[edk2-devel] [edk2-platforms][PATCH v2 1/1] MinPlatformPkg/Acpi/AcpiSmm: Add Standalone MM support
Nate DeSimone
nathaniel.l.desimone at intel.com
Fri Apr 2 01:26:06 UTC 2021
Hi Michael,
Reply is inline.
Thanks,
Nate
> -----Original Message-----
> From: Michael Kubacki <mikuback at linux.microsoft.com>
> Sent: Thursday, April 1, 2021 5:50 PM
> To: Desimone, Nathaniel L <nathaniel.l.desimone at intel.com>;
> devel at edk2.groups.io; Chiu, Chasel <chasel.chiu at intel.com>; Liming Gao
> <gaoliming at byosoft.com.cn>; Dong, Eric <eric.dong at intel.com>
> Subject: Re: [edk2-devel] [edk2-platforms][PATCH v2 1/1]
> MinPlatformPkg/Acpi/AcpiSmm: Add Standalone MM support
>
> Hi Nate,
>
> Reply is inline.
>
> Thanks,
> Michael
>
> On 4/1/2021 12:47 PM, Desimone, Nathaniel L wrote:
> > Hi Michael,
> >
> > Review comments inline.
> >
> > Thanks,
> > Nate
> >
> >> -----Original Message-----
> >> From: devel at edk2.groups.io <devel at edk2.groups.io> On Behalf Of
> >> Michael Kubacki
> >> Sent: Friday, March 26, 2021 6:45 PM
> >> To: devel at edk2.groups.io; Chiu, Chasel <chasel.chiu at intel.com>;
> >> Desimone, Nathaniel L <nathaniel.l.desimone at intel.com>; Liming Gao
> >> <gaoliming at byosoft.com.cn>; Dong, Eric <eric.dong at intel.com>
> >> Subject: Re: [edk2-devel] [edk2-platforms][PATCH v2 1/1]
> >> MinPlatformPkg/Acpi/AcpiSmm: Add Standalone MM support
> >>
> >> Sending a review reminder since it's been a few weeks.
> >>
> >> Thanks,
> >> Michael
> >>
> >> On 3/8/2021 9:17 AM, Michael Kubacki wrote:
> >>> From: Michael Kubacki <michael.kubacki at microsoft.com>
> >>>
> >>> REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3248
> >>>
> >>> Adds a new module called AcpiStandaloneMm that serves the same role
> >>> as AcpiSmm but in a Standalone MM environment.
> >>>
> >>> This change follows a similar pattern to other changes that have
> >>> added Standalone MM support to a SMM module. The SMM INF name
> and
> >>> file
> >> path
> >>> remain unaltered to allow backward compatibility and much of the
> >>> code is shared between the driver instances with unique entry points
> >>> for each respective module type.
> >>>
> >>> Cc: Chasel Chiu <chasel.chiu at intel.com>
> >>> Cc: Nate DeSimone <nathaniel.l.desimone at intel.com>
> >>> Cc: Liming Gao <gaoliming at byosoft.com.cn>
> >>> Cc: Eric Dong <eric.dong at intel.com>
> >>> Signed-off-by: Michael Kubacki <michael.kubacki at microsoft.com>
> >>> ---
> >>>
> >>> Notes:
> >>> V2 change: Add BZ link
> >>>
> >>> Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/{AcpiSmm.c =>
> >>> AcpiMm.c}
> >> | 33 +++++++++----------
> >>> Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiStandaloneMm.c
> >> | 34 ++++++++++++++++++++
> >>> Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiTraditionalMm.c
> >> | 34 ++++++++++++++++++++
> >>> Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiMm.h
> |
> >> 23 +++++++++++++
> >>> Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.h
> >> | 24 --------------
> >>> Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.inf
> >> | 21 ++++++------
> >>> Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/{AcpiSmm.inf =>
> >> AcpiStandaloneMm.inf} | 32 +++++++++---------
> >>> Platform/Intel/MinPlatformPkg/MinPlatformPkg.dsc |
> 2
> >> ++
> >>> 8 files changed, 133 insertions(+), 70 deletions(-)
> >>>
> >>> diff --git a/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.c
> >>> b/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiMm.c
> >>> similarity index 81%
> >>> rename from
> Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.c
> >>> rename to Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiMm.c
> >>> index 809f75d3c588..2cf559f3fe09 100644
> >>> --- a/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.c
> >>> +++ b/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiMm.c
> >>> @@ -1,12 +1,20 @@
> >>> /** @file
> >>> - Acpi Smm driver.
