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audk/MdeModulePkg/Library/SmmLockBoxLib/SmmLockBoxPeiLib.c

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/** @file
Copyright (c) 2010 - 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiPei.h>
#include <PiDxe.h>
#include <PiSmm.h>
#include <Library/PeiServicesTablePointerLib.h>
#include <Library/PeiServicesLib.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/LockBoxLib.h>
#include <Library/HobLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <Protocol/SmmCommunication.h>
#include <Ppi/SmmCommunication.h>
#include <Ppi/SmmAccess.h>
#include <Guid/AcpiS3Context.h>
#include <Guid/SmmLockBox.h>
#include "SmmLockBoxLibPrivate.h"
#if defined (MDE_CPU_IA32)
typedef struct _LIST_ENTRY64 LIST_ENTRY64;
struct _LIST_ENTRY64 {
LIST_ENTRY64 *ForwardLink;
UINT32 Reserved1;
LIST_ENTRY64 *BackLink;
UINT32 Reserved2;
};
typedef struct {
EFI_TABLE_HEADER Hdr;
UINT64 SmmFirmwareVendor;
UINT64 SmmFirmwareRevision;
UINT64 SmmInstallConfigurationTable;
UINT64 SmmIoMemRead;
UINT64 SmmIoMemWrite;
UINT64 SmmIoIoRead;
UINT64 SmmIoIoWrite;
UINT64 SmmAllocatePool;
UINT64 SmmFreePool;
UINT64 SmmAllocatePages;
UINT64 SmmFreePages;
UINT64 SmmStartupThisAp;
UINT64 CurrentlyExecutingCpu;
UINT64 NumberOfCpus;
UINT64 CpuSaveStateSize;
UINT64 CpuSaveState;
UINT64 NumberOfTableEntries;
UINT64 SmmConfigurationTable;
} EFI_SMM_SYSTEM_TABLE2_64;
typedef struct {
EFI_GUID VendorGuid;
UINT64 VendorTable;
} EFI_CONFIGURATION_TABLE64;
#endif
#if defined (MDE_CPU_X64)
typedef LIST_ENTRY LIST_ENTRY64;
typedef EFI_SMM_SYSTEM_TABLE2 EFI_SMM_SYSTEM_TABLE2_64;
typedef EFI_CONFIGURATION_TABLE EFI_CONFIGURATION_TABLE64;
#endif
/**
This function return first node of LinkList queue.
@param LockBoxQueue LinkList queue
@return first node of LinkList queue
**/
LIST_ENTRY *
InternalInitLinkDxe (
IN LIST_ENTRY *LinkList
)
{
if ((sizeof(UINTN) == sizeof(UINT32)) && (FeaturePcdGet (PcdDxeIplSwitchToLongMode)) ) {
//
// 32 PEI + 64 DXE
//
return (LIST_ENTRY *)(((LIST_ENTRY64 *)LinkList)->ForwardLink);
} else {
return LinkList->ForwardLink;
}
}
/**
This function return next node of LinkList.
@param Link LinkList node
@return next node of LinkList
**/
LIST_ENTRY *
InternalNextLinkDxe (
IN LIST_ENTRY *Link
)
{
if ((sizeof(UINTN) == sizeof(UINT32)) && (FeaturePcdGet (PcdDxeIplSwitchToLongMode)) ) {
//
// 32 PEI + 64 DXE
//
return (LIST_ENTRY *)(((LIST_ENTRY64 *)Link)->ForwardLink);
} else {
return Link->ForwardLink;
}
}
/**
This function find LockBox by GUID from SMRAM.
