Hi Liming,

You mentioned patch rename the DevicePathUtilitiesStandaloneMm to 
UefiDevicePathLibBase, but there are some consumer in intel platform still use 
the DevicePathUtilitiesStandaloneMm, so downstream will failed in CI because it 
cannot find DevicePathUtilitiesStandaloneMm. So the 
DevicePathUtilitiesStandaloneMm and UefiDevicePathLibBase must exist at the 
same time for a period of time. After downstream finished and platform change 
to use UefiDevicePathLibBase, then DevicePathUtilitiesStandaloneMm can be 
deleted.

Best Regards,
Yanbo Huang

-----Original Message-----
From: gaoliming <gaolim...@byosoft.com.cn> 
Sent: Friday, August 5, 2022 11:16 AM
To: devel@edk2.groups.io; Huang, Yanbo <yanbo.hu...@intel.com>
Cc: Kinney, Michael D <michael.d.kin...@intel.com>; Liu, Zhiguang 
<zhiguang....@intel.com>
Subject: 回复: [edk2-devel] [PATCH] MdePkg/UefiDevicePathLib: reback the 
DevicePathUtilitiesStandaloneMm

Yanbo:
  Previous change has been reviewed and merged. Please see the detail
https://edk2.groups.io/g/devel/message/91799

Thanks
Liming
> -----邮件原件-----
> 发件人: devel@edk2.groups.io <devel@edk2.groups.io> 代表 Huang, Yanbo
> 发送时间: 2022年8月5日 10:42
> 收件人: devel@edk2.groups.io
> 抄送: Yanbo Huang <yanbo.hu...@intel.com>; Michael D Kinney 
> <michael.d.kin...@intel.com>; Liming Gao <gaolim...@byosoft.com.cn>; 
> Zhiguang Liu <zhiguang....@intel.com>
> 主题: [edk2-devel] [PATCH] MdePkg/UefiDevicePathLib: reback the 
> DevicePathUtilitiesStandaloneMm
> 
> From: Yanbo Huang <yanbo.hu...@intel.com>
> 
> reback the DevicePathUtilitiesStandaloneMm to unblock the downstream 
> sync
> 
> Signed-off-by: Yanbo Huang <yanbo.hu...@intel.com>
> CC: Michael D Kinney <michael.d.kin...@intel.com>
> CC: Liming Gao <gaolim...@byosoft.com.cn>
> CC: Zhiguang Liu <zhiguang....@intel.com>
> 
> ---
>  .../DevicePathUtilitiesStandaloneMm.c         | 39 ++++++++++
>  .../UefiDevicePathLibStandaloneMm.inf         | 75
> +++++++++++++++++++
>  2 files changed, 114 insertions(+)
>  create mode 100644
> MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesStandaloneMm.c
>  create mode 100644
> MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibStandaloneMm.inf
> 
> diff --git
> a/MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesStandaloneMm.c
> b/MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesStandaloneMm.c
> new file mode 100644
> index 0000000000..096f835b90
> --- /dev/null
> +++
> b/MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesStandaloneMm.c
> @@ -0,0 +1,39 @@
> +/** @file
> +  Device Path services. The thing to remember is device paths are 
> +built
out
> of
> +  nodes. The device path is terminated by an end node that is length  
> + sizeof(EFI_DEVICE_PATH_PROTOCOL). That would be why there is
> sizeof(EFI_DEVICE_PATH_PROTOCOL)
> +  all over this file.
> +
> +  The only place where multi-instance device paths are supported is 
> + in  environment varibles. Multi-instance device paths should never 
> + be
placed
> +  on a Handle.
> +
> +  Copyright (c) 2006 - 2018, Intel Corporation. All rights 
> + reserved.<BR>  Copyright (c) Microsoft Corporation.
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> +**/
> +
> +#include "UefiDevicePathLib.h"
