diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.c')
| -rw-r--r-- | src/VBox/Devices/EFI/Firmware/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.c | 902 |
1 files changed, 902 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.c b/src/VBox/Devices/EFI/Firmware/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.c new file mode 100644 index 00000000..a0964aef --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.c @@ -0,0 +1,902 @@ +/** @file + This driver implements TPM 2.0 definition block in ACPI table and + populates registered SMI callback functions for Tcg2 physical presence + and MemoryClear to handle the requests for ACPI method. It needs to be + used together with Tcg2 MM drivers to exchange information on registered + SwSmiValue and allocated NVS region address. + + Caution: This module requires additional review when modified. + This driver will have external input - variable and ACPINvs data in SMM mode. + This external input must be validated carefully to avoid security issue. + +Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR> +Copyright (c) Microsoft Corporation. +SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include <PiDxe.h> + +#include <IndustryStandard/Tpm2Acpi.h> + +#include <Guid/TpmInstance.h> +#include <Guid/TpmNvsMm.h> +#include <Guid/PiSmmCommunicationRegionTable.h> + +#include <Protocol/AcpiTable.h> +#include <Protocol/Tcg2Protocol.h> +#include <Protocol/MmCommunication.h> + +#include <Library/BaseLib.h> +#include <Library/BaseMemoryLib.h> +#include <Library/DxeServicesLib.h> +#include <Library/UefiBootServicesTableLib.h> +#include <Library/DebugLib.h> +#include <Library/PcdLib.h> +#include <Library/PrintLib.h> +#include <Library/TpmMeasurementLib.h> +#include <Library/Tpm2DeviceLib.h> +#include <Library/Tpm2CommandLib.h> +#include <Library/UefiLib.h> +#include <Library/MmUnblockMemoryLib.h> + +// +// Physical Presence Interface Version supported by Platform +// +#define PHYSICAL_PRESENCE_VERSION_TAG "$PV" +#define PHYSICAL_PRESENCE_VERSION_SIZE 4 + +// +// PNP _HID for TPM2 device +// +#define TPM_HID_TAG "NNNN0000" +#define TPM_HID_PNP_SIZE 8 +#define TPM_HID_ACPI_SIZE 9 + +#define TPM_PRS_RESL "RESL" +#define TPM_PRS_RESS "RESS" +#define TPM_PRS_RES_NAME_SIZE 4 +// +// Minimum PRS resource template size +// 1 byte for BufferOp +// 1 byte for PkgLength +// 2 bytes for BufferSize +// 12 bytes for Memory32Fixed descriptor +// 5 bytes for Interrupt descriptor +// 2 bytes for END Tag +// +#define TPM_POS_RES_TEMPLATE_MIN_SIZE (1 + 1 + 2 + 12 + 5 + 2) + +// +// Max Interrupt buffer size for PRS interrupt resource +// Now support 15 interrupts in maxmum +// +#define MAX_PRS_INT_BUF_SIZE (15*4) + +#pragma pack(1) + +typedef struct { + EFI_ACPI_DESCRIPTION_HEADER Header; + // Flags field is replaced in version 4 and above + // BIT0~15: PlatformClass This field is only valid for version 4 and above + // BIT16~31: Reserved + UINT32 Flags; + UINT64 AddressOfControlArea; + UINT32 StartMethod; + UINT8 PlatformSpecificParameters[12]; // size up to 12 + UINT32 Laml; // Optional + UINT64 Lasa; // Optional +} EFI_TPM2_ACPI_TABLE_V4; + +#pragma pack() + +EFI_TPM2_ACPI_TABLE_V4 mTpm2AcpiTemplate = { + { + EFI_ACPI_5_0_TRUSTED_COMPUTING_PLATFORM_2_TABLE_SIGNATURE, + sizeof (mTpm2AcpiTemplate), + EFI_TPM2_ACPI_TABLE_REVISION, + // + // Compiler initializes the remaining bytes to 0 + // These fields should be filled in in production + // + }, + 0, // BIT0~15: PlatformClass + // BIT16~31: Reserved + 0, // Control Area + EFI_TPM2_ACPI_TABLE_START_METHOD_TIS, // StartMethod +}; + +TCG_NVS *mTcgNvs; + +/** + Find the operation region in TCG ACPI table by given Name and Size, + and initialize it if the region is found. + + @param[in, out] Table The TPM item in ACPI table. + @param[in] Name The name string to find in TPM table. + @param[in] Size The size of the region to find. + + @return The allocated address for the found region. + +**/ +VOID * +AssignOpRegion ( + EFI_ACPI_DESCRIPTION_HEADER *Table, + UINT32 Name, + UINT16 Size + ) +{ + EFI_STATUS Status; + AML_OP_REGION_32_8 *OpRegion; + EFI_PHYSICAL_ADDRESS MemoryAddress; + + MemoryAddress = SIZE_4GB - 1; + + // + // Patch some pointers for the ASL code before loading the SSDT. + // + for (OpRegion = (AML_OP_REGION_32_8 *) (Table + 1); + OpRegion <= (AML_OP_REGION_32_8 *) ((UINT8 *) Table + Table->Length); + OpRegion = (AML_OP_REGION_32_8 *) ((UINT8 *) OpRegion + 1)) { + if ((OpRegion->OpRegionOp == AML_EXT_REGION_OP) && + (OpRegion->NameString == Name) && + (OpRegion->DWordPrefix == AML_DWORD_PREFIX) && + (OpRegion->BytePrefix == AML_BYTE_PREFIX)) { + + Status = gBS->AllocatePages(AllocateMaxAddress, EfiACPIMemoryNVS, EFI_SIZE_TO_PAGES (Size), &MemoryAddress); + ASSERT_EFI_ERROR (Status); + ZeroMem ((VOID *)(UINTN)MemoryAddress, Size); + OpRegion->RegionOffset = (UINT32) (UINTN) MemoryAddress; + OpRegion->RegionLen = (UINT8) Size; + // Request to unblock this region from MM core + Status = MmUnblockMemoryRequest (MemoryAddress, EFI_SIZE_TO_PAGES (Size)); + if (Status != EFI_UNSUPPORTED && EFI_ERROR (Status)) { + ASSERT_EFI_ERROR (Status); + } + break; + } + } + + return (VOID *) (UINTN) MemoryAddress; +} + +/** + Locate the MM communication buffer and protocol, then use it to exchange information with + Tcg2StandaloneMmm on NVS address and SMI value. + + @param[in, out] TcgNvs The NVS subject to send to MM environment. + + @return The status for locating MM common buffer, communicate to MM, etc. + +**/ +EFI_STATUS +EFIAPI +ExchangeCommonBuffer ( + IN OUT TCG_NVS *TcgNvs +) +{ + EFI_STATUS Status; + EFI_MM_COMMUNICATION_PROTOCOL *MmCommunication; + EDKII_PI_SMM_COMMUNICATION_REGION_TABLE *PiSmmCommunicationRegionTable; + EFI_MEMORY_DESCRIPTOR *MmCommMemRegion; + EFI_MM_COMMUNICATE_HEADER *CommHeader; + TPM_NVS_MM_COMM_BUFFER *CommBuffer; + UINTN CommBufferSize; + UINTN Index; + + // Step 0: Sanity check for input argument + if (TcgNvs == NULL) { + DEBUG ((DEBUG_ERROR, "%a - Input argument is NULL!\n", __FUNCTION__)); + return EFI_INVALID_PARAMETER; + } + + // Step 1: Grab the common buffer header + Status = EfiGetSystemConfigurationTable (&gEdkiiPiSmmCommunicationRegionTableGuid, (VOID**) &PiSmmCommunicationRegionTable); + if (EFI_ERROR (Status)) { + DEBUG ((DEBUG_ERROR, "%a - Failed to locate SMM communciation common buffer - %r!\n", __FUNCTION__, Status)); + return Status; + } + + // Step 2: Grab one that is large enough to hold TPM_NVS_MM_COMM_BUFFER, the IPL one should be sufficient + CommBufferSize = 0; + MmCommMemRegion = (EFI_MEMORY_DESCRIPTOR*) (PiSmmCommunicationRegionTable + 1); + for (Index = 0; Index < PiSmmCommunicationRegionTable->NumberOfEntries; Index++) { + if (MmCommMemRegion->Type == EfiConventionalMemory) { + CommBufferSize = EFI_PAGES_TO_SIZE ((UINTN)MmCommMemRegion->NumberOfPages); + if (CommBufferSize >= (sizeof (TPM_NVS_MM_COMM_BUFFER) + OFFSET_OF (EFI_MM_COMMUNICATE_HEADER, Data))) { + break; + } + } + MmCommMemRegion = (EFI_MEMORY_DESCRIPTOR*)((UINT8*)MmCommMemRegion + PiSmmCommunicationRegionTable->DescriptorSize); + } + + if (Index >= PiSmmCommunicationRegionTable->NumberOfEntries) { + // Could not find one that meets our goal... + DEBUG ((DEBUG_ERROR, "%a - Could not find a common buffer that is big enough for NVS!\n", __FUNCTION__)); + return EFI_OUT_OF_RESOURCES; + } + + // Step 3: Start to populate contents + // Step 3.1: MM Communication common header + CommHeader = (EFI_MM_COMMUNICATE_HEADER *) (UINTN) MmCommMemRegion->PhysicalStart; + CommBufferSize = sizeof (TPM_NVS_MM_COMM_BUFFER) + OFFSET_OF (EFI_MM_COMMUNICATE_HEADER, Data); + ZeroMem (CommHeader, CommBufferSize); + CopyGuid (&CommHeader->HeaderGuid, &gTpmNvsMmGuid); + CommHeader->MessageLength = sizeof (TPM_NVS_MM_COMM_BUFFER); + + // Step 3.2: TPM_NVS_MM_COMM_BUFFER content per our needs + CommBuffer = (TPM_NVS_MM_COMM_BUFFER *) (CommHeader->Data); + CommBuffer->Function = TpmNvsMmExchangeInfo; + CommBuffer->TargetAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) TcgNvs; + + // Step 4: Locate the protocol and signal Mmi. + Status = gBS->LocateProtocol (&gEfiMmCommunicationProtocolGuid, NULL, (VOID**) &MmCommunication); + if (!EFI_ERROR (Status)) { + Status = MmCommunication->Communicate (MmCommunication, CommHeader, &CommBufferSize); + DEBUG ((DEBUG_INFO, "%a - Communicate() = %r\n", __FUNCTION__, Status)); + } + else { + DEBUG ((DEBUG_ERROR, "%a - Failed to locate MmCommunication protocol - %r\n", __FUNCTION__, Status)); + return Status; + } + + // Step 5: If everything goes well, populate the channel number + if (!EFI_ERROR (CommBuffer->ReturnStatus)) { + // Need to demote to UINT8 according to SMI value definition + TcgNvs->PhysicalPresence.SoftwareSmi = (UINT8) CommBuffer->RegisteredPpSwiValue; + TcgNvs->MemoryClear.SoftwareSmi = (UINT8) CommBuffer->RegisteredMcSwiValue; + DEBUG (( + DEBUG_INFO, + "%a Communication returned software SMI value. PP: 0x%x; MC: 0x%x.\n", + __FUNCTION__, + TcgNvs->PhysicalPresence.SoftwareSmi, + TcgNvs->MemoryClear.SoftwareSmi + )); + } + + return (EFI_STATUS) CommBuffer->ReturnStatus; +} + +/** + Patch version string of Physical Presence interface supported by platform. The initial string tag in TPM +ACPI table is "$PV". + + @param[in, out] Table The TPM item in ACPI table. + @param[in] PPVer Version string of Physical Presence interface supported by platform. + + @return The allocated address for the found region. + +**/ +EFI_STATUS +UpdatePPVersion ( + EFI_ACPI_DESCRIPTION_HEADER *Table, + CHAR8 *PPVer + ) +{ + EFI_STATUS Status; + UINT8 *DataPtr; + + // + // Patch some pointers for the ASL code before loading the SSDT. + // + for (DataPtr = (UINT8 *)(Table + 1); + DataPtr <= (UINT8 *) ((UINT8 *) Table + Table->Length - PHYSICAL_PRESENCE_VERSION_SIZE); + DataPtr += 1) { + if (AsciiStrCmp((CHAR8 *)DataPtr, PHYSICAL_PRESENCE_VERSION_TAG) == 0) { + Status = AsciiStrCpyS((CHAR8 *)DataPtr, PHYSICAL_PRESENCE_VERSION_SIZE, PPVer); + DEBUG((DEBUG_INFO, "TPM2 Physical Presence Interface Version update status 0x%x\n", Status)); + return Status; + } + } + + return EFI_NOT_FOUND; +} + +/** + Patch interrupt resources returned by TPM _PRS. ResourceTemplate to patch is determined by input + interrupt buffer size. BufferSize, PkgLength and interrupt descriptor in ByteList need to be patched + + @param[in, out] Table The TPM item in ACPI table. + @param[in] IrqBuffer Input new IRQ buffer. + @param[in] IrqBuffserSize Input new IRQ buffer size. + @param[out] IsShortFormPkgLength If _PRS returns Short length Package(ACPI spec 20.2.4). + + @return patch status. + +**/ +EFI_STATUS +UpdatePossibleResource ( + IN OUT EFI_ACPI_DESCRIPTION_HEADER *Table, + IN UINT32 *IrqBuffer, + IN UINT32 IrqBuffserSize, + OUT BOOLEAN *IsShortFormPkgLength + ) +{ + UINT8 *DataPtr; + UINT8 *DataEndPtr; + UINT32 NewPkgLength; + UINT32 OrignalPkgLength; + + NewPkgLength = 0; + OrignalPkgLength = 0; + DataEndPtr = NULL; + + // + // Follow ACPI spec + // 6.4.3 Extend Interrupt Descriptor. + // 19.3.3 ASL Resource Template + // 20 AML specification + // to patch TPM ACPI object _PRS returned ResourceTemplate() containing 2 resource descriptors and an auto appended End Tag + // + // AML data is organized by following rule. + // Code need to patch BufferSize and PkgLength and interrupt descriptor in ByteList + // + // ============= Buffer ==================== + // DefBuffer := BufferOp PkgLength BufferSize ByteList + // BufferOp := 0x11 + // + // ==============PkgLength================== + // PkgLength := PkgLeadByte | + // <PkgLeadByte ByteData> | + // <PkgLeadByte ByteData ByteData> | + // <PkgLeadByte ByteData ByteData ByteData> + // + // PkgLeadByte := <bit 7-6: ByteData count that follows (0-3)> + // <bit 5-4: Only used if PkgLength <= 63 > + // <bit 3-0: Least significant package length nybble> + // + //==============BufferSize================== + // BufferSize := Integer + // Integer := ByteConst|WordConst|DwordConst.... + // + // ByteConst := BytePrefix ByteData + // + //==============ByteList=================== + // ByteList := ByteData ByteList + // + //========================================= + + // + // 1. Check TPM_PRS_RESS with PkgLength <=63 can hold the input interrupt number buffer for patching + // + 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; +} + |