/
DxeMpLib.c
1283 lines (1120 loc) · 43.5 KB
/
DxeMpLib.c
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/** @file
MP initialize support functions for DXE phase.
Copyright (c) 2016 - 2023, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "MpLib.h"
#include <Library/UefiLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DebugAgentLib.h>
#include <Library/DxeServicesTableLib.h>
#include <Library/CcExitLib.h>
#include <Register/Amd/Fam17Msr.h>
#include <Register/Amd/Ghcb.h>
#include <Protocol/Timer.h>
#include <Library/DxeMemoryProtectionHobLib.h> // MU_CHANGE
// MU_CHANGE START: Update to enable removal of NX attribute from buffer
#include <Uefi.h>
#include <Protocol/MemoryAttribute.h>
// MU_CHANGE END
// MU_CHANGE: Add protocol for reporting multi-processor debug info
#include <Protocol/CpuMpDebug.h>
CPU_MP_DEBUG_PROTOCOL mCpuMpDebugProtocol = {
CPU_MP_DEBUG_SIGNATURE,
0,
0,
0,
FALSE,
INITIALIZE_LIST_HEAD_VARIABLE (mCpuMpDebugProtocol.Link)
};
// MU_CHANGE END
#define AP_SAFE_STACK_SIZE 128
CPU_MP_DATA *mCpuMpData = NULL;
EFI_EVENT mCheckAllApsEvent = NULL;
EFI_EVENT mMpInitExitBootServicesEvent = NULL;
EFI_EVENT mLegacyBootEvent = NULL;
volatile BOOLEAN mStopCheckAllApsStatus = TRUE;
RELOCATE_AP_LOOP_ENTRY mReservedApLoop;
UINTN mReservedTopOfApStack;
volatile UINT32 mNumberToFinish = 0;
UINTN mApPageTable;
//
// Begin wakeup buffer allocation below 0x88000
//
STATIC EFI_PHYSICAL_ADDRESS mSevEsDxeWakeupBuffer = 0x88000;
// MU_CHANGE START: Update to enable removal of NX attribute and application of RO
/**
Remove NX attribute from Buffer and apply RO to Buffer
@param[in] Buffer Buffer whose attributes will be altered
@param[in] Size Size of the buffer
@retval EFI_SUCCESS NX attribute removed, RO attribute applied
@retval EFI_INVALID_PARAMETER Buffer is not page-aligned or Buffer is 0 or Size of buffer
is not page-aligned
@retval Other Return value of LocateProtocol, ClearMemoryAttributes, or SetMemoryAttributes
**/
EFI_STATUS
BufferRemoveNoExecuteSetReadOnly (
IN EFI_PHYSICAL_ADDRESS Buffer,
IN UINTN Size
)
{
EFI_STATUS Status;
EFI_MEMORY_ATTRIBUTE_PROTOCOL *MemoryAttribute;
if ((Buffer == 0) || (Buffer % EFI_PAGE_SIZE != 0) || (Size % EFI_PAGE_SIZE != 0)) {
return EFI_INVALID_PARAMETER;
}
Status = gBS->LocateProtocol (
&gEfiMemoryAttributeProtocolGuid,
NULL,
(VOID **)&MemoryAttribute
);
if EFI_ERROR (Status) {
DEBUG ((DEBUG_INFO, "%a - Unable to locate Memory Attribute Protocol\n", __FUNCTION__));
ASSERT_EFI_ERROR (Status);
return Status;
}
Status = MemoryAttribute->SetMemoryAttributes (
MemoryAttribute,
Buffer,
Size,
EFI_MEMORY_RO
);
if EFI_ERROR (Status) {
DEBUG ((DEBUG_INFO, "%a - Unable to apply RO attribute to buffer\n", __FUNCTION__));
ASSERT_EFI_ERROR (Status);
}
Status = MemoryAttribute->ClearMemoryAttributes (
MemoryAttribute,
Buffer,
Size,
EFI_MEMORY_XP
);
if EFI_ERROR (Status) {
DEBUG ((DEBUG_INFO, "%a - Unable to clear NX attribute from buffer\n", __FUNCTION__));
