[edk2-devel] [v7 v7] IntelSiliconPkg-Vtd: A new PMR interface
Ni, Ray
ray.ni at intel.com
Thu Oct 17 05:10:14 UTC 2019
Reviewed-by: Ray Ni <ray.ni at intel.com>
> -----Original Message-----
> From: Wang, Iwen Evelyn <iwen.evelyn.wang at intel.com>
> Sent: Thursday, October 17, 2019 11:21 AM
> To: devel at edk2.groups.io
> Cc: Huang, Jenny <jenny.huang at intel.com>; Shih, More
> <more.shih at intel.com>; Ni, Ray <ray.ni at intel.com>; Chaganty, Rangasai V
> <rangasai.v.chaganty at intel.com>; Yao, Jiewen <jiewen.yao at intel.com>
> Subject: [v7 v7] IntelSiliconPkg-Vtd: A new PMR interface
>
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1770
>
> 1) IOMMU PMR feature should be generic to support different hardware
> architecture. Platforms may request no overlap between PMR regions and
> system reserve memory. Create an interface to control PLMR/PHMR regions.
> It allows silicon code to adjust PLMR/PHMR region base on the project needs.
>
> 2) A new GetVtdPmrAlignmentLib for silicon code to get PMR alignment
> values.
>
> Signed-off-by: Evelyn Wang <iwen.evelyn.wang at intel.com>
> Cc: Jenny Huang <jenny.huang at intel.com>
> Cc: More Shih <more.shih at intel.com>
> Cc: Ray Ni <ray.ni at intel.com>
> Cc: Rangasai V Chaganty <rangasai.v.chaganty at intel.com>
> Cc: Jiewen Yao <jiewen.yao at intel.com>
>
> ---
> In V2:
> 1) Fixed the EFIAPI is missing in library API issue
> 2) Logs will be provided to make sure the backwards compatibility
> 3) Replaced BIT0 with EFI_ACPI_DMAR_DRHD_FLAGS_INCLUDE_PCI_ALL
> 4) Renamed GetVtdPmrAlignmentLib to PeiGetVtdPmrAlignmentLib
> 5) Fixed the indent in IntelVTdPmrPei.c
> 6) Follow VTd spec to define the data type of the SYSTEM_MEM_INFO_HOB
> Applied few changes coordinately
>
> ---
> In V3:
> 1) Fixed the EFIAPI is missing in library API issue
> 2) Fixed the S3 resume assert
>
> ---
> In V4:
> Fixed the missing EFIAPI in .h file and added few more comments
>
> ---
> In V5:
> In order to align with the future planning, changed the hob name from
> SYSTEM_MEM_INFO_HOB to VTD_PMR_INFO_HOB
>
> ---
> In V6:
> 1) Revised comments
> 2) Moved VtdPmrInfoHob.h under Guid folder
> 3) Separated to few commits
>
> ---
> In V7:
> 1) Only the functions declared in library header file should have EFIAPI
> 2) Added a few comments to avoid confusion
> 3) Fixed a case error
> ---
> Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmr.c
> | 4 ++--
> Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei.c
> | 84
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> +++-----------------------
>
> Silicon/Intel/IntelSiliconPkg/Library/PeiGetVtdPmrAlignmentLib/PeiGetVtdP
> mrAlignmentLib.c | 164
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> ++++++++++++++++++++++++++++++++++++++++++++++++
>
> Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei.in
> f | 5 ++++-
> Silicon/Intel/IntelSiliconPkg/Include/Guid/VtdPmrInfoHob.h
> | 29 +++++++++++++++++++++++++++++
> Silicon/Intel/IntelSiliconPkg/Include/Library/PeiGetVtdPmrAlignmentLib.h
> | 22 ++++++++++++++++++++++
> Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec | 11
> +++++++++--
> Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dsc | 3 ++-
>
> Silicon/Intel/IntelSiliconPkg/Library/PeiGetVtdPmrAlignmentLib/PeiGetVtdP
> mrAlignmentLib.inf | 32 ++++++++++++++++++++++++++++++++
> 9 files changed, 325 insertions(+), 29 deletions(-)
>
> diff --git
> a/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmr.c
> b/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmr.c
> index 37283f0fab..9103e53922 100644
> ---
> a/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmr.c
> +++ b/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdP
> +++ mr.c
> @@ -1,6 +1,6 @@
> /** @file
>
> - Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
> + Copyright (c) 2017 - 2019, Intel Corporation. All rights
> + reserved.<BR>
>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
> @@ -294,7 +294,7 @@ SetDmaProtectedRange (
> UINTN Index;
> EFI_STATUS Status;
>
> - DEBUG ((DEBUG_INFO, "SetDmaProtectedRange(0x%lx) - [0x%x, 0x%x]
> [0x%lx, 0x%lx]\n", EngineMask, LowMemoryBase, LowMemoryLength,
> HighMemoryBase, HighMemoryLength));
> + DEBUG ((DEBUG_INFO, "SetDmaProtectedRange(0x%lx) - [0x%x, 0x%x]
> + [0x%016lx, 0x%016lx]\n", EngineMask, LowMemoryBase,
> LowMemoryLength,
> + HighMemoryBase, HighMemoryLength));
>
> for (Index = 0; Index < VTdInfo->VTdEngineCount; Index++) {
> if ((EngineMask & LShiftU64(1, Index)) == 0) { diff --git
> a/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei
> .c
> b/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei
> .c
> index ca099ed71d..ea944aa40c 100644
> ---
> a/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei
> .c
> +++ b/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdP
> +++ mrPei.c
> @@ -1,6 +1,6 @@
> /** @file
>
> - Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved.<BR>
> + Copyright (c) 2017 - 2019, Intel Corporation. All rights
> + reserved.<BR>
>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
> @@ -20,7 +20,7 @@
> #include <Ppi/VtdInfo.h>
> #include <Ppi/MemoryDiscovered.h>
> #include <Ppi/EndOfPeiPhase.h>
> -
> +#include <Guid/VtdPmrInfoHob.h>
> #include "IntelVTdPmrPei.h"
>
> EFI_GUID mVTdInfoGuid = {
> @@ -424,37 +424,79 @@ InitDmaProtection (
> UINTN MemoryAlignment;
> UINTN LowBottom;
> UINTN LowTop;
> - UINTN HighBottom;
> + UINT64 HighBottom;
> UINT64 HighTop;
> DMA_BUFFER_INFO *DmaBufferInfo;
> VOID *Hob;
> EFI_PEI_PPI_DESCRIPTOR *OldDescriptor;
> EDKII_IOMMU_PPI *OldIoMmuPpi;
> + VTD_PMR_INFO_HOB *VtdPmrHob;
> + VOID *VtdPmrHobPtr;
>
> + //
> + // Initialization
> + //
> + VtdPmrHob = NULL;
> Hob = GetFirstGuidHob (&mDmaBufferInfoGuid);
> DmaBufferInfo = GET_GUID_HOB_DATA(Hob);
> + VtdPmrHobPtr = GetFirstGuidHob (&gVtdPmrInfoDataHobGuid);
> +
> + /**
> + When gVtdPmrInfoDataHobGuid exists, it means:
> + 1. Dma buffer is reserved by memory initialize code
> + 2. PeiGetVtdPmrAlignmentLib is used to get alignment
> + 3. PMR regions are determined by the system memory map
> + 4. PMR regions will be conveyed through VTD_PMR_INFO_HOB
> +