> >>> + Functions shared between driver instances.
> >>>
> >>> Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
> >>> +Copyright (c) Microsoft Corporation.<BR>
> >>> SPDX-License-Identifier: BSD-2-Clause-Patent
> >>>
> >>> **/
> >>>
> >>> -#include "AcpiSmm.h"
> >>> +#include <PiMm.h>
> >>> +#include <Library/BoardAcpiEnableLib.h> #include
> >>> +<Library/DebugLib.h> #include <Library/MmServicesTableLib.h>
> >>> +#include <Library/PcdLib.h> #include <Protocol/SmmSwDispatch2.h>
> >>> +
> >>> +#include "AcpiMm.h"
> >>>
> >>> /**
> >>> Enable SCI
> >>> @@ -53,20 +61,13 @@ DisableAcpiCallback (
> >>> }
> >>>
> >>> /**
> >>> - Initializes the Acpi Smm Driver
> >>> -
> >>> - @param[in] ImageHandle - Pointer to the loaded image protocol for
> this
> >> driver
> >>> - @param[in] SystemTable - Pointer to the EFI System Table
> >>> -
> >>> - @retval Status - EFI_SUCCESS
> >>> - @retval Assert, otherwise.
> >>> + ACPI initialization logic shared between the Traditional MM and
> >>> + Standalone MM driver instances.
> >>>
> >>> **/
> >>> -EFI_STATUS
> >>> -EFIAPI
> >>> -InitializeAcpiSmm (
> >>> - IN EFI_HANDLE ImageHandle,
> >>> - IN EFI_SYSTEM_TABLE *SystemTable
> >>> +VOID
> >>> +InitializeAcpiMm (
> >>> + VOID
> >>> )
> >>> {
> >>> EFI_STATUS Status;
> >>> @@ -77,7 +78,7 @@ InitializeAcpiSmm (
> >>> //
> >>> // Locate the ICH SMM SW dispatch protocol
> >>> //
> >>> - Status = gSmst->SmmLocateProtocol
> >> (&gEfiSmmSwDispatch2ProtocolGuid,
> >>> NULL, (VOID**)&SwDispatch);
> >>> + Status = gMmst->MmLocateProtocol
> >> (&gEfiSmmSwDispatch2ProtocolGuid,
> >>> + NULL, (VOID**) &SwDispatch);
> >>> ASSERT_EFI_ERROR (Status);
> >>>
> >>> //
> >>> @@ -103,6 +104,4 @@ InitializeAcpiSmm (
> >>> &SwHandle
> >>> );
> >>> ASSERT_EFI_ERROR (Status);
> >>> -
> >>> - return EFI_SUCCESS;
> >>> }
> >>> diff --git
> >>> a/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiStandaloneMm.c
> >>> b/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiStandaloneMm.c
> >>> new file mode 100644
> >>> index 000000000000..f378942fdc07
> >>> --- /dev/null
> >>> +++
> >> b/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiStandaloneMm.c
> >>> @@ -0,0 +1,34 @@
> >>> +/** @file
> >>> + Standalone MM driver for ACPI initialization.
> >>> +
> >>> +Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
> >>> +Copyright (c) Microsoft Corporation.<BR>
> >>> +SPDX-License-Identifier: BSD-2-Clause-Patent
> >>> +
> >>> +**/
> >>> +
> >>> +#include <PiMm.h>
> >>> +
> >>> +#include "AcpiMm.h"
> >>> +
> >>> +/**
> >>> + The Standalone MM driver entry point.
> >>> +
> >>> + @param[in] ImageHandle - Pointer to the loaded image protocol for
> this
> >> driver
> >>> + @param[in] SystemTable - Pointer to the EFI MM System Table
> >>> +
> >>> + @retval Status - EFI_SUCCESS
> >>> + @retval Assert, otherwise.
> >>> +
> >>> +**/
> >>> +EFI_STATUS
> >>> +EFIAPI
> >>> +AcpiStandaloneMmEntryPoint (
> >>> + IN EFI_HANDLE ImageHandle,
> >>> + IN EFI_MM_SYSTEM_TABLE *MmSystemTable
> >>> + )
> >>> +{
> >>> + InitializeAcpiMm ();
> >>> +
> >>> + return EFI_SUCCESS;
> >>> +}
> >>> diff --git
> >>> a/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiTraditionalMm.c
> >>> b/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiTraditionalMm.c
> >>> new file mode 100644
> >>> index 000000000000..9512926b9e2e
> >>> --- /dev/null
> >>> +++
> b/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiTraditionalMm.c
> >>> @@ -0,0 +1,34 @@
> >>> +/** @file
> >>> + Traditional MM driver for ACPI initialization.
