mirror of https://github.com/acidanthera/audk.git
897 lines
30 KiB
C
897 lines
30 KiB
C
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/** @file
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This driver implements TPM 2.0 definition block in ACPI table and
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populates registered SMI callback functions for Tcg2 physical presence
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and MemoryClear to handle the requests for ACPI method. It needs to be
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used together with Tcg2 MM drivers to exchange information on registered
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SwSmiValue and allocated NVS region address.
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Caution: This module requires additional review when modified.
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This driver will have external input - variable and ACPINvs data in SMM mode.
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This external input must be validated carefully to avoid security issue.
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Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
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Copyright (c) Microsoft Corporation.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiDxe.h>
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#include <IndustryStandard/Tpm2Acpi.h>
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#include <Guid/TpmInstance.h>
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#include <Guid/TpmNvsMm.h>
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#include <Guid/PiSmmCommunicationRegionTable.h>
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#include <Protocol/AcpiTable.h>
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#include <Protocol/Tcg2Protocol.h>
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#include <Protocol/MmCommunication.h>
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DxeServicesLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/DebugLib.h>
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#include <Library/PcdLib.h>
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#include <Library/PrintLib.h>
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#include <Library/TpmMeasurementLib.h>
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#include <Library/Tpm2DeviceLib.h>
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#include <Library/Tpm2CommandLib.h>
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#include <Library/UefiLib.h>
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//
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// Physical Presence Interface Version supported by Platform
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//
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#define PHYSICAL_PRESENCE_VERSION_TAG "$PV"
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#define PHYSICAL_PRESENCE_VERSION_SIZE 4
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//
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// PNP _HID for TPM2 device
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//
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#define TPM_HID_TAG "NNNN0000"
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#define TPM_HID_PNP_SIZE 8
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#define TPM_HID_ACPI_SIZE 9
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#define TPM_PRS_RESL "RESL"
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#define TPM_PRS_RESS "RESS"
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#define TPM_PRS_RES_NAME_SIZE 4
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//
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// Minimum PRS resource template size
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// 1 byte for BufferOp
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// 1 byte for PkgLength
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// 2 bytes for BufferSize
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// 12 bytes for Memory32Fixed descriptor
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// 5 bytes for Interrupt descriptor
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// 2 bytes for END Tag
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//
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#define TPM_POS_RES_TEMPLATE_MIN_SIZE (1 + 1 + 2 + 12 + 5 + 2)
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//
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// Max Interrupt buffer size for PRS interrupt resource
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// Now support 15 interrupts in maxmum
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//
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#define MAX_PRS_INT_BUF_SIZE (15*4)
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#pragma pack(1)
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typedef struct {
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EFI_ACPI_DESCRIPTION_HEADER Header;
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// Flags field is replaced in version 4 and above
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// BIT0~15: PlatformClass This field is only valid for version 4 and above
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// BIT16~31: Reserved
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UINT32 Flags;
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UINT64 AddressOfControlArea;
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UINT32 StartMethod;
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UINT8 PlatformSpecificParameters[12]; // size up to 12
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UINT32 Laml; // Optional
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UINT64 Lasa; // Optional
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} EFI_TPM2_ACPI_TABLE_V4;
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#pragma pack()
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EFI_TPM2_ACPI_TABLE_V4 mTpm2AcpiTemplate = {
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{
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EFI_ACPI_5_0_TRUSTED_COMPUTING_PLATFORM_2_TABLE_SIGNATURE,
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sizeof (mTpm2AcpiTemplate),
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EFI_TPM2_ACPI_TABLE_REVISION,
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//
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// Compiler initializes the remaining bytes to 0
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// These fields should be filled in in production
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//
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},
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0, // BIT0~15: PlatformClass
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// BIT16~31: Reserved
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0, // Control Area
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EFI_TPM2_ACPI_TABLE_START_METHOD_TIS, // StartMethod
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};
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TCG_NVS *mTcgNvs;
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/**
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Find the operation region in TCG ACPI table by given Name and Size,
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and initialize it if the region is found.
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@param[in, out] Table The TPM item in ACPI table.
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@param[in] Name The name string to find in TPM table.
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@param[in] Size The size of the region to find.
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@return The allocated address for the found region.
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**/
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VOID *
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AssignOpRegion (
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EFI_ACPI_DESCRIPTION_HEADER *Table,
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UINT32 Name,
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UINT16 Size
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)
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{
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EFI_STATUS Status;
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AML_OP_REGION_32_8 *OpRegion;
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EFI_PHYSICAL_ADDRESS MemoryAddress;
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MemoryAddress = SIZE_4GB - 1;
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//
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// Patch some pointers for the ASL code before loading the SSDT.