@param LockBoxQueue The LockBox queue in SMRAM
@param Guid The guid to indentify the LockBox
@return LockBoxData
**/
SMM_LOCK_BOX_DATA *
InternalFindLockBoxByGuidFromSmram (
IN LIST_ENTRY *LockBoxQueue,
IN EFI_GUID *Guid
)
{
LIST_ENTRY *Link;
SMM_LOCK_BOX_DATA *LockBox;
for (Link = InternalInitLinkDxe (LockBoxQueue);
Link != LockBoxQueue;
Link = InternalNextLinkDxe (Link)) {
LockBox = BASE_CR (
Link,
SMM_LOCK_BOX_DATA,
Link
);
if (CompareGuid (&LockBox->Guid, Guid)) {
return LockBox;
}
}
return NULL;
}
/**
Get VendorTable by VendorGuid in Smst.
@param Signature Signature of SMM_S3_RESUME_STATE
@param Smst SMM system table
@param VendorGuid vendor guid
@return vendor table.
**/
VOID *
InternalSmstGetVendorTableByGuid (
IN UINT64 Signature,
IN EFI_SMM_SYSTEM_TABLE2 *Smst,
IN EFI_GUID *VendorGuid
)
{
EFI_CONFIGURATION_TABLE *SmmConfigurationTable;
UINTN NumberOfTableEntries;
UINTN Index;
EFI_SMM_SYSTEM_TABLE2_64 *Smst64;
EFI_CONFIGURATION_TABLE64 *SmmConfigurationTable64;
if ((sizeof(UINTN) == sizeof(UINT32)) && (FeaturePcdGet (PcdDxeIplSwitchToLongMode))) {
//
// 32 PEI + 64 DXE
//
Smst64 = (EFI_SMM_SYSTEM_TABLE2_64 *)Smst;
SmmConfigurationTable64 = (EFI_CONFIGURATION_TABLE64 *)(UINTN)Smst64->SmmConfigurationTable;
NumberOfTableEntries = (UINTN)Smst64->NumberOfTableEntries;
for (Index = 0; Index < NumberOfTableEntries; Index++) {
if (CompareGuid (&SmmConfigurationTable64[Index].VendorGuid, VendorGuid)) {
return (VOID *)(UINTN)SmmConfigurationTable64[Index].VendorTable;
}
}
return NULL;
} else {
SmmConfigurationTable = Smst->SmmConfigurationTable;
NumberOfTableEntries = Smst->NumberOfTableEntries;
for (Index = 0; Index < NumberOfTableEntries; Index++) {
if (CompareGuid (&SmmConfigurationTable[Index].VendorGuid, VendorGuid)) {
return (VOID *)SmmConfigurationTable[Index].VendorTable;
}
}
return NULL;
}
}
/**
Get SMM LockBox context.
@return SMM LockBox context.
**/
SMM_LOCK_BOX_CONTEXT *
InternalGetSmmLockBoxContext (
VOID
)
{
EFI_SMRAM_DESCRIPTOR *SmramDescriptor;
SMM_S3_RESUME_STATE *SmmS3ResumeState;
VOID *GuidHob;
SMM_LOCK_BOX_CONTEXT *SmmLockBoxContext;
GuidHob = GetFirstGuidHob (&gEfiAcpiVariableGuid);
ASSERT (GuidHob != NULL);
SmramDescriptor = (EFI_SMRAM_DESCRIPTOR *) GET_GUID_HOB_DATA (GuidHob);
SmmS3ResumeState = (SMM_S3_RESUME_STATE *)(UINTN)SmramDescriptor->CpuStart;
SmmLockBoxContext = (SMM_LOCK_BOX_CONTEXT *)InternalSmstGetVendorTableByGuid (
SmmS3ResumeState->Signature,
(EFI_SMM_SYSTEM_TABLE2 *)(UINTN)SmmS3ResumeState->Smst,
&gEfiSmmLockBoxCommunicationGuid
);
ASSERT (SmmLockBoxContext != NULL);
return SmmLockBoxContext;
}
/**
This function will restore confidential information from lockbox in SMRAM directly.
@param Guid the guid to identify the confidential information
@param Buffer the address of the restored confidential information
NULL means restored to original address, Length MUST be NULL at same time.
@param Length the length of the restored confidential information
@retval RETURN_SUCCESS the information is restored successfully.
