diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/SecurityPkg/Library/Tpm2DeviceLibRouter/Tpm2DeviceLibRouterPei.c')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/SecurityPkg/Library/Tpm2DeviceLibRouter/Tpm2DeviceLibRouterPei.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/SecurityPkg/Library/Tpm2DeviceLibRouter/Tpm2DeviceLibRouterPei.c b/src/VBox/Devices/EFI/Firmware/SecurityPkg/Library/Tpm2DeviceLibRouter/Tpm2DeviceLibRouterPei.c new file mode 100644 index 00000000..1ca9f8c1 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/SecurityPkg/Library/Tpm2DeviceLibRouter/Tpm2DeviceLibRouterPei.c @@ -0,0 +1,137 @@ +/** @file + This library is TPM2 device router. Platform can register multi TPM2 instance to it + via PcdTpmInstanceGuid. Platform need make choice that which one will be final one. + At most one TPM2 instance can be finally registered, and other will return unsupported. + +Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved. <BR> +SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include <Library/BaseLib.h> +#include <Library/BaseMemoryLib.h> +#include <Library/HobLib.h> +#include <Library/DebugLib.h> +#include <Library/PcdLib.h> +#include <Library/Tpm2DeviceLib.h> + +EFI_GUID mInternalTpm2DeviceInterfaceGuid = { + 0x349cf818, 0xc0ba, 0x4c43, { 0x92, 0x9a, 0xc8, 0xa1, 0xb1, 0xb3, 0xd2, 0x55 } +}; + +/** + This function get TPM2.0 interface. + + @retval TPM2.0 interface. +**/ +TPM2_DEVICE_INTERFACE * +InternalGetTpm2DeviceInterface ( + VOID + ) +{ + EFI_HOB_GUID_TYPE *Hob; + + Hob = GetFirstGuidHob (&mInternalTpm2DeviceInterfaceGuid); + if (Hob == NULL) { + return NULL; + } + return (TPM2_DEVICE_INTERFACE *)(Hob + 1); +} + +/** + This service enables the sending of commands to the TPM2. + + @param[in] InputParameterBlockSize Size of the TPM2 input parameter block. + @param[in] InputParameterBlock Pointer to the TPM2 input parameter block. + @param[in,out] OutputParameterBlockSize Size of the TPM2 output parameter block. + @param[in] OutputParameterBlock Pointer to the TPM2 output parameter block. + + @retval EFI_SUCCESS The command byte stream was successfully sent to the device and a response was successfully received. + @retval EFI_DEVICE_ERROR The command was not successfully sent to the device or a response was not successfully received from the device. + @retval EFI_BUFFER_TOO_SMALL The output parameter block is too small. +**/ +EFI_STATUS +EFIAPI +Tpm2SubmitCommand ( + IN UINT32 InputParameterBlockSize, + IN UINT8 *InputParameterBlock, + IN OUT UINT32 *OutputParameterBlockSize, + IN UINT8 *OutputParameterBlock + ) +{ + TPM2_DEVICE_INTERFACE *Tpm2DeviceInterface; + + Tpm2DeviceInterface = InternalGetTpm2DeviceInterface (); + if (Tpm2DeviceInterface == NULL) { + return EFI_UNSUPPORTED; + } + + return Tpm2DeviceInterface->Tpm2SubmitCommand ( + InputParameterBlockSize, + InputParameterBlock, + OutputParameterBlockSize, + OutputParameterBlock + ); +} + +/** + This service requests use TPM2. + + @retval EFI_SUCCESS Get the control of TPM2 chip. + @retval EFI_NOT_FOUND TPM2 not found. + @retval EFI_DEVICE_ERROR Unexpected device behavior. +**/ +EFI_STATUS +EFIAPI +Tpm2RequestUseTpm ( + VOID + ) +{ + TPM2_DEVICE_INTERFACE *Tpm2DeviceInterface; + + Tpm2DeviceInterface = InternalGetTpm2DeviceInterface (); + if (Tpm2DeviceInterface == NULL) { + return EFI_UNSUPPORTED; + } + return Tpm2DeviceInterface->Tpm2RequestUseTpm (); +} + +/** + This service register TPM2 device. + + @param Tpm2Device TPM2 device + + @retval EFI_SUCCESS This TPM2 device is registered successfully. + @retval EFI_UNSUPPORTED System does not support register this TPM2 device. + @retval EFI_ALREADY_STARTED System already register this TPM2 device. +**/ +EFI_STATUS +EFIAPI +Tpm2RegisterTpm2DeviceLib ( + IN TPM2_DEVICE_INTERFACE *Tpm2Device + ) +{ + TPM2_DEVICE_INTERFACE *Tpm2DeviceInterface; + + if (!CompareGuid (PcdGetPtr(PcdTpmInstanceGuid), &Tpm2Device->ProviderGuid)){ + DEBUG ((DEBUG_WARN, "WARNING: Tpm2RegisterTpm2DeviceLib - does not support %g registration\n", &Tpm2Device->ProviderGuid)); + return EFI_UNSUPPORTED; + } + + Tpm2DeviceInterface = InternalGetTpm2DeviceInterface (); + if (Tpm2DeviceInterface != NULL) { + // + // In PEI phase, there will be shadow driver dispatched again. + // + DEBUG ((EFI_D_INFO, "Tpm2RegisterTpm2DeviceLib - Override\n")); + CopyMem (Tpm2DeviceInterface, Tpm2Device, sizeof(*Tpm2Device)); + return EFI_SUCCESS; + } else { + Tpm2Device = BuildGuidDataHob (&mInternalTpm2DeviceInterfaceGuid, Tpm2Device, sizeof(*Tpm2Device)); + if (Tpm2Device != NULL) { + return EFI_SUCCESS; + } else { + return EFI_OUT_OF_RESOURCES; + } + } +} |