> >>> +
> >>> +Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
> >>> +Copyright (c) Microsoft Corporation.<BR>
> >>> +SPDX-License-Identifier: BSD-2-Clause-Patent
> >>> +
> >>> +**/
> >>> +
> >>> +#include <PiMm.h>
> >>> +
> >>> +#include "AcpiMm.h"
> >>> +
> >>> +/**
> >>> + The Traditional MM driver entry point.
> >>> +
> >>> + @param[in] ImageHandle - Pointer to the loaded image protocol for
> this
> >> driver
> >>> + @param[in] SystemTable - Pointer to the EFI System Table
> >>> +
> >>> + @retval Status - EFI_SUCCESS
> >>> + @retval Assert, otherwise.
> >>> +
> >>> +**/
> >>> +EFI_STATUS
> >>> +EFIAPI
> >>> +AcpiTraditionalMmEntryPoint (
> >
> > Please rename this to AcpiSmmEntryPoint(). To my knowledge the
> verbiage "Traditional MM" is not used anywhere else and "SMM" does a
> pretty good job of denoting this is the older path.
> >
>
> Where exactly do you mean by anywhere else?
>
> It has a fair amount of usage in converted modules in edk2:
> -
> https://github.com/tianocore/edk2/blob/master/MdeModulePkg/Universal
> /StatusCodeHandler/Smm/StatusCodeHandlerSmm.inf
> -
> https://github.com/tianocore/edk2/blob/master/MdeModulePkg/Universal
> /FaultTolerantWriteDxe/FaultTolerantWriteSmm.inf
> -
> https://github.com/tianocore/edk2/blob/master/MdeModulePkg/Library/S
> mmLockBoxLib/SmmLockBoxSmmLib.inf
> -
> https://github.com/tianocore/edk2/blob/master/MdeModulePkg/Universal
> /Variable/RuntimeDxe/VariableSmm.inf
> -
> https://github.com/tianocore/edk2/blob/master/SecurityPkg/Tcg/Tcg2Smm
> /Tcg2Smm.inf
>
> I also used this pattern when making the
> MinPlatformPkg/Flash/SpiFvbService change:
> -
> https://github.com/tianocore/edk2-
> platforms/commit/f62887cbb37e846e6768ed05d6ac55f7288388dd
Fair enough, I haven't been keeping up on the latest developments in this area. It’s a little unclear to me what the difference is between VariableTraditionalMm.c and VariableSmm.c... but that is beside the point. I retract my previous comment.
>
> I don't have a strong preference but this pattern is similar to those changes.
>
> >>> + IN EFI_HANDLE ImageHandle,
> >>> + IN EFI_SYSTEM_TABLE *SystemTable
> >>> + )
> >>> +{
> >>> + InitializeAcpiMm ();
> >>> +
> >>> + return EFI_SUCCESS;
> >>> +}
> >>> diff --git a/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiMm.h
> >>> b/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiMm.h
> >>> new file mode 100644
> >>> index 000000000000..051474b0e833
> >>> --- /dev/null
> >>> +++ b/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiMm.h
> >>> @@ -0,0 +1,23 @@
> >>> +/** @file
> >>> + Internal header file for the ACPI MM driver.
> >>> +
> >>> +Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
> >>> +Copyright (c) Microsoft Corporation.<BR>
> >>> +SPDX-License-Identifier: BSD-2-Clause-Patent
> >>> +
> >>> +**/
> >>> +
> >>> +#ifndef _ACPI_MM_H_
> >>> +#define _ACPI_MM_H_
> >>> +
> >>> +/**
> >>> + ACPI initialization logic shared between the Traditional MM and
> >>> + Standalone MM driver instances.
> >>> +
> >>> +**/
> >>> +VOID
> >>> +InitializeAcpiMm (
> >>> + VOID
> >>> + );
> >>> +
> >>> +#endif
> >>> diff --git a/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.h
> >>> b/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.h
> >>> deleted file mode 100644
> >>> index e34ffb1b755b..000000000000
> >>> --- a/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.h
> >>> +++ /dev/null
> >>> @@ -1,24 +0,0 @@
> >>> -/** @file
> >>> - Header file for the Smm platform driver.
