回复: [PATCH v1 1/1] MdePkg: add SmmCpuRendezvousLib.h and SmmCpuRendezvousLibNull implement.

["gaoliming" <gaoliming@byosoft.com.cn>]

Zhihao:
  To be compatible, you can also add the default SmmCpuRendezvousLib library instance (SmmCpuRendezvousLibNull) into MdeLibs.dsc.inc. Then, this change is compatible. 

Thanks
Liming
> -----邮件原件-----
> 发件人: Zhihao Li <zhihao.li@intel.com>
> 发送时间: 2022年4月22日 18:07
> 收件人: devel@edk2.groups.io
> 抄送: Michael D Kinney <michael.d.kinney@intel.com>; Liming Gao
> <gaoliming@byosoft.com.cn>; Eric Dong <eric.dong@intel.com>; Ray Ni
> <ray.ni@intel.com>; Michael Kubacki <mikuback@linux.microsoft.com>;
> Siyuan Fu <siyuan.fu@intel.com>
> 主题: [PATCH v1 1/1] MdePkg: add SmmCpuRendezvousLib.h and
> SmmCpuRendezvousLibNull implement.
> 
> REF： https://bugzilla.tianocore.org/show_bug.cgi?id=3912
> 
> UefiCpuPkg define a new Protocol with the new services
> SmmWaitForAllProcessor(), which can be used by SMI handler
> to optionally wait for other APs to complete SMM rendezvous in
> relaxed AP mode.
> 
> VariableSmm and VariableStandaloneMM driver in MdeModulePkg need
> to use this services but MdeModulePkg can't depend on UefiCpuPkg.
> 
> Thus, the solution is moving SmmCpuRendezvouslib.h from UefiCpuPkg
> to MdePkg and creating SmmCpuRendezvousLib NullLib version
> implementation in MdePkg as dependency for the pkg that can't
> depend on UefiCpuPkg.
> 
> Cc: Michael D Kinney <michael.d.kinney@intel.com>
> Cc: Liming Gao <gaoliming@byosoft.com.cn>
> Cc: Eric Dong <eric.dong@intel.com>
> Cc: Ray Ni <ray.ni@intel.com>
> Cc: Michael Kubacki <mikuback@linux.microsoft.com>
> Cc: Siyuan Fu <siyuan.fu@intel.com>
> 
> Signed-off-by: Zhihao Li <zhihao.li@intel.com>
> ---
>  MdePkg/Library/SmmCpuRendezvousLibNull/SmmCpuRendezvousLibNull.c
> | 29 ++++++++++++++++++++
>  {UefiCpuPkg => MdePkg}/Include/Library/SmmCpuRendezvousLib.h
> |  0
>  MdePkg/Library/SmmCpuRendezvousLibNull/SmmCpuRendezvousLibNull.inf
> | 26 ++++++++++++++++++
>  MdePkg/MdePkg.dec
> |  3 ++
>  MdePkg/MdePkg.dsc
> |  1 +
>  UefiCpuPkg/UefiCpuPkg.dec
> |  3 --
>  6 files changed, 59 insertions(+), 3 deletions(-)
> 
> diff --git
> a/MdePkg/Library/SmmCpuRendezvousLibNull/SmmCpuRendezvousLibNull.c
> b/MdePkg/Library/SmmCpuRendezvousLibNull/SmmCpuRendezvousLibNull.c
> new file mode 100644
> index 000000000000..474195bbb374
> --- /dev/null
> +++
> b/MdePkg/Library/SmmCpuRendezvousLibNull/SmmCpuRendezvousLibNull.c
> @@ -0,0 +1,29 @@
> +/** @file
> 
> +  SMM CPU Rendezvous sevice implement.
> 
> +
> 
> +  Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
> 
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> 
> +
> 
> +**/
> 
> +
> 
> +#include <Library/DebugLib.h>
> 
> +#include <Library/SmmCpuRendezvousLib.h>
> 
> +
> 
> +/**
> 
> +  This routine wait for all AP processors to arrive in SMM.
> 
> +
> 
> +  @param[in] BlockingMode  Blocking mode or non-blocking mode.
> 
> +
> 
> +  @retval EFI_SUCCESS  All avaiable APs arrived.
> 
> +  @retval EFI_TIMEOUT  Wait for all APs until timeout.
> 
> +  @retval OTHER        Fail to register SMM CPU Rendezvous service
> Protocol.
> 
> +**/
> 
> +EFI_STATUS
> 
> +EFIAPI
> 
> +SmmWaitForAllProcessor (
> 
> +  IN BOOLEAN  BlockingMode
> 
> +  )
> 
> +{
> 
