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Commit | Line | Data |
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3e8ad6bd JF |
1 | /** @file\r |
2 | MP initialize support functions for DXE phase.\r | |
3 | \r | |
c788c2b1 | 4 | Copyright (c) 2016 - 2020, Intel Corporation. All rights reserved.<BR>\r |
0acd8697 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
3e8ad6bd JF |
6 | \r |
7 | **/\r | |
8 | \r | |
9 | #include "MpLib.h"\r | |
96378861 JF |
10 | \r |
11 | #include <Library/UefiLib.h>\r | |
12 | #include <Library/UefiBootServicesTableLib.h>\r | |
43c9fdcc | 13 | #include <Library/DebugAgentLib.h>\r |
15720a6c | 14 | #include <Library/DxeServicesTableLib.h>\r |
20da7ca4 | 15 | #include <Library/VmgExitLib.h>\r |
7b7508ad TL |
16 | #include <Register/Amd/Fam17Msr.h>\r |
17 | #include <Register/Amd/Ghcb.h>\r | |
96378861 | 18 | \r |
b6e45716 JF |
19 | #include <Protocol/Timer.h>\r |
20 | \r | |
bf2786dc | 21 | #define AP_SAFE_STACK_SIZE 128\r |
96378861 | 22 | \r |
93ca4c0f | 23 | CPU_MP_DATA *mCpuMpData = NULL;\r |
96378861 | 24 | EFI_EVENT mCheckAllApsEvent = NULL;\r |
4d3314f6 | 25 | EFI_EVENT mMpInitExitBootServicesEvent = NULL;\r |
8677a56a | 26 | EFI_EVENT mLegacyBootEvent = NULL;\r |
96378861 | 27 | volatile BOOLEAN mStopCheckAllApsStatus = TRUE;\r |
5183fb37 | 28 | VOID *mReservedApLoopFunc = NULL;\r |
bf2786dc | 29 | UINTN mReservedTopOfApStack;\r |
9f91cb01 | 30 | volatile UINT32 mNumberToFinish = 0;\r |
93ca4c0f | 31 | \r |
43c9fdcc JF |
32 | /**\r |
33 | Enable Debug Agent to support source debugging on AP function.\r | |
34 | \r | |
35 | **/\r | |
36 | VOID\r | |
37 | EnableDebugAgent (\r | |
38 | VOID\r | |
39 | )\r | |
40 | {\r | |
41 | //\r | |
42 | // Initialize Debug Agent to support source level debug in DXE phase\r | |
43 | //\r | |
44 | InitializeDebugAgent (DEBUG_AGENT_INIT_DXE_AP, NULL, NULL);\r | |
45 | }\r | |
46 | \r | |
93ca4c0f JF |
47 | /**\r |
48 | Get the pointer to CPU MP Data structure.\r | |
49 | \r | |
50 | @return The pointer to CPU MP Data structure.\r | |
51 | **/\r | |
52 | CPU_MP_DATA *\r | |
53 | GetCpuMpData (\r | |
54 | VOID\r | |
55 | )\r | |
56 | {\r | |
57 | ASSERT (mCpuMpData != NULL);\r | |
58 | return mCpuMpData;\r | |
59 | }\r | |
60 | \r | |
61 | /**\r | |
62 | Save the pointer to CPU MP Data structure.\r | |
63 | \r | |
64 | @param[in] CpuMpData The pointer to CPU MP Data structure will be saved.\r | |
65 | **/\r | |
66 | VOID\r | |
67 | SaveCpuMpData (\r | |
68 | IN CPU_MP_DATA *CpuMpData\r | |
69 | )\r | |
70 | {\r | |
71 | mCpuMpData = CpuMpData;\r | |
72 | }\r | |
73 | \r | |
96378861 | 74 | /**\r |
e4ff6349 | 75 | Get available system memory below 0x88000 by specified size.\r |
ed66e0e3 | 76 | \r |
a6b3d753 | 77 | @param[in] WakeupBufferSize Wakeup buffer size required\r |
3ed4e502 | 78 | \r |
a6b3d753 SZ |
79 | @retval other Return wakeup buffer address below 1MB.\r |
80 | @retval -1 Cannot find free memory below 1MB.\r | |
ed66e0e3 | 81 | **/\r |
a6b3d753 SZ |
82 | UINTN\r |
83 | GetWakeupBuffer (\r | |
84 | IN UINTN WakeupBufferSize\r | |
ed66e0e3 JF |
85 | )\r |
86 | {\r | |
a6b3d753 SZ |
87 | EFI_STATUS Status;\r |
88 | EFI_PHYSICAL_ADDRESS StartAddress;\r | |
20da7ca4 TL |
89 | EFI_MEMORY_TYPE MemoryType;\r |
90 | \r | |
91 | if (PcdGetBool (PcdSevEsIsEnabled)) {\r | |
92 | MemoryType = EfiReservedMemoryType;\r | |
93 | } else {\r | |
94 | MemoryType = EfiBootServicesData;\r | |
95 | }\r | |
a6b3d753 | 96 | \r |
e4ff6349 ED |
97 | //\r |
98 | // Try to allocate buffer below 1M for waking vector.\r | |
99 | // LegacyBios driver only reports warning when page allocation in range\r | |
100 | // [0x60000, 0x88000) fails.\r | |
101 | // This library is consumed by CpuDxe driver to produce CPU Arch protocol.\r | |
102 | // LagacyBios driver depends on CPU Arch protocol which guarantees below\r | |
103 | // allocation runs earlier than LegacyBios driver.\r | |
104 | //\r | |
105 | StartAddress = 0x88000;\r | |
a6b3d753 SZ |
106 | Status = gBS->AllocatePages (\r |
107 | AllocateMaxAddress,\r | |
20da7ca4 | 108 | MemoryType,\r |
a6b3d753 SZ |
109 | EFI_SIZE_TO_PAGES (WakeupBufferSize),\r |
110 | &StartAddress\r | |
111 | );\r | |
112 | ASSERT_EFI_ERROR (Status);\r | |
e4ff6349 | 113 | if (EFI_ERROR (Status)) {\r |
a6b3d753 | 114 | StartAddress = (EFI_PHYSICAL_ADDRESS) -1;\r |
3ed4e502 | 115 | }\r |
e4ff6349 ED |
116 | \r |
117 | DEBUG ((DEBUG_INFO, "WakeupBufferStart = %x, WakeupBufferSize = %x\n",\r | |
118 | (UINTN) StartAddress, WakeupBufferSize));\r | |
119 | \r | |
a6b3d753 | 120 | return (UINTN) StartAddress;\r |
ed66e0e3 JF |
121 | }\r |
122 | \r | |
f32bfe6d JW |
123 | /**\r |
124 | Get available EfiBootServicesCode memory below 4GB by specified size.\r | |