@retval RETURN_WRITE_PROTECTED Buffer and Length are NULL, but the LockBox has no
LOCK_BOX_ATTRIBUTE_RESTORE_IN_PLACE attribute.
@retval RETURN_BUFFER_TOO_SMALL the Length is too small to hold the confidential information.
@retval RETURN_NOT_FOUND the requested GUID not found.
**/
EFI_STATUS
InternalRestoreLockBoxFromSmram (
IN GUID *Guid,
IN VOID *Buffer, OPTIONAL
IN OUT UINTN *Length OPTIONAL
)
{
PEI_SMM_ACCESS_PPI *SmmAccess;
UINTN Index;
EFI_STATUS Status;
SMM_LOCK_BOX_CONTEXT *SmmLockBoxContext;
LIST_ENTRY *LockBoxQueue;
SMM_LOCK_BOX_DATA *LockBox;
VOID *RestoreBuffer;
//
// Get needed resource
//
Status = PeiServicesLocatePpi (
&gPeiSmmAccessPpiGuid,
0,
NULL,
(VOID **)&SmmAccess
);
if (!EFI_ERROR (Status)) {
for (Index = 0; !EFI_ERROR (Status); Index++) {
Status = SmmAccess->Open ((EFI_PEI_SERVICES **)GetPeiServicesTablePointer (), SmmAccess, Index);
}
}
//
// Get LockBox context
//
SmmLockBoxContext = InternalGetSmmLockBoxContext ();
LockBoxQueue = (LIST_ENTRY *)(UINTN)SmmLockBoxContext->LockBoxDataAddress;
//
// We do NOT check Buffer address in SMRAM, because if SMRAM not locked, we trust the caller.
//
//
// Restore this, Buffer and Length MUST be both NULL or both non-NULL
//
//
// Find LockBox
//
LockBox = InternalFindLockBoxByGuidFromSmram (LockBoxQueue, Guid);
if (LockBox == NULL) {
//
// Not found
//
return EFI_NOT_FOUND;
}
//
// Set RestoreBuffer
//
if (Buffer != NULL) {
//
// restore to new buffer
//
RestoreBuffer = Buffer;
} else {
//
// restore to original buffer
//
if ((LockBox->Attributes & LOCK_BOX_ATTRIBUTE_RESTORE_IN_PLACE) == 0) {
return EFI_WRITE_PROTECTED;
}
RestoreBuffer = (VOID *)(UINTN)LockBox->Buffer;
}
//
// Set RestoreLength
//
if (Length != NULL) {
if (*Length < (UINTN)LockBox->Length) {
//
// Input buffer is too small to hold all data.
//
*Length = (UINTN)LockBox->Length;
return EFI_BUFFER_TOO_SMALL;
}
*Length = (UINTN)LockBox->Length;
}
//
// Restore data
//
CopyMem (RestoreBuffer, (VOID *)(UINTN)LockBox->SmramBuffer, (UINTN)LockBox->Length);
//
// Done
//
return EFI_SUCCESS;
}
/**
This function will restore confidential information from all lockbox which have RestoreInPlace attribute.
@retval RETURN_SUCCESS the information is restored successfully.
**/
EFI_STATUS
InternalRestoreAllLockBoxInPlaceFromSmram (
VOID
)
{
PEI_SMM_ACCESS_PPI *SmmAccess;
UINTN Index;
EFI_STATUS Status;
SMM_LOCK_BOX_CONTEXT *SmmLockBoxContext;
LIST_ENTRY *LockBoxQueue;
SMM_LOCK_BOX_DATA *LockBox;
LIST_ENTRY *Link;
//
// Get needed resource
//
Status = PeiServicesLocatePpi (
&gPeiSmmAccessPpiGuid,
0,
NULL,
(VOID **)&SmmAccess
);
if (!EFI_ERROR (Status)) {
for (Index = 0; !EFI_ERROR (Status); Index++) {
Status = SmmAccess->Open ((EFI_PEI_SERVICES **)GetPeiServicesTablePointer (), SmmAccess, Index);
}
}
//
// Get LockBox context
//
SmmLockBoxContext = InternalGetSmmLockBoxContext ();
LockBoxQueue = (LIST_ENTRY *)(UINTN)SmmLockBoxContext->LockBoxDataAddress;
//
// We do NOT check Buffer address in SMRAM, because if SMRAM not locked, we trust the caller.