ASSERT_EFI_ERROR (Status);
}
return Status;
}
/**
Remove NX attribute from Buffer
@param[in] Buffer Buffer whose attributes will be altered
@param[in] Size Size of the buffer
@retval EFI_SUCCESS NX attribute removed
@retval EFI_INVALID_PARAMETER Buffer is not page-aligned or Buffer is 0 or Size of buffer
is not page-aligned
@retval Other Return value of LocateProtocol or ClearMemoryAttributes
**/
EFI_STATUS
BufferRemoveNoExecute (
IN EFI_PHYSICAL_ADDRESS Buffer,
IN UINTN Size
)
{
EFI_STATUS Status;
EFI_MEMORY_ATTRIBUTE_PROTOCOL *MemoryAttribute;
if ((Buffer == 0) || (Buffer % EFI_PAGE_SIZE != 0) || (Size % EFI_PAGE_SIZE != 0)) {
DEBUG ((DEBUG_INFO, "%a - Invalid Parameter!\n", __FUNCTION__));
return EFI_INVALID_PARAMETER;
}
Status = gBS->LocateProtocol (
&gEfiMemoryAttributeProtocolGuid,
NULL,
(VOID **)&MemoryAttribute
);
if EFI_ERROR (Status) {
DEBUG ((DEBUG_INFO, "%a - Unable to locate Memory Attribute Protocol\n", __FUNCTION__));
ASSERT_EFI_ERROR (Status);
return Status;
}
Status = MemoryAttribute->ClearMemoryAttributes (
MemoryAttribute,
Buffer,
Size,
EFI_MEMORY_XP
);
if EFI_ERROR (Status) {
DEBUG ((DEBUG_INFO, "%a - Unable to clear NX attribute from buffer\n", __FUNCTION__));
ASSERT_EFI_ERROR (Status);
}
return Status;
}
// MU_CHANGE END
// MU_CHANGE START: Install protocol for reporting multi-processor debug info
/**
Add CPU_MP_DEBUG_PROTOCOL entry to the global list
@param[in] StackBuffer Start of AP stack buffer
@param[in] StackSize Size of the stack
@param[in] CpuNumber AP CPU number
@param[in] IsSwitchStack If the input buffer is the CPU switch stack
**/
VOID
EFIAPI
AppendCpuMpDebugProtocolEntry (
UINTN StackBuffer,
UINTN StackSize,
UINTN CpuNumber,
BOOLEAN IsSwitchStack
)
{
CPU_MP_DEBUG_PROTOCOL *Entry;
Entry = AllocatePool (sizeof (CPU_MP_DEBUG_PROTOCOL));
if (Entry == NULL) {
DEBUG ((DEBUG_ERROR, "%a - Failed to allocate memory!\n", __FUNCTION__));
return;
}
Entry->Signature = CPU_MP_DEBUG_SIGNATURE;
Entry->ApStackBuffer = StackBuffer;
Entry->ApStackSize = StackSize;
Entry->CpuNumber = CpuNumber;
Entry->IsSwitchStack = IsSwitchStack;
InsertTailList (&mCpuMpDebugProtocol.Link, &Entry->Link);
}
// MU_CHANGE START: Install protocol for reporting multi-processor debug info
/**
Install the CPU MP debug protocol
**/
STATIC
VOID
InstallCpuMpDebugProtocol (
VOID
)
{
EFI_HANDLE MpDebugHandle = NULL;
EFI_STATUS Status;
Status = gBS->InstallMultipleProtocolInterfaces (
&MpDebugHandle,
&gCpuMpDebugProtocolGuid,
&mCpuMpDebugProtocol,
NULL
);
DEBUG ((DEBUG_INFO, "Installed gCpuMpDebugProtocolGuid - Status: %r\n", Status));
}
// MU_CHANGE END
/**
Enable Debug Agent to support source debugging on AP function.
**/
VOID
EnableDebugAgent (
VOID
)
{
//
// Initialize Debug Agent to support source level debug in DXE phase
//
InitializeDebugAgent (DEBUG_AGENT_INIT_DXE_AP, NULL, NULL);
}
/**
Get the pointer to CPU MP Data structure.