125 | \r | |
126 | This buffer is required to safely transfer AP from real address mode to\r | |
127 | protected mode or long mode, due to the fact that the buffer returned by\r | |
128 | GetWakeupBuffer() may be marked as non-executable.\r | |
129 | \r | |
130 | @param[in] BufferSize Wakeup transition buffer size.\r | |
131 | \r | |
132 | @retval other Return wakeup transition buffer address below 4GB.\r | |
133 | @retval 0 Cannot find free memory below 4GB.\r | |
134 | **/\r | |
135 | UINTN\r | |
136 | GetModeTransitionBuffer (\r | |
137 | IN UINTN BufferSize\r | |
138 | )\r | |
139 | {\r | |
140 | EFI_STATUS Status;\r | |
141 | EFI_PHYSICAL_ADDRESS StartAddress;\r | |
142 | \r | |
143 | StartAddress = BASE_4GB - 1;\r | |
144 | Status = gBS->AllocatePages (\r | |
145 | AllocateMaxAddress,\r | |
146 | EfiBootServicesCode,\r | |
147 | EFI_SIZE_TO_PAGES (BufferSize),\r | |
148 | &StartAddress\r | |
149 | );\r | |
150 | if (EFI_ERROR (Status)) {\r | |
151 | StartAddress = 0;\r | |
152 | }\r | |
153 | \r | |
154 | return (UINTN)StartAddress;\r | |
155 | }\r | |
156 | \r | |
7b7508ad TL |
157 | /**\r |
158 | Return the address of the SEV-ES AP jump table.\r | |
159 | \r | |
160 | This buffer is required in order for an SEV-ES guest to transition from\r | |
161 | UEFI into an OS.\r | |
162 | \r | |
163 | @return Return SEV-ES AP jump table buffer\r | |
164 | **/\r | |
165 | UINTN\r | |
166 | GetSevEsAPMemory (\r | |
167 | VOID\r | |
168 | )\r | |
169 | {\r | |
20da7ca4 TL |
170 | EFI_STATUS Status;\r |
171 | EFI_PHYSICAL_ADDRESS StartAddress;\r | |
172 | MSR_SEV_ES_GHCB_REGISTER Msr;\r | |
173 | GHCB *Ghcb;\r | |
7b7508ad TL |
174 | \r |
175 | //\r | |
176 | // Allocate 1 page for AP jump table page\r | |
177 | //\r | |
178 | StartAddress = BASE_4GB - 1;\r | |
179 | Status = gBS->AllocatePages (\r | |
180 | AllocateMaxAddress,\r | |
181 | EfiReservedMemoryType,\r | |
182 | 1,\r | |
183 | &StartAddress\r | |
184 | );\r | |
185 | ASSERT_EFI_ERROR (Status);\r | |
186 | \r | |
187 | DEBUG ((DEBUG_INFO, "Dxe: SevEsAPMemory = %lx\n", (UINTN) StartAddress));\r | |
188 | \r | |
20da7ca4 TL |
189 | //\r |
190 | // Save the SevEsAPMemory as the AP jump table.\r | |
191 | //\r | |
192 | Msr.GhcbPhysicalAddress = AsmReadMsr64 (MSR_SEV_ES_GHCB);\r | |
193 | Ghcb = Msr.Ghcb;\r | |
194 | \r | |
195 | VmgInit (Ghcb);\r | |
196 | VmgExit (Ghcb, SVM_EXIT_AP_JUMP_TABLE, 0, (UINT64) (UINTN) StartAddress);\r | |
197 | VmgDone (Ghcb);\r | |
198 | \r | |
7b7508ad TL |
199 | return (UINTN) StartAddress;\r |
200 | }\r | |
201 | \r | |
96378861 JF |
202 | /**\r |
203 | Checks APs status and updates APs status if needed.\r | |
204 | \r | |
205 | **/\r | |
206 | VOID\r | |
207 | CheckAndUpdateApsStatus (\r | |
208 | VOID\r | |
209 | )\r | |
210 | {\r | |
08085f08 JF |
211 | UINTN ProcessorNumber;\r |
212 | EFI_STATUS Status;\r | |
213 | CPU_MP_DATA *CpuMpData;\r | |
214 | \r | |
215 | CpuMpData = GetCpuMpData ();\r | |
216 | \r | |
217 | //\r | |
218 | // First, check whether pending StartupAllAPs() exists.\r | |
219 | //\r | |
220 | if (CpuMpData->WaitEvent != NULL) {\r | |
221 | \r | |
222 | Status = CheckAllAPs ();\r | |
223 | //\r | |
224 | // If all APs finish for StartupAllAPs(), signal the WaitEvent for it.\r | |
225 | //\r | |
226 | if (Status != EFI_NOT_READY) {\r | |
227 | Status = gBS->SignalEvent (CpuMpData->WaitEvent);\r | |
228 | CpuMpData->WaitEvent = NULL;\r | |
229 | }\r | |
230 | }\r | |
231 | \r | |
232 | //\r | |
233 | // Second, check whether pending StartupThisAPs() callings exist.\r | |
234 | //\r | |
235 | for (ProcessorNumber = 0; ProcessorNumber < CpuMpData->CpuCount; ProcessorNumber++) {\r | |
236 | \r | |
237 | if (CpuMpData->CpuData[ProcessorNumber].WaitEvent == NULL) {\r | |
238 | continue;\r | |
239 | }\r | |
240 | \r | |
241 | Status = CheckThisAP (ProcessorNumber);\r | |
242 | \r | |
243 | if (Status != EFI_NOT_READY) {\r | |
244 | gBS->SignalEvent (CpuMpData->CpuData[ProcessorNumber].WaitEvent);\r | |
245 | CpuMpData->CpuData[ProcessorNumber].WaitEvent = NULL;\r | |
246 | }\r | |
247 | }\r | |
96378861 JF |
248 | }\r |
249 | \r | |
250 | /**\r | |
251 | Checks APs' status periodically.\r | |
252 | \r | |
438f1766 | 253 | This function is triggered by timer periodically to check the\r |
96378861 JF |
254 | state of APs for StartupAllAPs() and StartupThisAP() executed\r |
255 | in non-blocking mode.\r | |
256 | \r | |
257 | @param[in] Event Event triggered.\r | |
258 | @param[in] Context Parameter passed with the event.\r | |
259 | \r | |
260 | **/\r | |
261 | VOID\r | |
262 | EFIAPI\r | |
263 | CheckApsStatus (\r | |
264 | IN EFI_EVENT Event,\r | |
265 | IN VOID *Context\r | |
266 | )\r | |
