Use gMmst from MmServiceTableLib in MmSaveStateLib

["duntan" <dun.tan@intel.com>]

Hi Abdul,

In the new MmSaveStateLib created in this patch set, gSmst from SmmServiceTableLib is used. This causes that only DXE_SMM_DRIVER type module can consume this lib but MM_STANDALONE type module cannot.

In current edk2, there are different MmServicesTableLib and SmmServicesTableLib:
StadaloneMmServicesTableLib(MmServicesTableLib|MM_STANDALONE): initialize gMmst in standalone SMM env. 
                  MmServicesTableLib(MmServicesTableLib|DXE_SMM_DRIVER): initialize gMmst in legacy SMM env. 
SmmServicesTableLib(SmmServicesTableLib|DXE_SMM_DRIVER): initialize gSmst in legacy SMM env.

If MmSaveStateLib uses gMmst from MmServiceTableLib instead of gSmst, then MmSaveStateLib can be consumed by both DXE_SMM_DRIVER and MM_STANDALONE module.
Could you pls send patch to fix this?

Thanks,
Dun

-----Original Message-----
From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Abdul Lateef Attar via groups.io
Sent: Sunday, July 2, 2023 12:14 PM
To: devel@edk2.groups.io
Cc: Abdul Lateef Attar <abdattar@amd.com>; Paul Grimes <paul.grimes@amd.com>; Abner Chang <abner.chang@amd.com>; Dong, Eric <eric.dong@intel.com>; Ni, Ray <ray.ni@intel.com>; Kumar, Rahul R <rahul.r.kumar@intel.com>; Gerd Hoffmann <kraxel@redhat.com>; Kinney, Michael D <michael.d.kinney@intel.com>; Gao, Liming <gaoliming@byosoft.com.cn>; Liu, Zhiguang <zhiguang.liu@intel.com>; Ard Biesheuvel <ardb+tianocore@kernel.org>; Yao, Jiewen <jiewen.yao@intel.com>; Justen, Jordan L <jordan.l.justen@intel.com>
Subject: [edk2-devel] [PATCH v15 0/8] Adds AmdSmmCpuFeaturesLib and MmSaveStateLib

Backward-compatibility changes:
  This patch series removes the SmmCpuFeaturesReadSaveStateRegister
  and SmmCpuFeaturesWriteSaveStateRegister interface/function.
  SmmReadSaveState() and SmmWriteSaveState() now directly invokes MmSaveStateLib
  routines to save/restore registers.

PR: https://github.com/tianocore/edk2/pull/4597

V15: Delta changes
  Rebase the branch and fix the merge conflicts.
V14: Delta changes
  Added @note to the MmSaveStateLib.h.
  SaveState(Read/Write) of EFI_SMM_SAVE_STATE_REGISTER_PROCESSOR_ID/EFI_MM_SAVE_STATE_REGISTER_PROCESSOR_ID
  is handled by PiSmmCpuDxeSmm driver.
  Fixed PatchCheck warnings.
V13: Delta changes
  Address review comments from Ray Ni
  Changed the BASE _NAME of AmdSmmCpuFeaturesLib.
  Removed EFIAPI from local function.
  Removed CpuIndex parameter from MmSaveStateGetRegisterLma
  Modifed MmSaveStateGetRegisterIndex () to accept RegOffset
    as second parameter.
  Removed FILE_GUID library instance for intel implemention from UefiCpuPkg.dsc.
V12:
  Addressed review comments from Michael.
  Added LibraryClasses to .inf file.
  removed duplicate MACRO definations.
  Moved related MACRO defination to respective file.
V11: Delta changes
  Drop the OVMF implementation of MmSaveStateLib
V10: Delta changes:
  Addressed review comments from Abner.
V9: Delta changes:
  Addressed review comments.
  Rename to MmSaveStateLib.
  Also rename SMM_ defines to MM_.
  Implemented OVMF MmSaveStateLib.
  Removes SmmCpuFeaturesReadSaveStateRegister and SmmCpuFeaturesWriteSaveStateRegister
  function interface.
V8 delta changes:
   Addressed review comments from Abner,
   Fix the whitespace error.
   Seperate the Ovmf changes to another patch
V7 delta changes:
   Adds SmmSmramSaveStateLib for Intel processor.
   Integrate SmmSmramSaveStateLib library.
V6 delta changes:
   Addressed review comments for Ray NI.
   removed unnecessary EFIAPI.
V5 delta changes:
   rebase to master branch.
   updated Reviewed-by
V4 delta changes:
  rebase to master branch.
  added reviewed-by.
V3 delta changes:
  Addressed review comments from Abner chang.
  Re-arranged patch order.