@return The pointer to CPU MP Data structure.
**/
CPU_MP_DATA *
GetCpuMpData (
VOID
)
{
ASSERT (mCpuMpData != NULL);
return mCpuMpData;
}
/**
Save the pointer to CPU MP Data structure.
@param[in] CpuMpData The pointer to CPU MP Data structure will be saved.
**/
VOID
SaveCpuMpData (
IN CPU_MP_DATA *CpuMpData
)
{
mCpuMpData = CpuMpData;
}
/**
Get available system memory below 0x88000 by specified size.
@param[in] WakeupBufferSize Wakeup buffer size required
@retval other Return wakeup buffer address below 1MB.
@retval -1 Cannot find free memory below 1MB.
**/
UINTN
GetWakeupBuffer (
IN UINTN WakeupBufferSize
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS StartAddress;
EFI_MEMORY_TYPE MemoryType;
// MU_CHANGE START Add PCD to make wakeup buffer reserved
if (PcdGetBool (PcdCpuApWakeupBufferReserved)) {
MemoryType = EfiReservedMemoryType;
// MU_CHANGE END
} else if (ConfidentialComputingGuestHas (CCAttrAmdSevEs) &&
!ConfidentialComputingGuestHas (CCAttrAmdSevSnp))
{
//
// An SEV-ES-only guest requires the memory to be reserved. SEV-SNP, which
// is also considered SEV-ES, uses a different AP startup method, though,
// which does not have the same requirement.
//
MemoryType = EfiReservedMemoryType;
} else {
MemoryType = EfiBootServicesData;
}
//
// Try to allocate buffer below 1M for waking vector.
// LegacyBios driver only reports warning when page allocation in range
// [0x60000, 0x88000) fails.
// This library is consumed by CpuDxe driver to produce CPU Arch protocol.
// LagacyBios driver depends on CPU Arch protocol which guarantees below
// allocation runs earlier than LegacyBios driver.
//
if (ConfidentialComputingGuestHas (CCAttrAmdSevEs)) {
//
// SEV-ES Wakeup buffer should be under 0x88000 and under any previous one
//
StartAddress = mSevEsDxeWakeupBuffer;
} else {
StartAddress = 0x88000;
}
Status = gBS->AllocatePages (
AllocateMaxAddress,
MemoryType,
EFI_SIZE_TO_PAGES (WakeupBufferSize),
&StartAddress
);
ASSERT_EFI_ERROR (Status);
if (EFI_ERROR (Status)) {
StartAddress = (EFI_PHYSICAL_ADDRESS)-1;
} else if (ConfidentialComputingGuestHas (CCAttrAmdSevEs)) {
//
// Next SEV-ES wakeup buffer allocation must be below this allocation
//
mSevEsDxeWakeupBuffer = StartAddress;
}
DEBUG ((
DEBUG_INFO,
"WakeupBufferStart = %x, WakeupBufferSize = %x\n",
(UINTN)StartAddress,
WakeupBufferSize
));
return (UINTN)StartAddress;
}
/**
Get available EfiBootServicesCode memory below 4GB by specified size.
This buffer is required to safely transfer AP from real address mode to
protected mode or long mode, due to the fact that the buffer returned by
GetWakeupBuffer() may be marked as non-executable.
@param[in] BufferSize Wakeup transition buffer size.
@retval other Return wakeup transition buffer address below 4GB.
@retval 0 Cannot find free memory below 4GB.
**/
UINTN
AllocateCodeBuffer (
IN UINTN BufferSize
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS StartAddress;
StartAddress = BASE_4GB - 1;
Status = gBS->AllocatePages (
AllocateMaxAddress,
EfiBootServicesCode,
EFI_SIZE_TO_PAGES (BufferSize),
&StartAddress
);
if (EFI_ERROR (Status)) {
StartAddress = 0;
}
return (UINTN)StartAddress;
}
/**
Return the address of the SEV-ES AP jump table.
This buffer is required in order for an SEV-ES guest to transition from
UEFI into an OS.