> + When gVtdPmrInfoDataHobGuid dosen't exist, it means:
> + 1. IntelVTdPmr driver will calcuate the PMR memory alignment
> + 2. Dma buffer is reserved by AllocateAlignedPages() **/ if
> + (VtdPmrHobPtr == NULL) {
> + //
> + // Calcuate the PMR memory alignment
> + //
> + DEBUG ((DEBUG_INFO, "No special requirements for PMR memory\n"));
> + LowMemoryAlignment = GetLowMemoryAlignment (VTdInfo, VTdInfo-
> >EngineMask);
> + HighMemoryAlignment = GetHighMemoryAlignment (VTdInfo, VTdInfo-
> >EngineMask);
> + if (LowMemoryAlignment < HighMemoryAlignment) {
> + MemoryAlignment = (UINTN)HighMemoryAlignment;
> + } else {
> + MemoryAlignment = LowMemoryAlignment;
> + }
> + ASSERT (DmaBufferInfo->DmaBufferSize ==
> + ALIGN_VALUE(DmaBufferInfo->DmaBufferSize, MemoryAlignment));
>
> - DEBUG ((DEBUG_INFO, " DmaBufferSize : 0x%x\n", DmaBufferInfo-
> >DmaBufferSize));
> + //
> + // Allocate memory for DMA buffer
> + //
> + DmaBufferInfo->DmaBufferBase = (UINTN)AllocateAlignedPages
> (EFI_SIZE_TO_PAGES(DmaBufferInfo->DmaBufferSize), MemoryAlignment);
> + ASSERT (DmaBufferInfo->DmaBufferBase != 0);
> + if (DmaBufferInfo->DmaBufferBase == 0) {
> + DEBUG ((DEBUG_INFO, " InitDmaProtection : OutOfResource\n"));
> + return EFI_OUT_OF_RESOURCES;
> + }
>
> - LowMemoryAlignment = GetLowMemoryAlignment (VTdInfo, VTdInfo-
> >EngineMask);
> - HighMemoryAlignment = GetHighMemoryAlignment (VTdInfo, VTdInfo-
> >EngineMask);
> - if (LowMemoryAlignment < HighMemoryAlignment) {
> - MemoryAlignment = (UINTN)HighMemoryAlignment;
> + LowBottom = 0;
> + LowTop = DmaBufferInfo->DmaBufferBase;
> + HighBottom = DmaBufferInfo->DmaBufferBase + DmaBufferInfo-
> >DmaBufferSize;
> + HighTop = LShiftU64 (1, VTdInfo->HostAddressWidth + 1);
> } else {
> - MemoryAlignment = LowMemoryAlignment;
> - }
> - ASSERT (DmaBufferInfo->DmaBufferSize ==
> ALIGN_VALUE(DmaBufferInfo->DmaBufferSize, MemoryAlignment));
> - DmaBufferInfo->DmaBufferBase = (UINTN)AllocateAlignedPages
> (EFI_SIZE_TO_PAGES(DmaBufferInfo->DmaBufferSize), MemoryAlignment);
> - ASSERT (DmaBufferInfo->DmaBufferBase != 0);
> - if (DmaBufferInfo->DmaBufferBase == 0) {
> - DEBUG ((DEBUG_INFO, " InitDmaProtection : OutOfResource\n"));
> - return EFI_OUT_OF_RESOURCES;
> - }
>
> - DEBUG ((DEBUG_INFO, " DmaBufferBase : 0x%x\n", DmaBufferInfo-
> >DmaBufferBase));
> + //
> + // Get the PMR ranges information for the VTd PMR hob
> + //
> + VtdPmrHob = GET_GUID_HOB_DATA (VtdPmrHobPtr);
> + DmaBufferInfo->DmaBufferBase = VtdPmrHob->ProtectedLowLimit;
> + LowBottom = VtdPmrHob->ProtectedLowBase;
> + LowTop = VtdPmrHob->ProtectedLowLimit;
> + HighBottom = VtdPmrHob->ProtectedHighBase;
> + HighTop = VtdPmrHob->ProtectedHighLimit; }
>
> DmaBufferInfo->DmaBufferCurrentTop = DmaBufferInfo->DmaBufferBase
> + DmaBufferInfo->DmaBufferSize;
> DmaBufferInfo->DmaBufferCurrentBottom = DmaBufferInfo-
> >DmaBufferBase;
> + DEBUG ((DEBUG_INFO, " DmaBufferSize : 0x%x\n",
> + DmaBufferInfo->DmaBufferSize)); DEBUG ((DEBUG_INFO, "
> DmaBufferBase :
> + 0x%x\n", DmaBufferInfo->DmaBufferBase));
>
> //
> // (Re)Install PPI.
