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 (5):
UefiCpuPkg: 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.
UefiCpuPkg/Include/Cet.inc | 26 +++++++++++++
UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/Cet.nasm | 5 ++-
UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmiEntry.nasm | 39 +++++++++++--------
UefiCpuPkg/PiSmmCpuDxeSmm/X64/Cet.nasm | 5 ++-
UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm | 40 +++++++++++---------
5 files changed, 78 insertions(+), 37 deletions(-)
create mode 100644 UefiCpuPkg/Include/Cet.inc
--
2.26.2.windows.1
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