Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: 11868992cc297387878bd9fb69db3c7aaa094f31
https://github.com/tianocore/edk2/commit/11868992cc297387878bd9fb69db3c7aaa094f31
Author: Ray Ni <[email protected]>
Date: 2026-03-09 (Mon, 09 Mar 2026)
Changed paths:
M IntelFsp2Pkg/FspSecCore/X64/Fsp24ApiEntryM.nasm
M IntelFsp2Pkg/FspSecCore/X64/FspApiEntryM.nasm
M IntelFsp2Pkg/Library/BaseFspCommonLib/FspCommonLib.c
M IntelFsp2Pkg/Library/BaseFspSwitchStackLib/X64/Stack.nasm
Log Message:
-----------
IntelFsp2Pkg: Save/restore FSBASE/GSBASE in entry and exit
FSP may store something in FSBASE/GSBASE while bootloader may do so as well.
Add the FSBASE/GSBASE save/restore logic in the FSP entry and exit
to avoid the contents in FSBASE/GSBASE are corrupted by the other party.
The change assumes there is no very old CPU that does not support
rdfsbase/wrfsbase/rdgsbase/wrgsbase instructions.
Signed-off-by: Ray Ni <[email protected]>
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