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8802583c48
https://bugzilla.tianocore.org/show_bug.cgi?id=3169 This change added Standalone MM instance of Tcg2. The notify function for Standalone MM instance is left empty. A dependency DXE driver with a Depex of gEfiMmCommunication2ProtocolGuid was created to indicate the readiness of Standalone MM Tcg2 driver. Lastly, the support of CI build for Tcg2 Standalone MM module is added. Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Jian J Wang <jian.j.wang@intel.com> Cc: Qi Zhang <qi1.zhang@intel.com> Cc: Rahul Kumar <rahul1.kumar@intel.com> Signed-off-by: Kun Qin <kun.q@outlook.com> Reviewed-by: Jiewen Yao <Jiewen.yao@intel.com> Message-Id: <MWHPR06MB3102C3F99CBADFCC5F8A821CF3969@MWHPR06MB3102.namprd06.prod.outlook.com>
72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/** @file
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TCG2 Standalone MM driver that updates TPM2 items in ACPI table and registers
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SMI2 callback functions for Tcg2 physical presence, ClearMemory, and
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sample for dTPM StartMethod.
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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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PhysicalPresenceCallback() and MemoryClearCallback() will receive untrusted input and do some check.
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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 "Tcg2Smm.h"
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#include <Library/StandaloneMmMemLib.h>
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/**
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Notify the system that the SMM variable driver is ready.
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**/
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VOID
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Tcg2NotifyMmReady (
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VOID
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)
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{
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// Do nothing
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}
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/**
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This function is an abstraction layer for implementation specific Mm buffer validation routine.
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@param Buffer The buffer start address to be checked.
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@param Length The buffer length to be checked.
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@retval TRUE This buffer is valid per processor architecture and not overlap with SMRAM.
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@retval FALSE This buffer is not valid per processor architecture or overlap with SMRAM.
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**/
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BOOLEAN
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IsBufferOutsideMmValid (
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IN EFI_PHYSICAL_ADDRESS Buffer,
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IN UINT64 Length
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)
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{
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return MmIsBufferOutsideMmValid (Buffer, Length);
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}
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/**
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The driver's entry point.
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It install callbacks for TPM physical presence and MemoryClear, and locate
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SMM variable to be used in the callback function.
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@param[in] ImageHandle The firmware allocated handle for the EFI image.
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@param[in] SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The entry point is executed successfully.
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@retval Others Some error occurs when executing this entry point.
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**/
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EFI_STATUS
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EFIAPI
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InitializeTcgStandaloneMm (
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IN EFI_HANDLE ImageHandle,
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IN EFI_MM_SYSTEM_TABLE *SystemTable
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)
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{
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return InitializeTcgCommon ();
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}
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