> >>> -
> >>> -Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
> >>> -SPDX-License-Identifier: BSD-2-Clause-Patent
> >>> -
> >>> -**/
> >>> -
> >>> -#ifndef _ACPI_SMM_H_
> >>> -#define _ACPI_SMM_H_
> >>> -
> >>> -#include <PiSmm.h>
> >>> -#include <Library/DebugLib.h>
> >>> -#include <Library/HobLib.h>
> >>> -#include <Library/IoLib.h>
> >>> -#include <Library/PcdLib.h>
> >>> -#include <Library/UefiBootServicesTableLib.h>
> >>> -#include <Library/UefiLib.h>
> >>> -#include <Library/SmmServicesTableLib.h> -#include
> >>> <Library/BoardAcpiEnableLib.h> -#include
> <Protocol/SmmSwDispatch2.h>
> >>> -
> >>> -#endif
> >>> -
> >>> diff --git a/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.inf
> >>> b/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.inf
> >>> index fbaf46752563..651d4a293e9b 100644
> >>> --- a/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.inf
> >>> +++ b/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.inf
> >>> @@ -1,7 +1,8 @@
> >>> ### @file
> >>> -# Component information file for ACPI SMM module.
> >>> +# Component information file for ACPI Traditional MM module.
> >>> #
> >>> # Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
> >>> +# Copyright (c) Microsoft Corporation.<BR>
> >>> #
> >>> # SPDX-License-Identifier: BSD-2-Clause-Patent
> >>> #
> >>> @@ -14,18 +15,15 @@ [Defines]
> >>> VERSION_STRING = 1.0
> >>> MODULE_TYPE = DXE_SMM_DRIVER
> >>> PI_SPECIFICATION_VERSION = 1.20
> >>> - ENTRY_POINT = InitializeAcpiSmm
> >>> + ENTRY_POINT = AcpiTraditionalMmEntryPoint
> >>>
> >>> [LibraryClasses]
> >>> - UefiDriverEntryPoint
> >>> - UefiBootServicesTableLib
> >>> + BoardAcpiEnableLib
> >>> DebugLib
> >>> - HobLib
> >>> - IoLib
> >>> + MmServicesTableLib
> >>> PcdLib
> >>> + UefiDriverEntryPoint
> >>> UefiLib
> >>> - SmmServicesTableLib
> >>> - BoardAcpiEnableLib
> >>>
> >>> [Packages]
> >>> MdePkg/MdePkg.dec
> >>> @@ -36,13 +34,12 @@ [Pcd]
> >>> gMinPlatformPkgTokenSpaceGuid.PcdAcpiDisableSwSmi ##
> >> CONSUMES
> >>>
> >>> [Sources]
> >>> - AcpiSmm.h
> >>> - AcpiSmm.c
> >>> + AcpiMm.h
> >>> + AcpiMm.c
> >>> + AcpiTraditionalMm.c
> >>>
> >>> [Protocols]
> >>> gEfiSmmSwDispatch2ProtocolGuid ## CONSUMES
> >>>
> >>> -[Guids]
> >>> -
> >>> [Depex]
> >>> gEfiSmmSwDispatch2ProtocolGuid
> >>> diff --git a/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.inf
> >>>
> b/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiStandaloneMm.inf
> >>> similarity index 50%
> >>> copy from Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.inf
> >>> copy to
> >>> Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiStandaloneMm.inf
> >>> index fbaf46752563..f7d0861b512d 100644
> >>> --- a/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.inf
> >>> +++
> >> b/Platform/Intel/MinPlatformPkg/Acpi/AcpiSmm/AcpiStandaloneMm.inf
> >>> @@ -1,7 +1,8 @@
> >>> ### @file
> >>> -# Component information file for ACPI SMM module.
> >>> +# Component information file for ACPI Standalone MM module.
