1 /** @file 2 Common header file for MP Initialize Library. 3 4 Copyright (c) 2016 - 2020, Intel Corporation. All rights reserved.<BR> 5 Copyright (c) 2020, AMD Inc. All rights reserved.<BR> 6 7 SPDX-License-Identifier: BSD-2-Clause-Patent 8 9 **/ 10 11 #ifndef _MP_LIB_H_ 12 #define _MP_LIB_H_ 13 14 #include <PiPei.h> 15 16 #include <Register/Intel/Cpuid.h> 17 #include <Register/Amd/Cpuid.h> 18 #include <Register/Intel/Msr.h> 19 #include <Register/Intel/LocalApic.h> 20 #include <Register/Intel/Microcode.h> 21 22 #include <Library/MpInitLib.h> 23 #include <Library/BaseLib.h> 24 #include <Library/BaseMemoryLib.h> 25 #include <Library/MemoryAllocationLib.h> 26 #include <Library/DebugLib.h> 27 #include <Library/LocalApicLib.h> 28 #include <Library/CpuLib.h> 29 #include <Library/UefiCpuLib.h> 30 #include <Library/TimerLib.h> 31 #include <Library/SynchronizationLib.h> 32 #include <Library/MtrrLib.h> 33 #include <Library/HobLib.h> 34 #include <Library/PcdLib.h> 35 36 #include <Guid/MicrocodePatchHob.h> 37 38 #define WAKEUP_AP_SIGNAL SIGNATURE_32 ('S', 'T', 'A', 'P') 39 40 #define CPU_INIT_MP_LIB_HOB_GUID \ 41 { \ 42 0x58eb6a19, 0x3699, 0x4c68, { 0xa8, 0x36, 0xda, 0xcd, 0x8e, 0xdc, 0xad, 0x4a } \ 43 } 44 45 // 46 // The MP data for switch BSP 47 // 48 #define CPU_SWITCH_STATE_IDLE 0 49 #define CPU_SWITCH_STATE_STORED 1 50 #define CPU_SWITCH_STATE_LOADED 2 51 52 // 53 // Default maximum number of entries to store the microcode patches information 54 // 55 #define DEFAULT_MAX_MICROCODE_PATCH_NUM 8 56 57 // 58 // Data structure for microcode patch information 59 // 60 typedef struct { 61 UINTN Address; 62 UINTN Size; 63 } MICROCODE_PATCH_INFO; 64 65 // 66 // CPU exchange information for switch BSP 67 // 68 typedef struct { 69 UINT8 State; // offset 0 70 UINTN StackPointer; // offset 4 / 8 71 IA32_DESCRIPTOR Gdtr; // offset 8 / 16 72 IA32_DESCRIPTOR Idtr; // offset 14 / 26 73 } CPU_EXCHANGE_ROLE_INFO; 74 75 // 76 // AP loop state when APs are in idle state 77 // It's value is the same with PcdCpuApLoopMode 78 // 79 typedef enum { 80 ApInHltLoop = 1, 81 ApInMwaitLoop = 2, 82 ApInRunLoop = 3 83 } AP_LOOP_MODE; 84 85 // 86 // AP initialization state during APs wakeup 87 // 88 typedef enum { 89 ApInitConfig = 1, 90 ApInitReconfig = 2, 91 ApInitDone = 3 92 } AP_INIT_STATE; 93 94 // 95 // AP state 96 // 97 // The state transitions for an AP when it process a procedure are: 98 // Idle ----> Ready ----> Busy ----> Idle 99 // [BSP] [AP] [AP] 100 // 101 typedef enum { 102 CpuStateIdle, 103 CpuStateReady, 104 CpuStateBusy, 105 CpuStateFinished, 106 CpuStateDisabled 107 } CPU_STATE; 108 109 // 110 // CPU volatile registers around INIT-SIPI-SIPI 111 // 112 typedef struct { 113 UINTN Cr0; 114 UINTN Cr3; 115 UINTN Cr4; 116 UINTN Dr0; 117 UINTN Dr1; 118 UINTN Dr2; 119 UINTN Dr3; 120 UINTN Dr6; 121 UINTN Dr7; 122 IA32_DESCRIPTOR Gdtr; 123 IA32_DESCRIPTOR Idtr; 124 UINT16 Tr; 125 } CPU_VOLATILE_REGISTERS; 126 127 // 128 // AP related data 129 // 130 typedef struct { 131 SPIN_LOCK ApLock; 132 volatile UINT32 *StartupApSignal; 133 volatile UINTN ApFunction; 134 volatile UINTN ApFunctionArgument; 135 BOOLEAN CpuHealthy; 136 volatile CPU_STATE State; 137 CPU_VOLATILE_REGISTERS VolatileRegisters; 138 BOOLEAN Waiting; 139 BOOLEAN *Finished; 140 UINT64 ExpectedTime; 141 UINT64 CurrentTime; 142 UINT64 TotalTime; 143 EFI_EVENT WaitEvent; 144 UINT32 ProcessorSignature; 145 UINT8 PlatformId; 146 UINT64 MicrocodeEntryAddr; 147 } CPU_AP_DATA; 148 149 // 150 // Basic CPU information saved in Guided HOB. 151 // Because the contents will be shard between PEI and DXE, 152 // we need to make sure the each fields offset same in different 153 // architecture. 