//
//
// Restore all, Buffer and Length MUST be NULL
//
for (Link = InternalInitLinkDxe (LockBoxQueue);
Link != LockBoxQueue;
Link = InternalNextLinkDxe (Link)) {
LockBox = BASE_CR (
Link,
SMM_LOCK_BOX_DATA,
Link
);
if ((LockBox->Attributes & LOCK_BOX_ATTRIBUTE_RESTORE_IN_PLACE) != 0) {
//
// Restore data
//
CopyMem ((VOID *)(UINTN)LockBox->Buffer, (VOID *)(UINTN)LockBox->SmramBuffer, (UINTN)LockBox->Length);
}
}
//
// Done
//
return EFI_SUCCESS;
}
/**
This function will save confidential information to lockbox.
@param Guid the guid to identify the confidential information
@param Buffer the address of the confidential information
@param Length the length of the confidential information
@retval RETURN_SUCCESS the information is saved successfully.
@retval RETURN_INVALID_PARAMETER the Guid is NULL, or Buffer is NULL, or Length is 0
@retval RETURN_ALREADY_STARTED the requested GUID already exist.
@retval RETURN_OUT_OF_RESOURCES no enough resource to save the information.
@retval RETURN_ACCESS_DENIED it is too late to invoke this interface
@retval RETURN_NOT_STARTED it is too early to invoke this interface
@retval RETURN_UNSUPPORTED the service is not supported by implementaion.
**/
RETURN_STATUS
EFIAPI
SaveLockBox (
IN GUID *Guid,
IN VOID *Buffer,
IN UINTN Length
)
{
ASSERT (FALSE);
//
// No support to save at PEI phase
//
return RETURN_UNSUPPORTED;
}
/**
This function will set lockbox attributes.
@param Guid the guid to identify the confidential information
@param Attributes the attributes of the lockbox
@retval RETURN_SUCCESS the information is saved successfully.
@retval RETURN_INVALID_PARAMETER attributes is invalid.
@retval RETURN_NOT_FOUND the requested GUID not found.
@retval RETURN_ACCESS_DENIED it is too late to invoke this interface
@retval RETURN_NOT_STARTED it is too early to invoke this interface
@retval RETURN_UNSUPPORTED the service is not supported by implementaion.
**/
RETURN_STATUS
EFIAPI
SetLockBoxAttributes (
IN GUID *Guid,
IN UINT64 Attributes
)
{
ASSERT (FALSE);
//
// No support to save at PEI phase
//
return RETURN_UNSUPPORTED;
}
/**
This function will update confidential information to lockbox.
@param Guid the guid to identify the original confidential information
@param Offset the offset of the original confidential information
@param Buffer the address of the updated confidential information
@param Length the length of the updated confidential information
@retval RETURN_SUCCESS the information is saved successfully.
@retval RETURN_INVALID_PARAMETER the Guid is NULL, or Buffer is NULL, or Length is 0.
@retval RETURN_NOT_FOUND the requested GUID not found.
@retval RETURN_BUFFER_TOO_SMALL for lockbox without attribute LOCK_BOX_ATTRIBUTE_RESTORE_IN_S3_ONLY,
the original buffer to too small to hold new information.
@retval RETURN_OUT_OF_RESOURCES for lockbox with attribute LOCK_BOX_ATTRIBUTE_RESTORE_IN_S3_ONLY,
no enough resource to save the information.
@retval RETURN_ACCESS_DENIED it is too late to invoke this interface
@retval RETURN_NOT_STARTED it is too early to invoke this interface
@retval RETURN_UNSUPPORTED the service is not supported by implementaion.
