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MdeModulePkg: Add VarCheckHiiLibMmDependency library.
VarCheckHiiLibMmDependency retrieve data (mVarCheckHiiBin) at the end of the DXE phase, and pass the acquired data to the VarCheckHiiLibStandaloneMm through a communication protocol. Cc: Liming Gao <gaoliming@byosoft.com.cn> Cc: Rahul Kumar <rahul1.kumar@intel.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Star Zeng <star.zeng@intel.com> Cc: Hongbin1 Zhang <hongbin1.zhang@intel.com> Cc: Wei6 Xu <wei6.xu@intel.com> Cc: Dun Tan <dun.tan@intel.com> Cc: Dandan Bi <dandan.bi@intel.com> Signed-off-by: Yuanhao Xie <yuanhao.xie@intel.com>
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@ -51,4 +51,11 @@ DumpVarCheckHii (
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IN UINTN VarCheckHiiBinSize
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);
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#define VAR_CHECK_RECEIVED_HII_BIN_HANDLER_GUID \
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{ \
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0xe63095c7, 0x2b34, 0x4163, { 0x80, 0x3d, 0xc8, 0x3c, 0x2e, 0xd6, 0xa0, 0x37 } \
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}
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extern EFI_GUID gVarCheckReceivedHiiBinHandlerGuid;
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#endif
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@ -7,6 +7,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "VarCheckHiiGen.h"
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#include "VarCheckHii.h"
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VAR_CHECK_HII_VARIABLE_HEADER *mVarCheckHiiBin = NULL;
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UINTN mVarCheckHiiBinSize = 0;
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138
MdeModulePkg/Library/VarCheckHiiLib/VarCheckHiiLibMmDependency.c
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138
MdeModulePkg/Library/VarCheckHiiLib/VarCheckHiiLibMmDependency.c
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@ -0,0 +1,138 @@
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/** @file
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VarCheckHiiLib Dependency library.
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It sends HII variable checking data to SMM via the MM Communication protocol.
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Copyright (c) 2024, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Uefi.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/DebugLib.h>
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#include <Protocol/MmCommunication.h>
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#include <Guid/PiSmmCommunicationRegionTable.h>
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#include "InternalVarCheckStructure.h"
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#include "VarCheckHiiGen.h"
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#include "VarCheckHii.h"
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#include <Library/UefiLib.h>
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#include <Guid/EventGroup.h>
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extern VAR_CHECK_HII_VARIABLE_HEADER *mVarCheckHiiBin;
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extern UINTN mVarCheckHiiBinSize;
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EFI_GUID gVarCheckReceivedHiiBinHandlerGuid = VAR_CHECK_RECEIVED_HII_BIN_HANDLER_GUID;
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/**
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Sends HII variable checking data to SMM at the end of DXE phase.
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This function is triggered by the End of DXE. It locates a memory
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region for MM communication, prepares the communication buffer with HII variable
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checking data, and communicates with SMM using the MM Communication protocol.
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@param[in] Event Event whose notification function is being invoked.
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@param[in] Context The pointer to the notification function's context, which
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is implementation-dependent.
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**/
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VOID
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EFIAPI
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VarCheckHiiLibSmmEndOfDxeNotify (
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IN EFI_EVENT Event,
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IN VOID *Context
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)
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{
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EFI_STATUS Status;
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EFI_MM_COMMUNICATION_PROTOCOL *MmCommunication;
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EFI_MM_COMMUNICATE_HEADER *CommHeader;
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EDKII_PI_SMM_COMMUNICATION_REGION_TABLE *PiSmmCommunicationRegionTable;
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EFI_MEMORY_DESCRIPTOR *MmCommMemRegion;
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UINTN CommBufferSize;
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UINTN Index;
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VAR_CHECK_HII_VARIABLE_HEADER *VarCheckHiiVariable;
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DEBUG ((DEBUG_INFO, "%a starts.\n", __func__));
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VarCheckHiiGen ();
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if ((mVarCheckHiiBinSize == 0) || (mVarCheckHiiBin == NULL)) {
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DEBUG ((DEBUG_INFO, "%a: mVarCheckHiiBinSize = 0x%x, mVarCheckHiiBin = 0x%x \n", __func__, mVarCheckHiiBinSize, mVarCheckHiiBin));
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return;
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}
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//
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// Retrieve SMM Communication Region Table
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//
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Status = EfiGetSystemConfigurationTable (
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&gEdkiiPiSmmCommunicationRegionTableGuid,
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(VOID **)&PiSmmCommunicationRegionTable
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((DEBUG_ERROR, "%a: Failed to get PiSmmCommunicationRegionTable - %r\n", __func__, Status));
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return;
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}
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ASSERT (PiSmmCommunicationRegionTable != NULL);
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//
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// Find a memory region for MM communication
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//
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CommBufferSize = 0;
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MmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *)(PiSmmCommunicationRegionTable + 1);
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for (Index = 0; Index < PiSmmCommunicationRegionTable->NumberOfEntries; Index++) {
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if (MmCommMemRegion->Type == EfiConventionalMemory) {
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CommBufferSize = EFI_PAGES_TO_SIZE ((UINTN)MmCommMemRegion->NumberOfPages);
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if (CommBufferSize >= (sizeof (EFI_MM_COMMUNICATE_HEADER) + mVarCheckHiiBinSize)) {
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break;
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}
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}