154 // 155 #pragma pack (1) 156 typedef struct { 157 UINT32 InitialApicId; 158 UINT32 ApicId; 159 UINT32 Health; 160 UINT64 ApTopOfStack; 161 } CPU_INFO_IN_HOB; 162 #pragma pack () 163 164 // 165 // AP reset code information including code address and size, 166 // this structure will be shared be C code and assembly code. 167 // It is natural aligned by design. 168 // 169 typedef struct { 170 UINT8 *RendezvousFunnelAddress; 171 UINTN ModeEntryOffset; 172 UINTN RendezvousFunnelSize; 173 UINT8 *RelocateApLoopFuncAddress; 174 UINTN RelocateApLoopFuncSize; 175 UINTN ModeTransitionOffset; 176 UINTN SwitchToRealSize; 177 UINTN SwitchToRealOffset; 178 UINTN SwitchToRealNoNxOffset; 179 UINTN SwitchToRealPM16ModeOffset; 180 UINTN SwitchToRealPM16ModeSize; 181 } MP_ASSEMBLY_ADDRESS_MAP; 182 183 typedef struct _CPU_MP_DATA CPU_MP_DATA; 184 185 #pragma pack(1) 186 187 // 188 // MP CPU exchange information for AP reset code 189 // This structure is required to be packed because fixed field offsets 190 // into this structure are used in assembly code in this module 191 // 192 typedef struct { 193 UINTN Lock; 194 UINTN StackStart; 195 UINTN StackSize; 196 UINTN CFunction; 197 IA32_DESCRIPTOR GdtrProfile; 198 IA32_DESCRIPTOR IdtrProfile; 199 UINTN BufferStart; 200 UINTN ModeOffset; 201 UINTN ApIndex; 202 UINTN CodeSegment; 203 UINTN DataSegment; 204 UINTN EnableExecuteDisable; 205 UINTN Cr3; 206 UINTN InitFlag; 207 CPU_INFO_IN_HOB *CpuInfo; 208 UINTN NumApsExecuting; 209 CPU_MP_DATA *CpuMpData; 210 UINTN InitializeFloatingPointUnitsAddress; 211 UINT32 ModeTransitionMemory; 212 UINT16 ModeTransitionSegment; 213 UINT32 ModeHighMemory; 214 UINT16 ModeHighSegment; 215 // 216 // Enable5LevelPaging indicates whether 5-level paging is enabled in long mode. 217 // 218 BOOLEAN Enable5LevelPaging; 219 BOOLEAN SevEsIsEnabled; 220 UINTN GhcbBase; 221 } MP_CPU_EXCHANGE_INFO; 222 223 #pragma pack() 224 225 // 226 // CPU MP Data save in memory 227 // 228 struct _CPU_MP_DATA { 229 UINT64 CpuInfoInHob; 230 UINT32 CpuCount; 231 UINT32 BspNumber; 232 // 233 // The above fields data will be passed from PEI to DXE 234 // Please make sure the fields offset same in the different 235 // architecture. 236 // 237 SPIN_LOCK MpLock; 238 UINTN Buffer; 239 UINTN CpuApStackSize; 240 MP_ASSEMBLY_ADDRESS_MAP AddressMap; 241 UINTN WakeupBuffer; 242 UINTN WakeupBufferHigh; 243 UINTN BackupBuffer; 244 UINTN BackupBufferSize; 245 246 volatile UINT32 FinishedCount; 247 UINT32 RunningCount; 248 BOOLEAN SingleThread; 249 EFI_AP_PROCEDURE Procedure; 250 VOID *ProcArguments; 251 BOOLEAN *Finished; 252 UINT64 ExpectedTime; 253 UINT64 CurrentTime; 254 UINT64 TotalTime; 255 EFI_EVENT WaitEvent; 256 UINTN **FailedCpuList; 257 258 AP_INIT_STATE InitFlag; 259 BOOLEAN SwitchBspFlag; 260 UINTN NewBspNumber; 261 CPU_EXCHANGE_ROLE_INFO BSPInfo; 262 CPU_EXCHANGE_ROLE_INFO APInfo; 263 MTRR_SETTINGS MtrrTable; 264 UINT8 ApLoopMode; 265 UINT8 ApTargetCState; 266 UINT16 PmCodeSegment; 267 UINT16 Pm16CodeSegment; 268 CPU_AP_DATA *CpuData; 269 volatile MP_CPU_EXCHANGE_INFO *MpCpuExchangeInfo; 270 271 UINT32 CurrentTimerCount; 272 UINTN DivideValue; 273 UINT8 Vector; 274 BOOLEAN PeriodicMode; 275 BOOLEAN TimerInterruptState; 276 UINT64 MicrocodePatchAddress; 277 UINT64 MicrocodePatchRegionSize; 278 279 // 280 // Whether need to use Init-Sipi-Sipi to wake up the APs. 281 // Two cases need to set this value to TRUE. One is in HLT 282 // loop mode, the other is resume from S3 which loop mode 283 // will be hardcode change to HLT mode by PiSmmCpuDxeSmm 284 // driver. 