> @@ -472,10 +514,6 @@ InitDmaProtection (
> }
> ASSERT_EFI_ERROR (Status);
>
> - LowBottom = 0;
> - LowTop = DmaBufferInfo->DmaBufferBase;
> - HighBottom = DmaBufferInfo->DmaBufferBase + DmaBufferInfo-
> >DmaBufferSize;
> - HighTop = LShiftU64 (1, VTdInfo->HostAddressWidth + 1);
>
> Status = SetDmaProtectedRange (
> VTdInfo,
> @@ -559,7 +597,7 @@ InitVTdPmrForAll (
> VTD_INFO *VTdInfo;
> UINTN LowBottom;
> UINTN LowTop;
> - UINTN HighBottom;
> + UINT64 HighBottom;
> UINT64 HighTop;
>
> Hob = GetFirstGuidHob (&mVTdInfoGuid); diff --git
> a/Silicon/Intel/IntelSiliconPkg/Library/PeiGetVtdPmrAlignmentLib/PeiGetVt
> dPmrAlignmentLib.c
> b/Silicon/Intel/IntelSiliconPkg/Library/PeiGetVtdPmrAlignmentLib/PeiGetVt
> dPmrAlignmentLib.c
> new file mode 100644
> index 0000000000..8471cf85ac
> --- /dev/null
> +++ b/Silicon/Intel/IntelSiliconPkg/Library/PeiGetVtdPmrAlignmentLib/Pei
> +++ GetVtdPmrAlignmentLib.c
> @@ -0,0 +1,164 @@
> +/** @file
> + Library to get Global VTd PMR alignment information.
> + Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> +
> + SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +#include <PiPei.h>
> +#include <Library/BaseLib.h>
> +#include <Library/BaseMemoryLib.h>
> +#include <Library/IoLib.h>
> +#include <Library/DebugLib.h>
> +#include <Library/PeiGetVtdPmrAlignmentLib.h>
> +#include <Library/PeiServicesLib.h>
> +#include <IndustryStandard/DmaRemappingReportingTable.h>
> +#include <IndustryStandard/Vtd.h>
> +
> +typedef union {
> + struct {
> + UINT32 Low;
> + UINT32 High;
> + } Data32;
> + UINT64 Data;
> +} UINT64_STRUCT;
> +
> +/**
> + Get protected low memory alignment.
> +
> + @param HostAddressWidth The host address width.
> + @param VtdUnitBaseAddress The base address of the VTd engine.
> +
> + @return protected low memory alignment. Ex: 0x100000 **/
> +UINT32
> +GetGlobalVTdPlmrAlignment (
> + IN UINT8 HostAddressWidth,
> + IN UINTN VtdUnitBaseAddress
> + )
> +{
> + UINT32 Data32;
> +
> + MmioWrite32 (VtdUnitBaseAddress + R_PMEN_LOW_BASE_REG,
> 0xFFFFFFFF);
> + Data32 = MmioRead32 (VtdUnitBaseAddress + R_PMEN_LOW_BASE_REG);
> + Data32 = ~Data32 + 1;
> +
> + return Data32;
> +}
> +
> +/**
> + Get protected high memory alignment.
> +
> + @param HostAddressWidth The host address width.
> + @param VtdUnitBaseAddress The base address of the VTd engine.
> +
> + @return protected high memory alignment. Ex: 0x100000 **/
> +UINT64_STRUCT GetGlobalVTdPhmrAlignment (
> + IN UINT8 HostAddressWidth,
> + IN UINTN VtdUnitBaseAddress
> + )
> +{
> + UINT64_STRUCT Data64;
> +
> + MmioWrite64 (VtdUnitBaseAddress + R_PMEN_HIGH_BASE_REG,
> + 0xFFFFFFFFFFFFFFFF); Data64.Data = MmioRead64 (VtdUnitBaseAddress +
> + R_PMEN_HIGH_BASE_REG); Data64.Data = ~Data64.Data + 1; Data64.Data
> =
> + Data64.Data & (LShiftU64 (1, HostAddressWidth) - 1);
> +
> + return Data64;
> +}
> +
> +/**
> + Get Global VT-d Protected Memory alignment.
