Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: b670700ddf5eb1dd958d60eb4f2a51e0636206f9
https://github.com/tianocore/edk2/commit/b670700ddf5eb1dd958d60eb4f2a51e0636206f9
Author: Tan, Dun <dun....@intel.com>
Date: 2023-01-03 (Tue, 03 Jan 2023)
Changed paths:
M UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c
Log Message:
-----------
UefiCpuPkg/PiSmmCpuDxeSmm:Fix PF issue caused by smm page table code
When setting new page table pool to RO, only disable/enable WP when
Cr0.WP has been set to 1 to fix potential PF caused by b822be1a20
(UefiCpuPkg/PiSmmCpuDxeSmm: Introduce page table pool mechanism).
With previous code, if someone want to modify the page table and
Cr0.WP has been cleared before modify page table, Cr0.WP may be set
to 1 again since new pool may be generated during this process
Then PF fault may happens.
Signed-off-by: Dun Tan <dun....@intel.com>
Cc: Eric Dong <eric.d...@intel.com>
Reviewed-by: Ray Ni <ray...@intel.com>
Cc: Rahul Kumar <rahul1.ku...@intel.com>
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