285 // 286 BOOLEAN WakeUpByInitSipiSipi; 287 288 BOOLEAN SevEsIsEnabled; 289 UINTN SevEsAPBuffer; 290 UINTN SevEsAPResetStackStart; 291 CPU_MP_DATA *NewCpuMpData; 292 293 UINT64 GhcbBase; 294 }; 295 296 #define AP_SAFE_STACK_SIZE 128 297 #define AP_RESET_STACK_SIZE AP_SAFE_STACK_SIZE 298 299 #pragma pack(1) 300 301 typedef struct { 302 UINT8 InsnBuffer[8]; 303 UINT16 Rip; 304 UINT16 Segment; 305 } SEV_ES_AP_JMP_FAR; 306 307 #pragma pack() 308 309 /** 310 Assembly code to move an AP from long mode to real mode. 311 312 Move an AP from long mode to real mode in preparation to invoking 313 the reset vector. This is used for SEV-ES guests where a hypervisor 314 is not allowed to set the CS and RIP to point to the reset vector. 315 316 @param[in] BufferStart The reset vector target. 317 @param[in] Code16 16-bit protected mode code segment value. 318 @param[in] Code32 32-bit protected mode code segment value. 319 @param[in] StackStart The start of a stack to be used for transitioning 320 from long mode to real mode. 321 **/ 322 typedef 323 VOID 324 (EFIAPI AP_RESET) ( 325 IN UINTN BufferStart, 326 IN UINT16 Code16, 327 IN UINT16 Code32, 328 IN UINTN StackStart 329 ); 330 331 extern EFI_GUID mCpuInitMpLibHobGuid; 332 333 /** 334 Assembly code to place AP into safe loop mode. 335 336 Place AP into targeted C-State if MONITOR is supported, otherwise 337 place AP into hlt state. 338 Place AP in protected mode if the current is long mode. Due to AP maybe 339 wakeup by some hardware event. It could avoid accessing page table that 340 may not available during booting to OS. 341 342 @param[in] MwaitSupport TRUE indicates MONITOR is supported. 343 FALSE indicates MONITOR is not supported. 344 @param[in] ApTargetCState Target C-State value. 345 @param[in] PmCodeSegment Protected mode code segment value. 346 **/ 347 typedef 348 VOID 349 (EFIAPI * ASM_RELOCATE_AP_LOOP) ( 350 IN BOOLEAN MwaitSupport, 351 IN UINTN ApTargetCState, 352 IN UINTN PmCodeSegment, 353 IN UINTN TopOfApStack, 354 IN UINTN NumberToFinish, 355 IN UINTN Pm16CodeSegment, 356 IN UINTN SevEsAPJumpTable, 357 IN UINTN WakeupBuffer 358 ); 359 360 /** 361 Assembly code to get starting address and size of the rendezvous entry for APs. 362 Information for fixing a jump instruction in the code is also returned. 363 364 @param[out] AddressMap Output buffer for address map information. 365 **/ 366 VOID 367 EFIAPI 368 AsmGetAddressMap ( 369 OUT MP_ASSEMBLY_ADDRESS_MAP *AddressMap 370 ); 371 372 /** 373 This function is called by both the BSP and the AP which is to become the BSP to 374 Exchange execution context including stack between them. After return from this 375 function, the BSP becomes AP and the AP becomes the BSP. 376 377 @param[in] MyInfo Pointer to buffer holding the exchanging information for the executing processor. 378 @param[in] OthersInfo Pointer to buffer holding the exchanging information for the peer. 379 380 **/ 381 VOID 382 EFIAPI 383 AsmExchangeRole ( 384 IN CPU_EXCHANGE_ROLE_INFO *MyInfo, 385 IN CPU_EXCHANGE_ROLE_INFO *OthersInfo 386 ); 387 388 /** 389 Get the pointer to CPU MP Data structure. 390 391 @return The pointer to CPU MP Data structure. 