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//
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for (OpRegion = (AML_OP_REGION_32_8 *) (Table + 1);
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OpRegion <= (AML_OP_REGION_32_8 *) ((UINT8 *) Table + Table->Length);
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OpRegion = (AML_OP_REGION_32_8 *) ((UINT8 *) OpRegion + 1)) {
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if ((OpRegion->OpRegionOp == AML_EXT_REGION_OP) &&
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(OpRegion->NameString == Name) &&
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(OpRegion->DWordPrefix == AML_DWORD_PREFIX) &&
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(OpRegion->BytePrefix == AML_BYTE_PREFIX)) {
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Status = gBS->AllocatePages(AllocateMaxAddress, EfiACPIMemoryNVS, EFI_SIZE_TO_PAGES (Size), &MemoryAddress);
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ASSERT_EFI_ERROR (Status);
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ZeroMem ((VOID *)(UINTN)MemoryAddress, Size);
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OpRegion->RegionOffset = (UINT32) (UINTN) MemoryAddress;
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OpRegion->RegionLen = (UINT8) Size;
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break;
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}
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}
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return (VOID *) (UINTN) MemoryAddress;
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}
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/**
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Locate the MM communication buffer and protocol, then use it to exchange information with
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Tcg2StandaloneMmm on NVS address and SMI value.
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@param[in, out] TcgNvs The NVS subject to send to MM environment.
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@return The status for locating MM common buffer, communicate to MM, etc.
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**/
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EFI_STATUS
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EFIAPI
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ExchangeCommonBuffer (
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IN OUT TCG_NVS *TcgNvs
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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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EDKII_PI_SMM_COMMUNICATION_REGION_TABLE *PiSmmCommunicationRegionTable;
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EFI_MEMORY_DESCRIPTOR *MmCommMemRegion;
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EFI_MM_COMMUNICATE_HEADER *CommHeader;
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TPM_NVS_MM_COMM_BUFFER *CommBuffer;
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UINTN CommBufferSize;
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UINTN Index;
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// Step 0: Sanity check for input argument
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if (TcgNvs == NULL) {
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DEBUG ((DEBUG_ERROR, "%a - Input argument is NULL!\n", __FUNCTION__));
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return EFI_INVALID_PARAMETER;
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}
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// Step 1: Grab the common buffer header
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Status = EfiGetSystemConfigurationTable (&gEdkiiPiSmmCommunicationRegionTableGuid, (VOID**) &PiSmmCommunicationRegionTable);
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if (EFI_ERROR (Status)) {
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DEBUG ((DEBUG_ERROR, "%a - Failed to locate SMM communciation common buffer - %r!\n", __FUNCTION__, Status));
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return Status;
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}
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// Step 2: Grab one that is large enough to hold TPM_NVS_MM_COMM_BUFFER, the IPL one should be sufficient
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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 (TPM_NVS_MM_COMM_BUFFER) + OFFSET_OF (EFI_MM_COMMUNICATE_HEADER, Data))) {
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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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// Could not find one that meets our goal...
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DEBUG ((DEBUG_ERROR, "%a - Could not find a common buffer that is big enough for NVS!\n", __FUNCTION__));
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return EFI_OUT_OF_RESOURCES;
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}
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// Step 3: Start to populate contents
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// Step 3.1: MM Communication common header
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CommHeader = (EFI_MM_COMMUNICATE_HEADER *) (UINTN) MmCommMemRegion->PhysicalStart;
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CommBufferSize = sizeof (TPM_NVS_MM_COMM_BUFFER) + OFFSET_OF (EFI_MM_COMMUNICATE_HEADER, Data);
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ZeroMem (CommHeader, CommBufferSize);
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CopyGuid (&CommHeader->HeaderGuid, &gTpmNvsMmGuid);
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CommHeader->MessageLength = sizeof (TPM_NVS_MM_COMM_BUFFER);
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// Step 3.2: TPM_NVS_MM_COMM_BUFFER content per our needs
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CommBuffer = (TPM_NVS_MM_COMM_BUFFER *) (CommHeader->Data);
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CommBuffer->Function = TpmNvsMmExchangeInfo;
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CommBuffer->TargetAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) TcgNvs;
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// Step 4: Locate the protocol and signal Mmi.
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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() = %r\n", __FUNCTION__, Status));
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}
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else {
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DEBUG ((DEBUG_ERROR, "%a - Failed to locate MmCommunication protocol - %r\n", __FUNCTION__, Status));
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return Status;
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}
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// Step 5: If everything goes well, populate the channel number
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if (!EFI_ERROR (CommBuffer->ReturnStatus)) {
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// Need to demote to UINT8 according to SMI value definition
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TcgNvs->PhysicalPresence.SoftwareSmi = (UINT8) CommBuffer->RegisteredPpSwiValue;
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TcgNvs->MemoryClear.SoftwareSmi = (UINT8) CommBuffer->RegisteredMcSwiValue;
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DEBUG ((
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DEBUG_INFO,
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"%a Communication returned software SMI value. PP: 0x%x; MC: 0x%x.\n",
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__FUNCTION__,
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TcgNvs->PhysicalPresence.SoftwareSmi,
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TcgNvs->MemoryClear.SoftwareSmi
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));
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}
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return (EFI_STATUS) CommBuffer->ReturnStatus;
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}
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/**
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Patch version string of Physical Presence interface supported by platform. The initial string tag in TPM
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ACPI table is "$PV".
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@param[in, out] Table The TPM item in ACPI table.
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@param[in] PPVer Version string of Physical Presence interface supported by platform.
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@return The allocated address for the found region.
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**/
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EFI_STATUS
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UpdatePPVersion (
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EFI_ACPI_DESCRIPTION_HEADER *Table,
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CHAR8 *PPVer
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)
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{
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EFI_STATUS Status;
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UINT8 *DataPtr;
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//
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// Patch some pointers for the ASL code before loading the SSDT.