> >>> #
> >>> # Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
> >>> +# Copyright (c) Microsoft Corporation.<BR>
> >>> #
> >>> # SPDX-License-Identifier: BSD-2-Clause-Patent
> >>> #
> >>> @@ -9,40 +10,37 @@
> >>>
> >>> [Defines]
> >>> INF_VERSION = 0x00010017
> >>> - BASE_NAME = AcpiSmm
> >>> - FILE_GUID = DF9A9FFC-A075-4867-A0B2-5E7540BB023E
> >>> + BASE_NAME = AcpiStandaloneMm
> >>> + FILE_GUID = F113611F-DEE7-4137-8623-0168675E9F6D
> >>> VERSION_STRING = 1.0
> >>> - MODULE_TYPE = DXE_SMM_DRIVER
> >>> - PI_SPECIFICATION_VERSION = 1.20
> >>> - ENTRY_POINT = InitializeAcpiSmm
> >>> + MODULE_TYPE = MM_STANDALONE
> >>> + PI_SPECIFICATION_VERSION = 0x00010032
> >>> + ENTRY_POINT = AcpiStandaloneMmEntryPoint
> >>>
> >>> [LibraryClasses]
> >>> - UefiDriverEntryPoint
> >>> - UefiBootServicesTableLib
> >>> + BoardAcpiEnableLib
> >>> DebugLib
> >>> - HobLib
> >>> - IoLib
> >>> + MmServicesTableLib
> >>> PcdLib
> >>> - UefiLib
> >>> - SmmServicesTableLib
> >>> - BoardAcpiEnableLib
> >>> + StandaloneMmDriverEntryPoint
> >>>
> >>> [Packages]
> >>> MdePkg/MdePkg.dec
> >>> MinPlatformPkg/MinPlatformPkg.dec
> >>>
> >>> +# Note: All PCDs consumed in the Standalone MM instance must be
> >>> +either
> >> FixedAtBuild
> >>> +# or PatchableInModule
> >>> [Pcd]
> >>> gMinPlatformPkgTokenSpaceGuid.PcdAcpiEnableSwSmi ##
> >> CONSUMES
> >>> gMinPlatformPkgTokenSpaceGuid.PcdAcpiDisableSwSmi ##
> >> CONSUMES
> >>>
> >>> [Sources]
> >>> - AcpiSmm.h
> >>> - AcpiSmm.c
> >>> + AcpiMm.h
> >>> + AcpiMm.c
> >>> + AcpiStandaloneMm.c
> >>>
> >>> [Protocols]
> >>> gEfiSmmSwDispatch2ProtocolGuid ## CONSUMES
> >>>
> >>> -[Guids]
> >>> -
> >>> [Depex]
> >>> gEfiSmmSwDispatch2ProtocolGuid
> >>> diff --git a/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dsc
> >>> b/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dsc
> >>> index 0460fd5a3206..998ee7909568 100644
> >>> --- a/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dsc
> >>> +++ b/Platform/Intel/MinPlatformPkg/MinPlatformPkg.dsc
> >>> @@ -117,6 +117,7 @@ [LibraryClasses.common.MM_STANDALONE]
> >>> DebugLib|MdePkg/Library/BaseDebugLibNull/BaseDebugLibNull.inf
> >>>
> >>
> MemoryAllocationLib|StandaloneMmPkg/Library/StandaloneMmMemoryAll
> >> ocationLib/StandaloneMmMemoryAllocationLib.inf
> >>>
> >>>
> >>
> MmServicesTableLib|MdePkg/Library/StandaloneMmServicesTableLib/Stan
> >> dal
> >>> oneMmServicesTableLib.inf
> >>> + PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
> >>>
> >>
> SpiFlashCommonLib|MinPlatformPkg/Flash/Library/SpiFlashCommonLibNull/
> >> SpiFlashCommonLibNull.inf
> >>>
> >>>
> >>
> StandaloneMmDriverEntryPoint|MdePkg/Library/StandaloneMmDriverEntry
> >> Poi
> >>> nt/StandaloneMmDriverEntryPoint.inf
> >>>
> >>> @@ -147,6 +148,7 @@ [Components]
> >>>
> >>> MinPlatformPkg/Acpi/AcpiTables/AcpiPlatform.inf
> >>> MinPlatformPkg/Acpi/AcpiSmm/AcpiSmm.inf
> >>> + MinPlatformPkg/Acpi/AcpiSmm/AcpiStandaloneMm.inf
> >>> MinPlatformPkg/Acpi/Library/DxeAslUpdateLib/DxeAslUpdateLib.inf
> >>>
> >> MinPlatformPkg/Acpi/Library/BoardAcpiLibNull/BoardAcpiEnableLibNull.i
> >> nf
> >>>
> >>> MinPlatformPkg/Acpi/Library/BoardAcpiLibNull/BoardAcpiTableLibNull.i
> >>> nf
> >>>
> >>
> >>
> >>
> >>
> >
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