267 | {\r | |
268 | //\r | |
269 | // If CheckApsStatus() is not stopped, otherwise return immediately.\r | |
270 | //\r | |
271 | if (!mStopCheckAllApsStatus) {\r | |
272 | CheckAndUpdateApsStatus ();\r | |
273 | }\r | |
274 | }\r | |
ed66e0e3 | 275 | \r |
7b7508ad TL |
276 | /**\r |
277 | Get Protected mode code segment with 16-bit default addressing\r | |
278 | from current GDT table.\r | |
279 | \r | |
280 | @return Protected mode 16-bit code segment value.\r | |
281 | **/\r | |
282 | UINT16\r | |
283 | GetProtectedMode16CS (\r | |
284 | VOID\r | |
285 | )\r | |
286 | {\r | |
287 | IA32_DESCRIPTOR GdtrDesc;\r | |
288 | IA32_SEGMENT_DESCRIPTOR *GdtEntry;\r | |
289 | UINTN GdtEntryCount;\r | |
290 | UINT16 Index;\r | |
291 | \r | |
292 | Index = (UINT16) -1;\r | |
293 | AsmReadGdtr (&GdtrDesc);\r | |
294 | GdtEntryCount = (GdtrDesc.Limit + 1) / sizeof (IA32_SEGMENT_DESCRIPTOR);\r | |
295 | GdtEntry = (IA32_SEGMENT_DESCRIPTOR *) GdtrDesc.Base;\r | |
296 | for (Index = 0; Index < GdtEntryCount; Index++) {\r | |
297 | if (GdtEntry->Bits.L == 0) {\r | |
298 | if (GdtEntry->Bits.Type > 8 && GdtEntry->Bits.DB == 0) {\r | |
299 | break;\r | |
300 | }\r | |
301 | }\r | |
302 | GdtEntry++;\r | |
303 | }\r | |
304 | ASSERT (Index != GdtEntryCount);\r | |
305 | return Index * 8;\r | |
306 | }\r | |
307 | \r | |
4d3314f6 JF |
308 | /**\r |
309 | Get Protected mode code segment from current GDT table.\r | |
310 | \r | |
b31c1ad1 | 311 | @return Protected mode code segment value.\r |
4d3314f6 JF |
312 | **/\r |
313 | UINT16\r | |
314 | GetProtectedModeCS (\r | |
315 | VOID\r | |
316 | )\r | |
317 | {\r | |
318 | IA32_DESCRIPTOR GdtrDesc;\r | |
319 | IA32_SEGMENT_DESCRIPTOR *GdtEntry;\r | |
320 | UINTN GdtEntryCount;\r | |
321 | UINT16 Index;\r | |
322 | \r | |
4d3314f6 JF |
323 | AsmReadGdtr (&GdtrDesc);\r |
324 | GdtEntryCount = (GdtrDesc.Limit + 1) / sizeof (IA32_SEGMENT_DESCRIPTOR);\r | |
325 | GdtEntry = (IA32_SEGMENT_DESCRIPTOR *) GdtrDesc.Base;\r | |
326 | for (Index = 0; Index < GdtEntryCount; Index++) {\r | |
327 | if (GdtEntry->Bits.L == 0) {\r | |
7b7508ad | 328 | if (GdtEntry->Bits.Type > 8 && GdtEntry->Bits.DB == 1) {\r |
4d3314f6 JF |
329 | break;\r |
330 | }\r | |
331 | }\r | |
332 | GdtEntry++;\r | |
333 | }\r | |
37fba7c2 | 334 | ASSERT (Index != GdtEntryCount);\r |
4d3314f6 JF |
335 | return Index * 8;\r |
336 | }\r | |
337 | \r | |
338 | /**\r | |
339 | Do sync on APs.\r | |
340 | \r | |
341 | @param[in, out] Buffer Pointer to private data buffer.\r | |
342 | **/\r | |
343 | VOID\r | |
344 | EFIAPI\r | |
345 | RelocateApLoop (\r | |
346 | IN OUT VOID *Buffer\r | |
347 | )\r | |
348 | {\r | |
349 | CPU_MP_DATA *CpuMpData;\r | |
350 | BOOLEAN MwaitSupport;\r | |
351 | ASM_RELOCATE_AP_LOOP AsmRelocateApLoopFunc;\r | |
bf2786dc | 352 | UINTN ProcessorNumber;\r |
20da7ca4 | 353 | UINTN StackStart;\r |
4d3314f6 | 354 | \r |
7367cc6c | 355 | MpInitLibWhoAmI (&ProcessorNumber);\r |
4d3314f6 JF |
356 | CpuMpData = GetCpuMpData ();\r |
357 | MwaitSupport = IsMwaitSupport ();\r | |
20da7ca4 TL |
358 | if (CpuMpData->SevEsIsEnabled) {\r |
359 | StackStart = CpuMpData->SevEsAPResetStackStart;\r | |
360 | } else {\r | |
361 | StackStart = mReservedTopOfApStack;\r | |
362 | }\r | |
081f6416 | 363 | AsmRelocateApLoopFunc = (ASM_RELOCATE_AP_LOOP) (UINTN) mReservedApLoopFunc;\r |
bf2786dc JF |
364 | AsmRelocateApLoopFunc (\r |
365 | MwaitSupport,\r | |
366 | CpuMpData->ApTargetCState,\r | |
367 | CpuMpData->PmCodeSegment,\r | |
20da7ca4 TL |
368 | StackStart - ProcessorNumber * AP_SAFE_STACK_SIZE,\r |
369 | (UINTN) &mNumberToFinish,\r | |
370 | CpuMpData->Pm16CodeSegment,\r | |
371 | CpuMpData->SevEsAPBuffer,\r | |
372 | CpuMpData->WakeupBuffer\r | |
bf2786dc | 373 | );\r |
4d3314f6 JF |
374 | //\r |
375 | // It should never reach here\r | |
376 | //\r | |
377 | ASSERT (FALSE);\r | |
378 | }\r | |
379 | \r | |
380 | /**\r | |
381 | Callback function for ExitBootServices.\r | |
382 | \r | |
383 | @param[in] Event Event whose notification function is being invoked.\r | |
384 | @param[in] Context The pointer to the notification function's context,\r | |
385 | which is implementation-dependent.\r | |
386 | \r | |
387 | **/\r | |
388 | VOID\r | |
389 | EFIAPI\r | |
86af2eb8 | 390 | MpInitChangeApLoopCallback (\r |
4d3314f6 JF |
391 | IN EFI_EVENT Event,\r |
392 | IN VOID *Context\r | |
393 | )\r | |
394 | {\r | |
395 | CPU_MP_DATA *CpuMpData;\r | |
5183fb37 | 396 | \r |
4d3314f6 JF |
397 | CpuMpData = GetCpuMpData ();\r |
398 | CpuMpData->PmCodeSegment = GetProtectedModeCS ();\r | |
7b7508ad | 399 | CpuMpData->Pm16CodeSegment = GetProtectedMode16CS ();\r |
4d3314f6 | 400 | CpuMpData->ApLoopMode = PcdGet8 (PcdCpuApLoopMode);\r |