> + @return The maximum protected memory alignment. Ex: 0x100000 **/
> +UINTN EFIAPI GetGlobalVtdPmrAlignment (
> +)
> +{
> + UINT32 LowMemoryAlignment;
> + UINT64_STRUCT HighMemoryAlignment;
> + UINTN MemoryAlignment;
> + UINT32 GlobalVTdBaseAddress;
> + EFI_STATUS Status;
> + UINTN VtdIndex;
> + EFI_ACPI_DMAR_STRUCTURE_HEADER *DmarHeader;
> + EFI_ACPI_DMAR_DRHD_HEADER *DrhdHeader;
> + EFI_ACPI_DMAR_HEADER *AcpiDmarTable;
> +
> + //
> + // Initialization
> + //
> + GlobalVTdBaseAddress = 0xFFFFFFFF;
> + LowMemoryAlignment = 0;
> + HighMemoryAlignment.Data = 0;
> + MemoryAlignment = 0;
> + Status = EFI_UNSUPPORTED;
> + VtdIndex = 0;
> + DmarHeader = NULL;
> + DrhdHeader = NULL;
> + AcpiDmarTable = NULL;
> +
> + //
> + // Fatch the PEI DMAR ACPU Table that created and installed in
> + PlatformVTdInfoSamplePei.c // Status = PeiServicesLocatePpi (
> + &gEdkiiVTdInfoPpiGuid,
> + 0,
> + NULL,
> + (VOID **)&AcpiDmarTable
> + );
> + if (EFI_ERROR (Status)) {
> +
> + DEBUG ((DEBUG_ERROR, "PeiServicesLocatePpi gEdkiiVTdInfoPpiGuid
> failed\n"));
> + Status = EFI_NOT_FOUND;
> + MemoryAlignment = SIZE_1MB;
> +
> + } else {
> +
> + //
> + // Seatch the DRHD structure with INCLUDE_PCI_ALL flag Set -> Global
> VT-d
> + //
> + DmarHeader = (EFI_ACPI_DMAR_STRUCTURE_HEADER
> *)((UINTN)(AcpiDmarTable + 1));
> + while ((UINTN)DmarHeader < (UINTN)AcpiDmarTable + AcpiDmarTable-
> >Header.Length) {
> + switch (DmarHeader->Type) {
> + case EFI_ACPI_DMAR_TYPE_DRHD:
> + DrhdHeader = (EFI_ACPI_DMAR_DRHD_HEADER *) DmarHeader;
> + if ((DrhdHeader->Flags &
> EFI_ACPI_DMAR_DRHD_FLAGS_INCLUDE_PCI_ALL) ==
> EFI_ACPI_DMAR_DRHD_FLAGS_INCLUDE_PCI_ALL) {
> + GlobalVTdBaseAddress = (UINT32)DrhdHeader->RegisterBaseAddress;
> + DEBUG ((DEBUG_INFO," GlobalVTdBaseAddress: %x\n",
> GlobalVTdBaseAddress));
> + }
> + VtdIndex++;
> +
> + break;
> +
> + default:
> + break;
> + }
> + DmarHeader = (EFI_ACPI_DMAR_STRUCTURE_HEADER
> *)((UINTN)DmarHeader + DmarHeader->Length);
> + }
> +
> + if (GlobalVTdBaseAddress == 0xFFFFFFFF) {
> +
> + DEBUG ((DEBUG_ERROR, "Error! Please set INCLUDE_PCI_ALL flag to
> your Global VT-d\n"));
> + MemoryAlignment = SIZE_1MB;
> +
> + } else {
> + //
> + // Get the alignment information from VT-d register
> + //
> + LowMemoryAlignment = GetGlobalVTdPlmrAlignment (AcpiDmarTable-
> >HostAddressWidth, GlobalVTdBaseAddress);
> + HighMemoryAlignment = GetGlobalVTdPhmrAlignment (AcpiDmarTable-
> >HostAddressWidth, GlobalVTdBaseAddress);
> + if (LowMemoryAlignment < HighMemoryAlignment.Data) {
> + MemoryAlignment = (UINTN)HighMemoryAlignment.Data;
> + } else {
> + MemoryAlignment = LowMemoryAlignment;
> + }
> + }
> + }
> +
> + return MemoryAlignment;
> +}
> diff --git
> a/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei
> .inf
> b/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei
> .inf
> index 39b914cd00..3eb2b510ca 100644
> ---
> a/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdPmrPei
> .inf
> +++ b/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdPmrPei/IntelVTdP
> +++ mrPei.inf
> @@ -4,7 +4,7 @@
> # This driver initializes VTd engine based upon EDKII_VTD_INFO_PPI # and
> provide DMA protection in PEI.