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//
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for (DataPtr = (UINT8 *)(Table + 1);
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DataPtr <= (UINT8 *) ((UINT8 *) Table + Table->Length - PHYSICAL_PRESENCE_VERSION_SIZE);
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DataPtr += 1) {
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if (AsciiStrCmp((CHAR8 *)DataPtr, PHYSICAL_PRESENCE_VERSION_TAG) == 0) {
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Status = AsciiStrCpyS((CHAR8 *)DataPtr, PHYSICAL_PRESENCE_VERSION_SIZE, PPVer);
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DEBUG((DEBUG_INFO, "TPM2 Physical Presence Interface Version update status 0x%x\n", Status));
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return Status;
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}
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}
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return EFI_NOT_FOUND;
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}
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/**
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Patch interrupt resources returned by TPM _PRS. ResourceTemplate to patch is determined by input
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interrupt buffer size. BufferSize, PkgLength and interrupt descriptor in ByteList need to be patched
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@param[in, out] Table The TPM item in ACPI table.
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@param[in] IrqBuffer Input new IRQ buffer.
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@param[in] IrqBuffserSize Input new IRQ buffer size.
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@param[out] IsShortFormPkgLength If _PRS returns Short length Package(ACPI spec 20.2.4).
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@return patch status.
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**/
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EFI_STATUS
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UpdatePossibleResource (
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IN OUT EFI_ACPI_DESCRIPTION_HEADER *Table,
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IN UINT32 *IrqBuffer,
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IN UINT32 IrqBuffserSize,
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OUT BOOLEAN *IsShortFormPkgLength
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)
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{
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UINT8 *DataPtr;
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UINT8 *DataEndPtr;
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UINT32 NewPkgLength;
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UINT32 OrignalPkgLength;
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NewPkgLength = 0;
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OrignalPkgLength = 0;
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DataEndPtr = NULL;
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//
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// Follow ACPI spec
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// 6.4.3 Extend Interrupt Descriptor.
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// 19.3.3 ASL Resource Template
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// 20 AML specification
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// to patch TPM ACPI object _PRS returned ResourceTemplate() containing 2 resource descriptors and an auto appended End Tag
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//
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// AML data is organized by following rule.
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// Code need to patch BufferSize and PkgLength and interrupt descriptor in ByteList
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//
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// ============= Buffer ====================
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// DefBuffer := BufferOp PkgLength BufferSize ByteList
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// BufferOp := 0x11
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//
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// ==============PkgLength==================
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// PkgLength := PkgLeadByte |
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// <PkgLeadByte ByteData> |
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// <PkgLeadByte ByteData ByteData> |
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// <PkgLeadByte ByteData ByteData ByteData>
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//
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// PkgLeadByte := <bit 7-6: ByteData count that follows (0-3)>
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// <bit 5-4: Only used if PkgLength <= 63 >
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// <bit 3-0: Least significant package length nybble>
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//
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//==============BufferSize==================
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// BufferSize := Integer
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// Integer := ByteConst|WordConst|DwordConst....
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//
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// ByteConst := BytePrefix ByteData
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//
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//==============ByteList===================
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// ByteList := ByteData ByteList
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//
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//=========================================
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//
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// 1. Check TPM_PRS_RESS with PkgLength <=63 can hold the input interrupt number buffer for patching
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//
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|
|
for (DataPtr = (UINT8 *)(Table + 1);
|
||
|
|
DataPtr < (UINT8 *) ((UINT8 *) Table + Table->Length - (TPM_PRS_RES_NAME_SIZE + TPM_POS_RES_TEMPLATE_MIN_SIZE));
|
||
|
|
DataPtr += 1) {
|
||
|
|
if (CompareMem(DataPtr, TPM_PRS_RESS, TPM_PRS_RES_NAME_SIZE) == 0) {
|
||
|
|
//
|
||
|
|
// Jump over object name & BufferOp
|
||
|
|
//
|
||
|
|
DataPtr += TPM_PRS_RES_NAME_SIZE + 1;
|
||
|
|
|
||
|
|
if ((*DataPtr & (BIT7|BIT6)) == 0) {
|
||
|
|
OrignalPkgLength = (UINT32)*DataPtr;
|
||
|
|
DataEndPtr = DataPtr + OrignalPkgLength;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Jump over PkgLength = PkgLeadByte only
|
||
|
|
//
|
||
|
|
NewPkgLength++;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Jump over BufferSize
|
||
|
|
//
|
||
|
|
if (*(DataPtr + 1) == AML_BYTE_PREFIX) {
|
||
|
|
NewPkgLength += 2;
|
||
|
|
} else if (*(DataPtr + 1) == AML_WORD_PREFIX) {
|
||
|
|
NewPkgLength += 3;
|
||
|
|
} else if (*(DataPtr + 1) == AML_DWORD_PREFIX) {
|
||
|
|
NewPkgLength += 5;
|
||
|
|
} else {
|
||
|
|
ASSERT(FALSE);
|
||
|
|
return EFI_UNSUPPORTED;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
ASSERT(FALSE);
|
||
|
|
return EFI_UNSUPPORTED;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Include Memory32Fixed Descriptor (12 Bytes) + Interrupt Descriptor header(5 Bytes) + End Tag(2 Bytes)
|
||
|
|
//
|
||
|
|
NewPkgLength += 19 + IrqBuffserSize;
|
||
|
|
if (NewPkgLength > 63) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (NewPkgLength > OrignalPkgLength) {
|
||
|
|
ASSERT(FALSE);
|
||
|
|
return EFI_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// 1.1 Patch PkgLength
|
||
|
|
//
|
||
|
|
*DataPtr = (UINT8)NewPkgLength;
|
||
|
|
|
||
|
|
//
|
||
|
|
// 1.2 Patch BufferSize = sizeof(Memory32Fixed Descriptor + Interrupt Descriptor + End Tag).