@return Return SEV-ES AP jump table buffer
**/
UINTN
GetSevEsAPMemory (
VOID
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS StartAddress;
MSR_SEV_ES_GHCB_REGISTER Msr;
GHCB *Ghcb;
BOOLEAN InterruptState;
//
// Allocate 1 page for AP jump table page
//
StartAddress = BASE_4GB - 1;
Status = gBS->AllocatePages (
AllocateMaxAddress,
EfiReservedMemoryType,
1,
&StartAddress
);
ASSERT_EFI_ERROR (Status);
DEBUG ((DEBUG_INFO, "Dxe: SevEsAPMemory = %lx\n", (UINTN)StartAddress));
//
// Save the SevEsAPMemory as the AP jump table.
//
Msr.GhcbPhysicalAddress = AsmReadMsr64 (MSR_SEV_ES_GHCB);
Ghcb = Msr.Ghcb;
CcExitVmgInit (Ghcb, &InterruptState);
CcExitVmgExit (Ghcb, SVM_EXIT_AP_JUMP_TABLE, 0, (UINT64)(UINTN)StartAddress);
CcExitVmgDone (Ghcb, InterruptState);
return (UINTN)StartAddress;
}
/**
Checks APs status and updates APs status if needed.
**/
VOID
CheckAndUpdateApsStatus (
VOID
)
{
UINTN ProcessorNumber;
EFI_STATUS Status;
CPU_MP_DATA *CpuMpData;
CpuMpData = GetCpuMpData ();
//
// First, check whether pending StartupAllAPs() exists.
//
if (CpuMpData->WaitEvent != NULL) {
Status = CheckAllAPs ();
//
// If all APs finish for StartupAllAPs(), signal the WaitEvent for it.
//
if (Status != EFI_NOT_READY) {
Status = gBS->SignalEvent (CpuMpData->WaitEvent);
CpuMpData->WaitEvent = NULL;
}
}
//
// Second, check whether pending StartupThisAPs() callings exist.
//
for (ProcessorNumber = 0; ProcessorNumber < CpuMpData->CpuCount; ProcessorNumber++) {
if (CpuMpData->CpuData[ProcessorNumber].WaitEvent == NULL) {
continue;
}
Status = CheckThisAP (ProcessorNumber);
if (Status != EFI_NOT_READY) {
gBS->SignalEvent (CpuMpData->CpuData[ProcessorNumber].WaitEvent);
CpuMpData->CpuData[ProcessorNumber].WaitEvent = NULL;
}
}
}
/**
Checks APs' status periodically.
This function is triggered by timer periodically to check the
state of APs for StartupAllAPs() and StartupThisAP() executed
in non-blocking mode.
@param[in] Event Event triggered.
@param[in] Context Parameter passed with the event.
**/
VOID
EFIAPI
CheckApsStatus (
IN EFI_EVENT Event,
IN VOID *Context
)
{
//
// If CheckApsStatus() is not stopped, otherwise return immediately.
//
if (!mStopCheckAllApsStatus) {
CheckAndUpdateApsStatus ();
}
}
/**
Get Protected mode code segment with 16-bit default addressing
from current GDT table.
@return Protected mode 16-bit code segment value.
**/
UINT16
GetProtectedMode16CS (
VOID
)
{
EFI_STATUS Status;
IA32_DESCRIPTOR GdtrDesc;
IA32_SEGMENT_DESCRIPTOR *GdtEntry;
UINTN GdtEntryCount;
UINTN Index;
UINT16 CodeSegmentValue;
Index = (UINT16)-1;
AsmReadGdtr (&GdtrDesc);
GdtEntryCount = (GdtrDesc.Limit + 1) / sizeof (IA32_SEGMENT_DESCRIPTOR);
GdtEntry = (IA32_SEGMENT_DESCRIPTOR *)GdtrDesc.Base;
for (Index = 0; Index < GdtEntryCount; Index++) {
if (GdtEntry->Bits.L == 0) {
if ((GdtEntry->Bits.Type > 8) && (GdtEntry->Bits.DB == 0)) {
break;
}
}
GdtEntry++;
}
Status = SafeUintnToUint16 (Index, &CodeSegmentValue);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return 0;
}
Status = SafeUint16Mult (CodeSegmentValue, 8, &CodeSegmentValue);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return 0;
}
return CodeSegmentValue;
}
/**
Get Protected mode code segment from current GDT table.
