diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/SecurityPkg/Tcg/Tcg2Smm/Tcg2StandaloneMm.c')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/SecurityPkg/Tcg/Tcg2Smm/Tcg2StandaloneMm.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/SecurityPkg/Tcg/Tcg2Smm/Tcg2StandaloneMm.c b/src/VBox/Devices/EFI/Firmware/SecurityPkg/Tcg/Tcg2Smm/Tcg2StandaloneMm.c new file mode 100644 index 00000000..c194a132 --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/SecurityPkg/Tcg/Tcg2Smm/Tcg2StandaloneMm.c @@ -0,0 +1,71 @@ +/** @file + TCG2 Standalone MM driver that updates TPM2 items in ACPI table and registers + SMI2 callback functions for Tcg2 physical presence, ClearMemory, and + sample for dTPM StartMethod. + + 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. + + PhysicalPresenceCallback() and MemoryClearCallback() will receive untrusted input and do some check. + +Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR> +Copyright (c) Microsoft Corporation. +SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include "Tcg2Smm.h" +#include <Library/StandaloneMmMemLib.h> + +/** + Notify the system that the SMM variable driver is ready. +**/ +VOID +Tcg2NotifyMmReady ( + VOID + ) +{ + // Do nothing +} + +/** + This function is an abstraction layer for implementation specific Mm buffer validation routine. + + @param Buffer The buffer start address to be checked. + @param Length The buffer length to be checked. + + @retval TRUE This buffer is valid per processor architecture and not overlap with SMRAM. + @retval FALSE This buffer is not valid per processor architecture or overlap with SMRAM. +**/ +BOOLEAN +IsBufferOutsideMmValid ( + IN EFI_PHYSICAL_ADDRESS Buffer, + IN UINT64 Length + ) +{ + return MmIsBufferOutsideMmValid (Buffer, Length); +} + +/** + The driver's entry point. + + It install callbacks for TPM physical presence and MemoryClear, and locate + SMM variable to be used in the callback function. + + @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 +InitializeTcgStandaloneMm ( + IN EFI_HANDLE ImageHandle, + IN EFI_MM_SYSTEM_TABLE *SystemTable + ) +{ + return InitializeTcgCommon (); +} |