|
||
|
|
// It is Little endian. So only patch lowest byte of BufferSize due to current interrupt number limit.
|
||
|
|
//
|
||
|
|
*(DataPtr + 2) = (UINT8)(IrqBuffserSize + 19);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Notify _PRS to report short formed ResourceTemplate
|
||
|
|
//
|
||
|
|
*IsShortFormPkgLength = TRUE;
|
||
|
|
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// 2. Use TPM_PRS_RESL with PkgLength > 63 to hold longer input interrupt number buffer for patching
|
||
|
|
//
|
||
|
|
if (NewPkgLength > 63) {
|
||
|
|
NewPkgLength = 0;
|
||
|
|
OrignalPkgLength = 0;
|
||
|
|
for (DataPtr = (UINT8 *)(Table + 1);
|
||
|
|
DataPtr < (UINT8 *) ((UINT8 *) Table + Table->Length - (TPM_PRS_RES_NAME_SIZE + TPM_POS_RES_TEMPLATE_MIN_SIZE));
|
||
|
|
DataPtr += 1) {
|
||
|
|
if (CompareMem(DataPtr, TPM_PRS_RESL, TPM_PRS_RES_NAME_SIZE) == 0) {
|
||
|
|
//
|
||
|
|
// Jump over object name & BufferOp
|
||
|
|
//
|
||
|
|
DataPtr += TPM_PRS_RES_NAME_SIZE + 1;
|
||
|
|
|
||
|
|
if ((*DataPtr & (BIT7|BIT6)) != 0) {
|
||
|
|
OrignalPkgLength = (UINT32)(*(DataPtr + 1) << 4) + (*DataPtr & 0x0F);
|
||
|
|
DataEndPtr = DataPtr + OrignalPkgLength;
|
||
|
|
//
|
||
|
|
// Jump over PkgLength = PkgLeadByte + ByteData length
|
||
|
|
//
|
||
|
|
NewPkgLength += 1 + ((*DataPtr & (BIT7|BIT6)) >> 6);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Jump over BufferSize
|
||
|
|
//
|
||
|
|
if (*(DataPtr + NewPkgLength) == AML_BYTE_PREFIX) {
|
||
|
|
NewPkgLength += 2;
|
||
|
|
} else if (*(DataPtr + NewPkgLength) == AML_WORD_PREFIX) {
|
||
|
|
NewPkgLength += 3;
|
||
|
|
} else if (*(DataPtr + NewPkgLength) == AML_DWORD_PREFIX) {
|
||
|
|
NewPkgLength += 5;
|
||
|
|
} else {
|
||
|
|
ASSERT(FALSE);
|
||
|
|
return EFI_UNSUPPORTED;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
ASSERT(FALSE);
|
||
|
|
return EFI_UNSUPPORTED;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Include Memory32Fixed Descriptor (12 Bytes) + Interrupt Descriptor header(5 Bytes) + End Tag(2 Bytes)
|
||
|
|
//
|
||
|
|
NewPkgLength += 19 + IrqBuffserSize;
|
||
|
|
|
||
|
|
if (NewPkgLength > OrignalPkgLength) {
|
||
|
|
ASSERT(FALSE);
|
||
|
|
return EFI_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// 2.1 Patch PkgLength. Only patch PkgLeadByte and first ByteData
|
||
|
|
//
|
||
|
|
*DataPtr = (UINT8)((*DataPtr) & 0xF0) | (NewPkgLength & 0x0F);
|
||
|
|
*(DataPtr + 1) = (UINT8)((NewPkgLength & 0xFF0) >> 4);
|
||
|
|
|
||
|
|
//
|
||
|
|
// 2.2 Patch BufferSize = sizeof(Memory32Fixed Descriptor + Interrupt Descriptor + End Tag).
|
||
|
|
// It is Little endian. Only patch lowest byte of BufferSize due to current interrupt number limit.
|
||
|
|
//
|
||
|
|
*(DataPtr + 2 + ((*DataPtr & (BIT7|BIT6)) >> 6)) = (UINT8)(IrqBuffserSize + 19);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Notify _PRS to report long formed ResourceTemplate
|
||
|
|
//
|
||
|
|
*IsShortFormPkgLength = FALSE;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (DataPtr >= (UINT8 *) ((UINT8 *) Table + Table->Length - (TPM_PRS_RES_NAME_SIZE + TPM_POS_RES_TEMPLATE_MIN_SIZE))) {
|
||
|
|
return EFI_NOT_FOUND;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// 3. Move DataPtr to Interrupt descriptor header and patch interrupt descriptor.