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MmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *)((UINT8 *)MmCommMemRegion + PiSmmCommunicationRegionTable->DescriptorSize);
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}
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if (Index >= PiSmmCommunicationRegionTable->NumberOfEntries) {
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DEBUG ((DEBUG_ERROR, "%a: Failed to find a suitable memory region for MM communication!\n", __func__));
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return;
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}
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//
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// Prepare the communication buffer
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//
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CommHeader = (EFI_MM_COMMUNICATE_HEADER *)(UINTN)MmCommMemRegion->PhysicalStart;
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CommBufferSize = OFFSET_OF (EFI_MM_COMMUNICATE_HEADER, Data) + mVarCheckHiiBinSize;
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ZeroMem (CommHeader, CommBufferSize);
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CopyGuid (&CommHeader->HeaderGuid, &gVarCheckReceivedHiiBinHandlerGuid);
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CommHeader->MessageLength = mVarCheckHiiBinSize;
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VarCheckHiiVariable = (VAR_CHECK_HII_VARIABLE_HEADER *)(CommHeader->Data);
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CopyMem (VarCheckHiiVariable, mVarCheckHiiBin, mVarCheckHiiBinSize);
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//
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// Locate the MM Communication protocol and signal SMI
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//
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Status = gBS->LocateProtocol (&gEfiMmCommunicationProtocolGuid, NULL, (VOID **)&MmCommunication);
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if (!EFI_ERROR (Status)) {
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Status = MmCommunication->Communicate (MmCommunication, CommHeader, &CommBufferSize);
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DEBUG ((DEBUG_INFO, "%a: Communicate to smm environment = %r\n", __func__, Status));
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} else {
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DEBUG ((DEBUG_ERROR, "%a: Failed to locate MmCommunication protocol - %r\n", __func__, Status));
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return;
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}
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DEBUG ((DEBUG_INFO, "%a ends.\n", __func__));
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return;
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}
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/**
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Constructor function of the VarCheckHiiLibMmDependency.
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@param ImageHandle The firmware allocated handle for the EFI image.
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@param SystemTable A pointer to the Management mode System Table.
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@retval EFI_SUCCESS The protocol was successfully installed into the DXE database.
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**/
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EFI_STATUS
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EFIAPI
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VarCheckHiiLibMmDependencyConstructor (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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EFI_EVENT Event;
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DEBUG ((DEBUG_INFO, "%a starts.\n", __func__));
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Status = gBS->CreateEventEx (EVT_NOTIFY_SIGNAL, TPL_NOTIFY, VarCheckHiiLibSmmEndOfDxeNotify, NULL, &gEfiEndOfDxeEventGroupGuid, &Event);
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ASSERT_EFI_ERROR (Status);
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DEBUG ((DEBUG_INFO, "%a ends.\n", __func__));
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return Status;
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}
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@ -0,0 +1,53 @@
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## @file
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# VarCheckHiiLib Dependency library.
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#
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# Copyright (c) 2024, Intel Corporation. All rights reserved.<BR>
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#
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# SPDX-License-Identifier: BSD-2-Clause-Patent
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#
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##
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[Defines]
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INF_VERSION = 0x0001001A
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BASE_NAME = VarCheckHiiLibMmDependency
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FILE_GUID = DF61C3DC-B08C-44B7-B771-9E4BCBBE0811
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MODULE_TYPE = DXE_DRIVER
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LIBRARY_CLASS = NULL
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CONSTRUCTOR = VarCheckHiiLibMmDependencyConstructor
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[Sources]
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VarCheckHiiLibMmDependency.c
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VarCheckHii.h
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VarCheckHiiGenFromFv.c
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VarCheckHiiGenFromHii.c
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VarCheckHiiGen.c
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VarCheckHiiGen.h
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InternalVarCheckStructure.h
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[Packages]
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MdePkg/MdePkg.dec
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MdeModulePkg/MdeModulePkg.dec
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[LibraryClasses]
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DebugLib
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UefiBootServicesTableLib
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BaseLib
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BaseMemoryLib
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MemoryAllocationLib
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UefiLib
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PcdLib
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[Guids]
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gEdkiiIfrBitVarstoreGuid
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gEfiEndOfDxeEventGroupGuid
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gEdkiiPiSmmCommunicationRegionTableGuid
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[Protocols]
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gEfiMmEndOfDxeProtocolGuid
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gEfiMmCommunicationProtocolGuid
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gEfiFirmwareVolume2ProtocolGuid ## SOMETIMES_CONSUMES
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gEfiFirmwareVolumeBlock2ProtocolGuid ## SOMETIMES_CONSUMES
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gEfiHiiDatabaseProtocolGuid ## SOMETIMES_CONSUMES
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[Pcd]
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gEfiMdeModulePkgTokenSpaceGuid.PcdVarCheckVfrDriverGuidArray ## SOMETIMES_CONSUMES
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