392 **/ 393 CPU_MP_DATA * 394 GetCpuMpData ( 395 VOID 396 ); 397 398 /** 399 Save the pointer to CPU MP Data structure. 400 401 @param[in] CpuMpData The pointer to CPU MP Data structure will be saved. 402 **/ 403 VOID 404 SaveCpuMpData ( 405 IN CPU_MP_DATA *CpuMpData 406 ); 407 408 409 /** 410 Get available system memory below 1MB by specified size. 411 412 @param[in] WakeupBufferSize Wakeup buffer size required 413 414 @retval other Return wakeup buffer address below 1MB. 415 @retval -1 Cannot find free memory below 1MB. 416 **/ 417 UINTN 418 GetWakeupBuffer ( 419 IN UINTN WakeupBufferSize 420 ); 421 422 /** 423 Get available EfiBootServicesCode memory below 4GB by specified size. 424 425 This buffer is required to safely transfer AP from real address mode to 426 protected mode or long mode, due to the fact that the buffer returned by 427 GetWakeupBuffer() may be marked as non-executable. 428 429 @param[in] BufferSize Wakeup transition buffer size. 430 431 @retval other Return wakeup transition buffer address below 4GB. 432 @retval 0 Cannot find free memory below 4GB. 433 **/ 434 UINTN 435 GetModeTransitionBuffer ( 436 IN UINTN BufferSize 437 ); 438 439 /** 440 Return the address of the SEV-ES AP jump table. 441 442 This buffer is required in order for an SEV-ES guest to transition from 443 UEFI into an OS. 444 445 @return Return SEV-ES AP jump table buffer 446 **/ 447 UINTN 448 GetSevEsAPMemory ( 449 VOID 450 ); 451 452 /** 453 This function will be called by BSP to wakeup AP. 454 455 @param[in] CpuMpData Pointer to CPU MP Data 456 @param[in] Broadcast TRUE: Send broadcast IPI to all APs 457 FALSE: Send IPI to AP by ApicId 458 @param[in] ProcessorNumber The handle number of specified processor 459 @param[in] Procedure The function to be invoked by AP 460 @param[in] ProcedureArgument The argument to be passed into AP function 461 @param[in] WakeUpDisabledAps Whether need to wake up disabled APs in broadcast mode. 462 **/ 463 VOID 464 WakeUpAP ( 465 IN CPU_MP_DATA *CpuMpData, 466 IN BOOLEAN Broadcast, 467 IN UINTN ProcessorNumber, 468 IN EFI_AP_PROCEDURE Procedure, OPTIONAL 469 IN VOID *ProcedureArgument, OPTIONAL 470 IN BOOLEAN WakeUpDisabledAps OPTIONAL 471 ); 472 473 /** 474 Initialize global data for MP support. 475 476 @param[in] CpuMpData The pointer to CPU MP Data structure. 477 **/ 478 VOID 479 InitMpGlobalData ( 480 IN CPU_MP_DATA *CpuMpData 481 ); 482 483 /** 484 Worker function to execute a caller provided function on all enabled APs. 485 486 @param[in] Procedure A pointer to the function to be run on 487 enabled APs of the system. 488 @param[in] SingleThread If TRUE, then all the enabled APs execute 489 the function specified by Procedure one by 490 one, in ascending order of processor handle 491 number. If FALSE, then all the enabled APs 492 execute the function specified by Procedure 493 simultaneously. 494 @param[in] ExcludeBsp Whether let BSP also trig this task. 495 @param[in] WaitEvent The event created by the caller with CreateEvent() 496 service. 497 @param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for 498 APs to return from Procedure, either for 499 blocking or non-blocking mode. 500 @param[in] ProcedureArgument The parameter passed into Procedure for 501 all APs. 502 @param[out] FailedCpuList If all APs finish successfully, then its 503 content is set to NULL. If not all APs 504 finish before timeout expires, then its 505 content is set to address of the buffer 506 holding handle numbers of the failed APs. 507 508 @retval EFI_SUCCESS In blocking mode, all APs have finished before 509 the timeout expired. 