|
||
|
|
// 5 bytes for interrupt descriptor header, 2 bytes for End Tag
|
||
|
|
//
|
||
|
|
DataPtr += NewPkgLength - (5 + IrqBuffserSize + 2);
|
||
|
|
//
|
||
|
|
// 3.1 Patch Length bit[7:0] of Interrupt descriptor patch interrupt descriptor
|
||
|
|
//
|
||
|
|
*(DataPtr + 1) = (UINT8)(2 + IrqBuffserSize);
|
||
|
|
//
|
||
|
|
// 3.2 Patch Interrupt Table Length
|
||
|
|
//
|
||
|
|
*(DataPtr + 4) = (UINT8)(IrqBuffserSize / sizeof(UINT32));
|
||
|
|
//
|
||
|
|
// 3.3 Copy patched InterruptNumBuffer
|
||
|
|
//
|
||
|
|
CopyMem(DataPtr + 5, IrqBuffer, IrqBuffserSize);
|
||
|
|
|
||
|
|
//
|
||
|
|
// 4. Jump over Interrupt descriptor and Patch END Tag, set Checksum field to 0
|
||
|
|
//
|
||
|
|
DataPtr += 5 + IrqBuffserSize;
|
||
|
|
*DataPtr = ACPI_END_TAG_DESCRIPTOR;
|
||
|
|
*(DataPtr + 1) = 0;
|
||
|
|
|
||
|
|
//
|
||
|
|
// 5. Jump over new ResourceTemplate. Stuff rest bytes to NOOP
|
||
|
|
//
|
||
|
|
DataPtr += 2;
|
||
|
|
if (DataPtr < DataEndPtr) {
|
||
|
|
SetMem(DataPtr, (UINTN)DataEndPtr - (UINTN)DataPtr, AML_NOOP_OP);
|
||
|
|
}
|
||
|
|
|
||
|
|
return EFI_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
Patch TPM2 device HID string. The initial string tag in TPM2 ACPI table is "NNN0000".
|
||
|
|
|
||
|
|
@param[in, out] Table The TPM2 SSDT ACPI table.
|
||
|
|
|
||
|
|
@return HID Update status.
|
||
|
|
|
||
|
|
**/
|
||
|
|
EFI_STATUS
|
||
|
|
UpdateHID (
|
||
|
|
EFI_ACPI_DESCRIPTION_HEADER *Table
|
||
|
|
)
|
||
|
|
{
|
||
|
|
EFI_STATUS Status;
|
||
|
|
UINT8 *DataPtr;
|
||
|
|
CHAR8 Hid[TPM_HID_ACPI_SIZE];
|
||
|
|
UINT32 ManufacturerID;
|
||
|
|
UINT32 FirmwareVersion1;
|
||
|
|
UINT32 FirmwareVersion2;
|
||
|
|
BOOLEAN PnpHID;
|
||
|
|
|
||
|
|
PnpHID = TRUE;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Initialize HID with Default PNP string
|
||
|
|
//
|
||
|
|
ZeroMem(Hid, TPM_HID_ACPI_SIZE);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Get Manufacturer ID
|
||
|
|
//
|
||
|
|
Status = Tpm2GetCapabilityManufactureID(&ManufacturerID);
|
||
|
|
if (!EFI_ERROR(Status)) {
|
||
|
|
DEBUG((DEBUG_INFO, "TPM_PT_MANUFACTURER 0x%08x\n", ManufacturerID));
|
||
|
|
//
|
||
|
|
// ManufacturerID defined in TCG Vendor ID Registry
|
||
|
|
// may tailed with 0x00 or 0x20
|
||
|
|
//
|
||
|
|
if ((ManufacturerID >> 24) == 0x00 || ((ManufacturerID >> 24) == 0x20)) {
|
||
|
|
//
|
||
|
|
// HID containing PNP ID "NNN####"
|
||
|
|
// NNN is uppercase letter for Vendor ID specified by manufacturer
|
||
|
|
//
|
||
|
|
CopyMem(Hid, &ManufacturerID, 3);
|
||
|
|
} else {
|
||
|
|
//
|
||
|
|
// HID containing ACP ID "NNNN####"
|
||
|
|
// NNNN is uppercase letter for Vendor ID specified by manufacturer
|
||
|
|
//
|
||
|
|
CopyMem(Hid, &ManufacturerID, 4);
|
||
|
|
PnpHID = FALSE;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
DEBUG ((DEBUG_ERROR, "Get TPM_PT_MANUFACTURER failed %x!\n", Status));
|
||
|
|
ASSERT(FALSE);
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
Status = Tpm2GetCapabilityFirmwareVersion(&FirmwareVersion1, &FirmwareVersion2);
|
||
|
|
if (!EFI_ERROR(Status)) {
|
||
|
|
DEBUG((DEBUG_INFO, "TPM_PT_FIRMWARE_VERSION_1 0x%x\n", FirmwareVersion1));
|
||
|
|
DEBUG((DEBUG_INFO, "TPM_PT_FIRMWARE_VERSION_2 0x%x\n", FirmwareVersion2));
|
||
|
|
//
|
||
|
|
// #### is Firmware Version 1
|
||
|
|
//
|
||
|
|
if (PnpHID) {
|
||
|
|
AsciiSPrint(Hid + 3, TPM_HID_PNP_SIZE - 3, "%02d%02d", ((FirmwareVersion1 & 0xFFFF0000) >> 16), (FirmwareVersion1 & 0x0000FFFF));
|
||
|
|
} else {
|
||
|
|
AsciiSPrint(Hid + 4, TPM_HID_ACPI_SIZE - 4, "%02d%02d", ((FirmwareVersion1 & 0xFFFF0000) >> 16), (FirmwareVersion1 & 0x0000FFFF));
|
||
|
|
}
|
||
|
|
|
||
|
|
} else {
|
||
|
|
DEBUG ((DEBUG_ERROR, "Get TPM_PT_FIRMWARE_VERSION_X failed %x!\n", Status));
|
||
|
|
ASSERT(FALSE);
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Patch HID in ASL code before loading the SSDT.
