[edk2-devel] [PATCH] UefiCpuPkg/CpuMpPei: Don't write CR3 in ConvertMemoryPageToNotPresent

["Zhiguang Liu" <zhiguang.liu@intel.com>]

After ConvertMemoryPageToNotPresent, there is always a flush TLB
function. So, to improve performance, there is no need to write CR3
inside ConvertMemoryPageToNotPresent

Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>
---
 UefiCpuPkg/CpuMpPei/CpuPaging.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/UefiCpuPkg/CpuMpPei/CpuPaging.c b/UefiCpuPkg/CpuMpPei/CpuPaging.c
index 15c7015fb8..c6894458f7 100644
--- a/UefiCpuPkg/CpuMpPei/CpuPaging.c
+++ b/UefiCpuPkg/CpuMpPei/CpuPaging.c
@@ -167,7 +167,6 @@ ConvertMemoryPageToNotPresent (
   }
 
   ASSERT_EFI_ERROR (Status);
-  AsmWriteCr3 (PageTable);
   return Status;
 }
 
-- 
2.31.1.windows.1



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