WsmtParser.c File Reference

#include <Library/UefiLib.h>
#include <IndustryStandard/WindowsSmmSecurityMitigationTable.h>
#include "AcpiParser.h"

Go to the source code of this file.

Functions
STATIC VOID EFIAPI	ValidateWsmtProtectionFlag (IN UINT8 *Ptr, IN UINT32 Length, IN VOID *Context)
STATIC VOID EFIAPI	ValidateReserved (IN UINT8 *Ptr, IN UINT32 Length, IN VOID *Context)
VOID EFIAPI	DumpWsmtProtectionFlag (IN CONST CHAR16 *Format OPTIONAL, IN UINT8 *Ptr, IN UINT32 Length)
VOID EFIAPI	ParseAcpiWsmt (IN BOOLEAN Trace, IN UINT8 *Ptr, IN UINT32 AcpiTableLength, IN UINT8 AcpiTableRevision)

Variables
STATIC ACPI_DESCRIPTION_HEADER_INFO	AcpiHdrInfo
STATIC CONST ACPI_PARSER	WsmtProtectionFlagParser []
STATIC CONST ACPI_PARSER	WsmtParser []

Detailed Description

WSMT table parser

Copyright (c) 2024, Arm Limited. All rights reserved. Copyright (C) 2024 Advanced Micro Devices, Inc. All rights reserved. SPDX-License-Identifier: BSD-2-Clause-Patent

Reference(s):

• Windows SMM Security Mitigation Table spec, version 1.0

Definition in file WsmtParser.c.

Function Documentation

DumpWsmtProtectionFlag()

VOID EFIAPI DumpWsmtProtectionFlag	(	IN CONST CHAR16 *Format	OPTIONAL,
		IN UINT8 *	Ptr,
		IN UINT32	Length
	)

This function prints WSMT Protection flag. If no format string is specified the Format must be NULL.

Parameters

[in]	Format	Optional format string for tracing the data.
[in]	Ptr	Pointer to the start of the buffer.

Definition at line 98 of file WsmtParser.c.

ParseAcpiWsmt()

VOID EFIAPI ParseAcpiWsmt	(	IN BOOLEAN	Trace,
		IN UINT8 *	Ptr,
		IN UINT32	AcpiTableLength,
		IN UINT8	AcpiTableRevision
	)

This function parses the ACPI WSMT table.

Parameters

[in]	Trace	If TRUE, trace the ACPI fields.
[in]	Ptr	Pointer to the start of the buffer.
[in]	AcpiTableLength	Length of the ACPI table.
[in]	AcpiTableRevision	Revision of the ACPI table.

Definition at line 138 of file WsmtParser.c.

ValidateReserved()

STATIC VOID EFIAPI ValidateReserved	(	IN UINT8 *	Ptr,
		IN UINT32	Length,
		IN VOID *	Context
	)

This function validates the reserved bits in the WSMT Protection flag.

Parameters

[in]	Ptr	Pointer to the start of the buffer.
[in]	Length	Length of the field.
[in]	Context	Pointer to context specific information e.g. this could be a pointer to the ACPI table header.

Definition at line 63 of file WsmtParser.c.

ValidateWsmtProtectionFlag()

STATIC VOID EFIAPI ValidateWsmtProtectionFlag	(	IN UINT8 *	Ptr,
		IN UINT32	Length,
		IN VOID *	Context
	)

This function validates the WSMT Protection flag.

Parameters

[in]	Ptr	Pointer to the start of the buffer.
[in]	Length	Length of the field.
[in]	Context	Pointer to context specific information e.g. this could be a pointer to the ACPI table header.

Definition at line 30 of file WsmtParser.c.

Variable Documentation

AcpiHdrInfo

STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo

Definition at line 16 of file WsmtParser.c.

WsmtParser

STATIC CONST ACPI_PARSER WsmtParser[]

Initial value:

= {
  PARSE_ACPI_HEADER (&AcpiHdrInfo),
  { L"Protection Flag",            4,36, NULL, DumpWsmtProtectionFlag, NULL, ValidateWsmtProtectionFlag, NULL }
}

An ACPI_PARSER array describing the ACPI WSMT Table.

Definition at line 123 of file WsmtParser.c.

WsmtProtectionFlagParser

STATIC CONST ACPI_PARSER WsmtProtectionFlagParser[]

Initial value:

= {
  { L"FIXED_COMM_BUFFERS ",                1,  0, L"0x%x", NULL, NULL, NULL,             NULL },
  { L"COMM_BUFFER_NESTED_PTR_PROTECTION ", 1,  1, L"0x%x", NULL, NULL, NULL,             NULL },
  { L"SYSTEM_RESOURCE_PROTECTION ",        1,  2, L"0x%x", NULL, NULL, NULL,             NULL },
  { L"Reserved ",                          29, 3, L"0x%x", NULL, NULL, ValidateReserved, NULL },
}

An ACPI_PARSER array describing the WSMT Protection flag .

Definition at line 82 of file WsmtParser.c.