|
||
|
|
//
|
||
|
|
for (DataPtr = (UINT8 *)(Table + 1);
|
||
|
|
DataPtr <= (UINT8 *) ((UINT8 *) Table + Table->Length - TPM_HID_PNP_SIZE);
|
||
|
|
DataPtr += 1) {
|
||
|
|
if (AsciiStrCmp((CHAR8 *)DataPtr, TPM_HID_TAG) == 0) {
|
||
|
|
if (PnpHID) {
|
||
|
|
CopyMem(DataPtr, Hid, TPM_HID_PNP_SIZE);
|
||
|
|
//
|
||
|
|
// if HID is PNP ID, patch the last byte in HID TAG to Noop
|
||
|
|
//
|
||
|
|
*(DataPtr + TPM_HID_PNP_SIZE) = AML_NOOP_OP;
|
||
|
|
} else {
|
||
|
|
|
||
|
|
CopyMem(DataPtr, Hid, TPM_HID_ACPI_SIZE);
|
||
|
|
}
|
||
|
|
DEBUG((DEBUG_INFO, "TPM2 ACPI _HID is patched to %a\n", DataPtr));
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
DEBUG((DEBUG_ERROR, "TPM2 ACPI HID TAG for patch not found!\n"));
|
||
|
|
return EFI_NOT_FOUND;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
Initialize and publish TPM items in ACPI table.
|
||
|
|
|
||
|
|
@retval EFI_SUCCESS The TCG ACPI table is published successfully.
|
||
|
|
@retval Others The TCG ACPI table is not published.
|
||
|
|
|
||
|
|
**/
|
||
|
|
EFI_STATUS
|
||
|
|
PublishAcpiTable (
|
||
|
|
VOID
|
||
|
|
)
|
||
|
|
{
|
||
|
|
EFI_STATUS Status;
|
||
|
|
EFI_ACPI_TABLE_PROTOCOL *AcpiTable;
|
||
|
|
UINTN TableKey;
|
||
|
|
EFI_ACPI_DESCRIPTION_HEADER *Table;
|
||
|
|
UINTN TableSize;
|
||
|
|
UINT32 *PossibleIrqNumBuf;
|
||
|
|
UINT32 PossibleIrqNumBufSize;
|
||
|
|
BOOLEAN IsShortFormPkgLength;
|
||
|
|
|
||
|
|
IsShortFormPkgLength = FALSE;
|
||
|
|
|
||
|
|
Status = GetSectionFromFv (
|
||
|
|
&gEfiCallerIdGuid,
|
||
|
|
EFI_SECTION_RAW,
|
||
|
|
0,
|
||
|
|
(VOID **) &Table,
|
||
|
|
&TableSize
|
||
|
|
);
|
||
|
|
ASSERT_EFI_ERROR (Status);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Measure to PCR[0] with event EV_POST_CODE ACPI DATA.
|
||
|
|
// The measurement has to be done before any update.
|
||
|
|
// Otherwise, the PCR record would be different after TPM FW update
|
||
|
|
// or the PCD configuration change.
|
||
|
|
//
|
||
|
|
TpmMeasureAndLogData(
|
||
|
|
0,
|
||
|
|
EV_POST_CODE,
|
||
|
|
EV_POSTCODE_INFO_ACPI_DATA,
|
||
|
|
ACPI_DATA_LEN,
|
||
|
|
Table,
|
||
|
|
TableSize
|
||
|
|
);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Update Table version before measuring it to PCR
|
||
|
|
//
|
||
|
|
Status = UpdatePPVersion(Table, (CHAR8 *)PcdGetPtr(PcdTcgPhysicalPresenceInterfaceVer));
|
||
|
|
ASSERT_EFI_ERROR (Status);
|
||
|
|
|
||
|
|
DEBUG ((
|
||
|
|
DEBUG_INFO,
|
||
|
|
"Current physical presence interface version - %a\n",
|
||
|
|
(CHAR8 *) PcdGetPtr(PcdTcgPhysicalPresenceInterfaceVer)
|
||
|
|
));
|
||
|
|
|
||
|
|
//
|
||
|
|
// Update TPM2 HID after measuring it to PCR
|
||
|
|
//
|
||
|
|
Status = UpdateHID(Table);
|
||
|
|
if (EFI_ERROR(Status)) {
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (PcdGet32(PcdTpm2CurrentIrqNum) != 0) {
|
||
|
|
//
|
||
|
|
// Patch _PRS interrupt resource only when TPM interrupt is supported
|
||
|
|
//
|
||
|
|
PossibleIrqNumBuf = (UINT32 *)PcdGetPtr(PcdTpm2PossibleIrqNumBuf);
|
||
|
|
PossibleIrqNumBufSize = (UINT32)PcdGetSize(PcdTpm2PossibleIrqNumBuf);
|
||
|
|
|
||
|
|
if (PossibleIrqNumBufSize <= MAX_PRS_INT_BUF_SIZE && (PossibleIrqNumBufSize % sizeof(UINT32)) == 0) {
|
||
|
|
Status = UpdatePossibleResource(Table, PossibleIrqNumBuf, PossibleIrqNumBufSize, &IsShortFormPkgLength);
|
||
|
|
DEBUG ((
|
||
|
|
DEBUG_INFO,
|
||
|
|
