[edk2-devel] [PATCH v5 0/6] MdePkg: Add macro definitions for CET feature for NASM files.

["Sheng Wei" <w.sheng@intel.com>]

Patch V5:
  File cet.inc will be used in both MdePkg UefiCpuPkg.
  Move cet.inc file from UefiCpuPkg to MdePkg.
  Use macro CR4_CET_BIT to replace hard code value for
   both LongJump.nasm and SetJump.nasm.

Patch V4:
  Separate the changes to 5 patches.
    1) Add macro definitions for CET feature for NASM files.
    2) Use macro CR4_CET_BIT to replace hard code value in Cet.nasm.
    3) Use CET macro definitions in Cet.inc for SmiEntry.nasm files.
    4) Only change CR4.CET bit for enable/disable CET.
    5) Backup and Restore MSR IA32_U_CET in SMI handler.
  Remove some unused code.
    It is no need to clear MSR IA32_S_CET,
     because clear CR4.CET bit will disable all CET functions.
    Since CET is disabled between clear CR4.CET and run 'rsm',
     it is no need to delay MSR IA32_S_CET restoration.

Patch V3:
  Remove the 3rd patch. mSmmInterruptSspTables is a global variable.
  It is unnecessary to initializ it to zero manually.

Patch V2:
  No function change with Patch V1.
  Split the patch to into 3 separate patches.


Sheng Wei (6):
  MdePkg: Add macro definitions for CET feature for NASM files.
  UefiCpuPkg: Use macro CR4_CET_BIT to replace hard code value in
    Cet.nasm.
  UefiCpuPkg: Use CET macro definitions in Cet.inc for SmiEntry.nasm
    files.
  UefiCpuPkg: Only change CR4.CET bit for enable and disable CET.
  UefiCpuPkg: Backup and Restore MSR IA32_U_CET in SMI handler.
  MdePkg: Use macro CR4_CET_BIT to replace hard code value.

 MdePkg/Include/Cet.inc                       | 26 +++++++++++++
 MdePkg/Library/BaseLib/Ia32/LongJump.nasm    |  3 +-
 MdePkg/Library/BaseLib/Ia32/SetJump.nasm     |  3 +-
 MdePkg/Library/BaseLib/X64/LongJump.nasm     |  3 +-
 MdePkg/Library/BaseLib/X64/SetJump.nasm      |  3 +-
 UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/Cet.nasm      |  5 ++-
 UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmiEntry.nasm | 39 +++++++++++--------
 UefiCpuPkg/PiSmmCpuDxeSmm/X64/Cet.nasm       |  5 ++-
 UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm  | 40 +++++++++++---------
 9 files changed, 86 insertions(+), 41 deletions(-)
 create mode 100644 MdePkg/Include/Cet.inc

-- 
2.26.2.windows.1



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