes (\r
824 MemoryMap->PhysicalStart,\r
825 EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages),\r
826 EFI_MEMORY_XP\r
827 );\r
828 break;\r
829 default:\r
830 SmmSetMemoryAttributes (\r
831 MemoryMap->PhysicalStart,\r
832 EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages),\r
833 EFI_MEMORY_XP\r
834 );\r
835 break;\r
836 }\r
837 MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, DescriptorSize);\r
838 }\r
839\r
840 PatchSmmSaveStateMap ();\r
841 PatchGdtIdtMap ();\r
842\r
843 return ;\r
844}\r
d2fc7711
JY
845\r
846/**\r
847 Sort memory map entries based upon PhysicalStart, from low to high.\r
848\r
849 @param MemoryMap A pointer to the buffer in which firmware places\r
850 the current memory map.\r
851 @param MemoryMapSize Size, in bytes, of the MemoryMap buffer.\r
852 @param DescriptorSize Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.\r
853**/\r
854STATIC\r
855VOID\r
856SortMemoryMap (\r
857 IN OUT EFI_MEMORY_DESCRIPTOR *MemoryMap,\r
858 IN UINTN MemoryMapSize,\r
859 IN UINTN DescriptorSize\r
860 )\r
861{\r
862 EFI_MEMORY_DESCRIPTOR *MemoryMapEntry;\r
863 EFI_MEMORY_DESCRIPTOR *NextMemoryMapEntry;\r
864 EFI_MEMORY_DESCRIPTOR *MemoryMapEnd;\r
865 EFI_MEMORY_DESCRIPTOR TempMemoryMap;\r
866\r
867 MemoryMapEntry = MemoryMap;\r
868 NextMemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (MemoryMapEntry, DescriptorSize);\r
869 MemoryMapEnd = (EFI_MEMORY_DESCRIPTOR *) ((UINT8 *) MemoryMap + MemoryMapSize);\r
870 while (MemoryMapEntry < MemoryMapEnd) {\r
871 while (NextMemoryMapEntry < MemoryMapEnd) {\r
872 if (MemoryMapEntry->PhysicalStart > NextMemoryMapEntry->PhysicalStart) {\r
873 CopyMem (&TempMemoryMap, MemoryMapEntry, sizeof(EFI_MEMORY_DESCRIPTOR));\r
874 CopyMem (MemoryMapEntry, NextMemoryMapEntry, sizeof(EFI_MEMORY_DESCRIPTOR));\r
875 CopyMem (NextMemoryMapEntry, &TempMemoryMap, sizeof(EFI_MEMORY_DESCRIPTOR));\r
876 }\r
877\r
878 NextMemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (NextMemoryMapEntry, DescriptorSize);\r
879 }\r
880\r
881 MemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (MemoryMapEntry, DescriptorSize);\r
882 NextMemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (MemoryMapEntry, DescriptorSize);\r
883 }\r
884}\r
885\r
886/**\r
887 Return if a UEFI memory page should be marked as not present in SMM page table.\r
888 If the memory map entries type is\r
889 EfiLoaderCode/Data, EfiBootServicesCode/Data, EfiConventionalMemory,\r
890 EfiUnusableMemory, EfiACPIReclaimMemory, return TRUE.\r
891 Or return FALSE.\r
892\r
893 @param[in] MemoryMap A pointer to the memory descriptor.\r
894\r
895 @return TRUE The memory described will be marked as not present in SMM page table.\r
896 @return FALSE The memory described will not be marked as not present in SMM page table.\r
897**/\r
898BOOLEAN\r
899IsUefiPageNotPresent (\r
900 IN EFI_MEMORY_DESCRIPTOR *MemoryMap\r
901 )\r
902{\r
903 switch (MemoryMap->Type) {\r
904 case EfiLoaderCode:\r
905 case EfiLoaderData:\r
906 case EfiBootServicesCode:\r
907 case EfiBootServicesData:\r
908 case EfiConventionalMemory:\r
909 case EfiUnusableMemory:\r
910 case EfiACPIReclaimMemory:\r
911 return TRUE;\r
912 default:\r
913 return FALSE;\r
914 }\r
915}\r
916\r
917/**\r
918 Merge continous memory map entries whose type is\r
919 EfiLoaderCode/Data, EfiBootServicesCode/Data, EfiConventionalMemory,\r
920 EfiUnusableMemory, EfiACPIReclaimMemory, because the memory described by\r