@return Protected mode code segment value.
**/
UINT16
GetProtectedModeCS (
VOID
)
{
EFI_STATUS Status;
IA32_DESCRIPTOR GdtrDesc;
IA32_SEGMENT_DESCRIPTOR *GdtEntry;
UINTN GdtEntryCount;
UINTN Index;
UINT16 CodeSegmentValue;
AsmReadGdtr (&GdtrDesc);
GdtEntryCount = (GdtrDesc.Limit + 1) / sizeof (IA32_SEGMENT_DESCRIPTOR);
GdtEntry = (IA32_SEGMENT_DESCRIPTOR *)GdtrDesc.Base;
for (Index = 0; Index < GdtEntryCount; Index++) {
if (GdtEntry->Bits.L == 0) {
if ((GdtEntry->Bits.Type > 8) && (GdtEntry->Bits.DB == 1)) {
break;
}
}
GdtEntry++;
}
Status = SafeUintnToUint16 (Index, &CodeSegmentValue);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return 0;
}
Status = SafeUint16Mult (CodeSegmentValue, 8, &CodeSegmentValue);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return 0;
}
return CodeSegmentValue;
}
/**
Do sync on APs.
@param[in, out] Buffer Pointer to private data buffer.
**/
VOID
EFIAPI
RelocateApLoop (
IN OUT VOID *Buffer
)
{
CPU_MP_DATA *CpuMpData;
BOOLEAN MwaitSupport;
UINTN ProcessorNumber;
UINTN StackStart;
MpInitLibWhoAmI (&ProcessorNumber);
CpuMpData = GetCpuMpData ();
MwaitSupport = IsMwaitSupport ();
if (CpuMpData->UseSevEsAPMethod) {
//
// 64-bit AMD processors with SEV-ES
//
StackStart = CpuMpData->SevEsAPResetStackStart;
mReservedApLoop.AmdSevEntry (
MwaitSupport,
CpuMpData->ApTargetCState,
CpuMpData->PmCodeSegment,
StackStart - ProcessorNumber * AP_SAFE_STACK_SIZE,
(UINTN)&mNumberToFinish,
CpuMpData->Pm16CodeSegment,
CpuMpData->SevEsAPBuffer,
CpuMpData->WakeupBuffer
);
} else {
//
// Intel processors (32-bit or 64-bit), 32-bit AMD processors, or 64-bit AMD processors without SEV-ES
//
StackStart = mReservedTopOfApStack;
mReservedApLoop.GenericEntry (
MwaitSupport,
CpuMpData->ApTargetCState,
StackStart - ProcessorNumber * AP_SAFE_STACK_SIZE,
(UINTN)&mNumberToFinish,
mApPageTable
);
}
//
// It should never reach here
//
ASSERT (FALSE);
}
/**
Callback function for ExitBootServices.
@param[in] Event Event whose notification function is being invoked.
@param[in] Context The pointer to the notification function's context,
which is implementation-dependent.
**/
VOID
EFIAPI
MpInitChangeApLoopCallback (
IN EFI_EVENT Event,
IN VOID *Context
)
{
CPU_MP_DATA *CpuMpData;
CpuMpData = GetCpuMpData ();
CpuMpData->PmCodeSegment = GetProtectedModeCS ();
CpuMpData->Pm16CodeSegment = GetProtectedMode16CS ();
CpuMpData->ApLoopMode = PcdGet8 (PcdCpuApLoopMode);
mNumberToFinish = CpuMpData->CpuCount - 1;
// MU_CHANGE START: Remove NX from AP Loop Buffer
BufferRemoveNoExecute (
(EFI_PHYSICAL_ADDRESS)(UINTN)mReservedApLoopFunc,
EFI_PAGES_TO_SIZE (EFI_SIZE_TO_PAGES (CpuMpData->AddressMap.RelocateApLoopFuncSize))
);
// MU_CHANGE END
WakeUpAP (CpuMpData, TRUE, 0, RelocateApLoop, NULL, TRUE);
while (mNumberToFinish > 0) {
CpuPause ();
}
if (CpuMpData->UseSevEsAPMethod && (CpuMpData->WakeupBuffer != (UINTN)-1)) {
//
// There are APs present. Re-use reserved memory area below 1MB from
// WakeupBuffer as the area to be used for transitioning to 16-bit mode
// in support of booting of the AP by an OS.
