[edk2-devel] [PATCH v2] UefiCpuPkg/MmSaveStateLib: Remove checking Smm Rev ID in AMD MmSaveStateLib

["Jacque Lin via groups.io" <hsienchieh.lin=amd.com@groups.io>]

Remove checking SMM Rev ID in AMD Save State lib when reading Save
State Register EFI_MM_SAVE_STATE_REGISTER_IO.
For AMD, it is not necessary to check SmmRevId when reading Save State
Register EFI_MM_SAVE_STATE_REGISTER_IO.

Cc: Abdul Lateef Attar <AbdulLateef.Attar@amd.com>
Cc: Abner Chang <abner.chang@amd.com>
Signed-off-by: Jacque Lin <hsienchieh.lin@amd.com>
---
 UefiCpuPkg/Library/MmSaveStateLib/AmdMmSaveState.c | 13 -------------
 1 file changed, 13 deletions(-)

diff --git a/UefiCpuPkg/Library/MmSaveStateLib/AmdMmSaveState.c b/UefiCpuPkg/Library/MmSaveStateLib/AmdMmSaveState.c
index 3315a6cc44..c4bf6ad4bb 100644
--- a/UefiCpuPkg/Library/MmSaveStateLib/AmdMmSaveState.c
+++ b/UefiCpuPkg/Library/MmSaveStateLib/AmdMmSaveState.c
@@ -102,7 +102,6 @@ MmSaveStateReadRegister (
   OUT VOID                        *Buffer

   )

 {

-  UINT32                     SmmRevId;

   EFI_MM_SAVE_STATE_IO_INFO  *IoInfo;

   AMD_SMRAM_SAVE_STATE_MAP   *CpuSaveState;

   UINT8                      DataWidth;

@@ -124,18 +123,6 @@ MmSaveStateReadRegister (
 

   // Check for special EFI_MM_SAVE_STATE_REGISTER_IO

   if (Register == EFI_MM_SAVE_STATE_REGISTER_IO) {

-    //

-    // Get SMM Revision ID

-    //

-    MmSaveStateReadRegisterByIndex (CpuIndex, AMD_MM_SAVE_STATE_REGISTER_SMMREVID_INDEX, sizeof (SmmRevId), &SmmRevId);

-

-    //

-    // See if the CPU supports the IOMisc register in the save state

-    //

-    if (SmmRevId < AMD_SMM_MIN_REV_ID_X64) {

-      return EFI_NOT_FOUND;

-    }

-

     // Check if IO Restart Dword [IO Trap] is valid or not using bit 1.

     if (!(CpuSaveState->x64.IO_DWord & 0x02u)) {

       return EFI_NOT_FOUND;

-- 
2.36.1.windows.1



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