> #
> -# Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved.<BR>
> +# Copyright (c) 2017 - 2019, Intel Corporation. All rights
> +reserved.<BR>
> # SPDX-License-Identifier: BSD-2-Clause-Patent # ## @@ -40,6 +40,9 @@
> IoLib
> CacheMaintenanceLib
>
> +[Guids]
> + gVtdPmrInfoDataHobGuid ## CONSUMES
> +
> [Ppis]
> gEdkiiIoMmuPpiGuid ## PRODUCES
> gEdkiiVTdInfoPpiGuid ## CONSUMES
> diff --git a/Silicon/Intel/IntelSiliconPkg/Include/Guid/VtdPmrInfoHob.h
> b/Silicon/Intel/IntelSiliconPkg/Include/Guid/VtdPmrInfoHob.h
> new file mode 100644
> index 0000000000..d08b9818e3
> --- /dev/null
> +++ b/Silicon/Intel/IntelSiliconPkg/Include/Guid/VtdPmrInfoHob.h
> @@ -0,0 +1,29 @@
> +/** @file
> + The definition for VTD PMR Regions Information Hob.
> +
> + Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> + SPDX-License-Identifier: BSD-2-Clause-Patent **/
> +
> +
> +#ifndef _VTD_PMR_INFO_HOB_H_
> +#define _VTD_PMR_INFO_HOB_H_
> +
> +///
> +/// This interface is to report the PMR regions information /// PMR
> +regions means PLMR/PHMR base and limit /// When
> gVtdPmrInfoDataHobGuid
> +exists, it means:
> +/// 1. Dma buffer is reserved by memory initialize code /// 2.
> +PeiGetVtdPmrAlignmentLib is used to get alignment /// 3. PMR regions
> +are determined by the system memory map /// 4. PMR regions will be
> +conveyed through VTD_PMR_INFO_HOB /// typedef struct {
> + UINT32 ProtectedLowBase; //PLMR Base
> + UINT32 ProtectedLowLimit; //PLMR Limit
> + UINT64 ProtectedHighBase; //PHMR Base
> + UINT64 ProtectedHighLimit; //PHMR Limit
> +} VTD_PMR_INFO_HOB;
> +
> +#endif // _VTD_PMR_INFO_HOB_H_
> +
> diff --git
> a/Silicon/Intel/IntelSiliconPkg/Include/Library/PeiGetVtdPmrAlignmentLib.h
> b/Silicon/Intel/IntelSiliconPkg/Include/Library/PeiGetVtdPmrAlignmentLib.h
> new file mode 100644
> index 0000000000..c6918d34d5
> --- /dev/null
> +++ b/Silicon/Intel/IntelSiliconPkg/Include/Library/PeiGetVtdPmrAlignmen
> +++ tLib.h
> @@ -0,0 +1,22 @@
> +/** @file
> + Get Global VTd PMR alignment information library.
> +
> + Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> + SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +#ifndef __GET_VTD_PMR_ALIGN_LIB_H__
> +#define __GET_VTD_PMR_ALIGN_LIB_H__
> +#include <Library/BaseLib.h>
> +
> +/**
> + Get Global VT-d Protected Memory alignment.
> + @return The maximum protected memory alignment.
> +**/
> +
> +UINTN
> +EFIAPI
> +GetGlobalVtdPmrAlignment (
> +);
> +
> +#endif // __GET_VTD_PMR_ALIGN_LIB_H__
> diff --git a/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec
> b/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec
> index fe5bfa0dc6..5e8082e113 100644
> --- a/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec
> +++ b/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec
> @@ -3,7 +3,7 @@
> #
> # This package provides common open source Intel silicon modules.
> #
> -# Copyright (c) 2016 - 2018, Intel Corporation. All rights reserved.<BR>
> +# Copyright (c) 2016 - 2019, Intel Corporation. All rights
> +reserved.<BR>
> # SPDX-License-Identifier: BSD-2-Clause-Patent # ## @@ -18,10 +18,14 @@
> Include
>
> [LibraryClasses.IA32, LibraryClasses.X64]
> - ## @libraryclass Provides services to access Microcode region on flash
> device.
> + ## @libraryclass Provides services to access Microcode region on flash
> device.