//
CopyMem (
(VOID *)CpuMpData->WakeupBuffer,
(VOID *)(CpuMpData->AddressMap.RendezvousFunnelAddress +
CpuMpData->AddressMap.SwitchToRealPM16ModeOffset),
CpuMpData->AddressMap.SwitchToRealPM16ModeSize
);
}
DEBUG ((DEBUG_INFO, "%a() done!\n", __func__));
}
/**
Initialize global data for MP support.
@param[in] CpuMpData The pointer to CPU MP Data structure.
**/
VOID
InitMpGlobalData (
IN CPU_MP_DATA *CpuMpData
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS Address;
UINTN Index;
EFI_GCD_MEMORY_SPACE_DESCRIPTOR MemDesc;
UINTN StackBase;
CPU_INFO_IN_HOB *CpuInfoInHob;
MP_ASSEMBLY_ADDRESS_MAP *AddressMap;
UINT8 *ApLoopFunc;
UINTN ApLoopFuncSize;
UINTN StackPages;
UINTN FuncPages;
SaveCpuMpData (CpuMpData);
if (CpuMpData->CpuCount == 1) {
//
// If only BSP exists, return
//
return;
}
// MU_CHANGE START Update to use memory protection settings HOB
// if (PcdGetBool (PcdCpuStackGuard)) {
if (gDxeMps.CpuStackGuard) {
// MU_CHANGE END
//
// One extra page at the bottom of the stack is needed for Guard page.
//
if (CpuMpData->CpuApStackSize <= EFI_PAGE_SIZE) {
DEBUG ((DEBUG_ERROR, "PcdCpuApStackSize is not big enough for Stack Guard!\n"));
ASSERT (FALSE);
}
//
// DXE will reuse stack allocated for APs at PEI phase if it's available.
// Let's check it here.
//
// Note: BSP's stack guard is set at DxeIpl phase. But for the sake of
// BSP/AP exchange, stack guard for ApTopOfStack of cpu 0 will still be
// set here.
//
CpuInfoInHob = (CPU_INFO_IN_HOB *)(UINTN)CpuMpData->CpuInfoInHob;
for (Index = 0; Index < CpuMpData->CpuCount; ++Index) {
if ((CpuInfoInHob != NULL) && (CpuInfoInHob[Index].ApTopOfStack != 0)) {
StackBase = (UINTN)CpuInfoInHob[Index].ApTopOfStack - CpuMpData->CpuApStackSize;
} else {
StackBase = CpuMpData->Buffer + Index * CpuMpData->CpuApStackSize;
}
Status = gDS->GetMemorySpaceDescriptor (StackBase, &MemDesc);
ASSERT_EFI_ERROR (Status);
Status = gDS->SetMemorySpaceAttributes (
StackBase,
EFI_PAGES_TO_SIZE (1),
MemDesc.Attributes | EFI_MEMORY_RP
);
ASSERT_EFI_ERROR (Status);
AppendCpuMpDebugProtocolEntry (StackBase, CpuMpData->CpuApStackSize, Index, FALSE); // MU_CHANGE
DEBUG ((
DEBUG_INFO,
"Stack Guard set at %lx [cpu%lu]!\n",
(UINT64)StackBase,
(UINT64)Index
));
}
InstallCpuMpDebugProtocol (); // MU_CHANGE
}
// MU_CHANGE START: Add the Debug Protocol in the case that CpuStackGuard is not active
else {
CpuInfoInHob = (CPU_INFO_IN_HOB *)(UINTN)CpuMpData->CpuInfoInHob;
for (Index = 0; Index < CpuMpData->CpuCount; ++Index) {
if ((CpuInfoInHob != NULL) && (CpuInfoInHob[Index].ApTopOfStack != 0)) {
StackBase = (UINTN)CpuInfoInHob[Index].ApTopOfStack - CpuMpData->CpuApStackSize;
} else {
StackBase = CpuMpData->Buffer + Index * CpuMpData->CpuApStackSize;