921 these entries will be set as NOT present in SMM page table.\r
922\r
923 @param[in, out] MemoryMap A pointer to the buffer in which firmware places\r
924 the current memory map.\r
925 @param[in, out] MemoryMapSize A pointer to the size, in bytes, of the\r
926 MemoryMap buffer. On input, this is the size of\r
927 the current memory map. On output,\r
928 it is the size of new memory map after merge.\r
929 @param[in] DescriptorSize Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.\r
930**/\r
931STATIC\r
932VOID\r
933MergeMemoryMapForNotPresentEntry (\r
934 IN OUT EFI_MEMORY_DESCRIPTOR *MemoryMap,\r
935 IN OUT UINTN *MemoryMapSize,\r
936 IN UINTN DescriptorSize\r
937 )\r
938{\r
939 EFI_MEMORY_DESCRIPTOR *MemoryMapEntry;\r
940 EFI_MEMORY_DESCRIPTOR *MemoryMapEnd;\r
941 UINT64 MemoryBlockLength;\r
942 EFI_MEMORY_DESCRIPTOR *NewMemoryMapEntry;\r
943 EFI_MEMORY_DESCRIPTOR *NextMemoryMapEntry;\r
944\r
945 MemoryMapEntry = MemoryMap;\r
946 NewMemoryMapEntry = MemoryMap;\r
947 MemoryMapEnd = (EFI_MEMORY_DESCRIPTOR *) ((UINT8 *) MemoryMap + *MemoryMapSize);\r
948 while ((UINTN)MemoryMapEntry < (UINTN)MemoryMapEnd) {\r
949 CopyMem (NewMemoryMapEntry, MemoryMapEntry, sizeof(EFI_MEMORY_DESCRIPTOR));\r
950 NextMemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (MemoryMapEntry, DescriptorSize);\r
951\r
952 do {\r
953 MemoryBlockLength = (UINT64) (EFI_PAGES_TO_SIZE((UINTN)MemoryMapEntry->NumberOfPages));\r
954 if (((UINTN)NextMemoryMapEntry < (UINTN)MemoryMapEnd) &&\r
955 IsUefiPageNotPresent(MemoryMapEntry) && IsUefiPageNotPresent(NextMemoryMapEntry) &&\r
956 ((MemoryMapEntry->PhysicalStart + MemoryBlockLength) == NextMemoryMapEntry->PhysicalStart)) {\r
957 MemoryMapEntry->NumberOfPages += NextMemoryMapEntry->NumberOfPages;\r
958 if (NewMemoryMapEntry != MemoryMapEntry) {\r
959 NewMemoryMapEntry->NumberOfPages += NextMemoryMapEntry->NumberOfPages;\r
960 }\r
961\r
962 NextMemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (NextMemoryMapEntry, DescriptorSize);\r
963 continue;\r
964 } else {\r
965 MemoryMapEntry = PREVIOUS_MEMORY_DESCRIPTOR (NextMemoryMapEntry, DescriptorSize);\r
966 break;\r
967 }\r
968 } while (TRUE);\r
969\r
970 MemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (MemoryMapEntry, DescriptorSize);\r
971 NewMemoryMapEntry = NEXT_MEMORY_DESCRIPTOR (NewMemoryMapEntry, DescriptorSize);\r
972 }\r
973\r
974 *MemoryMapSize = (UINTN)NewMemoryMapEntry - (UINTN)MemoryMap;\r
975\r
976 return ;\r
977}\r
978\r
979/**\r
980 This function caches the UEFI memory map information.\r
981**/\r
982VOID\r
983GetUefiMemoryMap (\r
984 VOID\r
985 )\r
986{\r
987 EFI_STATUS Status;\r
988 UINTN MapKey;\r
989 UINT32 DescriptorVersion;\r
990 EFI_MEMORY_DESCRIPTOR *MemoryMap;\r
991 UINTN UefiMemoryMapSize;\r
992\r
993 DEBUG ((DEBUG_INFO, "GetUefiMemoryMap\n"));\r
994\r
995 UefiMemoryMapSize = 0;\r
996 MemoryMap = NULL;\r
997 Status = gBS->GetMemoryMap (\r
998 &UefiMemoryMapSize,\r
999 MemoryMap,\r
1000 &MapKey,\r
1001 &mUefiDescriptorSize,\r
1002 &DescriptorVersion\r
1003 );\r
1004 ASSERT (Status == EFI_BUFFER_TOO_SMALL);\r
1005\r
1006 do {\r
1007 Status = gBS->AllocatePool (EfiBootServicesData, UefiMemoryMapSize, (VOID **)&MemoryMap);\r
1008 ASSERT (MemoryMap != NULL);\r
1009 if (MemoryMap == NULL) {\r
1010 return ;\r
1011 }\r
1012\r
1013 Status = gBS->GetMemoryMap (\r
1014 &UefiMemoryMapSize,\r
1015 MemoryMap,\r
1016 &MapKey,\r
1017 &mUefiDescriptorSize,\r