**/
RETURN_STATUS
EFIAPI
UpdateLockBox (
IN GUID *Guid,
IN UINTN Offset,
IN VOID *Buffer,
IN UINTN Length
)
{
ASSERT (FALSE);
//
// No support to update at PEI phase
//
return RETURN_UNSUPPORTED;
}
/**
This function will restore confidential information from lockbox.
@param Guid the guid to identify the confidential information
@param Buffer the address of the restored confidential information
NULL means restored to original address, Length MUST be NULL at same time.
@param Length the length of the restored confidential information
@retval RETURN_SUCCESS the information is restored successfully.
@retval RETURN_INVALID_PARAMETER the Guid is NULL, or one of Buffer and Length is NULL.
@retval RETURN_WRITE_PROTECTED Buffer and Length are NULL, but the LockBox has no
LOCK_BOX_ATTRIBUTE_RESTORE_IN_PLACE attribute.
@retval RETURN_BUFFER_TOO_SMALL the Length is too small to hold the confidential information.
@retval RETURN_NOT_FOUND the requested GUID not found.
@retval RETURN_NOT_STARTED it is too early to invoke this interface
@retval RETURN_ACCESS_DENIED not allow to restore to the address
@retval RETURN_UNSUPPORTED the service is not supported by implementaion.
**/
RETURN_STATUS
EFIAPI
RestoreLockBox (
IN GUID *Guid,
IN VOID *Buffer, OPTIONAL
IN OUT UINTN *Length OPTIONAL
)
{
EFI_STATUS Status;
EFI_PEI_SMM_COMMUNICATION_PPI *SmmCommunicationPpi;
EFI_SMM_LOCK_BOX_PARAMETER_RESTORE *LockBoxParameterRestore;
EFI_SMM_COMMUNICATE_HEADER *CommHeader;
UINT8 CommBuffer[sizeof(EFI_GUID) + sizeof(UINT64) + sizeof(EFI_SMM_LOCK_BOX_PARAMETER_RESTORE)];
UINTN CommSize;
UINT64 MessageLength;
//
// Please aware that there is UINTN in EFI_SMM_COMMUNICATE_HEADER. It might be UINT64 in DXE, while it is UINT32 in PEI.
// typedef struct {
// EFI_GUID HeaderGuid;
// UINTN MessageLength;
// UINT8 Data[1];
// } EFI_SMM_COMMUNICATE_HEADER;
//
DEBUG ((DEBUG_INFO, "SmmLockBoxPeiLib RestoreLockBox - Enter\n"));
//
// Basic check
//
if ((Guid == NULL) ||
((Buffer == NULL) && (Length != NULL)) ||
((Buffer != NULL) && (Length == NULL))) {
return EFI_INVALID_PARAMETER;
}
//
// Get needed resource
//
Status = PeiServicesLocatePpi (
&gEfiPeiSmmCommunicationPpiGuid,
0,
NULL,
(VOID **)&SmmCommunicationPpi
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_INFO, "SmmLockBoxPeiLib LocatePpi - (%r)\n", Status));
Status = InternalRestoreLockBoxFromSmram (Guid, Buffer, Length);
DEBUG ((DEBUG_INFO, "SmmLockBoxPeiLib RestoreLockBox - Exit (%r)\n", Status));
return Status;
}
//
// Prepare parameter
//
CommHeader = (EFI_SMM_COMMUNICATE_HEADER *)&CommBuffer[0];
CopyMem (&CommHeader->HeaderGuid, &gEfiSmmLockBoxCommunicationGuid, sizeof(gEfiSmmLockBoxCommunicationGuid));
if ((sizeof(UINTN) == sizeof(UINT32)) && (FeaturePcdGet (PcdDxeIplSwitchToLongMode)) ) {
MessageLength = sizeof(*LockBoxParameterRestore);
CopyMem (&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, MessageLength)], &MessageLength, sizeof(MessageLength));
} else {