9f91cb01 | 401 | mNumberToFinish = CpuMpData->CpuCount - 1;\r |
cf4e79e4 | 402 | WakeUpAP (CpuMpData, TRUE, 0, RelocateApLoop, NULL, TRUE);\r |
9f91cb01 JF |
403 | while (mNumberToFinish > 0) {\r |
404 | CpuPause ();\r | |
405 | }\r | |
20da7ca4 TL |
406 | \r |
407 | if (CpuMpData->SevEsIsEnabled && (CpuMpData->WakeupBuffer != (UINTN) -1)) {\r | |
408 | //\r | |
409 | // There are APs present. Re-use reserved memory area below 1MB from\r | |
410 | // WakeupBuffer as the area to be used for transitioning to 16-bit mode\r | |
411 | // in support of booting of the AP by an OS.\r | |
412 | //\r | |
413 | CopyMem (\r | |
414 | (VOID *) CpuMpData->WakeupBuffer,\r | |
415 | (VOID *) (CpuMpData->AddressMap.RendezvousFunnelAddress +\r | |
416 | CpuMpData->AddressMap.SwitchToRealPM16ModeOffset),\r | |
417 | CpuMpData->AddressMap.SwitchToRealPM16ModeSize\r | |
418 | );\r | |
419 | }\r | |
420 | \r | |
86af2eb8 | 421 | DEBUG ((DEBUG_INFO, "%a() done!\n", __FUNCTION__));\r |
4d3314f6 JF |
422 | }\r |
423 | \r | |
93ca4c0f JF |
424 | /**\r |
425 | Initialize global data for MP support.\r | |
426 | \r | |
427 | @param[in] CpuMpData The pointer to CPU MP Data structure.\r | |
428 | **/\r | |
429 | VOID\r | |
430 | InitMpGlobalData (\r | |
431 | IN CPU_MP_DATA *CpuMpData\r | |
432 | )\r | |
433 | {\r | |
15720a6c JW |
434 | EFI_STATUS Status;\r |
435 | EFI_PHYSICAL_ADDRESS Address;\r | |
436 | UINTN ApSafeBufferSize;\r | |
437 | UINTN Index;\r | |
438 | EFI_GCD_MEMORY_SPACE_DESCRIPTOR MemDesc;\r | |
439 | UINTN StackBase;\r | |
52315261 | 440 | CPU_INFO_IN_HOB *CpuInfoInHob;\r |
96378861 | 441 | \r |
93ca4c0f JF |
442 | SaveCpuMpData (CpuMpData);\r |
443 | \r | |
14e8137c JF |
444 | if (CpuMpData->CpuCount == 1) {\r |
445 | //\r | |
446 | // If only BSP exists, return\r | |
447 | //\r | |
448 | return;\r | |
449 | }\r | |
450 | \r | |
15720a6c JW |
451 | if (PcdGetBool (PcdCpuStackGuard)) {\r |
452 | //\r | |
453 | // One extra page at the bottom of the stack is needed for Guard page.\r | |
454 | //\r | |
455 | if (CpuMpData->CpuApStackSize <= EFI_PAGE_SIZE) {\r | |
456 | DEBUG ((DEBUG_ERROR, "PcdCpuApStackSize is not big enough for Stack Guard!\n"));\r | |
457 | ASSERT (FALSE);\r | |
458 | }\r | |
459 | \r | |
52315261 JW |
460 | //\r |
461 | // DXE will reuse stack allocated for APs at PEI phase if it's available.\r | |
462 | // Let's check it here.\r | |
463 | //\r | |
464 | // Note: BSP's stack guard is set at DxeIpl phase. But for the sake of\r | |
465 | // BSP/AP exchange, stack guard for ApTopOfStack of cpu 0 will still be\r | |
466 | // set here.\r | |
467 | //\r | |
468 | CpuInfoInHob = (CPU_INFO_IN_HOB *)(UINTN)CpuMpData->CpuInfoInHob;\r | |
15720a6c | 469 | for (Index = 0; Index < CpuMpData->CpuCount; ++Index) {\r |
52315261 | 470 | if (CpuInfoInHob != NULL && CpuInfoInHob[Index].ApTopOfStack != 0) {\r |
20737c2f | 471 | StackBase = (UINTN)CpuInfoInHob[Index].ApTopOfStack - CpuMpData->CpuApStackSize;\r |
52315261 JW |
472 | } else {\r |
473 | StackBase = CpuMpData->Buffer + Index * CpuMpData->CpuApStackSize;\r | |
474 | }\r | |
15720a6c JW |
475 | \r |
476 | Status = gDS->GetMemorySpaceDescriptor (StackBase, &MemDesc);\r | |
477 | ASSERT_EFI_ERROR (Status);\r | |
478 | \r | |
479 | Status = gDS->SetMemorySpaceAttributes (\r | |
480 | StackBase,\r | |
481 | EFI_PAGES_TO_SIZE (1),\r | |
482 | MemDesc.Attributes | EFI_MEMORY_RP\r | |
483 | );\r | |
484 | ASSERT_EFI_ERROR (Status);\r | |
52315261 JW |
485 | \r |
486 | DEBUG ((DEBUG_INFO, "Stack Guard set at %lx [cpu%lu]!\n",\r | |
487 | (UINT64)StackBase, (UINT64)Index));\r | |
15720a6c JW |
488 | }\r |
489 | }\r | |
490 | \r | |
5183fb37 | 491 | //\r |
ffd6b0b1 JF |
492 | // Avoid APs access invalid buffer data which allocated by BootServices,\r |
493 | // so we will allocate reserved data for AP loop code. We also need to\r | |
494 | // allocate this buffer below 4GB due to APs may be transferred to 32bit\r | |
495 | // protected mode on long mode DXE.\r | |
5183fb37 JF |
496 | // Allocating it in advance since memory services are not available in\r |
497 | // Exit Boot Services callback function.\r | |
498 | //\r | |
bc2288f5 JW |
499 | ApSafeBufferSize = EFI_PAGES_TO_SIZE (EFI_SIZE_TO_PAGES (\r |
500 | CpuMpData->AddressMap.RelocateApLoopFuncSize\r | |
501 | ));\r | |
ffd6b0b1 JF |
502 | Address = BASE_4GB - 1;\r |
503 | Status = gBS->AllocatePages (\r | |
504 | AllocateMaxAddress,\r | |
505 | EfiReservedMemoryType,\r | |
bf2786dc | 506 | EFI_SIZE_TO_PAGES (ApSafeBufferSize),\r |
ffd6b0b1 JF |
507 | &Address\r |
508 | );\r | |
509 | ASSERT_EFI_ERROR (Status);\r | |
bc2288f5 | 510 | \r |
ffd6b0b1 | 511 | mReservedApLoopFunc = (VOID *) (UINTN) Address;\r |
