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alder_lake_bios/Intel/AlderLake/AlderLakePlatSamplePkg/Features/Hsti/HstiResultDxe/HstiResultDxe.c

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/** @file
This file is SampleCode for a DXE driver to allow for caching of HSTI
test results to eliminate the need for testing on every boot.
;******************************************************************************
;* Copyright (c) 2018 , Insyde Software Corporation. All Rights Reserved.
;*
;* You may not reproduce, distribute, publish, display, perform, modify, adapt,
;* transmit, broadcast, present, recite, release, license or otherwise exploit
;* any part of this publication in any form, by any means, without the prior
;* written permission of Insyde Software Corporation.
;*
;******************************************************************************
@copyright
INTEL CONFIDENTIAL
Copyright 2015 - 2017 Intel Corporation.
The source code contained or described herein and all documents related to the
source code ("Material") are owned by Intel Corporation or its suppliers or
licensors. Title to the Material remains with Intel Corporation or its suppliers
and licensors. The Material may contain trade secrets and proprietary and
confidential information of Intel Corporation and its suppliers and licensors,
and is protected by worldwide copyright and trade secret laws and treaty
provisions. No part of the Material may be used, copied, reproduced, modified,
published, uploaded, posted, transmitted, distributed, or disclosed in any way
without Intel's prior express written permission.
No license under any patent, copyright, trade secret or other intellectual
property right is granted to or conferred upon you by disclosure or delivery
of the Materials, either expressly, by implication, inducement, estoppel or
otherwise. Any license under such intellectual property rights must be
express and approved by Intel in writing.
Unless otherwise agreed by Intel in writing, you may not remove or alter
this notice or any other notice embedded in Materials by Intel or
Intel's suppliers or licensors in any way.
This file contains a 'Sample Driver' and is licensed as such under the terms
of your license agreement with Intel or your vendor. This file may be modified
by the user, subject to the additional terms of the license agreement.
@par Specification
**/
#include "HstiResultDxe.h"
DXE_SI_POLICY_PROTOCOL *mSiPolicyData;
CONFIGURATION_CHANGE mConfigChanged;
/**
Handler to Save HSTI results for publishing on subsequent boots
@param[in] Event Event whose notification function is being invoked
@param[in] Context Pointer to the notification function's context
**/
VOID
EFIAPI
SaveConfigurationChange (
EFI_EVENT Event,
VOID *Context
)
{
UINT32 VarAttributes;
UINTN VarSize;
CONFIGURATION_CHANGE ConfigChanged;
VOID *Interface;
EFI_STATUS Status;
//
// Check whether we are running for first time or actually when signaled
//
Status = gBS->LocateProtocol (&gPlatformConfigChangeProtocolGuid, NULL, &Interface);
if (EFI_ERROR (Status)) {
return;
}
ConfigChanged.ConfigChangeType = SETUP_OPTION_CHANGE;
VarSize = sizeof(CONFIGURATION_CHANGE);
VarAttributes = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS;
gRT->SetVariable (
PLATFORM_CONFIGURATION_CHANGE,
&gPlatformConfigChangeGuid,
VarAttributes,
VarSize,
&ConfigChanged
);
if (Event != NULL) {
gBS->CloseEvent (Event);
}
}
/**
Handler to Save HSTI results for publishing on subsequent boots
@param[in] Event Event whose notification function is being invoked
@param[in] Context Pointer to the notification function's context
**/
VOID
EFIAPI
SaveResults (
EFI_EVENT Event,
VOID *Context
)
{
UINT32 VarAttributes;
UINTN VarSize;
EFI_STATUS Status;
VOID *Interface;
Status = EFI_SUCCESS;
//
// Check whether we are running for first time or actually when signaled
//
Status = gBS->LocateProtocol (&gHstiPublishCompleteProtocolGuid, NULL, &Interface);
if (EFI_ERROR (Status)) {
return;
}
if (mSiPolicyData->Hsti == NULL) {
return;
}
if(( mConfigChanged.ConfigChangeType != NO_CONFIG_CHANGE)){
VarAttributes = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS;
VarSize = mSiPolicyData->HstiSize;
gRT->SetVariable (
HSTI_STORAGE_NAME,
&gHstiStoredResultsGuid,
VarAttributes,
VarSize,
mSiPolicyData->Hsti
);
//
// Need to clear out the previous change so we can use cached results again
//
mConfigChanged.ConfigChangeType = NO_CONFIG_CHANGE;
VarSize = sizeof(CONFIGURATION_CHANGE);
VarAttributes = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS;
Status = gRT->SetVariable (
PLATFORM_CONFIGURATION_CHANGE,
&gPlatformConfigChangeGuid,
VarAttributes,
VarSize,
&mConfigChanged
);
}
if (Event != NULL) {
gBS->CloseEvent (Event);
}
}
//[-start-180724-IB11790262-add]//
/**
Handler to trigger HSTI result update when user attempt to enter SCU
@param[in] Event Event whose notification function is being invoked
@param[in] Context Pointer to the notification function's context
**/
VOID
EFIAPI
EnteringSetupUtility (
EFI_EVENT Event,
VOID *Context
)
{
EFI_STATUS Status;
EFI_SETUP_UTILITY_APPLICATION_PROTOCOL *SetupUtilityApp;
EFI_HANDLE Handle;
Status = EFI_SUCCESS;
Handle = NULL;
//
// Check whether we are running for first time or actually when signaled
//
Status = gBS->LocateProtocol (&gEfiSetupUtilityApplicationProtocolGuid, NULL, &SetupUtilityApp);
if (EFI_ERROR (Status)) {
return;
}
if (SetupUtilityApp->VfrDriverState == InitializeSetupUtility) {
gBS->InstallProtocolInterface (&Handle, &gPlatformConfigChangeProtocolGuid, EFI_NATIVE_INTERFACE, NULL);
if (Event != NULL) {
gBS->CloseEvent (Event);
}
}
}
//[-end-180724-IB11790262-add]//
/**
The driver's entry point.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval other Some error occurs when executing this entry point.