"UpdatePossibleResource status - %x. TPM2 service may not ready in OS.\n",
|
||
|
|
Status
|
||
|
|
));
|
||
|
|
} else {
|
||
|
|
DEBUG ((
|
||
|
|
DEBUG_INFO,
|
||
|
|
"PcdTpm2PossibleIrqNumBuf size %x is not correct. TPM2 service may not ready in OS.\n",
|
||
|
|
PossibleIrqNumBufSize
|
||
|
|
));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ASSERT (Table->OemTableId == SIGNATURE_64 ('T', 'p', 'm', '2', 'T', 'a', 'b', 'l'));
|
||
|
|
CopyMem (Table->OemId, PcdGetPtr (PcdAcpiDefaultOemId), sizeof (Table->OemId) );
|
||
|
|
mTcgNvs = AssignOpRegion (Table, SIGNATURE_32 ('T', 'N', 'V', 'S'), (UINT16) sizeof (TCG_NVS));
|
||
|
|
ASSERT (mTcgNvs != NULL);
|
||
|
|
mTcgNvs->TpmIrqNum = PcdGet32(PcdTpm2CurrentIrqNum);
|
||
|
|
mTcgNvs->IsShortFormPkgLength = IsShortFormPkgLength;
|
||
|
|
|
||
|
|
Status = ExchangeCommonBuffer (mTcgNvs);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Publish the TPM ACPI table. Table is re-checksummed.
|
||
|
|
//
|
||
|
|
Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID **) &AcpiTable);
|
||
|
|
ASSERT_EFI_ERROR (Status);
|
||
|
|
|
||
|
|
TableKey = 0;
|
||
|
|
Status = AcpiTable->InstallAcpiTable (
|
||
|
|
AcpiTable,
|
||
|
|
Table,
|
||
|
|
TableSize,
|
||
|
|
&TableKey
|
||
|
|
);
|
||
|
|
ASSERT_EFI_ERROR (Status);
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
Publish TPM2 ACPI table
|
||
|
|
|
||
|
|
@retval EFI_SUCCESS The TPM2 ACPI table is published successfully.
|
||
|
|
@retval Others The TPM2 ACPI table is not published.
|
||
|
|
|
||
|
|
**/
|
||
|
|
EFI_STATUS
|
||
|
|
PublishTpm2 (
|
||
|
|
VOID
|
||
|
|
)
|
||
|
|
{
|
||
|
|
EFI_STATUS Status;
|
||
|
|
EFI_ACPI_TABLE_PROTOCOL *AcpiTable;
|
||
|
|
UINTN TableKey;
|
||
|
|
UINT64 OemTableId;
|
||
|
|
EFI_TPM2_ACPI_CONTROL_AREA *ControlArea;
|
||
|
|
TPM2_PTP_INTERFACE_TYPE InterfaceType;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Measure to PCR[0] with event EV_POST_CODE ACPI DATA.
|
||
|
|
// The measurement has to be done before any update.
|
||
|
|
// Otherwise, the PCR record would be different after event log update
|
||
|
|
// or the PCD configuration change.
|
||
|
|
//
|
||
|
|
TpmMeasureAndLogData(
|
||
|
|
0,
|
||
|
|
EV_POST_CODE,
|
||
|
|
EV_POSTCODE_INFO_ACPI_DATA,
|
||
|
|
ACPI_DATA_LEN,
|
||
|
|
&mTpm2AcpiTemplate,
|
||
|
|
mTpm2AcpiTemplate.Header.Length
|
||
|
|
);
|
||
|
|
|
||
|
|
mTpm2AcpiTemplate.Header.Revision = PcdGet8(PcdTpm2AcpiTableRev);
|
||
|
|
DEBUG((DEBUG_INFO, "Tpm2 ACPI table revision is %d\n", mTpm2AcpiTemplate.Header.Revision));
|
||
|
|
|
||
|
|
//
|
||
|
|
// PlatformClass is only valid for version 4 and above
|
||
|
|
// BIT0~15: PlatformClass
|
||
|
|
// BIT16~31: Reserved
|
||
|
|
//
|
||
|
|
if (mTpm2AcpiTemplate.Header.Revision >= EFI_TPM2_ACPI_TABLE_REVISION_4) {
|
||
|
|
mTpm2AcpiTemplate.Flags = (mTpm2AcpiTemplate.Flags & 0xFFFF0000) | PcdGet8(PcdTpmPlatformClass);
|
||
|
|
DEBUG((DEBUG_INFO, "Tpm2 ACPI table PlatformClass is %d\n", (mTpm2AcpiTemplate.Flags & 0x0000FFFF)));
|
||
|
|
}
|
||
|
|
|
||
|
|
mTpm2AcpiTemplate.Laml = PcdGet32(PcdTpm2AcpiTableLaml);
|
||
|
|
mTpm2AcpiTemplate.Lasa = PcdGet64(PcdTpm2AcpiTableLasa);
|
||
|
|
if ((mTpm2AcpiTemplate.Header.Revision < EFI_TPM2_ACPI_TABLE_REVISION_4) ||
|
||
|
|
(mTpm2AcpiTemplate.Laml == 0) || (mTpm2AcpiTemplate.Lasa == 0)) {
|
||
|
|
//
|
||
|
|
// If version is smaller than 4 or Laml/Lasa is not valid, rollback to original Length.