5183fb37 | 512 | ASSERT (mReservedApLoopFunc != NULL);\r |
bc2288f5 JW |
513 | \r |
514 | //\r | |
515 | // Make sure that the buffer memory is executable if NX protection is enabled\r | |
516 | // for EfiReservedMemoryType.\r | |
7367cc6c | 517 | //\r |
bc2288f5 JW |
518 | // TODO: Check EFI_MEMORY_XP bit set or not once it's available in DXE GCD\r |
519 | // service.\r | |
520 | //\r | |
521 | Status = gDS->GetMemorySpaceDescriptor (Address, &MemDesc);\r | |
522 | if (!EFI_ERROR (Status)) {\r | |
523 | gDS->SetMemorySpaceAttributes (\r | |
524 | Address,\r | |
525 | ApSafeBufferSize,\r | |
526 | MemDesc.Attributes & (~EFI_MEMORY_XP)\r | |
527 | );\r | |
528 | }\r | |
529 | \r | |
530 | ApSafeBufferSize = EFI_PAGES_TO_SIZE (EFI_SIZE_TO_PAGES (\r | |
531 | CpuMpData->CpuCount * AP_SAFE_STACK_SIZE\r | |
532 | ));\r | |
533 | Address = BASE_4GB - 1;\r | |
534 | Status = gBS->AllocatePages (\r | |
535 | AllocateMaxAddress,\r | |
536 | EfiReservedMemoryType,\r | |
537 | EFI_SIZE_TO_PAGES (ApSafeBufferSize),\r | |
538 | &Address\r | |
539 | );\r | |
540 | ASSERT_EFI_ERROR (Status);\r | |
541 | \r | |
542 | mReservedTopOfApStack = (UINTN) Address + ApSafeBufferSize;\r | |
bf2786dc | 543 | ASSERT ((mReservedTopOfApStack & (UINTN)(CPU_STACK_ALIGNMENT - 1)) == 0);\r |
ffd6b0b1 JF |
544 | CopyMem (\r |
545 | mReservedApLoopFunc,\r | |
546 | CpuMpData->AddressMap.RelocateApLoopFuncAddress,\r | |
547 | CpuMpData->AddressMap.RelocateApLoopFuncSize\r | |
548 | );\r | |
5183fb37 | 549 | \r |
96378861 JF |
550 | Status = gBS->CreateEvent (\r |
551 | EVT_TIMER | EVT_NOTIFY_SIGNAL,\r | |
552 | TPL_NOTIFY,\r | |
553 | CheckApsStatus,\r | |
554 | NULL,\r | |
555 | &mCheckAllApsEvent\r | |
556 | );\r | |
557 | ASSERT_EFI_ERROR (Status);\r | |
558 | \r | |
559 | //\r | |
560 | // Set timer to check all APs status.\r | |
561 | //\r | |
562 | Status = gBS->SetTimer (\r | |
563 | mCheckAllApsEvent,\r | |
564 | TimerPeriodic,\r | |
a1c35ff3 HW |
565 | EFI_TIMER_PERIOD_MICROSECONDS (\r |
566 | PcdGet32 (PcdCpuApStatusCheckIntervalInMicroSeconds)\r | |
567 | )\r | |
96378861 JF |
568 | );\r |
569 | ASSERT_EFI_ERROR (Status);\r | |
8677a56a | 570 | \r |
4d3314f6 JF |
571 | Status = gBS->CreateEvent (\r |
572 | EVT_SIGNAL_EXIT_BOOT_SERVICES,\r | |
573 | TPL_CALLBACK,\r | |
86af2eb8 | 574 | MpInitChangeApLoopCallback,\r |
4d3314f6 JF |
575 | NULL,\r |
576 | &mMpInitExitBootServicesEvent\r | |
577 | );\r | |
578 | ASSERT_EFI_ERROR (Status);\r | |
8677a56a JF |
579 | \r |
580 | Status = gBS->CreateEventEx (\r | |
581 | EVT_NOTIFY_SIGNAL,\r | |
582 | TPL_CALLBACK,\r | |
583 | MpInitChangeApLoopCallback,\r | |
584 | NULL,\r | |
585 | &gEfiEventLegacyBootGuid,\r | |
586 | &mLegacyBootEvent\r | |
587 | );\r | |
588 | ASSERT_EFI_ERROR (Status);\r | |
93ca4c0f | 589 | }\r |
3e8ad6bd JF |
590 | \r |
591 | /**\r | |
592 | This service executes a caller provided function on all enabled APs.\r | |
593 | \r | |
594 | @param[in] Procedure A pointer to the function to be run on\r | |
595 | enabled APs of the system. See type\r | |
596 | EFI_AP_PROCEDURE.\r | |
597 | @param[in] SingleThread If TRUE, then all the enabled APs execute\r | |
598 | the function specified by Procedure one by\r | |
599 | one, in ascending order of processor handle\r | |
600 | number. If FALSE, then all the enabled APs\r | |
601 | execute the function specified by Procedure\r | |
602 | simultaneously.\r | |
603 | @param[in] WaitEvent The event created by the caller with CreateEvent()\r | |
604 | service. If it is NULL, then execute in\r | |
605 | blocking mode. BSP waits until all APs finish\r | |
606 | or TimeoutInMicroSeconds expires. If it's\r | |
607 | not NULL, then execute in non-blocking mode.\r | |
608 | BSP requests the function specified by\r | |
609 | Procedure to be started on all the enabled\r | |
610 | APs, and go on executing immediately. If\r | |
611 | all return from Procedure, or TimeoutInMicroSeconds\r | |
612 | expires, this event is signaled. The BSP\r | |
613 | can use the CheckEvent() or WaitForEvent()\r | |
614 | services to check the state of event. Type\r | |
615 | EFI_EVENT is defined in CreateEvent() in\r | |
616 | the Unified Extensible Firmware Interface\r | |
617 | Specification.\r | |
367284e7 | 618 | @param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for\r |
3e8ad6bd JF |
619 | APs to return from Procedure, either for\r |
620 | blocking or non-blocking mode. Zero means\r | |
621 | infinity. If the timeout expires before\r | |
622 | all APs return from Procedure, then Procedure\r | |
623 | on the failed APs is terminated. All enabled\r | |
624 | APs are available for next function assigned\r | |
625 | by MpInitLibStartupAllAPs() or\r | |
626 | MPInitLibStartupThisAP().\r | |