**/
EFI_STATUS
EFIAPI
DriverEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
VOID *Registration;
EFI_STATUS Status;
UINT32 VarAttributes;
ADAPTER_INFO_PLATFORM_SECURITY *Hsti;
UINTN VarSize;
EDKII_VARIABLE_LOCK_PROTOCOL *VariableLockProtocol;
MEMORY_PLATFORM_DATA_HOB *MemoryPlatformData;
EFI_HOB_GUID_TYPE *GuidHob;
MemoryPlatformData = NULL;
Hsti = NULL;
ZeroMem(&mConfigChanged,sizeof(CONFIGURATION_CHANGE));
//
// Locate DxeSiPolicyProtocolGuid protocol instance and assign it to a global variable
//
Status = gBS->LocateProtocol (&gDxeSiPolicyProtocolGuid, NULL, (VOID **) &mSiPolicyData);
if (EFI_ERROR (Status)) {
DEBUG((EFI_D_ERROR,"Failed to locate DxeSiPolicyProtocolGuid Protocol\n"));
ASSERT_EFI_ERROR (Status);
return Status;
}
//
// Register protocol notification function for saving results
//
EfiCreateProtocolNotifyEvent (
&gHstiPublishCompleteProtocolGuid,
TPL_NOTIFY,
SaveResults,
NULL,
&Registration
);
//
// Register protocol notification function for saving configuration change
//
EfiCreateProtocolNotifyEvent (
&gPlatformConfigChangeProtocolGuid,
TPL_NOTIFY,
SaveConfigurationChange,
NULL,
&Registration
);
//[-start-180724-IB11790262-add]//
//
// Register protocol notification function to trigger SETUP_OPTION_CHANGE when user entering SCU
//
EfiCreateProtocolNotifyEvent (
&gEfiSetupUtilityApplicationProtocolGuid,
TPL_NOTIFY,
EnteringSetupUtility,
NULL,
&Registration
);
//[-end-180724-IB11790262-add]//
VarAttributes = 0;
VarSize = sizeof(CONFIGURATION_CHANGE);
Status = gRT->GetVariable (
PLATFORM_CONFIGURATION_CHANGE,
&gPlatformConfigChangeGuid,
&VarAttributes,
&VarSize,
&mConfigChanged
);
if (EFI_ERROR(Status)) {
mConfigChanged.ConfigChangeType = FIRST_BOOT;
}
VarAttributes = 0;
VarSize = 0;
Status = gRT->GetVariable (
HSTI_STORAGE_NAME,
&gHstiStoredResultsGuid,
&VarAttributes,
&VarSize,
Hsti
);
if (EFI_ERROR(Status)) {
Hsti = (ADAPTER_INFO_PLATFORM_SECURITY *) AllocatePool(VarSize + 1);
if (((UINTN) Hsti & BIT0) == 0){
Hsti = (ADAPTER_INFO_PLATFORM_SECURITY*)((UINT8 *) Hsti + 1);
}
Status = gRT->GetVariable (
HSTI_STORAGE_NAME,
&gHstiStoredResultsGuid,
&VarAttributes,
&VarSize,
Hsti
);
}
GuidHob = NULL;
MemoryPlatformData = NULL;
GuidHob = GetFirstGuidHob (&gSiMemoryPlatformDataGuid);
ASSERT (GuidHob != NULL);
if (GuidHob != NULL) {
MemoryPlatformData = (MEMORY_PLATFORM_DATA_HOB *) GET_GUID_HOB_DATA (GuidHob);
}
if (MemoryPlatformData != NULL) {
DEBUG ((EFI_D_INFO, "Hsti MrcBootMode = %x\n", MemoryPlatformData->Data.BootMode));
} else {
DEBUG ((EFI_D_ERROR, "Hsti get gSiMemoryPlatformDataGuid HOB fails\n"));
}
//
// Need to not use cached results if any setup option changed on previous boot or any major
// HW change happened that is significant enough to trigger MRC retraining
//
if(!EFI_ERROR (Status) &&
(mConfigChanged.ConfigChangeType == NO_CONFIG_CHANGE) &&
((MemoryPlatformData != NULL) && (MemoryPlatformData->Data.BootMode != bmCold))) {
mSiPolicyData->Hsti = Hsti;
mSiPolicyData->HstiSize = VarSize;
//
// Need to lock this variable to prevent changing cached results by some malicious software
//
Status = gBS->LocateProtocol (&gEdkiiVariableLockProtocolGuid, NULL, (VOID **)&VariableLockProtocol);
if (!EFI_ERROR (Status)) {
Status = VariableLockProtocol->RequestToLock (
VariableLockProtocol,
HSTI_STORAGE_NAME,
&gHstiStoredResultsGuid
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "HSTI cached results were unable to be locked: Status = %r\n", Status));
return Status;
}
}
}
return EFI_SUCCESS;
}
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