510 @retval EFI_SUCCESS In non-blocking mode, function has been dispatched 511 to all enabled APs. 512 @retval others Failed to Startup all APs. 513 514 **/ 515 EFI_STATUS 516 StartupAllCPUsWorker ( 517 IN EFI_AP_PROCEDURE Procedure, 518 IN BOOLEAN SingleThread, 519 IN BOOLEAN ExcludeBsp, 520 IN EFI_EVENT WaitEvent OPTIONAL, 521 IN UINTN TimeoutInMicroseconds, 522 IN VOID *ProcedureArgument OPTIONAL, 523 OUT UINTN **FailedCpuList OPTIONAL 524 ); 525 526 /** 527 Worker function to let the caller get one enabled AP to execute a caller-provided 528 function. 529 530 @param[in] Procedure A pointer to the function to be run on 531 enabled APs of the system. 532 @param[in] ProcessorNumber The handle number of the AP. 533 @param[in] WaitEvent The event created by the caller with CreateEvent() 534 service. 535 @param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for 536 APs to return from Procedure, either for 537 blocking or non-blocking mode. 538 @param[in] ProcedureArgument The parameter passed into Procedure for 539 all APs. 540 @param[out] Finished If AP returns from Procedure before the 541 timeout expires, its content is set to TRUE. 542 Otherwise, the value is set to FALSE. 543 544 @retval EFI_SUCCESS In blocking mode, specified AP finished before 545 the timeout expires. 546 @retval others Failed to Startup AP. 547 548 **/ 549 EFI_STATUS 550 StartupThisAPWorker ( 551 IN EFI_AP_PROCEDURE Procedure, 552 IN UINTN ProcessorNumber, 553 IN EFI_EVENT WaitEvent OPTIONAL, 554 IN UINTN TimeoutInMicroseconds, 555 IN VOID *ProcedureArgument OPTIONAL, 556 OUT BOOLEAN *Finished OPTIONAL 557 ); 558 559 /** 560 Worker function to switch the requested AP to be the BSP from that point onward. 561 562 @param[in] ProcessorNumber The handle number of AP that is to become the new BSP. 563 @param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an 564 enabled AP. Otherwise, it will be disabled. 565 566 @retval EFI_SUCCESS BSP successfully switched. 567 @retval others Failed to switch BSP. 568 569 **/ 570 EFI_STATUS 571 SwitchBSPWorker ( 572 IN UINTN ProcessorNumber, 573 IN BOOLEAN EnableOldBSP 574 ); 575 576 /** 577 Worker function to let the caller enable or disable an AP from this point onward. 578 This service may only be called from the BSP. 579 580 @param[in] ProcessorNumber The handle number of AP. 581 @param[in] EnableAP Specifies the new state for the processor for 582 enabled, FALSE for disabled. 583 @param[in] HealthFlag If not NULL, a pointer to a value that specifies 584 the new health status of the AP. 585 586 @retval EFI_SUCCESS The specified AP was enabled or disabled successfully. 587 @retval others Failed to Enable/Disable AP. 588 589 **/ 590 EFI_STATUS 591 EnableDisableApWorker ( 592 IN UINTN ProcessorNumber, 593 IN BOOLEAN EnableAP, 594 IN UINT32 *HealthFlag OPTIONAL 595 ); 596 597 /** 598 Get pointer to CPU MP Data structure from GUIDed HOB. 599 600 @return The pointer to CPU MP Data structure. 601 **/ 602 CPU_MP_DATA * 603 GetCpuMpDataFromGuidedHob ( 604 VOID 605 ); 606 607 /** Checks status of specified AP. 608 609 This function checks whether the specified AP has finished the task assigned 610 by StartupThisAP(), and whether timeout expires. 611 612 @param[in] ProcessorNumber The handle number of processor. 613 614 @retval EFI_SUCCESS Specified AP has finished task assigned by StartupThisAPs(). 