627 | If the timeout expires in blocking mode,\r | |
628 | BSP returns EFI_TIMEOUT. If the timeout\r | |
629 | expires in non-blocking mode, WaitEvent\r | |
630 | is signaled with SignalEvent().\r | |
631 | @param[in] ProcedureArgument The parameter passed into Procedure for\r | |
632 | all APs.\r | |
633 | @param[out] FailedCpuList If NULL, this parameter is ignored. Otherwise,\r | |
634 | if all APs finish successfully, then its\r | |
635 | content is set to NULL. If not all APs\r | |
636 | finish before timeout expires, then its\r | |
637 | content is set to address of the buffer\r | |
638 | holding handle numbers of the failed APs.\r | |
639 | The buffer is allocated by MP Initialization\r | |
640 | library, and it's the caller's responsibility to\r | |
641 | free the buffer with FreePool() service.\r | |
642 | In blocking mode, it is ready for consumption\r | |
643 | when the call returns. In non-blocking mode,\r | |
644 | it is ready when WaitEvent is signaled. The\r | |
645 | list of failed CPU is terminated by\r | |
646 | END_OF_CPU_LIST.\r | |
647 | \r | |
648 | @retval EFI_SUCCESS In blocking mode, all APs have finished before\r | |
649 | the timeout expired.\r | |
650 | @retval EFI_SUCCESS In non-blocking mode, function has been dispatched\r | |
651 | to all enabled APs.\r | |
652 | @retval EFI_UNSUPPORTED A non-blocking mode request was made after the\r | |
653 | UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was\r | |
654 | signaled.\r | |
655 | @retval EFI_UNSUPPORTED WaitEvent is not NULL if non-blocking mode is not\r | |
656 | supported.\r | |
657 | @retval EFI_DEVICE_ERROR Caller processor is AP.\r | |
658 | @retval EFI_NOT_STARTED No enabled APs exist in the system.\r | |
659 | @retval EFI_NOT_READY Any enabled APs are busy.\r | |
660 | @retval EFI_NOT_READY MP Initialize Library is not initialized.\r | |
661 | @retval EFI_TIMEOUT In blocking mode, the timeout expired before\r | |
662 | all enabled APs have finished.\r | |
663 | @retval EFI_INVALID_PARAMETER Procedure is NULL.\r | |
664 | \r | |
665 | **/\r | |
666 | EFI_STATUS\r | |
667 | EFIAPI\r | |
668 | MpInitLibStartupAllAPs (\r | |
669 | IN EFI_AP_PROCEDURE Procedure,\r | |
670 | IN BOOLEAN SingleThread,\r | |
671 | IN EFI_EVENT WaitEvent OPTIONAL,\r | |
672 | IN UINTN TimeoutInMicroseconds,\r | |
673 | IN VOID *ProcedureArgument OPTIONAL,\r | |
674 | OUT UINTN **FailedCpuList OPTIONAL\r | |
675 | )\r | |
676 | {\r | |
86efe976 JF |
677 | EFI_STATUS Status;\r |
678 | \r | |
679 | //\r | |
680 | // Temporarily stop checkAllApsStatus for avoid resource dead-lock.\r | |
681 | //\r | |
682 | mStopCheckAllApsStatus = TRUE;\r | |
683 | \r | |
ee0c39fa | 684 | Status = StartupAllCPUsWorker (\r |
86efe976 JF |
685 | Procedure,\r |
686 | SingleThread,\r | |
ee0c39fa | 687 | TRUE,\r |
86efe976 JF |
688 | WaitEvent,\r |
689 | TimeoutInMicroseconds,\r | |
690 | ProcedureArgument,\r | |
691 | FailedCpuList\r | |
692 | );\r | |
693 | \r | |
694 | //\r | |
695 | // Start checkAllApsStatus\r | |
696 | //\r | |
697 | mStopCheckAllApsStatus = FALSE;\r | |
698 | \r | |
699 | return Status;\r | |
3e8ad6bd JF |
700 | }\r |
701 | \r | |
702 | /**\r | |
703 | This service lets the caller get one enabled AP to execute a caller-provided\r | |
704 | function.\r | |
705 | \r | |
706 | @param[in] Procedure A pointer to the function to be run on the\r | |
707 | designated AP of the system. See type\r | |
708 | EFI_AP_PROCEDURE.\r | |
709 | @param[in] ProcessorNumber The handle number of the AP. The range is\r | |
710 | from 0 to the total number of logical\r | |
711 | processors minus 1. The total number of\r | |
712 | logical processors can be retrieved by\r | |
713 | MpInitLibGetNumberOfProcessors().\r | |
714 | @param[in] WaitEvent The event created by the caller with CreateEvent()\r | |
715 | service. If it is NULL, then execute in\r | |
716 | blocking mode. BSP waits until this AP finish\r | |
717 | or TimeoutInMicroSeconds expires. If it's\r | |
718 | not NULL, then execute in non-blocking mode.\r | |
719 | BSP requests the function specified by\r | |
720 | Procedure to be started on this AP,\r | |
721 | and go on executing immediately. If this AP\r | |
722 | return from Procedure or TimeoutInMicroSeconds\r | |
723 | expires, this event is signaled. The BSP\r | |
724 | can use the CheckEvent() or WaitForEvent()\r | |
725 | services to check the state of event. Type\r | |
726 | EFI_EVENT is defined in CreateEvent() in\r | |
727 | the Unified Extensible Firmware Interface\r | |
728 | Specification.\r | |
367284e7 | 729 | @param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for\r |
3e8ad6bd JF |
730 | this AP to finish this Procedure, either for\r |