}
AppendCpuMpDebugProtocolEntry (StackBase, CpuMpData->CpuApStackSize, Index, FALSE);
}
InstallCpuMpDebugProtocol ();
}
// MU_CHANGE END
AddressMap = &CpuMpData->AddressMap;
if (CpuMpData->UseSevEsAPMethod) {
//
// 64-bit AMD processors with SEV-ES
//
Address = BASE_4GB - 1;
ApLoopFunc = AddressMap->RelocateApLoopFuncAddressAmdSev;
ApLoopFuncSize = AddressMap->RelocateApLoopFuncSizeAmdSev;
} else {
//
// Intel processors (32-bit or 64-bit), 32-bit AMD processors, or 64-bit AMD processors without SEV-ES
//
Address = MAX_ADDRESS;
ApLoopFunc = AddressMap->RelocateApLoopFuncAddressGeneric;
ApLoopFuncSize = AddressMap->RelocateApLoopFuncSizeGeneric;
}
//
// Avoid APs access invalid buffer data which allocated by BootServices,
// so we will allocate reserved data for AP loop code. We also need to
// allocate this buffer below 4GB due to APs may be transferred to 32bit
// protected mode on long mode DXE.
// Allocating it in advance since memory services are not available in
// Exit Boot Services callback function.
//
// +------------+ (TopOfApStack)
// | Stack * N |
// +------------+ (stack base, 4k aligned)
// | Padding |
// +------------+
// | Ap Loop |
// +------------+ ((low address, 4k-aligned)
//
StackPages = EFI_SIZE_TO_PAGES (CpuMpData->CpuCount * AP_SAFE_STACK_SIZE);
FuncPages = EFI_SIZE_TO_PAGES (ApLoopFuncSize);
Status = gBS->AllocatePages (
AllocateMaxAddress,
EfiReservedMemoryType,
StackPages + FuncPages,
&Address
);
ASSERT_EFI_ERROR (Status);
//
// Make sure that the buffer memory is executable if NX protection is enabled
// for EfiReservedMemoryType.
//
// TODO: Check EFI_MEMORY_XP bit set or not once it's available in DXE GCD
// service.
//
// MU_CHANGE START: Remove NX in MpInitChangeApLoopCallback()
// Status = gDS->GetMemorySpaceDescriptor (Address, &MemDesc);
// if (!EFI_ERROR (Status)) {
// gDS->SetMemorySpaceAttributes (
// Address,
// EFI_PAGES_TO_SIZE (FuncPages),
// MemDesc.Attributes & (~EFI_MEMORY_XP)
// );
// }
// MU_CHANGE END
mReservedTopOfApStack = (UINTN)Address + EFI_PAGES_TO_SIZE (StackPages+FuncPages);
ASSERT ((mReservedTopOfApStack & (UINTN)(CPU_STACK_ALIGNMENT - 1)) == 0);
mReservedApLoop.Data = (VOID *)(UINTN)Address;
ASSERT (mReservedApLoop.Data != NULL);
CopyMem (mReservedApLoop.Data, ApLoopFunc, ApLoopFuncSize);
if (!CpuMpData->UseSevEsAPMethod) {
//
// processors without SEV-ES
//
mApPageTable = CreatePageTable (
(UINTN)Address,
EFI_PAGES_TO_SIZE (StackPages+FuncPages)
);
}
Status = gBS->CreateEvent (
EVT_TIMER | EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
CheckApsStatus,
NULL,
&mCheckAllApsEvent
);
ASSERT_EFI_ERROR (Status);
//
// Set timer to check all APs status.