CommHeader->MessageLength = sizeof(*LockBoxParameterRestore);
}
DEBUG ((DEBUG_INFO, "SmmLockBoxPeiLib CommBuffer - %x\n", &CommBuffer[0]));
if ((sizeof(UINTN) == sizeof(UINT32)) && (FeaturePcdGet (PcdDxeIplSwitchToLongMode)) ) {
LockBoxParameterRestore = (EFI_SMM_LOCK_BOX_PARAMETER_RESTORE *)&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, MessageLength) + sizeof(UINT64)];
} else {
LockBoxParameterRestore = (EFI_SMM_LOCK_BOX_PARAMETER_RESTORE *)&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, MessageLength) + sizeof(UINTN)];
}
DEBUG ((DEBUG_INFO, "SmmLockBoxPeiLib LockBoxParameterRestore - %x\n", LockBoxParameterRestore));
LockBoxParameterRestore->Header.Command = EFI_SMM_LOCK_BOX_COMMAND_RESTORE;
LockBoxParameterRestore->Header.DataLength = sizeof(*LockBoxParameterRestore);
LockBoxParameterRestore->Header.ReturnStatus = (UINT64)-1;
if (Guid != 0) {
CopyMem (&LockBoxParameterRestore->Guid, Guid, sizeof(*Guid));
} else {
ZeroMem (&LockBoxParameterRestore->Guid, sizeof(*Guid));
}
LockBoxParameterRestore->Buffer = (EFI_PHYSICAL_ADDRESS)(UINTN)Buffer;
if (Length != NULL) {
LockBoxParameterRestore->Length = (EFI_PHYSICAL_ADDRESS)*Length;
} else {
LockBoxParameterRestore->Length = 0;
}
//
// Send command
//
CommSize = sizeof(CommBuffer);
Status = SmmCommunicationPpi->Communicate (
SmmCommunicationPpi,
&CommBuffer[0],
&CommSize
);
if (Status == EFI_NOT_STARTED) {
//
// Pei SMM communication not ready yet, so we access SMRAM directly
//
DEBUG ((DEBUG_INFO, "SmmLockBoxPeiLib Communicate - (%r)\n", Status));
Status = InternalRestoreLockBoxFromSmram (Guid, Buffer, Length);
LockBoxParameterRestore->Header.ReturnStatus = (UINT64)Status;
if (Length != NULL) {
LockBoxParameterRestore->Length = (UINT64)*Length;
}
}
if (Length != NULL) {
*Length = (UINTN)LockBoxParameterRestore->Length;
}
Status = (EFI_STATUS)LockBoxParameterRestore->Header.ReturnStatus;
if (Status != EFI_SUCCESS) {
// Need or MAX_BIT, because there might be case that SMM is X64 while PEI is IA32.
Status |= MAX_BIT;
}
DEBUG ((DEBUG_INFO, "SmmLockBoxPeiLib RestoreLockBox - Exit (%r)\n", Status));
//
// Done
//
return Status;
}
/**
This function will restore confidential information from all lockbox which have RestoreInPlace attribute.
@retval RETURN_SUCCESS the information is restored successfully.
@retval RETURN_NOT_STARTED it is too early to invoke this interface
@retval RETURN_UNSUPPORTED the service is not supported by implementaion.
**/
RETURN_STATUS
EFIAPI
RestoreAllLockBoxInPlace (
VOID
)
{
EFI_STATUS Status;
EFI_PEI_SMM_COMMUNICATION_PPI *SmmCommunicationPpi;
EFI_SMM_LOCK_BOX_PARAMETER_RESTORE_ALL_IN_PLACE *LockBoxParameterRestoreAllInPlace;
EFI_SMM_COMMUNICATE_HEADER *CommHeader;
UINT8 CommBuffer[sizeof(EFI_GUID) + sizeof(UINT64) + sizeof(EFI_SMM_LOCK_BOX_PARAMETER_RESTORE_ALL_IN_PLACE)];
UINTN CommSize;
UINT64 MessageLength;
//
// Please aware that there is UINTN in EFI_SMM_COMMUNICATE_HEADER. It might be UINT64 in DXE, while it is UINT32 in PEI.
