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authorTan, Dun <dun.tan@intel.com>2023-01-03 13:56:17 +0800
committermergify[bot] <37929162+mergify[bot]@users.noreply.github.com>2023-01-03 06:41:11 +0000
commitb670700ddf5eb1dd958d60eb4f2a51e0636206f9 (patch)
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parentbbd30066e137c036db140b6e58e6e172e2827eb3 (diff)
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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.tan@intel.com> Cc: Eric Dong <eric.dong@intel.com> Reviewed-by: Ray Ni <ray.ni@intel.com> Cc: Rahul Kumar <rahul1.kumar@intel.com>
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