615 @retval EFI_TIMEOUT The timeout expires. 616 @retval EFI_NOT_READY Specified AP has not finished task and timeout has not expired. 617 **/ 618 EFI_STATUS 619 CheckThisAP ( 620 IN UINTN ProcessorNumber 621 ); 622 623 /** 624 Checks status of all APs. 625 626 This function checks whether all APs have finished task assigned by StartupAllAPs(), 627 and whether timeout expires. 628 629 @retval EFI_SUCCESS All APs have finished task assigned by StartupAllAPs(). 630 @retval EFI_TIMEOUT The timeout expires. 631 @retval EFI_NOT_READY APs have not finished task and timeout has not expired. 632 **/ 633 EFI_STATUS 634 CheckAllAPs ( 635 VOID 636 ); 637 638 /** 639 Checks APs status and updates APs status if needed. 640 641 **/ 642 VOID 643 CheckAndUpdateApsStatus ( 644 VOID 645 ); 646 647 /** 648 Detect whether specified processor can find matching microcode patch and load it. 649 650 @param[in] CpuMpData The pointer to CPU MP Data structure. 651 @param[in] ProcessorNumber The handle number of the processor. The range is 652 from 0 to the total number of logical processors 653 minus 1. 654 **/ 655 VOID 656 MicrocodeDetect ( 657 IN CPU_MP_DATA *CpuMpData, 658 IN UINTN ProcessorNumber 659 ); 660 661 /** 662 Shadow the required microcode patches data into memory. 663 664 @param[in, out] CpuMpData The pointer to CPU MP Data structure. 665 **/ 666 VOID 667 ShadowMicrocodeUpdatePatch ( 668 IN OUT CPU_MP_DATA *CpuMpData 669 ); 670 671 /** 672 Get the cached microcode patch base address and size from the microcode patch 673 information cache HOB. 674 675 @param[out] Address Base address of the microcode patches data. 676 It will be updated if the microcode patch 677 information cache HOB is found. 678 @param[out] RegionSize Size of the microcode patches data. 679 It will be updated if the microcode patch 680 information cache HOB is found. 681 682 @retval TRUE The microcode patch information cache HOB is found. 683 @retval FALSE The microcode patch information cache HOB is not found. 684 685 **/ 686 BOOLEAN 687 GetMicrocodePatchInfoFromHob ( 688 UINT64 *Address, 689 UINT64 *RegionSize 690 ); 691 692 /** 693 Detect whether Mwait-monitor feature is supported. 694 695 @retval TRUE Mwait-monitor feature is supported. 696 @retval FALSE Mwait-monitor feature is not supported. 697 **/ 698 BOOLEAN 699 IsMwaitSupport ( 700 VOID 701 ); 702 703 /** 704 Enable Debug Agent to support source debugging on AP function. 705 706 **/ 707 VOID 708 EnableDebugAgent ( 709 VOID 710 ); 711 712 /** 713 Find the current Processor number by APIC ID. 714 715 @param[in] CpuMpData Pointer to PEI CPU MP Data 716 @param[out] ProcessorNumber Return the pocessor number found 717 718 @retval EFI_SUCCESS ProcessorNumber is found and returned. 719 @retval EFI_NOT_FOUND ProcessorNumber is not found. 720 **/ 721 EFI_STATUS 722 GetProcessorNumber ( 723 IN CPU_MP_DATA *CpuMpData, 724 OUT UINTN *ProcessorNumber 725 ); 726 727 /** 728 This funtion will try to invoke platform specific microcode shadow logic to 729 relocate microcode update patches into memory. 730 731 @param[in, out] CpuMpData The pointer to CPU MP Data structure. 732 733 @retval EFI_SUCCESS Shadow microcode success. 734 @retval EFI_OUT_OF_RESOURCES No enough resource to complete the operation. 735 @retval EFI_UNSUPPORTED Can't find platform specific microcode shadow 736 PPI/Protocol. 737 **/ 738 EFI_STATUS 739 PlatformShadowMicrocode ( 740 IN OUT CPU_MP_DATA *CpuMpData 741 ); 742 743 #endif 744 745