// typedef struct {
// EFI_GUID HeaderGuid;
// UINTN MessageLength;
// UINT8 Data[1];
// } EFI_SMM_COMMUNICATE_HEADER;
//
DEBUG ((DEBUG_INFO, "SmmLockBoxPeiLib RestoreAllLockBoxInPlace - Enter\n"));
//
// Get needed resource
//
Status = PeiServicesLocatePpi (
&gEfiPeiSmmCommunicationPpiGuid,
0,
NULL,
(VOID **)&SmmCommunicationPpi
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_INFO, "SmmLockBoxPeiLib LocatePpi - (%r)\n", Status));
Status = InternalRestoreAllLockBoxInPlaceFromSmram ();
DEBUG ((DEBUG_INFO, "SmmLockBoxPeiLib RestoreAllLockBoxInPlace - Exit (%r)\n", Status));
return Status;
}
//
// Prepare parameter
//
CommHeader = (EFI_SMM_COMMUNICATE_HEADER *)&CommBuffer[0];
CopyMem (&CommHeader->HeaderGuid, &gEfiSmmLockBoxCommunicationGuid, sizeof(gEfiSmmLockBoxCommunicationGuid));
if ((sizeof(UINTN) == sizeof(UINT32)) && (FeaturePcdGet (PcdDxeIplSwitchToLongMode)) ) {
MessageLength = sizeof(*LockBoxParameterRestoreAllInPlace);
CopyMem (&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, MessageLength)], &MessageLength, sizeof(MessageLength));
} else {
CommHeader->MessageLength = sizeof(*LockBoxParameterRestoreAllInPlace);
}
if ((sizeof(UINTN) == sizeof(UINT32)) && (FeaturePcdGet (PcdDxeIplSwitchToLongMode)) ) {
LockBoxParameterRestoreAllInPlace = (EFI_SMM_LOCK_BOX_PARAMETER_RESTORE_ALL_IN_PLACE *)&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, MessageLength) + sizeof(UINT64)];
} else {
LockBoxParameterRestoreAllInPlace = (EFI_SMM_LOCK_BOX_PARAMETER_RESTORE_ALL_IN_PLACE *)&CommBuffer[OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, MessageLength) + sizeof(UINTN)];
}
LockBoxParameterRestoreAllInPlace->Header.Command = EFI_SMM_LOCK_BOX_COMMAND_RESTORE_ALL_IN_PLACE;
LockBoxParameterRestoreAllInPlace->Header.DataLength = sizeof(*LockBoxParameterRestoreAllInPlace);
LockBoxParameterRestoreAllInPlace->Header.ReturnStatus = (UINT64)-1;
//
// Send command
//
CommSize = sizeof(CommBuffer);
Status = SmmCommunicationPpi->Communicate (
SmmCommunicationPpi,
&CommBuffer[0],
&CommSize
);
if (Status == EFI_NOT_STARTED) {
//
// Pei SMM communication not ready yet, so we access SMRAM directly
//
DEBUG ((DEBUG_INFO, "SmmLockBoxPeiLib Communicate - (%r)\n", Status));
Status = InternalRestoreAllLockBoxInPlaceFromSmram ();
LockBoxParameterRestoreAllInPlace->Header.ReturnStatus = (UINT64)Status;
}
ASSERT_EFI_ERROR (Status);
Status = (EFI_STATUS)LockBoxParameterRestoreAllInPlace->Header.ReturnStatus;
if (Status != EFI_SUCCESS) {
// Need or MAX_BIT, because there might be case that SMM is X64 while PEI is IA32.
Status |= MAX_BIT;
}
DEBUG ((DEBUG_INFO, "SmmLockBoxPeiLib RestoreAllLockBoxInPlace - Exit (%r)\n", Status));
//
// Done
//
return Status;
}
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