731 | blocking or non-blocking mode. Zero means\r | |
732 | infinity. If the timeout expires before\r | |
733 | this AP returns from Procedure, then Procedure\r | |
734 | on the AP is terminated. The\r | |
735 | AP is available for next function assigned\r | |
736 | by MpInitLibStartupAllAPs() or\r | |
737 | MpInitLibStartupThisAP().\r | |
738 | If the timeout expires in blocking mode,\r | |
739 | BSP returns EFI_TIMEOUT. If the timeout\r | |
740 | expires in non-blocking mode, WaitEvent\r | |
741 | is signaled with SignalEvent().\r | |
742 | @param[in] ProcedureArgument The parameter passed into Procedure on the\r | |
743 | specified AP.\r | |
744 | @param[out] Finished If NULL, this parameter is ignored. In\r | |
745 | blocking mode, this parameter is ignored.\r | |
746 | In non-blocking mode, if AP returns from\r | |
747 | Procedure before the timeout expires, its\r | |
748 | content is set to TRUE. Otherwise, the\r | |
749 | value is set to FALSE. The caller can\r | |
750 | determine if the AP returned from Procedure\r | |
751 | by evaluating this value.\r | |
752 | \r | |
753 | @retval EFI_SUCCESS In blocking mode, specified AP finished before\r | |
754 | the timeout expires.\r | |
755 | @retval EFI_SUCCESS In non-blocking mode, the function has been\r | |
756 | dispatched to specified AP.\r | |
757 | @retval EFI_UNSUPPORTED A non-blocking mode request was made after the\r | |
758 | UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was\r | |
759 | signaled.\r | |
760 | @retval EFI_UNSUPPORTED WaitEvent is not NULL if non-blocking mode is not\r | |
761 | supported.\r | |
762 | @retval EFI_DEVICE_ERROR The calling processor is an AP.\r | |
763 | @retval EFI_TIMEOUT In blocking mode, the timeout expired before\r | |
764 | the specified AP has finished.\r | |
765 | @retval EFI_NOT_READY The specified AP is busy.\r | |
766 | @retval EFI_NOT_READY MP Initialize Library is not initialized.\r | |
767 | @retval EFI_NOT_FOUND The processor with the handle specified by\r | |
768 | ProcessorNumber does not exist.\r | |
769 | @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP or disabled AP.\r | |
770 | @retval EFI_INVALID_PARAMETER Procedure is NULL.\r | |
771 | \r | |
772 | **/\r | |
773 | EFI_STATUS\r | |
774 | EFIAPI\r | |
775 | MpInitLibStartupThisAP (\r | |
776 | IN EFI_AP_PROCEDURE Procedure,\r | |
777 | IN UINTN ProcessorNumber,\r | |
778 | IN EFI_EVENT WaitEvent OPTIONAL,\r | |
779 | IN UINTN TimeoutInMicroseconds,\r | |
780 | IN VOID *ProcedureArgument OPTIONAL,\r | |
781 | OUT BOOLEAN *Finished OPTIONAL\r | |
782 | )\r | |
783 | {\r | |
20ae5774 JF |
784 | EFI_STATUS Status;\r |
785 | \r | |
786 | //\r | |
787 | // temporarily stop checkAllApsStatus for avoid resource dead-lock.\r | |
788 | //\r | |
789 | mStopCheckAllApsStatus = TRUE;\r | |
790 | \r | |
791 | Status = StartupThisAPWorker (\r | |
792 | Procedure,\r | |
793 | ProcessorNumber,\r | |
794 | WaitEvent,\r | |
795 | TimeoutInMicroseconds,\r | |
796 | ProcedureArgument,\r | |
797 | Finished\r | |
798 | );\r | |
799 | \r | |
800 | mStopCheckAllApsStatus = FALSE;\r | |
801 | \r | |
802 | return Status;\r | |
3e8ad6bd JF |
803 | }\r |
804 | \r | |
805 | /**\r | |
806 | This service switches the requested AP to be the BSP from that point onward.\r | |
807 | This service changes the BSP for all purposes. This call can only be performed\r | |
808 | by the current BSP.\r | |
809 | \r | |
810 | @param[in] ProcessorNumber The handle number of AP that is to become the new\r | |
811 | BSP. The range is from 0 to the total number of\r | |
812 | logical processors minus 1. The total number of\r | |
813 | logical processors can be retrieved by\r | |
814 | MpInitLibGetNumberOfProcessors().\r | |
815 | @param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an\r | |
816 | enabled AP. Otherwise, it will be disabled.\r | |
817 | \r | |
818 | @retval EFI_SUCCESS BSP successfully switched.\r | |
819 | @retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to\r | |
820 | this service returning.\r | |
821 | @retval EFI_UNSUPPORTED Switching the BSP is not supported.\r | |
822 | @retval EFI_DEVICE_ERROR The calling processor is an AP.\r | |
823 | @retval EFI_NOT_FOUND The processor with the handle specified by\r | |
824 | ProcessorNumber does not exist.\r | |
825 | @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or\r | |
826 | a disabled AP.\r | |
827 | @retval EFI_NOT_READY The specified AP is busy.\r | |
828 | @retval EFI_NOT_READY MP Initialize Library is not initialized.\r | |
829 | \r | |
830 | **/\r | |
831 | EFI_STATUS\r | |
832 | EFIAPI\r | |
833 | MpInitLibSwitchBSP (\r | |
834 | IN UINTN ProcessorNumber,\r | |
835 | IN BOOLEAN EnableOldBSP\r | |