//
Status = gBS->SetTimer (
mCheckAllApsEvent,
TimerPeriodic,
EFI_TIMER_PERIOD_MICROSECONDS (
PcdGet32 (PcdCpuApStatusCheckIntervalInMicroSeconds)
)
);
ASSERT_EFI_ERROR (Status);
Status = gBS->CreateEvent (
EVT_SIGNAL_EXIT_BOOT_SERVICES,
TPL_CALLBACK,
MpInitChangeApLoopCallback,
NULL,
&mMpInitExitBootServicesEvent
);
ASSERT_EFI_ERROR (Status);
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_CALLBACK,
MpInitChangeApLoopCallback,
NULL,
&gEfiEventLegacyBootGuid,
&mLegacyBootEvent
);
ASSERT_EFI_ERROR (Status);
}
/**
This service executes a caller provided function on all enabled APs.
@param[in] Procedure A pointer to the function to be run on
enabled APs of the system. See type
EFI_AP_PROCEDURE.
@param[in] SingleThread If TRUE, then all the enabled APs execute
the function specified by Procedure one by
one, in ascending order of processor handle
number. If FALSE, then all the enabled APs
execute the function specified by Procedure
simultaneously.
@param[in] WaitEvent The event created by the caller with CreateEvent()
service. If it is NULL, then execute in
blocking mode. BSP waits until all APs finish
or TimeoutInMicroSeconds expires. If it's
not NULL, then execute in non-blocking mode.
BSP requests the function specified by
Procedure to be started on all the enabled
APs, and go on executing immediately. If
all return from Procedure, or TimeoutInMicroSeconds
expires, this event is signaled. The BSP
can use the CheckEvent() or WaitForEvent()
services to check the state of event. Type
EFI_EVENT is defined in CreateEvent() in
the Unified Extensible Firmware Interface
Specification.
@param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
APs to return from Procedure, either for
blocking or non-blocking mode. Zero means
infinity. If the timeout expires before
all APs return from Procedure, then Procedure
on the failed APs is terminated. All enabled
APs are available for next function assigned
by MpInitLibStartupAllAPs() or
MPInitLibStartupThisAP().
If the timeout expires in blocking mode,
BSP returns EFI_TIMEOUT. If the timeout
expires in non-blocking mode, WaitEvent
is signaled with SignalEvent().
@param[in] ProcedureArgument The parameter passed into Procedure for
all APs.
@param[out] FailedCpuList If NULL, this parameter is ignored. Otherwise,
if all APs finish successfully, then its
content is set to NULL. If not all APs
finish before timeout expires, then its
content is set to address of the buffer
holding handle numbers of the failed APs.
The buffer is allocated by MP Initialization
library, and it's the caller's responsibility to
free the buffer with FreePool() service.
In blocking mode, it is ready for consumption
when the call returns. In non-blocking mode,
it is ready when WaitEvent is signaled. The
list of failed CPU is terminated by
END_OF_CPU_LIST.
@retval EFI_SUCCESS In blocking mode, all APs have finished before
the timeout expired.
@retval EFI_SUCCESS In non-blocking mode, function has been dispatched
to all enabled APs.
@retval EFI_UNSUPPORTED A non-blocking mode request was made after the
UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
signaled.
@retval EFI_UNSUPPORTED WaitEvent is not NULL if non-blocking mode is not
supported.
@retval EFI_DEVICE_ERROR Caller processor is AP.
@retval EFI_NOT_STARTED No enabled APs exist in the system.
@retval EFI_NOT_READY Any enabled APs are busy.
@retval EFI_NOT_READY MP Initialize Library is not initialized.
@retval EFI_TIMEOUT In blocking mode, the timeout expired before
all enabled APs have finished.
@retval EFI_INVALID_PARAMETER Procedure is NULL.
**/
EFI_STATUS
EFIAPI
MpInitLibStartupAllAPs (
IN EFI_AP_PROCEDURE Procedure,
IN BOOLEAN SingleThread,
IN EFI_EVENT WaitEvent OPTIONAL,
IN UINTN TimeoutInMicroseconds,