> #
> MicrocodeFlashAccessLib|Include/Library/MicrocodeFlashAccessLib.h
>
> + ## @libraryclass Provides services to access VTd PMR information #
> + PeiGetVtdPmrAlignmentLib|Include/Library/PeiGetVtdPmrAlignmentLib.h
> +
> [Guids]
> ## GUID for Package token space
> # {A9F8D54E-1107-4F0A-ADD0-4587E7A4A735}
> @@ -35,6 +39,9 @@
> ## Include/Guid/MicrocodeFmp.h
> gMicrocodeFmpImageTypeIdGuid = { 0x96d4fdcd, 0x1502, 0x424d, { 0x9d,
> 0x4c, 0x9b, 0x12, 0xd2, 0xdc, 0xae, 0x5c } }
>
> + ## HOB GUID to get memory information after MRC is done. The hob data
> + will be used to set the PMR ranges gVtdPmrInfoDataHobGuid =
> + {0x6fb61645, 0xf168, 0x46be, { 0x80, 0xec, 0xb5, 0x02, 0x38, 0x5e,
> + 0xe7, 0xe7 } }
> +
> [Ppis]
> gEdkiiVTdInfoPpiGuid = { 0x8a59fcb3, 0xf191, 0x400c, { 0x97, 0x67, 0x67,
> 0xaf, 0x2b, 0x25, 0x68, 0x4a } }
>
> diff --git a/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dsc
> b/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dsc
> index 58b5b656ef..352d1e2b6d 100644
> --- a/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dsc
> +++ b/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dsc
> @@ -1,7 +1,7 @@
> ## @file
> # This package provides common open source Intel silicon modules.
> #
> -# Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
> +# Copyright (c) 2017 - 2019, Intel Corporation. All rights
> +reserved.<BR>
> #
> # SPDX-License-Identifier: BSD-2-Clause-Patent
> #
> @@ -34,6 +34,7 @@
>
> SerialPortLib|MdePkg/Library/BaseSerialPortLibNull/BaseSerialPortLibNull.in
> f
>
> CacheMaintenanceLib|MdePkg/Library/BaseCacheMaintenanceLib/BaseCac
> heMaintenanceLib.inf
>
> MicrocodeFlashAccessLib|IntelSiliconPkg/Feature/Capsule/Library/Microcod
> eFlashAccessLibNull/MicrocodeFlashAccessLibNull.inf
> +
> +
> PeiGetVtdPmrAlignmentLib|IntelSiliconPkg/Library/PeiGetVtdPmrAlignment
> + Lib/PeiGetVtdPmrAlignmentLib.inf
>
> [LibraryClasses.common.PEIM]
> PeimEntryPoint|MdePkg/Library/PeimEntryPoint/PeimEntryPoint.inf
> diff --git
> a/Silicon/Intel/IntelSiliconPkg/Library/PeiGetVtdPmrAlignmentLib/PeiGetVt
> dPmrAlignmentLib.inf
> b/Silicon/Intel/IntelSiliconPkg/Library/PeiGetVtdPmrAlignmentLib/PeiGetVt
> dPmrAlignmentLib.inf
> new file mode 100644
> index 0000000000..ebb2cc2a7f
> --- /dev/null
> +++ b/Silicon/Intel/IntelSiliconPkg/Library/PeiGetVtdPmrAlignmentLib/Pei
> +++ GetVtdPmrAlignmentLib.inf
> @@ -0,0 +1,32 @@
> +## @file
> +# Component INF file for the GetVtdPmrAlignment library.
> +#
> +# Copyright (c) 2019, Intel Corporation. All rights reserved.<BR> # #
> +SPDX-License-Identifier: BSD-2-Clause-Patent # ##
> +
> +[Defines]
> +INF_VERSION = 0x00010017
> +BASE_NAME = PeiGetVtdPmrAlignmentLib
> +FILE_GUID = 0332BE93-0547-4D87-A7FA-0D9D76C53187
> +MODULE_TYPE = BASE
> +LIBRARY_CLASS = PeiGetVtdPmrAlignmentLib
> +
> +[Packages]
> +MdePkg/MdePkg.dec
> +IntelSiliconPkg/IntelSiliconPkg.dec
> +
> +[Sources]
> +PeiGetVtdPmrAlignmentLib.c
> +
> +[LibraryClasses]
> +DebugLib
> +BaseMemoryLib
> +MemoryAllocationLib
> +BaseLib
> +PeiServicesLib
> +
> +[Ppis]
> +gEdkiiVTdInfoPpiGuid ## CONSUMES
> --
> 2.16.2.windows.1
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