|
||
|
|
//
|
||
|
|
mTpm2AcpiTemplate.Header.Length = sizeof(EFI_TPM2_ACPI_TABLE);
|
||
|
|
}
|
||
|
|
|
||
|
|
InterfaceType = PcdGet8(PcdActiveTpmInterfaceType);
|
||
|
|
switch (InterfaceType) {
|
||
|
|
case Tpm2PtpInterfaceCrb:
|
||
|
|
mTpm2AcpiTemplate.StartMethod = EFI_TPM2_ACPI_TABLE_START_METHOD_COMMAND_RESPONSE_BUFFER_INTERFACE;
|
||
|
|
mTpm2AcpiTemplate.AddressOfControlArea = PcdGet64 (PcdTpmBaseAddress) + 0x40;
|
||
|
|
ControlArea = (EFI_TPM2_ACPI_CONTROL_AREA *)(UINTN)mTpm2AcpiTemplate.AddressOfControlArea;
|
||
|
|
ControlArea->CommandSize = 0xF80;
|
||
|
|
ControlArea->ResponseSize = 0xF80;
|
||
|
|
ControlArea->Command = PcdGet64 (PcdTpmBaseAddress) + 0x80;
|
||
|
|
ControlArea->Response = PcdGet64 (PcdTpmBaseAddress) + 0x80;
|
||
|
|
break;
|
||
|
|
case Tpm2PtpInterfaceFifo:
|
||
|
|
case Tpm2PtpInterfaceTis:
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
DEBUG((DEBUG_ERROR, "TPM2 InterfaceType get error! %d\n", InterfaceType));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
CopyMem (mTpm2AcpiTemplate.Header.OemId, PcdGetPtr (PcdAcpiDefaultOemId), sizeof (mTpm2AcpiTemplate.Header.OemId));
|
||
|
|
OemTableId = PcdGet64 (PcdAcpiDefaultOemTableId);
|
||
|
|
CopyMem (&mTpm2AcpiTemplate.Header.OemTableId, &OemTableId, sizeof (UINT64));
|
||
|
|
mTpm2AcpiTemplate.Header.OemRevision = PcdGet32 (PcdAcpiDefaultOemRevision);
|
||
|
|
mTpm2AcpiTemplate.Header.CreatorId = PcdGet32 (PcdAcpiDefaultCreatorId);
|
||
|
|
mTpm2AcpiTemplate.Header.CreatorRevision = PcdGet32 (PcdAcpiDefaultCreatorRevision);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Construct ACPI table
|
||
|
|
//
|
||
|
|
Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID **) &AcpiTable);
|
||
|
|
ASSERT_EFI_ERROR (Status);
|
||
|
|
|
||
|
|
Status = AcpiTable->InstallAcpiTable (
|
||
|
|
AcpiTable,
|
||
|
|
&mTpm2AcpiTemplate,
|
||
|
|
mTpm2AcpiTemplate.Header.Length,
|
||
|
|
&TableKey
|
||
|
|
);
|
||
|
|
ASSERT_EFI_ERROR (Status);
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
The driver's entry point.
|
||
|
|
|
||
|
|
It patches and installs ACPI tables used for handling TPM physical presence
|
||
|
|
and Memory Clear requests through ACPI method.
|
||
|
|
|
||
|
|
@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 Others Some error occurs when executing this entry point.
|
||
|
|
|
||
|
|
**/
|
||
|
|
EFI_STATUS
|
||
|
|
EFIAPI
|
||
|
|
InitializeTcgAcpi (
|
||
|
|
IN EFI_HANDLE ImageHandle,
|
||
|
|
IN EFI_SYSTEM_TABLE *SystemTable
|
||
|
|
)
|
||
|
|
{
|
||
|
|
EFI_STATUS Status;
|
||
|
|
|
||
|
|
if (!CompareGuid (PcdGetPtr(PcdTpmInstanceGuid), &gEfiTpmDeviceInstanceTpm20DtpmGuid)){
|
||
|
|
DEBUG ((DEBUG_ERROR, "No TPM2 DTPM instance required!\n"));
|
||
|
|
return EFI_UNSUPPORTED;
|
||
|
|
}
|
||
|
|
|
||
|
|
Status = PublishAcpiTable ();
|
||
|
|
ASSERT_EFI_ERROR (Status);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Set TPM2 ACPI table
|
||
|
|
//
|
||
|
|
Status = PublishTpm2 ();
|
||
|
|
ASSERT_EFI_ERROR (Status);
|
||
|
|
|
||
|
|
return EFI_SUCCESS;
|
||
|
|
}
|
||
|
|
|