> +  ASSERT (FALSE);
> 
> +  return EFI_SUCCESS;
> 
> +}
> 
> diff --git a/UefiCpuPkg/Include/Library/SmmCpuRendezvousLib.h
> b/MdePkg/Include/Library/SmmCpuRendezvousLib.h
> similarity index 100%
> rename from UefiCpuPkg/Include/Library/SmmCpuRendezvousLib.h
> rename to MdePkg/Include/Library/SmmCpuRendezvousLib.h
> diff --git
> a/MdePkg/Library/SmmCpuRendezvousLibNull/SmmCpuRendezvousLibNull.i
> nf
> b/MdePkg/Library/SmmCpuRendezvousLibNull/SmmCpuRendezvousLibNull.i
> nf
> new file mode 100644
> index 000000000000..7c9bac9af2ff
> --- /dev/null
> +++
> b/MdePkg/Library/SmmCpuRendezvousLibNull/SmmCpuRendezvousLibNull.i
> nf
> @@ -0,0 +1,26 @@
> +## @file
> 
> +# SMM CPU Rendezvous service lib.
> 
> +#
> 
> +# This is SMM CPU rendezvous service lib that wait for all
> 
> +# APs to enter SMM mode.
> 
> +#
> 
> +# Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
> 
> +# SPDX-License-Identifier: BSD-2-Clause-Patent
> 
> +#
> 
> +##
> 
> +
> 
> +[Defines]
> 
> +  INF_VERSION                    = 0x00010005
> 
> +  BASE_NAME                      = SmmCpuRendezvousLibNull
> 
> +  FILE_GUID                      =
> 1e5790ea-d013-4d7b-9047-b4342a762027
> 
> +  MODULE_TYPE                    = DXE_SMM_DRIVER
> 
> +  LIBRARY_CLASS                  =
> SmmCpuRendezvousLib|MM_STANDALONE DXE_SMM_DRIVER
> 
> +
> 
> +[Sources]
> 
> +  SmmCpuRendezvousLibNull.c
> 
> +
> 
> +[Packages]
> 
> +  MdePkg/MdePkg.dec
> 
> +
> 
> +[LibraryClasses]
> 
> +  DebugLib
> 
> diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec
> index faeb28c80cbd..85a4398e8f65 100644
> --- a/MdePkg/MdePkg.dec
> +++ b/MdePkg/MdePkg.dec
> @@ -272,6 +272,9 @@
>    #
> 
>    CcProbeLib|Include/Library/CcProbeLib.h
> 
> 
> 
> +  ## @libraryclass  Provides function for SMM CPU Rendezvous Library.
> 
> +  SmmCpuRendezvousLib|Include/Library/SmmCpuRendezvousLib.h
> 
> +
> 
>  [LibraryClasses.IA32, LibraryClasses.X64, LibraryClasses.AARCH64]
> 
>    ##  @libraryclass  Provides services to generate random number.
> 
>    #
> 
> diff --git a/MdePkg/MdePkg.dsc b/MdePkg/MdePkg.dsc
> index c8d282882ec1..5e2ea32088fa 100644
> --- a/MdePkg/MdePkg.dsc
> +++ b/MdePkg/MdePkg.dsc
> @@ -131,6 +131,7 @@
> 
> 
>    MdePkg/Library/RegisterFilterLibNull/RegisterFilterLibNull.inf
> 
>    MdePkg/Library/CcProbeLibNull/CcProbeLibNull.inf
> 
> +
> MdePkg/Library/SmmCpuRendezvousLibNull/SmmCpuRendezvousLibNull.inf
> 
> 
> 
>  [Components.IA32, Components.X64, Components.ARM,
> Components.AARCH64]
> 
>    #
> 
> diff --git a/UefiCpuPkg/UefiCpuPkg.dec b/UefiCpuPkg/UefiCpuPkg.dec
> index 525cde463435..1951eb294c6c 100644
> --- a/UefiCpuPkg/UefiCpuPkg.dec
> +++ b/UefiCpuPkg/UefiCpuPkg.dec
> @@ -62,9 +62,6 @@
>    ##  @libraryclass  Provides function for loading microcode.
> 
>    MicrocodeLib|Include/Library/MicrocodeLib.h
> 
> 
> 
> -  ## @libraryclass  Provides function for SMM CPU Rendezvous Library.
> 
> -  SmmCpuRendezvousLib|Include/Library/SmmCpuRendezvousLib.h
> 
> -
> 
>  [Guids]
> 
>    gUefiCpuPkgTokenSpaceGuid      = { 0xac05bf33, 0x995a, 0x4ed4,
> { 0xaa, 0xb8, 0xef, 0x7a, 0xe8, 0xf, 0x5c, 0xb0 }}
> 
>    gMsegSmramGuid                 = { 0x5802bce4, 0xeeee, 0x4e33,
> { 0xa1, 0x30, 0xeb, 0xad, 0x27, 0xf0, 0xe4, 0x39 }}
> 
> --
> 2.26.2.windows.1