> +
> +/**
> +  Retrieves the device path protocol from a handle.
> +
> +  This function returns the device path protocol from the handle
specified by
> Handle.
> +  If Handle is NULL or Handle does not contain a device path 
> + protocol,
then
> NULL
> +  is returned.
> +
> +  @param  Handle                     The handle from which to
> retrieve the device
> +                                     path protocol.
> +
> +  @return The device path protocol from the handle specified by Handle.
> +
> +**/
> +EFI_DEVICE_PATH_PROTOCOL *
> +EFIAPI
> +DevicePathFromHandle (
> +  IN EFI_HANDLE  Handle
> +  )
> +{
> +  return NULL;
> +}
> diff --git
> a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibStandaloneMm.inf
> b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibStandaloneMm.inf
> new file mode 100644
> index 0000000000..23fedf38b7
> --- /dev/null
> +++
> b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibStandaloneMm.inf
> @@ -0,0 +1,75 @@
> +## @file
> +# Instance of Device Path Library based on Memory Allocation Library.
> +#
> +# Device Path Library that layers on top of the Memory Allocation
Library.
> +#
> +# Copyright (c) 2007 - 2018, Intel Corporation. All rights 
> +reserved.<BR> # Copyright (c) Microsoft Corporation.
> +#
> +#  SPDX-License-Identifier: BSD-2-Clause-Patent # # ##
> +
> +[Defines]
> +  INF_VERSION                    = 0x00010005
> +  BASE_NAME                      = UefiDevicePathLib
> +  MODULE_UNI_FILE                = UefiDevicePathLib.uni
> +  FILE_GUID                      =
> D8E58437-44D3-4154-B7A7-EB794923EF12
> +  MODULE_TYPE                    = MM_STANDALONE
> +  PI_SPECIFICATION_VERSION       = 0x00010032
> +  VERSION_STRING                 = 1.0
> +  LIBRARY_CLASS                  = DevicePathLib |
> MM_STANDALONE MM_CORE_STANDALONE
> +
> +
> +#
> +#  VALID_ARCHITECTURES           = IA32 X64 EBC
> +#
> +
> +[Sources]
> +  DevicePathUtilities.c
> +  DevicePathUtilitiesStandaloneMm.c
> +  DevicePathToText.c
> +  DevicePathFromText.c
> +  UefiDevicePathLib.c
> +  UefiDevicePathLib.h
> +
> +[Packages]
> +  MdePkg/MdePkg.dec
> +
> +[LibraryClasses]
> +  BaseLib
> +  MemoryAllocationLib
> +  DebugLib
> +  BaseMemoryLib
> +  PcdLib
> +  PrintLib
> +
> +[Guids]
> +  ## SOMETIMES_CONSUMES  ## GUID
> +  gEfiVTUTF8Guid
> +  ## SOMETIMES_CONSUMES  ## GUID
> +  gEfiVT100Guid
> +  ## SOMETIMES_CONSUMES  ## GUID
> +  gEfiVT100PlusGuid
> +  ## SOMETIMES_CONSUMES  ## GUID
> +  gEfiPcAnsiGuid
> +  ## SOMETIMES_CONSUMES  ## GUID
> +  gEfiUartDevicePathGuid
> +  ## SOMETIMES_CONSUMES  ## GUID
> +  gEfiSasDevicePathGuid
> +  ## SOMETIMES_CONSUMES  ## GUID
> +  gEfiVirtualDiskGuid
> +  ## SOMETIMES_CONSUMES  ## GUID
> +  gEfiVirtualCdGuid
> +  ## SOMETIMES_CONSUMES  ## GUID
> +  gEfiPersistentVirtualDiskGuid
> +  ## SOMETIMES_CONSUMES  ## GUID
> +  gEfiPersistentVirtualCdGuid
> +
> +[Protocols]
> +  gEfiDevicePathProtocolGuid                    ##
> SOMETIMES_CONSUMES
> +  gEfiDebugPortProtocolGuid                     ## UNDEFINED
> +
> +[Pcd]
> +  gEfiMdePkgTokenSpaceGuid.PcdMaximumDevicePathNodeCount    ##
> SOMETIMES_CONSUMES
> --
> 2.31.1.windows.1
> 
> 
> 
> 
> 





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