Cc: Paul Grimes <paul.grimes@amd.com>
Cc: Abner Chang <abner.chang@amd.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Abdul Lateef Attar <abdattar@amd.com>

Abdul Lateef Attar (8):
  MdePkg: Adds AMD SMRAM save state map
  UefiCpuPkg: Adds MmSaveStateLib library class
  UefiCpuPkg: Implements MmSaveStateLib library instance
  UefiCpuPkg/SmmCpuFeaturesLib: Restructure arch-dependent code
  UefiCpuPkg: Implements SmmCpuFeaturesLib for AMD Family
  UefiCpuPkg: Implements MmSaveStateLib for Intel
  UefiCpuPkg: Removes SmmCpuFeaturesReadSaveStateRegister
  OvmfPkg: Uses MmSaveStateLib library

 UefiCpuPkg/UefiCpuPkg.dec                     |   4 +
 OvmfPkg/OvmfPkgIa32.dsc                       |   1 +
 OvmfPkg/OvmfPkgIa32X64.dsc                    |   3 +
 OvmfPkg/OvmfPkgX64.dsc                        |   1 +
 UefiCpuPkg/UefiCpuPkg.dsc                     |  12 +
 .../MmSaveStateLib/AmdMmSaveStateLib.inf      |  34 +
 .../MmSaveStateLib/IntelMmSaveStateLib.inf    |  34 +
 .../AmdSmmCpuFeaturesLib.inf                  |  38 +
 UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf  |   2 +
 .../Include/Register/Amd/SmramSaveStateMap.h  | 194 +++++
 UefiCpuPkg/Include/Library/MmSaveStateLib.h   |  74 ++
 .../Include/Library/SmmCpuFeaturesLib.h       |  52 --
 .../Library/MmSaveStateLib/MmSaveState.h      |  94 +++
 UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h    |  56 +-
 .../SmmCpuFeaturesLib/SmmCpuFeaturesLib.c     | 767 ------------------
 .../Library/MmSaveStateLib/AmdMmSaveState.c   | 309 +++++++
 .../Library/MmSaveStateLib/IntelMmSaveState.c | 410 ++++++++++
 .../MmSaveStateLib/MmSaveStateCommon.c        | 132 +++
 .../SmmCpuFeaturesLib/AmdSmmCpuFeaturesLib.c  | 387 +++++++++
 .../IntelSmmCpuFeaturesLib.c                  |  70 ++
 .../SmmCpuFeaturesLibCommon.c                 | 128 ---
 UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c    |  11 +-
 UefiCpuPkg/PiSmmCpuDxeSmm/SmramSaveState.c    | 500 +-----------
 MdePkg/MdePkg.ci.yaml                         |   4 +-
 24 files changed, 1809 insertions(+), 1508 deletions(-)  create mode 100644 UefiCpuPkg/Library/MmSaveStateLib/AmdMmSaveStateLib.inf
 create mode 100644 UefiCpuPkg/Library/MmSaveStateLib/IntelMmSaveStateLib.inf
 create mode 100644 UefiCpuPkg/Library/SmmCpuFeaturesLib/AmdSmmCpuFeaturesLib.inf
 create mode 100644 MdePkg/Include/Register/Amd/SmramSaveStateMap.h
 create mode 100644 UefiCpuPkg/Include/Library/MmSaveStateLib.h
 create mode 100644 UefiCpuPkg/Library/MmSaveStateLib/MmSaveState.h
 create mode 100644 UefiCpuPkg/Library/MmSaveStateLib/AmdMmSaveState.c
 create mode 100644 UefiCpuPkg/Library/MmSaveStateLib/IntelMmSaveState.c
 create mode 100644 UefiCpuPkg/Library/MmSaveStateLib/MmSaveStateCommon.c
 create mode 100644 UefiCpuPkg/Library/SmmCpuFeaturesLib/AmdSmmCpuFeaturesLib.c

--
2.25.1