1018 &DescriptorVersion\r
1019 );\r
1020 if (EFI_ERROR (Status)) {\r
1021 gBS->FreePool (MemoryMap);\r
1022 MemoryMap = NULL;\r
1023 }\r
1024 } while (Status == EFI_BUFFER_TOO_SMALL);\r
1025\r
403f5476
HW
1026 if (MemoryMap == NULL) {\r
1027 return ;\r
1028 }\r
1029\r
d2fc7711
JY
1030 SortMemoryMap (MemoryMap, UefiMemoryMapSize, mUefiDescriptorSize);\r
1031 MergeMemoryMapForNotPresentEntry (MemoryMap, &UefiMemoryMapSize, mUefiDescriptorSize);\r
1032\r
1033 mUefiMemoryMapSize = UefiMemoryMapSize;\r
1034 mUefiMemoryMap = AllocateCopyPool (UefiMemoryMapSize, MemoryMap);\r
1035 ASSERT (mUefiMemoryMap != NULL);\r
1036\r
1037 gBS->FreePool (MemoryMap);\r
1038}\r
1039\r
1040/**\r
1041 This function sets UEFI memory attribute according to UEFI memory map.\r
1042\r
1043 The normal memory region is marked as not present, such as\r
1044 EfiLoaderCode/Data, EfiBootServicesCode/Data, EfiConventionalMemory,\r
1045 EfiUnusableMemory, EfiACPIReclaimMemory.\r
1046**/\r
1047VOID\r
1048SetUefiMemMapAttributes (\r
1049 VOID\r
1050 )\r
1051{\r
714c2603 1052 EFI_STATUS Status;\r
d2fc7711
JY
1053 EFI_MEMORY_DESCRIPTOR *MemoryMap;\r
1054 UINTN MemoryMapEntryCount;\r
1055 UINTN Index;\r
1056\r
1057 DEBUG ((DEBUG_INFO, "SetUefiMemMapAttributes\n"));\r
1058\r
1059 if (mUefiMemoryMap == NULL) {\r
1060 DEBUG ((DEBUG_INFO, "UefiMemoryMap - NULL\n"));\r
1061 return ;\r
1062 }\r
1063\r
1064 MemoryMapEntryCount = mUefiMemoryMapSize/mUefiDescriptorSize;\r
1065 MemoryMap = mUefiMemoryMap;\r
1066 for (Index = 0; Index < MemoryMapEntryCount; Index++) {\r
1067 if (IsUefiPageNotPresent(MemoryMap)) {\r
714c2603
SZ
1068 Status = SmmSetMemoryAttributes (\r
1069 MemoryMap->PhysicalStart,\r
1070 EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages),\r
1071 EFI_MEMORY_RP\r
1072 );\r
1073 DEBUG ((\r
1074 DEBUG_INFO,\r
1075 "UefiMemory protection: 0x%lx - 0x%lx %r\n",\r
d2fc7711 1076 MemoryMap->PhysicalStart,\r
714c2603
SZ
1077 MemoryMap->PhysicalStart + (UINT64)EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages),\r
1078 Status\r
1079 ));\r
d2fc7711
JY
1080 }\r
1081 MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, mUefiDescriptorSize);\r
1082 }\r
1083\r
1084 //\r
1085 // Do free mUefiMemoryMap, it will be checked in IsSmmCommBufferForbiddenAddress().\r
1086 //\r
1087}\r
1088\r
1089/**\r
1090 Return if the Address is forbidden as SMM communication buffer.\r
1091\r
1092 @param[in] Address the address to be checked\r
1093\r
1094 @return TRUE The address is forbidden as SMM communication buffer.\r
1095 @return FALSE The address is allowed as SMM communication buffer.\r
1096**/\r
1097BOOLEAN\r
1098IsSmmCommBufferForbiddenAddress (\r
1099 IN UINT64 Address\r
1100 )\r
1101{\r
1102 EFI_MEMORY_DESCRIPTOR *MemoryMap;\r
1103 UINTN MemoryMapEntryCount;\r
1104 UINTN Index;\r
1105\r
403f5476
HW
1106 if (mUefiMemoryMap == NULL) {\r
1107 return FALSE;\r
1108 }\r
1109\r
d2fc7711
JY
1110 MemoryMap = mUefiMemoryMap;\r
1111 MemoryMapEntryCount = mUefiMemoryMapSize/mUefiDescriptorSize;\r
1112 for (Index = 0; Index < MemoryMapEntryCount; Index++) {\r
1113 if (IsUefiPageNotPresent (MemoryMap)) {\r
1114 if ((Address >= MemoryMap->PhysicalStart) &&\r
1115 (Address < MemoryMap->PhysicalStart + EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages)) ) {\r
1116 return TRUE;\r
1117 }\r
1118 }\r
1119 MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, mUefiDescriptorSize);\r
1120 }\r
1121 return FALSE;\r
1122}\r