836 | )\r | |
837 | {\r | |
b6e45716 JF |
838 | EFI_STATUS Status;\r |
839 | EFI_TIMER_ARCH_PROTOCOL *Timer;\r | |
840 | UINT64 TimerPeriod;\r | |
41be0da5 | 841 | \r |
8ad05bd2 | 842 | TimerPeriod = 0;\r |
b6e45716 JF |
843 | //\r |
844 | // Locate Timer Arch Protocol\r | |
845 | //\r | |
846 | Status = gBS->LocateProtocol (&gEfiTimerArchProtocolGuid, NULL, (VOID **) &Timer);\r | |
847 | if (EFI_ERROR (Status)) {\r | |
848 | Timer = NULL;\r | |
849 | }\r | |
850 | \r | |
851 | if (Timer != NULL) {\r | |
852 | //\r | |
853 | // Save current rate of DXE Timer\r | |
854 | //\r | |
855 | Timer->GetTimerPeriod (Timer, &TimerPeriod);\r | |
856 | //\r | |
857 | // Disable DXE Timer and drain pending interrupts\r | |
858 | //\r | |
859 | Timer->SetTimerPeriod (Timer, 0);\r | |
860 | }\r | |
41be0da5 JF |
861 | \r |
862 | Status = SwitchBSPWorker (ProcessorNumber, EnableOldBSP);\r | |
863 | \r | |
b6e45716 JF |
864 | if (Timer != NULL) {\r |
865 | //\r | |
866 | // Enable and restore rate of DXE Timer\r | |
867 | //\r | |
868 | Timer->SetTimerPeriod (Timer, TimerPeriod);\r | |
869 | }\r | |
870 | \r | |
41be0da5 | 871 | return Status;\r |
3e8ad6bd JF |
872 | }\r |
873 | \r | |
874 | /**\r | |
875 | This service lets the caller enable or disable an AP from this point onward.\r | |
876 | This service may only be called from the BSP.\r | |
877 | \r | |
878 | @param[in] ProcessorNumber The handle number of AP.\r | |
879 | The range is from 0 to the total number of\r | |
880 | logical processors minus 1. The total number of\r | |
881 | logical processors can be retrieved by\r | |
882 | MpInitLibGetNumberOfProcessors().\r | |
883 | @param[in] EnableAP Specifies the new state for the processor for\r | |
884 | enabled, FALSE for disabled.\r | |
885 | @param[in] HealthFlag If not NULL, a pointer to a value that specifies\r | |
886 | the new health status of the AP. This flag\r | |
887 | corresponds to StatusFlag defined in\r | |
888 | EFI_MP_SERVICES_PROTOCOL.GetProcessorInfo(). Only\r | |
889 | the PROCESSOR_HEALTH_STATUS_BIT is used. All other\r | |
890 | bits are ignored. If it is NULL, this parameter\r | |
891 | is ignored.\r | |
892 | \r | |
893 | @retval EFI_SUCCESS The specified AP was enabled or disabled successfully.\r | |
894 | @retval EFI_UNSUPPORTED Enabling or disabling an AP cannot be completed\r | |
895 | prior to this service returning.\r | |
896 | @retval EFI_UNSUPPORTED Enabling or disabling an AP is not supported.\r | |
897 | @retval EFI_DEVICE_ERROR The calling processor is an AP.\r | |
898 | @retval EFI_NOT_FOUND Processor with the handle specified by ProcessorNumber\r | |
899 | does not exist.\r | |
900 | @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP.\r | |
901 | @retval EFI_NOT_READY MP Initialize Library is not initialized.\r | |
902 | \r | |
903 | **/\r | |
904 | EFI_STATUS\r | |
905 | EFIAPI\r | |
906 | MpInitLibEnableDisableAP (\r | |
907 | IN UINTN ProcessorNumber,\r | |
908 | IN BOOLEAN EnableAP,\r | |
909 | IN UINT32 *HealthFlag OPTIONAL\r | |
910 | )\r | |
911 | {\r | |
e37109bc JF |
912 | EFI_STATUS Status;\r |
913 | BOOLEAN TempStopCheckState;\r | |
914 | \r | |
915 | TempStopCheckState = FALSE;\r | |
916 | //\r | |
917 | // temporarily stop checkAllAPsStatus for initialize parameters.\r | |
918 | //\r | |
919 | if (!mStopCheckAllApsStatus) {\r | |
920 | mStopCheckAllApsStatus = TRUE;\r | |
921 | TempStopCheckState = TRUE;\r | |
922 | }\r | |
923 | \r | |
924 | Status = EnableDisableApWorker (ProcessorNumber, EnableAP, HealthFlag);\r | |
925 | \r | |
926 | if (TempStopCheckState) {\r | |
927 | mStopCheckAllApsStatus = FALSE;\r | |
928 | }\r | |
929 | \r | |
930 | return Status;\r | |
3e8ad6bd | 931 | }\r |
c788c2b1 SF |
932 | \r |
933 | /**\r | |
934 | This funtion will try to invoke platform specific microcode shadow logic to\r | |
935 | relocate microcode update patches into memory.\r | |
936 | \r | |
4ac82ea1 | 937 | @param[in, out] CpuMpData The pointer to CPU MP Data structure.\r |
c788c2b1 SF |
938 | \r |
939 | @retval EFI_SUCCESS Shadow microcode success.\r | |
940 | @retval EFI_OUT_OF_RESOURCES No enough resource to complete the operation.\r | |
941 | @retval EFI_UNSUPPORTED Can't find platform specific microcode shadow\r | |
942 | PPI/Protocol.\r | |
943 | **/\r | |
944 | EFI_STATUS\r | |
945 | PlatformShadowMicrocode (\r | |
946 | IN OUT CPU_MP_DATA *CpuMpData\r | |
947 | )\r | |
948 | {\r | |
949 | //\r | |
950 | // There is no DXE version of platform shadow microcode protocol so far.\r | |
951 | // A platform which only uses DxeMpInitLib instance could only supports\r | |
952 | // the PCD based microcode shadowing.\r | |
953 | //\r | |
954 | return EFI_UNSUPPORTED;\r | |
955 | }\r |